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Provisions for employee benefits - Costs of defined benefit plans recognized in other comprehensive income (Details) - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Statement |  |  |
Actuarial (gains)/losses due to changes in demographic assumptions | € (11) |  |
Actuarial (gains)/losses due to changes in financial assumptions | 93 | € 60 |
Experience (gains) losses | (16) | 10 |
Return on plan assets | (51) | (23) |
Change in asset ceiling | 1 | (5) |
Remeasurements | 16 | 42 | € 15
Italian defined benefit plans |  |  |
Statement |  |  |
Actuarial (gains)/losses due to changes in demographic assumptions | (3) |  |
Actuarial (gains)/losses due to changes in financial assumptions | 9 | 7 |
Experience (gains) losses | (1) | (2) |
Remeasurements | 5 | 5 |
Foreign defined benefit plan |  |  |
Statement |  |  |
Actuarial (gains)/losses due to changes in demographic assumptions | (10) |  |
Actuarial (gains)/losses due to changes in financial assumptions | 71 | 50 |
Experience (gains) losses | (13) | (9) |
Return on plan assets | (51) | (23) |
Change in asset ceiling | 1 | (5) |
Remeasurements | (2) | 13 |
FISDE and other foreign medical plans |  |  |
Statement |  |  |
Actuarial (gains)/losses due to changes in demographic assumptions | 2 |  |
Actuarial (gains)/losses due to changes in financial assumptions | 13 | 3 |
Experience (gains) losses | (2) | 21 |
Remeasurements | € 13 | € 24 |

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- Definition Actuarial gains (losses) arising from changes in demographic assumptions, before tax + References No definition available. + Details
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- Definition Actuarial gains (losses) arising from changes in financial assumptions, before tax + References No definition available. + Details
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- Definition Actuarial gains (losses) arising from experience adjustments, before tax + References No definition available. + Details
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- Definition Increase (decrease) in asset ceiling, before tax + References No definition available. + Details
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- Definition Return on plan assets excluding interest income or expense + References No definition available. + Details
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- Definition The amount of other comprehensive income, before tax, related to gains (losses) on remeasurements of defined benefit plans, which comprise actuarial gains and losses; the return on plan assets, excluding amounts included in net interest on the net defined benefit liability (asset); and any change in the effect of the asset ceiling, excluding amounts included in net interest on the net defined benefit liability (asset). [Refer: Other comprehensive income, before tax; Defined benefit plans [member]; Plan assets [member]; Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 91 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_91_b&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 7 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_7&doctype=Standard -URIDate 2020-01-01 + Details
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