Earnings per share - Summary of Computation of Basic and Diluted Net Income Per Share (Details) - CNY (¥) ¥ / shares in Units, ¥ in Millions	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Earnings
Net profit attributable to equity holders of the Company	¥ 3,677	¥ 3,029	¥ 4,155
Shares
Weighted average ordinary shares outstanding, used in computing basic earnings per share	3,203,995,973	3,321,067,177	3,313,527,847
Dilution effect- adjustments for share options and RSUs	30,511,383	41,978,580	46,932,912
Shares used in computing diluted earnings per share	3,234,507,356	3,363,045,757	3,360,460,759
Class A And Class B Ordinary Shares [Member]
Basic earnings per share calculation
Basic	¥ 1.15	¥ 0.91	¥ 1.25
Diluted earnings per share calculation
Diluted	1.14	0.90	1.24
American Depositary Shares [Member]
Basic earnings per share calculation
Basic	2.30	1.82	2.51
Diluted earnings per share calculation
Diluted	¥ 2.27	¥ 1.80	¥ 2.47

The weighted average number of ordinary shares outstanding plus the weighted average number of ordinary shares that would be issued on the conversion of all the dilutive potential ordinary shares into ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

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The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator) divided by the weighted average number of ordinary shares outstanding during the period (the denominator).

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The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator), divided by the weighted average number of ordinary shares outstanding during the period (the denominator), both adjusted for the effects of all dilutive potential ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

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The profit (loss) from continuing and discontinued operations attributable to owners of the parent. [Refer: Profit (loss)]

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The number of ordinary shares outstanding at the beginning of the period, adjusted by the number of ordinary shares bought back or issued during the period multiplied by a time-weighting factor.

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