XML 86 R69.htm IDEA: XBRL DOCUMENT v3.21.1
REVENUE FROM CONTRACT WITH CUSTOMERS - Contract Balances - Unsatisfied performance obligations (Details) - CNY (¥)
¥ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Deferred revenues related to unsatisfied performance obligations of loyalty program ¥ 51 ¥ 57
Deferred revenue related to initial fees 924 869
Deferred revenue related to membership fees 430 400
Deferred revenues related to advances received from customers, expected to recognize revenue in future periods ¥ 529 ¥ 412
Minimum    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Remaining contract period 1 year  
Remaining membership life 1 year  
Maximum    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Remaining contract period 10 years  
Remaining membership life 5 years  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Deferred revenues related to unsatisfied performance obligations of loyalty program ¥ 51  
Deferred revenue, recognized as revenue, estimated period 2 years