Leases - Components of Lease Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease cost	$ 66.0	$ 68.5	$ 72.9
Finance lease cost:
Amortization of right-of-use assets	34.0	32.1	30.3
Interest on lease liabilities	30.9	29.3	29.5
Total finance lease cost	64.9	61.4	59.8
Short-term and variable lease cost	3.0	3.7	1.5
Sublease income	(3.1)	(3.2)	(3.2)
Total lease cost	$ 130.8	$ 130.4	$ 131.0