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Goodwill and Intangible Assets - Schedule of Other Intangible Asset (Detail) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2021 | Dec. 31, 2020
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 684.9 | $ 566.2
Accumulated Amortization | (373.7) | (371.2)
Net | 311.2 | 195.0
Trade Name [Member] |  |
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 184.8 | 177.7
Accumulated Amortization | (2.7) | (2.5)
Net | $ 182.1 | $ 175.2
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 | 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 | $ 296.0 | $ 229.0
Accumulated Amortization | (213.4) | (212.1)
Net | $ 82.6 | $ 16.9
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 | $ 204.1 | $ 159.5
Accumulated Amortization | (157.6) | (156.6)
Net | $ 46.5 | $ 2.9
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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