Revenue - Revenues by Geographic Areas (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenues by Geographic Areas [Line Items]
Total revenues	$ 1,507.7	$ 1,509.0	$ 2,924.7	$ 2,876.0
United States
Revenues by Geographic Areas [Line Items]
Total revenues	1,258.2	1,309.0	2,446.1	2,475.7
Canada and Mexico
Revenues by Geographic Areas [Line Items]
Total revenues	192.0	143.5	368.9	301.8
North America
Revenues by Geographic Areas [Line Items]
Total revenues	1,450.2	1,452.5	2,815.0	2,777.5
All other foreign countries
Revenues by Geographic Areas [Line Items]
Total revenues	$ 57.5	$ 56.5	$ 109.7	$ 98.5