Goodwill and Other Identifiable Intangible Assets - Identifiable Intangible Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Acquired Intangible Assets by Major Class [Line Items]
Finite-life intangibles, cost	$ 1,248.4	$ 1,235.3
Accumulated amortization	(431.0)	(448.6)
Finite-life intangibles, net	817.4	786.7
Indefinite-life intangibles	255.9	247.1
Total intangibles, cost	1,504.3	1,482.4
Total intangibles, net	1,073.3	1,033.8
Customer relationships
Acquired Intangible Assets by Major Class [Line Items]
Finite-life intangibles, cost	1,166.0	1,146.5
Accumulated amortization	(389.4)	(400.2)
Finite-life intangibles, net	776.6	746.3
Proprietary technology and patents
Acquired Intangible Assets by Major Class [Line Items]
Finite-life intangibles, cost	82.4	88.8
Accumulated amortization	(41.6)	(48.4)
Finite-life intangibles, net	$ 40.8	$ 40.4