Fundies.
English

Segment disclosures

Company overview

Compass Minerals International, Inc.

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

Revenue · Reported segment facts

115 dimension combinations 760 retained observations 23 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 · Plant Nutrition

Consolidation Items · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:IntersegmentEliminationMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-303400000 USD20260806Open filing evidence
2025-10-01 – 2026-06-306400000 USD20260806Open filing evidence
2026-01-01 – 2026-03-312000000 USD20260507Open filing evidence
2025-10-01 – 2026-03-313000000 USD20260507Open filing evidence
2025-10-01 – 2025-12-311000000 USD20260206Open filing evidence
2025-04-01 – 2025-06-303200000 USD20260806Open filing evidence
2024-10-01 – 2025-06-308700000 USD20260806Open filing evidence
2025-01-01 – 2025-03-312300000 USD20260507Open filing evidence
2024-10-01 – 2025-03-315500000 USD20260507Open filing evidence
2024-10-01 – 2024-12-313200000 USD20260206Open filing evidence
2023-10-01 – 2024-09-308000000 USD20241216Open filing evidence
2024-04-01 – 2024-06-302800000 USD20250811Open filing evidence
2023-10-01 – 2024-06-306600000 USD20250811Open filing evidence
2024-01-01 – 2024-03-31700000 USD20250508Open filing evidence
2023-10-01 – 2024-03-313800000 USD20250508Open filing evidence
2023-10-01 – 2023-12-313100000 USD20250210Open filing evidence
2022-10-01 – 2023-09-309700000 USD20241216Open filing evidence
2023-04-01 – 2023-06-302800000 USD20241030Open filing evidence
2022-10-01 – 2023-06-307100000 USD20241030Open filing evidence
2023-01-01 – 2023-03-311400000 USD20241030Open filing evidence
2022-10-01 – 2023-03-314300000 USD20241030Open filing evidence
2022-10-01 – 2022-12-312900000 USD20240208Open filing evidence
2021-10-01 – 2022-09-306400000 USD20241216Open filing evidence
2022-01-01 – 2022-03-31700000 USD20230509Open filing evidence
2021-10-01 – 2022-03-313100000 USD20230509Open filing evidence
2021-10-01 – 2021-12-312400000 USD20230207Open filing evidence
2021-01-01 – 2021-09-304500000 USD20241029Open filing evidence
2021-04-01 – 2021-06-302500000 USD20210813Open filing evidence
2021-01-01 – 2021-06-303000000 USD20210813Open filing evidence
2020-10-01 – 2020-12-312400000 USD20220208Open filing evidence

Intersegment Elimination · Plant Nutrition North America

Consolidation Items · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:IntersegmentEliminationMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionNorthAmericaMember
PeriodValueUnitFiledEvidence
2020-01-01 – 2020-12-315400000 USD20210226Open filing evidence

Intersegment Elimination · Plant Nutrition Segment

Consolidation Items · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:IntersegmentEliminationMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionSegmentMember
PeriodValueUnitFiledEvidence
2024-10-01 – 2025-09-3012500000 USD20251212Open filing evidence
2023-10-01 – 2024-09-308000000 USD20251212Open filing evidence
2022-10-01 – 2023-09-309700000 USD20251212Open filing evidence

Intersegment Elimination · Salt

Consolidation Items · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:IntersegmentEliminationMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-300 USD20260806Open filing evidence
2025-10-01 – 2026-06-300 USD20260806Open filing evidence
2026-01-01 – 2026-03-310 USD20260507Open filing evidence
2025-10-01 – 2026-03-310 USD20260507Open filing evidence
2025-10-01 – 2025-12-310 USD20260206Open filing evidence
2025-04-01 – 2025-06-300 USD20260806Open filing evidence
2024-10-01 – 2025-06-300 USD20260806Open filing evidence
2025-01-01 – 2025-03-310 USD20260507Open filing evidence
2024-10-01 – 2025-03-310 USD20260507Open filing evidence
2024-10-01 – 2024-12-310 USD20260206Open filing evidence
2023-10-01 – 2024-09-300 USD20241216Open filing evidence
2024-04-01 – 2024-06-300 USD20250811Open filing evidence
2023-10-01 – 2024-06-300 USD20250811Open filing evidence
2024-01-01 – 2024-03-310 USD20250508Open filing evidence
2023-10-01 – 2024-03-310 USD20250508Open filing evidence
2023-10-01 – 2023-12-310 USD20250210Open filing evidence
2022-10-01 – 2023-09-300 USD20241216Open filing evidence
2023-04-01 – 2023-06-300 USD20241030Open filing evidence
2022-10-01 – 2023-06-300 USD20241030Open filing evidence
2023-01-01 – 2023-03-310 USD20241030Open filing evidence
2022-10-01 – 2023-03-310 USD20241030Open filing evidence
2022-10-01 – 2022-12-310 USD20240208Open filing evidence
2021-10-01 – 2022-09-300 USD20241216Open filing evidence
2022-04-01 – 2022-06-300 USD20230808Open filing evidence
2021-10-01 – 2022-06-300 USD20230808Open filing evidence
2022-01-01 – 2022-03-310 USD20230509Open filing evidence
2021-10-01 – 2022-03-310 USD20230509Open filing evidence
2021-10-01 – 2021-12-310 USD20230207Open filing evidence
2021-01-01 – 2021-09-300 USD20241029Open filing evidence
2021-01-01 – 2021-03-310 USD20210903Open filing evidence
2020-01-01 – 2020-12-310 USD20210903Open filing evidence

Intersegment Elimination · Salt Segment

Consolidation Items · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:IntersegmentEliminationMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltSegmentMember
PeriodValueUnitFiledEvidence
2024-10-01 – 2025-09-300 USD20251212Open filing evidence
2023-10-01 – 2024-09-300 USD20251212Open filing evidence
2022-10-01 – 2023-09-300 USD20251212Open filing evidence

Operating Segments · Consumer Industrial Salt · Plant Nutrition

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=cmp:ConsumerIndustrialSaltMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-310 USD20260507Open filing evidence
2025-10-01 – 2026-03-310 USD20260507Open filing evidence
2025-10-01 – 2025-12-310 USD20260206Open filing evidence
2025-04-01 – 2025-06-300 USD20250811Open filing evidence
2024-10-01 – 2025-06-300 USD20250811Open filing evidence
2025-01-01 – 2025-03-310 USD20260507Open filing evidence
2024-10-01 – 2025-03-310 USD20260507Open filing evidence
2024-10-01 – 2024-12-310 USD20260206Open filing evidence
2023-10-01 – 2024-09-300 USD20241216Open filing evidence
2024-04-01 – 2024-06-300 USD20250811Open filing evidence
2023-10-01 – 2024-06-300 USD20250811Open filing evidence
2024-01-01 – 2024-03-310 USD20250508Open filing evidence
2023-10-01 – 2024-03-310 USD20250508Open filing evidence
2023-10-01 – 2023-12-310 USD20250210Open filing evidence
2022-10-01 – 2023-09-300 USD20241216Open filing evidence
2023-04-01 – 2023-06-300 USD20241030Open filing evidence
2022-10-01 – 2023-06-300 USD20241030Open filing evidence
2021-10-01 – 2022-09-300 USD20241216Open filing evidence
2022-01-01 – 2022-03-310 USD20220510Open filing evidence
2021-10-01 – 2022-03-310 USD20220510Open filing evidence
2021-01-01 – 2021-09-300 USD20231129Open filing evidence
2021-01-01 – 2021-03-310 USD20220510Open filing evidence
2020-10-01 – 2021-03-310 USD20220510Open filing evidence

Operating Segments · Consumer Industrial Salt · Plant Nutrition Segment

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=cmp:ConsumerIndustrialSaltMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionSegmentMember
PeriodValueUnitFiledEvidence
2024-10-01 – 2025-09-300 USD20251212Open filing evidence
2023-10-01 – 2024-09-300 USD20251212Open filing evidence
2022-10-01 – 2023-09-300 USD20251212Open filing evidence

Operating Segments · Consumer Industrial Salt · Salt

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=cmp:ConsumerIndustrialSaltMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-31103700000 USD20260507Open filing evidence
2025-10-01 – 2026-03-31224400000 USD20260507Open filing evidence
2025-10-01 – 2025-12-31120700000 USD20260206Open filing evidence
2025-04-01 – 2025-06-3077200000 USD20250811Open filing evidence
2024-10-01 – 2025-06-30289200000 USD20250811Open filing evidence
2025-01-01 – 2025-03-31107900000 USD20260507Open filing evidence
2024-10-01 – 2025-03-31212000000 USD20260507Open filing evidence
2024-10-01 – 2024-12-31104100000 USD20260206Open filing evidence
2023-10-01 – 2024-09-30361400000 USD20241216Open filing evidence
2024-04-01 – 2024-06-3076500000 USD20250811Open filing evidence
2023-10-01 – 2024-06-30274200000 USD20250811Open filing evidence
2024-01-01 – 2024-03-3182800000 USD20250508Open filing evidence
2023-10-01 – 2024-03-31197700000 USD20250508Open filing evidence
2023-10-01 – 2023-12-31114900000 USD20250210Open filing evidence
2022-10-01 – 2023-09-30369100000 USD20241216Open filing evidence
2023-04-01 – 2023-06-3076500000 USD20241030Open filing evidence
2022-10-01 – 2023-06-30281100000 USD20241030Open filing evidence
2021-10-01 – 2022-09-30370100000 USD20241216Open filing evidence
2022-01-01 – 2022-03-3191200000 USD20220510Open filing evidence
2021-10-01 – 2022-03-31201400000 USD20220510Open filing evidence
2021-01-01 – 2021-09-30230900000 USD20231129Open filing evidence
2021-01-01 – 2021-03-3177700000 USD20220510Open filing evidence
2020-10-01 – 2021-03-31175700000 USD20220510Open filing evidence
2020-01-01 – 2020-12-31305600000 USD20210903Open filing evidence

Operating Segments · Consumer Industrial Salt · Salt Segment

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=cmp:ConsumerIndustrialSaltMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltSegmentMember
PeriodValueUnitFiledEvidence
2024-10-01 – 2025-09-30379800000 USD20251212Open filing evidence
2023-10-01 – 2024-09-30361400000 USD20251212Open filing evidence
2022-10-01 – 2023-09-30369100000 USD20251212Open filing evidence

Operating Segments · Fire Retardant · Plant Nutrition

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=cmp:FireRetardantMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember
PeriodValueUnitFiledEvidence
2023-10-01 – 2024-09-300 USD20241216Open filing evidence
2023-10-01 – 2024-06-300 USD20250811Open filing evidence
2024-01-01 – 2024-03-310 USD20250508Open filing evidence
2023-10-01 – 2024-03-310 USD20250508Open filing evidence
2023-10-01 – 2023-12-310 USD20250210Open filing evidence
2022-10-01 – 2023-09-300 USD20241216Open filing evidence
2023-04-01 – 2023-06-300 USD20241030Open filing evidence
2022-10-01 – 2023-06-300 USD20241030Open filing evidence

Operating Segments · Fire Retardant · Plant Nutrition Segment

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=cmp:FireRetardantMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionSegmentMember
PeriodValueUnitFiledEvidence
2023-10-01 – 2024-09-300 USD20251212Open filing evidence
2022-10-01 – 2023-09-300 USD20251212Open filing evidence

Operating Segments · Fire Retardant · Salt

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=cmp:FireRetardantMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltMember
PeriodValueUnitFiledEvidence
2023-10-01 – 2024-09-300 USD20241216Open filing evidence
2023-10-01 – 2024-06-300 USD20250811Open filing evidence
2024-01-01 – 2024-03-310 USD20250508Open filing evidence
2023-10-01 – 2024-03-310 USD20250508Open filing evidence
2023-10-01 – 2023-12-310 USD20250210Open filing evidence
2022-10-01 – 2023-09-300 USD20241216Open filing evidence
2023-04-01 – 2023-06-300 USD20241030Open filing evidence
2022-10-01 – 2023-06-300 USD20241030Open filing evidence

Operating Segments · Fire Retardant · Salt Segment

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=cmp:FireRetardantMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltSegmentMember
PeriodValueUnitFiledEvidence
2023-10-01 – 2024-09-300 USD20251212Open filing evidence
2022-10-01 – 2023-09-300 USD20251212Open filing evidence

Operating Segments · Highway Deicing Salt · Plant Nutrition

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=cmp:HighwayDeicingSaltMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-310 USD20260507Open filing evidence
2025-10-01 – 2026-03-310 USD20260507Open filing evidence
2025-10-01 – 2025-12-310 USD20260206Open filing evidence
2025-04-01 – 2025-06-300 USD20250811Open filing evidence
2024-10-01 – 2025-06-300 USD20250811Open filing evidence
2025-01-01 – 2025-03-310 USD20260507Open filing evidence
2024-10-01 – 2025-03-310 USD20260507Open filing evidence
2024-10-01 – 2024-12-310 USD20260206Open filing evidence
2023-10-01 – 2024-09-300 USD20241216Open filing evidence
2024-04-01 – 2024-06-300 USD20250811Open filing evidence
2023-10-01 – 2024-06-300 USD20250811Open filing evidence
2024-01-01 – 2024-03-310 USD20250508Open filing evidence
2023-10-01 – 2024-03-310 USD20250508Open filing evidence
2023-10-01 – 2023-12-310 USD20250210Open filing evidence
2022-10-01 – 2023-09-300 USD20241216Open filing evidence
2023-04-01 – 2023-06-300 USD20241030Open filing evidence
2022-10-01 – 2023-06-300 USD20241030Open filing evidence
2021-10-01 – 2022-09-300 USD20241216Open filing evidence
2021-01-01 – 2021-09-300 USD20231129Open filing evidence

Operating Segments · Highway Deicing Salt · Plant Nutrition Segment

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=cmp:HighwayDeicingSaltMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionSegmentMember
PeriodValueUnitFiledEvidence
2024-10-01 – 2025-09-300 USD20251212Open filing evidence
2023-10-01 – 2024-09-300 USD20251212Open filing evidence
2022-10-01 – 2023-09-300 USD20251212Open filing evidence

Operating Segments · Highway Deicing Salt · Salt

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=cmp:HighwayDeicingSaltMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-31278900000 USD20260507Open filing evidence
2025-10-01 – 2026-03-31489700000 USD20260507Open filing evidence
2025-10-01 – 2025-12-31210800000 USD20260206Open filing evidence
2025-04-01 – 2025-06-3088800000 USD20250811Open filing evidence
2024-10-01 – 2025-06-30551700000 USD20250811Open filing evidence
2025-01-01 – 2025-03-31324800000 USD20260507Open filing evidence
2024-10-01 – 2025-03-31462900000 USD20260507Open filing evidence
2024-10-01 – 2024-12-31138100000 USD20260206Open filing evidence
2023-10-01 – 2024-09-30546400000 USD20241216Open filing evidence
2024-04-01 – 2024-06-3084100000 USD20250811Open filing evidence
2023-10-01 – 2024-06-30471100000 USD20250811Open filing evidence
2024-01-01 – 2024-03-31227600000 USD20250508Open filing evidence
2023-10-01 – 2024-03-31387000000 USD20250508Open filing evidence
2023-10-01 – 2023-12-31159400000 USD20250210Open filing evidence
2022-10-01 – 2023-09-30641700000 USD20241216Open filing evidence
2023-04-01 – 2023-06-3079000000 USD20241030Open filing evidence
2022-10-01 – 2023-06-30543000000 USD20241030Open filing evidence
2022-10-01 – 2022-12-31190300000 USD20240208Open filing evidence
2021-10-01 – 2022-09-30641300000 RestatedUSD20241216Open filing evidence
2022-04-01 – 2022-06-3078500000 USD20230808Open filing evidence
2021-10-01 – 2022-06-30542300000 USD20230808Open filing evidence
2021-01-01 – 2021-09-30440200000 USD20231129Open filing evidence

Operating Segments · Highway Deicing Salt · Salt Segment

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=cmp:HighwayDeicingSaltMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltSegmentMember
PeriodValueUnitFiledEvidence
2024-10-01 – 2025-09-30642700000 USD20251212Open filing evidence
2023-10-01 – 2024-09-30546400000 USD20251212Open filing evidence
2022-10-01 – 2023-09-30641700000 USD20251212Open filing evidence

Operating Segments · Industrial Chemicals · Plant Nutrition North America

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=cmp:IndustrialChemicalsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionNorthAmericaMember
PeriodValueUnitFiledEvidence
2020-01-01 – 2020-12-310 USD20210226Open filing evidence

Operating Segments · Revenue From Services · Plant Nutrition

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=cmp:RevenueFromServicesMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember
PeriodValueUnitFiledEvidence
2023-10-01 – 2024-06-300 USD20250811Open filing evidence
2023-10-01 – 2024-03-310 USD20250508Open filing evidence
2023-10-01 – 2023-12-310 USD20250210Open filing evidence

Operating Segments · Revenue From Services · Plant Nutrition Segment

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=cmp:RevenueFromServicesMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionSegmentMember
PeriodValueUnitFiledEvidence
2023-10-01 – 2024-09-300 USD20251212Open filing evidence
2022-10-01 – 2023-09-300 USD20251212Open filing evidence

Operating Segments · Revenue From Services · Salt

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=cmp:RevenueFromServicesMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltMember
PeriodValueUnitFiledEvidence
2023-10-01 – 2024-06-300 USD20250811Open filing evidence
2023-10-01 – 2024-03-310 USD20250508Open filing evidence
2023-10-01 – 2023-12-310 USD20250210Open filing evidence

Operating Segments · Revenue From Services · Salt Segment

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=cmp:RevenueFromServicesMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltSegmentMember
PeriodValueUnitFiledEvidence
2023-10-01 – 2024-09-300 USD20251212Open filing evidence
2022-10-01 – 2023-09-300 USD20251212Open filing evidence

Operating Segments · SOP · Plant Nutrition

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=cmp:SOPMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-3169000000 USD20260507Open filing evidence
2025-10-01 – 2026-03-31130800000 USD20260507Open filing evidence
2025-10-01 – 2025-12-3161800000 USD20260206Open filing evidence
2025-04-01 – 2025-06-3048000000 USD20250811Open filing evidence
2024-10-01 – 2025-06-30173200000 USD20250811Open filing evidence
2025-01-01 – 2025-03-3160600000 USD20260507Open filing evidence
2024-10-01 – 2025-03-31125200000 USD20260507Open filing evidence
2024-10-01 – 2024-12-3164600000 USD20260206Open filing evidence
2023-10-01 – 2024-09-30189000000 USD20241216Open filing evidence
2024-04-01 – 2024-06-3041600000 USD20250811Open filing evidence
2023-10-01 – 2024-06-30145200000 USD20250811Open filing evidence
2024-01-01 – 2024-03-3150800000 USD20250508Open filing evidence
2023-10-01 – 2024-03-31103600000 USD20250508Open filing evidence
2023-10-01 – 2023-12-3152800000 USD20250210Open filing evidence
2022-10-01 – 2023-09-30181800000 USD20241216Open filing evidence
2023-04-01 – 2023-06-3050300000 USD20241030Open filing evidence
2022-10-01 – 2023-06-30143900000 USD20241030Open filing evidence
2021-10-01 – 2022-09-30228700000 USD20241216Open filing evidence
2021-01-01 – 2021-03-3154200000 USD20210903Open filing evidence

Operating Segments · SOP · Plant Nutrition Segment

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=cmp:SOPMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionSegmentMember
PeriodValueUnitFiledEvidence
2024-10-01 – 2025-09-30218800000 USD20251212Open filing evidence
2023-10-01 – 2024-09-30189000000 USD20251212Open filing evidence
2022-10-01 – 2023-09-30181800000 USD20251212Open filing evidence

Operating Segments · SOP · Salt

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=cmp:SOPMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-310 USD20260507Open filing evidence
2025-10-01 – 2026-03-310 USD20260507Open filing evidence
2025-10-01 – 2025-12-310 USD20260206Open filing evidence
2025-04-01 – 2025-06-300 USD20250811Open filing evidence
2024-10-01 – 2025-06-300 USD20250811Open filing evidence
2025-01-01 – 2025-03-310 USD20260507Open filing evidence
2024-10-01 – 2025-03-310 USD20260507Open filing evidence
2024-10-01 – 2024-12-310 USD20260206Open filing evidence
2023-10-01 – 2024-09-300 USD20241216Open filing evidence
2024-04-01 – 2024-06-300 USD20250811Open filing evidence
2023-10-01 – 2024-06-300 USD20250811Open filing evidence
2024-01-01 – 2024-03-310 USD20250508Open filing evidence
2023-10-01 – 2024-03-310 USD20250508Open filing evidence
2023-10-01 – 2023-12-310 USD20250210Open filing evidence
2022-10-01 – 2023-09-300 USD20241216Open filing evidence
2023-04-01 – 2023-06-300 USD20241030Open filing evidence
2022-10-01 – 2023-06-300 USD20241030Open filing evidence
2022-10-01 – 2022-12-310 USD20240208Open filing evidence
2021-10-01 – 2022-09-300 USD20241216Open filing evidence
2022-04-01 – 2022-06-300 USD20230808Open filing evidence
2021-10-01 – 2022-06-300 USD20230808Open filing evidence
2021-01-01 – 2021-03-310 USD20210903Open filing evidence

Operating Segments · SOP · Salt Segment

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=cmp:SOPMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltSegmentMember
PeriodValueUnitFiledEvidence
2024-10-01 – 2025-09-300 USD20251212Open filing evidence
2023-10-01 – 2024-09-300 USD20251212Open filing evidence
2022-10-01 – 2023-09-300 USD20251212Open filing evidence

Operating Segments · Product And Service Other · Plant Nutrition

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:ProductAndServiceOtherMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-31-2000000 USD20260507Open filing evidence
2025-10-01 – 2026-03-31-3000000 USD20260507Open filing evidence
2025-10-01 – 2025-12-31-1000000 USD20260206Open filing evidence
2025-04-01 – 2025-06-30-3200000 USD20250811Open filing evidence
2024-10-01 – 2025-06-30-8700000 USD20250811Open filing evidence
2025-01-01 – 2025-03-31-2300000 USD20260507Open filing evidence
2024-10-01 – 2025-03-31-5500000 USD20260507Open filing evidence
2024-10-01 – 2024-12-31-3200000 USD20260206Open filing evidence
2023-10-01 – 2024-09-30-8000000 USD20241216Open filing evidence
2024-04-01 – 2024-06-30-2800000 USD20250811Open filing evidence
2023-10-01 – 2024-06-30-6600000 USD20250811Open filing evidence
2024-01-01 – 2024-03-31-700000 USD20250508Open filing evidence
2023-10-01 – 2024-03-31-3800000 USD20250508Open filing evidence
2023-10-01 – 2023-12-31-3100000 USD20250210Open filing evidence
2022-10-01 – 2023-09-30-9700000 USD20241216Open filing evidence
2023-04-01 – 2023-06-30-2800000 USD20241030Open filing evidence
2022-10-01 – 2023-06-30-7100000 USD20241030Open filing evidence
2021-10-01 – 2022-09-30-6400000 USD20241216Open filing evidence
2022-01-01 – 2022-03-31-700000 USD20220510Open filing evidence
2021-10-01 – 2022-03-31-3100000 USD20220510Open filing evidence
2021-01-01 – 2021-09-30-4500000 USD20231129Open filing evidence
2021-01-01 – 2021-03-31-500000 USD20220510Open filing evidence
2020-10-01 – 2021-03-31-2900000 USD20220510Open filing evidence

Operating Segments · Product And Service Other · Plant Nutrition North America

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:ProductAndServiceOtherMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionNorthAmericaMember
PeriodValueUnitFiledEvidence
2020-01-01 – 2020-12-31-5400000 USD20210226Open filing evidence

Operating Segments · Product And Service Other · Plant Nutrition Segment

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:ProductAndServiceOtherMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionSegmentMember
PeriodValueUnitFiledEvidence
2024-10-01 – 2025-09-30-12500000 USD20251212Open filing evidence
2023-10-01 – 2024-09-30-8000000 USD20251212Open filing evidence
2022-10-01 – 2023-09-30-9700000 USD20251212Open filing evidence

Operating Segments · Product And Service Other · Salt

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:ProductAndServiceOtherMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltMember
PeriodValueUnitFiledEvidence
2026-01-01 – 2026-03-310 USD20260507Open filing evidence
2025-10-01 – 2026-03-310 USD20260507Open filing evidence
2025-10-01 – 2025-12-310 USD20260206Open filing evidence
2025-04-01 – 2025-06-300 USD20250811Open filing evidence
2024-10-01 – 2025-06-300 USD20250811Open filing evidence
2025-01-01 – 2025-03-310 USD20260507Open filing evidence
2024-10-01 – 2025-03-310 USD20260507Open filing evidence
2024-10-01 – 2024-12-310 USD20260206Open filing evidence
2023-10-01 – 2024-09-300 USD20241216Open filing evidence
2024-04-01 – 2024-06-300 USD20250811Open filing evidence
2023-10-01 – 2024-06-300 USD20250811Open filing evidence
2024-01-01 – 2024-03-310 USD20250508Open filing evidence
2023-10-01 – 2024-03-310 USD20250508Open filing evidence
2023-10-01 – 2023-12-310 USD20250210Open filing evidence
2022-10-01 – 2023-09-300 USD20241216Open filing evidence
2023-04-01 – 2023-06-300 USD20241030Open filing evidence
2022-10-01 – 2023-06-300 USD20241030Open filing evidence
2022-10-01 – 2022-12-310 USD20240208Open filing evidence
2021-10-01 – 2022-09-300 USD20241216Open filing evidence
2022-04-01 – 2022-06-300 USD20230808Open filing evidence
2021-10-01 – 2022-06-300 USD20230808Open filing evidence
2022-01-01 – 2022-03-310 USD20220510Open filing evidence
2021-10-01 – 2022-03-310 USD20220510Open filing evidence
2021-10-01 – 2021-12-310 USD20230207Open filing evidence
2021-01-01 – 2021-09-300 USD20231129Open filing evidence
2021-01-01 – 2021-03-310 USD20220510Open filing evidence
2020-10-01 – 2021-03-310 USD20220510Open filing evidence

Operating Segments · Product And Service Other · Salt Segment

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:ProductAndServiceOtherMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltSegmentMember
PeriodValueUnitFiledEvidence
2024-10-01 – 2025-09-300 USD20251212Open filing evidence
2023-10-01 – 2024-09-300 USD20251212Open filing evidence
2022-10-01 – 2023-09-300 USD20251212Open filing evidence

Operating Segments · Service · Plant Nutrition

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:ServiceMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember
PeriodValueUnitFiledEvidence
2023-10-01 – 2024-09-300 USD20241216Open filing evidence
2022-10-01 – 2023-09-300 USD20241216Open filing evidence

Operating Segments · Service · Salt

Consolidation Items · Product Or Service · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:ServiceMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltMember
PeriodValueUnitFiledEvidence
2023-10-01 – 2024-09-300 USD20241216Open filing evidence
2022-10-01 – 2023-09-300 USD20241216Open filing evidence

Operating Segments · Plant Nutrition

Consolidation Items · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-3037600000 USD20260806Open filing evidence
2025-10-01 – 2026-06-30165400000 USD20260806Open filing evidence
2026-01-01 – 2026-03-3167000000 USD20260507Open filing evidence
2025-10-01 – 2026-03-31127800000 USD20260507Open filing evidence
2025-10-01 – 2025-12-3160800000 USD20260206Open filing evidence
2025-04-01 – 2025-06-3044800000 USD20260806Open filing evidence
2024-10-01 – 2025-06-30164500000 USD20260806Open filing evidence
2025-01-01 – 2025-03-3158300000 USD20260507Open filing evidence
2024-10-01 – 2025-03-31119700000 USD20260507Open filing evidence
2024-10-01 – 2024-12-3161400000 USD20260206Open filing evidence
2023-10-01 – 2024-09-30181000000 USD20241216Open filing evidence
2024-04-01 – 2024-06-3038800000 USD20250811Open filing evidence
2023-10-01 – 2024-06-30138600000 USD20250811Open filing evidence
2024-01-01 – 2024-03-3150100000 USD20250508Open filing evidence
2023-10-01 – 2024-03-3199800000 USD20250508Open filing evidence
2023-10-01 – 2023-12-3149700000 USD20250210Open filing evidence
2022-10-01 – 2023-09-30172100000 USD20241216Open filing evidence
2023-04-01 – 2023-06-3047500000 USD20241030Open filing evidence
2022-10-01 – 2023-06-30136800000 USD20241030Open filing evidence
2023-01-01 – 2023-03-3147700000 USD20241030Open filing evidence
2022-10-01 – 2023-03-3189300000 USD20241030Open filing evidence
2022-10-01 – 2022-12-3141600000 USD20240208Open filing evidence
2021-10-01 – 2022-09-30222300000 USD20241216Open filing evidence
2022-01-01 – 2022-03-3154300000 USD20230509Open filing evidence
2021-10-01 – 2022-03-31108900000 USD20230509Open filing evidence
2021-10-01 – 2021-12-3154600000 USD20220208Open filing evidence
2021-01-01 – 2021-09-30156800000 USD20241029Open filing evidence
2021-01-01 – 2021-03-3153700000 RestatedUSD20220510Open filing evidence
2020-10-01 – 2021-03-31131900000 USD20220510Open filing evidence
2020-10-01 – 2020-12-3178200000 USD20220208Open filing evidence

Operating Segments · Plant Nutrition · Consumer Industrial Salt

Consolidation Items · Statement Business Segments · Product Or Service

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember;srt:ProductOrServiceAxis=cmp:ConsumerIndustrialSaltMember
PeriodValueUnitFiledEvidence
2023-10-01 – 2023-12-310 USD20240208Open filing evidence
2022-10-01 – 2022-12-310 USD20240208Open filing evidence
2021-10-01 – 2021-12-310 USD20220208Open filing evidence
2021-01-01 – 2021-03-310 USD20210507Open filing evidence
2020-10-01 – 2020-12-310 USD20220208Open filing evidence

Operating Segments · Plant Nutrition · Fire Retardant

Consolidation Items · Statement Business Segments · Product Or Service

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember;srt:ProductOrServiceAxis=cmp:FireRetardantMember
PeriodValueUnitFiledEvidence
2022-10-01 – 2023-09-300 USD20231129Open filing evidence

Operating Segments · Plant Nutrition · Highway Deicing Salt

Consolidation Items · Statement Business Segments · Product Or Service

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember;srt:ProductOrServiceAxis=cmp:HighwayDeicingSaltMember
PeriodValueUnitFiledEvidence
2023-10-01 – 2023-12-310 USD20240208Open filing evidence
2022-10-01 – 2022-12-310 USD20240208Open filing evidence
2021-10-01 – 2021-12-310 USD20220208Open filing evidence
2020-10-01 – 2020-12-310 USD20220208Open filing evidence

Operating Segments · Plant Nutrition · SOP

Consolidation Items · Statement Business Segments · Product Or Service

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember;srt:ProductOrServiceAxis=cmp:SOPMember
PeriodValueUnitFiledEvidence
2023-10-01 – 2023-12-3152800000 USD20240208Open filing evidence
2022-10-01 – 2023-09-30181800000 USD20231129Open filing evidence
2022-10-01 – 2022-12-3144500000 USD20240208Open filing evidence
2021-10-01 – 2022-09-30228700000 USD20231129Open filing evidence
2022-01-01 – 2022-03-3155000000 USD20220510Open filing evidence
2021-10-01 – 2022-03-31112000000 USD20220510Open filing evidence
2021-01-01 – 2021-09-30161300000 USD20231129Open filing evidence
2021-01-01 – 2021-03-3154200000 USD20220510Open filing evidence
2020-10-01 – 2021-03-31134800000 USD20220510Open filing evidence

Operating Segments · Plant Nutrition · Product And Service Other

Consolidation Items · Statement Business Segments · Product Or Service

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember;srt:ProductOrServiceAxis=us-gaap:ProductAndServiceOtherMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-31-700000 USD20240515Open filing evidence
2023-10-01 – 2024-03-31-3800000 USD20240515Open filing evidence
2023-10-01 – 2023-12-31-3100000 USD20240208Open filing evidence
2023-01-01 – 2023-03-31-1400000 USD20240515Open filing evidence
2022-10-01 – 2023-03-31-4300000 USD20240515Open filing evidence
2022-10-01 – 2022-12-31-2900000 USD20240208Open filing evidence
2021-10-01 – 2021-12-31-2400000 USD20220208Open filing evidence
2021-01-01 – 2021-03-31-500000 USD20210903Open filing evidence
2020-10-01 – 2020-12-31-2400000 USD20220208Open filing evidence

Operating Segments · Plant Nutrition · Service

Consolidation Items · Statement Business Segments · Product Or Service

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember;srt:ProductOrServiceAxis=us-gaap:ServiceMember
PeriodValueUnitFiledEvidence
2022-10-01 – 2023-09-300 USD20231129Open filing evidence

Operating Segments · Plant Nutrition North America

Consolidation Items · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionNorthAmericaMember
PeriodValueUnitFiledEvidence
2021-10-01 – 2022-09-30222300000 USD20221214Open filing evidence
2021-01-01 – 2021-09-30156800000 USD20221214Open filing evidence
2020-01-01 – 2020-12-31215400000 RestatedUSD20221214Open filing evidence

Operating Segments · Plant Nutrition North America · Consumer Industrial Salt

Consolidation Items · Statement Business Segments · Product Or Service

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionNorthAmericaMember;srt:ProductOrServiceAxis=cmp:ConsumerIndustrialSaltMember
PeriodValueUnitFiledEvidence
2021-10-01 – 2022-09-300 USD20221214Open filing evidence
2021-01-01 – 2021-09-300 USD20221214Open filing evidence
2020-01-01 – 2020-12-310 USD20221214Open filing evidence

Operating Segments · Plant Nutrition North America · Highway Deicing Salt

Consolidation Items · Statement Business Segments · Product Or Service

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionNorthAmericaMember;srt:ProductOrServiceAxis=cmp:HighwayDeicingSaltMember
PeriodValueUnitFiledEvidence
2021-10-01 – 2022-09-300 USD20221214Open filing evidence
2021-01-01 – 2021-09-300 USD20221214Open filing evidence
2020-01-01 – 2020-12-310 USD20221214Open filing evidence

Operating Segments · Plant Nutrition North America · SO Pand Specialty Plant Nutrients

Consolidation Items · Statement Business Segments · Product Or Service

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionNorthAmericaMember;srt:ProductOrServiceAxis=cmp:SOPandSpecialtyPlantNutrientsMember
PeriodValueUnitFiledEvidence
2021-10-01 – 2022-09-30228700000 USD20221214Open filing evidence
2021-01-01 – 2021-09-30161300000 USD20221214Open filing evidence
2020-01-01 – 2020-12-31220800000 RestatedUSD20221214Open filing evidence

Operating Segments · Plant Nutrition Segment

Consolidation Items · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionSegmentMember
PeriodValueUnitFiledEvidence
2024-10-01 – 2025-09-30206300000 USD20251212Open filing evidence
2023-10-01 – 2024-09-30181000000 USD20251212Open filing evidence
2022-10-01 – 2023-09-30172100000 USD20251212Open filing evidence

Operating Segments · Salt

Consolidation Items · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-30173900000 USD20260806Open filing evidence
2025-10-01 – 2026-06-30888000000 USD20260806Open filing evidence
2026-01-01 – 2026-03-31382600000 USD20260507Open filing evidence
2025-10-01 – 2026-03-31714100000 USD20260507Open filing evidence
2025-10-01 – 2025-12-31331500000 USD20260206Open filing evidence
2025-04-01 – 2025-06-30166000000 USD20260806Open filing evidence
2024-10-01 – 2025-06-30840900000 USD20260806Open filing evidence
2025-01-01 – 2025-03-31432700000 USD20260507Open filing evidence
2024-10-01 – 2025-03-31674900000 USD20260507Open filing evidence
2024-10-01 – 2024-12-31242200000 USD20260206Open filing evidence
2023-10-01 – 2024-09-30907800000 USD20241216Open filing evidence
2024-04-01 – 2024-06-30160600000 USD20250811Open filing evidence
2023-10-01 – 2024-06-30745300000 USD20250811Open filing evidence
2024-01-01 – 2024-03-31310400000 USD20250508Open filing evidence
2023-10-01 – 2024-03-31584700000 USD20250508Open filing evidence
2023-10-01 – 2023-12-31274300000 USD20250210Open filing evidence
2022-10-01 – 2023-09-301010800000 USD20241216Open filing evidence
2023-04-01 – 2023-06-30155500000 USD20241030Open filing evidence
2022-10-01 – 2023-06-30824100000 USD20241030Open filing evidence
2023-01-01 – 2023-03-31360500000 USD20241030Open filing evidence
2022-10-01 – 2023-03-31668600000 USD20241030Open filing evidence
2022-10-01 – 2022-12-31308100000 USD20240208Open filing evidence
2021-10-01 – 2022-09-301011400000 RestatedUSD20241216Open filing evidence
2022-04-01 – 2022-06-30156200000 USD20230808Open filing evidence
2021-10-01 – 2022-06-30821400000 USD20230808Open filing evidence
2022-01-01 – 2022-03-31391300000 USD20220510Open filing evidence
2021-10-01 – 2022-03-31665200000 USD20220510Open filing evidence
2021-10-01 – 2021-12-31273900000 USD20230207Open filing evidence
2021-01-01 – 2021-09-30670700000 RestatedUSD20241029Open filing evidence
2021-01-01 – 2021-03-31369000000 USD20220510Open filing evidence
2020-10-01 – 2021-03-31597500000 USD20220510Open filing evidence
2020-01-01 – 2020-12-31779400000 USD20221214Open filing evidence

Operating Segments · Salt · Consumer Industrial Salt

Consolidation Items · Statement Business Segments · Product Or Service

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltMember;srt:ProductOrServiceAxis=cmp:ConsumerIndustrialSaltMember
PeriodValueUnitFiledEvidence
2023-10-01 – 2023-12-31114900000 USD20240208Open filing evidence
2022-10-01 – 2022-12-31117800000 USD20240208Open filing evidence
2021-10-01 – 2022-09-30370100000 USD20221214Open filing evidence
2021-01-01 – 2021-09-30230900000 USD20221214Open filing evidence
2020-01-01 – 2020-12-31305600000 USD20221214Open filing evidence

Operating Segments · Salt · Fire Retardant

Consolidation Items · Statement Business Segments · Product Or Service

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltMember;srt:ProductOrServiceAxis=cmp:FireRetardantMember
PeriodValueUnitFiledEvidence
2022-10-01 – 2023-09-300 USD20231129Open filing evidence

Operating Segments · Salt · Highway Deicing Salt

Consolidation Items · Statement Business Segments · Product Or Service

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltMember;srt:ProductOrServiceAxis=cmp:HighwayDeicingSaltMember
PeriodValueUnitFiledEvidence
2022-10-01 – 2022-12-31190300000 USD20230207Open filing evidence
2021-10-01 – 2022-09-30640200000 USD20221214Open filing evidence
2021-10-01 – 2021-12-31163700000 USD20230207Open filing evidence
2021-01-01 – 2021-09-30440200000 USD20221214Open filing evidence
2020-01-01 – 2020-12-31473800000 USD20221214Open filing evidence

Operating Segments · Salt · SO Pand Specialty Plant Nutrients

Consolidation Items · Statement Business Segments · Product Or Service

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltMember;srt:ProductOrServiceAxis=cmp:SOPandSpecialtyPlantNutrientsMember
PeriodValueUnitFiledEvidence
2021-10-01 – 2022-09-300 USD20221214Open filing evidence
2021-01-01 – 2021-09-300 USD20221214Open filing evidence
2020-01-01 – 2020-12-310 USD20221214Open filing evidence

Operating Segments · Salt · SOP

Consolidation Items · Statement Business Segments · Product Or Service

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltMember;srt:ProductOrServiceAxis=cmp:SOPMember
PeriodValueUnitFiledEvidence
2022-10-01 – 2023-09-300 USD20231129Open filing evidence
2022-10-01 – 2022-12-310 USD20230207Open filing evidence
2021-10-01 – 2022-09-300 USD20231129Open filing evidence
2022-01-01 – 2022-03-310 USD20220510Open filing evidence
2021-10-01 – 2022-03-310 USD20220510Open filing evidence
2021-10-01 – 2021-12-310 USD20230207Open filing evidence
2021-01-01 – 2021-09-300 USD20231129Open filing evidence
2021-01-01 – 2021-03-310 USD20220510Open filing evidence
2020-10-01 – 2021-03-310 USD20220510Open filing evidence

Operating Segments · Salt · Service

Consolidation Items · Statement Business Segments · Product Or Service

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltMember;srt:ProductOrServiceAxis=us-gaap:ServiceMember
PeriodValueUnitFiledEvidence
2022-10-01 – 2023-09-300 USD20231129Open filing evidence

Operating Segments · Salt Segment

Consolidation Items · Statement Business Segments

Source dimensions srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltSegmentMember
PeriodValueUnitFiledEvidence
2024-10-01 – 2025-09-301022500000 USD20251212Open filing evidence
2023-10-01 – 2024-09-30907800000 USD20251212Open filing evidence
2022-10-01 – 2023-09-301010800000 USD20251212Open filing evidence

Consumer Industrial Salt · Operating Segments · Plant Nutrition

Product Or Service · Consolidation Items · Statement Business Segments

Source dimensions srt:ProductOrServiceAxis=cmp:ConsumerIndustrialSaltMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-310 USD20241030Open filing evidence
2023-10-01 – 2024-03-310 USD20241030Open filing evidence
2022-10-01 – 2023-09-300 USD20241029Open filing evidence
2023-01-01 – 2023-03-310 USD20241030Open filing evidence
2022-10-01 – 2023-03-310 USD20241030Open filing evidence
2021-10-01 – 2022-09-300 USD20241029Open filing evidence
2022-01-01 – 2022-03-310 USD20230509Open filing evidence
2021-10-01 – 2022-03-310 USD20230509Open filing evidence
2021-01-01 – 2021-09-300 USD20241029Open filing evidence
2021-01-01 – 2021-03-310 USD20210903Open filing evidence

Consumer Industrial Salt · Operating Segments · Salt

Product Or Service · Consolidation Items · Statement Business Segments

Source dimensions srt:ProductOrServiceAxis=cmp:ConsumerIndustrialSaltMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-3182800000 USD20241030Open filing evidence
2023-10-01 – 2024-03-31197700000 USD20241030Open filing evidence
2022-10-01 – 2023-09-30369100000 USD20241029Open filing evidence
2023-04-01 – 2023-06-3076500000 USD20230808Open filing evidence
2022-10-01 – 2023-06-30281100000 USD20230808Open filing evidence
2023-01-01 – 2023-03-3186800000 USD20241030Open filing evidence
2022-10-01 – 2023-03-31204600000 USD20241030Open filing evidence
2022-10-01 – 2022-12-31117800000 USD20230207Open filing evidence
2021-10-01 – 2022-09-30370100000 USD20241029Open filing evidence
2022-04-01 – 2022-06-3077700000 USD20230808Open filing evidence
2021-10-01 – 2022-06-30279100000 USD20230808Open filing evidence
2021-10-01 – 2021-12-31110200000 USD20230207Open filing evidence
2021-01-01 – 2021-09-30230900000 USD20241029Open filing evidence
2021-01-01 – 2021-03-3177700000 USD20210903Open filing evidence

Consumer Industrial Salt · Plant Nutrition · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=cmp:ConsumerIndustrialSaltMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-300 USD20260806Open filing evidence
2025-10-01 – 2026-06-300 USD20260806Open filing evidence
2025-04-01 – 2025-06-300 USD20260806Open filing evidence
2024-10-01 – 2025-06-300 USD20260806Open filing evidence
2022-10-01 – 2022-12-310 USD20230207Open filing evidence
2021-10-01 – 2021-12-310 USD20230207Open filing evidence

Consumer Industrial Salt · Salt · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=cmp:ConsumerIndustrialSaltMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-3084000000 USD20260806Open filing evidence
2025-10-01 – 2026-06-30308400000 USD20260806Open filing evidence
2025-04-01 – 2025-06-3077200000 USD20260806Open filing evidence
2024-10-01 – 2025-06-30289200000 USD20260806Open filing evidence

Fire Retardant · Operating Segments · Plant Nutrition

Product Or Service · Consolidation Items · Statement Business Segments

Source dimensions srt:ProductOrServiceAxis=cmp:FireRetardantMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-310 USD20241030Open filing evidence
2023-10-01 – 2024-03-310 USD20241030Open filing evidence
2023-10-01 – 2023-12-310 USD20240208Open filing evidence
2022-10-01 – 2023-09-300 USD20241029Open filing evidence

Fire Retardant · Operating Segments · Salt

Product Or Service · Consolidation Items · Statement Business Segments

Source dimensions srt:ProductOrServiceAxis=cmp:FireRetardantMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-310 USD20241030Open filing evidence
2023-10-01 – 2024-03-310 USD20241030Open filing evidence
2023-10-01 – 2023-12-310 USD20240208Open filing evidence
2022-10-01 – 2023-09-300 USD20241029Open filing evidence
2023-04-01 – 2023-06-300 USD20230808Open filing evidence
2022-10-01 – 2023-06-300 USD20230808Open filing evidence

Highway Deicing Salt · Operating Segments · Plant Nutrition

Product Or Service · Consolidation Items · Statement Business Segments

Source dimensions srt:ProductOrServiceAxis=cmp:HighwayDeicingSaltMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-310 USD20241030Open filing evidence
2023-10-01 – 2024-03-310 USD20241030Open filing evidence
2022-10-01 – 2023-09-300 USD20241029Open filing evidence
2023-01-01 – 2023-03-310 USD20241030Open filing evidence
2022-10-01 – 2023-03-310 USD20241030Open filing evidence
2021-10-01 – 2022-09-300 USD20241029Open filing evidence
2022-01-01 – 2022-03-310 USD20230509Open filing evidence
2021-10-01 – 2022-03-310 USD20230509Open filing evidence
2021-01-01 – 2021-09-300 USD20241029Open filing evidence
2021-01-01 – 2021-03-310 USD20220510Open filing evidence
2020-10-01 – 2021-03-310 USD20220510Open filing evidence

Highway Deicing Salt · Operating Segments · Plant Nutrition North America

Product Or Service · Consolidation Items · Statement Business Segments

Source dimensions srt:ProductOrServiceAxis=cmp:HighwayDeicingSaltMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionNorthAmericaMember
PeriodValueUnitFiledEvidence
2020-01-01 – 2020-12-310 USD20210226Open filing evidence

Highway Deicing Salt · Operating Segments · Salt

Product Or Service · Consolidation Items · Statement Business Segments

Source dimensions srt:ProductOrServiceAxis=cmp:HighwayDeicingSaltMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-31227600000 USD20241030Open filing evidence
2023-10-01 – 2024-03-31387000000 USD20241030Open filing evidence
2022-10-01 – 2023-09-30641700000 USD20241029Open filing evidence
2023-01-01 – 2023-03-31273700000 USD20241030Open filing evidence
2022-10-01 – 2023-03-31464000000 USD20241030Open filing evidence
2021-10-01 – 2022-09-30641300000 USD20241029Open filing evidence
2022-01-01 – 2022-03-31300100000 USD20220510Open filing evidence
2021-10-01 – 2022-03-31463800000 USD20220510Open filing evidence
2021-01-01 – 2021-09-30439800000 USD20241029Open filing evidence
2021-01-01 – 2021-03-31291300000 USD20220510Open filing evidence
2020-10-01 – 2021-03-31421800000 USD20220510Open filing evidence
2020-01-01 – 2020-12-31473800000 USD20210903Open filing evidence

Highway Deicing Salt · Plant Nutrition · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=cmp:HighwayDeicingSaltMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2022-04-01 – 2022-06-300 USD20220805Open filing evidence
2021-10-01 – 2022-06-300 USD20220805Open filing evidence
2021-04-01 – 2021-06-300 USD20220805Open filing evidence
2021-01-01 – 2021-06-300 USD20210813Open filing evidence
2020-10-01 – 2021-06-300 USD20220805Open filing evidence

Highway Deicing Salt · Plant Nutrition North America · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=cmp:HighwayDeicingSaltMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionNorthAmericaMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2020-01-01 – 2020-12-310 USD20210903Open filing evidence

Highway Deicing Salt · Salt · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=cmp:HighwayDeicingSaltMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-31227600000 USD20240515Open filing evidence
2023-10-01 – 2024-03-31387000000 USD20240515Open filing evidence
2023-01-01 – 2023-03-31273700000 USD20240515Open filing evidence
2022-10-01 – 2023-03-31464000000 USD20240515Open filing evidence
2022-04-01 – 2022-06-3078500000 USD20220805Open filing evidence
2021-10-01 – 2022-06-30542300000 USD20220805Open filing evidence
2021-04-01 – 2021-06-3071900000 USD20220805Open filing evidence
2021-01-01 – 2021-06-30363200000 USD20210813Open filing evidence
2020-10-01 – 2021-06-30493700000 USD20220805Open filing evidence
2021-01-01 – 2021-03-31291300000 USD20210507Open filing evidence

Highway Salt · Plant Nutrition · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=cmp:HighwaySaltMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-300 USD20260806Open filing evidence
2025-10-01 – 2026-06-300 USD20260806Open filing evidence
2025-04-01 – 2025-06-300 USD20260806Open filing evidence
2024-10-01 – 2025-06-300 USD20260806Open filing evidence

Highway Salt · Salt · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=cmp:HighwaySaltMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-3089900000 USD20260806Open filing evidence
2025-10-01 – 2026-06-30579600000 USD20260806Open filing evidence
2025-04-01 – 2025-06-3088800000 USD20260806Open filing evidence
2024-10-01 – 2025-06-30551700000 USD20260806Open filing evidence

Revenue From Services · Operating Segments · Plant Nutrition

Product Or Service · Consolidation Items · Statement Business Segments

Source dimensions srt:ProductOrServiceAxis=cmp:RevenueFromServicesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember
PeriodValueUnitFiledEvidence
2023-10-01 – 2024-03-310 USD20241030Open filing evidence
2023-10-01 – 2023-12-310 USD20240208Open filing evidence

Revenue From Services · Operating Segments · Salt

Product Or Service · Consolidation Items · Statement Business Segments

Source dimensions srt:ProductOrServiceAxis=cmp:RevenueFromServicesMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltMember
PeriodValueUnitFiledEvidence
2023-10-01 – 2024-03-310 USD20241030Open filing evidence
2023-10-01 – 2023-12-310 USD20240208Open filing evidence

Revenue From Services · Salt · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=cmp:RevenueFromServicesMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2023-10-01 – 2024-03-310 USD20240515Open filing evidence

SO Pand Specialty Plant Nutrients · Operating Segments · Salt

Product Or Service · Consolidation Items · Statement Business Segments

Source dimensions srt:ProductOrServiceAxis=cmp:SOPandSpecialtyPlantNutrientsMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltMember
PeriodValueUnitFiledEvidence
2020-01-01 – 2020-12-310 USD20210903Open filing evidence

SOP · Operating Segments · Plant Nutrition

Product Or Service · Consolidation Items · Statement Business Segments

Source dimensions srt:ProductOrServiceAxis=cmp:SOPMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-3150800000 USD20241030Open filing evidence
2023-10-01 – 2024-03-31103600000 USD20241030Open filing evidence
2022-10-01 – 2023-09-30181800000 USD20241029Open filing evidence
2023-01-01 – 2023-03-3149100000 USD20241030Open filing evidence
2022-10-01 – 2023-03-3193600000 USD20241030Open filing evidence
2021-10-01 – 2022-09-30228700000 USD20241029Open filing evidence
2022-01-01 – 2022-03-3155000000 USD20230509Open filing evidence
2021-10-01 – 2022-03-31112000000 USD20230509Open filing evidence
2021-10-01 – 2021-12-3157000000 USD20220208Open filing evidence
2021-01-01 – 2021-09-30161300000 USD20241029Open filing evidence
2021-01-01 – 2021-03-3154700000 USD20210507Open filing evidence
2020-10-01 – 2020-12-3180600000 USD20220208Open filing evidence

SOP · Operating Segments · Salt

Product Or Service · Consolidation Items · Statement Business Segments

Source dimensions srt:ProductOrServiceAxis=cmp:SOPMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-310 USD20241030Open filing evidence
2023-10-01 – 2024-03-310 USD20241030Open filing evidence
2022-10-01 – 2023-09-300 USD20241029Open filing evidence
2023-01-01 – 2023-03-310 USD20241030Open filing evidence
2022-10-01 – 2023-03-310 USD20241030Open filing evidence
2021-10-01 – 2022-09-300 USD20241029Open filing evidence
2021-01-01 – 2021-09-300 USD20241029Open filing evidence

SOP · Plant Nutrition · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=cmp:SOPMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-3041000000 USD20260806Open filing evidence
2025-10-01 – 2026-06-30171800000 USD20260806Open filing evidence
2025-04-01 – 2025-06-3048000000 USD20260806Open filing evidence
2024-10-01 – 2025-06-30173200000 USD20260806Open filing evidence
2022-04-01 – 2022-06-3057500000 USD20220805Open filing evidence
2021-10-01 – 2022-06-30169500000 USD20220805Open filing evidence
2021-04-01 – 2021-06-3056300000 USD20220805Open filing evidence
2021-01-01 – 2021-06-30110500000 USD20210813Open filing evidence
2020-10-01 – 2021-06-30191100000 USD20220805Open filing evidence

SOP · Salt · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=cmp:SOPMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-300 USD20260806Open filing evidence
2025-10-01 – 2026-06-300 USD20260806Open filing evidence
2025-04-01 – 2025-06-300 USD20260806Open filing evidence
2024-10-01 – 2025-06-300 USD20260806Open filing evidence
2024-01-01 – 2024-03-310 USD20240515Open filing evidence
2023-10-01 – 2024-03-310 USD20240515Open filing evidence
2023-01-01 – 2023-03-310 USD20240515Open filing evidence
2022-10-01 – 2023-03-310 USD20240515Open filing evidence
2022-04-01 – 2022-06-300 USD20220805Open filing evidence
2021-10-01 – 2022-06-300 USD20220805Open filing evidence
2021-04-01 – 2021-06-300 USD20220805Open filing evidence
2021-01-01 – 2021-06-300 USD20210813Open filing evidence
2020-10-01 – 2021-06-300 USD20220805Open filing evidence
2021-01-01 – 2021-03-310 USD20210507Open filing evidence

Product And Service Other · Operating Segments · Plant Nutrition

Product Or Service · Consolidation Items · Statement Business Segments

Source dimensions srt:ProductOrServiceAxis=us-gaap:ProductAndServiceOtherMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-31-700000 USD20241030Open filing evidence
2023-10-01 – 2024-03-31-3800000 USD20241030Open filing evidence
2022-10-01 – 2023-09-30-9700000 USD20241029Open filing evidence
2023-01-01 – 2023-03-31-1400000 USD20241030Open filing evidence
2022-10-01 – 2023-03-31-4300000 USD20241030Open filing evidence
2021-10-01 – 2022-09-30-6400000 USD20241029Open filing evidence
2022-01-01 – 2022-03-31-700000 USD20230509Open filing evidence
2021-10-01 – 2022-03-31-3100000 USD20230509Open filing evidence
2021-01-01 – 2021-09-30-4500000 USD20241029Open filing evidence

Product And Service Other · Operating Segments · Plant Nutrition North America

Product Or Service · Consolidation Items · Statement Business Segments

Source dimensions srt:ProductOrServiceAxis=us-gaap:ProductAndServiceOtherMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionNorthAmericaMember
PeriodValueUnitFiledEvidence
2021-10-01 – 2022-09-30-6400000 USD20221214Open filing evidence
2021-01-01 – 2021-09-30-4500000 USD20221214Open filing evidence
2020-01-01 – 2020-12-31-5400000 USD20221214Open filing evidence

Product And Service Other · Operating Segments · Salt

Product Or Service · Consolidation Items · Statement Business Segments

Source dimensions srt:ProductOrServiceAxis=us-gaap:ProductAndServiceOtherMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-310 USD20241030Open filing evidence
2023-10-01 – 2024-03-310 USD20241030Open filing evidence
2022-10-01 – 2023-09-300 USD20241029Open filing evidence
2023-01-01 – 2023-03-310 USD20241030Open filing evidence
2022-10-01 – 2023-03-310 USD20241030Open filing evidence
2021-10-01 – 2022-09-300 USD20241029Open filing evidence
2021-01-01 – 2021-09-300 USD20241029Open filing evidence
2020-01-01 – 2020-12-310 USD20221214Open filing evidence

Product And Service Other · Plant Nutrition · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=us-gaap:ProductAndServiceOtherMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-30-3400000 USD20260806Open filing evidence
2025-10-01 – 2026-06-30-6400000 USD20260806Open filing evidence
2025-04-01 – 2025-06-30-3200000 USD20260806Open filing evidence
2024-10-01 – 2025-06-30-8700000 USD20260806Open filing evidence

Product And Service Other · Salt · Operating Segments

Product Or Service · Statement Business Segments · Consolidation Items

Source dimensions srt:ProductOrServiceAxis=us-gaap:ProductAndServiceOtherMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2026-04-01 – 2026-06-300 USD20260806Open filing evidence
2025-10-01 – 2026-06-300 USD20260806Open filing evidence
2025-04-01 – 2025-06-300 USD20260806Open filing evidence
2024-10-01 – 2025-06-300 USD20260806Open filing evidence
2023-01-01 – 2023-03-310 USD20230509Open filing evidence
2022-10-01 – 2023-03-310 USD20230509Open filing evidence
2022-01-01 – 2022-03-310 USD20230509Open filing evidence
2021-10-01 – 2022-03-310 USD20230509Open filing evidence

Service · Operating Segments · Plant Nutrition

Product Or Service · Consolidation Items · Statement Business Segments

Source dimensions srt:ProductOrServiceAxis=us-gaap:ServiceMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember
PeriodValueUnitFiledEvidence
2022-10-01 – 2023-09-300 USD20241029Open filing evidence

Service · Operating Segments · Salt

Product Or Service · Consolidation Items · Statement Business Segments

Source dimensions srt:ProductOrServiceAxis=us-gaap:ServiceMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;us-gaap:StatementBusinessSegmentsAxis=cmp:SaltMember
PeriodValueUnitFiledEvidence
2022-10-01 – 2023-09-300 USD20241029Open filing evidence

Plant Nutrition · Intersegment Elimination

Statement Business Segments · Consolidation Items

Source dimensions us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember;srt:ConsolidationItemsAxis=us-gaap:IntersegmentEliminationMember
PeriodValueUnitFiledEvidence
2022-10-01 – 2023-09-309700000 USD20231129Open filing evidence
2023-04-01 – 2023-06-302800000 USD20230808Open filing evidence
2022-10-01 – 2023-06-307100000 USD20230808Open filing evidence
2021-10-01 – 2022-09-306400000 USD20231129Open filing evidence
2022-04-01 – 2022-06-301900000 USD20230808Open filing evidence
2021-10-01 – 2022-06-305000000 USD20230808Open filing evidence
2022-01-01 – 2022-03-31700000 USD20220510Open filing evidence
2021-10-01 – 2022-03-313100000 USD20220510Open filing evidence
2021-01-01 – 2021-09-304500000 USD20231129Open filing evidence
2021-04-01 – 2021-06-302500000 USD20220805Open filing evidence
2020-10-01 – 2021-06-305400000 USD20220805Open filing evidence
2021-01-01 – 2021-03-31500000 USD20220510Open filing evidence
2020-10-01 – 2021-03-312900000 USD20220510Open filing evidence

Plant Nutrition · Operating Segments

Statement Business Segments · Consolidation Items

Source dimensions us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2023-04-01 – 2023-06-3047500000 USD20230808Open filing evidence
2022-10-01 – 2023-06-30136800000 USD20230808Open filing evidence
2022-10-01 – 2022-12-3141600000 USD20230207Open filing evidence
2022-04-01 – 2022-06-3055600000 USD20230808Open filing evidence
2021-10-01 – 2022-06-30164500000 USD20230808Open filing evidence
2021-10-01 – 2021-12-3154600000 USD20230207Open filing evidence
2021-04-01 – 2021-06-3053800000 USD20220805Open filing evidence
2021-01-01 – 2021-06-30107500000 USD20210813Open filing evidence
2020-10-01 – 2021-06-30185700000 USD20220805Open filing evidence

Plant Nutrition · Operating Segments · Consumer Industrial Salt

Statement Business Segments · Consolidation Items · Product Or Service

Source dimensions us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=cmp:ConsumerIndustrialSaltMember
PeriodValueUnitFiledEvidence
2022-04-01 – 2022-06-300 USD20220805Open filing evidence
2021-10-01 – 2022-06-300 USD20220805Open filing evidence
2021-04-01 – 2021-06-300 USD20220805Open filing evidence
2020-10-01 – 2021-06-300 USD20220805Open filing evidence

Plant Nutrition · Operating Segments · Highway Deicing Salt

Statement Business Segments · Consolidation Items · Product Or Service

Source dimensions us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=cmp:HighwayDeicingSaltMember
PeriodValueUnitFiledEvidence
2023-04-01 – 2023-06-300 USD20230808Open filing evidence
2022-10-01 – 2023-06-300 USD20230808Open filing evidence
2022-10-01 – 2022-12-310 USD20230207Open filing evidence
2022-04-01 – 2022-06-300 USD20230808Open filing evidence
2021-10-01 – 2022-06-300 USD20230808Open filing evidence
2021-10-01 – 2021-12-310 USD20230207Open filing evidence

Plant Nutrition · Operating Segments · SOP

Statement Business Segments · Consolidation Items · Product Or Service

Source dimensions us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=cmp:SOPMember
PeriodValueUnitFiledEvidence
2023-04-01 – 2023-06-3050300000 USD20230808Open filing evidence
2022-10-01 – 2023-06-30143900000 USD20230808Open filing evidence
2022-10-01 – 2022-12-3144500000 USD20230207Open filing evidence
2022-04-01 – 2022-06-3057500000 USD20230808Open filing evidence
2021-10-01 – 2022-06-30169500000 USD20230808Open filing evidence
2021-10-01 – 2021-12-3157000000 USD20230207Open filing evidence

Plant Nutrition · Operating Segments · Product And Service Other

Statement Business Segments · Consolidation Items · Product Or Service

Source dimensions us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:ProductAndServiceOtherMember
PeriodValueUnitFiledEvidence
2023-04-01 – 2023-06-30-2800000 USD20230808Open filing evidence
2022-10-01 – 2023-06-30-7100000 USD20230808Open filing evidence
2022-10-01 – 2022-12-31-2900000 USD20230207Open filing evidence
2022-04-01 – 2022-06-30-1900000 USD20230808Open filing evidence
2021-10-01 – 2022-06-30-5000000 USD20230808Open filing evidence
2021-10-01 – 2021-12-31-2400000 USD20230207Open filing evidence
2021-04-01 – 2021-06-30-2500000 USD20220805Open filing evidence
2020-10-01 – 2021-06-30-5400000 USD20220805Open filing evidence

Plant Nutrition · Consumer Industrial Salt · Operating Segments

Statement Business Segments · Product Or Service · Consolidation Items

Source dimensions us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember;srt:ProductOrServiceAxis=cmp:ConsumerIndustrialSaltMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2023-04-01 – 2023-06-300 USD20230808Open filing evidence
2022-10-01 – 2023-06-300 USD20230808Open filing evidence
2022-04-01 – 2022-06-300 USD20230808Open filing evidence
2021-10-01 – 2022-06-300 USD20230808Open filing evidence
2021-04-01 – 2021-06-300 USD20210813Open filing evidence
2021-01-01 – 2021-06-300 USD20210813Open filing evidence

Plant Nutrition · Fire Retardant · Operating Segments

Statement Business Segments · Product Or Service · Consolidation Items

Source dimensions us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember;srt:ProductOrServiceAxis=cmp:FireRetardantMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2023-04-01 – 2023-06-300 USD20230808Open filing evidence
2022-10-01 – 2023-06-300 USD20230808Open filing evidence

Plant Nutrition · Product And Service Other · Operating Segments

Statement Business Segments · Product Or Service · Consolidation Items

Source dimensions us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionMember;srt:ProductOrServiceAxis=us-gaap:ProductAndServiceOtherMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2021-04-01 – 2021-06-30-2500000 USD20210813Open filing evidence
2021-01-01 – 2021-06-30-3000000 USD20210813Open filing evidence

Plant Nutrition North America · Intersegment Elimination

Statement Business Segments · Consolidation Items

Source dimensions us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionNorthAmericaMember;srt:ConsolidationItemsAxis=us-gaap:IntersegmentEliminationMember
PeriodValueUnitFiledEvidence
2021-10-01 – 2022-09-306400000 USD20221214Open filing evidence
2021-01-01 – 2021-09-304500000 USD20221214Open filing evidence
2020-01-01 – 2020-12-315400000 USD20221214Open filing evidence

Plant Nutrition North America · Operating Segments

Statement Business Segments · Consolidation Items

Source dimensions us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionNorthAmericaMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2020-01-01 – 2020-12-31215400000 USD20210903Open filing evidence

Plant Nutrition North America · Operating Segments · Consumer Industrial Salt

Statement Business Segments · Consolidation Items · Product Or Service

Source dimensions us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionNorthAmericaMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=cmp:ConsumerIndustrialSaltMember
PeriodValueUnitFiledEvidence
2020-01-01 – 2020-12-310 USD20210903Open filing evidence

Plant Nutrition North America · SO Pand Specialty Plant Nutrients · Operating Segments

Statement Business Segments · Product Or Service · Consolidation Items

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PeriodValueUnitFiledEvidence
2020-01-01 – 2020-12-31220800000 USD20210903Open filing evidence

Plant Nutrition North America · Product And Service Other · Operating Segments

Statement Business Segments · Product Or Service · Consolidation Items

Source dimensions us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionNorthAmericaMember;srt:ProductOrServiceAxis=us-gaap:ProductAndServiceOtherMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2020-01-01 – 2020-12-31-5400000 USD20210903Open filing evidence

Plant Nutrition South America · Intersegment Elimination

Statement Business Segments · Consolidation Items

Source dimensions us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionSouthAmericaMember;srt:ConsolidationItemsAxis=us-gaap:IntersegmentEliminationMember
PeriodValueUnitFiledEvidence
2020-01-01 – 2020-12-31300000 USD20210226Open filing evidence

Plant Nutrition South America · Operating Segments

Statement Business Segments · Consolidation Items

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PeriodValueUnitFiledEvidence
2020-01-01 – 2020-12-31344400000 USD20210226Open filing evidence

Plant Nutrition South America · Operating Segments · Consumer Industrial Salt

Statement Business Segments · Consolidation Items · Product Or Service

Source dimensions us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionSouthAmericaMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=cmp:ConsumerIndustrialSaltMember
PeriodValueUnitFiledEvidence
2020-01-01 – 2020-12-310 USD20210226Open filing evidence

Plant Nutrition South America · Operating Segments · Industrial Chemicals

Statement Business Segments · Consolidation Items · Product Or Service

Source dimensions us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionSouthAmericaMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=cmp:IndustrialChemicalsMember
PeriodValueUnitFiledEvidence
2020-01-01 – 2020-12-3171900000 USD20210226Open filing evidence

Plant Nutrition South America · Operating Segments · SO Pand Specialty Plant Nutrients

Statement Business Segments · Consolidation Items · Product Or Service

Source dimensions us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionSouthAmericaMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=cmp:SOPandSpecialtyPlantNutrientsMember
PeriodValueUnitFiledEvidence
2020-01-01 – 2020-12-31272800000 USD20210226Open filing evidence

Plant Nutrition South America · Operating Segments · Product And Service Other

Statement Business Segments · Consolidation Items · Product Or Service

Source dimensions us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionSouthAmericaMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:ProductAndServiceOtherMember
PeriodValueUnitFiledEvidence
2020-01-01 – 2020-12-31-300000 USD20210226Open filing evidence

Plant Nutrition South America · Highway Deicing Salt · Operating Segments

Statement Business Segments · Product Or Service · Consolidation Items

Source dimensions us-gaap:StatementBusinessSegmentsAxis=cmp:PlantNutritionSouthAmericaMember;srt:ProductOrServiceAxis=cmp:HighwayDeicingSaltMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2020-01-01 – 2020-12-310 USD20210226Open filing evidence

Salt · Intersegment Elimination

Statement Business Segments · Consolidation Items

Source dimensions us-gaap:StatementBusinessSegmentsAxis=cmp:SaltMember;srt:ConsolidationItemsAxis=us-gaap:IntersegmentEliminationMember
PeriodValueUnitFiledEvidence
2022-10-01 – 2023-09-300 USD20231129Open filing evidence
2021-10-01 – 2022-09-300 USD20231129Open filing evidence
2022-04-01 – 2022-06-300 USD20220805Open filing evidence
2021-10-01 – 2022-06-300 USD20220805Open filing evidence
2022-01-01 – 2022-03-310 USD20220510Open filing evidence
2021-10-01 – 2022-03-310 USD20220510Open filing evidence
2021-10-01 – 2021-12-310 USD20220208Open filing evidence
2021-01-01 – 2021-09-300 USD20231129Open filing evidence
2021-04-01 – 2021-06-300 USD20220805Open filing evidence
2021-01-01 – 2021-06-300 USD20210813Open filing evidence
2020-10-01 – 2021-06-300 USD20220805Open filing evidence
2021-01-01 – 2021-03-310 USD20220510Open filing evidence
2020-10-01 – 2021-03-310 USD20220510Open filing evidence
2020-10-01 – 2020-12-310 USD20220208Open filing evidence
2020-01-01 – 2020-12-310 USD20221214Open filing evidence

Salt · Operating Segments

Statement Business Segments · Consolidation Items

Source dimensions us-gaap:StatementBusinessSegmentsAxis=cmp:SaltMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-31310400000 USD20240515Open filing evidence
2023-10-01 – 2024-03-31584700000 USD20240515Open filing evidence
2023-01-01 – 2023-03-31360500000 USD20240515Open filing evidence
2022-10-01 – 2023-03-31668600000 USD20240515Open filing evidence
2022-04-01 – 2022-06-30156200000 USD20220805Open filing evidence
2021-10-01 – 2022-06-30821400000 USD20220805Open filing evidence
2022-01-01 – 2022-03-31391300000 USD20230509Open filing evidence
2021-10-01 – 2022-03-31665200000 USD20230509Open filing evidence
2021-10-01 – 2021-12-31273900000 USD20220208Open filing evidence
2021-04-01 – 2021-06-30142600000 USD20220805Open filing evidence
2021-01-01 – 2021-06-30511600000 USD20210813Open filing evidence
2020-10-01 – 2021-06-30740100000 USD20220805Open filing evidence
2021-01-01 – 2021-03-31369000000 USD20210507Open filing evidence
2020-10-01 – 2020-12-31228500000 USD20220208Open filing evidence
2020-01-01 – 2020-12-31779400000 USD20210226Open filing evidence

Salt · Operating Segments · Consumer Industrial Salt

Statement Business Segments · Consolidation Items · Product Or Service

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PeriodValueUnitFiledEvidence
2022-04-01 – 2022-06-3077700000 USD20220805Open filing evidence
2021-10-01 – 2022-06-30279100000 USD20220805Open filing evidence
2021-10-01 – 2021-12-31110200000 USD20220208Open filing evidence
2021-04-01 – 2021-06-3070700000 USD20220805Open filing evidence
2020-10-01 – 2021-06-30246400000 USD20220805Open filing evidence
2021-01-01 – 2021-03-3177700000 USD20210507Open filing evidence
2020-10-01 – 2020-12-3198000000 USD20220208Open filing evidence
2020-01-01 – 2020-12-31305600000 USD20210226Open filing evidence

Salt · Operating Segments · Highway Deicing Salt

Statement Business Segments · Consolidation Items · Product Or Service

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PeriodValueUnitFiledEvidence
2021-10-01 – 2021-12-31163700000 USD20220208Open filing evidence
2020-10-01 – 2020-12-31130500000 USD20220208Open filing evidence

Salt · Operating Segments · Industrial Chemicals

Statement Business Segments · Consolidation Items · Product Or Service

Source dimensions us-gaap:StatementBusinessSegmentsAxis=cmp:SaltMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=cmp:IndustrialChemicalsMember
PeriodValueUnitFiledEvidence
2020-01-01 – 2020-12-310 USD20210226Open filing evidence

Salt · Operating Segments · SO Pand Specialty Plant Nutrients

Statement Business Segments · Consolidation Items · Product Or Service

Source dimensions us-gaap:StatementBusinessSegmentsAxis=cmp:SaltMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=cmp:SOPandSpecialtyPlantNutrientsMember
PeriodValueUnitFiledEvidence
2020-01-01 – 2020-12-310 USD20210226Open filing evidence

Salt · Operating Segments · Product And Service Other

Statement Business Segments · Consolidation Items · Product Or Service

Source dimensions us-gaap:StatementBusinessSegmentsAxis=cmp:SaltMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember;srt:ProductOrServiceAxis=us-gaap:ProductAndServiceOtherMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-310 USD20240515Open filing evidence
2023-10-01 – 2024-03-310 USD20240515Open filing evidence
2023-01-01 – 2023-03-310 USD20240515Open filing evidence
2022-10-01 – 2023-03-310 USD20240515Open filing evidence
2022-04-01 – 2022-06-300 USD20220805Open filing evidence
2021-10-01 – 2022-06-300 USD20220805Open filing evidence
2021-10-01 – 2021-12-310 USD20220208Open filing evidence
2021-04-01 – 2021-06-300 USD20220805Open filing evidence
2020-10-01 – 2021-06-300 USD20220805Open filing evidence
2021-01-01 – 2021-03-310 USD20210507Open filing evidence
2020-10-01 – 2020-12-310 USD20220208Open filing evidence
2020-01-01 – 2020-12-310 USD20210226Open filing evidence

Salt · Consumer Industrial Salt · Operating Segments

Statement Business Segments · Product Or Service · Consolidation Items

Source dimensions us-gaap:StatementBusinessSegmentsAxis=cmp:SaltMember;srt:ProductOrServiceAxis=cmp:ConsumerIndustrialSaltMember;srt:ConsolidationItemsAxis=us-gaap:OperatingSegmentsMember
PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-3182800000 USD20240515Open filing evidence
2023-10-01 – 2024-03-31197700000 USD20240515Open filing evidence
2023-01-01 – 2023-03-3186800000 USD20240515Open filing evidence
2022-10-01 – 2023-03-31204600000 USD20240515Open filing evidence
2022-01-01 – 2022-03-3191200000 USD20230509Open filing evidence
2021-10-01 – 2022-03-31201400000 USD20230509Open filing evidence
2021-04-01 – 2021-06-3070700000 USD20210813Open filing evidence
2021-01-01 – 2021-06-30148400000 USD20210813Open filing evidence

Salt · Fire Retardant · Operating Segments

Statement Business Segments · Product Or Service · Consolidation Items

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PeriodValueUnitFiledEvidence
2024-01-01 – 2024-03-310 USD20240515Open filing evidence
2023-10-01 – 2024-03-310 USD20240515Open filing evidence

Salt · Highway Deicing Salt · Operating Segments

Statement Business Segments · Product Or Service · Consolidation Items

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PeriodValueUnitFiledEvidence
2023-01-01 – 2023-03-31273700000 USD20230509Open filing evidence
2022-10-01 – 2023-03-31464000000 USD20230509Open filing evidence
2022-01-01 – 2022-03-31300100000 USD20230509Open filing evidence
2021-10-01 – 2022-03-31463800000 USD20230509Open filing evidence
2020-01-01 – 2020-12-31473800000 USD20210226Open filing evidence

Salt · SOP · Operating Segments

Statement Business Segments · Product Or Service · Consolidation Items

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PeriodValueUnitFiledEvidence
2023-01-01 – 2023-03-310 USD20230509Open filing evidence
2022-10-01 – 2023-03-310 USD20230509Open filing evidence
2022-01-01 – 2022-03-310 USD20230509Open filing evidence
2021-10-01 – 2022-03-310 USD20230509Open filing evidence
2021-10-01 – 2021-12-310 USD20220208Open filing evidence

Salt · Product And Service Other · Operating Segments

Statement Business Segments · Product Or Service · Consolidation Items

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PeriodValueUnitFiledEvidence
2021-04-01 – 2021-06-300 USD20210813Open filing evidence
2021-01-01 – 2021-06-300 USD20210813Open filing evidence