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Derivatives - Summary of Fair Value Amounts of Company's Derivative Instruments (Detail) - Derivatives Designated as Hedging Instruments [Member] - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
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Derivatives, Fair Value [Line Items] |  |
Total net derivative liability designated as hedging instruments | $ (20.5) | $ (5.9)
Forward Exchange Contracts [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative asset |  | 1.1
Derivative liability | (6.5) | (1.3)
Interest Rate Hedge [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative asset |  | 0.8
Derivative liability | $ (14.0) | $ (6.5)

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