Segment Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Segments:
Total revenue	$ 2,710.0	$ 2,666.5	$ 5,205.9	$ 5,187.5
Net revenue	2,327.1	2,328.5	4,510.0	4,505.4
Segment EBITA	338.6	331.9	543.5	541.1
Amortization of acquired intangibles	(20.4)	(21.2)	(41.1)	(42.1)
Depreciation	44.6	45.3	89.1	90.9
Capital expenditures	34.8	46.4	69.9	79.3
Total assets	17,011.8		17,011.8		$ 19,267.3
Operating income	318.2	310.7	502.4	499.0
Total (expenses) and other income	(22.5)	(32.1)	(46.1)	(54.4)
Income before income taxes	295.7	278.6	456.3	444.6
Restructuring charges	0.3	(1.7)	0.9	(0.1)
MD&E
Segments:
Total revenue	1,075.4	1,075.8	2,048.7	2,062.7
Net revenue	1,063.5	1,060.9	2,024.8	2,026.8
Segment EBITA	181.4	144.6	274.6	224.4
Amortization of acquired intangibles	19.2	19.3	38.4	38.7
Depreciation	26.8	27.0	53.3	53.3
Capital expenditures	17.5	30.8	39.0	53.2
Total assets	9,613.4		9,613.4		10,737.5
Restructuring charges	0.3	(1.2)	0.3	(1.2)
Lease impairment costs	0.2	(1.2)	0.2	(1.3)
IA&C
Segments:
Total revenue	999.4	1,005.0	1,963.2	1,964.0
Net revenue	910.1	908.3	1,791.5	1,778.8
Segment EBITA	132.7	131.0	240.6	229.1
Amortization of acquired intangibles	0.8	1.3	1.8	2.2
Depreciation	12.8	13.2	25.2	27.3
Capital expenditures	6.5	7.1	8.9	8.9
Total assets	4,676.5		4,676.5		4,790.4
Restructuring charges	0.0	0.0	0.3	0.3
Lease impairment costs		(0.2)	0.3	(0.2)
SC&E
Segments:
Total revenue	635.2	585.7	1,194.0	1,160.8
Net revenue	353.5	359.3	693.7	699.8
Segment EBITA	53.5	71.3	97.4	116.5
Amortization of acquired intangibles	0.4	0.6	0.9	1.2
Depreciation	3.6	3.9	7.1	8.1
Capital expenditures	2.0	1.5	2.8	2.0
Total assets	1,685.4		1,685.4		1,800.6
Restructuring charges	0.0	(0.4)	0.3	0.9
Lease impairment costs		(1.0)	0.3	0.3
Corporate and Other
Segments:
Segment EBITA	(29.0)	(15.0)	(69.1)	(28.9)
Amortization of acquired intangibles	0.0	0.0	0.0	0.0
Depreciation	1.4	1.2	3.5	2.2
Capital expenditures	8.8	7.0	19.2	15.2
Total assets	1,036.5		1,036.5		$ 1,938.8
Restructuring charges	$ 0.0	$ (0.1)	$ 0.0	$ (0.1)