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Related Party Disclosures - Summary of Outstanding Balances of Transactions Related to Key Management Personnel (Details) - Key Management Personnel of Entity or Parent - EUR (€) € in Thousands	Dec. 31, 2020	Dec. 31, 2019
Disclosure Of Transactions Between Related Parties [Line Items]
Outstanding balances	€ 1,236	€ 1,843
Consulting Service Provider
Disclosure Of Transactions Between Related Parties [Line Items]
Outstanding balances	7
TRON
Disclosure Of Transactions Between Related Parties [Line Items]
Outstanding balances	€ 1,229	€ 1,843

X

- Definition

The amounts payable resulting from related party transactions. [Refer: Related parties [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 24
-IssueDate 2020-01-01
-Paragraph 20
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=24&code=ifrs-tx-2020-en-r&anchor=para_20&doctype=Standard
-URIDate 2020-01-01

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 24
-IssueDate 2020-01-01
-Paragraph 18
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=24&code=ifrs-tx-2020-en-r&anchor=para_18_b&doctype=Standard
-URIDate 2020-01-01

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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Balance Type:	na
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- Details

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Namespace Prefix:
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- Details

Name:	srt_CounterpartyNameAxis=bntx_ConsultingServiceProviderMember
Namespace Prefix:
Data Type:	na
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X

- Details

Name:	srt_CounterpartyNameAxis=bntx_TRONMember
Namespace Prefix:
Data Type:	na
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Period Type: