Fundies. English
Segment disclosures
Company overviewAon plc
Each reported dimension combination stays separate. Revenue and operating income are shown as reported, with their dates and sources.
Revenue · Reported segment facts
83 dimension combinations 681 retained observations 45 reported periods Partial retained history
Counts describe retained dimensioned rows only. Periods and members can change across reports, and this view does not infer missing values or expected segment totals.
Intersegment Elimination · Human Capital Segment
Consolidation Items · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:IntersegmentEliminationMember;us-gaap:StatementBusinessSegmentsAxis=aon:HumanCapitalSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 3000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 6000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-03-31 | 3000000 | USD | 20260501 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 5000000 | USD | 20260213 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 3000000 | USD | 20251031 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 7000000 | USD | 20251031 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 2000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 4000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 2000000 | USD | 20260501 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 12000000 | USD | 20260213 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 3000000 | USD | 20251031 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 10000000 | USD | 20251031 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 5000000 | USD | 20250725 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 7000000 | USD | 20250725 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 2000000 | USD | 20250425 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 6000000 | USD | 20260213 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 8000000 | USD | 20250218 | Open filing evidence |
Intersegment Elimination · Risk Capital Segment
Consolidation Items · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:IntersegmentEliminationMember;us-gaap:StatementBusinessSegmentsAxis=aon:RiskCapitalSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 1000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 5000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-03-31 | 4000000 | USD | 20260501 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 11000000 | USD | 20260213 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 1000000 | USD | 20251031 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 5000000 | USD | 20251031 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 1000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 5000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 5000000 | USD | 20260501 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 16000000 | USD | 20260213 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 1000000 | USD | 20251031 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 16000000 | USD | 20251031 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 10000000 | USD | 20250725 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 16000000 | USD | 20250725 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 6000000 | USD | 20250425 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 6000000 | USD | 20260213 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 9000000 | USD | 20250218 | Open filing evidence |
Operating Segments · Commercial Risk Solutions · Risk Capital Segment
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=aon:CommercialRiskSolutionsMember;us-gaap:StatementBusinessSegmentsAxis=aon:RiskCapitalSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 2223000000 | USD | 20260501 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 8497000000 | USD | 20260213 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 1988000000 | USD | 20251031 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 6168000000 | USD | 20251031 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 2178000000 | USD | 20250725 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 4180000000 | USD | 20250725 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 2002000000 | USD | 20260501 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 7861000000 | USD | 20260213 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 1852000000 | USD | 20251031 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 5675000000 | USD | 20251031 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 2015000000 | USD | 20250725 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 3823000000 | USD | 20250725 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 1808000000 | USD | 20250425 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 7043000000 | USD | 20260213 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 6715000000 | USD | 20250218 | Open filing evidence |
Operating Segments · Health Solutions · Human Capital Segment
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=aon:HealthSolutionsMember;us-gaap:StatementBusinessSegmentsAxis=aon:HumanCapitalSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 1119000000 | USD | 20260501 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 3839000000 | USD | 20260213 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 935000000 | USD | 20251031 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 2733000000 | USD | 20251031 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 772000000 | USD | 20250725 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 1798000000 | USD | 20250725 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 1026000000 | USD | 20260501 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 3335000000 | USD | 20260213 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 870000000 | USD | 20251031 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 2265000000 | USD | 20251031 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 662000000 | USD | 20250725 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 1395000000 | USD | 20250725 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 733000000 | USD | 20250425 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 2433000000 | USD | 20260213 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 2224000000 | USD | 20250218 | Open filing evidence |
Operating Segments · Reinsurance Solutions · Risk Capital Segment
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=aon:ReinsuranceSolutionsMember;us-gaap:StatementBusinessSegmentsAxis=aon:RiskCapitalSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 1279000000 | USD | 20260501 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 2793000000 | USD | 20260213 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 537000000 | USD | 20251031 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 2414000000 | USD | 20251031 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 688000000 | USD | 20250725 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 1877000000 | USD | 20250725 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 1189000000 | USD | 20260501 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 2656000000 | USD | 20260213 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 503000000 | USD | 20251031 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 2305000000 | USD | 20251031 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 635000000 | USD | 20250725 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 1802000000 | USD | 20250725 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 1167000000 | USD | 20250425 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 2481000000 | USD | 20260213 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 2190000000 | USD | 20250218 | Open filing evidence |
Operating Segments · Wealth Solutions · Human Capital Segment
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=aon:WealthSolutionsMember;us-gaap:StatementBusinessSegmentsAxis=aon:HumanCapitalSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 420000000 | USD | 20260501 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 2068000000 | USD | 20260213 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 540000000 | USD | 20251031 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 1578000000 | USD | 20251031 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 519000000 | USD | 20250725 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 1038000000 | USD | 20250725 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 519000000 | USD | 20260501 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 1874000000 | USD | 20260213 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 499000000 | USD | 20251031 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 1332000000 | USD | 20251031 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 463000000 | USD | 20250725 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 833000000 | USD | 20250725 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 370000000 | USD | 20250425 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 1431000000 | USD | 20260213 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 1367000000 | USD | 20250218 | Open filing evidence |
Operating Segments · Americas Other Than United States · Human Capital Segment
Consolidation Items · Statement Geographical · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=aon:AmericasOtherThanUnitedStatesMember;us-gaap:StatementBusinessSegmentsAxis=aon:HumanCapitalSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 123000000 | USD | 20260501 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 502000000 | USD | 20260213 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 121000000 | USD | 20251031 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 351000000 | USD | 20251031 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 110000000 | USD | 20250725 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 230000000 | USD | 20250725 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 120000000 | USD | 20260501 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 381000000 | USD | 20260213 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 68000000 | USD | 20251031 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 266000000 | USD | 20251031 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 102000000 | USD | 20250725 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 198000000 | USD | 20250725 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 351000000 | USD | 20260213 | Open filing evidence |
Operating Segments · Americas Other Than United States · Risk Capital Segment
Consolidation Items · Statement Geographical · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=aon:AmericasOtherThanUnitedStatesMember;us-gaap:StatementBusinessSegmentsAxis=aon:RiskCapitalSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 261000000 | USD | 20260501 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 1131000000 | USD | 20260213 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 260000000 | USD | 20251031 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 799000000 | USD | 20251031 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 285000000 | USD | 20250725 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 539000000 | USD | 20250725 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 254000000 | USD | 20260501 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 954000000 | USD | 20260213 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 195000000 | USD | 20251031 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 682000000 | USD | 20251031 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 260000000 | USD | 20250725 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 487000000 | USD | 20250725 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 909000000 | USD | 20260213 | Open filing evidence |
Operating Segments · Europe Middle East And Africa Other Than United Kingdom And Ireland · Human Capital Segment
Consolidation Items · Statement Geographical · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=aon:EuropeMiddleEastAndAfricaOtherThanUnitedKingdomAndIrelandMember;us-gaap:StatementBusinessSegmentsAxis=aon:HumanCapitalSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 370000000 | USD | 20260501 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 832000000 | USD | 20260213 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 155000000 | USD | 20251031 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 636000000 | USD | 20251031 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 165000000 | USD | 20250725 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 481000000 | USD | 20250725 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 316000000 | USD | 20260501 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 724000000 | USD | 20260213 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 131000000 | USD | 20251031 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 550000000 | USD | 20251031 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 138000000 | USD | 20250725 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 419000000 | USD | 20250725 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 636000000 | USD | 20260213 | Open filing evidence |
Operating Segments · Europe Middle East And Africa Other Than United Kingdom And Ireland · Risk Capital Segment
Consolidation Items · Statement Geographical · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=aon:EuropeMiddleEastAndAfricaOtherThanUnitedKingdomAndIrelandMember;us-gaap:StatementBusinessSegmentsAxis=aon:RiskCapitalSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 1119000000 | USD | 20260501 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 2321000000 | USD | 20260213 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 400000000 | USD | 20251031 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 1815000000 | USD | 20251031 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 469000000 | USD | 20250725 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 1415000000 | USD | 20250725 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 946000000 | USD | 20260501 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 2176000000 | USD | 20260213 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 361000000 | USD | 20251031 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 1717000000 | USD | 20251031 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 428000000 | USD | 20250725 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 1356000000 | USD | 20250725 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 2036000000 | USD | 20260213 | Open filing evidence |
Operating Segments · GB · Human Capital Segment
Consolidation Items · Statement Geographical · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=country:GB;us-gaap:StatementBusinessSegmentsAxis=aon:HumanCapitalSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 207000000 | USD | 20260501 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 811000000 | USD | 20260213 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 222000000 | USD | 20251031 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 612000000 | USD | 20251031 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 199000000 | USD | 20250725 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 390000000 | USD | 20250725 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 191000000 | USD | 20260501 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 709000000 | USD | 20260213 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 182000000 | USD | 20251031 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 523000000 | USD | 20251031 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 169000000 | USD | 20250725 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 341000000 | USD | 20250725 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 633000000 | USD | 20260213 | Open filing evidence |
Operating Segments · GB · Risk Capital Segment
Consolidation Items · Statement Geographical · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=country:GB;us-gaap:StatementBusinessSegmentsAxis=aon:RiskCapitalSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 482000000 | USD | 20260501 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 1409000000 | USD | 20260213 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 303000000 | USD | 20251031 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 1144000000 | USD | 20251031 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 411000000 | USD | 20250725 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 841000000 | USD | 20250725 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 430000000 | USD | 20260501 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 1266000000 | USD | 20260213 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 255000000 | USD | 20251031 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 1045000000 | USD | 20251031 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 379000000 | USD | 20250725 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 790000000 | USD | 20250725 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 1186000000 | USD | 20260213 | Open filing evidence |
Operating Segments · IE · Human Capital Segment
Consolidation Items · Statement Geographical · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=country:IE;us-gaap:StatementBusinessSegmentsAxis=aon:HumanCapitalSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 28000000 | USD | 20260501 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 90000000 | USD | 20260213 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 21000000 | USD | 20251031 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 66000000 | USD | 20251031 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 22000000 | USD | 20250725 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 45000000 | USD | 20250725 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 23000000 | USD | 20260501 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 68000000 | USD | 20260213 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 18000000 | USD | 20251031 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 50000000 | USD | 20251031 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 15000000 | USD | 20250725 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 32000000 | USD | 20250725 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 52000000 | USD | 20260213 | Open filing evidence |
Operating Segments · IE · Risk Capital Segment
Consolidation Items · Statement Geographical · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=country:IE;us-gaap:StatementBusinessSegmentsAxis=aon:RiskCapitalSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 25000000 | USD | 20260501 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 95000000 | USD | 20260213 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 21000000 | USD | 20251031 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 67000000 | USD | 20251031 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 24000000 | USD | 20250725 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 46000000 | USD | 20250725 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 22000000 | USD | 20260501 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 78000000 | USD | 20260213 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 20000000 | USD | 20251031 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 56000000 | USD | 20251031 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 20000000 | USD | 20250725 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 36000000 | USD | 20250725 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 61000000 | USD | 20260213 | Open filing evidence |
Operating Segments · US · Human Capital Segment
Consolidation Items · Statement Geographical · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=country:US;us-gaap:StatementBusinessSegmentsAxis=aon:HumanCapitalSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 691000000 | USD | 20260501 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 3304000000 | USD | 20260213 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 858000000 | USD | 20251031 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 2364000000 | USD | 20251031 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 718000000 | USD | 20250725 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 1506000000 | USD | 20250725 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 788000000 | USD | 20260501 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 2997000000 | USD | 20260213 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 880000000 | USD | 20251031 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 1957000000 | USD | 20251031 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 635000000 | USD | 20250725 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 1077000000 | USD | 20250725 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 1868000000 | USD | 20260213 | Open filing evidence |
Operating Segments · US · Risk Capital Segment
Consolidation Items · Statement Geographical · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=country:US;us-gaap:StatementBusinessSegmentsAxis=aon:RiskCapitalSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 1326000000 | USD | 20260501 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 4991000000 | USD | 20260213 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 1229000000 | USD | 20251031 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 3774000000 | USD | 20251031 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 1324000000 | USD | 20250725 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 2545000000 | USD | 20250725 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 1221000000 | USD | 20260501 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 4697000000 | USD | 20260213 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 1206000000 | USD | 20251031 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 3501000000 | USD | 20251031 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 1217000000 | USD | 20250725 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 2295000000 | USD | 20250725 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 4067000000 | USD | 20260213 | Open filing evidence |
Operating Segments · Asia Pacific · Human Capital Segment
Consolidation Items · Statement Geographical · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=srt:AsiaPacificMember;us-gaap:StatementBusinessSegmentsAxis=aon:HumanCapitalSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 120000000 | USD | 20260501 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 368000000 | USD | 20260213 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 98000000 | USD | 20251031 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 282000000 | USD | 20251031 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 77000000 | USD | 20250725 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 184000000 | USD | 20250725 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 107000000 | USD | 20260501 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 330000000 | USD | 20260213 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 90000000 | USD | 20251031 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 251000000 | USD | 20251031 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 66000000 | USD | 20250725 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 161000000 | USD | 20250725 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 324000000 | USD | 20260213 | Open filing evidence |
Operating Segments · Asia Pacific · Risk Capital Segment
Consolidation Items · Statement Geographical · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=srt:AsiaPacificMember;us-gaap:StatementBusinessSegmentsAxis=aon:RiskCapitalSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 289000000 | USD | 20260501 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 1343000000 | USD | 20260213 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 312000000 | USD | 20251031 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 983000000 | USD | 20251031 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 353000000 | USD | 20250725 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 671000000 | USD | 20250725 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 318000000 | USD | 20260501 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 1346000000 | USD | 20260213 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 318000000 | USD | 20251031 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 979000000 | USD | 20251031 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 346000000 | USD | 20250725 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 661000000 | USD | 20250725 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 1265000000 | USD | 20260213 | Open filing evidence |
Operating Segments · Human Capital Segment
Consolidation Items · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=aon:HumanCapitalSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 1244000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 2783000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-03-31 | 1539000000 | USD | 20260501 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 5907000000 | USD | 20260213 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 1475000000 | USD | 20251031 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 4311000000 | USD | 20251031 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 1291000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 2836000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 1545000000 | USD | 20260501 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 5209000000 | USD | 20260213 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 1369000000 | USD | 20251031 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 3597000000 | USD | 20251031 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 1125000000 | USD | 20250725 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 2228000000 | USD | 20250725 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 1103000000 | USD | 20250425 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 3864000000 | USD | 20260213 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 3591000000 | USD | 20250218 | Open filing evidence |
Operating Segments · Risk Capital Segment
Consolidation Items · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=aon:RiskCapitalSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 3006000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 6508000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-03-31 | 3502000000 | USD | 20260501 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 11290000000 | USD | 20260213 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 2525000000 | USD | 20251031 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 8582000000 | USD | 20251031 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 2866000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 6057000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 3191000000 | USD | 20260501 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 10517000000 | USD | 20260213 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 2355000000 | USD | 20251031 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 7980000000 | USD | 20251031 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 2650000000 | USD | 20250725 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 5625000000 | USD | 20250725 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 2975000000 | USD | 20250425 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 9524000000 | USD | 20260213 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 8905000000 | USD | 20250218 | Open filing evidence |
Commercial Risk Solutions · Risk Capital Segment · Operating Segments
Product Or Service · Statement Business Segments · Consolidation Items
Source dimensions
srt:ProductOrServiceAxis=aon:CommercialRiskSolutionsMember;us-gaap:StatementBusinessSegmentsAxis=aon:RiskCapitalSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 2295000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 4518000000 | USD | 20260729 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 2178000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 4180000000 | USD | 20260729 | Open filing evidence |
Health Solutions · Human Capital Segment · Operating Segments
Product Or Service · Statement Business Segments · Consolidation Items
Source dimensions
srt:ProductOrServiceAxis=aon:HealthSolutionsMember;us-gaap:StatementBusinessSegmentsAxis=aon:HumanCapitalSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 818000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 1937000000 | USD | 20260729 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 772000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 1798000000 | USD | 20260729 | Open filing evidence |
Reinsurance Solutions · Risk Capital Segment · Operating Segments
Product Or Service · Statement Business Segments · Consolidation Items
Source dimensions
srt:ProductOrServiceAxis=aon:ReinsuranceSolutionsMember;us-gaap:StatementBusinessSegmentsAxis=aon:RiskCapitalSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 711000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 1990000000 | USD | 20260729 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 688000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 1877000000 | USD | 20260729 | Open filing evidence |
Wealth Solutions · Human Capital Segment · Operating Segments
Product Or Service · Statement Business Segments · Consolidation Items
Source dimensions
srt:ProductOrServiceAxis=aon:WealthSolutionsMember;us-gaap:StatementBusinessSegmentsAxis=aon:HumanCapitalSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 426000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 846000000 | USD | 20260729 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 519000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 1038000000 | USD | 20260729 | Open filing evidence |
Americas Other Than United States · Operating Segments · Human Capital Segment
Statement Geographical · Consolidation Items · Statement Business Segments
Source dimensions
srt:StatementGeographicalAxis=aon:AmericasOtherThanUnitedStatesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=aon:HumanCapitalSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 120000000 | USD | 20250425 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 381000000 | USD | 20250218 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 96000000 | USD | 20250425 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 351000000 | USD | 20250218 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 300000000 | USD | 20250218 | Open filing evidence |
Americas Other Than United States · Operating Segments · Risk Capital Segment
Statement Geographical · Consolidation Items · Statement Business Segments
Source dimensions
srt:StatementGeographicalAxis=aon:AmericasOtherThanUnitedStatesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=aon:RiskCapitalSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 254000000 | USD | 20250425 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 954000000 | USD | 20250218 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 227000000 | USD | 20250425 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 909000000 | USD | 20250218 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 837000000 | USD | 20250218 | Open filing evidence |
Americas Other Than United States · Human Capital Segment · Operating Segments
Statement Geographical · Statement Business Segments · Consolidation Items
Source dimensions
srt:StatementGeographicalAxis=aon:AmericasOtherThanUnitedStatesMember;us-gaap:StatementBusinessSegmentsAxis=aon:HumanCapitalSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 109000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 232000000 | USD | 20260729 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 110000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 230000000 | USD | 20260729 | Open filing evidence |
Americas Other Than United States · Risk Capital Segment · Operating Segments
Statement Geographical · Statement Business Segments · Consolidation Items
Source dimensions
srt:StatementGeographicalAxis=aon:AmericasOtherThanUnitedStatesMember;us-gaap:StatementBusinessSegmentsAxis=aon:RiskCapitalSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 299000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 560000000 | USD | 20260729 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 285000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 539000000 | USD | 20260729 | Open filing evidence |
Europe Middle East And Africa Other Than United Kingdom And Ireland · Operating Segments · Human Capital Segment
Statement Geographical · Consolidation Items · Statement Business Segments
Source dimensions
srt:StatementGeographicalAxis=aon:EuropeMiddleEastAndAfricaOtherThanUnitedKingdomAndIrelandMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=aon:HumanCapitalSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 316000000 | USD | 20250425 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 724000000 | USD | 20250218 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 281000000 | USD | 20250425 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 636000000 | USD | 20250218 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 566000000 | USD | 20250218 | Open filing evidence |
Europe Middle East And Africa Other Than United Kingdom And Ireland · Operating Segments · Risk Capital Segment
Statement Geographical · Consolidation Items · Statement Business Segments
Source dimensions
srt:StatementGeographicalAxis=aon:EuropeMiddleEastAndAfricaOtherThanUnitedKingdomAndIrelandMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=aon:RiskCapitalSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 946000000 | USD | 20250425 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 2176000000 | USD | 20250218 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 928000000 | USD | 20250425 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 2036000000 | USD | 20250218 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 1877000000 | USD | 20250218 | Open filing evidence |
Europe Middle East And Africa Other Than United Kingdom And Ireland · Human Capital Segment · Operating Segments
Statement Geographical · Statement Business Segments · Consolidation Items
Source dimensions
srt:StatementGeographicalAxis=aon:EuropeMiddleEastAndAfricaOtherThanUnitedKingdomAndIrelandMember;us-gaap:StatementBusinessSegmentsAxis=aon:HumanCapitalSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 185000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 555000000 | USD | 20260729 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 165000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 481000000 | USD | 20260729 | Open filing evidence |
Europe Middle East And Africa Other Than United Kingdom And Ireland · Risk Capital Segment · Operating Segments
Statement Geographical · Statement Business Segments · Consolidation Items
Source dimensions
srt:StatementGeographicalAxis=aon:EuropeMiddleEastAndAfricaOtherThanUnitedKingdomAndIrelandMember;us-gaap:StatementBusinessSegmentsAxis=aon:RiskCapitalSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 533000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 1652000000 | USD | 20260729 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 469000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 1415000000 | USD | 20260729 | Open filing evidence |
GB · Operating Segments · Human Capital Segment
Statement Geographical · Consolidation Items · Statement Business Segments
Source dimensions
srt:StatementGeographicalAxis=country:GB;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=aon:HumanCapitalSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 191000000 | USD | 20250425 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 709000000 | USD | 20250218 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 172000000 | USD | 20250425 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 633000000 | USD | 20250218 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 592000000 | USD | 20250218 | Open filing evidence |
GB · Operating Segments · Risk Capital Segment
Statement Geographical · Consolidation Items · Statement Business Segments
Source dimensions
srt:StatementGeographicalAxis=country:GB;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=aon:RiskCapitalSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 430000000 | USD | 20250425 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 1266000000 | USD | 20250218 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 411000000 | USD | 20250425 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 1186000000 | USD | 20250218 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 1068000000 | USD | 20250218 | Open filing evidence |
GB · Human Capital Segment · Operating Segments
Statement Geographical · Statement Business Segments · Consolidation Items
Source dimensions
srt:StatementGeographicalAxis=country:GB;us-gaap:StatementBusinessSegmentsAxis=aon:HumanCapitalSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 210000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 417000000 | USD | 20260729 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 199000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 390000000 | USD | 20260729 | Open filing evidence |
GB · Risk Capital Segment · Operating Segments
Statement Geographical · Statement Business Segments · Consolidation Items
Source dimensions
srt:StatementGeographicalAxis=country:GB;us-gaap:StatementBusinessSegmentsAxis=aon:RiskCapitalSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 422000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 904000000 | USD | 20260729 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 411000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 841000000 | USD | 20260729 | Open filing evidence |
IE · Operating Segments · Human Capital Segment
Statement Geographical · Consolidation Items · Statement Business Segments
Source dimensions
srt:StatementGeographicalAxis=country:IE;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=aon:HumanCapitalSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 23000000 | USD | 20250425 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 68000000 | USD | 20250218 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 17000000 | USD | 20250425 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 52000000 | USD | 20250218 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 46000000 | USD | 20250218 | Open filing evidence |
IE · Operating Segments · Risk Capital Segment
Statement Geographical · Consolidation Items · Statement Business Segments
Source dimensions
srt:StatementGeographicalAxis=country:IE;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=aon:RiskCapitalSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 22000000 | USD | 20250425 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 78000000 | USD | 20250218 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 16000000 | USD | 20250425 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 61000000 | USD | 20250218 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 53000000 | USD | 20250218 | Open filing evidence |
IE · Human Capital Segment · Operating Segments
Statement Geographical · Statement Business Segments · Consolidation Items
Source dimensions
srt:StatementGeographicalAxis=country:IE;us-gaap:StatementBusinessSegmentsAxis=aon:HumanCapitalSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 25000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 53000000 | USD | 20260729 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 22000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 45000000 | USD | 20260729 | Open filing evidence |
IE · Risk Capital Segment · Operating Segments
Statement Geographical · Statement Business Segments · Consolidation Items
Source dimensions
srt:StatementGeographicalAxis=country:IE;us-gaap:StatementBusinessSegmentsAxis=aon:RiskCapitalSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 22000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 47000000 | USD | 20260729 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 24000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 46000000 | USD | 20260729 | Open filing evidence |
US · Operating Segments · Human Capital Segment
Statement Geographical · Consolidation Items · Statement Business Segments
Source dimensions
srt:StatementGeographicalAxis=country:US;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=aon:HumanCapitalSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 788000000 | USD | 20250425 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 2997000000 | USD | 20250218 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 442000000 | USD | 20250425 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 1868000000 | USD | 20250218 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 1773000000 | USD | 20250218 | Open filing evidence |
US · Operating Segments · Risk Capital Segment
Statement Geographical · Consolidation Items · Statement Business Segments
Source dimensions
srt:StatementGeographicalAxis=country:US;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=aon:RiskCapitalSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 1221000000 | USD | 20250425 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 4697000000 | USD | 20250218 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 1078000000 | USD | 20250425 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 4067000000 | USD | 20250218 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 3910000000 | USD | 20250218 | Open filing evidence |
US · Human Capital Segment · Operating Segments
Statement Geographical · Statement Business Segments · Consolidation Items
Source dimensions
srt:StatementGeographicalAxis=country:US;us-gaap:StatementBusinessSegmentsAxis=aon:HumanCapitalSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 632000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 1323000000 | USD | 20260729 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 718000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 1506000000 | USD | 20260729 | Open filing evidence |
US · Risk Capital Segment · Operating Segments
Statement Geographical · Statement Business Segments · Consolidation Items
Source dimensions
srt:StatementGeographicalAxis=country:US;us-gaap:StatementBusinessSegmentsAxis=aon:RiskCapitalSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 1392000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 2718000000 | USD | 20260729 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 1324000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 2545000000 | USD | 20260729 | Open filing evidence |
Asia Pacific · Operating Segments · Human Capital Segment
Statement Geographical · Consolidation Items · Statement Business Segments
Source dimensions
srt:StatementGeographicalAxis=srt:AsiaPacificMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=aon:HumanCapitalSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 107000000 | USD | 20250425 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 330000000 | USD | 20250218 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 95000000 | USD | 20250425 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 324000000 | USD | 20250218 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 314000000 | USD | 20250218 | Open filing evidence |
Asia Pacific · Operating Segments · Risk Capital Segment
Statement Geographical · Consolidation Items · Statement Business Segments
Source dimensions
srt:StatementGeographicalAxis=srt:AsiaPacificMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=aon:RiskCapitalSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2025-01-01 – 2025-03-31 | 318000000 | USD | 20250425 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 1346000000 | USD | 20250218 | Open filing evidence |
| 2024-01-01 – 2024-03-31 | 315000000 | USD | 20250425 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 1265000000 | USD | 20250218 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 1160000000 | USD | 20250218 | Open filing evidence |
Asia Pacific · Human Capital Segment · Operating Segments
Statement Geographical · Statement Business Segments · Consolidation Items
Source dimensions
srt:StatementGeographicalAxis=srt:AsiaPacificMember;us-gaap:StatementBusinessSegmentsAxis=aon:HumanCapitalSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 83000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 203000000 | USD | 20260729 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 77000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 184000000 | USD | 20260729 | Open filing evidence |
Asia Pacific · Risk Capital Segment · Operating Segments
Statement Geographical · Statement Business Segments · Consolidation Items
Source dimensions
srt:StatementGeographicalAxis=srt:AsiaPacificMember;us-gaap:StatementBusinessSegmentsAxis=aon:RiskCapitalSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 338000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 627000000 | USD | 20260729 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 353000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 671000000 | USD | 20260729 | Open filing evidence |
Operating Segments · Consulting
Consolidation Items · Statement Business Segments
Source dimensions
us-gaap:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=aon:ConsultingMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2016-01-01 – 2016-12-31 | 4183000000 | USD | 2017-02-23 · 21:32:21.000Z | Open filing evidence |
| 2016-07-01 – 2016-09-30 | 1041000000 | USD | 20161028 | Open filing evidence |
| 2016-01-01 – 2016-09-30 | 2902000000 | USD | 20161028 | Open filing evidence |
| 2016-04-01 – 2016-06-30 | 931000000 | USD | 20160729 | Open filing evidence |
| 2016-01-01 – 2016-06-30 | 1861000000 | USD | 20160729 | Open filing evidence |
| 2016-01-01 – 2016-03-31 | 930000000 | USD | 20160429 | Open filing evidence |
| 2015-01-01 – 2015-12-31 | 4303000000 | USD | 2017-02-23 · 21:32:21.000Z | Open filing evidence |
| 2015-07-01 – 2015-09-30 | 1064000000 | USD | 20161028 | Open filing evidence |
| 2015-01-01 – 2015-09-30 | 3013000000 | USD | 20161028 | Open filing evidence |
| 2015-04-01 – 2015-06-30 | 979000000 | USD | 20160729 | Open filing evidence |
| 2015-01-01 – 2015-06-30 | 1949000000 | USD | 20160729 | Open filing evidence |
| 2015-01-01 – 2015-03-31 | 970000000 | USD | 20160429 | Open filing evidence |
| 2014-01-01 – 2014-12-31 | 4264000000 | USD | 2017-02-23 · 21:32:21.000Z | Open filing evidence |
| 2013-01-01 – 2013-12-31 | 4057000000 | USD | 20160222 | Open filing evidence |
Operating Segments · Risk And Insurance Brokerage Services
Consolidation Items · Statement Business Segments
Source dimensions
us-gaap:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=aon:RiskAndInsuranceBrokerageServicesMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2016-01-01 – 2016-12-31 | 7485000000 | USD | 2017-02-23 · 21:32:21.000Z | Open filing evidence |
| 2016-07-01 – 2016-09-30 | 1715000000 | USD | 20161028 | Open filing evidence |
| 2016-01-01 – 2016-09-30 | 5434000000 | USD | 20161028 | Open filing evidence |
| 2016-04-01 – 2016-06-30 | 1847000000 | USD | 20160729 | Open filing evidence |
| 2016-01-01 – 2016-06-30 | 3719000000 | USD | 20160729 | Open filing evidence |
| 2016-01-01 – 2016-03-31 | 1872000000 | USD | 20160429 | Open filing evidence |
| 2015-01-01 – 2015-12-31 | 7426000000 | USD | 2017-02-23 · 21:32:21.000Z | Open filing evidence |
| 2015-07-01 – 2015-09-30 | 1689000000 | USD | 20161028 | Open filing evidence |
| 2015-01-01 – 2015-09-30 | 5417000000 | USD | 20161028 | Open filing evidence |
| 2015-04-01 – 2015-06-30 | 1833000000 | USD | 20160729 | Open filing evidence |
| 2015-01-01 – 2015-06-30 | 3728000000 | USD | 20160729 | Open filing evidence |
| 2015-01-01 – 2015-03-31 | 1895000000 | USD | 20160429 | Open filing evidence |
| 2014-01-01 – 2014-12-31 | 7834000000 | USD | 2017-02-23 · 21:32:21.000Z | Open filing evidence |
| 2013-01-01 – 2013-12-31 | 7789000000 | USD | 20160222 | Open filing evidence |
Consulting
Statement Business Segments
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=aon:ConsultingMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2015-07-01 – 2015-09-30 | 1064000000 | USD | 20151030 | Open filing evidence |
| 2015-01-01 – 2015-09-30 | 3013000000 | USD | 20151030 | Open filing evidence |
| 2015-04-01 – 2015-06-30 | 979000000 | USD | 20150731 | Open filing evidence |
| 2015-01-01 – 2015-06-30 | 1949000000 | USD | 20150731 | Open filing evidence |
| 2015-01-01 – 2015-03-31 | 970000000 | USD | 20150501 | Open filing evidence |
| 2014-01-01 – 2014-12-31 | 4264000000 | USD | 20150224 | Open filing evidence |
| 2014-07-01 – 2014-09-30 | 1057000000 | USD | 20151030 | Open filing evidence |
| 2014-01-01 – 2014-09-30 | 3004000000 | USD | 20151030 | Open filing evidence |
| 2014-04-01 – 2014-06-30 | 982000000 | USD | 20150731 | Open filing evidence |
| 2014-01-01 – 2014-06-30 | 1947000000 | USD | 20150731 | Open filing evidence |
| 2014-01-01 – 2014-03-31 | 965000000 | USD | 20150501 | Open filing evidence |
| 2013-01-01 – 2013-12-31 | 4057000000 | USD | 20150224 | Open filing evidence |
| 2013-07-01 – 2013-09-30 | 981000000 | USD | 20141031 | Open filing evidence |
| 2013-01-01 – 2013-09-30 | 2891000000 | USD | 20141031 | Open filing evidence |
| 2013-04-01 – 2013-06-30 | 956000000 | USD | 20140725 | Open filing evidence |
| 2013-01-01 – 2013-06-30 | 1910000000 | USD | 20140725 | Open filing evidence |
| 2013-01-01 – 2013-03-31 | 954000000 | USD | 20140425 | Open filing evidence |
| 2012-01-01 – 2012-12-31 | 3925000000 | USD | 20150224 | Open filing evidence |
| 2012-07-01 – 2012-09-30 | 971000000 | USD | 20131025 | Open filing evidence |
| 2012-01-01 – 2012-09-30 | 2847000000 | USD | 20131025 | Open filing evidence |
| 2012-04-01 – 2012-06-30 | 931000000 | USD | 20130726 | Open filing evidence |
| 2012-01-01 – 2012-06-30 | 1876000000 | USD | 20130726 | Open filing evidence |
| 2012-01-01 – 2012-03-31 | 945000000 | USD | 20130501 | Open filing evidence |
| 2011-01-01 – 2011-12-31 | 3781000000 Restated | USD | 20140218 | Open filing evidence |
| 2011-07-01 – 2011-09-30 | 957000000 Restated | USD | 20121031 | Open filing evidence |
| 2011-01-01 – 2011-09-30 | 2778000000 Restated | USD | 20121031 | Open filing evidence |
| 2011-04-01 – 2011-06-30 | 906000000 Restated | USD | 20120808 | Open filing evidence |
| 2011-01-01 – 2011-06-30 | 1821000000 Restated | USD | 20120808 | Open filing evidence |
| 2011-01-01 – 2011-03-31 | 915000000 Restated | USD | 20120508 | Open filing evidence |
| 2010-01-01 – 2010-12-31 | 1545000000 Restated | USD | 20130222 | Open filing evidence |
| 2010-07-01 – 2010-09-30 | 321000000 | USD | 20111104 | Open filing evidence |
| 2010-01-01 – 2010-09-30 | 960000000 | USD | 20111104 | Open filing evidence |
| 2010-04-01 – 2010-06-30 | 317000000 | USD | 20110804 | Open filing evidence |
| 2010-01-01 – 2010-06-30 | 639000000 | USD | 20110804 | Open filing evidence |
| 2010-01-01 – 2010-03-31 | 322000000 | USD | 20110505 | Open filing evidence |
| 2009-01-01 – 2009-12-31 | 1267000000 | USD | 20120224 | Open filing evidence |
| 2009-07-01 – 2009-09-30 | 308000000 | USD | 20101104 | Open filing evidence |
| 2009-01-01 – 2009-09-30 | 917000000 | USD | 20101104 | Open filing evidence |
| 2009-04-01 – 2009-06-30 | 300000000 | USD | 20100806 | Open filing evidence |
| 2009-01-01 – 2009-06-30 | 609000000 | USD | 20100806 | Open filing evidence |
| 2008-01-01 – 2008-12-31 | 1356000000 | USD | 20110225 | Open filing evidence |
Human Capital Segment · Intersegment Elimination
Statement Business Segments · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=aon:HumanCapitalSegmentMember;srt:ConsolidationItemsAxis=us-gaap:IntersegmentEliminationMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-07-01 – 2026-09-30 | -2000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2026-01-01 – 2026-09-30 | -8000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | -3000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | -7000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
Human Capital Segment · Operating Segments
Statement Business Segments · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=aon:HumanCapitalSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-07-01 – 2026-09-30 | 1421000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2026-01-01 – 2026-09-30 | 4204000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 1475000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 4311000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
Human Capital Segment · Health Solutions · Operating Segments
Statement Business Segments · Product Or Service · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=aon:HumanCapitalSegmentMember;srt:ProductOrServiceAxis=aon:HealthSolutionsMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-07-01 – 2026-09-30 | 992000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2026-01-01 – 2026-09-30 | 2929000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 935000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 2733000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
Human Capital Segment · Wealth Solutions · Operating Segments
Statement Business Segments · Product Or Service · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=aon:HumanCapitalSegmentMember;srt:ProductOrServiceAxis=aon:WealthSolutionsMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-07-01 – 2026-09-30 | 429000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2026-01-01 – 2026-09-30 | 1275000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 540000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 1578000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
Human Capital Segment · Americas Other Than United States · Operating Segments
Statement Business Segments · Statement Geographical · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=aon:HumanCapitalSegmentMember;srt:StatementGeographicalAxis=aon:AmericasOtherThanUnitedStatesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-07-01 – 2026-09-30 | 121000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2026-01-01 – 2026-09-30 | 353000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 121000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 351000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
Human Capital Segment · Europe Middle East And Africa Other Than United Kingdom And Ireland · Operating Segments
Statement Business Segments · Statement Geographical · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=aon:HumanCapitalSegmentMember;srt:StatementGeographicalAxis=aon:EuropeMiddleEastAndAfricaOtherThanUnitedKingdomAndIrelandMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-07-01 – 2026-09-30 | 163000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2026-01-01 – 2026-09-30 | 718000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 155000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 636000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
Human Capital Segment · GB · Operating Segments
Statement Business Segments · Statement Geographical · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=aon:HumanCapitalSegmentMember;srt:StatementGeographicalAxis=country:GB;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-07-01 – 2026-09-30 | 224000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2026-01-01 – 2026-09-30 | 641000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 222000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 612000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
Human Capital Segment · IE · Operating Segments
Statement Business Segments · Statement Geographical · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=aon:HumanCapitalSegmentMember;srt:StatementGeographicalAxis=country:IE;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-07-01 – 2026-09-30 | 25000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2026-01-01 – 2026-09-30 | 78000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 21000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 66000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
Human Capital Segment · US · Operating Segments
Statement Business Segments · Statement Geographical · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=aon:HumanCapitalSegmentMember;srt:StatementGeographicalAxis=country:US;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-07-01 – 2026-09-30 | 785000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2026-01-01 – 2026-09-30 | 2108000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 858000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 2364000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
Human Capital Segment · Asia Pacific · Operating Segments
Statement Business Segments · Statement Geographical · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=aon:HumanCapitalSegmentMember;srt:StatementGeographicalAxis=srt:AsiaPacificMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-07-01 – 2026-09-30 | 103000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2026-01-01 – 2026-09-30 | 306000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 98000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 282000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
Operating Segments
Statement Business Segments
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=aon:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2010-01-01 – 2010-12-31 | 8512000000 | USD | 20110225 | Open filing evidence |
| 2010-07-01 – 2010-09-30 | 1801000000 | USD | 20101104 | Open filing evidence |
| 2010-01-01 – 2010-09-30 | 5603000000 | USD | 20101104 | Open filing evidence |
| 2010-04-01 – 2010-06-30 | 1898000000 | USD | 20100806 | Open filing evidence |
| 2010-01-01 – 2010-06-30 | 3802000000 | USD | 20100806 | Open filing evidence |
| 2009-01-01 – 2009-12-31 | 7546000000 | USD | 20110225 | Open filing evidence |
| 2009-07-01 – 2009-09-30 | 1785000000 | USD | 20101104 | Open filing evidence |
| 2009-01-01 – 2009-09-30 | 5502000000 | USD | 20101104 | Open filing evidence |
| 2009-04-01 – 2009-06-30 | 1871000000 | USD | 20100806 | Open filing evidence |
| 2009-01-01 – 2009-06-30 | 3717000000 | USD | 20100806 | Open filing evidence |
Risk And Insurance Brokerage Services
Statement Business Segments
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=aon:RiskAndInsuranceBrokerageServicesMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2015-07-01 – 2015-09-30 | 1689000000 | USD | 20151030 | Open filing evidence |
| 2015-01-01 – 2015-09-30 | 5417000000 | USD | 20151030 | Open filing evidence |
| 2015-04-01 – 2015-06-30 | 1833000000 | USD | 20150731 | Open filing evidence |
| 2015-01-01 – 2015-06-30 | 3728000000 | USD | 20150731 | Open filing evidence |
| 2015-01-01 – 2015-03-31 | 1895000000 | USD | 20150501 | Open filing evidence |
| 2014-01-01 – 2014-12-31 | 7834000000 | USD | 20150224 | Open filing evidence |
| 2014-07-01 – 2014-09-30 | 1836000000 | USD | 20151030 | Open filing evidence |
| 2014-01-01 – 2014-09-30 | 5778000000 | USD | 20151030 | Open filing evidence |
| 2014-04-01 – 2014-06-30 | 1948000000 | USD | 20150731 | Open filing evidence |
| 2014-01-01 – 2014-06-30 | 3942000000 | USD | 20150731 | Open filing evidence |
| 2014-01-01 – 2014-03-31 | 1994000000 | USD | 20150501 | Open filing evidence |
| 2013-01-01 – 2013-12-31 | 7789000000 | USD | 20150224 | Open filing evidence |
| 2013-07-01 – 2013-09-30 | 1821000000 | USD | 20141031 | Open filing evidence |
| 2013-01-01 – 2013-09-30 | 5736000000 | USD | 20141031 | Open filing evidence |
| 2013-04-01 – 2013-06-30 | 1944000000 | USD | 20140725 | Open filing evidence |
| 2013-01-01 – 2013-06-30 | 3915000000 | USD | 20140725 | Open filing evidence |
| 2013-01-01 – 2013-03-31 | 1971000000 | USD | 20140425 | Open filing evidence |
| 2012-01-01 – 2012-12-31 | 7632000000 | USD | 20150224 | Open filing evidence |
| 2012-07-01 – 2012-09-30 | 1778000000 | USD | 20131025 | Open filing evidence |
| 2012-01-01 – 2012-09-30 | 5582000000 | USD | 20131025 | Open filing evidence |
| 2012-04-01 – 2012-06-30 | 1899000000 | USD | 20130726 | Open filing evidence |
| 2012-01-01 – 2012-06-30 | 3804000000 | USD | 20130726 | Open filing evidence |
| 2012-01-01 – 2012-03-31 | 1905000000 | USD | 20130501 | Open filing evidence |
| 2011-01-01 – 2011-12-31 | 7537000000 Restated | USD | 20140218 | Open filing evidence |
| 2011-07-01 – 2011-09-30 | 1772000000 Restated | USD | 20121031 | Open filing evidence |
| 2011-01-01 – 2011-09-30 | 5535000000 Restated | USD | 20121031 | Open filing evidence |
| 2011-04-01 – 2011-06-30 | 1912000000 Restated | USD | 20120808 | Open filing evidence |
| 2011-01-01 – 2011-06-30 | 3763000000 Restated | USD | 20120808 | Open filing evidence |
| 2011-01-01 – 2011-03-31 | 1851000000 Restated | USD | 20120508 | Open filing evidence |
| 2010-01-01 – 2010-12-31 | 6989000000 Restated | USD | 20130222 | Open filing evidence |
| 2010-07-01 – 2010-09-30 | 1484000000 | USD | 20111104 | Open filing evidence |
| 2010-01-01 – 2010-09-30 | 4658000000 | USD | 20111104 | Open filing evidence |
| 2010-04-01 – 2010-06-30 | 1587000000 | USD | 20110804 | Open filing evidence |
| 2010-01-01 – 2010-06-30 | 3174000000 | USD | 20110804 | Open filing evidence |
| 2010-01-01 – 2010-03-31 | 1587000000 | USD | 20110505 | Open filing evidence |
| 2009-01-01 – 2009-12-31 | 6305000000 | USD | 20120224 | Open filing evidence |
| 2009-07-01 – 2009-09-30 | 1485000000 | USD | 20101104 | Open filing evidence |
| 2009-01-01 – 2009-09-30 | 4605000000 | USD | 20101104 | Open filing evidence |
| 2009-04-01 – 2009-06-30 | 1577000000 | USD | 20100806 | Open filing evidence |
| 2009-01-01 – 2009-06-30 | 3120000000 | USD | 20100806 | Open filing evidence |
Risk Capital Segment · Intersegment Elimination
Statement Business Segments · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=aon:RiskCapitalSegmentMember;srt:ConsolidationItemsAxis=us-gaap:IntersegmentEliminationMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-07-01 – 2026-09-30 | 0 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2026-01-01 – 2026-09-30 | -5000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 0 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | -5000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
Risk Capital Segment · Operating Segments
Statement Business Segments · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=aon:RiskCapitalSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-07-01 – 2026-09-30 | 2682000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2026-01-01 – 2026-09-30 | 9190000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 2525000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 8582000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
Risk Capital Segment · Commercial Risk Solutions · Operating Segments
Statement Business Segments · Product Or Service · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=aon:RiskCapitalSegmentMember;srt:ProductOrServiceAxis=aon:CommercialRiskSolutionsMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-07-01 – 2026-09-30 | 2110000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2026-01-01 – 2026-09-30 | 6628000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 1988000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 6168000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
Risk Capital Segment · Reinsurance Solutions · Operating Segments
Statement Business Segments · Product Or Service · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=aon:RiskCapitalSegmentMember;srt:ProductOrServiceAxis=aon:ReinsuranceSolutionsMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-07-01 – 2026-09-30 | 572000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2026-01-01 – 2026-09-30 | 2562000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 537000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 2414000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
Risk Capital Segment · Americas Other Than United States · Operating Segments
Statement Business Segments · Statement Geographical · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=aon:RiskCapitalSegmentMember;srt:StatementGeographicalAxis=aon:AmericasOtherThanUnitedStatesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-07-01 – 2026-09-30 | 263000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2026-01-01 – 2026-09-30 | 823000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 260000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 799000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
Risk Capital Segment · Europe Middle East And Africa Other Than United Kingdom And Ireland · Operating Segments
Statement Business Segments · Statement Geographical · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=aon:RiskCapitalSegmentMember;srt:StatementGeographicalAxis=aon:EuropeMiddleEastAndAfricaOtherThanUnitedKingdomAndIrelandMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-07-01 – 2026-09-30 | 443000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2026-01-01 – 2026-09-30 | 2095000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 400000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 1815000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
Risk Capital Segment · GB · Operating Segments
Statement Business Segments · Statement Geographical · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=aon:RiskCapitalSegmentMember;srt:StatementGeographicalAxis=country:GB;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-07-01 – 2026-09-30 | 302000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2026-01-01 – 2026-09-30 | 1206000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 303000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 1144000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
Risk Capital Segment · IE · Operating Segments
Statement Business Segments · Statement Geographical · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=aon:RiskCapitalSegmentMember;srt:StatementGeographicalAxis=country:IE;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-07-01 – 2026-09-30 | 21000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2026-01-01 – 2026-09-30 | 68000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 21000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 67000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
Risk Capital Segment · US · Operating Segments
Statement Business Segments · Statement Geographical · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=aon:RiskCapitalSegmentMember;srt:StatementGeographicalAxis=country:US;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-07-01 – 2026-09-30 | 1353000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2026-01-01 – 2026-09-30 | 4071000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 1229000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 3774000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
Risk Capital Segment · Asia Pacific · Operating Segments
Statement Business Segments · Statement Geographical · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=aon:RiskCapitalSegmentMember;srt:StatementGeographicalAxis=srt:AsiaPacificMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-07-01 – 2026-09-30 | 300000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2026-01-01 – 2026-09-30 | 927000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 312000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 983000000 | USD | 2026-10-28 · 20:05:59.000Z | Open filing evidence |
Unallocated Revenue To Segment
Statement Business Segments
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=aon:UnallocatedRevenueToSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2009-01-01 – 2009-12-31 | 49000000 | USD | 20110225 | Open filing evidence |
| 2009-07-01 – 2009-09-30 | 9000000 | USD | 20101104 | Open filing evidence |
| 2009-01-01 – 2009-09-30 | 20000000 | USD | 20101104 | Open filing evidence |
| 2009-04-01 – 2009-06-30 | 11000000 | USD | 20100806 | Open filing evidence |
| 2009-01-01 – 2009-06-30 | 11000000 | USD | 20100806 | Open filing evidence |
Business Intersegment Eliminations
Statement Business Segments
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=us-gaap:BusinessIntersegmentEliminationsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2011-07-01 – 2011-09-30 | -6000000 | USD | 20111104 | Open filing evidence |
| 2011-01-01 – 2011-09-30 | -20000000 | USD | 20111104 | Open filing evidence |
| 2011-04-01 – 2011-06-30 | -7000000 | USD | 20110804 | Open filing evidence |
| 2011-01-01 – 2011-06-30 | -14000000 | USD | 20110804 | Open filing evidence |
| 2011-01-01 – 2011-03-31 | -7000000 | USD | 20110505 | Open filing evidence |
| 2010-01-01 – 2010-12-31 | -22000000 | USD | 20110225 | Open filing evidence |
| 2010-07-01 – 2010-09-30 | -4000000 | USD | 20111104 | Open filing evidence |
| 2010-01-01 – 2010-09-30 | -15000000 | USD | 20111104 | Open filing evidence |
| 2010-04-01 – 2010-06-30 | -6000000 | USD | 20110804 | Open filing evidence |
| 2010-01-01 – 2010-06-30 | -11000000 | USD | 20110804 | Open filing evidence |
| 2010-01-01 – 2010-03-31 | -5000000 | USD | 20110505 | Open filing evidence |
| 2009-01-01 – 2009-12-31 | -26000000 | USD | 20110225 | Open filing evidence |
| 2009-07-01 – 2009-09-30 | -8000000 | USD | 20101104 | Open filing evidence |
| 2009-01-01 – 2009-09-30 | -20000000 | USD | 20101104 | Open filing evidence |
| 2009-04-01 – 2009-06-30 | -6000000 | USD | 20100806 | Open filing evidence |
| 2009-01-01 – 2009-06-30 | -12000000 | USD | 20100806 | Open filing evidence |
Intersegment Elimination
Statement Business Segments
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=us-gaap:IntersegmentEliminationMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2015-07-01 – 2015-09-30 | -11000000 | USD | 20151030 | Open filing evidence |
| 2015-01-01 – 2015-09-30 | -36000000 | USD | 20151030 | Open filing evidence |
| 2015-04-01 – 2015-06-30 | -7000000 | USD | 20150731 | Open filing evidence |
| 2015-01-01 – 2015-06-30 | -25000000 | USD | 20150731 | Open filing evidence |
| 2015-01-01 – 2015-03-31 | -18000000 | USD | 20150501 | Open filing evidence |
| 2014-01-01 – 2014-12-31 | -53000000 | USD | 20150224 | Open filing evidence |
| 2014-07-01 – 2014-09-30 | -13000000 | USD | 20151030 | Open filing evidence |
| 2014-01-01 – 2014-09-30 | -36000000 | USD | 20151030 | Open filing evidence |
| 2014-04-01 – 2014-06-30 | -11000000 | USD | 20150731 | Open filing evidence |
| 2014-01-01 – 2014-06-30 | -23000000 | USD | 20150731 | Open filing evidence |
| 2014-01-01 – 2014-03-31 | -12000000 | USD | 20150501 | Open filing evidence |
| 2013-01-01 – 2013-12-31 | -31000000 | USD | 20150224 | Open filing evidence |
| 2013-07-01 – 2013-09-30 | -8000000 | USD | 20141031 | Open filing evidence |
| 2013-01-01 – 2013-09-30 | -21000000 | USD | 20141031 | Open filing evidence |
| 2013-04-01 – 2013-06-30 | -3000000 | USD | 20140725 | Open filing evidence |
| 2013-01-01 – 2013-06-30 | -13000000 | USD | 20140725 | Open filing evidence |
| 2013-01-01 – 2013-03-31 | -10000000 | USD | 20140425 | Open filing evidence |
| 2012-01-01 – 2012-12-31 | -43000000 | USD | 20150224 | Open filing evidence |
| 2012-07-01 – 2012-09-30 | -12000000 | USD | 20131025 | Open filing evidence |
| 2012-01-01 – 2012-09-30 | -30000000 | USD | 20131025 | Open filing evidence |
| 2012-04-01 – 2012-06-30 | -9000000 | USD | 20130726 | Open filing evidence |
| 2012-01-01 – 2012-06-30 | -18000000 | USD | 20130726 | Open filing evidence |
| 2012-01-01 – 2012-03-31 | -9000000 | USD | 20130501 | Open filing evidence |
| 2011-01-01 – 2011-12-31 | -31000000 | USD | 20140218 | Open filing evidence |
| 2011-07-01 – 2011-09-30 | -6000000 | USD | 20121031 | Open filing evidence |
| 2011-01-01 – 2011-09-30 | -20000000 | USD | 20121031 | Open filing evidence |
| 2011-04-01 – 2011-06-30 | -7000000 | USD | 20120808 | Open filing evidence |
| 2011-01-01 – 2011-06-30 | -14000000 | USD | 20120808 | Open filing evidence |
| 2011-01-01 – 2011-03-31 | -7000000 | USD | 20120508 | Open filing evidence |
| 2010-01-01 – 2010-12-31 | -22000000 | USD | 20130222 | Open filing evidence |
| 2009-01-01 – 2009-12-31 | -26000000 | USD | 20120224 | Open filing evidence |
Operating Segments
Statement Business Segments
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2014-01-01 – 2014-12-31 | 12045000000 | USD | 20150224 | Open filing evidence |
| 2013-01-01 – 2013-12-31 | 11815000000 | USD | 20150224 | Open filing evidence |
| 2012-01-01 – 2012-12-31 | 11514000000 | USD | 20150224 | Open filing evidence |
| 2012-01-01 – 2012-03-31 | 2841000000 | USD | 20120508 | Open filing evidence |
| 2011-01-01 – 2011-12-31 | 11287000000 | USD | 20140218 | Open filing evidence |
| 2011-01-01 – 2011-03-31 | 2759000000 | USD | 20120508 | Open filing evidence |
| 2010-01-01 – 2010-12-31 | 8512000000 | USD | 20130222 | Open filing evidence |
| 2009-01-01 – 2009-12-31 | 7546000000 | USD | 20120224 | Open filing evidence |
Unallocated Amount To Segment
Statement Business Segments
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=us-gaap:UnallocatedAmountToSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2009-01-01 – 2009-12-31 | 49000000 | USD | 20120224 | Open filing evidence |
Segment Restructuring · Consulting
Subsequent Event Type · Statement Business Segments
Source dimensions
us-gaap:SubsequentEventTypeAxis=aon:SegmentRestructuringMember;us-gaap:StatementBusinessSegmentsAxis=aon:ConsultingMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2011-01-01 – 2011-12-31 | 3781000000 | USD | 20120224 | Open filing evidence |
| 2010-01-01 – 2010-12-31 | 1545000000 | USD | 20120224 | Open filing evidence |
| 2009-01-01 – 2009-12-31 | 737000000 | USD | 20120224 | Open filing evidence |
Segment Restructuring · Risk And Insurance Brokerage Services
Subsequent Event Type · Statement Business Segments
Source dimensions
us-gaap:SubsequentEventTypeAxis=aon:SegmentRestructuringMember;us-gaap:StatementBusinessSegmentsAxis=aon:RiskAndInsuranceBrokerageServicesMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2011-01-01 – 2011-12-31 | 7537000000 | USD | 20120224 | Open filing evidence |
| 2010-01-01 – 2010-12-31 | 6989000000 | USD | 20120224 | Open filing evidence |
| 2009-01-01 – 2009-12-31 | 6835000000 | USD | 20120224 | Open filing evidence |
Segment Restructuring · Intersegment Elimination
Subsequent Event Type · Statement Business Segments
Source dimensions
us-gaap:SubsequentEventTypeAxis=aon:SegmentRestructuringMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:IntersegmentEliminationMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2011-01-01 – 2011-12-31 | -31000000 | USD | 20120224 | Open filing evidence |
| 2010-01-01 – 2010-12-31 | -22000000 | USD | 20120224 | Open filing evidence |
| 2009-01-01 – 2009-12-31 | -26000000 | USD | 20120224 | Open filing evidence |
Segment Restructuring · Operating Segments
Subsequent Event Type · Statement Business Segments
Source dimensions
us-gaap:SubsequentEventTypeAxis=aon:SegmentRestructuringMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2011-01-01 – 2011-12-31 | 11287000000 | USD | 20120224 | Open filing evidence |
| 2010-01-01 – 2010-12-31 | 8512000000 | USD | 20120224 | Open filing evidence |
| 2009-01-01 – 2009-12-31 | 7546000000 | USD | 20120224 | Open filing evidence |
Segment Restructuring · Unallocated Amount To Segment
Subsequent Event Type · Statement Business Segments
Source dimensions
us-gaap:SubsequentEventTypeAxis=aon:SegmentRestructuringMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:UnallocatedAmountToSegmentMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2009-01-01 – 2009-12-31 | 49000000 | USD | 20120224 | Open filing evidence |