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Related Party Disclosures - Summary of Aggregate Value of Transactions Related to Key Management Personnel (Details) - Key Management Personnel of Entity or Parent - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure Of Transactions Between Related Parties [Line Items]
Consulting services / patent assignment	€ 25	€ 56	€ 25
Purchases of various goods and services from TRON	10,105	9,968	11,160
Total	€ 10,130	€ 10,024	€ 11,185

X

- Definition

Consulting services and patent assignment.

+ References

No definition available.

+ Details

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Period Type:	duration

X

- Definition

Goods and services from related party transactions.

+ References

No definition available.

+ Details

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Balance Type:	debit
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X

- Definition

Purchases of goods and service related party transactions.

+ References

No definition available.

+ Details

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Namespace Prefix:	bntx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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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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- Details

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