Leases - Schedule of Components of Lease Cost (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Leases [Abstract]
Operating lease cost	$ 13.3	$ 25.2	$ 27.3	$ 60.8
Short-term lease	4.2	5.4	8.9	14.2
Variable lease	8.4	1.9	12.0	9.7
Operating lease cost	25.9	32.5	48.2	84.7
Amortization of leased assets	1.5	0.8	3.0	1.5
Interest on lease liabilities	0.3	0.3	0.6	0.5
Lease impairment		16.7	0.1	94.2
Net lease cost	$ 27.7	$ 50.3	$ 51.9	$ 180.9