Financial Instruments - Effect of Derivative Instruments on Consolidated Statement of Operations and Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Interest rate Swaps
Derivative Instruments, Gain (Loss) [Line Items]
Amount of pre-tax gain or (loss) recognized in OCI on derivative	$ 10.0	$ (0.2)	$ 42.3	$ 1.6
Interest rate Swaps | Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) reclassified from accumulated OCI into income	0.2	(0.7)	(0.9)	(1.5)
Amount of gain or (loss) recognized in income on derivative	0.2	(0.7)	(0.9)	(1.5)
Cross-currency swaps
Derivative Instruments, Gain (Loss) [Line Items]
Amount of pre-tax gain or (loss) recognized in OCI on derivative	7.5	0.0	7.5	0.0
Cross-currency swaps | Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) reclassified from accumulated OCI into income	0.0	0.0	0.0	0.0
Amount of gain or (loss) recognized in income on derivative	0.0	0.0	0.0	0.0
Foreign exchange collar | Non-operating income (expenses) – net
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) recognized in income on derivative	0.0	0.0	0.0	(2.5)
Foreign exchange forward contracts | Non-operating income (expenses) – net
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) recognized in income on derivative	$ (11.7)	$ (1.4)	$ (14.9)	$ 1.5