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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
Dec. 31, 2020
Dec. 31, 2019
Intangible Assets [Line Items]    
Gross Carrying Amounts, Indefinite-lived tradenames $ 711.0 $ 635.6
Net Book Value, Indefinite-lived tradenames 711.0 635.6
Gross Carrying Amounts, Finite Lived 1,117.6 897.9
Accumulated Amortization, Finite Lived (408.3) (364.6)
Net Book Value, Finite Lived 709.3 533.3
Gross Carrying Amounts, Total identifiable intangibles 1,828.6 1,533.5
Accumulated Amortization, Total identifiable intangibles (408.3) (364.6)
Net Book Value, Total identifiable intangibles 1,420.3 1,168.9
Tradenames [Member]    
Intangible Assets [Line Items]    
Gross Carrying Amounts, Finite Lived 34.8 20.6
Accumulated Amortization, Finite Lived (14.0) (12.9)
Net Book Value, Finite Lived 20.8 7.7
Customer and contractual relationships [Member]    
Intangible Assets [Line Items]    
Gross Carrying Amounts, Finite Lived 973.2 803.9
Accumulated Amortization, Finite Lived (337.3) (299.6)
Net Book Value, Finite Lived 635.9 504.3
Patents/proprietary technology [Member]    
Intangible Assets [Line Items]    
Gross Carrying Amounts, Finite Lived 109.6 73.4
Accumulated Amortization, Finite Lived (57.0) (52.1)
Net Book Value, Finite Lived $ 52.6 $ 21.3