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Principal Accounting Policies (Details 8) - PRC	12 Months Ended
	Dec. 31, 2020
General reserve fund
Statutory reserves
Required minimum percentage of annual appropriations	10.00%
Statutory threshold percentage of the reserve fund to the registered capital of the respective company, above which the appropriation is not required	50.00%
Statutory surplus reserve
Statutory reserves
Required minimum percentage of annual appropriations	10.00%
Statutory threshold percentage of the reserve fund to the registered capital of the respective company, above which the appropriation is not required	50.00%

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- Definition

Represents the minimum percentage of statutory after-tax profit required to be appropriated for foreign-invested enterprises or the Company's VIE established in the People's Republic of China until the reserve balance reaches a specified percentage of registered capital.

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No definition available.

+ Details

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- Definition

Represents the statutory requirement ratio of the reserve fund to statutory registered capital after which mandatory contributions to the reserve fund are no longer required for the foreign-invested enterprises or Company's VIE established in the People's Republic of China.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
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- References

No definition available.

+ Details

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- Details

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- Details

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- Details

Name:	ntes_StatutoryReservesAxis=ntes_StatutorySurplusReserveMember
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