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Fair value measurement (Details 2) - CNY (¥) ¥ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Short-term investments
Gain (loss) from changes in fair value option	¥ 2,092	¥ 1,921
Investment, Type [Extensible Enumeration]	Wealth Management Product [Member]	Wealth Management Product [Member]

X

- Definition

For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings.

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- Definition

Indicates type of investment. Includes, but is not limited to, common stock, preferred stock, convertible security, fixed income security, government security, option purchased, warrant, loan participation and assignment, commercial paper, bankers' acceptance, certificates of deposit, short-term security, repurchase agreement, and other investment company.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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