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Accumulated Other Comprehensive Income (Loss) - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Equity [Abstract]        
Other comprehensive income (loss) before reclassifications $ (118) $ (32) $ (80) $ (219)
Changes in derivative financial instruments, net of tax (14) 2 (7) 1
Changes in derivative financial instruments, tax $ 4 $ 0 $ 2 $ 0