Fundies. English
Segment disclosures
Company overviewAmerican Water Works Company, Inc.
Each reported dimension combination stays separate. Revenue and operating income are shown as reported, with their dates and sources.
Revenue · Reported segment facts
96 dimension combinations 474 retained observations 29 reported periods
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.
Operating Segments · Miscellaneous Utility Charge · Regulated Business
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=awk:MiscellaneousUtilityChargeMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 12000000 | USD | 20260429 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 49000000 | USD | 20260218 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 13000000 | USD | 20251029 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 38000000 | USD | 20251029 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 14000000 | USD | 20250730 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 25000000 | USD | 20250730 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 11000000 | USD | 20260429 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 42000000 | USD | 20260218 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 14000000 | USD | 20251029 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 33000000 | USD | 20251029 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 10000000 | USD | 20250730 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 19000000 | USD | 20250730 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 35000000 | USD | 20260218 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 36000000 | USD | 20250219 | Open filing evidence |
Operating Segments · Wastewater Services · Commercial · Regulated Business
Consolidation Items · Product Or Service · Major Customers · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=awk:WastewaterServicesMember;srt:MajorCustomersAxis=awk:CommercialMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 22000000 | USD | 20260429 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 86000000 | USD | 20260218 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 25000000 | USD | 20251029 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 64000000 | USD | 20251029 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 21000000 | USD | 20250730 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 39000000 | USD | 20250730 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 18000000 | USD | 20260429 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 70000000 | USD | 20260218 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 20000000 | USD | 20251029 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 52000000 | USD | 20251029 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 16000000 | USD | 20250730 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 32000000 | USD | 20250730 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 62000000 | USD | 20260218 | Open filing evidence |
Operating Segments · Wastewater Services · Industrial · Regulated Business
Consolidation Items · Product Or Service · Major Customers · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=awk:WastewaterServicesMember;srt:MajorCustomersAxis=awk:IndustrialMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 2000000 | USD | 20260429 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 10000000 | USD | 20260218 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 7000000 | USD | 20251029 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 17000000 | USD | 20251029 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 5000000 | USD | 20250730 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 10000000 | USD | 20250730 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 5000000 | USD | 20260429 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 12000000 | USD | 20260218 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 4000000 | USD | 20251029 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 9000000 | USD | 20251029 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 3000000 | USD | 20250730 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 5000000 | USD | 20250730 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 8000000 | USD | 20260218 | Open filing evidence |
Operating Segments · Wastewater Services · Publicand Other · Regulated Business
Consolidation Items · Product Or Service · Major Customers · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=awk:WastewaterServicesMember;srt:MajorCustomersAxis=awk:PublicandOtherMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 9000000 | USD | 20260429 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 39000000 | USD | 20260218 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 6000000 | USD | 20251029 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 21000000 | USD | 20251029 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 10000000 | USD | 20250730 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 20000000 | USD | 20250730 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 10000000 | USD | 20260429 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 36000000 | USD | 20260218 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 11000000 | USD | 20251029 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 28000000 | USD | 20251029 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 9000000 | USD | 20250730 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 17000000 | USD | 20250730 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 29000000 | USD | 20260218 | Open filing evidence |
Operating Segments · Wastewater Services · Residential · Regulated Business
Consolidation Items · Product Or Service · Major Customers · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=awk:WastewaterServicesMember;srt:MajorCustomersAxis=awk:ResidentialMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 74000000 | USD | 20260429 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 287000000 | USD | 20260218 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 75000000 | USD | 20251029 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 214000000 | USD | 20251029 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 71000000 | USD | 20250730 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 139000000 | USD | 20250730 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 68000000 | USD | 20260429 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 243000000 | USD | 20260218 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 61000000 | USD | 20251029 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 180000000 | USD | 20251029 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 60000000 | USD | 20250730 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 119000000 | USD | 20250730 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 228000000 | USD | 20260218 | Open filing evidence |
Operating Segments · Wastewater Services · Regulated Business
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=awk:WastewaterServicesMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 107000000 | USD | 20260429 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 422000000 | USD | 20260218 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 113000000 | USD | 20251029 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 316000000 | USD | 20251029 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 107000000 | USD | 20250730 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 208000000 | USD | 20250730 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 101000000 | USD | 20260429 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 361000000 | USD | 20260218 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 96000000 | USD | 20251029 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 269000000 | USD | 20251029 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 88000000 | USD | 20250730 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 173000000 | USD | 20250730 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 327000000 | USD | 20260218 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 241000000 | USD | 20250219 | Open filing evidence |
Operating Segments · Water Services · Commercial · Regulated Business
Consolidation Items · Product Or Service · Major Customers · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=awk:WaterServicesMember;srt:MajorCustomersAxis=awk:CommercialMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 229000000 | USD | 20260429 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 981000000 | USD | 20260218 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 287000000 | USD | 20251029 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 742000000 | USD | 20251029 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 243000000 | USD | 20250730 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 455000000 | USD | 20250730 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 212000000 | USD | 20260429 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 881000000 | USD | 20260218 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 253000000 | USD | 20251029 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 656000000 | USD | 20251029 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 216000000 | USD | 20250730 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 403000000 | USD | 20250730 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 798000000 | USD | 20260218 | Open filing evidence |
Operating Segments · Water Services · Fire Service · Regulated Business
Consolidation Items · Product Or Service · Major Customers · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=awk:WaterServicesMember;srt:MajorCustomersAxis=awk:FireServiceMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 48000000 | USD | 20260429 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 189000000 | USD | 20260218 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 46000000 | USD | 20251029 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 139000000 | USD | 20251029 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 48000000 | USD | 20250730 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 93000000 | USD | 20250730 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 45000000 | USD | 20260429 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 164000000 | USD | 20260218 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 41000000 | USD | 20251029 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 123000000 | USD | 20251029 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 41000000 | USD | 20250730 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 82000000 | USD | 20250730 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 158000000 | USD | 20260218 | Open filing evidence |
Operating Segments · Water Services · Industrial · Regulated Business
Consolidation Items · Product Or Service · Major Customers · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=awk:WaterServicesMember;srt:MajorCustomersAxis=awk:IndustrialMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 48000000 | USD | 20260429 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 195000000 | USD | 20260218 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 55000000 | USD | 20251029 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 146000000 | USD | 20251029 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 46000000 | USD | 20250730 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 91000000 | USD | 20250730 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 45000000 | USD | 20260429 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 182000000 | USD | 20260218 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 49000000 | USD | 20251029 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 137000000 | USD | 20251029 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 46000000 | USD | 20250730 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 88000000 | USD | 20250730 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 167000000 | USD | 20260218 | Open filing evidence |
Operating Segments · Water Services · Publicand Other · Regulated Business
Consolidation Items · Product Or Service · Major Customers · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=awk:WaterServicesMember;srt:MajorCustomersAxis=awk:PublicandOtherMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 70000000 | USD | 20260429 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 311000000 | USD | 20260218 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 93000000 | USD | 20251029 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 238000000 | USD | 20251029 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 78000000 | USD | 20250730 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 145000000 | USD | 20250730 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 67000000 | USD | 20260429 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 291000000 | USD | 20260218 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 93000000 | USD | 20251029 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 217000000 | USD | 20251029 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 68000000 | USD | 20250730 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 124000000 | USD | 20250730 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 274000000 | USD | 20260218 | Open filing evidence |
Operating Segments · Water Services · Residential · Regulated Business
Consolidation Items · Product Or Service · Major Customers · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=awk:WaterServicesMember;srt:MajorCustomersAxis=awk:ResidentialMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 593000000 | USD | 20260429 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 2557000000 | USD | 20260218 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 739000000 | USD | 20251029 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 1936000000 | USD | 20251029 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 637000000 | USD | 20250730 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 1197000000 | USD | 20250730 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 560000000 | USD | 20260429 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 2344000000 | USD | 20260218 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 677000000 | USD | 20251029 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 1760000000 | USD | 20251029 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 579000000 | USD | 20250730 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 1083000000 | USD | 20250730 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 2143000000 | USD | 20260218 | Open filing evidence |
Operating Segments · Water Services · Regulated Business
Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=awk:WaterServicesMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-01-01 – 2026-03-31 | 988000000 | USD | 20260429 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 4233000000 | USD | 20260218 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 1220000000 | USD | 20251029 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 3201000000 | USD | 20251029 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 1052000000 | USD | 20250730 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 1981000000 | USD | 20250730 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 929000000 | USD | 20260429 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 3862000000 | USD | 20260218 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 1113000000 | USD | 20251029 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 2893000000 | USD | 20251029 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 950000000 | USD | 20250730 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 1780000000 | USD | 20250730 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 3540000000 | USD | 20260218 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 3198000000 | USD | 20250219 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 3133000000 | USD | 20240214 | Open filing evidence |
Operating Segments · Regulated Business
Consolidation Items · Statement Business Segments
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 1263000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 2370000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-03-31 | 1107000000 | USD | 20260429 | Open filing evidence |
| 2025-01-01 – 2025-12-31 | 4704000000 | USD | 20260218 | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 1346000000 | USD | 20251029 | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 3555000000 | USD | 20251029 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 1173000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 2214000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-03-31 | 1041000000 | USD | 20260429 | Open filing evidence |
| 2024-01-01 – 2024-12-31 | 4265000000 | USD | 20260218 | Open filing evidence |
| 2024-07-01 – 2024-09-30 | 1223000000 | USD | 20251029 | Open filing evidence |
| 2024-01-01 – 2024-09-30 | 3195000000 | USD | 20251029 | Open filing evidence |
| 2024-04-01 – 2024-06-30 | 1048000000 | USD | 20250730 | Open filing evidence |
| 2024-01-01 – 2024-06-30 | 1972000000 | USD | 20250730 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 3902000000 | USD | 20260218 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 3475000000 | USD | 20250219 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 3367000000 | USD | 20240214 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 3220000000 | USD | 20230215 | Open filing evidence |
Operating Segments · Regulated Business · Miscellaneous Utility Charge
Consolidation Items · Statement Business Segments · Product Or Service
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:ProductOrServiceAxis=awk:MiscellaneousUtilityChargeMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2023-01-01 – 2023-12-31 | 35000000 | USD | 20240214 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 36000000 | USD | 20240214 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 26000000 | USD | 20240214 | Open filing evidence |
Operating Segments · Regulated Business · Wastewater Services
Consolidation Items · Statement Business Segments · Product Or Service
Source dimensions
srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:ProductOrServiceAxis=awk:WastewaterServicesMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2023-01-01 – 2023-12-31 | 327000000 | USD | 20240214 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 241000000 | USD | 20240214 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 208000000 | USD | 20240214 | Open filing evidence |
Commercial · Operating Segments · Wastewater Services · Regulated Business
Major Customers · Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=awk:CommercialMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=awk:WastewaterServicesMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-12-31 | 70000000 | USD | 20250219 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 62000000 | USD | 20250219 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 45000000 | USD | 20250219 | Open filing evidence |
Commercial · Operating Segments · Water Services · Regulated Business
Major Customers · Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=awk:CommercialMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=awk:WaterServicesMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-12-31 | 881000000 | USD | 20250219 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 798000000 | USD | 20250219 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 709000000 | USD | 20250219 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 676000000 | USD | 20240214 | Open filing evidence |
Commercial · Operating Segments · Regulated Business · Wastewater Services
Major Customers · Consolidation Items · Statement Business Segments · Product Or Service
Source dimensions
srt:MajorCustomersAxis=awk:CommercialMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:ProductOrServiceAxis=awk:WastewaterServicesMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2023-01-01 – 2023-12-31 | 62000000 | USD | 20240214 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 45000000 | USD | 20240214 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 37000000 | USD | 20240214 | Open filing evidence |
Commercial · Wastewater Services · Regulated Business
Major Customers · Product Or Service · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=awk:CommercialMember;srt:ProductOrServiceAxis=awk:WastewaterServicesMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2019-01-01 – 2019-12-31 | 31000000 | USD | 20200218 | Open filing evidence |
| 2018-01-01 – 2018-12-31 | 30000000 | USD | 20190219 | Open filing evidence |
Commercial · Water Services · Regulated Business
Major Customers · Product Or Service · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=awk:CommercialMember;srt:ProductOrServiceAxis=awk:WaterServicesMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2021-01-01 – 2021-12-31 | 676000000 | USD | 20220216 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 627000000 | USD | 20220216 | Open filing evidence |
| 2019-01-01 – 2019-12-31 | 639000000 | USD | 20220216 | Open filing evidence |
| 2018-01-01 – 2018-12-31 | 616000000 | USD | 20190219 | Open filing evidence |
Commercial · Regulated Business · Wastewater Services · Operating Segments
Major Customers · Statement Business Segments · Product Or Service · Consolidation Items
Source dimensions
srt:MajorCustomersAxis=awk:CommercialMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:ProductOrServiceAxis=awk:WastewaterServicesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-07-01 – 2026-09-30 | 26000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2026-01-01 – 2026-09-30 | 73000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 25000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 64000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
Commercial · Regulated Business · Water Services · Operating Segments
Major Customers · Statement Business Segments · Product Or Service · Consolidation Items
Source dimensions
srt:MajorCustomersAxis=awk:CommercialMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:ProductOrServiceAxis=awk:WaterServicesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-07-01 – 2026-09-30 | 297000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2026-01-01 – 2026-09-30 | 785000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 287000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 742000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
Fire Service · Operating Segments · Water Services · Regulated Business
Major Customers · Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=awk:FireServiceMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=awk:WaterServicesMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-12-31 | 164000000 | USD | 20250219 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 158000000 | USD | 20250219 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 147000000 | USD | 20250219 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 151000000 | USD | 20240214 | Open filing evidence |
Fire Service · Water Services · Regulated Business
Major Customers · Product Or Service · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=awk:FireServiceMember;srt:ProductOrServiceAxis=awk:WaterServicesMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2021-01-01 – 2021-12-31 | 151000000 | USD | 20220216 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 147000000 | USD | 20220216 | Open filing evidence |
| 2019-01-01 – 2019-12-31 | 142000000 | USD | 20220216 | Open filing evidence |
| 2018-01-01 – 2018-12-31 | 137000000 | USD | 20190219 | Open filing evidence |
Fire Service · Regulated Business · Water Services · Operating Segments
Major Customers · Statement Business Segments · Product Or Service · Consolidation Items
Source dimensions
srt:MajorCustomersAxis=awk:FireServiceMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:ProductOrServiceAxis=awk:WaterServicesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-07-01 – 2026-09-30 | 49000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2026-01-01 – 2026-09-30 | 146000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 46000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 139000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
Industrial · Operating Segments · Wastewater Services · Regulated Business
Major Customers · Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=awk:IndustrialMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=awk:WastewaterServicesMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-12-31 | 12000000 | USD | 20250219 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 8000000 | USD | 20250219 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 4000000 | USD | 20250219 | Open filing evidence |
Industrial · Operating Segments · Water Services · Regulated Business
Major Customers · Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=awk:IndustrialMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=awk:WaterServicesMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-12-31 | 182000000 | USD | 20250219 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 167000000 | USD | 20250219 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 152000000 | USD | 20250219 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 141000000 | USD | 20240214 | Open filing evidence |
Industrial · Operating Segments · Regulated Business · Wastewater Services
Major Customers · Consolidation Items · Statement Business Segments · Product Or Service
Source dimensions
srt:MajorCustomersAxis=awk:IndustrialMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:ProductOrServiceAxis=awk:WastewaterServicesMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2023-01-01 – 2023-12-31 | 8000000 | USD | 20240214 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 4000000 | USD | 20240214 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 4000000 | USD | 20240214 | Open filing evidence |
Industrial · Wastewater Services · Regulated Business
Major Customers · Product Or Service · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=awk:IndustrialMember;srt:ProductOrServiceAxis=awk:WastewaterServicesMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2021-01-01 – 2021-12-31 | 4000000 | USD | 20220216 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 3000000 | USD | 20220216 | Open filing evidence |
| 2019-01-01 – 2019-12-31 | 3000000 | USD | 20220216 | Open filing evidence |
| 2018-01-01 – 2018-12-31 | 2000000 | USD | 20190219 | Open filing evidence |
Industrial · Water Services · Regulated Business
Major Customers · Product Or Service · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=awk:IndustrialMember;srt:ProductOrServiceAxis=awk:WaterServicesMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2021-01-01 – 2021-12-31 | 141000000 | USD | 20220216 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 133000000 | USD | 20220216 | Open filing evidence |
| 2019-01-01 – 2019-12-31 | 138000000 | USD | 20220216 | Open filing evidence |
| 2018-01-01 – 2018-12-31 | 136000000 | USD | 20190219 | Open filing evidence |
Industrial · Regulated Business · Wastewater Services · Operating Segments
Major Customers · Statement Business Segments · Product Or Service · Consolidation Items
Source dimensions
srt:MajorCustomersAxis=awk:IndustrialMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:ProductOrServiceAxis=awk:WastewaterServicesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-07-01 – 2026-09-30 | 3000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2026-01-01 – 2026-09-30 | 8000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 7000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 17000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
Industrial · Regulated Business · Water Services · Operating Segments
Major Customers · Statement Business Segments · Product Or Service · Consolidation Items
Source dimensions
srt:MajorCustomersAxis=awk:IndustrialMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:ProductOrServiceAxis=awk:WaterServicesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-07-01 – 2026-09-30 | 60000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2026-01-01 – 2026-09-30 | 164000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 55000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 146000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
Publicand Other · Operating Segments · Wastewater Services · Regulated Business
Major Customers · Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=awk:PublicandOtherMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=awk:WastewaterServicesMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-12-31 | 36000000 | USD | 20250219 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 29000000 | USD | 20250219 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 19000000 | USD | 20250219 | Open filing evidence |
Publicand Other · Operating Segments · Water Services · Regulated Business
Major Customers · Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=awk:PublicandOtherMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=awk:WaterServicesMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-12-31 | 291000000 | USD | 20250219 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 274000000 | USD | 20250219 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 252000000 | USD | 20250219 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 230000000 | USD | 20240214 | Open filing evidence |
Publicand Other · Operating Segments · Regulated Business · Wastewater Services
Major Customers · Consolidation Items · Statement Business Segments · Product Or Service
Source dimensions
srt:MajorCustomersAxis=awk:PublicandOtherMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:ProductOrServiceAxis=awk:WastewaterServicesMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2023-01-01 – 2023-12-31 | 29000000 | USD | 20240214 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 19000000 | USD | 20240214 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 16000000 | USD | 20240214 | Open filing evidence |
Publicand Other · Wastewater Services · Regulated Business
Major Customers · Product Or Service · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=awk:PublicandOtherMember;srt:ProductOrServiceAxis=awk:WastewaterServicesMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2021-01-01 – 2021-12-31 | 16000000 | USD | 20220216 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 14000000 | USD | 20220216 | Open filing evidence |
| 2019-01-01 – 2019-12-31 | 14000000 | USD | 20220216 | Open filing evidence |
| 2018-01-01 – 2018-12-31 | 14000000 | USD | 20190219 | Open filing evidence |
Publicand Other · Water Services · Regulated Business
Major Customers · Product Or Service · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=awk:PublicandOtherMember;srt:ProductOrServiceAxis=awk:WaterServicesMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2021-01-01 – 2021-12-31 | 230000000 | USD | 20220216 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 201000000 | USD | 20220216 | Open filing evidence |
| 2019-01-01 – 2019-12-31 | 214000000 | USD | 20220216 | Open filing evidence |
| 2018-01-01 – 2018-12-31 | 197000000 | USD | 20190219 | Open filing evidence |
Publicand Other · Regulated Business · Wastewater Services · Operating Segments
Major Customers · Statement Business Segments · Product Or Service · Consolidation Items
Source dimensions
srt:MajorCustomersAxis=awk:PublicandOtherMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:ProductOrServiceAxis=awk:WastewaterServicesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-07-01 – 2026-09-30 | 10000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2026-01-01 – 2026-09-30 | 30000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 6000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 21000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
Publicand Other · Regulated Business · Water Services · Operating Segments
Major Customers · Statement Business Segments · Product Or Service · Consolidation Items
Source dimensions
srt:MajorCustomersAxis=awk:PublicandOtherMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:ProductOrServiceAxis=awk:WaterServicesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-07-01 – 2026-09-30 | 95000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2026-01-01 – 2026-09-30 | 250000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 93000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 238000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
Residential · Operating Segments · Wastewater Services · Regulated Business
Major Customers · Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=awk:ResidentialMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=awk:WastewaterServicesMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-12-31 | 243000000 | USD | 20250219 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 228000000 | USD | 20250219 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 173000000 | USD | 20250219 | Open filing evidence |
Residential · Operating Segments · Water Services · Regulated Business
Major Customers · Consolidation Items · Product Or Service · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=awk:ResidentialMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=awk:WaterServicesMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2024-01-01 – 2024-12-31 | 2344000000 | USD | 20250219 | Open filing evidence |
| 2023-01-01 – 2023-12-31 | 2143000000 | USD | 20250219 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 1938000000 | USD | 20250219 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 1935000000 | USD | 20240214 | Open filing evidence |
Residential · Operating Segments · Regulated Business · Wastewater Services
Major Customers · Consolidation Items · Statement Business Segments · Product Or Service
Source dimensions
srt:MajorCustomersAxis=awk:ResidentialMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:ProductOrServiceAxis=awk:WastewaterServicesMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2023-01-01 – 2023-12-31 | 228000000 | USD | 20240214 | Open filing evidence |
| 2022-01-01 – 2022-12-31 | 173000000 | USD | 20240214 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 151000000 | USD | 20240214 | Open filing evidence |
Residential · Wastewater Services · Operating Segments · Regulated Business
Major Customers · Product Or Service · Consolidation Items · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=awk:ResidentialMember;srt:ProductOrServiceAxis=awk:WastewaterServicesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2022-01-01 – 2022-12-31 | 173000000 | USD | 20230215 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 151000000 | USD | 20230215 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 134000000 | USD | 20230215 | Open filing evidence |
Residential · Wastewater Services · Regulated Business
Major Customers · Product Or Service · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=awk:ResidentialMember;srt:ProductOrServiceAxis=awk:WastewaterServicesMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2021-01-01 – 2021-12-31 | 151000000 | USD | 20220216 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 134000000 | USD | 20220216 | Open filing evidence |
| 2019-01-01 – 2019-12-31 | 119000000 | USD | 20220216 | Open filing evidence |
| 2018-01-01 – 2018-12-31 | 115000000 | USD | 20190219 | Open filing evidence |
Residential · Water Services · Operating Segments · Regulated Business
Major Customers · Product Or Service · Consolidation Items · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=awk:ResidentialMember;srt:ProductOrServiceAxis=awk:WaterServicesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2022-01-01 – 2022-12-31 | 1938000000 | USD | 20230215 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 1935000000 | USD | 20230215 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 1895000000 | USD | 20230215 | Open filing evidence |
Residential · Water Services · Regulated Business
Major Customers · Product Or Service · Statement Business Segments
Source dimensions
srt:MajorCustomersAxis=awk:ResidentialMember;srt:ProductOrServiceAxis=awk:WaterServicesMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2021-01-01 – 2021-12-31 | 1935000000 | USD | 20220216 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 1895000000 | USD | 20220216 | Open filing evidence |
| 2019-01-01 – 2019-12-31 | 1734000000 | USD | 20220216 | Open filing evidence |
| 2018-01-01 – 2018-12-31 | 1663000000 | USD | 20190219 | Open filing evidence |
Residential · Regulated Business · Wastewater Services · Operating Segments
Major Customers · Statement Business Segments · Product Or Service · Consolidation Items
Source dimensions
srt:MajorCustomersAxis=awk:ResidentialMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:ProductOrServiceAxis=awk:WastewaterServicesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-07-01 – 2026-09-30 | 81000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2026-01-01 – 2026-09-30 | 229000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 75000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 214000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
Residential · Regulated Business · Water Services · Operating Segments
Major Customers · Statement Business Segments · Product Or Service · Consolidation Items
Source dimensions
srt:MajorCustomersAxis=awk:ResidentialMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:ProductOrServiceAxis=awk:WaterServicesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-07-01 – 2026-09-30 | 762000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2026-01-01 – 2026-09-30 | 2044000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 739000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 1936000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
Miscellaneous Utility Charge · Operating Segments · Regulated Business
Product Or Service · Consolidation Items · Statement Business Segments
Source dimensions
srt:ProductOrServiceAxis=awk:MiscellaneousUtilityChargeMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2022-01-01 – 2022-12-31 | 36000000 | USD | 20230215 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 26000000 | USD | 20230215 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 32000000 | USD | 20230215 | Open filing evidence |
Miscellaneous Utility Charge · Regulated Business
Product Or Service · Statement Business Segments
Source dimensions
srt:ProductOrServiceAxis=awk:MiscellaneousUtilityChargeMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2021-01-01 – 2021-12-31 | 26000000 | USD | 20220216 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 32000000 | USD | 20220216 | Open filing evidence |
| 2019-01-01 – 2019-12-31 | 36000000 | USD | 20220216 | Open filing evidence |
| 2018-01-01 – 2018-12-31 | 48000000 | USD | 20190219 | Open filing evidence |
Miscellaneous Utility Charge · Regulated Business · Operating Segments
Product Or Service · Statement Business Segments · Consolidation Items
Source dimensions
srt:ProductOrServiceAxis=awk:MiscellaneousUtilityChargeMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 12000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 24000000 | USD | 20260729 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 14000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 25000000 | USD | 20260729 | Open filing evidence |
Wastewater Services · Operating Segments · Regulated Business
Product Or Service · Consolidation Items · Statement Business Segments
Source dimensions
srt:ProductOrServiceAxis=awk:WastewaterServicesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2022-01-01 – 2022-12-31 | 241000000 | USD | 20230215 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 208000000 | USD | 20230215 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 185000000 | USD | 20230215 | Open filing evidence |
Wastewater Services · Operating Segments · Regulated Business · Industrial
Product Or Service · Consolidation Items · Statement Business Segments · Major Customers
Source dimensions
srt:ProductOrServiceAxis=awk:WastewaterServicesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:MajorCustomersAxis=awk:IndustrialMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2022-01-01 – 2022-12-31 | 4000000 | USD | 20230215 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 4000000 | USD | 20230215 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 3000000 | USD | 20230215 | Open filing evidence |
Wastewater Services · Operating Segments · Regulated Business · Publicand Other
Product Or Service · Consolidation Items · Statement Business Segments · Major Customers
Source dimensions
srt:ProductOrServiceAxis=awk:WastewaterServicesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:MajorCustomersAxis=awk:PublicandOtherMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2022-01-01 – 2022-12-31 | 19000000 | USD | 20230215 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 16000000 | USD | 20230215 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 14000000 | USD | 20230215 | Open filing evidence |
Wastewater Services · Commercial · Operating Segments · Regulated Business
Product Or Service · Major Customers · Consolidation Items · Statement Business Segments
Source dimensions
srt:ProductOrServiceAxis=awk:WastewaterServicesMember;srt:MajorCustomersAxis=awk:CommercialMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2022-01-01 – 2022-12-31 | 45000000 | USD | 20230215 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 37000000 | USD | 20230215 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 34000000 | USD | 20230215 | Open filing evidence |
Wastewater Services · Commercial · Regulated Business
Product Or Service · Major Customers · Statement Business Segments
Source dimensions
srt:ProductOrServiceAxis=awk:WastewaterServicesMember;srt:MajorCustomersAxis=awk:CommercialMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2021-01-01 – 2021-12-31 | 37000000 | USD | 20220216 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 34000000 | USD | 20220216 | Open filing evidence |
| 2019-01-01 – 2019-12-31 | 31000000 | USD | 20220216 | Open filing evidence |
Wastewater Services · Commercial · Regulated Business · Operating Segments
Product Or Service · Major Customers · Statement Business Segments · Consolidation Items
Source dimensions
srt:ProductOrServiceAxis=awk:WastewaterServicesMember;srt:MajorCustomersAxis=awk:CommercialMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;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 | 47000000 | USD | 20260729 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 21000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 39000000 | USD | 20260729 | Open filing evidence |
Wastewater Services · Industrial · Regulated Business · Operating Segments
Product Or Service · Major Customers · Statement Business Segments · Consolidation Items
Source dimensions
srt:ProductOrServiceAxis=awk:WastewaterServicesMember;srt:MajorCustomersAxis=awk:IndustrialMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 3000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 5000000 | USD | 20260729 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 5000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 10000000 | USD | 20260729 | Open filing evidence |
Wastewater Services · Publicand Other · Regulated Business · Operating Segments
Product Or Service · Major Customers · Statement Business Segments · Consolidation Items
Source dimensions
srt:ProductOrServiceAxis=awk:WastewaterServicesMember;srt:MajorCustomersAxis=awk:PublicandOtherMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 11000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 20000000 | USD | 20260729 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 10000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 20000000 | USD | 20260729 | Open filing evidence |
Wastewater Services · Residential · Regulated Business · Operating Segments
Product Or Service · Major Customers · Statement Business Segments · Consolidation Items
Source dimensions
srt:ProductOrServiceAxis=awk:WastewaterServicesMember;srt:MajorCustomersAxis=awk:ResidentialMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 74000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 148000000 | USD | 20260729 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 71000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 139000000 | USD | 20260729 | Open filing evidence |
Wastewater Services · Regulated Business
Product Or Service · Statement Business Segments
Source dimensions
srt:ProductOrServiceAxis=awk:WastewaterServicesMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2021-01-01 – 2021-12-31 | 208000000 | USD | 20220216 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 185000000 | USD | 20220216 | Open filing evidence |
| 2019-01-01 – 2019-12-31 | 167000000 | USD | 20220216 | Open filing evidence |
| 2018-01-01 – 2018-12-31 | 161000000 | USD | 20190219 | Open filing evidence |
Wastewater Services · Regulated Business · Operating Segments
Product Or Service · Statement Business Segments · Consolidation Items
Source dimensions
srt:ProductOrServiceAxis=awk:WastewaterServicesMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 113000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 220000000 | USD | 20260729 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 107000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 208000000 | USD | 20260729 | Open filing evidence |
Water Services · Operating Segments · Regulated Business
Product Or Service · Consolidation Items · Statement Business Segments
Source dimensions
srt:ProductOrServiceAxis=awk:WaterServicesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2022-01-01 – 2022-12-31 | 3198000000 | USD | 20230215 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 3133000000 | USD | 20230215 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 3003000000 | USD | 20230215 | Open filing evidence |
Water Services · Operating Segments · Regulated Business · Fire Service
Product Or Service · Consolidation Items · Statement Business Segments · Major Customers
Source dimensions
srt:ProductOrServiceAxis=awk:WaterServicesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:MajorCustomersAxis=awk:FireServiceMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2022-01-01 – 2022-12-31 | 147000000 | USD | 20230215 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 151000000 | USD | 20230215 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 147000000 | USD | 20230215 | Open filing evidence |
Water Services · Operating Segments · Regulated Business · Industrial
Product Or Service · Consolidation Items · Statement Business Segments · Major Customers
Source dimensions
srt:ProductOrServiceAxis=awk:WaterServicesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:MajorCustomersAxis=awk:IndustrialMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2022-01-01 – 2022-12-31 | 152000000 | USD | 20230215 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 141000000 | USD | 20230215 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 133000000 | USD | 20230215 | Open filing evidence |
Water Services · Operating Segments · Regulated Business · Publicand Other
Product Or Service · Consolidation Items · Statement Business Segments · Major Customers
Source dimensions
srt:ProductOrServiceAxis=awk:WaterServicesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:MajorCustomersAxis=awk:PublicandOtherMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2022-01-01 – 2022-12-31 | 252000000 | USD | 20230215 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 230000000 | USD | 20230215 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 201000000 | USD | 20230215 | Open filing evidence |
Water Services · Commercial · Operating Segments · Regulated Business
Product Or Service · Major Customers · Consolidation Items · Statement Business Segments
Source dimensions
srt:ProductOrServiceAxis=awk:WaterServicesMember;srt:MajorCustomersAxis=awk:CommercialMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2022-01-01 – 2022-12-31 | 709000000 | USD | 20230215 | Open filing evidence |
| 2021-01-01 – 2021-12-31 | 676000000 | USD | 20230215 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 627000000 | USD | 20230215 | Open filing evidence |
Water Services · Commercial · Regulated Business · Operating Segments
Product Or Service · Major Customers · Statement Business Segments · Consolidation Items
Source dimensions
srt:ProductOrServiceAxis=awk:WaterServicesMember;srt:MajorCustomersAxis=awk:CommercialMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 259000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 488000000 | USD | 20260729 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 243000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 455000000 | USD | 20260729 | Open filing evidence |
Water Services · Fire Service · Regulated Business
Product Or Service · Major Customers · Statement Business Segments
Source dimensions
srt:ProductOrServiceAxis=awk:WaterServicesMember;srt:MajorCustomersAxis=awk:FireServiceMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2020-01-01 – 2020-12-31 | 147000000 | USD | 20210224 | Open filing evidence |
Water Services · Fire Service · Regulated Business · Operating Segments
Product Or Service · Major Customers · Statement Business Segments · Consolidation Items
Source dimensions
srt:ProductOrServiceAxis=awk:WaterServicesMember;srt:MajorCustomersAxis=awk:FireServiceMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 49000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 97000000 | USD | 20260729 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 48000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 93000000 | USD | 20260729 | Open filing evidence |
Water Services · Industrial · Regulated Business · Operating Segments
Product Or Service · Major Customers · Statement Business Segments · Consolidation Items
Source dimensions
srt:ProductOrServiceAxis=awk:WaterServicesMember;srt:MajorCustomersAxis=awk:IndustrialMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 56000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 104000000 | USD | 20260729 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 46000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 91000000 | USD | 20260729 | Open filing evidence |
Water Services · Publicand Other · Regulated Business · Operating Segments
Product Or Service · Major Customers · Statement Business Segments · Consolidation Items
Source dimensions
srt:ProductOrServiceAxis=awk:WaterServicesMember;srt:MajorCustomersAxis=awk:PublicandOtherMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 85000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 155000000 | USD | 20260729 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 78000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 145000000 | USD | 20260729 | Open filing evidence |
Water Services · Residential · Regulated Business · Operating Segments
Product Or Service · Major Customers · Statement Business Segments · Consolidation Items
Source dimensions
srt:ProductOrServiceAxis=awk:WaterServicesMember;srt:MajorCustomersAxis=awk:ResidentialMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 689000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 1282000000 | USD | 20260729 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 637000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 1197000000 | USD | 20260729 | Open filing evidence |
Water Services · Regulated Business
Product Or Service · Statement Business Segments
Source dimensions
srt:ProductOrServiceAxis=awk:WaterServicesMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2021-01-01 – 2021-12-31 | 3133000000 | USD | 20220216 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 3003000000 | USD | 20220216 | Open filing evidence |
| 2019-01-01 – 2019-12-31 | 2867000000 | USD | 20220216 | Open filing evidence |
| 2018-01-01 – 2018-12-31 | 2749000000 | USD | 20190219 | Open filing evidence |
Water Services · Regulated Business · Operating Segments
Product Or Service · Statement Business Segments · Consolidation Items
Source dimensions
srt:ProductOrServiceAxis=awk:WaterServicesMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-04-01 – 2026-06-30 | 1138000000 | USD | 20260729 | Open filing evidence |
| 2026-01-01 – 2026-06-30 | 2126000000 | USD | 20260729 | Open filing evidence |
| 2025-04-01 – 2025-06-30 | 1052000000 | USD | 20260729 | Open filing evidence |
| 2025-01-01 – 2025-06-30 | 1981000000 | USD | 20260729 | Open filing evidence |
Water Services · Regulated Business · Commercial
Product Or Service · Statement Business Segments · Major Customers
Source dimensions
srt:ProductOrServiceAxis=awk:WaterServicesMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:MajorCustomersAxis=awk:CommercialMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2020-01-01 – 2020-12-31 | 627000000 | USD | 20210224 | Open filing evidence |
Water Services · Regulated Business · Industrial
Product Or Service · Statement Business Segments · Major Customers
Source dimensions
srt:ProductOrServiceAxis=awk:WaterServicesMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:MajorCustomersAxis=awk:IndustrialMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2020-01-01 – 2020-12-31 | 133000000 | USD | 20210224 | Open filing evidence |
Water Services · Regulated Business · Publicand Other
Product Or Service · Statement Business Segments · Major Customers
Source dimensions
srt:ProductOrServiceAxis=awk:WaterServicesMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:MajorCustomersAxis=awk:PublicandOtherMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2020-01-01 – 2020-12-31 | 201000000 | USD | 20210224 | Open filing evidence |
Water Services · Regulated Business · Residential
Product Or Service · Statement Business Segments · Major Customers
Source dimensions
srt:ProductOrServiceAxis=awk:WaterServicesMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:MajorCustomersAxis=awk:ResidentialMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2020-01-01 – 2020-12-31 | 1895000000 | USD | 20210224 | Open filing evidence |
Operating Segments · Market Based Operations
Consolidation Items · Statement Business Segments
Source dimensions
us-gaap:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=awk:MarketBasedOperationsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2015-04-01 – 2015-06-30 | 99976000 | USD | 20150805 | Open filing evidence |
| 2015-01-01 – 2015-06-30 | 187449000 | USD | 20150805 | Open filing evidence |
| 2015-01-01 – 2015-03-31 | 87473000 | USD | 20150506 | Open filing evidence |
| 2014-07-01 – 2014-09-30 | 96980000 | USD | 20141105 | Open filing evidence |
| 2014-01-01 – 2014-09-30 | 253857000 | USD | 20141105 | Open filing evidence |
| 2014-04-01 – 2014-06-30 | 81022000 Restated | USD | 20150805 | Open filing evidence |
| 2014-01-01 – 2014-06-30 | 156877000 Restated | USD | 20150805 | Open filing evidence |
| 2014-01-01 – 2014-03-31 | 75855000 Restated | USD | 20150506 | Open filing evidence |
| 2013-01-01 – 2013-12-31 | 302541000 | USD | 20150225 | Open filing evidence |
| 2013-07-01 – 2013-09-30 | 83558000 | USD | 20141105 | Open filing evidence |
| 2013-01-01 – 2013-09-30 | 221751000 | USD | 20141105 | Open filing evidence |
| 2013-04-01 – 2013-06-30 | 80755000 | USD | 20140806 | Open filing evidence |
| 2013-01-01 – 2013-06-30 | 148091000 | USD | 20140806 | Open filing evidence |
| 2013-01-01 – 2013-03-31 | 67336000 | USD | 20140507 | Open filing evidence |
| 2012-01-01 – 2012-12-31 | 307366000 | USD | 20150225 | Open filing evidence |
Operating Segments · Regulated Business
Consolidation Items · Statement Business Segments
Source dimensions
us-gaap:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2015-04-01 – 2015-06-30 | 686811000 | USD | 20150805 | Open filing evidence |
| 2015-01-01 – 2015-06-30 | 1302221000 | USD | 20150805 | Open filing evidence |
| 2015-01-01 – 2015-03-31 | 615410000 | USD | 20150506 | Open filing evidence |
| 2014-04-01 – 2014-06-30 | 678101000 | USD | 20150805 | Open filing evidence |
| 2014-01-01 – 2014-06-30 | 1285745000 | USD | 20150805 | Open filing evidence |
| 2014-01-01 – 2014-03-31 | 607644000 | USD | 20150506 | Open filing evidence |
Operating Segments · Regulated Operation
Consolidation Items · Statement Business Segments
Source dimensions
us-gaap:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=us-gaap:RegulatedOperationMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2014-04-01 – 2014-06-30 | 678101000 | USD | 20140806 | Open filing evidence |
| 2014-01-01 – 2014-06-30 | 1285745000 | USD | 20140806 | Open filing evidence |
| 2014-01-01 – 2014-03-31 | 607644000 | USD | 20140507 | Open filing evidence |
| 2013-04-01 – 2013-06-30 | 647897000 | USD | 20140806 | Open filing evidence |
| 2013-01-01 – 2013-06-30 | 1221134000 | USD | 20140806 | Open filing evidence |
| 2013-01-01 – 2013-03-31 | 573237000 | USD | 20140507 | Open filing evidence |
Market Based Businesses
Statement Business Segments
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=awk:MarketBasedBusinessesMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2021-01-01 – 2021-12-31 | 563000000 | USD | 20220216 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 540000000 | USD | 20220216 | Open filing evidence |
| 2019-01-01 – 2019-12-31 | 539000000 | USD | 20220216 | Open filing evidence |
| 2018-01-01 – 2018-12-31 | 476000000 | USD | 20190219 | Open filing evidence |
Market Based Operations · Operating Segments
Statement Business Segments · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=awk:MarketBasedOperationsMember;us-gaap:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2014-01-01 – 2014-12-31 | 354679000 | USD | 20150225 | Open filing evidence |
| 2013-01-01 – 2013-12-31 | 325463000 | USD | 20140227 | Open filing evidence |
| 2013-07-01 – 2013-09-30 | 90564000 | USD | 20131106 | Open filing evidence |
| 2013-01-01 – 2013-09-30 | 238655000 | USD | 20131106 | Open filing evidence |
| 2012-01-01 – 2012-12-31 | 330329000 | USD | 20140227 | Open filing evidence |
| 2012-07-01 – 2012-09-30 | 85878000 | USD | 20131106 | Open filing evidence |
| 2012-01-01 – 2012-09-30 | 249254000 | USD | 20131106 | Open filing evidence |
| 2011-01-01 – 2011-12-31 | 327815000 | USD | 20140227 | Open filing evidence |
Regulated Business
Statement Business Segments
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2021-01-01 – 2021-12-31 | 3367000000 | USD | 20220216 | Open filing evidence |
| 2020-01-01 – 2020-12-31 | 3220000000 | USD | 20220216 | Open filing evidence |
| 2019-01-01 – 2019-12-31 | 3070000000 | USD | 20220216 | Open filing evidence |
| 2018-01-01 – 2018-12-31 | 2958000000 | USD | 20190219 | Open filing evidence |
Regulated Business · Operating Segments
Statement Business Segments · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-07-01 – 2026-09-30 | 1395000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2026-01-01 – 2026-09-30 | 3765000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 1346000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 3555000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
Regulated Business · Commercial · Wastewater Services
Statement Business Segments · Major Customers · Product Or Service
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:MajorCustomersAxis=awk:CommercialMember;srt:ProductOrServiceAxis=awk:WastewaterServicesMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2020-01-01 – 2020-12-31 | 34000000 | USD | 20210224 | Open filing evidence |
Regulated Business · Residential · Wastewater Services
Statement Business Segments · Major Customers · Product Or Service
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:MajorCustomersAxis=awk:ResidentialMember;srt:ProductOrServiceAxis=awk:WastewaterServicesMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2020-01-01 – 2020-12-31 | 134000000 | USD | 20210224 | Open filing evidence |
Regulated Business · Miscellaneous Utility Charge
Statement Business Segments · Product Or Service
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:ProductOrServiceAxis=awk:MiscellaneousUtilityChargeMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2020-01-01 – 2020-12-31 | 32000000 | USD | 20210224 | Open filing evidence |
Regulated Business · Miscellaneous Utility Charge · Operating Segments
Statement Business Segments · Product Or Service · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:ProductOrServiceAxis=awk:MiscellaneousUtilityChargeMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-07-01 – 2026-09-30 | 12000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2026-01-01 – 2026-09-30 | 36000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 13000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 38000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
Regulated Business · Wastewater Services
Statement Business Segments · Product Or Service
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:ProductOrServiceAxis=awk:WastewaterServicesMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2020-01-01 – 2020-12-31 | 185000000 | USD | 20210224 | Open filing evidence |
Regulated Business · Wastewater Services · Operating Segments
Statement Business Segments · Product Or Service · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:ProductOrServiceAxis=awk:WastewaterServicesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-07-01 – 2026-09-30 | 120000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2026-01-01 – 2026-09-30 | 340000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 113000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 316000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
Regulated Business · Wastewater Services · Industrial
Statement Business Segments · Product Or Service · Major Customers
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:ProductOrServiceAxis=awk:WastewaterServicesMember;srt:MajorCustomersAxis=awk:IndustrialMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2020-01-01 – 2020-12-31 | 3000000 | USD | 20210224 | Open filing evidence |
Regulated Business · Wastewater Services · Publicand Other
Statement Business Segments · Product Or Service · Major Customers
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:ProductOrServiceAxis=awk:WastewaterServicesMember;srt:MajorCustomersAxis=awk:PublicandOtherMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2020-01-01 – 2020-12-31 | 14000000 | USD | 20210224 | Open filing evidence |
Regulated Business · Water Services · Operating Segments
Statement Business Segments · Product Or Service · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=awk:RegulatedBusinessMember;srt:ProductOrServiceAxis=awk:WaterServicesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2026-07-01 – 2026-09-30 | 1263000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2026-01-01 – 2026-09-30 | 3389000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2025-07-01 – 2025-09-30 | 1220000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
| 2025-01-01 – 2025-09-30 | 3201000000 | USD | 2026-10-28 · 20:27:22.000Z | Open filing evidence |
Regulated Operation · Operating Segments
Statement Business Segments · Consolidation Items
Source dimensions
us-gaap:StatementBusinessSegmentsAxis=us-gaap:RegulatedOperationMember;us-gaap:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember| Period | Value | Unit | Filed | Evidence |
|---|---|---|---|---|
| 2013-01-01 – 2013-12-31 | 2593918000 | USD | 20140227 | Open filing evidence |
| 2013-07-01 – 2013-09-30 | 743091000 | USD | 20131106 | Open filing evidence |
| 2013-01-01 – 2013-09-30 | 1964225000 | USD | 20131106 | Open filing evidence |
| 2012-01-01 – 2012-12-31 | 2564434000 | USD | 20140227 | Open filing evidence |
| 2012-07-01 – 2012-09-30 | 750742000 | USD | 20131106 | Open filing evidence |
| 2012-01-01 – 2012-09-30 | 1960218000 | USD | 20131106 | Open filing evidence |
| 2011-01-01 – 2011-12-31 | 2368891000 | USD | 20140227 | Open filing evidence |