Name:	ntes_IncomeTaxHolidayEffectsOfTaxHolidaysAbstract
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The diluted per share effect of the aggregate amount of the income tax benefit resulting from the income tax holidays granted to the entity by taxing jurisdictions.

No definition available.

Name:	ntes_IncomeTaxHolidayIncomeTaxBenefitsPerShareDiluted
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Represents the statutory corporate income tax rate in the foreign jurisdiction.

No definition available.

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Represents the preferential tax rate applicable to the entity under the preferential tax treatment.

No definition available.

Name:	ntes_IncomeTaxesPreferentialTaxRate
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The amount of threshold amount of taxable income.

No definition available.

Name:	ntes_TaxableIncome
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Data Type:	xbrli:monetaryItemType
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The amount of income taxes from which a reporting entity is exempt or for which it will receive a reduction in income taxes as a result of the income tax holiday granted by the taxing jurisdiction.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 11.C)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479360/740-10-S99-2

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Per share amount effect of the income tax benefit resulting from the income tax holidays granted by taxing jurisdictions.

Name:	us-gaap_IncomeTaxHolidayIncomeTaxBenefitsPerShare
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Data Type:	dtr-types:perShareItemType
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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.

No definition available.

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Name:	us-gaap_IncomeTaxAuthorityAxis=country_CN
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Name:	dei_LegalEntityAxis=ntes_BoguanNeteaseHangzhouAndCertainOtherPrcSubsidiariesMember
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