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Derivatives - Additional Information (Detail) - Designated as Hedging Instrument [Member] - Interest Rate Swap [Member] - USD ($) $ in Millions | Sep. 30, 2020 | Dec. 31, 2019
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Derivative Instruments, Gain (Loss) [Line Items] |  |
Derivative notional amount | $ 720 |
Derivative liability | $ 39 |
Derivative asset |  | $ 1
Derivative, fixed interest rate | 1.62% |
London Interbank Offered Rate (LIBOR) [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Derivative variable interest Rate | 0.15% | 1.76%

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