Fair Value Measurements - Schedule of Fair Value of Hedges (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Gains (losses) recorded in accumulated other comprehensive loss, net of tax	$ 14.0
Other assets/(accrued liabilities) | Interest rate swap
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative fair value	0.2	$ (0.2)
Gains (losses) recorded in accumulated other comprehensive loss, net of tax	0.2	(0.2)	$ (6.9)
Other assets | Cross-currency interest rate swaps
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative fair value	18.0	$ 0.0
Gains (losses) recorded in accumulated other comprehensive loss, net of tax	$ 18.0