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Tax Benefit (expense) Allocated to each Component of Other Comprehensive Income (loss) (Detail) ¥ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023 CNY (¥)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 CNY (¥)	Dec. 31, 2021 CNY (¥)
Other Comprehensive Income (Loss), Tax [Abstract]
Unrealized (losses) gains on available-for-sale investments	¥ (13)	$ (2)	¥ 28	¥ (3)
Net current-period other comprehensive (loss) income	¥ (13)	$ (2)	¥ 28	¥ (3)

X

- Definition

Other Comprehensive Income, Net Unrealized Gains And Losses On Securities, Tax

+ References

No definition available.

+ Details

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- Definition

Amount, before adjustment, of tax expense (benefit) for unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) and unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 12
-SubTopic 10
-Topic 220
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482790/220-10-45-12

+ Details

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- References

No definition available.

+ Details

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