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REVENUE - Contract Balances (Details)
¥ in Millions, $ in Millions
Dec. 31, 2023
CNY (¥)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
CNY (¥)
Contract with Customer, Liability      
Current contract liabilities ¥ 1,637 $ 231 ¥ 1,308
Long-term contract liabilities 1,072 $ 151 828
Total contract liabilities ¥ 2,709   ¥ 2,136