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Taxation (Details 5)	4 Months Ended	9 Months Ended	11 Months Ended	12 Months Ended
	Apr. 30, 2018	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2020
Sales tax
Value added tax rate, services provided (as a percent)				6.00%
Value added tax rate, sales of general goods (as a percent)	17.00%	13.00%	16.00%	13.00%

X

- Definition

Abstract of sales tax, includes, but not limited to business tax, cultural development fee and value added tax.

+ References

No definition available.

+ Details

Name:	ntes_SalesTaxAbstract
Namespace Prefix:	ntes_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Value Added Tax rate applied on gross sales proceeds received from sale of goods.

+ References

No definition available.

+ Details

Name:	ntes_ValueAddedTaxRateSaleOfGoods
Namespace Prefix:	ntes_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Value Added Tax rate applied on revenues earned from services provided.

+ References

No definition available.

+ Details

Name:	ntes_ValueAddedTaxRateServicesProvided
Namespace Prefix:	ntes_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration