Segment Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Segments:
Total revenue	$ 2,568.5	$ 2,257.0
Net revenue	2,227.2	2,027.7
Segment EBITA	267.0	264.6
Amortization of acquired intangibles	(21.3)	(21.6)
Depreciation	46.5	47.6
Capital expenditures	30.7	28.3
Total assets	17,880.9		$ 19,909.2
Operating income	245.7	243.0
Total (expenses) and other income	(35.8)	(126.6)
Income before income taxes	209.9	116.4
MD&E
Segments:
Total revenue	955.8	871.5
Net revenue	932.1	849.8
Segment EBITA	101.4	135.8
Amortization of acquired intangibles	17.9	18.0
Depreciation	26.2	24.6
Capital expenditures	16.0	13.0
Total assets	8,661.7		9,580.6
IA&C
Segments:
Total revenue	1,054.2	953.9
Net revenue	958.8	875.7
Segment EBITA	130.5	118.1
Amortization of acquired intangibles	2.4	2.6
Depreciation	14.7	16.5
Capital expenditures	6.0	8.7
Total assets	5,777.9		6,004.2
SC&E
Segments:
Total revenue	558.5	431.6
Net revenue	336.3	302.2
Segment EBITA	56.0	40.8
Amortization of acquired intangibles	1.0	1.0
Depreciation	4.1	4.6
Capital expenditures	0.8	0.7
Total assets	1,632.0		1,590.9
Corporate and Other
Segments:
Segment EBITA	(20.9)	(30.1)
Amortization of acquired intangibles	0.0	0.0
Depreciation	1.5	1.9
Capital expenditures	7.9	$ 5.9
Total assets	$ 1,809.3		$ 2,733.5