Goodwill (Details) - USD ($) $ in Millions			12 Months Ended
	Jan. 01, 2024	Jan. 01, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Aug. 31, 2024
Goodwill
Goodwill	$ 5,080.9	$ 5,050.6	$ 4,689.4	$ 5,080.9	$ 5,050.6
Goodwill, Impairment Loss			232.1	0.0	0.0
Goodwill, Acquired/(Disposed) During Period			(117.6)	3.1
Goodwill, Transfers	0.0	0.0
Current year acquisitions/(dispositions)				11.7
Foreign currency and other			(41.8)	27.2
Disposal Group, Including Discontinued Operation, Goodwill			78.9
Goodwill, Impairment Loss			232.1	0.0	0.0
Disposal Group, Including Discontinued Operation, Goodwill			78.9
Goodwill, Impaired, Accumulated Impairment Loss			207.2
Minimum [Member]
Goodwill
Goodwill Test, Discount Rate						14.50%
Measurement Input, Terminal Revenue Growth Rate						2.50%
Maximum [Member]
Goodwill
Goodwill Test, Discount Rate						22.00%
Measurement Input, Terminal Revenue Growth Rate						3.00%
Corporate Segment and Other Operating Segment
Goodwill
EBITA			(132.8)	(72.3)	(94.5)
MD&E
Goodwill
Goodwill	2,690.8	2,668.2	2,332.8	2,677.5	2,487.6
Goodwill, Impairment Loss			232.1
Goodwill, Acquired/(Disposed) During Period			(116.5)	2.2
Goodwill, Transfers	13.3	180.6
Foreign currency and other			(9.4)	7.1
Disposal Group, Including Discontinued Operation, Goodwill			24.9
EBITA			847.9	836.9	748.4
Goodwill, Impairment Loss			232.1
Disposal Group, Including Discontinued Operation, Goodwill			24.9
IA&C
Goodwill
Goodwill	1,709.9	1,698.0	1,681.8	1,723.2	1,878.6
Goodwill, Impairment Loss			0.0
Goodwill, Acquired/(Disposed) During Period			(1.2)	10.7
Goodwill, Transfers	(13.3)	(180.6)
Foreign currency and other			(26.9)	14.5
EBITA			542.6	536.8	577.5
Goodwill, Impairment Loss			0.0
SC&E
Goodwill
Goodwill	680.2	684.4	674.8	680.2	684.4
Goodwill, Impairment Loss			0.0
Goodwill, Acquired/(Disposed) During Period			0.1	(9.8)
Goodwill, Transfers	$ 0.0	$ 0.0
Foreign currency and other			(5.5)	5.6
EBITA			259.4	$ 265.2	$ 234.5
Goodwill, Impairment Loss			$ 0.0