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Goodwill and Identifiable Intangible Assets - Gross Carrying Value and Accumulated Amortization by Class of Identifiable Intangible Assets (Detail) - USD ($)
$ in Millions
Mar. 31, 2021
Dec. 31, 2020
Intangible Assets [Line Items]    
Gross Carrying Amounts, Indefinite-lived tradenames $ 712.2 $ 711.0
Net Book Value, Indefinite-lived tradenames 712.2 711.0
Gross Carrying Amounts, Finite Lived 1,148.4 1,117.6
Accumulated Amortization, Finite Lived (426.3) (408.3)
Net Book Value, Finite Lived 722.1 709.3
Gross Carrying Amounts, Total identifiable intangibles 1,860.6 1,828.6
Accumulated Amortization, Total identifiable intangibles (426.3) (408.3)
Net Book Value, Total identifiable intangibles 1,434.3 1,420.3
Tradenames [Member]    
Intangible Assets [Line Items]    
Gross Carrying Amounts, Finite Lived 37.3 34.8
Accumulated Amortization, Finite Lived (14.5) (14.0)
Net Book Value, Finite Lived 22.8 20.8
Customer and contractual relationships [Member]    
Intangible Assets [Line Items]    
Gross Carrying Amounts, Finite Lived 978.2 973.2
Accumulated Amortization, Finite Lived (350.1) (337.3)
Net Book Value, Finite Lived 628.1 635.9
Patents/proprietary technology [Member]    
Intangible Assets [Line Items]    
Gross Carrying Amounts, Finite Lived 132.9 109.6
Accumulated Amortization, Finite Lived (61.7) (57.0)
Net Book Value, Finite Lived $ 71.2 $ 52.6