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Goodwill and Other Intangible Assets, Net - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]        
Amortization of acquisition-related intangibles $ 200 $ 49 $ 352 $ 97