Revenue Major Geographical Area (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Total revenues:
Total revenue	$ 2,628.8	$ 2,678.5	$ 7,834.7	$ 7,866.0
Net revenue	2,242.7	2,309.0	6,752.7	6,814.4
United States
Total revenues:
Total revenue	1,699.5	1,759.7	5,117.3	5,180.1
Net revenue	1,467.8	1,509.9	4,469.6	4,512.3
United Kingdom
Total revenues:
Total revenue	236.3	215.5	684.7	627.6
Net revenue	193.8	193.0	565.5	548.1
Continental Europe
Total revenues:
Total revenue	211.7	204.5	645.1	612.9
Net revenue	177.5	178.3	556.2	534.5
Asia Pacific
Total revenues:
Total revenue	190.8	203.8	566.5	607.4
Net revenue	156.9	175.3	467.0	511.8
Latin America
Total revenues:
Total revenue	117.9	120.0	320.7	321.1
Net revenue	111.9	114.8	301.2	301.9
Other
Total revenues:
Total revenue	172.6	175.0	500.4	516.9
Net revenue	134.8	137.7	393.2	405.8
International
Total revenues:
Total revenue	929.3	918.8	2,717.4	2,685.9
Net revenue	774.9	799.1	2,283.1	2,302.1
MD&E
Total revenues:
Total revenue	1,043.8	1,075.1	3,092.5	3,137.8
Net revenue	1,025.7	1,060.0	3,050.5	3,086.8
MD&E | United States
Total revenues:
Total revenue	662.1	671.6	1,980.4	1,997.4
Net revenue	656.3	665.2	1,967.6	1,974.9
MD&E | International
Total revenues:
Total revenue	381.7	403.5	1,112.1	1,140.4
Net revenue	369.4	394.8	1,082.9	1,111.9
IA&C
Total revenues:
Total revenue	940.6	960.6	2,903.8	2,924.6
Net revenue	848.9	877.7	2,640.4	2,656.5
IA&C | United States
Total revenues:
Total revenue	574.1	608.5	1,825.6	1,874.0
Net revenue	546.6	578.2	1,746.6	1,777.9
IA&C | International
Total revenues:
Total revenue	366.5	352.1	1,078.2	1,050.6
Net revenue	302.3	299.5	893.8	878.6
SC&E
Total revenues:
Total revenue	644.4	642.8	1,838.4	1,803.6
Net revenue	368.1	371.3	1,061.8	1,071.1
SC&E | United States
Total revenues:
Total revenue	463.3	479.6	1,311.3	1,308.7
Net revenue	264.9	266.5	755.4	759.5
SC&E | International
Total revenues:
Total revenue	181.1	163.2	527.1	494.9
Net revenue	$ 103.2	$ 104.8	$ 306.4	$ 311.6