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Summary of Effects of Interest Rate Swap Agreements and Foreign Currency Foreign Exchange Contracts on Result of Operations (Parenthetical) (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Designated As Hedging Instrument | Interest Expense, Net | Cash Flow Hedging | Interest Rate Swap |  |
Derivative Instruments Gain Loss [Line Items] |  |
Gain reclassified out of AOCI into interest expenses | $ 3.4 | $ 6.7

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