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Provisions - Schedule of changes in fair value of plan assets (Details) - Spain - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Post-employment plans |  |  |
Insurance contracts linked to pensions |  |  |
Fair value of insurance contracts linked to pensions at beginning of year | € 81 | € 93 | € 104
Incorporation of Group companies, net | 0 | 0 | 0
Expected return on insurance contracts linked to pensions | 3 | 3 | 4
Benefits paid | (12) | (13) | (15)
Paid premiums | 0 | 0 | 0
Actuarial gains/(losses) | (5) | (2) | 0
Fair value of insurance contracts linked to pensions at end of year | 67 | 81 | 93
Other similar obligations |  |  |
Insurance contracts linked to pensions |  |  |
Fair value of insurance contracts linked to pensions at beginning of year | 0 | 0 | 0
Incorporation of Group companies, net | 0 | 0 | 0
Expected return on insurance contracts linked to pensions | 0 | 0 | 0
Benefits paid | 0 | 0 | 0
Paid premiums | 0 | 0 | 0
Actuarial gains/(losses) | 0 | 0 | 0
Fair value of insurance contracts linked to pensions at end of year | 0 | 0 | 0
Plan assets | Post-employment plans |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Fair value of plan assets at beginning of year | 1,234 | 1,235 | 861
Incorporation of Group companies, net | 0 | 0 | 0
Expected return on plan assets | 40 | 43 | 40
Gains/(losses) on settlements | 7 | 0 | 0
Benefits paid | (144) | (124) | (89)
Contributions/(surrenders) | (7) | 58 | 409
Actuarial gains/(losses) | (64) | 27 | 25
Exchange differences and other items | (8) | (5) | (11)
Fair value of plan assets at end of year | 1,058 | 1,234 | 1,235
Plan assets | Other similar obligations |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Fair value of plan assets at beginning of year | 5 | 7 | 8
Incorporation of Group companies, net | 0 | 0 | 0
Expected return on plan assets | 0 | 0 | 0
Gains/(losses) on settlements | 0 | 0 | 0
Benefits paid | (2) | (2) | (2)
Contributions/(surrenders) | 0 | 0 | 0
Actuarial gains/(losses) | 0 | 0 | 0
Exchange differences and other items | 0 | 0 | 1
Fair value of plan assets at end of year | € 3 | € 5 | € 7

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- Definition The decrease (increase) in the net defined benefit liability (asset) resulting from contributions to a defined benefit plan. [Refer: Net defined benefit liability (asset); Defined benefit plans [domain]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2025-01-01 -Paragraph 141 -Subparagraph f -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2025-en-r&anchor=para_141_f&doctype=Standard -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 207 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_207_e&doctype=Standard -URIDate 2025-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 207 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_207_e&doctype=Standard -URIDate 2025-03-27 + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from changes in foreign exchange rates. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2025-01-01 -Paragraph 141 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2025-en-r&anchor=para_141_e&doctype=Standard -URIDate 2025-03-27 + Details
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- Definition The amount of deficit or surplus in a defined benefit plan, adjusted for any effect of limiting a net defined benefit asset to the asset ceiling. [Refer: Defined benefit plans [domain]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2025-01-01 -Paragraph 140 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2025-en-r&anchor=para_140_a&doctype=Standard -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 206 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_206_a&doctype=Standard -URIDate 2025-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 206 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_206_a&doctype=Standard -URIDate 2025-03-27 + Details
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- Definition The decrease (increase) in the net defined benefit liability (asset) resulting from payments from the plan. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2025-01-01 -Paragraph 141 -Subparagraph g -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2025-en-r&anchor=para_141_g&doctype=Standard -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 207 -Subparagraph f -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_207_f&doctype=Standard -URIDate 2025-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 207 -Subparagraph f -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_207_f&doctype=Standard -URIDate 2025-03-27 + Details
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- Definition The decrease (increase) in a net defined benefit liability (asset) resulting from actuarial gains (losses) that result in remeasurements of the net defined benefit liability (asset). + References No definition available. + Details
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- Definition Expected return on insurance contracts linked to pensions. + References No definition available. + Details
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- Definition Gains (Losses) On Liquidation, Net Defined Benefit Liability (Asset) + References No definition available. + Details
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- Definition Insurance contracts linked to pensions + References No definition available. + Details
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- Definition Actuarial gains losses from insurance contracts linked to pensions. + References No definition available. + Details
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- Definition Increase in insurance contracts linked to pensions from incorporation of entities. + References No definition available. + Details
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- Definition Benefits paid from insurance contracts linked to pensions. + References No definition available. + Details
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- Definition Insurance contracts linked to pensions, increase in plan assets due to premiums paid. + References No definition available. + Details
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