Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended			24 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2016
Valuation Allowance [Line Items]
Net favorable adjustment		$ 13.0	$ 70.0	$ 83.0
One-time TCJA Transition Tax, additional expense		1.0	135.0
Additional tax benefit for deferred tax revaluation		14.0	205.0
Income taxes paid	$ 145.0	89.0	196.0
Net deferred tax liabilities	714.7	523.4		523.4
Valuation allowance	58.4	40.3		40.3
Valuation allowance increase	18.0	14.0
Operating loss carryforwards	886.0
Operating loss carryforward tax benefit	130.0
Operating loss carryforwards tax benefit valuation allowance	42.0
Tax credit carryforward	41.0
Unrecognized tax benefits, gross	214.9	133.4	$ 59.0	133.4	$ 28.6
Unrecognized tax benefits, net	231.0	144.0		144.0
Income tax interest and penalties	23.0	16.0		16.0
Indirect tax benefits	7.0	5.0		5.0
Potential income tax interest and penalties	8.0	4.0
Foreign earnings repatriated		275.0
Foreign earnings liability		0.0		0.0
Foreign earnings reinvested indefinitely	2,400.0
Domestic Tax Authority
Valuation Allowance [Line Items]
Net deferred tax liabilities	659.0	559.0		559.0
Valuation allowance	22.0	13.0		13.0
Operating loss carryforwards	225.0
State and Local Jurisdiction
Valuation Allowance [Line Items]
Operating loss carryforwards	347.0
Foreign Tax Authority
Valuation Allowance [Line Items]
Net deferred tax liabilities	56.0
Valuation allowance	36.0	27.0		27.0
Net deferred tax assets		$ 36.0		$ 36.0
Operating loss carryforwards	314.0
Separation Related
Valuation Allowance [Line Items]
Valuation allowance for tax credit carryforward	$ 13.0