Revenue - Revenues by Geographic Areas (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues by Geographic Areas [Line Items]
Total revenues	$ 1,509.0	$ 1,368.4	$ 2,876.0	$ 2,677.7
United States
Revenues by Geographic Areas [Line Items]
Total revenues	1,309.0	1,172.9	2,475.7	2,297.7
Canada and Mexico
Revenues by Geographic Areas [Line Items]
Total revenues	143.5	155.3	301.8	301.2
North America
Revenues by Geographic Areas [Line Items]
Total revenues	1,452.5	1,328.2	2,777.5	2,598.9
All other foreign countries
Revenues by Geographic Areas [Line Items]
Total revenues	$ 56.5	$ 40.2	$ 98.5	$ 78.8