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GEOGRAPHIC INFORMATION - Revenue from external customers by geographic areas (Details) ¥ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2022 CNY (¥)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 CNY (¥)	Dec. 31, 2020 CNY (¥)
Geographic Areas, Revenues from External Customers [Abstract]
Total Revenue	¥ 20,055	$ 2,909	¥ 20,029	¥ 18,327
The Greater China
Geographic Areas, Revenues from External Customers [Abstract]
Total Revenue	16,326		18,423	17,019
Others
Geographic Areas, Revenues from External Customers [Abstract]
Total Revenue	¥ 3,729		¥ 1,606	¥ 1,308

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Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

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