Taxation - Components of Tax Expense (Detail) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Major components of tax expense (income) [abstract] | ||
| Current tax expense | $ 945 | $ 302 |
| Deferred tax expense (benefit) | 662 | (231) |
| Total tax expense | $ 1,607 | $ 71 |