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Summary of Effects of Interest Rate Swap Agreements and Foreign Currency Foreign Exchange Contracts on Result of Operations (Parenthetical) (Detail) - Designated As Hedging Instrument - USD ($) | 3 Months Ended | 9 Months Ended
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Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
UK | Net Investment Hedge | Foreign Currency Foreign Exchange Contracts |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Loss recorded on repatriation of cash related to investment | $ 1,100,000 |  | $ 5,700,000 |
Interest Expense, Net | Cash Flow Hedging | Interest Rate Swap |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Gain reclassified out of AOCI into other (income) expenses | 0 | $ 2,000,000.0 | 3,400,000 | $ 4,200,000
Other (Income) Expense, Net | Net Investment Hedge | Foreign Currency Foreign Exchange Contracts |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Gain reclassified out of AOCI into other (income) expenses | $ 1,100,000 | $ 0 | $ 5,700,000 | $ 0

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