Fundies.
English

Segment disclosures

Company overview

WestRock Company

Each reported dimension combination stays separate. Revenue and operating income are shown as reported, with their dates and sources.

Revenue · Reported segment facts

101 dimension combinations 780 retained observations 13 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 · Consumer Packaging

Consolidation Items · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:IntersegmentEliminationMember;us-gaap:StatementBusinessSegmentsAxis=wrk:ConsumerPackagingMember
PeriodValueUnitFiledEvidence
2022-10-01 – 2023-09-30-30700000 USD20231117Open filing evidence
2023-04-01 – 2023-06-30-7700000 USD20230804Open filing evidence
2022-10-01 – 2023-06-30-19900000 USD20230804Open filing evidence
2023-01-01 – 2023-03-31-7500000 USD20230505Open filing evidence
2022-10-01 – 2023-03-31-12200000 USD20230505Open filing evidence
2022-10-01 – 2022-12-31-4700000 USD20230203Open filing evidence
2021-10-01 – 2022-09-30-27800000 USD20231117Open filing evidence
2022-04-01 – 2022-06-30-6100000 USD20230804Open filing evidence
2021-10-01 – 2022-06-30-19000000 USD20230804Open filing evidence
2022-01-01 – 2022-03-31-6900000 USD20230505Open filing evidence
2021-10-01 – 2022-03-31-12900000 USD20230505Open filing evidence
2021-10-01 – 2021-12-31-6000000 USD20230203Open filing evidence
2020-10-01 – 2021-09-30-20300000 USD20231117Open filing evidence
2021-04-01 – 2021-06-30-5000000 RestatedUSD20220805Open filing evidence
2020-10-01 – 2021-06-30-13000000 RestatedUSD20220805Open filing evidence
2021-01-01 – 2021-03-31-4100000 RestatedUSD20220506Open filing evidence
2020-10-01 – 2021-03-31-8000000 RestatedUSD20220506Open filing evidence

Intersegment Elimination · Corrugated Packaging

Consolidation Items · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:IntersegmentEliminationMember;us-gaap:StatementBusinessSegmentsAxis=wrk:CorrugatedPackagingMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-31-62900000 USD20240503Open filing evidence
2023-10-01 – 2024-03-31-122100000 USD20240503Open filing evidence
2023-10-01 – 2023-12-31-59200000 USD20240202Open filing evidence
2023-01-01 – 2023-03-31-81600000 USD20240503Open filing evidence
2022-10-01 – 2023-03-31-150000000 USD20240503Open filing evidence
2022-10-01 – 2022-12-31-68400000 USD20240202Open filing evidence
2021-04-01 – 2021-06-30-22600000 USD20210809Open filing evidence
2020-10-01 – 2021-06-30-63200000 USD20210809Open filing evidence
2021-01-01 – 2021-03-31-18600000 USD20210507Open filing evidence
2020-10-01 – 2021-03-31-40600000 USD20210507Open filing evidence

Intersegment Elimination · Other Unallocated

Consolidation Items · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:IntersegmentEliminationMember;us-gaap:StatementBusinessSegmentsAxis=wrk:OtherUnallocatedMember
PeriodValueUnitFiledEvidence
2022-10-01 – 2022-12-31-1200000 USD20230203Open filing evidence

Operating Segments · Unaffiliated Customers · Consumer Packaging

Consolidation Items · Major Customers · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:MajorCustomersAxis=wrk:UnaffiliatedCustomersMember;us-gaap:StatementBusinessSegmentsAxis=wrk:ConsumerPackagingMember
PeriodValueUnitFiledEvidence
2022-10-01 – 2023-09-304911100000 USD20231117Open filing evidence
2023-04-01 – 2023-06-301242900000 USD20230804Open filing evidence
2022-10-01 – 2023-06-303710800000 USD20230804Open filing evidence
2023-01-01 – 2023-03-311257600000 USD20230505Open filing evidence
2022-10-01 – 2023-03-312467900000 USD20230505Open filing evidence
2022-10-01 – 2022-12-311210300000 USD20230203Open filing evidence
2021-10-01 – 2022-09-304937400000 USD20231117Open filing evidence
2022-04-01 – 2022-06-301264100000 USD20230804Open filing evidence
2021-10-01 – 2022-06-303640500000 USD20230804Open filing evidence
2022-01-01 – 2022-03-311243700000 USD20230505Open filing evidence
2021-10-01 – 2022-03-312376400000 USD20230505Open filing evidence
2021-10-01 – 2021-12-311132700000 USD20230203Open filing evidence
2020-10-01 – 2021-09-304413600000 USD20231117Open filing evidence
2021-04-01 – 2021-06-301127200000 USD20220805Open filing evidence
2020-10-01 – 2021-06-303262300000 USD20220805Open filing evidence
2021-01-01 – 2021-03-311076500000 USD20220506Open filing evidence
2020-10-01 – 2021-03-312135100000 USD20220506Open filing evidence

Operating Segments · Unaffiliated Customers · Corrugated Packaging

Consolidation Items · Major Customers · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:MajorCustomersAxis=wrk:UnaffiliatedCustomersMember;us-gaap:StatementBusinessSegmentsAxis=wrk:CorrugatedPackagingMember
PeriodValueUnitFiledEvidence
2022-10-01 – 2023-09-309774600000 USD20231117Open filing evidence
2023-04-01 – 2023-06-302496200000 USD20230804Open filing evidence
2022-10-01 – 2023-06-307311000000 USD20230804Open filing evidence
2023-01-01 – 2023-03-312545800000 USD20230505Open filing evidence
2022-10-01 – 2023-03-314814800000 USD20230505Open filing evidence
2022-10-01 – 2022-12-312168000000 USD20230203Open filing evidence
2021-10-01 – 2022-09-308979600000 USD20231117Open filing evidence
2022-04-01 – 2022-06-302289000000 USD20230804Open filing evidence
2021-10-01 – 2022-06-306675300000 USD20230804Open filing evidence
2022-01-01 – 2022-03-312240500000 USD20230505Open filing evidence
2021-10-01 – 2022-03-314386300000 USD20230505Open filing evidence
2021-10-01 – 2021-12-312145800000 USD20230203Open filing evidence
2020-10-01 – 2021-09-308095200000 USD20231117Open filing evidence
2021-04-01 – 2021-06-302067800000 USD20220805Open filing evidence
2020-10-01 – 2021-06-305966700000 USD20220805Open filing evidence
2021-01-01 – 2021-03-311950500000 USD20220506Open filing evidence
2020-10-01 – 2021-03-313898900000 USD20220506Open filing evidence

Operating Segments · Unaffiliated Customers · Distribution Segment

Consolidation Items · Major Customers · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:MajorCustomersAxis=wrk:UnaffiliatedCustomersMember;us-gaap:StatementBusinessSegmentsAxis=wrk:DistributionSegmentMember
PeriodValueUnitFiledEvidence
2022-10-01 – 2023-09-301254400000 USD20231117Open filing evidence
2023-04-01 – 2023-06-30316300000 USD20230804Open filing evidence
2022-10-01 – 2023-06-30942500000 USD20230804Open filing evidence
2023-01-01 – 2023-03-31306000000 USD20230505Open filing evidence
2022-10-01 – 2023-03-31626200000 USD20230505Open filing evidence
2022-10-01 – 2022-12-31320200000 USD20230203Open filing evidence
2021-10-01 – 2022-09-301409300000 USD20231117Open filing evidence
2022-04-01 – 2022-06-30356300000 USD20230804Open filing evidence
2021-10-01 – 2022-06-301037200000 USD20230804Open filing evidence
2022-01-01 – 2022-03-31359800000 USD20230505Open filing evidence
2021-10-01 – 2022-03-31680900000 USD20230505Open filing evidence
2021-10-01 – 2021-12-31321100000 USD20230203Open filing evidence
2020-10-01 – 2021-09-301254300000 USD20231117Open filing evidence
2021-04-01 – 2021-06-30322100000 USD20220805Open filing evidence
2020-10-01 – 2021-06-30905900000 USD20220805Open filing evidence
2021-01-01 – 2021-03-31280200000 USD20220506Open filing evidence
2020-10-01 – 2021-03-31583800000 USD20220506Open filing evidence

Operating Segments · Unaffiliated Customers · Global Paper

Consolidation Items · Major Customers · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:MajorCustomersAxis=wrk:UnaffiliatedCustomersMember;us-gaap:StatementBusinessSegmentsAxis=wrk:GlobalPaperMember
PeriodValueUnitFiledEvidence
2022-10-01 – 2023-09-304369900000 USD20231117Open filing evidence
2023-04-01 – 2023-06-301065700000 USD20230804Open filing evidence
2022-10-01 – 2023-06-303357500000 USD20230804Open filing evidence
2023-01-01 – 2023-03-311168200000 USD20230505Open filing evidence
2022-10-01 – 2023-03-312291800000 USD20230505Open filing evidence
2022-10-01 – 2022-12-311123600000 USD20230203Open filing evidence
2021-10-01 – 2022-09-305930200000 USD20231117Open filing evidence
2022-04-01 – 2022-06-301610300000 USD20230804Open filing evidence
2021-10-01 – 2022-06-304501000000 USD20230804Open filing evidence
2022-01-01 – 2022-03-311538100000 USD20230505Open filing evidence
2021-10-01 – 2022-03-312890700000 USD20230505Open filing evidence
2021-10-01 – 2021-12-311352600000 USD20230203Open filing evidence
2020-10-01 – 2021-09-304983000000 USD20231117Open filing evidence
2021-04-01 – 2021-06-301299200000 USD20220805Open filing evidence
2020-10-01 – 2021-06-303520700000 USD20220805Open filing evidence

Operating Segments · Unaffiliated Customers · Other Unallocated

Consolidation Items · Major Customers · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:MajorCustomersAxis=wrk:UnaffiliatedCustomersMember;us-gaap:StatementBusinessSegmentsAxis=wrk:OtherUnallocatedMember
PeriodValueUnitFiledEvidence
2022-10-01 – 2022-12-31101000000 USD20230203Open filing evidence

Operating Segments · CA · Consumer Packaging

Consolidation Items · Statement Geographical · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=country:CA;us-gaap:StatementBusinessSegmentsAxis=wrk:ConsumerPackagingMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-31126400000 USD20240503Open filing evidence
2023-10-01 – 2024-03-31243100000 USD20240503Open filing evidence
2023-10-01 – 2023-12-31116700000 USD20240202Open filing evidence
2022-10-01 – 2023-09-30516100000 USD20231117Open filing evidence
2023-01-01 – 2023-03-31134500000 USD20240503Open filing evidence
2022-10-01 – 2023-03-31258200000 USD20240503Open filing evidence
2022-10-01 – 2022-12-31123700000 USD20240202Open filing evidence
2021-10-01 – 2022-09-30510000000 USD20231117Open filing evidence
2020-10-01 – 2021-09-30473000000 USD20231117Open filing evidence

Operating Segments · CA · Corrugated Packaging

Consolidation Items · Statement Geographical · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=country:CA;us-gaap:StatementBusinessSegmentsAxis=wrk:CorrugatedPackagingMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-31127400000 USD20240503Open filing evidence
2023-10-01 – 2024-03-31262500000 USD20240503Open filing evidence
2023-10-01 – 2023-12-31135100000 USD20240202Open filing evidence
2023-01-01 – 2023-03-31138000000 USD20240503Open filing evidence
2022-10-01 – 2023-03-31275100000 USD20240503Open filing evidence
2022-10-01 – 2022-12-31137100000 USD20240202Open filing evidence

Operating Segments · CA · Global Paper

Consolidation Items · Statement Geographical · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=country:CA;us-gaap:StatementBusinessSegmentsAxis=wrk:GlobalPaperMember
PeriodValueUnitFiledEvidence
2022-10-01 – 2023-09-30204900000 USD20231117Open filing evidence
2021-10-01 – 2022-09-30227700000 USD20231117Open filing evidence
2020-10-01 – 2021-09-30205200000 USD20231117Open filing evidence

Operating Segments · US · Consumer Packaging

Consolidation Items · Statement Geographical · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=country:US;us-gaap:StatementBusinessSegmentsAxis=wrk:ConsumerPackagingMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-31629700000 USD20240503Open filing evidence
2023-10-01 – 2024-03-311223500000 USD20240503Open filing evidence
2023-10-01 – 2023-12-31593800000 USD20240202Open filing evidence
2022-10-01 – 2023-09-302843400000 USD20231117Open filing evidence
2023-01-01 – 2023-03-31741700000 USD20240503Open filing evidence
2022-10-01 – 2023-03-311444700000 USD20240503Open filing evidence
2022-10-01 – 2022-12-31703000000 USD20240202Open filing evidence
2021-10-01 – 2022-09-302870900000 USD20231117Open filing evidence
2020-10-01 – 2021-09-302463700000 USD20231117Open filing evidence

Operating Segments · US · Corrugated Packaging

Consolidation Items · Statement Geographical · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=country:US;us-gaap:StatementBusinessSegmentsAxis=wrk:CorrugatedPackagingMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-311773200000 USD20240503Open filing evidence
2023-10-01 – 2024-03-313569600000 USD20240503Open filing evidence
2023-10-01 – 2023-12-311796400000 USD20240202Open filing evidence
2023-01-01 – 2023-03-312001600000 USD20240503Open filing evidence
2022-10-01 – 2023-03-313975100000 USD20240503Open filing evidence
2022-10-01 – 2022-12-311973500000 USD20240202Open filing evidence

Operating Segments · US · Global Paper

Consolidation Items · Statement Geographical · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=country:US;us-gaap:StatementBusinessSegmentsAxis=wrk:GlobalPaperMember
PeriodValueUnitFiledEvidence
2022-10-01 – 2023-09-303946000000 USD20231117Open filing evidence
2021-10-01 – 2022-09-305344800000 USD20231117Open filing evidence
2020-10-01 – 2021-09-304547700000 USD20231117Open filing evidence

Operating Segments · Asia Pacific · Consumer Packaging

Consolidation Items · Statement Geographical · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=srt:AsiaPacificMember;us-gaap:StatementBusinessSegmentsAxis=wrk:ConsumerPackagingMember
PeriodValueUnitFiledEvidence
2022-10-01 – 2023-09-30300200000 USD20231117Open filing evidence
2021-10-01 – 2022-09-30310000000 USD20231117Open filing evidence
2020-10-01 – 2021-09-30299900000 USD20231117Open filing evidence

Operating Segments · Asia Pacific · Global Paper

Consolidation Items · Statement Geographical · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=srt:AsiaPacificMember;us-gaap:StatementBusinessSegmentsAxis=wrk:GlobalPaperMember
PeriodValueUnitFiledEvidence
2022-10-01 – 2023-09-3042000000 USD20231117Open filing evidence
2021-10-01 – 2022-09-3063800000 USD20231117Open filing evidence
2020-10-01 – 2021-09-3067300000 USD20231117Open filing evidence

Operating Segments · Latin America · Consumer Packaging

Consolidation Items · Statement Geographical · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=srt:LatinAmericaMember;us-gaap:StatementBusinessSegmentsAxis=wrk:ConsumerPackagingMember
PeriodValueUnitFiledEvidence
2022-10-01 – 2023-09-3080900000 USD20231117Open filing evidence
2021-10-01 – 2022-09-30194400000 USD20231117Open filing evidence
2020-10-01 – 2021-09-30159100000 USD20231117Open filing evidence

Operating Segments · Latin America · Corrugated Packaging

Consolidation Items · Statement Geographical · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=srt:LatinAmericaMember;us-gaap:StatementBusinessSegmentsAxis=wrk:CorrugatedPackagingMember
PeriodValueUnitFiledEvidence
2022-10-01 – 2023-09-301709500000 USD20231117Open filing evidence
2021-10-01 – 2022-09-30456400000 USD20231117Open filing evidence
2020-10-01 – 2021-09-30357300000 USD20231117Open filing evidence

Operating Segments · Latin America · Distribution Segment

Consolidation Items · Statement Geographical · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=srt:LatinAmericaMember;us-gaap:StatementBusinessSegmentsAxis=wrk:DistributionSegmentMember
PeriodValueUnitFiledEvidence
2022-10-01 – 2023-09-30176900000 USD20231117Open filing evidence
2021-10-01 – 2022-09-30164500000 USD20231117Open filing evidence
2020-10-01 – 2021-09-30129200000 USD20231117Open filing evidence

Operating Segments · Latin America · Global Paper

Consolidation Items · Statement Geographical · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=srt:LatinAmericaMember;us-gaap:StatementBusinessSegmentsAxis=wrk:GlobalPaperMember
PeriodValueUnitFiledEvidence
2022-10-01 – 2023-09-30129800000 USD20231117Open filing evidence
2021-10-01 – 2022-09-30230700000 USD20231117Open filing evidence
2020-10-01 – 2021-09-30100100000 USD20231117Open filing evidence

Operating Segments · EMEA · Consumer Packaging

Consolidation Items · Statement Geographical · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=us-gaap:EMEAMember;us-gaap:StatementBusinessSegmentsAxis=wrk:ConsumerPackagingMember
PeriodValueUnitFiledEvidence
2022-10-01 – 2023-09-301201200000 USD20231117Open filing evidence
2021-10-01 – 2022-09-301079900000 USD20231117Open filing evidence
2020-10-01 – 2021-09-301038200000 USD20231117Open filing evidence

Operating Segments · EMEA · Corrugated Packaging

Consolidation Items · Statement Geographical · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=us-gaap:EMEAMember;us-gaap:StatementBusinessSegmentsAxis=wrk:CorrugatedPackagingMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-311600000 USD20240503Open filing evidence
2023-10-01 – 2024-03-314600000 USD20240503Open filing evidence
2023-10-01 – 2023-12-313000000 USD20240202Open filing evidence
2023-01-01 – 2023-03-312800000 USD20240503Open filing evidence
2022-10-01 – 2023-03-314100000 USD20240503Open filing evidence
2022-10-01 – 2022-12-311300000 USD20240202Open filing evidence
2021-10-01 – 2022-09-307700000 USD20231117Open filing evidence
2020-10-01 – 2021-09-305100000 USD20231117Open filing evidence

Operating Segments · EMEA · Global Paper

Consolidation Items · Statement Geographical · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=us-gaap:EMEAMember;us-gaap:StatementBusinessSegmentsAxis=wrk:GlobalPaperMember
PeriodValueUnitFiledEvidence
2022-10-01 – 2023-09-3047200000 USD20231117Open filing evidence
2021-10-01 – 2022-09-3063200000 USD20231117Open filing evidence
2020-10-01 – 2021-09-3062700000 USD20231117Open filing evidence

Operating Segments · Consumer Packaging

Consolidation Items · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=wrk:ConsumerPackagingMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-311113500000 USD20240503Open filing evidence
2023-10-01 – 2024-03-312172800000 USD20240503Open filing evidence
2023-10-01 – 2023-12-311059300000 USD20240202Open filing evidence
2022-10-01 – 2023-09-304941800000 USD20231117Open filing evidence
2023-04-01 – 2023-06-301250600000 USD20230804Open filing evidence
2022-10-01 – 2023-06-303730700000 USD20230804Open filing evidence
2023-01-01 – 2023-03-311265100000 USD20240503Open filing evidence
2022-10-01 – 2023-03-312480100000 USD20240503Open filing evidence
2022-10-01 – 2022-12-311215000000 USD20240202Open filing evidence
2021-10-01 – 2022-09-304965200000 USD20231117Open filing evidence
2022-04-01 – 2022-06-301270200000 USD20230804Open filing evidence
2021-10-01 – 2022-06-303659500000 USD20230804Open filing evidence
2022-01-01 – 2022-03-311250600000 USD20230505Open filing evidence
2021-10-01 – 2022-03-312389300000 USD20230505Open filing evidence
2021-10-01 – 2021-12-311138700000 USD20230203Open filing evidence
2020-10-01 – 2021-09-304433900000 USD20231117Open filing evidence
2021-04-01 – 2021-06-301132200000 RestatedUSD20220805Open filing evidence
2020-10-01 – 2021-06-303275300000 RestatedUSD20220805Open filing evidence
2021-01-01 – 2021-03-311080600000 RestatedUSD20220506Open filing evidence
2020-10-01 – 2021-03-312143100000 RestatedUSD20220506Open filing evidence

Operating Segments · Consumer Packaging · Unaffiliated Customers

Consolidation Items · Statement Business Segments · Major Customers

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=wrk:ConsumerPackagingMember;srt:MajorCustomersAxis=wrk:UnaffiliatedCustomersMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-311105100000 USD20240503Open filing evidence
2023-10-01 – 2024-03-312159100000 USD20240503Open filing evidence
2023-10-01 – 2023-12-311054000000 USD20240202Open filing evidence
2023-01-01 – 2023-03-311257600000 USD20240503Open filing evidence
2022-10-01 – 2023-03-312467900000 USD20240503Open filing evidence
2022-10-01 – 2022-12-311210300000 USD20240202Open filing evidence
2021-04-01 – 2021-06-301671800000 USD20210809Open filing evidence
2020-10-01 – 2021-06-304773800000 USD20210809Open filing evidence
2021-01-01 – 2021-03-311543000000 USD20210507Open filing evidence
2020-10-01 – 2021-03-313102000000 USD20210507Open filing evidence

Operating Segments · Consumer Packaging · Asia Pacific

Consolidation Items · Statement Business Segments · Statement Geographical

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=wrk:ConsumerPackagingMember;srt:StatementGeographicalAxis=srt:AsiaPacificMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-3170100000 USD20240503Open filing evidence
2023-10-01 – 2024-03-31141900000 USD20240503Open filing evidence
2023-10-01 – 2023-12-3171800000 USD20240202Open filing evidence
2023-01-01 – 2023-03-3171900000 USD20240503Open filing evidence
2022-10-01 – 2023-03-31148600000 USD20240503Open filing evidence
2022-10-01 – 2022-12-3176700000 USD20240202Open filing evidence

Operating Segments · Consumer Packaging · Latin America

Consolidation Items · Statement Business Segments · Statement Geographical

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=wrk:ConsumerPackagingMember;srt:StatementGeographicalAxis=srt:LatinAmericaMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-31500000 USD20240503Open filing evidence
2023-10-01 – 2024-03-316600000 USD20240503Open filing evidence
2023-10-01 – 2023-12-316100000 USD20240202Open filing evidence
2023-01-01 – 2023-03-3112500000 USD20240503Open filing evidence
2022-10-01 – 2023-03-3164200000 USD20240503Open filing evidence
2022-10-01 – 2022-12-3151700000 USD20240202Open filing evidence

Operating Segments · Consumer Packaging · EMEA

Consolidation Items · Statement Business Segments · Statement Geographical

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=wrk:ConsumerPackagingMember;srt:StatementGeographicalAxis=us-gaap:EMEAMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-31286800000 USD20240503Open filing evidence
2023-10-01 – 2024-03-31557700000 USD20240503Open filing evidence
2023-10-01 – 2023-12-31270900000 USD20240202Open filing evidence
2023-01-01 – 2023-03-31304500000 USD20240503Open filing evidence
2022-10-01 – 2023-03-31564400000 USD20240503Open filing evidence
2022-10-01 – 2022-12-31259900000 USD20240202Open filing evidence

Operating Segments · Corrugated Packaging

Consolidation Items · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=wrk:CorrugatedPackagingMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-312398300000 USD20240503Open filing evidence
2023-10-01 – 2024-03-314818200000 USD20240503Open filing evidence
2023-10-01 – 2023-12-312419900000 USD20240202Open filing evidence
2022-10-01 – 2023-09-3010054900000 USD20231117Open filing evidence
2023-04-01 – 2023-06-302565700000 USD20230804Open filing evidence
2022-10-01 – 2023-06-307530500000 USD20230804Open filing evidence
2023-01-01 – 2023-03-312627400000 USD20240503Open filing evidence
2022-10-01 – 2023-03-314964800000 USD20240503Open filing evidence
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Operating Segments · Corrugated Packaging · Unaffiliated Customers

Consolidation Items · Statement Business Segments · Major Customers

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2021-01-01 – 2021-03-312894800000 USD20210507Open filing evidence
2020-10-01 – 2021-03-315737300000 USD20210507Open filing evidence

Operating Segments · Corrugated Packaging · CA

Consolidation Items · Statement Business Segments · Statement Geographical

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PeriodValueUnitFiledEvidence
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2021-10-01 – 2022-09-30578800000 USD20231117Open filing evidence
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Operating Segments · Corrugated Packaging · US

Consolidation Items · Statement Business Segments · Statement Geographical

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PeriodValueUnitFiledEvidence
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2021-10-01 – 2022-09-308264700000 USD20231117Open filing evidence
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Operating Segments · Corrugated Packaging · Latin America

Consolidation Items · Statement Business Segments · Statement Geographical

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2023-01-01 – 2023-03-31485000000 USD20240503Open filing evidence
2022-10-01 – 2023-03-31710500000 USD20240503Open filing evidence
2022-10-01 – 2022-12-31225500000 USD20240202Open filing evidence

Operating Segments · Corrugated Packaging · EMEA

Consolidation Items · Statement Business Segments · Statement Geographical

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PeriodValueUnitFiledEvidence
2022-10-01 – 2023-09-308700000 USD20231117Open filing evidence

Operating Segments · Distribution Segment

Consolidation Items · Statement Business Segments

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PeriodValueUnitFiledEvidence
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2021-01-01 – 2021-03-31280300000 USD20220506Open filing evidence
2020-10-01 – 2021-03-31584100000 USD20220506Open filing evidence

Operating Segments · Distribution Segment · Unaffiliated Customers

Consolidation Items · Statement Business Segments · Major Customers

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PeriodValueUnitFiledEvidence
2023-10-01 – 2023-12-31287000000 USD20240202Open filing evidence
2023-01-01 – 2023-03-31306000000 USD20240503Open filing evidence

Operating Segments · Distribution Segment · CA

Consolidation Items · Statement Business Segments · Statement Geographical

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PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-311000000 USD20240503Open filing evidence
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2023-10-01 – 2023-12-311200000 USD20240202Open filing evidence
2022-10-01 – 2023-09-3011100000 USD20231117Open filing evidence
2022-10-01 – 2023-03-316200000 USD20240503Open filing evidence
2021-10-01 – 2022-09-3016100000 USD20231117Open filing evidence
2020-10-01 – 2021-09-3019700000 USD20231117Open filing evidence

Operating Segments · Distribution Segment · US

Consolidation Items · Statement Business Segments · Statement Geographical

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PeriodValueUnitFiledEvidence
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2021-10-01 – 2022-09-301238300000 USD20231117Open filing evidence
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Operating Segments · Distribution Segment · Latin America

Consolidation Items · Statement Business Segments · Statement Geographical

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PeriodValueUnitFiledEvidence
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Operating Segments · Global Paper

Consolidation Items · Statement Business Segments

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PeriodValueUnitFiledEvidence
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2021-10-01 – 2022-06-304501000000 USD20230804Open filing evidence
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2020-10-01 – 2021-06-303520700000 USD20220805Open filing evidence

Operating Segments · Other Unallocated

Consolidation Items · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=wrk:OtherUnallocatedMember
PeriodValueUnitFiledEvidence
2022-10-01 – 2022-12-31102200000 USD20230203Open filing evidence

Operating Segments · Paper Segment

Consolidation Items · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=wrk:PaperSegmentMember
PeriodValueUnitFiledEvidence
2022-01-01 – 2022-03-311538100000 USD20220506Open filing evidence

Operating Segments · Paper Segment · Unaffiliated Customers

Consolidation Items · Statement Business Segments · Major Customers

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=wrk:PaperSegmentMember;srt:MajorCustomersAxis=wrk:UnaffiliatedCustomersMember
PeriodValueUnitFiledEvidence
2021-10-01 – 2021-12-311352600000 USD20220208Open filing evidence
2021-01-01 – 2021-03-311130600000 USD20220506Open filing evidence

CA · Consumer Packaging

Statement Geographical · Statement Business Segments

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PeriodValueUnitFiledEvidence
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2022-04-01 – 2022-06-30133500000 USD20230804Open filing evidence
2021-10-01 – 2022-06-30376200000 USD20230804Open filing evidence
2022-01-01 – 2022-03-31128400000 USD20230505Open filing evidence
2021-10-01 – 2022-03-31242700000 USD20230505Open filing evidence
2021-10-01 – 2021-12-31114300000 USD20230203Open filing evidence
2020-10-01 – 2021-09-30473000000 USD20221118Open filing evidence
2021-04-01 – 2021-06-30119600000 USD20220805Open filing evidence
2020-10-01 – 2021-06-30352400000 USD20220805Open filing evidence
2021-01-01 – 2021-03-31119400000 USD20220506Open filing evidence
2020-10-01 – 2021-03-31232800000 USD20220506Open filing evidence

CA · Global Paper

Statement Geographical · Statement Business Segments

Source dimensions srt:StatementGeographicalAxis=country:CA;us-gaap:StatementBusinessSegmentsAxis=wrk:GlobalPaperMember
PeriodValueUnitFiledEvidence
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2021-04-01 – 2021-06-3048500000 USD20220805Open filing evidence
2020-10-01 – 2021-06-30147100000 USD20220805Open filing evidence

US · Consumer Packaging

Statement Geographical · Statement Business Segments

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PeriodValueUnitFiledEvidence
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2020-10-01 – 2021-03-311204100000 USD20220506Open filing evidence

US · Global Paper

Statement Geographical · Statement Business Segments

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PeriodValueUnitFiledEvidence
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2020-10-01 – 2021-06-303215400000 USD20220805Open filing evidence

Asia Pacific · Consumer Packaging

Statement Geographical · Statement Business Segments

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PeriodValueUnitFiledEvidence
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2020-10-01 – 2021-03-31138600000 RestatedUSD20220506Open filing evidence

Asia Pacific · Corrugated Packaging

Statement Geographical · Statement Business Segments

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PeriodValueUnitFiledEvidence
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2020-10-01 – 2021-06-3048600000 USD20210809Open filing evidence
2021-01-01 – 2021-03-3118700000 USD20210507Open filing evidence
2020-10-01 – 2021-03-3131100000 USD20210507Open filing evidence

Asia Pacific · Global Paper

Statement Geographical · Statement Business Segments

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PeriodValueUnitFiledEvidence
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2020-10-01 – 2021-06-3048700000 USD20220805Open filing evidence

Europe · Consumer Packaging

Statement Geographical · Statement Business Segments

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PeriodValueUnitFiledEvidence
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2020-10-01 – 2021-03-31515200000 USD20210507Open filing evidence

Europe · Corrugated Packaging

Statement Geographical · Statement Business Segments

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PeriodValueUnitFiledEvidence
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2021-04-01 – 2021-06-301500000 USD20210809Open filing evidence
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2021-01-01 – 2021-03-311100000 USD20210507Open filing evidence
2020-10-01 – 2021-03-312000000 USD20210507Open filing evidence

Latin America · Consumer Packaging

Statement Geographical · Statement Business Segments

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PeriodValueUnitFiledEvidence
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2020-10-01 – 2021-09-30159100000 USD20221118Open filing evidence
2021-04-01 – 2021-06-3035700000 USD20220805Open filing evidence
2020-10-01 – 2021-06-30120500000 USD20220805Open filing evidence
2021-01-01 – 2021-03-3144900000 USD20220506Open filing evidence
2020-10-01 – 2021-03-3184800000 USD20220506Open filing evidence

Latin America · Corrugated Packaging

Statement Geographical · Statement Business Segments

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PeriodValueUnitFiledEvidence
2023-04-01 – 2023-06-30502600000 USD20230804Open filing evidence
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2020-10-01 – 2021-09-30357300000 USD20221118Open filing evidence
2021-04-01 – 2021-06-3095200000 USD20220805Open filing evidence
2020-10-01 – 2021-06-30243300000 USD20220805Open filing evidence
2021-01-01 – 2021-03-3177800000 USD20220506Open filing evidence
2020-10-01 – 2021-03-31148100000 USD20220506Open filing evidence

Latin America · Distribution Segment

Statement Geographical · Statement Business Segments

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PeriodValueUnitFiledEvidence
2023-04-01 – 2023-06-3045500000 USD20230804Open filing evidence
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2023-01-01 – 2023-03-3144200000 USD20230505Open filing evidence
2022-10-01 – 2023-03-3185600000 USD20230505Open filing evidence
2022-10-01 – 2022-12-3141400000 USD20230203Open filing evidence
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2021-10-01 – 2022-03-3176100000 USD20230505Open filing evidence
2021-10-01 – 2021-12-3136700000 USD20230203Open filing evidence
2020-10-01 – 2021-09-30129200000 USD20221118Open filing evidence
2021-04-01 – 2021-06-3032300000 USD20220805Open filing evidence
2020-10-01 – 2021-06-3094100000 USD20220805Open filing evidence
2021-01-01 – 2021-03-3130600000 USD20220506Open filing evidence
2020-10-01 – 2021-03-3161800000 USD20220506Open filing evidence

Latin America · Global Paper

Statement Geographical · Statement Business Segments

Source dimensions srt:StatementGeographicalAxis=srt:LatinAmericaMember;us-gaap:StatementBusinessSegmentsAxis=wrk:GlobalPaperMember
PeriodValueUnitFiledEvidence
2023-04-01 – 2023-06-3036300000 USD20230804Open filing evidence
2022-10-01 – 2023-06-30105000000 USD20230804Open filing evidence
2023-01-01 – 2023-03-3135100000 USD20230505Open filing evidence
2022-10-01 – 2023-03-3168700000 USD20230505Open filing evidence
2022-10-01 – 2022-12-3133600000 USD20230203Open filing evidence
2021-10-01 – 2022-09-30230700000 USD20221118Open filing evidence
2022-04-01 – 2022-06-3064700000 USD20230804Open filing evidence
2021-10-01 – 2022-06-30178000000 USD20230804Open filing evidence
2022-01-01 – 2022-03-3165000000 USD20230505Open filing evidence
2021-10-01 – 2022-03-31113300000 USD20230505Open filing evidence
2021-10-01 – 2021-12-3148300000 USD20230203Open filing evidence
2020-10-01 – 2021-09-30100100000 USD20221118Open filing evidence
2021-04-01 – 2021-06-3032100000 USD20220805Open filing evidence
2020-10-01 – 2021-06-3061200000 USD20220805Open filing evidence

Latin America · Other Unallocated

Statement Geographical · Statement Business Segments

Source dimensions srt:StatementGeographicalAxis=srt:LatinAmericaMember;us-gaap:StatementBusinessSegmentsAxis=wrk:OtherUnallocatedMember
PeriodValueUnitFiledEvidence
2022-10-01 – 2022-12-31102200000 USD20230203Open filing evidence

North America · Consumer Packaging

Statement Geographical · Statement Business Segments

Source dimensions srt:StatementGeographicalAxis=srt:NorthAmericaMember;us-gaap:StatementBusinessSegmentsAxis=wrk:ConsumerPackagingMember
PeriodValueUnitFiledEvidence
2020-10-01 – 2021-09-305218300000 USD20211119Open filing evidence
2021-04-01 – 2021-06-301353900000 USD20210809Open filing evidence
2020-10-01 – 2021-06-303839600000 USD20210809Open filing evidence
2021-01-01 – 2021-03-311231700000 USD20210507Open filing evidence
2020-10-01 – 2021-03-312485700000 USD20210507Open filing evidence

North America · Corrugated Packaging

Statement Geographical · Statement Business Segments

Source dimensions srt:StatementGeographicalAxis=srt:NorthAmericaMember;us-gaap:StatementBusinessSegmentsAxis=wrk:CorrugatedPackagingMember
PeriodValueUnitFiledEvidence
2020-10-01 – 2021-09-3011813700000 USD20211119Open filing evidence
2021-04-01 – 2021-06-303020900000 USD20210809Open filing evidence
2020-10-01 – 2021-06-308588200000 USD20210809Open filing evidence
2021-01-01 – 2021-03-312797100000 USD20210507Open filing evidence
2020-10-01 – 2021-03-315567300000 USD20210507Open filing evidence

South America · Consumer Packaging

Statement Geographical · Statement Business Segments

Source dimensions srt:StatementGeographicalAxis=srt:SouthAmericaMember;us-gaap:StatementBusinessSegmentsAxis=wrk:ConsumerPackagingMember
PeriodValueUnitFiledEvidence
2020-10-01 – 2021-09-3082500000 USD20211119Open filing evidence
2021-04-01 – 2021-06-3017700000 USD20210809Open filing evidence
2020-10-01 – 2021-06-3063000000 USD20210809Open filing evidence
2021-01-01 – 2021-03-3123100000 USD20210507Open filing evidence
2020-10-01 – 2021-03-3145300000 USD20210507Open filing evidence

South America · Corrugated Packaging

Statement Geographical · Statement Business Segments

Source dimensions srt:StatementGeographicalAxis=srt:SouthAmericaMember;us-gaap:StatementBusinessSegmentsAxis=wrk:CorrugatedPackagingMember
PeriodValueUnitFiledEvidence
2020-10-01 – 2021-09-30457600000 USD20211119Open filing evidence
2021-04-01 – 2021-06-30127200000 USD20210809Open filing evidence
2020-10-01 – 2021-06-30304700000 USD20210809Open filing evidence
2021-01-01 – 2021-03-3196500000 USD20210507Open filing evidence
2020-10-01 – 2021-03-31177500000 USD20210507Open filing evidence

EMEA · Consumer Packaging

Statement Geographical · Statement Business Segments

Source dimensions srt:StatementGeographicalAxis=us-gaap:EMEAMember;us-gaap:StatementBusinessSegmentsAxis=wrk:ConsumerPackagingMember
PeriodValueUnitFiledEvidence
2023-04-01 – 2023-06-30314100000 USD20230804Open filing evidence
2022-10-01 – 2023-06-30878500000 USD20230804Open filing evidence
2023-01-01 – 2023-03-31304500000 USD20230505Open filing evidence
2022-10-01 – 2023-03-31564400000 USD20230505Open filing evidence
2022-10-01 – 2022-12-31259900000 USD20230203Open filing evidence
2021-10-01 – 2022-09-301079900000 USD20221118Open filing evidence
2022-04-01 – 2022-06-30270800000 USD20230804Open filing evidence
2021-10-01 – 2022-06-30799900000 USD20230804Open filing evidence
2022-01-01 – 2022-03-31277000000 USD20230505Open filing evidence
2021-10-01 – 2022-03-31529100000 USD20230505Open filing evidence
2021-10-01 – 2021-12-31252100000 USD20230203Open filing evidence
2020-10-01 – 2021-09-301038200000 USD20221118Open filing evidence
2021-04-01 – 2021-06-30269500000 USD20220805Open filing evidence
2020-10-01 – 2021-06-30752300000 USD20220805Open filing evidence
2020-10-01 – 2021-03-31482800000 USD20220506Open filing evidence

EMEA · Corrugated Packaging

Statement Geographical · Statement Business Segments

Source dimensions srt:StatementGeographicalAxis=us-gaap:EMEAMember;us-gaap:StatementBusinessSegmentsAxis=wrk:CorrugatedPackagingMember
PeriodValueUnitFiledEvidence
2022-10-01 – 2023-06-305500000 USD20230804Open filing evidence
2023-01-01 – 2023-03-312800000 USD20230505Open filing evidence
2022-10-01 – 2022-12-311300000 USD20230203Open filing evidence
2021-10-01 – 2022-06-306300000 USD20230804Open filing evidence
2022-01-01 – 2022-03-31300000 USD20230505Open filing evidence
2021-10-01 – 2022-03-313300000 USD20230505Open filing evidence
2021-10-01 – 2021-12-313000000 USD20220208Open filing evidence

EMEA · Global Paper

Statement Geographical · Statement Business Segments

Source dimensions srt:StatementGeographicalAxis=us-gaap:EMEAMember;us-gaap:StatementBusinessSegmentsAxis=wrk:GlobalPaperMember
PeriodValueUnitFiledEvidence
2023-04-01 – 2023-06-3012300000 USD20230804Open filing evidence
2022-10-01 – 2023-06-3034800000 USD20230804Open filing evidence
2023-01-01 – 2023-03-3111400000 USD20230505Open filing evidence
2022-10-01 – 2023-03-3122500000 USD20230505Open filing evidence
2022-10-01 – 2022-12-3111100000 USD20230203Open filing evidence
2021-10-01 – 2022-09-3063200000 USD20221118Open filing evidence
2022-04-01 – 2022-06-3017600000 USD20230804Open filing evidence
2021-10-01 – 2022-06-3051100000 USD20230804Open filing evidence
2022-01-01 – 2022-03-3117600000 USD20230505Open filing evidence
2021-10-01 – 2022-03-3133500000 USD20230505Open filing evidence
2021-10-01 – 2021-12-3115900000 USD20230203Open filing evidence
2020-10-01 – 2021-09-3062700000 USD20221118Open filing evidence
2021-04-01 – 2021-06-3016000000 USD20220805Open filing evidence
2020-10-01 – 2021-06-3048300000 USD20220805Open filing evidence

Consumer Packaging

Statement Business Segments

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:ConsumerPackagingMember
PeriodValueUnitFiledEvidence
2023-04-01 – 2023-06-301250600000 USD20230804Open filing evidence
2022-10-01 – 2023-06-303730700000 USD20230804Open filing evidence
2023-01-01 – 2023-03-311265100000 USD20230505Open filing evidence
2022-10-01 – 2023-03-312480100000 USD20230505Open filing evidence
2022-10-01 – 2022-12-311215000000 USD20230203Open filing evidence
2021-10-01 – 2022-09-304965200000 USD20221118Open filing evidence
2022-04-01 – 2022-06-301270200000 USD20230804Open filing evidence
2021-10-01 – 2022-06-303659500000 USD20230804Open filing evidence
2022-01-01 – 2022-03-311250600000 USD20230505Open filing evidence
2021-10-01 – 2022-03-312389300000 USD20230505Open filing evidence
2021-10-01 – 2021-12-311138700000 USD20230203Open filing evidence
2020-10-01 – 2021-09-304433900000 RestatedUSD20221118Open filing evidence
2021-04-01 – 2021-06-301132200000 RestatedUSD20220805Open filing evidence
2020-10-01 – 2021-06-303275300000 RestatedUSD20220805Open filing evidence

Consumer Packaging · Intersegment Elimination

Statement Business Segments · Consolidation Items

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:ConsumerPackagingMember;srt:ConsolidationItemsAxis=us-gaap:IntersegmentEliminationMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-31-8400000 USD20240503Open filing evidence
2023-10-01 – 2024-03-31-13700000 USD20240503Open filing evidence
2023-10-01 – 2023-12-31-5300000 USD20240202Open filing evidence
2023-01-01 – 2023-03-31-7500000 USD20240503Open filing evidence
2022-10-01 – 2023-03-31-12200000 USD20240503Open filing evidence
2022-10-01 – 2022-12-31-4700000 USD20240202Open filing evidence
2020-10-01 – 2021-09-30-213100000 USD20211119Open filing evidence

Consumer Packaging · Operating Segments

Statement Business Segments · Consolidation Items

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:ConsumerPackagingMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2020-10-01 – 2021-09-306702700000 USD20211119Open filing evidence

Consumer Packaging · Operating Segments · Unaffiliated Customers

Statement Business Segments · Consolidation Items · Major Customers

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:ConsumerPackagingMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:MajorCustomersAxis=wrk:UnaffiliatedCustomersMember
PeriodValueUnitFiledEvidence
2020-10-01 – 2021-09-306489600000 USD20211119Open filing evidence

Corrugated Packaging

Statement Business Segments

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:CorrugatedPackagingMember
PeriodValueUnitFiledEvidence
2023-04-01 – 2023-06-302565700000 USD20230804Open filing evidence
2022-10-01 – 2023-06-307530500000 USD20230804Open filing evidence
2023-01-01 – 2023-03-312627400000 USD20230505Open filing evidence
2022-10-01 – 2023-03-314964800000 USD20230505Open filing evidence
2022-10-01 – 2022-12-312235200000 USD20230203Open filing evidence
2021-10-01 – 2022-09-309307600000 USD20221118Open filing evidence
2022-04-01 – 2022-06-302382500000 USD20230804Open filing evidence
2021-10-01 – 2022-06-306921500000 USD20230804Open filing evidence
2022-01-01 – 2022-03-312319000000 USD20230505Open filing evidence
2021-10-01 – 2022-03-314539000000 USD20230505Open filing evidence
2021-10-01 – 2021-12-312220000000 USD20230203Open filing evidence
2020-10-01 – 2021-09-308400500000 RestatedUSD20221118Open filing evidence
2021-04-01 – 2021-06-302154700000 RestatedUSD20220805Open filing evidence
2020-10-01 – 2021-06-306196600000 RestatedUSD20220805Open filing evidence

Corrugated Packaging · Intersegment Elimination

Statement Business Segments · Consolidation Items

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:CorrugatedPackagingMember;srt:ConsolidationItemsAxis=us-gaap:IntersegmentEliminationMember
PeriodValueUnitFiledEvidence
2022-10-01 – 2023-09-30-280300000 USD20231117Open filing evidence
2023-04-01 – 2023-06-30-69500000 USD20230804Open filing evidence
2022-10-01 – 2023-06-30-219500000 USD20230804Open filing evidence
2023-01-01 – 2023-03-31-81600000 USD20230505Open filing evidence
2022-10-01 – 2023-03-31-150000000 USD20230505Open filing evidence
2022-10-01 – 2022-12-31-67200000 USD20230203Open filing evidence
2021-10-01 – 2022-09-30-328000000 USD20231117Open filing evidence
2022-04-01 – 2022-06-30-93500000 USD20230804Open filing evidence
2021-10-01 – 2022-06-30-246200000 USD20230804Open filing evidence
2022-01-01 – 2022-03-31-78500000 USD20230505Open filing evidence
2021-10-01 – 2022-03-31-152700000 USD20230505Open filing evidence
2021-10-01 – 2021-12-31-74200000 USD20230203Open filing evidence
2020-10-01 – 2021-09-30-305300000 RestatedUSD20231117Open filing evidence
2021-04-01 – 2021-06-30-86900000 USD20220805Open filing evidence
2020-10-01 – 2021-06-30-229900000 USD20220805Open filing evidence

Corrugated Packaging · Operating Segments

Statement Business Segments · Consolidation Items

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:CorrugatedPackagingMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2020-10-01 – 2021-09-3012343700000 USD20211119Open filing evidence

Corrugated Packaging · Operating Segments · Unaffiliated Customers

Statement Business Segments · Consolidation Items · Major Customers

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:CorrugatedPackagingMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:MajorCustomersAxis=wrk:UnaffiliatedCustomersMember
PeriodValueUnitFiledEvidence
2020-10-01 – 2021-09-3012256500000 USD20211119Open filing evidence

Corrugated Packaging · CA

Statement Business Segments · Statement Geographical

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:CorrugatedPackagingMember;srt:StatementGeographicalAxis=country:CA
PeriodValueUnitFiledEvidence
2023-04-01 – 2023-06-30138600000 USD20230804Open filing evidence
2022-10-01 – 2023-06-30413700000 USD20230804Open filing evidence
2023-01-01 – 2023-03-31138000000 USD20230505Open filing evidence
2022-10-01 – 2023-03-31275100000 USD20230505Open filing evidence
2022-10-01 – 2022-12-31137100000 USD20230203Open filing evidence
2021-10-01 – 2022-09-30578800000 USD20221118Open filing evidence
2022-04-01 – 2022-06-30149500000 USD20230804Open filing evidence
2021-10-01 – 2022-06-30435800000 USD20230804Open filing evidence
2022-01-01 – 2022-03-31145900000 USD20230505Open filing evidence
2021-10-01 – 2022-03-31286300000 USD20230505Open filing evidence
2021-10-01 – 2021-12-31140400000 USD20230203Open filing evidence
2020-10-01 – 2021-09-30519300000 USD20221118Open filing evidence
2021-04-01 – 2021-06-30127600000 USD20220805Open filing evidence
2020-10-01 – 2021-06-30378800000 USD20220805Open filing evidence

Corrugated Packaging · US

Statement Business Segments · Statement Geographical

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:CorrugatedPackagingMember;srt:StatementGeographicalAxis=country:US
PeriodValueUnitFiledEvidence
2023-04-01 – 2023-06-301923100000 USD20230804Open filing evidence
2022-10-01 – 2023-06-305898200000 USD20230804Open filing evidence
2023-01-01 – 2023-03-312001600000 USD20230505Open filing evidence
2022-10-01 – 2023-03-313975100000 USD20230505Open filing evidence
2022-10-01 – 2022-12-311973500000 USD20230203Open filing evidence
2021-10-01 – 2022-09-308264700000 USD20221118Open filing evidence
2022-04-01 – 2022-06-302111900000 USD20230804Open filing evidence
2021-10-01 – 2022-06-306149000000 USD20230804Open filing evidence
2022-01-01 – 2022-03-312068100000 USD20230505Open filing evidence
2021-10-01 – 2022-03-314037100000 USD20230505Open filing evidence
2021-10-01 – 2021-12-311969000000 USD20230203Open filing evidence
2020-10-01 – 2021-09-307518800000 USD20221118Open filing evidence
2021-04-01 – 2021-06-301930400000 USD20220805Open filing evidence
2020-10-01 – 2021-06-305571000000 USD20220805Open filing evidence

Corrugated Packaging · EMEA

Statement Business Segments · Statement Geographical

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:CorrugatedPackagingMember;srt:StatementGeographicalAxis=us-gaap:EMEAMember
PeriodValueUnitFiledEvidence
2023-04-01 – 2023-06-301400000 USD20230804Open filing evidence
2022-10-01 – 2023-03-314100000 USD20230505Open filing evidence
2021-10-01 – 2022-09-307700000 USD20221118Open filing evidence
2022-04-01 – 2022-06-303000000 USD20230804Open filing evidence
2021-10-01 – 2022-06-306300000 USD20220805Open filing evidence
2022-01-01 – 2022-03-31300000 USD20220506Open filing evidence
2021-10-01 – 2022-03-313300000 USD20220506Open filing evidence
2021-10-01 – 2021-12-313000000 USD20230203Open filing evidence
2020-10-01 – 2021-09-305100000 USD20221118Open filing evidence
2021-04-01 – 2021-06-301500000 USD20220805Open filing evidence
2020-10-01 – 2021-06-303500000 USD20220805Open filing evidence

Distribution Segment

Statement Business Segments

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:DistributionSegmentMember
PeriodValueUnitFiledEvidence
2023-04-01 – 2023-06-30317800000 USD20230804Open filing evidence
2022-10-01 – 2023-06-30946600000 USD20230804Open filing evidence
2023-01-01 – 2023-03-31307300000 USD20230505Open filing evidence
2022-10-01 – 2023-03-31628800000 USD20230505Open filing evidence
2022-10-01 – 2022-12-31321500000 USD20230203Open filing evidence
2021-10-01 – 2022-09-301418900000 USD20221118Open filing evidence
2022-04-01 – 2022-06-30357700000 USD20230804Open filing evidence
2021-10-01 – 2022-06-301044800000 USD20230804Open filing evidence
2022-01-01 – 2022-03-31362300000 USD20230505Open filing evidence
2021-10-01 – 2022-03-31687100000 USD20230505Open filing evidence
2021-10-01 – 2021-12-31324800000 USD20230203Open filing evidence
2020-10-01 – 2021-09-301254800000 USD20221118Open filing evidence
2021-04-01 – 2021-06-30322300000 USD20220805Open filing evidence
2020-10-01 – 2021-06-30906400000 USD20220805Open filing evidence

Distribution Segment · Intersegment Elimination

Statement Business Segments · Consolidation Items

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:DistributionSegmentMember;srt:ConsolidationItemsAxis=us-gaap:IntersegmentEliminationMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-31-2000000 USD20240503Open filing evidence
2023-10-01 – 2024-03-31-4700000 USD20240503Open filing evidence
2023-10-01 – 2023-12-31-2700000 USD20240202Open filing evidence
2022-10-01 – 2023-09-30-6300000 USD20231117Open filing evidence
2023-04-01 – 2023-06-30-1500000 USD20230804Open filing evidence
2022-10-01 – 2023-06-30-4100000 USD20230804Open filing evidence
2023-01-01 – 2023-03-31-1300000 USD20240503Open filing evidence
2022-10-01 – 2023-03-31-2600000 USD20240503Open filing evidence
2022-10-01 – 2022-12-31-1300000 USD20240202Open filing evidence
2021-10-01 – 2022-09-30-9600000 USD20231117Open filing evidence
2022-04-01 – 2022-06-30-1400000 USD20230804Open filing evidence
2021-10-01 – 2022-06-30-7600000 USD20230804Open filing evidence
2022-01-01 – 2022-03-31-2500000 USD20230505Open filing evidence
2021-10-01 – 2022-03-31-6200000 USD20230505Open filing evidence
2021-10-01 – 2021-12-31-3700000 USD20230203Open filing evidence
2020-10-01 – 2021-09-30-500000 USD20231117Open filing evidence
2021-04-01 – 2021-06-30-200000 USD20220805Open filing evidence
2020-10-01 – 2021-06-30-500000 USD20220805Open filing evidence

Distribution Segment · Operating Segments

Statement Business Segments · Consolidation Items

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:DistributionSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2023-01-01 – 2023-03-31307300000 USD20240503Open filing evidence

Distribution Segment · Operating Segments · Unaffiliated Customers

Statement Business Segments · Consolidation Items · Major Customers

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:DistributionSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:MajorCustomersAxis=wrk:UnaffiliatedCustomersMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-31270000000 USD20240503Open filing evidence
2023-10-01 – 2024-03-31557000000 USD20240503Open filing evidence
2022-10-01 – 2023-03-31626200000 USD20240503Open filing evidence
2022-10-01 – 2022-12-31320200000 USD20240202Open filing evidence

Distribution Segment · Operating Segments · CA

Statement Business Segments · Consolidation Items · Statement Geographical

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:DistributionSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=country:CA
PeriodValueUnitFiledEvidence
2023-01-01 – 2023-03-312800000 USD20240503Open filing evidence
2022-10-01 – 2022-12-313400000 USD20240202Open filing evidence

Distribution Segment · Operating Segments · US

Statement Business Segments · Consolidation Items · Statement Geographical

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:DistributionSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=country:US
PeriodValueUnitFiledEvidence
2023-10-01 – 2023-12-31248100000 USD20240202Open filing evidence
2023-01-01 – 2023-03-31260300000 USD20240503Open filing evidence
2022-10-01 – 2023-03-31537000000 USD20240503Open filing evidence
2022-10-01 – 2022-12-31276700000 USD20240202Open filing evidence

Distribution Segment · Operating Segments · Latin America

Statement Business Segments · Consolidation Items · Statement Geographical

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:DistributionSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=srt:LatinAmericaMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-3142000000 USD20240503Open filing evidence
2023-10-01 – 2024-03-3182400000 USD20240503Open filing evidence
2023-10-01 – 2023-12-3140400000 USD20240202Open filing evidence

Distribution Segment · CA

Statement Business Segments · Statement Geographical

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:DistributionSegmentMember;srt:StatementGeographicalAxis=country:CA
PeriodValueUnitFiledEvidence
2023-04-01 – 2023-06-302900000 USD20230804Open filing evidence
2022-10-01 – 2023-06-309100000 USD20230804Open filing evidence
2023-01-01 – 2023-03-312800000 USD20230505Open filing evidence
2022-10-01 – 2023-03-316200000 USD20230505Open filing evidence
2022-10-01 – 2022-12-313400000 USD20230203Open filing evidence
2021-10-01 – 2022-09-3016100000 USD20221118Open filing evidence
2022-04-01 – 2022-06-304800000 USD20230804Open filing evidence
2021-10-01 – 2022-06-3012100000 USD20230804Open filing evidence
2022-01-01 – 2022-03-313800000 USD20230505Open filing evidence
2021-10-01 – 2022-03-317300000 USD20230505Open filing evidence
2021-10-01 – 2021-12-313500000 USD20230203Open filing evidence
2020-10-01 – 2021-09-3019700000 USD20221118Open filing evidence
2021-04-01 – 2021-06-306400000 USD20220805Open filing evidence
2020-10-01 – 2021-06-3013600000 USD20220805Open filing evidence

Distribution Segment · US

Statement Business Segments · Statement Geographical

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:DistributionSegmentMember;srt:StatementGeographicalAxis=country:US
PeriodValueUnitFiledEvidence
2023-04-01 – 2023-06-30269400000 USD20230804Open filing evidence
2022-10-01 – 2023-06-30806400000 USD20230804Open filing evidence
2023-01-01 – 2023-03-31260300000 USD20230505Open filing evidence
2022-10-01 – 2023-03-31537000000 USD20230505Open filing evidence
2022-10-01 – 2022-12-31276700000 USD20230203Open filing evidence
2021-10-01 – 2022-09-301238300000 USD20221118Open filing evidence
2022-04-01 – 2022-06-30310600000 USD20230804Open filing evidence
2021-10-01 – 2022-06-30914300000 USD20230804Open filing evidence
2022-01-01 – 2022-03-31319100000 USD20230505Open filing evidence
2021-10-01 – 2022-03-31603700000 USD20230505Open filing evidence
2021-10-01 – 2021-12-31284600000 USD20230203Open filing evidence
2020-10-01 – 2021-09-301105900000 USD20221118Open filing evidence
2021-04-01 – 2021-06-30283600000 USD20220805Open filing evidence
2020-10-01 – 2021-06-30798700000 USD20220805Open filing evidence

Global Paper

Statement Business Segments

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:GlobalPaperMember
PeriodValueUnitFiledEvidence
2023-04-01 – 2023-06-301065700000 USD20230804Open filing evidence
2022-10-01 – 2023-06-303357500000 USD20230804Open filing evidence
2023-01-01 – 2023-03-311168200000 USD20230505Open filing evidence
2022-10-01 – 2023-03-312291800000 USD20230505Open filing evidence
2022-10-01 – 2022-12-311123600000 USD20230203Open filing evidence
2021-10-01 – 2022-09-305930200000 USD20221118Open filing evidence
2022-04-01 – 2022-06-301610300000 USD20230804Open filing evidence
2021-10-01 – 2022-06-304501000000 USD20230804Open filing evidence
2022-01-01 – 2022-03-311538100000 USD20230505Open filing evidence
2021-10-01 – 2022-03-312890700000 USD20230505Open filing evidence
2021-10-01 – 2021-12-311352600000 USD20230203Open filing evidence
2020-10-01 – 2021-09-304983000000 USD20221118Open filing evidence
2021-04-01 – 2021-06-301299200000 USD20220805Open filing evidence
2020-10-01 – 2021-06-303520700000 USD20220805Open filing evidence

Global Paper · Operating Segments

Statement Business Segments · Consolidation Items

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:GlobalPaperMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-311016200000 USD20240503Open filing evidence
2023-10-01 – 2024-03-311934500000 USD20240503Open filing evidence
2023-10-01 – 2023-12-31918300000 USD20240202Open filing evidence
2023-01-01 – 2023-03-311168200000 USD20240503Open filing evidence
2022-10-01 – 2023-03-312291800000 USD20240503Open filing evidence
2022-10-01 – 2022-12-311123600000 USD20240202Open filing evidence

Global Paper · Operating Segments · Unaffiliated Customers

Statement Business Segments · Consolidation Items · Major Customers

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:GlobalPaperMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:MajorCustomersAxis=wrk:UnaffiliatedCustomersMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-311016200000 USD20240503Open filing evidence
2023-10-01 – 2024-03-311934500000 USD20240503Open filing evidence
2023-10-01 – 2023-12-31918300000 USD20240202Open filing evidence
2023-01-01 – 2023-03-311168200000 USD20240503Open filing evidence
2022-10-01 – 2023-03-312291800000 USD20240503Open filing evidence
2022-10-01 – 2022-12-311123600000 USD20240202Open filing evidence

Global Paper · Operating Segments · CA

Statement Business Segments · Consolidation Items · Statement Geographical

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:GlobalPaperMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=country:CA
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-3163900000 USD20240503Open filing evidence
2023-10-01 – 2024-03-31115000000 USD20240503Open filing evidence
2023-10-01 – 2023-12-3151100000 USD20240202Open filing evidence
2023-01-01 – 2023-03-3154400000 USD20240503Open filing evidence
2022-10-01 – 2023-03-3199900000 USD20240503Open filing evidence
2022-10-01 – 2022-12-3145500000 USD20240202Open filing evidence

Global Paper · Operating Segments · US

Statement Business Segments · Consolidation Items · Statement Geographical

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:GlobalPaperMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=country:US
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-31901300000 USD20240503Open filing evidence
2023-10-01 – 2024-03-311721800000 USD20240503Open filing evidence
2023-10-01 – 2023-12-31820500000 USD20240202Open filing evidence
2023-01-01 – 2023-03-311056300000 USD20240503Open filing evidence
2022-10-01 – 2023-03-312079000000 USD20240503Open filing evidence
2022-10-01 – 2022-12-311022700000 USD20240202Open filing evidence

Global Paper · Operating Segments · Asia Pacific

Statement Business Segments · Consolidation Items · Statement Geographical

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:GlobalPaperMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=srt:AsiaPacificMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-3112200000 USD20240503Open filing evidence
2023-10-01 – 2024-03-3123500000 USD20240503Open filing evidence
2023-10-01 – 2023-12-3111300000 USD20240202Open filing evidence
2023-01-01 – 2023-03-3111000000 USD20240503Open filing evidence
2022-10-01 – 2023-03-3121700000 USD20240503Open filing evidence
2022-10-01 – 2022-12-3110700000 USD20240202Open filing evidence

Global Paper · Operating Segments · Latin America

Statement Business Segments · Consolidation Items · Statement Geographical

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:GlobalPaperMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=srt:LatinAmericaMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-3126700000 USD20240503Open filing evidence
2023-10-01 – 2024-03-3150200000 USD20240503Open filing evidence
2023-10-01 – 2023-12-3123500000 USD20240202Open filing evidence
2023-01-01 – 2023-03-3135100000 USD20240503Open filing evidence
2022-10-01 – 2023-03-3168700000 USD20240503Open filing evidence
2022-10-01 – 2022-12-3133600000 USD20240202Open filing evidence

Global Paper · Operating Segments · EMEA

Statement Business Segments · Consolidation Items · Statement Geographical

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:GlobalPaperMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:StatementGeographicalAxis=us-gaap:EMEAMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-3112100000 USD20240503Open filing evidence
2023-10-01 – 2024-03-3124000000 USD20240503Open filing evidence
2023-10-01 – 2023-12-3111900000 USD20240202Open filing evidence
2023-01-01 – 2023-03-3111400000 USD20240503Open filing evidence
2022-10-01 – 2023-03-3122500000 USD20240503Open filing evidence
2022-10-01 – 2022-12-3111100000 USD20240202Open filing evidence

Other Unallocated

Statement Business Segments

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:OtherUnallocatedMember
PeriodValueUnitFiledEvidence
2022-10-01 – 2022-12-31102200000 USD20230203Open filing evidence

Paper Segment

Statement Business Segments

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:PaperSegmentMember
PeriodValueUnitFiledEvidence
2022-01-01 – 2022-03-311538100000 USD20220506Open filing evidence
2021-10-01 – 2022-03-312890700000 USD20220506Open filing evidence
2021-10-01 – 2021-12-311352600000 USD20220208Open filing evidence

Paper Segment · Operating Segments

Statement Business Segments · Consolidation Items

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:PaperSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2021-10-01 – 2022-03-312890700000 USD20220506Open filing evidence
2021-10-01 – 2021-12-311352600000 USD20220208Open filing evidence

Paper Segment · Operating Segments · Unaffiliated Customers

Statement Business Segments · Consolidation Items · Major Customers

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:PaperSegmentMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:MajorCustomersAxis=wrk:UnaffiliatedCustomersMember
PeriodValueUnitFiledEvidence
2022-01-01 – 2022-03-311538100000 USD20220506Open filing evidence
2021-10-01 – 2022-03-312890700000 USD20220506Open filing evidence

Paper Segment · CA

Statement Business Segments · Statement Geographical

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:PaperSegmentMember;srt:StatementGeographicalAxis=country:CA
PeriodValueUnitFiledEvidence
2022-01-01 – 2022-03-3162200000 USD20220506Open filing evidence
2021-10-01 – 2022-03-31120100000 USD20220506Open filing evidence
2021-10-01 – 2021-12-3157900000 USD20220208Open filing evidence

Paper Segment · US

Statement Business Segments · Statement Geographical

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:PaperSegmentMember;srt:StatementGeographicalAxis=country:US
PeriodValueUnitFiledEvidence
2022-01-01 – 2022-03-311376300000 USD20220506Open filing evidence
2021-10-01 – 2022-03-312589400000 USD20220506Open filing evidence
2021-10-01 – 2021-12-311213100000 USD20220208Open filing evidence

Paper Segment · Asia Pacific

Statement Business Segments · Statement Geographical

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:PaperSegmentMember;srt:StatementGeographicalAxis=srt:AsiaPacificMember
PeriodValueUnitFiledEvidence
2022-01-01 – 2022-03-3117000000 USD20220506Open filing evidence
2021-10-01 – 2022-03-3134400000 USD20220506Open filing evidence
2021-10-01 – 2021-12-3117400000 USD20220208Open filing evidence

Paper Segment · Latin America

Statement Business Segments · Statement Geographical

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:PaperSegmentMember;srt:StatementGeographicalAxis=srt:LatinAmericaMember
PeriodValueUnitFiledEvidence
2022-01-01 – 2022-03-3165000000 USD20220506Open filing evidence
2021-10-01 – 2022-03-31113300000 USD20220506Open filing evidence
2021-10-01 – 2021-12-3148300000 USD20220208Open filing evidence

Paper Segment · EMEA

Statement Business Segments · Statement Geographical

Source dimensions us-gaap:StatementBusinessSegmentsAxis=wrk:PaperSegmentMember;srt:StatementGeographicalAxis=us-gaap:EMEAMember
PeriodValueUnitFiledEvidence
2022-01-01 – 2022-03-3117600000 USD20220506Open filing evidence
2021-10-01 – 2022-03-3133500000 USD20220506Open filing evidence
2021-10-01 – 2021-12-3115900000 USD20220208Open filing evidence