Leases - Schedule of Lease Cost and Related Cash Flow Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Leases [Abstract]
Operating lease expense	$ 42.9	$ 38.7
Variable lease expense	6.2	6.4
Operating cash flows from operating leases	42.7	38.3
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 43.5	$ 38.5