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Debt - Schedule of Long-term Debt (Details) - USD ($) $ in Millions	Mar. 31, 2020	Jan. 22, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Unamortized debt issuance costs	$ (17.9)		$ (16.8)
Total debt	2,061.6		2,355.0
Less current portion of long-term debt	26.0		24.5
Total long-term debt	2,035.6		2,330.5
Credit facility \| Term credit facility
Debt Instrument [Line Items]
Long-term debt, gross	$ 0.0		371.4
Senior Notes \| 3.912% Senior Notes due 2021
Debt Instrument [Line Items]
Interest rate	3.912%
Long-term debt, gross	$ 500.0		500.0
Senior Notes \| 4.272% Senior Notes due 2023
Debt Instrument [Line Items]
Interest rate	4.272%
Long-term debt, gross	$ 750.0		750.0
Senior Notes \| 4.900% Senior Notes due 2028
Debt Instrument [Line Items]
Interest rate	4.90%
Long-term debt, gross	$ 750.0		750.0
Senior Notes \| TEU amortizing notes
Debt Instrument [Line Items]
Interest rate		5.00%
Long-term debt, gross	79.2		0.0
Other obligations
Debt Instrument [Line Items]
Long-term debt, gross	$ 0.3		$ 0.4