Revenue Major Geographical Area (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Total revenues:
Total revenue	$ 2,521.0	$ 2,568.5
Net revenue	2,176.9	2,227.2
United States
Total revenues:
Total revenue	1,683.2	1,650.4
Net revenue	1,470.6	1,470.1
United Kingdom
Total revenues:
Total revenue	195.8	232.1
Net revenue	170.2	182.4
Continental Europe
Total revenues:
Total revenue	193.6	204.7
Net revenue	163.7	179.3
Asia Pacific
Total revenues:
Total revenue	191.9	215.3
Net revenue	159.2	174.6
Latin America
Total revenues:
Total revenue	90.7	94.4
Net revenue	84.7	87.7
Other
Total revenues:
Total revenue	165.8	171.6
Net revenue	128.5	133.1
International
Total revenues:
Total revenue	837.8	918.1
Net revenue	706.3	757.1
MD&E
Total revenues:
Total revenue	981.8	996.8
Net revenue	960.8	973.7
MD&E | United States
Total revenues:
Total revenue	648.3	640.3
Net revenue	635.9	628.5
MD&E | International
Total revenues:
Total revenue	333.5	356.5
Net revenue	324.9	345.2
IA&C
Total revenues:
Total revenue	964.1	1,012.6
Net revenue	875.6	916.9
IA&C | United States
Total revenues:
Total revenue	623.7	632.8
Net revenue	593.7	605.7
IA&C | International
Total revenues:
Total revenue	340.4	379.8
Net revenue	281.9	311.2
SC&E
Total revenues:
Total revenue	575.1	559.1
Net revenue	340.5	336.6
SC&E | United States
Total revenues:
Total revenue	411.2	377.3
Net revenue	241.0	235.9
SC&E | International
Total revenues:
Total revenue	163.9	181.8
Net revenue	$ 99.5	$ 100.7