Revenue - Revenues by Geographic Areas (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues by Geographic Areas [Line Items]
Total revenues	$ 1,554.2	$ 1,413.3	$ 4,479.0	$ 4,289.3
United States
Revenues by Geographic Areas [Line Items]
Total revenues	1,307.5	1,205.8	3,753.6	3,681.6
Canada and Mexico
Revenues by Geographic Areas [Line Items]
Total revenues	189.9	160.5	558.8	462.3
North America
Revenues by Geographic Areas [Line Items]
Total revenues	1,497.4	1,366.3	4,312.4	4,143.9
All other foreign countries
Revenues by Geographic Areas [Line Items]
Total revenues	$ 56.8	$ 47.0	$ 166.6	$ 145.4