Segment Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Segments:
Total revenue	$ 2,628,800,000	$ 2,678,500,000	$ 7,834,700,000	$ 7,866,000,000
Net revenue	2,242,700,000	2,309,000,000	6,752,700,000	6,814,400,000
Segment EBITA	385,300,000	397,800,000	928,800,000	938,900,000
Amortization of acquired intangibles	(20,300,000)	(21,000,000.0)	(61,400,000)	(63,100,000)
Goodwill, Impairment Loss	232,100,000	0	232,100,000	0
Depreciation	45,000,000.0	45,000,000.0	134,100,000	135,900,000
Capital expenditures	37,300,000	47,800,000	107,200,000	127,100,000
Total assets	17,083,200,000		17,083,200,000		$ 19,267,300,000
Operating income	132,900,000	376,800,000	635,300,000	875,800,000
Total (expenses) and other income	(23,400,000)	(37,300,000)	(69,500,000)	(91,700,000)
Income before income taxes	109,500,000	339,500,000	565,800,000	784,100,000
Restructuring charges	500,000	(600,000)	1,400,000	(700,000)
MD&E
Segments:
Total revenue	1,043,800,000	1,075,100,000	3,092,500,000	3,137,800,000
Net revenue	1,025,700,000	1,060,000,000	3,050,500,000	3,086,800,000
Segment EBITA	194,900,000	209,100,000	469,500,000	433,500,000
Amortization of acquired intangibles	19,200,000	19,400,000	57,600,000	58,100,000
Goodwill, Impairment Loss	232,100,000	0	232,100,000	0
Depreciation	27,500,000	26,500,000	80,800,000	79,800,000
Capital expenditures	18,200,000	21,900,000	57,200,000	75,100,000
Total assets	9,702,300,000		9,702,300,000		10,737,500,000
Restructuring charges	500,000	(100,000)	800,000	(1,300,000)
Lease impairment costs	400,000	(100,000)	600,000	(1,300,000)
IA&C
Segments:
Total revenue	940,600,000	960,600,000	2,903,800,000	2,924,600,000
Net revenue	848,900,000	877,700,000	2,640,400,000	2,656,500,000
Segment EBITA	134,000,000.0	129,300,000	374,600,000	358,400,000
Amortization of acquired intangibles	800,000	1,000,000.0	2,600,000	3,200,000
Goodwill, Impairment Loss			0
Depreciation	12,800,000	13,300,000	38,000,000.0	40,600,000
Capital expenditures	7,600,000	14,600,000	16,500,000	23,500,000
Total assets	4,668,300,000		4,668,300,000		4,790,400,000
Restructuring charges	0	(500,000)	300,000	(200,000)
Lease impairment costs		(600,000)	300,000	(800,000)
SC&E
Segments:
Total revenue	644,400,000	642,800,000	1,838,400,000	1,803,600,000
Net revenue	368,100,000	371,300,000	1,061,800,000	1,071,100,000
Segment EBITA	78,500,000	77,700,000	175,900,000	194,200,000
Amortization of acquired intangibles	300,000	600,000	1,200,000	1,800,000
Goodwill, Impairment Loss			0
Depreciation	3,400,000	4,000,000.0	10,500,000	12,100,000
Capital expenditures	5,400,000	1,800,000	8,200,000	3,800,000
Total assets	1,777,400,000		1,777,400,000		1,800,600,000
Restructuring charges	0	(200,000)	300,000	700,000
Lease impairment costs		(200,000)	300,000
Corporate and Other
Segments:
Segment EBITA	(22,100,000)	(18,300,000)	(91,200,000)	(47,200,000)
Amortization of acquired intangibles	0.0	0.0	0.0	0.0
Depreciation	1,300,000	1,200,000	4,800,000	3,400,000
Capital expenditures	6,100,000	9,500,000	25,300,000	24,700,000
Total assets	935,200,000		935,200,000		$ 1,938,800,000
Restructuring charges	$ 0	$ 200,000	$ 0	$ 100,000