$CMP
COMPASS MINERALS INTERNATIONAL INC Stock $cmp

$cmp Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-K Financial Statement

#000122765421000037 Filed on February 26, 2021

Income Statement

Concept	2020 Q4	2020 Q3	2020
Revenue	$309.2M	$282.4M	$1.374B
YoY Change	-38.2%	-17.26%	-7.85%
Cost Of Revenue	$321.1M	$223.7M	$1.061B
YoY Change	-10.38%	-15.55%	-8.02%
Gross Profit	$58.50M	$58.70M	$312.3M
YoY Change	-58.8%	-23.17%	-7.27%
Gross Profit Margin	18.92%	20.79%	22.74%
Selling, General & Admin	$30.40M	$41.30M	$171.8M
YoY Change	-33.62%	-10.8%	-0.81%
% of Gross Profit	51.97%	70.36%	55.01%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$34.30M	$35.60M	$137.9M
YoY Change	-2.28%	5.01%	0.0%
% of Gross Profit	58.63%	60.65%	44.16%
Operating Expenses	$30.40M	$41.30M	$171.8M
YoY Change	-33.62%	-10.8%	-0.81%
Operating Profit	$28.10M	$17.40M	$140.5M
YoY Change	-70.79%	-42.19%	-14.12%
Interest Expense	$15.50M	$17.10M	$71.20M
YoY Change	-189.08%	-3.39%	4.09%
% of Operating Profit	55.16%	98.28%	50.68%
Other Income/Expense, Net	-$100.0K	$100.0K	$100.0K
YoY Change	-98.31%	-96.15%	-100.88%
Pretax Income	$6.300M	-$3.400M	$71.20M
YoY Change	-91.36%	-122.08%	-15.84%
Income Tax	-$8.400M	-$1.300M	$11.70M
% Of Pretax Income	-133.33%		16.43%
Net Earnings	$28.10M	-$2.100M	$59.50M
YoY Change	-49.91%	-119.81%	-4.8%
Net Earnings / Revenue	9.09%	-0.74%	4.33%
Basic Earnings Per Share	$0.82	-$0.07	$1.72
Diluted Earnings Per Share	$0.81	-$0.07	$1.72
COMMON SHARES
Basic Shares Outstanding	33.96M shares	33.95M shares	33.93M shares
Diluted Shares Outstanding	33.98M shares	33.95M shares	33.93M shares

Balance Sheet

Concept	2020 Q4	2020 Q3	2020
SHORT-TERM ASSETS
Cash & Short-Term Investments	$10.60M	$34.10M	$10.60M
YoY Change	-69.45%	42.68%	-69.45%
Cash & Equivalents	$10.60M	$34.10M	$10.60M
Short-Term Investments
Other Short-Term Assets	$55.40M	$71.60M	$261.6M
YoY Change	-42.53%	-39.53%	171.37%
Inventory	$298.7M	$385.5M	$299.9M
Prepaid Expenses
Receivables	$185.1M	$194.2M	$185.1M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$756.3M	$685.4M	$757.2M
YoY Change	-3.66%	-1.44%	-3.54%
LONG-TERM ASSETS
Property, Plant & Equipment	$851.7M	$1.001B	$851.7M
YoY Change	-17.37%	-2.2%	-21.47%
Goodwill	$55.70M	$260.7M
YoY Change	-83.76%	-21.5%
Intangibles	$49.90M	$83.50M
YoY Change	-51.55%	-19.87%
Long-Term Investments	$20.00M	$24.40M
YoY Change	-19.68%	0.41%
Other Assets	$143.8M	$159.0M	$547.9M
YoY Change	-8.12%	5.79%	432.98%
Total Long-Term Assets	$1.505B	$1.472B	$1.505B
YoY Change	-9.23%	-9.91%	-9.23%
TOTAL ASSETS
Total Short-Term Assets	$756.3M	$685.4M	$757.2M
Total Long-Term Assets	$1.505B	$1.472B	$1.505B
Total Assets	$2.262B	$2.158B	$2.262B
YoY Change	-7.44%	-7.38%	-7.4%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$82.60M	$121.5M	$82.60M
YoY Change	-34.55%	10.15%	-34.55%
Accrued Expenses	$56.40M	$64.10M	$87.10M
YoY Change	-8.29%	-9.59%	-17.28%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$10.00M	$56.40M	$10.00M
YoY Change	-80.81%	10.81%	-81.2%
Total Short-Term Liabilities	$296.7M	$301.8M	$296.3M
YoY Change	0.27%	8.6%	0.14%
LONG-TERM LIABILITIES
Long-Term Debt	$1.299B	$1.289B	$1.299B
YoY Change	-4.75%	-5.08%	-5.18%
Other Long-Term Liabilities	$154.0M	$161.9M	$220.0M
YoY Change	-6.04%	11.58%	39.51%
Total Long-Term Liabilities	$1.453B	$1.451B	$1.519B
YoY Change	-4.89%	-3.47%	-0.57%
TOTAL LIABILITIES
Total Short-Term Liabilities	$296.7M	$301.8M	$296.3M
Total Long-Term Liabilities	$1.453B	$1.451B	$1.519B
Total Liabilities	$1.750B	$1.753B	$1.875B
YoY Change	-4.05%	-1.59%	-2.0%
SHAREHOLDERS EQUITY
Retained Earnings	$559.1M	$560.1M
YoY Change	-7.95%	-2.76%
Common Stock	$127.4M	$124.9M
YoY Change	8.43%	8.42%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$4.400M	$4.400M
YoY Change	37.5%	37.5%
Treasury Stock Shares	1.408M shares	1.412M shares
Shareholders Equity	$378.3M	$319.9M	$387.0M
YoY Change
Total Liabilities & Shareholders Equity	$2.262B	$2.158B	$2.262B
YoY Change	-7.44%	-7.38%	-7.4%

Cashflow Statement

Concept	2020 Q4	2020 Q3	2020
OPERATING ACTIVITIES
Net Income	$28.10M	-$2.100M	$59.50M
YoY Change	-49.91%	-119.81%	-4.8%
Depreciation, Depletion And Amortization	$34.30M	$35.60M	$137.9M
YoY Change	-2.28%	5.01%	0.0%
Cash From Operating Activities	-$13.30M	-$45.40M	$175.2M
YoY Change	-119.5%	121.46%	9.77%
INVESTING ACTIVITIES
Capital Expenditures	-$22.00M	-$20.20M	-$84.90M
YoY Change	-16.98%	-7.34%	-13.46%
Acquisitions
YoY Change
Other Investing Activities	$200.0K	-$1.000M	$3.300M
YoY Change	-128.57%	66.67%	43.48%
Cash From Investing Activities	-$23.00M	-$21.20M	-$88.20M
YoY Change	-15.44%	-5.36%	-12.15%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net	$32.50M	$15.40M	$79.20M
YoY Change			-91.23%
Cash From Financing Activities	$22.10M	33.40M	-$96.20M
YoY Change	-189.47%	-20.85%	90.5%
NET CHANGE
Cash From Operating Activities	-$13.30M	-45.40M	$175.2M
Cash From Investing Activities	-$23.00M	-21.20M	-$88.20M
Cash From Financing Activities	$22.10M	33.40M	-$96.20M
Net Change In Cash	-$13.10M	-33.20M	-$13.70M
YoY Change	-180.37%	4642.86%	-277.92%
FREE CASH FLOW
Cash From Operating Activities	-$13.30M	-$45.40M	$175.2M
Capital Expenditures	-$22.00M	-$20.20M	-$84.90M
Free Cash Flow	$8.700M	-$25.20M	$260.1M
YoY Change	-90.81%	-2038.46%	0.93%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2020	dei	Entity Central Index Key EntityCentralIndexKey	0001227654
CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2020	dei	Amendment Flag AmendmentFlag	false
CY2018	us-gaap	Accounting Standards Update Extensible List AccountingStandardsUpdateExtensibleList	us-gaap:AccountingStandardsUpdate201602Member
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	us-gaap:OtherAssets
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	us-gaap:OtherAssets
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent Statement Of Financial Position Extensible List OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList	us-gaap:OtherLiabilitiesNoncurrent
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent Statement Of Financial Position Extensible List OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList	us-gaap:OtherLiabilitiesNoncurrent
CY2019Q4	us-gaap	Finance Lease Liability Noncurrent Statement Of Financial Position Extensible List FinanceLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList	us-gaap:OtherLiabilitiesNoncurrent
CY2020Q4	us-gaap	Finance Lease Liability Noncurrent Statement Of Financial Position Extensible List FinanceLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList	us-gaap:OtherLiabilitiesNoncurrent
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset Statement Of Financial Position Extensible List FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
CY2020Q4	us-gaap	Operating Lease Liability Current Statement Of Financial Position Extensible List OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	us-gaap:AccruedLiabilitiesCurrent
CY2019Q4	us-gaap	Operating Lease Liability Current Statement Of Financial Position Extensible List OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	us-gaap:AccruedLiabilitiesCurrent
CY2020Q4	us-gaap	Finance Lease Liability Current Statement Of Financial Position Extensible List FinanceLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	us-gaap:AccruedLiabilitiesCurrent
CY2019Q4	us-gaap	Finance Lease Liability Current Statement Of Financial Position Extensible List FinanceLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	us-gaap:AccruedLiabilitiesCurrent
CY2020	dei	Document Type DocumentType	10-K
CY2020	dei	Document Annual Report DocumentAnnualReport	true
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-12-31
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020	dei	Document Transition Report DocumentTransitionReport	false
CY2020	dei	Entity File Number EntityFileNumber	001-31921
CY2020	dei	Entity Registrant Name EntityRegistrantName	Compass Minerals International, Inc.
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	36-3972986
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	9900 West 109th Street, Suite 100
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	66210
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	Overland Park,
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	KS
CY2020	dei	City Area Code CityAreaCode	913
CY2020	dei	Local Phone Number LocalPhoneNumber	344-9200
CY2020	dei	Security12b Title Security12bTitle	Common stock, $0.01 par value
CY2020	dei	Trading Symbol TradingSymbol	CMP
CY2020	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2020	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2020	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2020	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2020	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2020	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2020	dei	Entity Small Business EntitySmallBusiness	false
CY2020	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2020	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2020	dei	Entity Shell Company EntityShellCompany	false
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CY2020Q4	us-gaap	Goodwill Goodwill	281300000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	343000000.0	USD
CY2020Q4	us-gaap	Equity Method Investments EquityMethodInvestments	20000000.0	USD
CY2019Q4	us-gaap	Equity Method Investments EquityMethodInvestments	24900000	USD
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CY2020Q4	us-gaap	Liabilities Current LiabilitiesCurrent	296300000	USD
CY2019Q4	us-gaap	Liabilities Current LiabilitiesCurrent	295900000	USD
CY2020Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1337700000	USD
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1363900000	USD
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CY2018	us-gaap	Gross Profit GrossProfit	293900000	USD
CY2020	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	171800000	USD
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CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	71200000	USD
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CY2020	us-gaap	Net Income Loss NetIncomeLoss	59500000	USD
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CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	600000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	300000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	100000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	200000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	800000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	100000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	400000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-109500000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	21100000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-132600000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-51700000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	81300000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-64000000.0	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	694600000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-64000000.0	USD
CY2018	us-gaap	Tax Cuts And Jobs Act Of2017 Reclassification From Aoci To Retained Earnings Tax Effect TaxCutsAndJobsActOf2017ReclassificationFromAociToRetainedEarningsTaxEffect	0	USD
CY2018	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	2.88
CY2018	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	97700000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	7300000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	540200000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	81300000	USD
CY2019	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	2.88
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	98100000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	6600000	USD
CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-300000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	529600000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-51700000	USD
CY2020	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	2.88
CY2020	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	99100000	USD
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-1100000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	9400000	USD
CY2020	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	-100000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	387000000.0	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	59500000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	62500000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	68800000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	137900000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	137900000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	136900000	USD
CY2020	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	3200000	USD
CY2019	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	2800000	USD
CY2018	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	2200000	USD
CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-100000	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-300000	USD
CY2018	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	9400000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	6300000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	7800000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	5400000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-11800000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-16700000	USD
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	1400000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	700000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	1000000.0	USD
CY2020	us-gaap	Unrealized Gain Loss On Derivatives And Commodity Contracts UnrealizedGainLossOnDerivativesAndCommodityContracts	2800000	USD
CY2019	us-gaap	Unrealized Gain Loss On Derivatives And Commodity Contracts UnrealizedGainLossOnDerivativesAndCommodityContracts	-15000000.0	USD
CY2018	us-gaap	Unrealized Gain Loss On Derivatives And Commodity Contracts UnrealizedGainLossOnDerivativesAndCommodityContracts	-100000	USD
CY2020	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-6800000	USD
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-7200000	USD
CY2018	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-4100000	USD
CY2020	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-19500000	USD
CY2019	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	31300000	USD
CY2018	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-16400000	USD
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	71400000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	45400000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	16800000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-21100000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-23900000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	18400000	USD
CY2020	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	-3700000	USD
CY2019	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	-12100000	USD
CY2018	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	21100000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-8400000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	5000000.0	USD
CY2018	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-22200000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	175200000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	159600000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	182300000	USD
CY2020	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	84900000	USD
CY2019	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	98100000	USD
CY2018	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	96800000	USD
CY2020	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	3300000	USD
CY2019	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	2300000	USD
CY2018	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	2800000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-88200000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-100400000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-99600000	USD
CY2020	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	300000000.0	USD
CY2019	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	574100000	USD
CY2018	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	457400000	USD
CY2020	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	329700000	USD
CY2019	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	611100000	USD
CY2018	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	429100000	USD
CY2020	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	115800000	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1001800000	USD
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	54300000	USD
CY2020	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	79200000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	902800000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	68100000	USD
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	99100000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	98100000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	97700000	USD
CY2020	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	1000000.0	USD
CY2019	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	12800000	USD
CY2018	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	1700000	USD
CY2020	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1100000	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	300000	USD
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	0	USD
CY2020	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-1900000	USD
CY2019	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-1300000	USD
CY2018	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-1000000.0	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-96200000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-50500000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	36600000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-85900000	USD
CY2020	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-4500000	USD
CY2019	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-1000000.0	USD
CY2018	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-6400000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-13700000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	7700000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-9600000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	34700000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	27000000.0	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	21000000.0	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	34700000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	27000000.0	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	65000000.0	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	60700000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	52100000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-10300000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	33900000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	38300000	USD
CY2020	us-gaap	Nature Of Operations NatureOfOperations	ORGANIZATION AND FORMATION<div style="text-align:justify;text-indent:13.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Compass Minerals International, Inc. (“CMI”), through its subsidiaries (collectively, “CMP,” “Compass Minerals” or the “Company”), is a leading producer of essential minerals focused on safely delivering where and when it matters to help solve nature’s challenges for customers and communities. Its salt products help keep roadways safe during winter weather and are used in numerous other consumer, industrial and agricultural applications. Its plant nutrition business manufactures an innovative and diverse portfolio of products that improve the quality and yield of crops, while supporting sustainable agriculture. Additionally, its specialty chemical business serves the water treatment industry and other industrial processes. The Company’s principal products are salt, consisting of sodium chloride and magnesium chloride, sulfate of potash (“SOP”), secondary nutrients and micronutrients; and specialty chemicals. The Company’s production sites are located in the United States (“U.S.”), Canada, Brazil and the United Kingdom (“U.K.”). The Company also provides records management services in the U.K.</span></div><div style="text-align:justify;text-indent:13.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">CMI is a holding company with no operations other than those of its subsidiaries.</span></div>
CY2020	us-gaap	Use Of Estimates UseOfEstimates	Management Estimates:The preparation of consolidated financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”) as included in the Accounting Standards Codification requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates.
CY2020	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	Reclassifications:The Company has made reclassifications of prior year amounts in Consolidated Statements of Operations to conform to current year presentation.
CY2020	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-72600000	USD
CY2019	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-1200000	USD
CY2018	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-56500000	USD
CY2020	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	400000	USD
CY2019	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	-13000000.0	USD
CY2018	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	5800000	USD
CY2020	us-gaap	Accounts Receivable Sale AccountsReceivableSale	22100000	USD
CY2020	us-gaap	Proceeds From Sale And Collection Of Receivables ProceedsFromSaleAndCollectionOfReceivables	21000000.0	USD
CY2020	cmp	Saleof Receivables Contingent Liability Percent SaleofReceivablesContingentLiabilityPercent	0.20
CY2020Q4	cmp	Receivables Due Contingent Consideration ReceivablesDueContingentConsideration	4100000	USD
	us-gaap	Accounts Receivable Sale AccountsReceivableSale	16400000	USD
	us-gaap	Proceeds From Sale And Collection Of Receivables ProceedsFromSaleAndCollectionOfReceivables	15600000	USD
	cmp	Saleof Receivables Contingent Liability Percent SaleofReceivablesContingentLiabilityPercent	0.20
CY2019Q4	cmp	Receivables Due Contingent Consideration ReceivablesDueContingentConsideration	2700000	USD
	us-gaap	Accounts Receivable Sale AccountsReceivableSale	32700000	USD
	us-gaap	Proceeds From Sale And Collection Of Receivables ProceedsFromSaleAndCollectionOfReceivables	30400000	USD
CY2020Q4	us-gaap	Assets Held For Sale Not Part Of Disposal Group Current AssetsHeldForSaleNotPartOfDisposalGroupCurrent	6800000	USD
CY2019Q4	us-gaap	Assets Held For Sale Not Part Of Disposal Group Current AssetsHeldForSaleNotPartOfDisposalGroupCurrent	7200000	USD
CY2020Q4	us-gaap	Capitalized Computer Software Net CapitalizedComputerSoftwareNet	13400000	USD
CY2019Q4	us-gaap	Capitalized Computer Software Net CapitalizedComputerSoftwareNet	16000000.0	USD
CY2020	cmp	Period Of Amortization Of Capitalized Computer Software Costs PeriodOfAmortizationOfCapitalizedComputerSoftwareCosts	P5Y
CY2020	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	5800000	USD
CY2019	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	6600000	USD
CY2018	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	7300000	USD
CY2020Q4	us-gaap	Inventory Noncurrent InventoryNoncurrent	27900000	USD
CY2019Q4	us-gaap	Inventory Noncurrent InventoryNoncurrent	31000000.0	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	55600000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	53700000	USD
CY2020Q4	cmp	Investments In Marketable Securities Relating To Deferred Compensation Arrangement InvestmentsInMarketableSecuritiesRelatingToDeferredCompensationArrangement	1900000	USD
CY2019Q4	cmp	Investments In Marketable Securities Relating To Deferred Compensation Arrangement InvestmentsInMarketableSecuritiesRelatingToDeferredCompensationArrangement	1400000	USD
CY2020	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	Concentration of Credit Risk:The Company sells its salt and magnesium chloride products to various governmental agencies, manufacturers, distributors and retailers primarily in the Midwestern U.S. and throughout Canada and the U.K. The Company’s plant nutrition products are sold across the Western Hemisphere and globally. No single customer or group of affiliated customers accounted for more than 10% of the Company’s sales in any year during the three-year period ended December 31, 2020, or more than 10% of receivables at December 31, 2020 or 2019.
CY2020	cmp	Revenue Performance Obligation Payment Terms Period RevenuePerformanceObligationPaymentTermsPeriod	P30D
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	55600000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	53700000	USD
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	7200000	USD
CY2019Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	5800000	USD
CY2020Q4	cmp	Lease Rightof Use Asset LeaseRightofUseAsset	62800000	USD
CY2019Q4	cmp	Lease Rightof Use Asset LeaseRightofUseAsset	59500000	USD
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	14800000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	12800000	USD
CY2020Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	1300000	USD
CY2019Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	1100000	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	42800000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	41000000.0	USD
CY2020Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	7000000.0	USD
CY2019Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	6200000	USD
CY2020Q4	cmp	Lease Liability LeaseLiability	65900000	USD
CY2019Q4	cmp	Lease Liability LeaseLiability	61100000	USD
CY2020	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	1800000	USD
CY2019	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	1100000	USD
CY2020	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	600000	USD
CY2019	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	600000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	17400000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	19200000	USD
CY2020	us-gaap	Variable Lease Cost VariableLeaseCost	11700000	USD
CY2019	us-gaap	Variable Lease Cost VariableLeaseCost	18800000	USD
CY2020	us-gaap	Lease Cost LeaseCost	31500000	USD
CY2019	us-gaap	Lease Cost LeaseCost	39700000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	16400000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	1800000	USD
CY2020Q4	cmp	Operating And Finance Lease Liability Payments Due Next Twelve Months OperatingAndFinanceLeaseLiabilityPaymentsDueNextTwelveMonths	18200000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	13100000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	1200000	USD
CY2020Q4	cmp	Operating And Finance Lease Liability Payments Due Year Two OperatingAndFinanceLeaseLiabilityPaymentsDueYearTwo	14300000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	8400000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	1100000	USD
CY2020Q4	cmp	Operating And Finance Lease Liability Payments Due Year Three OperatingAndFinanceLeaseLiabilityPaymentsDueYearThree	9500000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	5700000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	900000	USD
CY2020Q4	cmp	Operating And Finance Lease Liability Payments Due Year Four OperatingAndFinanceLeaseLiabilityPaymentsDueYearFour	6600000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	4900000	USD
CY2020Q4	cmp	Operating And Finance Lease Liability Payments Dueafter Year Five OperatingAndFinanceLeaseLiabilityPaymentsDueafterYearFive	24100000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	900000	USD
CY2020Q4	cmp	Operating And Finance Lease Liability Payments Due Year Five OperatingAndFinanceLeaseLiabilityPaymentsDueYearFive	5800000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	18000000.0	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	6100000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	66500000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	12000000.0	USD
CY2020Q4	cmp	Operating And Finance Lease Liability Payments Due OperatingAndFinanceLeaseLiabilityPaymentsDue	78500000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	8900000	USD
CY2020Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	3700000	USD
CY2020Q4	cmp	Operating And Finance Lease Liability Undiscounted Excess Amount OperatingAndFinanceLeaseLiabilityUndiscountedExcessAmount	12600000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	57600000	USD
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	8300000	USD
CY2020Q4	cmp	Operating And Finance Lease Liability OperatingAndFinanceLeaseLiability	65900000	USD
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y8M12D
CY2020Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P9Y3M18D
CY2019Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P7Y2M12D
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.037
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.043
CY2020Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.073
CY2019Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.076
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	15300000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	18900000	USD
CY2020	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	600000	USD
CY2019	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	600000	USD
CY2020	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	1800000	USD
CY2019	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	1300000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	16500000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	20300000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	3800000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	200000	USD
CY2020Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	287400000	USD
CY2019Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	235300000	USD
CY2020Q4	us-gaap	Inventory Raw Materials And Supplies Net Of Reserves InventoryRawMaterialsAndSuppliesNetOfReserves	83200000	USD
CY2019Q4	us-gaap	Inventory Raw Materials And Supplies Net Of Reserves InventoryRawMaterialsAndSuppliesNetOfReserves	76200000	USD
CY2020Q4	us-gaap	Inventory Net InventoryNet	370600000	USD
CY2019Q4	us-gaap	Inventory Net InventoryNet	311500000	USD
CY2020Q3	us-gaap	Inventory Write Down InventoryWriteDown	7400000	USD
CY2020Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Before Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization	1996300000	USD
CY2019Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Before Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization	1971000000.0	USD
CY2020Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	1031400000	USD
CY2019Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	940200000	USD
CY2020Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	964900000	USD
CY2019Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	1030800000	USD
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	11200000	USD
CY2019Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	9200000	USD
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset Accumulated Amortization FinanceLeaseRightOfUseAssetAccumulatedAmortization	4000000.0	USD
CY2019Q4	us-gaap	Finance Lease Right Of Use Asset Accumulated Amortization FinanceLeaseRightOfUseAssetAccumulatedAmortization	3400000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	140200000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	73500000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	66700000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	153500000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	68800000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	84700000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	10700000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	13600000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	15000000.0	USD
CY2020	cmp	Finite Lived Intangible Assets Projected Amortization Expense Minimum FiniteLivedIntangibleAssetsProjectedAmortizationExpenseMinimum	5000000	USD
CY2020	cmp	Finite Lived Intangible Assets Projected Amortization Expense Maximum FiniteLivedIntangibleAssetsProjectedAmortizationExpenseMaximum	10000000	USD
CY2020	us-gaap	Finite Lived Intangible Assets Remaining Amortization Period1 FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1	P5Y
CY2020	us-gaap	Acquired Finite Lived Intangible Assets Weighted Average Useful Life AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife	P20Y
CY2020Q4	us-gaap	Goodwill Goodwill	281300000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	343000000.0	USD
CY2017	cmp	Tax Cuts And Jobs Act Incomplete Accounting Reasonable Provisional Income Tax Expense Benefit TaxCutsAndJobsActIncompleteAccountingReasonableProvisionalIncomeTaxExpenseBenefit	46800000	USD
CY2017	cmp	Tax Cuts And Jobs Act Incomplete Accounting One Time Transition Tax For Accumulated Foreign Earnings Provisional Income Tax Expense TaxCutsAndJobsActIncompleteAccountingOneTimeTransitionTaxForAccumulatedForeignEarningsProvisionalIncomeTaxExpense	55200000	USD
CY2017	cmp	Tax Cuts And Jobs Act Incomplete Accounting Change In Tax Rate Remeasurement Of Deferred Tax Liability Provisional Income Tax Benefit TaxCutsAndJobsActIncompleteAccountingChangeInTaxRateRemeasurementOfDeferredTaxLiabilityProvisionalIncomeTaxBenefit	8400000	USD
CY2018	us-gaap	Tax Cuts And Jobs Act Of2017 Change In Tax Rate Deferred Tax Liability Income Tax Benefit TaxCutsAndJobsActOf2017ChangeInTaxRateDeferredTaxLiabilityIncomeTaxBenefit	3000000.0	USD
CY2018	cmp	Tax Cutsand Jobs Actof2017 Transition Taxfor Accumulated Foreign Earnings Income Tax Expense Benefit TaxCutsandJobsActof2017TransitionTaxforAccumulatedForeignEarningsIncomeTaxExpenseBenefit	-3100000	USD
CY2018	cmp	Tax Cuts And Jobs Act Incomplete Accounting Change In Tax Rate Remeasurement Of Deferred Tax Liability Provisional Income Tax Benefit TaxCutsAndJobsActIncompleteAccountingChangeInTaxRateRemeasurementOfDeferredTaxLiabilityProvisionalIncomeTaxBenefit	100000	USD
CY2018	us-gaap	Foreign Earnings Repatriated ForeignEarningsRepatriated	150000000	USD
CY2019	us-gaap	Income Tax Reconciliation Repatriation Of Foreign Earnings IncomeTaxReconciliationRepatriationOfForeignEarnings	900000	USD
CY2018	us-gaap	Income Tax Reconciliation Repatriation Of Foreign Earnings IncomeTaxReconciliationRepatriationOfForeignEarnings	3400000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-22300000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	5300000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	8100000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	400000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2000000.0	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	4300000	USD
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	28200000	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	26600000	USD
CY2018	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	13100000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	6300000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	33900000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	25500000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	1200000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-7200000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-8600000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-1200000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-1900000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-500000	USD
CY2020	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	5400000	USD
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-2700000	USD
CY2018	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-7600000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	5400000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-11800000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-16700000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11700000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	22100000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8800000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-4100000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	31700000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-80600000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	75300000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	52900000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	158200000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	71200000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	84600000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	77600000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	15000000.0	USD
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	17800000	USD
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	16300000	USD
CY2020	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	9300000	USD
CY2019	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	10200000	USD
CY2018	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	900000	USD
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	-4400000	USD
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	-5800000	USD
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	-4700000	USD
CY2020	us-gaap	Income Tax Reconciliation Tax Contingencies Other IncomeTaxReconciliationTaxContingenciesOther	-9700000	USD
CY2019	us-gaap	Income Tax Reconciliation Tax Contingencies Other IncomeTaxReconciliationTaxContingenciesOther	200000	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Contingencies Other IncomeTaxReconciliationTaxContingenciesOther	1500000	USD
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-900000	USD
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	0	USD
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	2100000	USD
CY2020	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	2400000	USD
CY2019	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	200000	USD
CY2018	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-5700000	USD
CY2020	cmp	Income Tax Reconciliation Interest Expense Recognition Differences IncomeTaxReconciliationInterestExpenseRecognitionDifferences	-3500000	USD
CY2019	cmp	Income Tax Reconciliation Interest Expense Recognition Differences IncomeTaxReconciliationInterestExpenseRecognitionDifferences	-3500000	USD
CY2018	cmp	Income Tax Reconciliation Interest Expense Recognition Differences IncomeTaxReconciliationInterestExpenseRecognitionDifferences	-3600000	USD
CY2020	cmp	Effective Income Tax Rate Reconciliation Global Intangible Low Taxed Income EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncome	3800000	USD
CY2019	cmp	Effective Income Tax Rate Reconciliation Global Intangible Low Taxed Income EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncome	1000000.0	USD
CY2018	cmp	Effective Income Tax Rate Reconciliation Global Intangible Low Taxed Income EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncome	1000000.0	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Amount EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Amount	0	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Amount EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Amount	1600000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Amount EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Amount	-3000000.0	USD
CY2020	us-gaap	Income Tax Reconciliation Repatriation Of Foreign Earnings IncomeTaxReconciliationRepatriationOfForeignEarnings	0	USD
CY2019	us-gaap	Income Tax Reconciliation Repatriation Of Foreign Earnings IncomeTaxReconciliationRepatriationOfForeignEarnings	900000	USD
CY2018	us-gaap	Income Tax Reconciliation Repatriation Of Foreign Earnings IncomeTaxReconciliationRepatriationOfForeignEarnings	3400000	USD
CY2020	us-gaap	Income Tax Reconciliation Tax Settlements IncomeTaxReconciliationTaxSettlements	0	USD
CY2019	us-gaap	Income Tax Reconciliation Tax Settlements IncomeTaxReconciliationTaxSettlements	0	USD
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.26
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.11
CY2018	us-gaap	Income Tax Reconciliation Tax Settlements IncomeTaxReconciliationTaxSettlements	2200000	USD
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-300000	USD
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-500000	USD
CY2018	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-1600000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11700000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	22100000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8800000	USD
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.16
CY2020Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	11600000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	13700000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	66500000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	63700000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	22200000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	29100000	USD
CY2020Q4	cmp	Deferred Tax Liabilities Right Of Use Lease Asset DeferredTaxLiabilitiesRightOfUseLeaseAsset	1900000	USD
CY2019Q4	cmp	Deferred Tax Liabilities Right Of Use Lease Asset DeferredTaxLiabilitiesRightOfUseLeaseAsset	900000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	90600000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	93700000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	87500000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	89900000	USD
CY2018	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	-7200000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	43400000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	41200000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	28800000	USD
CY2020	cmp	Unrecognized Tax Benefits Including Interest Reduction Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsIncludingInterestReductionResultingFromLapseOfApplicableStatuteOfLimitations	11000000.0	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	47400000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	50900000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	67400000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	0	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	200000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	8000000.0	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	1400000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	4500000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	2600000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	25000000.0	USD
CY2020	cmp	Unrecognized Tax Benefits Decrease Due To Cash Payments UnrecognizedTaxBenefitsDecreaseDueToCashPayments	0	USD
CY2019	cmp	Unrecognized Tax Benefits Decrease Due To Cash Payments UnrecognizedTaxBenefitsDecreaseDueToCashPayments	7500000	USD
CY2018	cmp	Unrecognized Tax Benefits Decrease Due To Cash Payments UnrecognizedTaxBenefitsDecreaseDueToCashPayments	0	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	100000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	400000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	300000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	10400000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	300000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	1800000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	38300000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	47400000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	50900000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	2000000.0	USD
CY2019	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	4600000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	-2100000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	22300000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	20300000	USD
CY2018	us-gaap	Foreign Earnings Repatriated ForeignEarningsRepatriated	150000000	USD
CY2019	us-gaap	Income Tax Reconciliation Repatriation Of Foreign Earnings IncomeTaxReconciliationRepatriationOfForeignEarnings	900000	USD
CY2018	us-gaap	Income Tax Reconciliation Repatriation Of Foreign Earnings IncomeTaxReconciliationRepatriationOfForeignEarnings	3400000	USD
CY2020Q4	cmp	Foreign Earnings Outside Basis Difference ForeignEarningsOutsideBasisDifference	213600000	USD
CY2017	cmp	Income Tax Settlement Increase In Sales IncomeTaxSettlementIncreaseInSales	85700000	USD
CY2018	cmp	Income Tax Settlement Intercompany Payments IncomeTaxSettlementIntercompanyPayments	85700000	USD
CY2018Q4	us-gaap	Income Tax Examination Liability Refund Adjustment From Settlement With Taxing Authority IncomeTaxExaminationLiabilityRefundAdjustmentFromSettlementWithTaxingAuthority	17500000	USD
CY2019	us-gaap	Tax Adjustments Settlements And Unusual Provisions TaxAdjustmentsSettlementsAndUnusualProvisions	5300000	USD
CY2019	cmp	Income Tax Settlement Intercompany Payments IncomeTaxSettlementIntercompanyPayments	106100000	USD
CY2020Q4	us-gaap	Income Tax Examination Liability Refund Adjustment From Settlement With Taxing Authority IncomeTaxExaminationLiabilityRefundAdjustmentFromSettlementWithTaxingAuthority	1400000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Weighted Average Asset Allocations DefinedBenefitPlanWeightedAverageAssetAllocations	1
CY2019Q4	us-gaap	Defined Benefit Plan Weighted Average Asset Allocations DefinedBenefitPlanWeightedAverageAssetAllocations	1
CY2020Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	72100000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	65600000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	9400000	USD
CY2020Q4	cmp	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Before Adjustment Of Prior Service Cost Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansBeforeAdjustmentOfPriorServiceCostNetOfTax	-10400000	USD
CY2020Q4	cmp	Accumulated Other Comprehensive Income Loss Relatedto Prior Service Cost Netof Tax AccumulatedOtherComprehensiveIncomeLossRelatedtoPriorServiceCostNetofTax	1000000.0	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	6800000	USD
CY2019Q4	cmp	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Before Adjustment Of Prior Service Cost Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansBeforeAdjustmentOfPriorServiceCostNetOfTax	-7900000	USD
CY2019Q4	cmp	Accumulated Other Comprehensive Income Loss Relatedto Prior Service Cost Netof Tax AccumulatedOtherComprehensiveIncomeLossRelatedtoPriorServiceCostNetofTax	1100000	USD
CY2020	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-2900000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-800000	USD
CY2020	us-gaap	Other Comprehensive Income Defined Benefit Plan Net Prior Service Costs Credit Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax	100000	USD
CY2020	cmp	Other Comprehensive Income Loss Defined Benefit Plan Foreign Exchange Gain Loss After Tax OtherComprehensiveIncomeLossDefinedBenefitPlanForeignExchangeGainLossAfterTax	300000	USD
CY2019	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-2400000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-400000	USD
CY2019	us-gaap	Other Comprehensive Income Defined Benefit Plan Net Prior Service Costs Credit Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax	100000	USD
CY2019	cmp	Other Comprehensive Income Loss Defined Benefit Plan Foreign Exchange Gain Loss After Tax OtherComprehensiveIncomeLossDefinedBenefitPlanForeignExchangeGainLossAfterTax	300000	USD
CY2018	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-1200000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-300000	USD
CY2018	us-gaap	Other Comprehensive Income Defined Benefit Plan Net Prior Service Costs Credit Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax	100000	USD
CY2018	cmp	Other Comprehensive Income Loss Defined Benefit Plan Foreign Exchange Gain Loss After Tax OtherComprehensiveIncomeLossDefinedBenefitPlanForeignExchangeGainLossAfterTax	-400000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Expected Amortization Next Fiscal Year DefinedBenefitPlanExpectedAmortizationNextFiscalYear	1400000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Expected Amortization Of Gain Loss Next Fiscal Year DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear	-1500000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Expected Amortization Of Prior Service Cost Credit Next Fiscal Year DefinedBenefitPlanExpectedAmortizationOfPriorServiceCostCreditNextFiscalYear	100000	USD
CY2020	cmp	Defined Benefit Plan Net Periodic Benefit Cost Expected In Next Fiscal Year DefinedBenefitPlanNetPeriodicBenefitCostExpectedInNextFiscalYear	100000	USD
CY2020	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate	0.0120
CY2019	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate	0.0200
CY2018	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate	0.0290
CY2020	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.0310
CY2019	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.0310
CY2018	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.0370
CY2020Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Next Twelve Months DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths	3200000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Two DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo	3200000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Three DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree	3300000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Four DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour	3400000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Five DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive	3400000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Five Fiscal Years Thereafter DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter	18400000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	64100000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	58600000	USD
CY2020	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	1200000	USD
CY2019	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	1700000	USD
CY2020	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	-8300000	USD
CY2019	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	-4800000	USD
CY2020	us-gaap	Defined Benefit Plan Plan Amendments DefinedBenefitPlanPlanAmendments	100000	USD
CY2019	us-gaap	Defined Benefit Plan Plan Amendments DefinedBenefitPlanPlanAmendments	0	USD
CY2020	us-gaap	Defined Benefit Plan Benefit Obligation Benefits Paid DefinedBenefitPlanBenefitObligationBenefitsPaid	2900000	USD
CY2019	us-gaap	Defined Benefit Plan Benefit Obligation Benefits Paid DefinedBenefitPlanBenefitObligationBenefitsPaid	3500000	USD
CY2020	us-gaap	Defined Benefit Plan Foreign Currency Exchange Rate Changes Benefit Obligation DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation	-2500000	USD
CY2019	us-gaap	Defined Benefit Plan Foreign Currency Exchange Rate Changes Benefit Obligation DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation	-2500000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	73300000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	64100000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	65600000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	60700000	USD
CY2020	us-gaap	Defined Benefit Plan Actual Return On Plan Assets DefinedBenefitPlanActualReturnOnPlanAssets	6700000	USD
CY2019	us-gaap	Defined Benefit Plan Actual Return On Plan Assets DefinedBenefitPlanActualReturnOnPlanAssets	4200000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Funded Status Of Plan DefinedBenefitPlanFundedStatusOfPlan	1500000	USD
CY2020	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	400000	USD
CY2019	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	1700000	USD
CY2020	us-gaap	Defined Benefit Plan Plan Assets Foreign Currency Translation Gain Loss DefinedBenefitPlanPlanAssetsForeignCurrencyTranslationGainLoss	2300000	USD
CY2019	us-gaap	Defined Benefit Plan Plan Assets Foreign Currency Translation Gain Loss DefinedBenefitPlanPlanAssetsForeignCurrencyTranslationGainLoss	2500000	USD
CY2020	us-gaap	Defined Benefit Plan Plan Assets Benefits Paid DefinedBenefitPlanPlanAssetsBenefitsPaid	2900000	USD
CY2019	us-gaap	Defined Benefit Plan Plan Assets Benefits Paid DefinedBenefitPlanPlanAssetsBenefitsPaid	3500000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	72100000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	65600000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Funded Status Of Plan DefinedBenefitPlanFundedStatusOfPlan	-1200000	USD
CY2020Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	1200000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Funded Status Of Plan DefinedBenefitPlanFundedStatusOfPlan	1500000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	73300000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	64100000	USD
CY2020	cmp	Period Of Amortization Of Pension Benefit Obligations PeriodOfAmortizationOfPensionBenefitObligations	P5Y
CY2020	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	1200000	USD
CY2019	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	1700000	USD
CY2018	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	1600000	USD
CY2020	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	-100000	USD
CY2019	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	-100000	USD
CY2018	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	-100000	USD
CY2020	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	1900000	USD
CY2019	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	2200000	USD
CY2018	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	2500000	USD
CY2020	us-gaap	Defined Benefit Plan Plan Amendments DefinedBenefitPlanPlanAmendments	100000	USD
CY2019	us-gaap	Defined Benefit Plan Plan Amendments DefinedBenefitPlanPlanAmendments	0	USD
CY2018	us-gaap	Defined Benefit Plan Plan Amendments DefinedBenefitPlanPlanAmendments	0	USD
CY2020	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-1000000.0	USD
CY2019	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-500000	USD
CY2018	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-300000	USD
CY2020	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	300000	USD
CY2019	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	-100000	USD
CY2018	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	-700000	USD
CY2020	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	12500000	USD
CY2019	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	11600000	USD
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	12600000	USD
CY2020Q4	us-gaap	Trading Securities TradingSecurities	1900000	USD
CY2019Q4	us-gaap	Trading Securities TradingSecurities	1400000	USD
CY2020Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	1414300000	USD
CY2019Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	1430800000	USD
CY2020Q4	us-gaap	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet	12900000	USD
CY2019Q4	us-gaap	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet	14800000	USD
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	1401400000	USD
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	1416000000.0	USD
CY2020Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	63700000	USD
CY2019Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	52100000	USD
CY2020Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1337700000	USD
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1363900000	USD
CY2020Q3	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	15400000	USD
CY2019Q4	us-gaap	Short Term Debt Refinanced Amount ShortTermDebtRefinancedAmount	17400000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	63700000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	57800000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	72500000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	270000000.0	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	450300000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	500000000.0	USD
CY2020Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	1414300000	USD
CY2020	cmp	Period Hedging Portions Considered In Advance Of Forecasted Purchase PeriodHedgingPortionsConsideredInAdvanceOfForecastedPurchase	36 months
CY2019Q4	cmp	Derivative Number Of Counterparties DerivativeNumberOfCounterparties	2	counterparty
CY2020Q4	cmp	Loss Contingency Other Labor Matters Maximum Exposure LossContingencyOtherLaborMattersMaximumExposure	16000000	USD
CY2019Q4	cmp	Loss Contingency Other Labor Matters Maximum Exposure LossContingencyOtherLaborMattersMaximumExposure	25000000	USD
CY2020Q4	cmp	Global Workforce Represented By Labor Unions GlobalWorkforceRepresentedByLaborUnions	0.30
CY2020Q4	cmp	Number Of Collective Bargaining Agreements NumberOfCollectiveBargainingAgreements	12	agreement
CY2020Q4	cmp	Number Of Collective Bargaining Agreements Expiring In Next Fiscal Year NumberOfCollectiveBargainingAgreementsExpiringInNextFiscalYear	2	agreement
CY2020Q4	cmp	Number Of Collective Bargaining Agreements Expiring Current NumberOfCollectiveBargainingAgreementsExpiringCurrent	1	agreement
CY2020Q4	cmp	Number Of Collective Bargaining Agreements Expiring In Year Two NumberOfCollectiveBargainingAgreementsExpiringInYearTwo	5	agreement
CY2020Q4	cmp	Number Of Collective Bargaining Agreements Expiring In Year Three NumberOfCollectiveBargainingAgreementsExpiringInYearThree	3	agreement
CY2020Q4	cmp	Number Of Collective Bargaining Agreements Expiring Thereafter NumberOfCollectiveBargainingAgreementsExpiringThereafter	1	agreement
CY2020	us-gaap	Royalty Expense RoyaltyExpense	18300000	USD
CY2019	us-gaap	Royalty Expense RoyaltyExpense	16300000	USD
CY2018	us-gaap	Royalty Expense RoyaltyExpense	14800000	USD
CY2020Q4	us-gaap	Guarantee Obligations Maximum Exposure GuaranteeObligationsMaximumExposure	51400000	USD
CY2020Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On First Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary	43600000	USD
CY2020Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Second Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary	13300000	USD
CY2020Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Third Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary	10000000.0	USD
CY2020Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Fourth Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary	7800000	USD
CY2020Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Fifth Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary	2100000	USD
CY2020Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Due After Five Years UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears	7500000	USD
CY2020	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	2.88
CY2020Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	10000000	shares
CY2020Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2020Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2019Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Outstanding Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	887867	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	416860	shares
CY2020Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Outstanding Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	868772	shares
CY2020	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Remaining Contractual Term2 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2	P4Y1M6D
CY2020Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Exercise Price Beginning Balance1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	63.06
CY2020Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Exercisable Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions	496715	shares
CY2020	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Exercisable Options Weighted Average Remaining Contractual Term2 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageRemainingContractualTerm2	P3Y1M6D
CY2020Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Exercisable Options Weighted Average Exercise Price1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1	68.05
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	9900000	USD
CY2020	cmp	Share Based Payment Arrangement Expense Cash ShareBasedPaymentArrangementExpenseCash	500000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	7400000	USD
CY2019	cmp	Share Based Payment Arrangement Expense Cash ShareBasedPaymentArrangementExpenseCash	1100000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	7800000	USD
CY2020Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	14700000	USD
CY2020	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P1Y9M18D
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	496715	shares
CY2020	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	-108800000	USD
CY2020	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	2400000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-111200000	USD
CY2019	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	20600000	USD
CY2019	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	1800000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	18800000	USD
CY2020Q4	us-gaap	Investments Fair Value Disclosure InvestmentsFairValueDisclosure	1900000	USD
CY2020Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	4700000	USD
CY2020Q4	cmp	Liabilities Related To Nonqualified Savings Plan Fair Value Disclosure LiabilitiesRelatedToNonqualifiedSavingsPlanFairValueDisclosure	1900000	USD
CY2020Q4	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	1900000	USD
CY2019Q4	us-gaap	Investments Fair Value Disclosure InvestmentsFairValueDisclosure	1400000	USD
CY2019Q4	us-gaap	Derivative Assets DerivativeAssets	2800000	USD
CY2019Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	4200000	USD
CY2019Q4	cmp	Liabilities Related To Nonqualified Savings Plan Fair Value Disclosure LiabilitiesRelatedToNonqualifiedSavingsPlanFairValueDisclosure	1400000	USD
CY2019Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	600000	USD
CY2019Q4	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	2000000.0	USD
CY2020Q4	us-gaap	Investments Fair Value Disclosure InvestmentsFairValueDisclosure	1900000	USD
CY2019Q4	us-gaap	Investments Fair Value Disclosure InvestmentsFairValueDisclosure	1400000	USD
CY2020	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	3	segment
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1373500000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	140500000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	137900000	USD
CY2020Q4	us-gaap	Assets Assets	2262400000	USD
CY2020	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	84900000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1490500000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	163600000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	137900000	USD
CY2019Q4	us-gaap	Assets Assets	2443200000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1490500000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1493600000	USD
CY2019	cmp	Logistic Costs LogisticCosts	2800000	USD
CY2019	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	98100000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1493600000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	130300000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	136900000	USD
CY2018Q4	us-gaap	Assets Assets	2367900000	USD
CY2018	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	96800000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1373500000	USD
CY2019	us-gaap	Severance Costs1 SeveranceCosts1	2300000	USD
CY2018	us-gaap	Severance Costs1 SeveranceCosts1	5100000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1373500000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1490500000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1493600000	USD
CY2020Q4	us-gaap	Noncurrent Assets NoncurrentAssets	1503300000	USD
CY2019	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
CY2018	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
CY2019Q4	us-gaap	Noncurrent Assets NoncurrentAssets	1655300000	USD
CY2018Q4	us-gaap	Noncurrent Assets NoncurrentAssets	1642800000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	59500000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	62500000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	68800000	USD
CY2020	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	1300000	USD
CY2019	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	1100000	USD
CY2018	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	500000	USD
CY2020	cmp	Net Earnings Allocated To Participating Securities NetEarningsAllocatedToParticipatingSecurities	397000	shares
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	58200000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	61400000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	68300000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	33928000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	33882000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	33848000	shares
CY2020	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	33928000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	33882000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	33848000	shares
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.72
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.82
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.02
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.72
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.81
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.02
CY2019	cmp	Net Earnings Allocated To Participating Securities NetEarningsAllocatedToParticipatingSecurities	307000	shares
CY2018	cmp	Net Earnings Allocated To Participating Securities NetEarningsAllocatedToParticipatingSecurities	186000	shares
CY2020Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	413900000	USD
CY2020Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	256100000	USD
CY2020Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	282400000	USD
CY2020Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	421100000	USD
CY2020Q1	us-gaap	Gross Profit GrossProfit	87300000	USD
CY2020Q2	us-gaap	Gross Profit GrossProfit	66300000	USD
CY2020Q3	us-gaap	Gross Profit GrossProfit	58700000	USD
CY2020Q4	us-gaap	Gross Profit GrossProfit	100000000.0	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	27600000	USD
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.80
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.04
CY2020Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	33892000	shares
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	1700000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	-2100000	USD
CY2020Q4	us-gaap	Net Income Loss NetIncomeLoss	32300000	USD
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.80
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.04
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.07
CY2020Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.94
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.07
CY2020Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.94
CY2020Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	33892000	shares
CY2020Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	33915000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	33947000	shares
CY2020Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	33958000	shares
CY2020Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	33915000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	33947000	shares
CY2020Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	33977000	shares
CY2019Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	403700000	USD
CY2019Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	245200000	USD
CY2019Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	341300000	USD
CY2019Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	500300000	USD
CY2019Q1	us-gaap	Gross Profit GrossProfit	72600000	USD
CY2019Q2	us-gaap	Gross Profit GrossProfit	45800000	USD
CY2019Q3	us-gaap	Gross Profit GrossProfit	76400000	USD
CY2019Q4	us-gaap	Gross Profit GrossProfit	142000000.0	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	7600000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	-11800000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	10600000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	56100000	USD
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.22
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.36
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.31
CY2019Q2	cmp	Logistic Costs LogisticCosts	2800000	USD
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.64
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.22
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.36
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.31
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.63
CY2019Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	33874000	shares
CY2019Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	33883000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	33884000	shares
CY2019Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	33886000	shares
CY2019Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	33874000	shares
CY2019Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	33883000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	33884000	shares
CY2019Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	33886000	shares
CY2020Q4	cmp	Release Of Tax Reserve Domestic ReleaseOfTaxReserveDomestic	-11000000.0	USD
CY2019Q2	cmp	Additional Logistics Costs Net Of Tax AdditionalLogisticsCostsNetOfTax	2100000	USD
CY2019Q3	cmp	Executive Transition Costs Gross ExecutiveTransitionCostsGross	2300000	USD
CY2019Q3	cmp	Executive Transition Costs Net Of Tax ExecutiveTransitionCostsNetOfTax	1700000	USD

Files In Submission

Name	View Source	Status
0001227654-21-000037-index-headers.html	Edgar Link	pending
0001227654-21-000037-index.html	Edgar Link	pending
0001227654-21-000037.txt	Edgar Link	pending
0001227654-21-000037-xbrl.zip	Edgar Link	pending
cmp-20201231.htm	Edgar Link	pending
cmp-20201231.xsd	Edgar Link	pending
cmp-20201231x10kxex1023.htm	Edgar Link	pending
cmp-20201231x10kxex211.htm	Edgar Link	pending
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cmp-20201231x10kxex95.htm	Edgar Link	pending
cmp-20201231_cal.xml	Edgar Link	unprocessable
cmp-20201231_def.xml	Edgar Link	unprocessable
cmp-20201231_g1.jpg	Edgar Link	pending
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cmp-20201231_g9.jpg	Edgar Link	pending
cmp-20201231_htm.xml	Edgar Link	completed
cmp-20201231_lab.xml	Edgar Link	unprocessable
cmp-20201231_pre.xml	Edgar Link	unprocessable
compasslogo_colora311.jpg	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$CMP
COMPASS MINERALS INTERNATIONAL INC Stock $cmp

2020 Q4 Form 10-K Financial Statement

#000122765421000037 Filed on February 26, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CMP COMPASS MINERALS INTERNATIONAL INC Stock $cmp

2020 Q4 Form 10-K Financial Statement

#000122765421000037 Filed on February 26, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CMP
COMPASS MINERALS INTERNATIONAL INC Stock $cmp