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Provisions - Schedule of funding status of the defined benefit obligations (Details) - Spain - EUR (€) € in Millions | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | --- | ---
Post-employment plans |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
To current employees | € 34 | € 49 | € 51 |
Vested obligations to retired employees | 1,610 | 1,850 | 1,936 |
To pre-retirees employees |  | 0 | 0 |
Long-service bonuses and other benefits |  | 0 | 0 |
Present value of the obligations | 1,644 | 1,899 | 1,987 |
Less - Fair value of plan assets | 1,058 | 1,234 | 1,235 |
Provisions - Provisions for pensions | 586 | 665 | 752 |
Internal provisions for pensions | 535 | 593 | 677 |
Net pension assets | (13) | (6) | (14) |
Insurance contracts linked to pensions (note 14) | 67 | 81 | 93 | € 104
Unrecognised net assets for pensions | (3) | (3) | (4) |
Other similar obligations |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
To current employees | 0 | 0 | 0 |
Vested obligations to retired employees | 0 | 0 | 0 |
To pre-retirees employees | 919 | 844 | 812 |
Long-service bonuses and other benefits | 11 | 13 | 12 |
Present value of the obligations | 930 | 857 | 824 |
Less - Fair value of plan assets | 3 | 5 | 7 |
Provisions - Provisions for pensions | 927 | 852 | 817 |
Internal provisions for pensions | 927 | 852 | 817 |
Net pension assets | 0 | 0 | 0 |
Insurance contracts linked to pensions (note 14) | 0 | 0 | 0 | € 0
Unrecognised net assets for pensions | € 0 | € 0 | € 0 |

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- Definition The present value, without deducting any plan assets, of expected future payments required to settle the obligation resulting from employee service in the current and prior periods. [Refer: Plan assets, at fair value] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2025-01-01 -Paragraph 57 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2025-en-r&anchor=para_57_a&doctype=Standard -URIDate 2025-03-27 + Details
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- Definition The fair value of defined benefit plan assets. Plan assets comprise assets held by a long-term employee benefit fund and qualifying insurance policies. [Refer: At fair value [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2025-01-01 -Paragraph 57 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2025-en-r&anchor=para_57_a&doctype=Standard -URIDate 2025-03-27 + Details
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