Revenue Major Geographical Area (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Total revenues:
Total revenue	$ 2,568.5	$ 2,257.0
Net revenue	2,227.2	2,027.7
United States
Total revenues:
Total revenue	1,650.4	1,425.8
Net revenue	1,470.1	1,309.8
United Kingdom
Total revenues:
Total revenue	232.1	203.5
Net revenue	182.4	184.0
Continental Europe
Total revenues:
Total revenue	204.7	195.6
Net revenue	179.3	175.8
Asia Pacific
Total revenues:
Total revenue	215.3	210.9
Net revenue	174.6	169.1
Latin America
Total revenues:
Total revenue	94.4	83.6
Net revenue	87.7	75.4
Other
Total revenues:
Total revenue	171.6	137.6
Net revenue	133.1	113.6
International
Total revenues:
Total revenue	918.1	831.2
Net revenue	757.1	717.9
MD&E
Total revenues:
Total revenue	955.8	871.5
Net revenue	932.1	849.8
MD&E | United States
Total revenues:
Total revenue	599.2	534.6
Net revenue	587.8	527.7
MD&E | International
Total revenues:
Total revenue	356.6	336.9
Net revenue	344.3	322.1
IA&C
Total revenues:
Total revenue	1,054.2	953.9
Net revenue	958.8	875.7
IA&C | United States
Total revenues:
Total revenue	673.9	599.9
Net revenue	646.4	574.4
IA&C | International
Total revenues:
Total revenue	380.3	354.0
Net revenue	312.4	301.3
SC&E
Total revenues:
Total revenue	558.5	431.6
Net revenue	336.3	302.2
SC&E | United States
Total revenues:
Total revenue	377.3	291.3
Net revenue	235.9	207.7
SC&E | International
Total revenues:
Total revenue	181.2	140.3
Net revenue	$ 100.4	$ 94.5