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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
Jun. 30, 2020
Dec. 31, 2019
Intangible Assets [Line Items]    
Gross Carrying Amounts, Indefinite-lived tradenames $ 596.2 $ 635.6
Net Book Value, Indefinite-lived tradenames 596.2 635.6
Gross Carrying Amounts, Finite Lived 905.0 897.9
Accumulated Amortization, Finite Lived (383.2) (364.6)
Net Book Value, Finite Lived 521.8 533.3
Gross Carrying Amounts, Total identifiable intangibles 1,501.2 1,533.5
Accumulated Amortization, Total identifiable intangibles (383.2) (364.6)
Net Book Value, Total identifiable intangibles 1,118.0 1,168.9
Tradenames [Member]    
Intangible Assets [Line Items]    
Gross Carrying Amounts, Finite Lived 32.7 20.6
Accumulated Amortization, Finite Lived (13.0) (12.9)
Net Book Value, Finite Lived 19.7 7.7
Customer and contractual relationships [Member]    
Intangible Assets [Line Items]    
Gross Carrying Amounts, Finite Lived 797.3 803.9
Accumulated Amortization, Finite Lived (315.0) (299.6)
Net Book Value, Finite Lived 482.3 504.3
Patents/proprietary technology [Member]    
Intangible Assets [Line Items]    
Gross Carrying Amounts, Finite Lived 75.0 73.4
Accumulated Amortization, Finite Lived (55.2) (52.1)
Net Book Value, Finite Lived $ 19.8 $ 21.3