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SUMMARY OF PRINCIPAL ACCOUNTING POLICIES - Land use rights (Details) - CNY (¥)
¥ in Millions
9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Accounting policies    
Long-lived asset impairment loss ¥ 101 ¥ 60
Impairment, Long-Lived Asset, Held-for-Use, Statement of Income or Comprehensive Income [Extensible Enumeration] Hotel Operating Cost Hotel Operating Cost
Net revenues ¥ 10,156 ¥ 9,437
Minimum | Legacy Huazhu    
Accounting policies    
Initial lease term 10 years  
Minimum | Legacy DH    
Accounting policies    
Initial lease term 20 years  
Maximum | Legacy Huazhu    
Accounting policies    
Initial lease term 20 years  
Maximum | Legacy DH    
Accounting policies    
Initial lease term 25 years