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SHARE-BASED COMPENSATION - Recognized share-based compensation expenses (Details) - CNY (¥) ¥ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Recognized share-based compensation expenses	¥ 87	¥ 109	¥ 122
Hotel operating costs
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Recognized share-based compensation expenses	33	39	42
Selling and marketing expenses
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Recognized share-based compensation expenses	4	4	4
General and administrative expenses
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Recognized share-based compensation expenses	¥ 50	¥ 66	¥ 76

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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- Definition

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+ References

No definition available.

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