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Other comprehensive income (Details) ¥ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2022 CNY (¥)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 CNY (¥)	Dec. 31, 2020 CNY (¥)
Composition of accumulated other comprehensive income/(loss)
Balance	¥ 245,572		¥ 204,486	¥ 84,660
Balance	273,533	$ 39,659	245,572	204,486
Foreign currency translation adjustments
Composition of accumulated other comprehensive income/(loss)
Balance	(6,090)		(3,548)	4,108
Other comprehensive income/(loss)	5,131		(2,542)	(7,656)
Balance	(959)		(6,090)	(3,548)
Net unrealized gains/(losses) on available-for-sale securities
Composition of accumulated other comprehensive income/(loss)
Balance				55
Other comprehensive income/(loss)				(55)
Accumulated other comprehensive income/(loss)
Composition of accumulated other comprehensive income/(loss)
Balance	(6,090)		(3,548)	4,163
Other comprehensive income/(loss)	5,131		(2,542)	(7,711)
Balance	¥ (959)		¥ (6,090)	¥ (3,548)

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Amount after tax of other comprehensive income (loss) attributable to parent entity.

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Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.

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