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SUMMARY OF PRINCIPAL ACCOUNTING POLICIES - Land use rights (Details)
¥ in Millions
12 Months Ended
Dec. 31, 2022
CNY (¥)
item
Dec. 31, 2021
CNY (¥)
Dec. 31, 2020
CNY (¥)
Accounting policies      
Long-lived asset impairment loss ¥ 297 ¥ 157 ¥ 180
Impairment Long Lived Asset Held For Use Statement Of Income Or Comprehensive Income Extensible Enumeration Not Disclosed Flag true    
Number of reporting units | item 2    
Net revenues ¥ 13,862 12,785 10,196
Advertising related expenses 128 165 150
Loyalty program      
Accounting policies      
Net revenues ¥ 267 ¥ 243 ¥ 223
Minimum      
Accounting policies      
Estimated membership duration 2 years    
Minimum | Legacy Huazhu      
Accounting policies      
Initial lease term 10 years    
Minimum | Legacy DH      
Accounting policies      
Initial lease term 20 years    
Minimum | Land use rights      
Accounting policies      
Remaining contractual term 30 years    
Maximum      
Accounting policies      
Estimated membership duration 5 years    
Maximum | Legacy Huazhu      
Accounting policies      
Initial lease term 20 years    
Maximum | Legacy DH      
Accounting policies      
Initial lease term 25 years    
Maximum | Land use rights      
Accounting policies      
Remaining contractual term 50 years