Leases - Components of Lease Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Lessee, Lease, Description [Line Items]
Operating lease costs	$ 37.4	$ 20.5
Financing lease costs:
Amortization of right-of-use assets	0.6	0.3
Interest on lease liabilities	2.1	0.0
Total financing lease costs	2.7	0.3
Variable lease costs	1.9	0.6
Total lease costs	42.0	21.4
Deemed Landlord Finance Lease
Financing lease costs:
Amortization of right-of-use assets	3.2	0.4
Interest on lease liabilities	10.1	1.5
Total financing lease costs	$ 13.3	$ 1.9