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Employee Benefits (Details) - CNY (¥) ¥ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Employee Benefits |  |  |
Contributions to medical and pension schemes | ¥ 732,465 | ¥ 814,296 | ¥ 934,876
Other employee benefits | 108,142 | 92,797 | 99,303
Total | ¥ 840,607 | ¥ 907,093 | ¥ 1,034,179

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- Definition Contributions to government-mandated plans for other employee benefits. + References No definition available. + Details
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Namespace Prefix: | bili_
Data Type: | xbrli:monetaryItemType
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Period Type: | duration

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- Definition Contributions to government-mandated plans for medical and pension benefits. + References No definition available. + Details
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Namespace Prefix: | bili_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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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 -Topic 715 -SubTopic 70 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480794/715-70-50-1 + Details
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Namespace Prefix: | us-gaap_
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