Segment Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Segments:
Total revenue	$ 2,521.0	$ 2,568.5
Net revenue	2,176.9	2,227.2
Segment EBITA	209.2	267.0
Amortization of acquired intangibles	(20.9)	(21.3)
Depreciation	45.6	46.5
Capital expenditures	32.9	30.7
Total assets	16,664.1		$ 18,845.0
Operating income	188.3	245.7
Total (expenses) and other income	(22.3)	(35.8)
Income before income taxes	166.0	209.9
Restructuring charges	1.6	6.6
Lease impairment costs	1.2	5.3
MD&E
Segments:
Total revenue	981.8	996.8
Net revenue	960.8	973.7
Segment EBITA	79.1	111.8
Amortization of acquired intangibles	19.4	17.9
Depreciation	26.3	26.4
Capital expenditures	22.4	16.0
Total assets	9,018.8		9,984.3
Restructuring charges	0.0	(0.1)
IA&C
Segments:
Total revenue	964.1	1,012.6
Net revenue	875.6	916.9
Segment EBITA	98.8	120.0
Amortization of acquired intangibles	0.9	2.4
Depreciation	14.1	14.5
Capital expenditures	1.8	6.0
Total assets	4,884.6		5,083.5
Restructuring charges	0.3	6.2
Lease impairment costs		5.1
SC&E
Segments:
Total revenue	575.1	559.1
Net revenue	340.5	336.6
Segment EBITA	45.2	56.1
Amortization of acquired intangibles	0.6	1.0
Depreciation	4.2	4.1
Capital expenditures	0.5	0.8
Total assets	1,615.5		1,629.9
Restructuring charges	1.3	0.4
Lease impairment costs	1.2	0.2
Corporate and Other
Segments:
Segment EBITA	(13.9)	(20.9)
Amortization of acquired intangibles	0.0	0.0
Depreciation	1.0	1.5
Capital expenditures	8.2	7.9
Total assets	1,145.2		$ 2,147.3
Restructuring charges	$ 0.0	$ 0.1