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Employee Benefits (Details) - CNY (¥) ¥ in Thousands	12 Months Ended
	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

X

- 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
Balance Type:	debit
Period Type:	duration

X

- Definition

Contributions to government-mandated plans for medical and pension benefits.

+ References

No definition available.

+ Details

Name:	bili_DefinedContributionPlanCostRecognizedPensionAndMedical
Namespace Prefix:	bili_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- 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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Balance Type:	debit
Period Type:	duration