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EMPLOYEE BENEFITS (Details) - CNY (¥) ¥ in Billions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
EMPLOYEE BENEFITS
Expense of employee benefits	¥ 1.9	¥ 1.8	¥ 1.4

X

- Definition

The amount of expense related to employee benefits during the period.

+ References

No definition available.

+ Details

Name:	tcom_ExpenseOfEmployeeBenefits
Namespace Prefix:	tcom_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

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