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Provisions for employee benefits - Maturity analysis (Details) - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Disclosure Of Benefit Plans [Line Items] |  |
Net benefit liability (asset) | € 786 | € 819
Other benefit plans |  |
Disclosure Of Benefit Plans [Line Items] |  |
Net benefit liability (asset) | € 341 | € 301
Other benefit plans | Average |  |
Disclosure Of Benefit Plans [Line Items] |  |
Weighted average duration of benefit obligation | 2 years 6 months | 3 years 1 month 6 days
Other benefit plans | within 1 year |  |
Disclosure Of Benefit Plans [Line Items] |  |
Net benefit liability (asset) | € 94 | € 83
Other benefit plans | Later than one year and not later than two years |  |
Disclosure Of Benefit Plans [Line Items] |  |
Net benefit liability (asset) | 95 | 80
Other benefit plans | Later than two years and not later than three years |  |
Disclosure Of Benefit Plans [Line Items] |  |
Net benefit liability (asset) | 85 | 69
Other benefit plans | Later than three years and not later than four years |  |
Disclosure Of Benefit Plans [Line Items] |  |
Net benefit liability (asset) | 30 | 25
Other benefit plans | Later than four years and not later than five years |  |
Disclosure Of Benefit Plans [Line Items] |  |
Net benefit liability (asset) | 16 | 11
Other benefit plans | beyond 5 years |  |
Disclosure Of Benefit Plans [Line Items] |  |
Net benefit liability (asset) | 21 | 33
Italian defined benefit plans |  |
Disclosure Of Benefit Plans [Line Items] |  |
Net benefit liability (asset) | € 177 | € 227
Italian defined benefit plans | Average |  |
Disclosure Of Benefit Plans [Line Items] |  |
Weighted average duration of defined benefit obligation | 7 years 6 months | 9 years 9 months 18 days
Italian defined benefit plans | within 1 year |  |
Disclosure Of Benefit Plans [Line Items] |  |
Net defined benefit liability (asset) | € 14 | € 16
Italian defined benefit plans | Later than one year and not later than two years |  |
Disclosure Of Benefit Plans [Line Items] |  |
Net defined benefit liability (asset) | 13 | 16
Italian defined benefit plans | Later than two years and not later than three years |  |
Disclosure Of Benefit Plans [Line Items] |  |
Net defined benefit liability (asset) | 14 | 18
Italian defined benefit plans | Later than three years and not later than four years |  |
Disclosure Of Benefit Plans [Line Items] |  |
Net defined benefit liability (asset) | 17 | 20
Italian defined benefit plans | Later than four years and not later than five years |  |
Disclosure Of Benefit Plans [Line Items] |  |
Net defined benefit liability (asset) | 15 | 20
Italian defined benefit plans | beyond 5 years |  |
Disclosure Of Benefit Plans [Line Items] |  |
Net defined benefit liability (asset) | 104 | 137
Foreign defined benefit plan |  |
Disclosure Of Benefit Plans [Line Items] |  |
Net benefit liability (asset) | € 142 | € 129
Foreign defined benefit plan | Average |  |
Disclosure Of Benefit Plans [Line Items] |  |
Weighted average duration of defined benefit obligation | 13 years 2 months 12 days | 17 years 7 months 6 days
Foreign defined benefit plan | within 1 year |  |
Disclosure Of Benefit Plans [Line Items] |  |
Net defined benefit liability (asset) | € 29 | € 23
Foreign defined benefit plan | Later than one year and not later than two years |  |
Disclosure Of Benefit Plans [Line Items] |  |
Net defined benefit liability (asset) | 28 | 24
Foreign defined benefit plan | Later than two years and not later than three years |  |
Disclosure Of Benefit Plans [Line Items] |  |
Net defined benefit liability (asset) | 26 | 29
Foreign defined benefit plan | Later than three years and not later than four years |  |
Disclosure Of Benefit Plans [Line Items] |  |
Net defined benefit liability (asset) | 35 | 24
Foreign defined benefit plan | Later than four years and not later than five years |  |
Disclosure Of Benefit Plans [Line Items] |  |
Net defined benefit liability (asset) | 31 | 25
Foreign defined benefit plan | beyond 5 years |  |
Disclosure Of Benefit Plans [Line Items] |  |
Net defined benefit liability (asset) | (7) | 4
FISDE and other foreign medical plans |  |
Disclosure Of Benefit Plans [Line Items] |  |
Net benefit liability (asset) | € 126 | € 162
FISDE and other foreign medical plans | Average |  |
Disclosure Of Benefit Plans [Line Items] |  |
Weighted average duration of defined benefit obligation | 11 years 6 months | 13 years 7 months 6 days
FISDE and other foreign medical plans | within 1 year |  |
Disclosure Of Benefit Plans [Line Items] |  |
Net defined benefit liability (asset) | € 7 | € 9
FISDE and other foreign medical plans | Later than one year and not later than two years |  |
Disclosure Of Benefit Plans [Line Items] |  |
Net defined benefit liability (asset) | 7 | 7
FISDE and other foreign medical plans | Later than two years and not later than three years |  |
Disclosure Of Benefit Plans [Line Items] |  |
Net defined benefit liability (asset) | 7 | 7
FISDE and other foreign medical plans | Later than three years and not later than four years |  |
Disclosure Of Benefit Plans [Line Items] |  |
Net defined benefit liability (asset) | 7 | 7
FISDE and other foreign medical plans | Later than four years and not later than five years |  |
Disclosure Of Benefit Plans [Line Items] |  |
Net defined benefit liability (asset) | 7 | 7
FISDE and other foreign medical plans | beyond 5 years |  |
Disclosure Of Benefit Plans [Line Items] |  |
Net defined benefit liability (asset) | € 91 | € 125

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- Definition The amount of deficit or surplus in a defined benefit plan, adjusted for any effect of limiting a net defined benefit asset to the asset ceiling. [Refer: Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2022-03-24 -Paragraph 140 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_140_a&doctype=Standard -URIDate 2022-03-24 + Details
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