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Treasury risk management - Disclosure of Outstanding Fixed to Float Interest Rate Swaps (Details) - Interest rate swap contract - Fair value hedges - Interest rate risk - EUR (€) € in Millions	Dec. 31, 2022	Dec. 31, 2021
Disclosure of detailed information about hedges [line items]
Nominal amount of hedging instrument	3,606	1,192
EUR
Disclosure of detailed information about hedges [line items]
Nominal amount of hedging instrument	2,000	0
USD
Disclosure of detailed information about hedges [line items]
Nominal amount of hedging instrument	1,267	1,192
GBP
Disclosure of detailed information about hedges [line items]
Nominal amount of hedging instrument	339	0

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- Definition

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

+ References

No definition available.

+ Details

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- Definition

The nominal amount of a hedging instrument. [Refer: Hedging instruments [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2021-01-01
-Paragraph 23B
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_23B_a&doctype=Standard
-URIDate 2021-03-24

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2021-01-01
-Paragraph 24A
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_24A_d&doctype=Standard
-URIDate 2021-03-24

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