Goodwill and Other Identifiable Intangible Assets - Detail of Identifiable Intangible Assets (Detail) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Acquired Intangible Assets By Major Class [Line Items]
Cost	$ 1,241.0	$ 1,248.4
Accumulated amortization	(439.2)	(431.0)
Net	801.8	817.4
Cost	1,495.3	1,504.3
Net	1,056.1	1,073.3
Trade names intangibles
Acquired Intangible Assets By Major Class [Line Items]
Net, indefinite-life intangibles	254.3	255.9
Customer relationships
Acquired Intangible Assets By Major Class [Line Items]
Cost	1,158.7	1,166.0
Accumulated amortization	(396.0)	(389.4)
Net	762.7	776.6
Proprietary technology and patents
Acquired Intangible Assets By Major Class [Line Items]
Cost	82.3	82.4
Accumulated amortization	(43.2)	(41.6)
Net	$ 39.1	$ 40.8