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Loan facilities and lines of credit (Details 2)
¥ in Millions, $ in Millions
Dec. 31, 2022
CNY (¥)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
CNY (¥)
Debt Instrument [Line Items]      
Unsecured senior notes ¥ 10,224 $ 1,482 ¥ 9,386
Total Loan Facilities 42,379    
Unsecured Senior Notes [Member]      
Debt Instrument [Line Items]      
Unsecured senior notes 10,224    
Unsecured Borrowings [Member]      
Debt Instrument [Line Items]      
Unsecured borrowings 24,327    
Secured Borrowings [Member]      
Debt Instrument [Line Items]      
Secured borrowings ¥ 7,828