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Employee Benefits (Details) - CNY (¥) ¥ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Employee Benefits |  |  |
Contributions to medical and pension schemes | ¥ 769.4 | ¥ 903.4 | ¥ 788.7
Other employee benefits | 766.8 | 631.8 | 548.6
Total group's employee welfare benefits expense | ¥ 1,536.2 | ¥ 1,535.2 | ¥ 1,337.3

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- Definition Represents the amount of the cost recognized during the period for medical and pension schemes under defined contribution plans. + References No definition available. + Details
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Namespace Prefix: | ntes_
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Period Type: | duration

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- Definition Represents the amount of the cost recognized during the period for other employee benefits under defined contribution plans. + References No definition available. + Details
Name: | ntes_DefinedContributionPlanCostRecognizedOtherEmployeeBenefits
Namespace Prefix: | ntes_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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