Revenue Major Geographical Area (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Total revenues:
Total revenue	$ 2,322.6	$ 2,495.9
Net revenue	1,996.3	2,182.9
United States
Total revenues:
Total revenue	1,573.9	1,662.0
Net revenue	1,358.2	1,476.3
United Kingdom
Total revenues:
Total revenue	182.3	210.9
Net revenue	159.4	178.0
Continental Europe
Total revenues:
Total revenue	195.2	203.9
Net revenue	169.3	179.5
Asia Pacific
Total revenues:
Total revenue	147.1	173.1
Net revenue	119.3	142.8
Latin America
Total revenues:
Total revenue	79.1	92.6
Net revenue	72.5	87.1
Other
Total revenues:
Total revenue	145.0	153.4
Net revenue	117.6	119.2
International
Total revenues:
Total revenue	748.7	833.9
Net revenue	638.1	706.6
MD&E
Total revenues:
Total revenue	902.7	973.3
Net revenue	888.8	961.3
MD&E | United States
Total revenues:
Total revenue	606.6	637.7
Net revenue	601.7	633.5
MD&E | International
Total revenues:
Total revenue	296.1	335.6
Net revenue	287.1	327.8
IA&C
Total revenues:
Total revenue	861.5	963.8
Net revenue	780.6	881.4
IA&C | United States
Total revenues:
Total revenue	542.9	624.6
Net revenue	516.4	600.7
IA&C | International
Total revenues:
Total revenue	318.6	339.2
Net revenue	264.2	280.7
SC&E
Total revenues:
Total revenue	558.4	558.8
Net revenue	326.9	340.2
SC&E | United States
Total revenues:
Total revenue	424.4	399.7
Net revenue	240.1	242.1
SC&E | International
Total revenues:
Total revenue	134.0	159.1
Net revenue	$ 86.8	$ 98.1