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Components of Income Tax (Detail) ¥ in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2023 CNY (¥) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 CNY (¥) | Dec. 31, 2021 CNY (¥)
Income Tax Disclosure [Abstract] |  |  |  |
Current income tax | ¥ 3,812 | $ 537 | ¥ 3,163 | ¥ 3,636
Income tax refund due to reduced tax rate |  |  | (468) | 0
Adjustments of deferred tax assets due to change in tax rates | 111 | 16 | 119 | 109
Deferred income tax benefit | (274) | (39) | (236) | (558)
Taxation for the year | ¥ 3,649 | $ 514 | ¥ 2,578 | ¥ 3,187

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