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Revenue from Contracts with Customers - Summary of Revenue Recognized (Details) - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure Of Revenue From Contracts With Customers [Abstract]
Amounts included in contract liabilities at the beginning of the year	€ 58,895	€ 84,112	€ 59,583

X

- Definition

Revenue recognized included in contract liabilities at the beginning of the year.

+ References

No definition available.

+ Details

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Namespace Prefix:	bntx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Disclosure of revenue from contracts with customers.

+ References

No definition available.

+ Details

Name:	bntx_DisclosureOfRevenueFromContractsWithCustomersAbstract
Namespace Prefix:	bntx_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration