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Business acquisition - Schedule of allocation of the purchase price as of the date of CNLP acquisition (Details)
¥ in Millions, $ in Millions
Dec. 31, 2023
CNY (¥)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
CNY (¥)
Mar. 01, 2022
CNY (¥)
Dec. 31, 2021
CNY (¥)
Details of allocation of the purchase price as of the date of acquisition is summarized as follows [Line Items]          
Goodwill ¥ 19,980 $ 2,814 ¥ 23,123   ¥ 12,433
CNLP [Member]          
Details of allocation of the purchase price as of the date of acquisition is summarized as follows [Line Items]          
Net assets acquired       ¥ 4,309  
Appreciation of property, equipment and software, construction in progress and land-use rights       10,908  
Goodwill       1,586  
Deferred tax liabilities       (2,679)  
Non-controlling interests       (2,293)  
Total       ¥ 11,831