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PRINCIPAL ACCOUNTING POLICIES - Installment credit and Nonrecourse securitization debt (Details) - CNY (¥) ¥ in Millions	Dec. 31, 2022	Dec. 31, 2021
PRINCIPAL ACCOUNTING POLICIES
Collateralized receivable related to financial services	¥ 100	¥ 1,000
Non-collateralized receivable related to financial services	3,500	2,900
Financing receivables, allowance for credit losses	¥ 196	¥ 209

X

- Definition

The amount of collateralized receivables related to financial services.

+ References

No definition available.

+ Details

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Namespace Prefix:	tcom_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The amount of non-collateralized receivables related to financial services.

+ References

No definition available.

+ Details

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Namespace Prefix:	tcom_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

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

X

- Definition

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
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+ Details

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Balance Type:	credit
Period Type:	instant