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Property, plant and equipment (Details) - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Property, plant and equipment |  |
Property, plant and equipment - beginning of the year | € 62,192 | € 60,302
Additions | 4,407 | 8,049
Depreciation capitalized | 104 | 216
Depreciation | (6,205) | (7,032)
Reversals | 648 | 382
Impairments | (3,754) | (2,412)
Write-off | (305) | (270)
Disposals |  | (113)
Currency translation differences | (4,140) | 1,044
Initial recognition and changes in estimates | 955 | 2,074
Other changes | 41 | (48)
Property, plant and equipment - end of the year | 53,943 | 62,192
Land and buildings |  |
Property, plant and equipment |  |
Property, plant and equipment - beginning of the year | 1,218 | 1,274
Additions | 12 | 12
Depreciation | (55) | (60)
Reversals | 13 | 44
Impairments | (82) | (47)
Disposals |  | (1)
Currency translation differences | (2) | 2
Transfers | 39 | 42
Other changes | (15) | (48)
Property, plant and equipment - end of the year | 1,128 | 1,218
E&P wells, plant and machinery |  |
Property, plant and equipment |  |
Property, plant and equipment - beginning of the year | 46,492 | 42,856
Additions | 6 | 144
Depreciation | (5,642) | (6,435)
Reversals | 183 | 65
Impairments | (1,551) | (659)
Disposals |  | (3)
Currency translation differences | (3,325) | 815
Initial recognition and changes in estimates | 870 | 2,028
Transfers | 2,677 | 7,568
Other changes | (62) | 113
Property, plant and equipment - end of the year | 39,648 | 46,492
Other plant and machinery |  |
Property, plant and equipment |  |
Property, plant and equipment - beginning of the year | 3,632 | 3,901
Additions | 229 | 223
Depreciation | (508) | (537)
Reversals | 342 | 69
Impairments | (972) | (500)
Write-off | (1) | (5)
Disposals |  | (1)
Currency translation differences | (75) | 21
Transfers | 755 | 597
Other changes | (103) | (136)
Property, plant and equipment - end of the year | 3,299 | 3,632
E&P exploration assets and appraisal |  |
Property, plant and equipment |  |
Property, plant and equipment - beginning of the year | 1,563 | 1,267
Additions | 265 | 508
Depreciation capitalized | 4 | 14
Write-off | (296) | (216)
Disposals |  | (22)
Currency translation differences | (119) | 24
Initial recognition and changes in estimates | (9) | 25
Transfers | (47) | (42)
Other changes | (20) | 5
Property, plant and equipment - end of the year | 1,341 | 1,563
E&P tangible assets in progress |  |
Property, plant and equipment |  |
Property, plant and equipment - beginning of the year | 7,412 | 9,195
Additions | 3,127 | 6,170
Depreciation capitalized | 100 | 202
Reversals | 98 | 65
Impairments | (567) | (669)
Write-off | (7) | (49)
Disposals |  | (80)
Currency translation differences | (605) | 181
Initial recognition and changes in estimates | 94 | 21
Transfers | (2,630) | (7,526)
Other changes | 96 | (98)
Property, plant and equipment - end of the year | 7,118 | 7,412
Other tangible assets in progress and advances |  |
Property, plant and equipment |  |
Property, plant and equipment - beginning of the year | 1,875 | 1,809
Additions | 768 | 992
Reversals | 12 | 139
Impairments | (582) | (537)
Write-off | (1) |
Disposals |  | (6)
Currency translation differences | (14) | 1
Transfers | (794) | (639)
Other changes | 145 | 116
Property, plant and equipment - end of the year | 1,409 | 1,875
Gross carrying amount |  |
Property, plant and equipment |  |
Property, plant and equipment - beginning of the year | 192,815 |
Property, plant and equipment - end of the year | 184,641 | 192,815
Gross carrying amount | Land and buildings |  |
Property, plant and equipment |  |
Property, plant and equipment - beginning of the year | 4,067 |
Property, plant and equipment - end of the year | 4,082 | 4,067
Gross carrying amount | E&P wells, plant and machinery |  |
Property, plant and equipment |  |
Property, plant and equipment - beginning of the year | 144,789 |
Property, plant and equipment - end of the year | 136,468 | 144,789
Gross carrying amount | Other plant and machinery |  |
Property, plant and equipment |  |
Property, plant and equipment - beginning of the year | 28,191 |
Property, plant and equipment - end of the year | 28,839 | 28,191
Gross carrying amount | E&P exploration assets and appraisal |  |
Property, plant and equipment |  |
Property, plant and equipment - beginning of the year | 1,563 |
Property, plant and equipment - end of the year | 1,341 | 1,563
Gross carrying amount | E&P tangible assets in progress |  |
Property, plant and equipment |  |
Property, plant and equipment - beginning of the year | 11,406 |
Property, plant and equipment - end of the year | 11,169 | 11,406
Gross carrying amount | Other tangible assets in progress and advances |  |
Property, plant and equipment |  |
Property, plant and equipment - beginning of the year | 2,799 |
Property, plant and equipment - end of the year | 2,742 | 2,799
Accumulated depreciation, amortisation and impairment |  |
Property, plant and equipment |  |
Property, plant and equipment - beginning of the year | (130,623) |
Property, plant and equipment - end of the year | (130,698) | (130,623)
Accumulated depreciation, amortisation and impairment | Land and buildings |  |
Property, plant and equipment |  |
Property, plant and equipment - beginning of the year | (2,849) |
Property, plant and equipment - end of the year | (2,954) | (2,849)
Accumulated depreciation, amortisation and impairment | E&P wells, plant and machinery |  |
Property, plant and equipment |  |
Property, plant and equipment - beginning of the year | (98,297) |
Property, plant and equipment - end of the year | (96,820) | (98,297)
Accumulated depreciation, amortisation and impairment | Other plant and machinery |  |
Property, plant and equipment |  |
Property, plant and equipment - beginning of the year | (24,559) |
Property, plant and equipment - end of the year | (25,540) | (24,559)
Accumulated depreciation, amortisation and impairment | E&P tangible assets in progress |  |
Property, plant and equipment |  |
Property, plant and equipment - beginning of the year | (3,994) |
Property, plant and equipment - end of the year | (4,051) | (3,994)
Accumulated depreciation, amortisation and impairment | Other tangible assets in progress and advances |  |
Property, plant and equipment |  |
Property, plant and equipment - beginning of the year | (924) |
Property, plant and equipment - end of the year | € (1,333) | € (924)

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