Goodwill and Other Intangible Assets - Schedule of Identifiable Intangible Assets (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 646.4	$ 660.6
Accumulated Amortization	268.8	265.1
Total	717.2	732.0
Trademarks
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived:	70.8	71.4
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	460.2	470.1
Accumulated Amortization	169.0	166.2
Existing technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	114.0	117.5
Accumulated Amortization	51.5	50.8
Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	38.9	39.4
Accumulated Amortization	24.1	24.1
Other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	33.3	33.6
Accumulated Amortization	$ 24.2	$ 24.0