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Movement in Allowance for credit losses (Detail)
¥ in Millions, $ in Millions
12 Months Ended
Dec. 31, 2023
CNY (¥)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
CNY (¥)
Dec. 31, 2021
CNY (¥)
Allowance for credit losses        
Balance as of January 1 ¥ 2,554 $ 360 ¥ 2,069 ¥ 1,320
Amounts charged to expenses 669 94 555 830
Amounts written off (47) (7) (70) (81)
Balance as of December 31 ¥ 3,176 $ 447 ¥ 2,554 ¥ 2,069