Goodwill and Other Intangible Assets - Schedule of Identifiable Intangible Assets (Detail) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets
Gross Carrying Amount	$ 652.1	$ 660.6
Accumulated Amortization	278.4	265.1
Total	721.1	732.0
Trademarks
Indefinite-lived Intangible Assets
Indefinite-Lived:	69.0	71.4
Customer relationships
Finite-Lived Intangible Assets
Gross Carrying Amount	466.3	470.1
Accumulated Amortization	176.0	166.2
Existing technology
Finite-Lived Intangible Assets
Gross Carrying Amount	113.1	117.5
Accumulated Amortization	51.7	50.8
Trademarks
Finite-Lived Intangible Assets
Gross Carrying Amount	39.5	39.4
Accumulated Amortization	26.4	24.1
Other
Finite-Lived Intangible Assets
Gross Carrying Amount	33.2	33.6
Accumulated Amortization	$ 24.3	$ 24.0

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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-Name Accounting Standards Codification
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