Leases - Supplemental Cash Flow and Other Information (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases	$ 224.8	$ 215.2
Operating cash flows for finance leases	3.2	3.1
Financing cash flows for finance leases	10.7	8.9
Supplemental non-cash changes to lease liabilities from obtaining or remeasuring right of use assets	$ (126.5)	$ 690.7
Weighted average remaining lease term - operating leases	9 years 10 months 24 days
Weighted average remaining lease term - finance leases	6 years 8 months 12 days
Weighted average discount rate - operating leases	13.30%
Weighted average discount rate - finance leases	5.60%