Leases - Supplemental Cash Flow and Other Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases	$ 75.2	$ 60.8
Operating cash flows for finance leases	1.1	0.9
Financing cash flows for finance leases	3.5	2.6
Assets acquired or remeasured under operating and financing leases	$ (152.8)	$ 111.1
Weighted average remaining lease term - operating leases	10 years 1 month 6 days
Weighted average remaining lease term - finance leases	6 years 10 months 24 days
Weighted average discount rate - operating leases	13.10%
Weighted average discount rate - finance leases	5.50%