Revenue Major Geographical Area (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Total revenues:
Total revenue	$ 2,495.9	$ 2,521.0
Net revenue	2,182.9	2,176.9
United States
Total revenues:
Total revenue	1,662.0	1,683.2
Net revenue	1,476.3	1,470.6
United Kingdom
Total revenues:
Total revenue	210.9	195.8
Net revenue	178.0	170.2
Continental Europe
Total revenues:
Total revenue	203.9	193.6
Net revenue	179.5	163.7
Asia Pacific
Total revenues:
Total revenue	173.1	191.9
Net revenue	142.8	159.2
Latin America
Total revenues:
Total revenue	92.6	90.7
Net revenue	87.1	84.7
Other
Total revenues:
Total revenue	153.4	165.8
Net revenue	119.2	128.5
International
Total revenues:
Total revenue	833.9	837.8
Net revenue	706.6	706.3
MD&E
Total revenues:
Total revenue	973.3	986.9
Net revenue	961.3	965.9
MD&E | United States
Total revenues:
Total revenue	637.7	649.7
Net revenue	633.5	637.3
MD&E | International
Total revenues:
Total revenue	335.6	337.2
Net revenue	327.8	328.6
IA&C
Total revenues:
Total revenue	963.8	959.0
Net revenue	881.4	870.5
IA&C | United States
Total revenues:
Total revenue	624.6	622.3
Net revenue	600.7	592.3
IA&C | International
Total revenues:
Total revenue	339.2	336.7
Net revenue	280.7	278.2
SC&E
Total revenues:
Total revenue	558.8	575.1
Net revenue	340.2	340.5
SC&E | United States
Total revenues:
Total revenue	399.7	411.2
Net revenue	242.1	241.0
SC&E | International
Total revenues:
Total revenue	159.1	163.9
Net revenue	$ 98.1	$ 99.5