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Goodwill and Intangible Assets, Net - Summary Of Operating Segments Presenting Impairment Charges Or Relative Impairment Risk (Detail) - Operating segments [member] - United States [member] $ in Millions | 12 Months Ended
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Dec. 31, 2020 USD ($)
Disclosure Of Operating Segments Presenting Impairment Charges Or Relative Impairment Risk [Line Items] |
Impairment losses recognized | $ 1,020
Discount rate +1% | $ 188

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