Leases - Components of Lease Expense and Other Information (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Leases [Abstract]
Operating lease expense		$ 32.9	$ 35.5
Short-term lease expense		1.2	1.5
Variable lease expense	[1]	4.7	4.9
Total lease expense		38.8	41.9
Supplemental Cash Flow Information
Cash paid for amounts included in the measurement of operating lease liabilities		33.3	34.7
Operating ROU assets obtained in exchange for lease obligations		$ 9.5	$ 11.0

[1] Other lease expense includes variable lease expense and sublease income.