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Tangible assets - Disclosure of detailed information about property, plant and equipment (Details) - EUR (€) € in Millions | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | --- | ---
Property, plant and equipment for own use |  |  |
Carrying amount | € 26,416 | € 31,212 | € 32,926
For own use | Property, plant and equipment |  |  |
Property, plant and equipment for own use |  |  |
Carrying amount | 11,663 | 12,636 | 13,408
For own use | Cost | Property, plant and equipment |  |  |
Property, plant and equipment for own use |  |  |
Carrying amount | 24,141 | 25,656 | 26,243
For own use | Cost | Right-of-use for operating lease |  |  |
Property, plant and equipment for own use |  |  |
Carrying amount | 1,556 | 1,918 | 2,183
For own use | Accumulated depreciation | Property, plant and equipment |  |  |
Property, plant and equipment for own use |  |  |
Carrying amount | (12,129) | (12,619) | (12,637)
For own use | Impairment losses | Property, plant and equipment |  |  |
Property, plant and equipment for own use |  |  |
Carrying amount | (349) | (401) | (198)
Land and buildings | Property, plant and equipment |  |  |
Property, plant and equipment for own use |  |  |
Carrying amount | 8,404 | 9,244 | 9,809
Land and buildings | Cost | Property, plant and equipment |  |  |
Property, plant and equipment for own use |  |  |
Carrying amount | 14,067 | 15,113 | 14,973
Land and buildings | Cost | Right-of-use for operating lease |  |  |
Property, plant and equipment for own use |  |  |
Carrying amount | 1,536 | 1,882 | 2,104
Land and buildings | Accumulated depreciation | Property, plant and equipment |  |  |
Property, plant and equipment for own use |  |  |
Carrying amount | (5,359) | (5,516) | (5,010)
Land and buildings | Impairment losses | Property, plant and equipment |  |  |
Property, plant and equipment for own use |  |  |
Carrying amount | (304) | (353) | (154)
IT equipment and fixtures | Property, plant and equipment |  |  |
Property, plant and equipment for own use |  |  |
Carrying amount | 1,191 | 1,357 | 1,460
IT equipment and fixtures | Cost | Property, plant and equipment |  |  |
Property, plant and equipment for own use |  |  |
Carrying amount | 4,204 | 5,283 | 5,614
IT equipment and fixtures | Cost | Right-of-use for operating lease |  |  |
Property, plant and equipment for own use |  |  |
Carrying amount | 13 | 23 | 60
IT equipment and fixtures | Accumulated depreciation | Property, plant and equipment |  |  |
Property, plant and equipment for own use |  |  |
Carrying amount | (3,003) | (3,926) | (4,154)
IT equipment and fixtures | Impairment losses | Property, plant and equipment |  |  |
Property, plant and equipment for own use |  |  |
Carrying amount | (10) | 0 | 0
Furniture and vehicles | Property, plant and equipment |  |  |
Property, plant and equipment for own use |  |  |
Carrying amount | 1,801 | 1,833 | 1,988
Furniture and vehicles | Cost | Property, plant and equipment |  |  |
Property, plant and equipment for own use |  |  |
Carrying amount | 5,548 | 4,963 | 5,412
Furniture and vehicles | Cost | Right-of-use for operating lease |  |  |
Property, plant and equipment for own use |  |  |
Carrying amount | 7 | 13 | 19
Furniture and vehicles | Accumulated depreciation | Property, plant and equipment |  |  |
Property, plant and equipment for own use |  |  |
Carrying amount | (3,746) | (3,130) | (3,424)
Furniture and vehicles | Impairment losses | Property, plant and equipment |  |  |
Property, plant and equipment for own use |  |  |
Carrying amount | (1) | 0 | 0
Construction in progress and other items | Property, plant and equipment |  |  |
Property, plant and equipment for own use |  |  |
Carrying amount | 267 | 202 | 151
Construction in progress and other items | Cost | Property, plant and equipment |  |  |
Property, plant and equipment for own use |  |  |
Carrying amount | 322 | 297 | 244
Construction in progress and other items | Cost | Right-of-use for operating lease |  |  |
Property, plant and equipment for own use |  |  |
Carrying amount | 0 | 0 | 0
Construction in progress and other items | Accumulated depreciation | Property, plant and equipment |  |  |
Property, plant and equipment for own use |  |  |
Carrying amount | (21) | (47) | (49)
Construction in progress and other items | Impairment losses | Property, plant and equipment |  |  |
Property, plant and equipment for own use |  |  |
Carrying amount | € (34) | € (48) | € (44)

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- Definition The amount of property, plant and equipment including right-of-use assets whose underlying assets would be presented as property, plant and equipment if they were owned. [Refer: Property, plant and equipment; Right-of-use assets] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 16 -IssueDate 2025-01-01 -Paragraph 73 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2025-en-r&anchor=para_73_e&doctype=Standard -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2025-01-01 -Paragraph 47 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2025-en-r&anchor=para_47_a&doctype=Standard -URIDate 2025-03-27 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Note Expiry date 2027-01-01 -Name IAS -Number 1 -IssueDate 2025-01-01 -Paragraph 54 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_54_a&doctype=Standard -URIDate 2025-03-27 + Details
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