Leases - Schedule of Components of Lease Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Lessor, Lease, Description [Line Items]
Operating lease cost	$ 81.1	$ 150.9
Short-term lease	22.6	33.1
Variable lease	20.1	58.1
Operating lease cost	123.8	242.1
Amortization of leased assets	4.2	2.3
Interest on lease liabilities	1.1	0.9
Lease impairment	97.1	0.0
Net lease cost	227.8	$ 245.3
General and Administrative Expense
Lessor, Lease, Description [Line Items]
Lease impairment	$ 1.6