Leases - Summary of Lease Cost (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Leases [Abstract]
Operating lease cost	$ 32.3	$ 39.2	$ 103.4	$ 122.7
Short-term cost	6.3	5.4	25.5	9.5
Variable lease cost	2.5	2.9	7.6	7.1
Total lease cost	$ 41.1	$ 47.5	$ 136.5	$ 139.3