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Provisions for employee benefits (Details 8) € in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 EUR (€) | Dec. 31, 2017 EUR (€) | Dec. 31, 2016 EUR (€)
Statement [Line Items] |  |  |
Net defined benefit liability (asset) | € 136 | € 31 | € 3
Italian defined benefit plans [Member] | Not later than one year [member] |  |  |
Statement [Line Items] |  |  |
Net defined benefit liability (asset) | 15 | 16 |
Italian defined benefit plans [Member] | Later than one year and not later than two years [member] |  |  |
Statement [Line Items] |  |  |
Net defined benefit liability (asset) | 16 | 17 |
Italian defined benefit plans [Member] | Later than two years and not later than three years [member] |  |  |
Statement [Line Items] |  |  |
Net defined benefit liability (asset) | 18 | 18 |
Italian defined benefit plans [Member] | Later than three years and not later than four years [member] |  |  |
Statement [Line Items] |  |  |
Net defined benefit liability (asset) | 14 | 17 |
Italian defined benefit plans [Member] | Later than three years and not later than five years [member] |  |  |
Statement [Line Items] |  |  |
Net defined benefit liability (asset) | 11 | 14 |
Italian defined benefit plans [Member] | Later than five years [member] |  |  |
Statement [Line Items] |  |  |
Net defined benefit liability (asset) | € 201 | € 202 |
Italian defined benefit plans [Member] | Weighted Average Duration [Member] |  |  |
Statement [Line Items] |  |  |
Weighted average duration of defined benefit obligation | Pure | 10.1 | 10.1 |
Foreign defined benefit plan [Member] | Not later than one year [member] |  |  |
Statement [Line Items] |  |  |
Net defined benefit liability (asset) | € 54 | € 47 |
Foreign defined benefit plan [Member] | Later than one year and not later than two years [member] |  |  |
Statement [Line Items] |  |  |
Net defined benefit liability (asset) | 56 | 65 |
Foreign defined benefit plan [Member] | Later than two years and not later than three years [member] |  |  |
Statement [Line Items] |  |  |
Net defined benefit liability (asset) | 63 | 70 |
Foreign defined benefit plan [Member] | Later than three years and not later than four years [member] |  |  |
Statement [Line Items] |  |  |
Net defined benefit liability (asset) | 64 | 79 |
Foreign defined benefit plan [Member] | Later than three years and not later than five years [member] |  |  |
Statement [Line Items] |  |  |
Net defined benefit liability (asset) | 74 | 84 |
Foreign defined benefit plan [Member] | Later than five years [member] |  |  |
Statement [Line Items] |  |  |
Net defined benefit liability (asset) | € 74 | € 64 |
Foreign defined benefit plan [Member] | Weighted Average Duration [Member] |  |  |
Statement [Line Items] |  |  |
Weighted average duration of defined benefit obligation | Pure | 17.4 | 17.5 |
FISDE and other foreign medical plans [Member] | Not later than one year [member] |  |  |
Statement [Line Items] |  |  |
Net defined benefit liability (asset) | € 9 | € 7 |
FISDE and other foreign medical plans [Member] | Later than one year and not later than two years [member] |  |  |
Statement [Line Items] |  |  |
Net defined benefit liability (asset) | 7 | 7 |
FISDE and other foreign medical plans [Member] | Later than two years and not later than three years [member] |  |  |
Statement [Line Items] |  |  |
Net defined benefit liability (asset) | 6 | 6 |
FISDE and other foreign medical plans [Member] | Later than three years and not later than four years [member] |  |  |
Statement [Line Items] |  |  |
Net defined benefit liability (asset) | 6 | 6 |
FISDE and other foreign medical plans [Member] | Later than three years and not later than five years [member] |  |  |
Statement [Line Items] |  |  |
Net defined benefit liability (asset) | 6 | 6 |
FISDE and other foreign medical plans [Member] | Later than five years [member] |  |  |
Statement [Line Items] |  |  |
Net defined benefit liability (asset) | € 114 | € 103 |
FISDE and other foreign medical plans [Member] | Weighted Average Duration [Member] |  |  |
Statement [Line Items] |  |  |
Weighted average duration of defined benefit obligation | Pure | 12.8 | 12.8 |
Other benefit plans [Member] | Not later than one year [member] |  |  |
Statement [Line Items] |  |  |
Net defined benefit liability (asset) | € 81 | € 64 |
Other benefit plans [Member] | Later than one year and not later than two years [member] |  |  |
Statement [Line Items] |  |  |
Net defined benefit liability (asset) | 72 | 58 |
Other benefit plans [Member] | Later than two years and not later than three years [member] |  |  |
Statement [Line Items] |  |  |
Net defined benefit liability (asset) | 67 | 45 |
Other benefit plans [Member] | Later than three years and not later than four years [member] |  |  |
Statement [Line Items] |  |  |
Net defined benefit liability (asset) | 20 | 7 |
Other benefit plans [Member] | Later than three years and not later than five years [member] |  |  |
Statement [Line Items] |  |  |
Net defined benefit liability (asset) | 17 | 5 |
Other benefit plans [Member] | Later than five years [member] |  |  |
Statement [Line Items] |  |  |
Net defined benefit liability (asset) | € 57 | € 25 |
Other benefit plans [Member] | Weighted Average Duration [Member] |  |  |
Statement [Line Items] |  |  |
Weighted average duration of defined benefit obligation | Pure | 2.6 | 2.8 |

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