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.

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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.

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Represents the percentage of the qualified research and development expenses so incurred as tax deductible expenses when determining assessable profits for the year.

No definition available.

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The amount of threshold amount of taxable income.

No definition available.

Name:	ntes_TaxableIncome
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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 231
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482663/740-10-55-231

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 6.I.1.Q1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479360/740-10-S99-1

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

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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.

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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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Data Type:	xbrli:stringItemType
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Name:	us-gaap_IncomeTaxAuthorityAxis=country_HK
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Data Type:	na
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Data Type:	na
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Name:	srt_StatementScenarioAxis=ntes_TaxableIncomeOverThresholdAmountMember
Namespace Prefix:
Data Type:	na
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Name:	us-gaap_IncomeTaxAuthorityAxis=country_CN
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	dei_LegalEntityAxis=ntes_BoguanNeteaseHangzhouAndCertainOtherPrcSubsidiariesMember
Namespace Prefix:
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Balance Type:
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