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Taxation - Withholding income tax on dividends (Details) | 12 Months Ended
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Dec. 31, 2020
Withholding income tax |
Withholding tax rate on dividend distributed by foreign investment entities (as a percent) | 10.00%
Withholding tax rate on dividends paid by a FIE to its immediate holding company in Hong Kong (as a percent) | 5.00%
Minimum percentage of ownership interests held by foreign investors for lower withholding tax rate (as a percent) | 25.00%

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- Definition Represents the lower withholding income tax rate on dividends that is applied if the holding company receiving the dividend is located in a country that has a tax treaty with the country in which the foreign investment entity (FIE) is located, if the foreign investor owns directly at least 25% of the shares of the FIE. + References No definition available. + Details
Name: | bili_LowerWithholdingTaxRateOnDividendDistributedByForeignInvestmentEntities
Namespace Prefix: | bili_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition The minimum direct ownership percentage in the foreign invested enterprises owned by the foreign investor, determining whether the lower withholding income tax rate can be applied for dividends distributed by the foreign invested enterprise to its immediate holding company in Hong Kong. + References No definition available. + Details
Name: | bili_MinimumPercentageDirectlyOwnedByForeignInvestorForLowerWithholdingIncomeTaxRate
Namespace Prefix: | bili_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | bili_WithholdingIncomeTaxAbstract
Namespace Prefix: | bili_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the withholding income tax rate on dividends that is applied if the holding company receiving the dividend is located in a country that has a tax treaty with the country in which the foreign investment entity is located. + References No definition available. + Details
Name: | bili_WithholdingTaxRateOnDividendDistributedByForeignInvestmentEntities
Namespace Prefix: | bili_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration