Name:	lx_AppropriationOfNetIncomeToGeneralReserveFundRequiredPercentage
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Data Type:	dtr-types:percentItemType
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Period Type:	duration

Represents the minimum percentage of net income from required to be appropriated towards the statutory surplus fund for entities incorporated in the People's Republic of China until the reserve balance reaches 50 percent of registered capital.

No definition available.

Name:	lx_AppropriationOfNetIncomeToStatutorySurplusFundRequiredPercentage
Namespace Prefix:	lx_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

Represents the level of the general reserve fund balance as a percentage of registered capital for entities incorporated in the People's Republic of China which must be attained before mandatory transfers to the reserve are no longer required.

No definition available.

Name:	lx_GeneralReserveLevelThresholdForMandatoryTransferPercentage
Namespace Prefix:	lx_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

Represents the level of the statutory surplus fund balance as a percentage of registered capital for entities incorporated in the People's Republic of China which must be attained before mandatory transfers to the reserve are no longer required.

No definition available.

Name:	lx_StatutoryReserveLevelThresholdForMandatoryTransferPercentage
Namespace Prefix:	lx_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

Name:	lx_StatutoryReservesAndRestrictedNetAssetsAbstract
Namespace Prefix:	lx_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Amount of restricted net assets of consolidated and unconsolidated subsidiaries as of the end of the most recently completed fiscal year.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(e)(3)(ii))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

Name:	us-gaap_AmountOfRestrictedNetAssetsForConsolidatedAndUnconsolidatedSubsidiaries
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The percent of net assets of the aggregate value of all restricted investments.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-12.6(c))
-URI http://asc.fasb.org/extlink&oid=122147990&loc=d3e611133-123010

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-12B(Footnote 11(c)))
-URI http://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010