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Property, plant and equipment (Details) - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Disclosure Of Property Plant And Equipment Explanatory [Line Items] |  |
Net book amount - beginning of the year | € 63,158 | € 70,793
Additions | 8,778 | 8,490
Depreciation | (6,606) | (7,199)
Reversals | 426 | 1,055
Impairments | (1,276) | (848)
Write-off | (84) | (239)
Disposals | (639) | (1,448)
Currency translation differences | 2,098 | (7,025)
Decrease through loss of control of subsidiary | (4,877) |
Transfers |  |
Other changes | (676) | (421)
Provisions for depreciation and impairments | 16,471 |
Net book amount - end of the year | 60,302 | 63,158
Land and buildings [member] |  |
Disclosure Of Property Plant And Equipment Explanatory [Line Items] |  |
Net book amount - beginning of the year | 1,313 | 1,258
Additions | 18 | 22
Depreciation | (65) | (71)
Reversals | 41 | 5
Impairments | (61) | (2)
Disposals | (2) | (15)
Currency translation differences | 2 | (5)
Decrease through loss of control of subsidiary | 1 |
Transfers | 81 | 84
Other changes | (54) | 37
Net book amount - end of the year | 1,274 | 1,313
E&P wells, plant and machinery [Member] |  |
Disclosure Of Property Plant And Equipment Explanatory [Line Items] |  |
Net book amount - beginning of the year | 45,782 | 47,090
Additions | 432 | 42
Depreciation | (6,012) | (6,583)
Reversals | 299 | 608
Impairments | (477) | (491)
Write-off | (12) | (3)
Disposals | (400) |
Disposals |  | 3
Currency translation differences | 1,623 | (5,155)
Decrease through loss of control of subsidiary | (4,388) |
Transfers | 6,795 | 9,940
Other changes | (786) | 331
Net book amount - end of the year | 42,856 | 45,782
Other plant and machinery [Member] |  |
Disclosure Of Property Plant And Equipment Explanatory [Line Items] |  |
Net book amount - beginning of the year | 3,877 | 3,789
Additions | 173 | 190
Depreciation | (529) | (545)
Reversals | 86 | 273
Impairments | (73) | (83)
Write-off | (1) | (2)
Disposals | (9) | (6)
Currency translation differences | 36 | (143)
Decrease through loss of control of subsidiary | 32 |
Transfers | 461 | 629
Other changes | (152) | (225)
Net book amount - end of the year | 3,901 | 3,877
E&P exploration assets and appraisal [member] |  |
Disclosure Of Property Plant And Equipment Explanatory [Line Items] |  |
Net book amount - beginning of the year | 1,371 | 1,905
Additions | 330 | 351
Depreciation |  |
Reversals |  |
Impairments |  |
Write-off | (66) | (232)
Disposals | (32) |
Currency translation differences | 53 | (193)
Decrease through loss of control of subsidiary | (58) |
Transfers | (294) | (265)
Other changes | (37) | (195)
Net book amount - end of the year | 1,267 | 1,371
E&P tangible assets in progress [Member] |  |
Disclosure Of Property Plant And Equipment Explanatory [Line Items] |  |
Net book amount - beginning of the year | 9,469 | 15,135
Additions | 6,947 | 7,302
Depreciation |  |
Reversals |  | 169
Impairments | (548) | (146)
Write-off | (4) | (2)
Disposals | (198) | (1,376)
Currency translation differences | 385 | (1,527)
Decrease through loss of control of subsidiary | (474) |
Transfers | (6,501) | (9,673)
Other changes | 119 | (413)
Net book amount - end of the year | 9,195 | 9,469
Other tangible assets in progress and advances [Member] |  |
Disclosure Of Property Plant And Equipment Explanatory [Line Items] |  |
Net book amount - beginning of the year | 1,346 | 1,616
Additions | 878 | 583
Depreciation |  |
Reversals |  |
Impairments | (117) | (126)
Write-off | (1) |
Disposals |  | (54)
Disposals | 2 |
Currency translation differences | (1) | (2)
Decrease through loss of control of subsidiary | 10 |
Transfers | (542) | (715)
Other changes | 234 | 44
Net book amount - end of the year | 1,809 | 1,346
Gross carrying amount [member] |  |
Disclosure Of Property Plant And Equipment Explanatory [Line Items] |  |
Net book amount - beginning of the year | 183,777 |
Net book amount - end of the year | 183,284 | 183,777
Gross carrying amount [member] | Land and buildings [member] |  |
Disclosure Of Property Plant And Equipment Explanatory [Line Items] |  |
Net book amount - beginning of the year | 4,061 |
Net book amount - end of the year | 4,060 | 4,061
Gross carrying amount [member] | E&P wells, plant and machinery [Member] |  |
Disclosure Of Property Plant And Equipment Explanatory [Line Items] |  |
Net book amount - beginning of the year | 137,223 |
Net book amount - end of the year | 135,467 | 137,223
Gross carrying amount [member] | Other plant and machinery [Member] |  |
Disclosure Of Property Plant And Equipment Explanatory [Line Items] |  |
Net book amount - beginning of the year | 26,746 |
Net book amount - end of the year | 27,516 | 26,746
Gross carrying amount [member] | E&P exploration assets and appraisal [member] |  |
Disclosure Of Property Plant And Equipment Explanatory [Line Items] |  |
Net book amount - beginning of the year | 1,371 |
Net book amount - end of the year | 1,267 | 1,371
Gross carrying amount [member] | E&P tangible assets in progress [Member] |  |
Disclosure Of Property Plant And Equipment Explanatory [Line Items] |  |
Net book amount - beginning of the year | 12,315 |
Net book amount - end of the year | 12,559 | 12,315
Gross carrying amount [member] | Other tangible assets in progress and advances [Member] |  |
Disclosure Of Property Plant And Equipment Explanatory [Line Items] |  |
Net book amount - beginning of the year | 2,061 |
Net book amount - end of the year | 2,415 | 2,061
Accumulated impairment [member] |  |
Disclosure Of Property Plant And Equipment Explanatory [Line Items] |  |
Provisions for depreciation and impairments | 122,982 | 120,619
Accumulated impairment [member] | Land and buildings [member] |  |
Disclosure Of Property Plant And Equipment Explanatory [Line Items] |  |
Provisions for depreciation and impairments | 2,786 | 2,748
Accumulated impairment [member] | E&P wells, plant and machinery [Member] |  |
Disclosure Of Property Plant And Equipment Explanatory [Line Items] |  |
Provisions for depreciation and impairments | 92,611 | 91,441
Accumulated impairment [member] | Other plant and machinery [Member] |  |
Disclosure Of Property Plant And Equipment Explanatory [Line Items] |  |
Provisions for depreciation and impairments | 23,615 | 22,869
Accumulated impairment [member] | E&P exploration assets and appraisal [member] |  |
Disclosure Of Property Plant And Equipment Explanatory [Line Items] |  |
Provisions for depreciation and impairments |  |
Accumulated impairment [member] | E&P tangible assets in progress [Member] |  |
Disclosure Of Property Plant And Equipment Explanatory [Line Items] |  |
Provisions for depreciation and impairments | 3,364 | 2,846
Accumulated impairment [member] | Other tangible assets in progress and advances [Member] |  |
Disclosure Of Property Plant And Equipment Explanatory [Line Items] |  |
Provisions for depreciation and impairments | € 606 | € 715

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- Definition The amount of impairment loss recognised in profit or loss for property, plant and equipment. [Refer: Impairment loss recognised in profit or loss; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2018-01-01 -Paragraph 73 -Subparagraph e -Clause v -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2018-03-01&anchor=para_73_e_v&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 98 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_98_a&doctype=Standard -URIDate 2018-03-16 + Details
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