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Guarantees, commitments and risks (Details 8) - EUR (€) € in Millions | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | ---
Statement Line Items [Line Items] |  |  |  |  |
Operating lease obligations |  | € 3,953 | [1] | € 4,532 | € 2,418
Decommissioning liabilities | [2] | 13,814 |  |  |
Environmental liabilities |  | 2,596 |  |  |
Purchase obligations | [3] | 131,824 |  |  |
Other obligations |  | 116 |  |  |
Contractual obligations |  | 152,303 |  |  |
Gas take or pay contracts [Member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Purchase obligations |  | 125,872 |  |  |
Gas ship or pay contracts [Member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Purchase obligations |  | 3,851 |  |  |
Other purchase obligations [Member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Purchase obligations |  | 2,101 |  |  |
Memorandum of intent Val d'Agri [Member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Other obligations |  | 116 |  |  |
Not later than one year [member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Operating lease obligations |  | 776 | [1] | 883 | 593
Decommissioning liabilities | [2] | 335 |  |  |
Environmental liabilities |  | 349 |  |  |
Purchase obligations | [3] | 14,674 |  |  |
Other obligations |  | 8 |  |  |
Contractual obligations |  | 16,142 |  |  |
Not later than one year [member] | Gas take or pay contracts [Member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Purchase obligations |  | 11,886 |  |  |
Not later than one year [member] | Gas ship or pay contracts [Member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Purchase obligations |  | 1,164 |  |  |
Not later than one year [member] | Other purchase obligations [Member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Purchase obligations |  | 1,624 |  |  |
Not later than one year [member] | Memorandum of intent Val d'Agri [Member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Other obligations |  | 8 |  |  |
Later than one year and not later than two years [member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Operating lease obligations | [1] | 601 |  |  |
Decommissioning liabilities | [2] | 294 |  |  |
Environmental liabilities |  | 321 |  |  |
Purchase obligations | [3] | 11,258 |  |  |
Other obligations |  | 1 |  |  |
Contractual obligations |  | 12,475 |  |  |
Later than one year and not later than two years [member] | Gas take or pay contracts [Member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Purchase obligations |  | 10,470 |  |  |
Later than one year and not later than two years [member] | Gas ship or pay contracts [Member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Purchase obligations |  | 558 |  |  |
Later than one year and not later than two years [member] | Other purchase obligations [Member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Purchase obligations |  | 230 |  |  |
Later than one year and not later than two years [member] | Memorandum of intent Val d'Agri [Member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Other obligations |  | 1 |  |  |
Later than two years and not later than three years [member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Operating lease obligations | [1] | 481 |  |  |
Decommissioning liabilities | [2] | 407 |  |  |
Environmental liabilities |  | 254 |  |  |
Purchase obligations | [3] | 10,649 |  |  |
Other obligations |  | 1 |  |  |
Contractual obligations |  | 11,792 |  |  |
Later than two years and not later than three years [member] | Gas take or pay contracts [Member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Purchase obligations |  | 9,995 |  |  |
Later than two years and not later than three years [member] | Gas ship or pay contracts [Member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Purchase obligations |  | 482 |  |  |
Later than two years and not later than three years [member] | Other purchase obligations [Member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Purchase obligations |  | 172 |  |  |
Later than two years and not later than three years [member] | Memorandum of intent Val d'Agri [Member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Other obligations |  | 1 |  |  |
Later than three years and not later than four years [member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Operating lease obligations | [1] | 303 |  |  |
Decommissioning liabilities | [2] | 260 |  |  |
Environmental liabilities |  | 239 |  |  |
Purchase obligations | [3] | 9,683 |  |  |
Other obligations |  | 1 |  |  |
Contractual obligations |  | 10,486 |  |  |
Later than three years and not later than four years [member] | Gas take or pay contracts [Member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Purchase obligations |  | 9,276 |  |  |
Later than three years and not later than four years [member] | Gas ship or pay contracts [Member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Purchase obligations |  | 382 |  |  |
Later than three years and not later than four years [member] | Other purchase obligations [Member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Purchase obligations |  | 25 |  |  |
Later than three years and not later than four years [member] | Memorandum of intent Val d'Agri [Member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Other obligations |  | 1 |  |  |
Later than four years and not later than five years [member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Operating lease obligations | [1] | 268 |  |  |
Decommissioning liabilities | [2] | 124 |  |  |
Environmental liabilities |  | 188 |  |  |
Purchase obligations | [3] | 9,546 |  |  |
Other obligations |  | 1 |  |  |
Contractual obligations |  | 10,127 |  |  |
Later than four years and not later than five years [member] | Gas take or pay contracts [Member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Purchase obligations |  | 9,210 |  |  |
Later than four years and not later than five years [member] | Gas ship or pay contracts [Member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Purchase obligations |  | 324 |  |  |
Later than four years and not later than five years [member] | Other purchase obligations [Member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Purchase obligations |  | 12 |  |  |
Later than four years and not later than five years [member] | Memorandum of intent Val d'Agri [Member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Other obligations |  | 1 |  |  |
Later than five years [member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Operating lease obligations |  | 1,524 | [1] | € 1,939 | € 785
Decommissioning liabilities | [2] | 12,394 |  |  |
Environmental liabilities |  | 1,245 |  |  |
Purchase obligations | [3] | 76,014 |  |  |
Other obligations |  | 104 |  |  |
Contractual obligations |  | 91,281 |  |  |
Later than five years [member] | Gas take or pay contracts [Member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Purchase obligations |  | 75,035 |  |  |
Later than five years [member] | Gas ship or pay contracts [Member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Purchase obligations |  | 941 |  |  |
Later than five years [member] | Other purchase obligations [Member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Purchase obligations |  | 38 |  |  |
Later than five years [member] | Memorandum of intent Val d'Agri [Member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Other obligations |  | € 104 |  |  |
[1] | There are no significant restrictions provided by these operating leases which limit the ability of the Company to pay dividend, use assets or to take on new borrowings.
[2] | Represents the estimated future costs for the decommissioning of oil and natural gas production facilities at the end of the producing lives of fields, well-plugging, abandonment and site restoration.
[3] | Represents any agreement to purchase goods or services that is enforceable and legally binding and that specifies all significant terms.

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- Definition The amount of future minimum lease payments payable under non-cancellable operating leases. Minimum lease payments are payments over the lease term that the lessee is or can be required to make, excluding contingent rent, costs for services and taxes to be paid by, and reimbursed to, the lessor, together with: (a) for a lessee, any amounts guaranteed by the lessee or by a party related to the lessee; or (b) for a lessor, any residual value guaranteed to the lessor by: (i) the lessee; (ii) a party related to the lessee; or (iii) a third party unrelated to the lessor that is financially capable of discharging the obligations under the guarantee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2019-01-01 -Name IAS -Number 17 -IssueDate 2018-01-01 -Paragraph 35 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=17&date=2018-03-02&anchor=para_35_a&doctype=Standard&book=b -URIDate 2018-03-16 + Details
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