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Goodwill and Intangible Assets - Schedule of Other Intangible Asset Net (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 566.2 | $ 542.6
Accumulated Amortization | (371.2) | (364.7)
Net | 195.0 | 177.9
Trade Name [Member] |  |
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 177.7 | 174.0
Accumulated Amortization | (2.5) | (2.1)
Net | $ 175.2 | $ 171.9
Minimum [Member] | Trade Name [Member] |  |
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items] |  |
Estimated Life Range (Years) | 3 years | 3 years
Maximum [Member] | Trade Name [Member] |  |
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items] |  |
Estimated Life Range (Years) | 5 years |
Estimated Life Range (Years) | Indefinite | Indefinite
Customer Lists and Relationships [Member] |  |
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 229.0 | $ 212.5
Accumulated Amortization | (212.1) | (208.2)
Net | $ 16.9 | $ 4.3
Customer Lists and Relationships [Member] | Minimum [Member] |  |
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items] |  |
Estimated Life Range (Years) | 5 years | 5 years
Customer Lists and Relationships [Member] | Maximum [Member] |  |
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items] |  |
Estimated Life Range (Years) | 15 years | 15 years
Technology [Member] |  |
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 159.5 | $ 156.1
Accumulated Amortization | (156.6) | (154.4)
Net | $ 2.9 | $ 1.7
Technology [Member] | Minimum [Member] |  |
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items] |  |
Estimated Life Range (Years) | 3 years | 3 years
Technology [Member] | Maximum [Member] |  |
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items] |  |
Estimated Life Range (Years) | 4 years | 4 years

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