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Derivative financial instruments and hedge accounting - Additional Information (Details) - EUR (€) € in Millions	Dec. 31, 2022	Dec. 31, 2021
Derivative financial instruments and hedge accounting
Derivative financial assets	€ 17,068	€ 19,670
Fair value hedges | US Dollars
Derivative financial instruments and hedge accounting
Exchange rate risk deriving from securities	€ 2,723
Hedging instrument	107
Bonds issued	€ 2,684
Cash flow hedges | Sustainability
Derivative financial instruments and hedge accounting
Derivative financial assets	€ 39

X

- Definition

Disclosure of derivative financial instruments

+ References

No definition available.

+ Details

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- Definition

The amount of exchange rate risk deriving from securities.

+ References

No definition available.

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- Definition

The amount of bonds issued by the entity.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

The amount of financial assets classified as derivative instruments. [Refer: Financial assets; Derivatives [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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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
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