Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Loss Carryforwards [Line Items]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Business Acquired		$ 163.6	$ 0.0	$ 0.0
Summary Pretax Income [Abstract]
U.S.		(1,046.7)	552.4	655.0
International		(39.2)	110.7	101.2
(Loss) income before income taxes and equity in net (loss) income of affiliates		(1,085.9)	663.1	756.2
Valuation Allowance, Deferred Tax Asset, Change in Amount		110.1	(3.2)	(2.2)
Valuation Allowances and Reserves, Depreciation and Amortization		0.0	0.2	0.1
Valuation Allowances and Reserves, Other		19.4	0.0	0.3
Valuation Allowances and Reserves, Other comprehensive income adjustment		16.9	0.0	0.0
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount					$ 340.9	$ 10.2	$ 13.2	$ 15.0
Valuation Allowances and Reserves, Net operating losses		20.7	0.0	0.0
Current
Federal		(301.0)	57.8	159.4
State		(5.5)	0.7	4.1
Foreign		(8.1)	(12.8)	11.4
Total current		(314.6)	45.7	174.9
Deferred
Federal		(16.2)	71.8	(27.8)
State		106.9	(11.4)	(12.8)
Foreign		3.7	26.7	5.5
Total Deferred		94.4	87.1	(35.1)
Total income tax provision		(220.2)	132.8	139.8
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Tax at U.S. Federal statutory rate		(228.1)	139.3	158.8
State income taxes, net of Federal benefit		(28.1)	14.9	18.1
State income tax credits, net of Federal benefit		(17.4)	(22.6)	(22.7)
Foreign rate differences		(3.3)	(7.1)	(6.2)
Research and experimentation		(0.1)	0.7	(5.4)
Valuation Allowance - U.S. Deferred Tax Asset	$ 150.2	$ 150.2
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent		9.70%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount		$ (104.8)
Other		(4.8)	(0.6)	0.2
Total income tax provision		$ (220.2)	$ 132.8	$ 139.8
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Tax at U.S. Federal statutory rate		21.00%	21.00%	21.00%
State income taxes, net of Federal benefit		2.60%	2.30%	2.40%
State income tax credits, net of Federal benefit		1.60%	(3.40%)	(3.00%)
Foreign rate differences		0.30%	(1.10%)	(0.80%)
Research and experimentation		0.00%	(0.10%)	0.70%
Valuation Allowance - U.S. Deferred Tax Asset		(13.80%)
Other		0.50%	(0.10%)	0.00%
Effective Income Tax Rate Reconciliation, Percent		20.30%	20.00%	18.50%
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount		$ 1.7	$ (2.0)	$ 0.0
Effective Income Tax Rate Reconciliation,Other Reconciling Items, Percent		(0.20%)	(0.30%)	0.00%
Effective Tax Reconciliation- GILTI		$ 3.9	$ 7.1	$ 1.8
Effective Income Tax Reconciliation, GILTI Tax, Percent		(0.40%)	1.10%	0.20%
Effective Income Tax Rate Reconciliation, Excess Tax Benefit		$ 0.1	$ (2.5)	$ (4.0)
EffectiveTaxRateRecon, ExcessTaxBenefit, Percentage		0.00%	(0.40%)	(0.50%)
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount		$ 10.5	$ 4.0	$ 4.6
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent		(1.00%)	0.60%	0.60%
Effective Income Tax Rate Reconciliation, Transition Tax, percent		0.00%	0.20%	(0.70%)
Effective Income Tax Rate Reconciliation, Transition Tax		$ 0.0	$ 1.6	$ (5.4)
Deferred Tax Assets, Tax Deferred Expense [Abstract]
Depreciation and amortization					165.7	107.5
Net operating loss carryforward					36.2	39.2
Deferred Tax Liabilities, Other Comprehensive Income					15.3
Deferred Tax Liabilities, Other						(88.5)
Accruals and reserves					(174.3)	(117.8)
Employee compensation accruals					1.2	0.4
Pension and other employee benefit plans					98.6	0.4
Deferred Tax Asset, Interest Carryforward					22.7	0.0
Deferred Tax Assets, State Taxes					122.8	108.3
Interest expense limitation					50.3	40.3
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Other					11.8	9.8
Deferred Tax Assets, Tax Deferred Expense, Other					8.0	8.6
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax					0.3	0.2
Net deferred tax asset before valuation allowance					328.0	108.4
Deferred Tax Liabilities, Net					(12.9)
Net deferred tax (liability)						98.2
Components of Deferred Tax Assets and Liabilities [Abstract]
Non-current deferred tax assets					0.1	106.5
Non-current deferred tax liabilities					(13.0)	(8.3)
Net non-current deferred tax asset (liability)						98.2
Total deferred tax asset (liability)						98.2
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning Balance		5.4	7.2	6.7
Gross increases related to current period tax positions		0.4	0.4	0.0
Gross increases related to prior period tax positions		0.0	0.0	0.5
Gross decreases related to prior period tax positions		0.0	(2.2)	0.0
Statute of limitations' expiration		(3.3)	0.0	0.0
Settlements		0.0	0.0	0.0
Ending Balance	16.5	16.5	5.4	7.2
Unrecognized Tax Benefits, Increase Resulting from Acquisition		14.0
Tax Credit Carryforward [Line Items]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate					15.3
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Unrecognized Tax Benefits	$ 16.5	$ 16.5	$ 7.2	$ 7.2	16.5	$ 5.4	$ 7.2	$ 6.7
Unrecognized Tax Benefits that Would Impact Effective Tax Rate					$ 15.3