Leases - Summary of Lease Cost (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Leases [Abstract]
Operating lease cost	$ 40.4	$ 41.1	$ 83.5	$ 82.3
Short-term cost	2.1	3.4	4.1	6.9
Variable lease cost	1.8	1.8	4.2	3.3
Amortization of leased assets	0.0	0.1	0.1	0.3
Interest on lease liabilities	0.1	0.1	0.2	0.2
Total lease cost	$ 44.4	$ 46.5	$ 92.1	$ 93.0