Name:	us-gaap_RestrictionsForConsolidatedAndUnconsolidatedSubsidiariesAbstract
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Amount of accumulated undistributed earnings (deficit) not available for dividend distribution. Includes, but is not limited to, retained earnings appropriated for specific business purpose.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
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-Paragraph 1
-Subparagraph (SX 210.4-08(e)(1))
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-Topic 210
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-Name Accounting Standards Codification
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
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Represents net income appropriated towards statutory reserve 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:	zto_AppropriationOfNetIncomeToStatutoryReserve
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Data Type:	xbrli:monetaryItemType
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Represents the minimum percentage of net income from required to be appropriated towards the statutory reserve 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:	zto_AppropriationOfNetIncomeToStatutoryReserveRequiredPercentage
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Represents the level of the statutory 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.