Revenue Major Geographical Area (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Total revenues:
Total revenue	$ 2,678.5	$ 2,637.7	$ 7,866.0	$ 7,941.9
Net revenue	2,309.0	2,296.2	6,814.4	6,898.9
United States
Total revenues:
Total revenue	1,759.7	1,744.3	5,180.1	5,171.8
Net revenue	1,509.9	1,523.0	4,512.3	4,548.0
United Kingdom
Total revenues:
Total revenue	215.5	195.5	627.6	646.8
Net revenue	193.0	176.5	548.1	543.7
Continental Europe
Total revenues:
Total revenue	204.5	184.4	612.9	610.2
Net revenue	178.3	160.1	534.5	539.2
Asia Pacific
Total revenues:
Total revenue	203.8	219.8	607.4	652.9
Net revenue	175.3	187.1	511.8	549.5
Latin America
Total revenues:
Total revenue	120.0	113.6	321.1	318.0
Net revenue	114.8	107.4	301.9	297.0
Other
Total revenues:
Total revenue	175.0	180.1	516.9	542.2
Net revenue	137.7	142.1	405.8	421.5
International
Total revenues:
Total revenue	918.8	893.4	2,685.9	2,770.1
Net revenue	799.1	773.2	2,302.1	2,350.9
MD&E
Total revenues:
Total revenue	1,069.3	1,040.7	3,121.3	3,126.5
Net revenue	1,054.4	1,024.2	3,070.7	3,063.2
MD&E | United States
Total revenues:
Total revenue	669.9	659.5	1,992.7	1,975.8
Net revenue	663.5	652.0	1,970.2	1,943.6
MD&E | International
Total revenues:
Total revenue	399.4	381.2	1,128.6	1,150.7
Net revenue	390.9	372.2	1,100.5	1,119.6
IA&C
Total revenues:
Total revenue	966.4	1,011.4	2,941.1	3,079.8
Net revenue	883.3	927.1	2,672.6	2,805.8
IA&C | United States
Total revenues:
Total revenue	610.2	643.6	1,878.7	1,947.2
Net revenue	579.9	620.0	1,782.6	1,870.8
IA&C | International
Total revenues:
Total revenue	356.2	367.8	1,062.4	1,132.6
Net revenue	303.4	307.1	890.0	935.0
SC&E
Total revenues:
Total revenue	642.8	585.6	1,803.6	1,735.6
Net revenue	371.3	344.9	1,071.1	1,029.9
SC&E | United States
Total revenues:
Total revenue	479.6	441.2	1,308.7	1,248.8
Net revenue	266.5	251.0	759.5	733.6
SC&E | International
Total revenues:
Total revenue	163.2	144.4	494.9	486.8
Net revenue	$ 104.8	$ 93.9	$ 311.6	$ 296.3