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Note 25 Defined benefits (Details) - EUR (€) € in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Present value of defined benefit obligation [member] |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Net assets available for benefits at beginning of period |  | € 7,348 | € 8,116 | € 7,585
Current service cost, defined benefit plans |  | 53 | 53 | 52
Increase (decrease) in net defined benefit liability (asset) resulting from interest expense (income) |  | 253 | 261 | 290
Decrease (increase) in net defined benefit liability (asset) resulting from contributions to plan |  | 5 | 4 | 4
Contributions to plan by employer, net defined benefit liability (asset) |  | 0 | 0 | 0
Increase (decrease) in net defined benefit liability (asset) resulting from past service cost | [1] | 75 | 219 | 210
Decrease (increase) in net defined benefit liability (asset) resulting from gain (loss) on remeasurement in other comprehensive income |  | (406) | 364 | 783
Decrease (increase) in net defined benefit liability (asset) resulting from return on plan assets excluding interest income or expense | [2] | 0 | 0 | 0
Decrease (increase) in net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in demographic assumptions |  | (121) | 57 | (15)
Decrease (increase) in net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in financial assumptions |  | (259) | 276 | 688
Decrease (increase) in net defined benefit liability (asset) resulting from actuarial gains (losses) arising from experience adjustments |  | (27) | 30 | 110
Decrease (increase) in net defined benefit liability (asset) resulting from payments from plan |  | 765 | 839 | 905
Decrease (increase) in net defined benefit liability (asset) resulting from payments in respect of settlements |  | (1) | 0 | 0
Increase (decrease) in net defined benefit liability (asset) resulting from business combinations and disposals | [3] | (2) | (371) | 15
Increase (decrease) in net defined benefit liability (asset) resulting from changes in foreign exchange rates, net defined benefit liability (asset) |  | (24) | (459) | 63
Conversions to defined contributions |  | 0 | 0 | 0
Increase (decrease) in net defined benefit liability (asset) resulting from other changes |  | 13 | 1 | 19
Net assets available for benefits at end of period |  | 6,547 | 7,348 | 8,116
Plan assets [member] |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Net assets available for benefits at beginning of period |  | 3,092 | 3,493 | 2,839
Current service cost, defined benefit plans |  | 0 | 0 | 0
Increase (decrease) in net defined benefit liability (asset) resulting from interest expense (income) |  | 220 | 219 | 230
Decrease (increase) in net defined benefit liability (asset) resulting from contributions to plan |  | 5 | 4 | 4
Contributions to plan by employer, net defined benefit liability (asset) |  | (4) | (124) | (65)
Increase (decrease) in net defined benefit liability (asset) resulting from past service cost | [1] | 0 | 0 | 0
Decrease (increase) in net defined benefit liability (asset) resulting from gain (loss) on remeasurement in other comprehensive income |  | (184) | 176 | 454
Decrease (increase) in net defined benefit liability (asset) resulting from return on plan assets excluding interest income or expense | [2] | (184) | 176 | 454
Decrease (increase) in net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in demographic assumptions |  | 0 | 0 | 0
Decrease (increase) in net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in financial assumptions |  | 0 | 0 | 0
Decrease (increase) in net defined benefit liability (asset) resulting from actuarial gains (losses) arising from experience adjustments |  | 0 | 0 | 0
Decrease (increase) in net defined benefit liability (asset) resulting from payments from plan |  | 158 | 185 | 187
Decrease (increase) in net defined benefit liability (asset) resulting from payments in respect of settlements |  | (1) | 0 | 0
Increase (decrease) in net defined benefit liability (asset) resulting from business combinations and disposals | [3] | 1 | (327) | 12
Increase (decrease) in net defined benefit liability (asset) resulting from changes in foreign exchange rates, net defined benefit liability (asset) |  | 8 | (409) | 69
Conversions to defined contributions |  | 0 | 0 | 0
Increase (decrease) in net defined benefit liability (asset) resulting from other changes |  | 0 | (3) | 6
Net assets available for benefits at end of period |  | 2,988 | 3,092 | 3,493
Net liability asset [Member] |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Net assets available for benefits at beginning of period |  | 4,256 | 4,622 | 4,746
Current service cost, defined benefit plans |  | 53 | 53 | 52
Increase (decrease) in net defined benefit liability (asset) resulting from interest expense (income) |  | 33 | 42 | 60
Decrease (increase) in net defined benefit liability (asset) resulting from contributions to plan |  | 0 | 0 | 0
Contributions to plan by employer, net defined benefit liability (asset) |  | (4) | (124) | (65)
Increase (decrease) in net defined benefit liability (asset) resulting from past service cost | [1] | 75 | 219 | 210
Decrease (increase) in net defined benefit liability (asset) resulting from gain (loss) on remeasurement in other comprehensive income |  | (223) | 187 | 329
Decrease (increase) in net defined benefit liability (asset) resulting from return on plan assets excluding interest income or expense | [2] | 184 | (176) | (454)
Decrease (increase) in net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in demographic assumptions |  | (121) | 57 | (15)
Decrease (increase) in net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in financial assumptions |  | (259) | 276 | 688
Decrease (increase) in net defined benefit liability (asset) resulting from actuarial gains (losses) arising from experience adjustments |  | (27) | 30 | 110
Decrease (increase) in net defined benefit liability (asset) resulting from payments from plan |  | (608) | (654) | (718)
Decrease (increase) in net defined benefit liability (asset) resulting from payments in respect of settlements |  | 0 | 0 | 0
Increase (decrease) in net defined benefit liability (asset) resulting from business combinations and disposals | [3] | (3) | (44) | 3
Increase (decrease) in net defined benefit liability (asset) resulting from changes in foreign exchange rates, net defined benefit liability (asset) |  | (32) | (50) | (6)
Conversions to defined contributions |  | 0 | 0 | 0
Increase (decrease) in net defined benefit liability (asset) resulting from other changes |  | 13 | 4 | 13
Net assets available for benefits at end of period |  | 3,560 | 4,256 | 4,622
SPAIN | Present value of defined benefit obligation [member] |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Net assets available for benefits at beginning of period |  | 4,288 | 4,592 |
Net assets available for benefits at end of period |  | 3,670 | 4,288 | 4,592
SPAIN | Plan assets [member] |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Net assets available for benefits at beginning of period |  | 249 | 266 |
Net assets available for benefits at end of period |  | 206 | 249 | 266
SPAIN | Net liability asset [Member] |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Net assets available for benefits at beginning of period |  | 4,039 | 4,326 |
Net assets available for benefits at end of period |  | 3,464 | 4,039 | 4,326
MEXICO | Present value of defined benefit obligation [member] |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Net assets available for benefits at beginning of period |  | 2,219 | 2,231 |
Net assets available for benefits at end of period |  | 2,150 | 2,219 | 2,231
MEXICO | Plan assets [member] |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Net assets available for benefits at beginning of period |  | 2,122 | 2,124 |
Net assets available for benefits at end of period |  | 2,149 | 2,122 | 2,124
MEXICO | Net liability asset [Member] |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Net assets available for benefits at beginning of period |  | 97 | 107 |
Net assets available for benefits at end of period |  | 1 | 97 | 107
UNITED STATES | Present value of defined benefit obligation [member] |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Net assets available for benefits at beginning of period |  | 0 | 375 |
Net assets available for benefits at end of period |  | 0 | 0 | 375
UNITED STATES | Plan assets [member] |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Net assets available for benefits at beginning of period |  | 0 | 323 |
Net assets available for benefits at end of period |  | 0 | 0 | 323
UNITED STATES | Net liability asset [Member] |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Net assets available for benefits at beginning of period |  | 0 | 52 |
Net assets available for benefits at end of period |  | 0 | 0 | 52
TURKEY | Present value of defined benefit obligation [member] |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Net assets available for benefits at beginning of period |  | 367 | 444 |
Net assets available for benefits at end of period |  | 272 | 367 | 444
TURKEY | Plan assets [member] |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Net assets available for benefits at beginning of period |  | 282 | 359 |
Net assets available for benefits at end of period |  | 209 | 282 | 359
TURKEY | Net liability asset [Member] |  |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |  |
Net assets available for benefits at beginning of period |  | 85 | 86 |
Net assets available for benefits at end of period |  | € 63 | € 85 | € 86
[1] | (*) Including gains and losses arising from settlements.
[2] | (**) Excluding interest, which is recorded under "Interest income or expense".
[3] | (***) The amount in 2020 in mainly due to the companies in the United States included in the USA Sale (see Notes 1.3, 3 and 21).

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- Definition The decrease (increase) in a net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in demographic assumptions that result in remeasurements of the net defined benefit liability (asset). Demographic assumptions deal with matters such as: (a) mortality; (b) rates of employee turnover, disability and early retirement; (c) the proportion of plan members with dependants who will be eligible for benefits; (d) the proportion of plan members who will select each form of payment option available under the plan terms; and (e) claim rates under medical plans. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2021-01-01 -Paragraph 141 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_141_c_ii&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The decrease (increase) in a net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in financial assumptions that result in remeasurements of the net defined benefit liability (asset). Financial assumptions deal with items such as: (a) the discount rate; (b) benefit levels, excluding any cost of the benefits to be met by employees, and future salary; (c) in the case of medical benefits, future medical costs, including claim handling costs (ie the costs that will be incurred in processing and resolving claims, including legal and adjuster's fees); and (d) taxes payable by the plan on contributions relating to service before the reporting date or on benefits resulting from that service. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2021-01-01 -Paragraph 141 -Subparagraph c -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_141_c_iii&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The decrease (increase) in a net defined benefit liability (asset) resulting from actuarial gains (losses) arising from experience adjustments that result in remeasurements of the net defined benefit liability (asset). Experience adjustments deal with the effects of differences between the previous actuarial assumptions and what has actually occurred. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2021-01-01 -Paragraph 141 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_141_c&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The amount of assets of a retirement benefit plan less liabilities other than the actuarial present value of promised retirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 26 -IssueDate 2021-01-01 -Paragraph 35 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=26&code=ifrs-tx-2021-en-r&anchor=para_35_a&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The decrease (increase) in net defined benefit liability (asset) resulting from contributions to a defined benefit plan by the employer. [Refer: Net defined benefit liability (asset); Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2021-01-01 -Paragraph 141 -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_141_f&doctype=Standard -URIDate 2021-03-24 + Details
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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 [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2021-01-01 -Paragraph 141 -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_141_f&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The expense of employee service in the current period arising from defined benefit plans. [Refer: Post-employment benefit expense in profit or loss, defined benefit plans] [Contrast: Increase in net defined benefit liability (asset) resulting from current service cost] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2021-01-01 -Paragraph 135 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_135_b&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The decrease (increase) in a net defined benefit liability (asset) resulting from the remeasurement of that net defined benefit liability (asset). [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2021-01-01 -Paragraph 141 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_141_c&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from business combinations and disposals. [Refer: Business combinations [member]; Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2021-01-01 -Paragraph 141 -Subparagraph h -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_141_h&doctype=Standard -URIDate 2021-03-24 + 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 2021-01-01 -Paragraph 141 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_141_e&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from changes that the entity does not separately disclose in the same statement or note. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2021-01-01 -Paragraph 141 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_141&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from the passage of time. [Refer: Interest expense; Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2021-01-01 -Paragraph 141 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_141_b&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from past service cost. Past service cost is the change in the present value of the defined benefit obligation for employee service in prior periods, resulting from a plan amendment (the introduction or withdrawal of, or changes to, a defined benefit plan) or a curtailment (a significant reduction by the entity in the number of employees covered by a plan). [Refer: Net defined benefit liability (asset); Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2021-01-01 -Paragraph 141 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_141_d&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The decrease (increase) in the net defined benefit liability (asset) resulting from the return on plan assets, excluding amounts included in interest income or expense. The return on plan assets is interest, dividends and other revenue derived from the plan assets, together with realised and unrealised gains or losses on the plan assets, less any costs of managing plan assets and less any tax payable by the plan itself, other than tax included in the actuarial assumptions used to measure the present value of the defined benefit obligation. [Refer: Plan assets [member]; Net defined benefit liability (asset); Actuarial assumptions [member]; Increase (decrease) in net defined benefit liability (asset) resulting from interest expense (income)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2021-01-01 -Paragraph 141 -Subparagraph c -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_141_c_i&doctype=Standard -URIDate 2021-03-24 + Details
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