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SUMMARY OF PRINCIPAL ACCOUNTING POLICIES - Variable Interest Entities (Details) - item	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
VIEs
Variable Interest Entities
Number of entities consolidated	8	8

X

- Definition

The number of entities included in consolidation.

+ References

No definition available.

+ Details

Name:	htht_NumberOfEntitiesIncludedInConsolidation
Namespace Prefix:	htht_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_VariableInterestEntityLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_ConsolidatedEntitiesAxis=us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: