Leases - Supplemental Cash Flow and Other Information (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases	$ 135.2	$ 108.4
Operating cash flows for finance leases	2.0	0.2
Financing cash flows for finance leases	5.7	0.2
Supplemental non-cash amounts of lease liabilities arising from obtaining right of use assets	$ 224.3	1,014.1
Weighted average remaining lease term - operating leases	7 years 9 months 18 days
Weighted average remaining lease term - finance leases	7 years 7 months 6 days
Weighted average discount rate - operating leases	7.50%
Weighted average discount rate - finance leases	5.30%
Adjustments for New Accounting Pronouncement [Member]
Cash paid for amounts included in the measurement of lease liabilities:
Supplemental non-cash amounts of lease liabilities arising from obtaining right of use assets	$ 224.3	$ 160.1