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Equity - Summary of Company Expenses Compensation Costs Based on Grant Date Fair Value (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2018
Stock Options Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total stock-based compensation expense | $ 16 | $ 30 | $ 46
Restricted Stock Units [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total stock-based compensation expense | 103 | 99 | 73
Omnibus Long Term Share Incentive Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total stock-based compensation expense | 119 | 129 | 119
Tax effect on stock-based compensation expense | 12 | 14 | 14
Net effect | $ 107 | $ 115 | $ 105

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