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Provisions for employee benefits - Effects of a possible change in the main actuarial assumptions (Details) - EUR (€) € in Millions | Dec. 31, 2019 | Dec. 31, 2018
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Statement |  |
Percentage of reasonably possible increase in actuarial assumption | 0.50% | 0.50%
Percentage of reasonably possible decrease in actuarial assumption | 0.50% | 0.50%
Other benefit plans | Actuarial assumption of discount rates |  |
Statement |  |
Increase (decrease) in other benefit obligation due to reasonably possible increase in actuarial assumption | € (4) | € (5)
Increase (decrease) in other benefit obligation due to reasonably possible decrease in actuarial assumption | 1 | 3
Other benefit plans | Actuarial assumption of expected rates of inflation |  |
Statement |  |
Increase (decrease) in other benefit obligation due to reasonably possible increase in actuarial assumption | 1 | 1
Italian defined benefit plans | Actuarial assumption of discount rates |  |
Statement |  |
Increase (decrease) in defined benefit obligation due to reasonably possible increase in actuarial assumption | (12) | (12)
Increase (decrease) in defined benefit obligation due to reasonably possible decrease in actuarial assumption | 13 | 13
Italian defined benefit plans | Actuarial assumption of expected rates of inflation |  |
Statement |  |
Increase (decrease) in defined benefit obligation due to reasonably possible increase in actuarial assumption | 8 | 8
Foreign defined benefit plan | Actuarial assumption of discount rates |  |
Statement |  |
Increase (decrease) in defined benefit obligation due to reasonably possible increase in actuarial assumption | (67) | (58)
Increase (decrease) in defined benefit obligation due to reasonably possible decrease in actuarial assumption | 77 | 65
Foreign defined benefit plan | Actuarial assumption of expected rates of inflation |  |
Statement |  |
Increase (decrease) in defined benefit obligation due to reasonably possible increase in actuarial assumption | 31 | 23
Foreign defined benefit plan | Actuarial assumption of expected rates of salary increases |  |
Statement |  |
Increase (decrease) in defined benefit obligation due to reasonably possible increase in actuarial assumption | 18 | 15
Foreign defined benefit plan | Actuarial assumption of expected rates of pension increases |  |
Statement |  |
Increase (decrease) in defined benefit obligation due to reasonably possible increase in actuarial assumption | 34 | 18
FISDE and other foreign medical plans | Actuarial assumption of discount rates |  |
Statement |  |
Increase (decrease) in defined benefit obligation due to reasonably possible increase in actuarial assumption | (9) | (7)
Increase (decrease) in defined benefit obligation due to reasonably possible decrease in actuarial assumption | 10 | 8
FISDE and other foreign medical plans | Actuarial assumption of medical cost trend rates |  |
Statement |  |
Increase (decrease) in defined benefit obligation due to reasonably possible increase in actuarial assumption | € 10 | € 6

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- Definition The increase (decrease) in a other benefit obligation that would have been caused by a decrease in a significant actuarial assumption that was reasonably possible at the end of the reporting period. + References No definition available. + Details
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- Definition The increase (decrease) in a other benefit obligation that would have been caused by an increase in a significant actuarial assumption that was reasonably possible at the end of the reporting period. + References No definition available. + Details
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- Definition The increase (decrease) in a defined benefit obligation that would have been caused by a decrease in a significant actuarial assumption that was reasonably possible at the end of the reporting period. [Refer: Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2019-01-01 -Paragraph 145 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2019-en-r&anchor=para_145_a&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The increase (decrease) in a defined benefit obligation that would have been caused by an increase in a significant actuarial assumption that was reasonably possible at the end of the reporting period. [Refer: Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2019-01-01 -Paragraph 145 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2019-en-r&anchor=para_145_a&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The reasonably possible percentage of the decrease in the actuarial assumption used to determine the present value of defined benefit obligation. [Refer: Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2019-01-01 -Paragraph 145 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2019-en-r&anchor=para_145_a&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The reasonably possible percentage of the increase in the actuarial assumption used to determine the present value of defined benefit obligation. [Refer: Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2019-01-01 -Paragraph 145 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2019-en-r&anchor=para_145_a&doctype=Standard -URIDate 2019-03-27 + Details
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