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Derivative financial instruments and hedge accounting - Underlying asset or liability by type of risk hedged under cash flow hedge (Details) - Cash flow hedge derivatives - EUR (€) € in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Cash flow hedges [abstract] |  |
Change of underlying asset used for calculation of hedging ineffectiveness | € 83 | € 284
CFH reserve | (1,269) | (7)
Reclassification adjustments on cash flow hedges, before tax | (215) | (941)
Commodity price risk |  |
Cash flow hedges [abstract] |  |
Change of underlying asset used for calculation of hedging ineffectiveness | 86 | 284
CFH reserve | (1,272) | (7)
Reclassification adjustments on cash flow hedges, before tax | (215) | (941)
Commodity price risk | Planned sales |  |
Cash flow hedges [abstract] |  |
Change of underlying asset used for calculation of hedging ineffectiveness | 86 | 284
CFH reserve | (1,272) | (7)
Reclassification adjustments on cash flow hedges, before tax | (215) | € (941)
Interest rate risk |  |
Cash flow hedges [abstract] |  |
Change of underlying asset used for calculation of hedging ineffectiveness | (3) |
CFH reserve | 3 |
Interest rate risk | Hedged flows |  |
Cash flow hedges [abstract] |  |
Change of underlying asset used for calculation of hedging ineffectiveness | (3) |
CFH reserve | € 3 |

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- Definition Cash flow hedge reserve, before tax + References No definition available. + Details
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- References No definition available. + Details
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- Definition The gain (loss) on the change in fair value of the hedged item used as a basis for recognising hedge ineffectiveness. Hedge ineffectiveness is the extent to which the changes in the fair value or the cash flows of the hedging instrument are greater or less than those on the hedged item. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 24B -Subparagraph a -Clause iv -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_24B_a_iv&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 24B -Subparagraph b -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_24B_b_i&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The amount of reclassification adjustments related to cash flow hedges, before tax. Reclassification adjustments are amounts reclassified to profit (loss) in the current period that were recognised in other comprehensive income in the current or previous periods. [Refer: Cash flow hedges [member]; Other comprehensive income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 92 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_92&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2023-01-01 -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 23 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_23_d&doctype=Standard&book=b -URIDate 2021-03-24 + Details
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- Details
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