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Risk management - Schedule of exposure and impairment losses by stage, by entity (Details) € in Millions | Dec. 31, 2025 EUR (€) tranches | Dec. 31, 2024 EUR (€) | Dec. 31, 2023 EUR (€) | Dec. 31, 2022 EUR (€)
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Disclosure of credit risk exposure [line items] |  |  |  |
Number of tranches | tranches | 4 |  |  |
Maximum exposure to credit risk | € 888,496 | € 908,963 | € 914,491 |
Financial assets | (300,026) | (283,497) | (243,203) |
Customers |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Financial assets | (1,037,288) | (1,054,069) | (1,036,349) |
Accumulated impairment |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Financial assets | 520 | 349 | 286 |
Accumulated impairment | Customers |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Financial assets | 21,158 | 22,125 | 22,788 |
Accumulated impairment | Financial assets at amortised cost and financial assets at fair value through other comprehensive income |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Financial assets | 21,158 | 22,125 | 22,788 | € 22,684
Accumulated impairment | Financial assets at amortised cost and financial assets at fair value through other comprehensive income | Customers |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Financial assets | € 21,158 | 22,125 | 22,788 | 22,684
Spain |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Number of tranches | tranches | 4 |  |  |
Maximum exposure to credit risk | € 201,013 | 198,936 | 205,994 |
Spain | Accumulated impairment |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Financial assets | 1,086 |  |  |
Spain | Accumulated impairment | Financial assets at amortised cost and financial assets at fair value through other comprehensive income | Customers |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Financial assets | 3,069 | 3,863 | 3,922 |
Financial instruments not credit-impaired | Accumulated impairment | Financial assets at amortised cost and financial assets at fair value through other comprehensive income |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Financial assets | 7,631 | 8,037 | 8,550 |
Financial instruments credit-impaired | Accumulated impairment | Financial assets at amortised cost and financial assets at fair value through other comprehensive income |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Financial assets | 13,527 | 14,088 | 14,238 |
Stage 1 | Financial instruments not credit-impaired |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 779,109 | 800,360 | 807,228 |
Stage 1 | Financial instruments not credit-impaired | Accumulated impairment | Financial assets at amortised cost and financial assets at fair value through other comprehensive income | Customers |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Financial assets | 3,000 | 3,293 | 3,596 | 3,626
Stage 1 | Financial instruments not credit-impaired | Spain |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 183,686 | 179,041 | 183,324 |
Stage 1 | Financial instruments not credit-impaired | Spain | Accumulated impairment | Financial assets at amortised cost and financial assets at fair value through other comprehensive income | Customers |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Financial assets | 382 | 340 | 300 |
Stage 2 and 3 | Financial instruments not credit-impaired |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 78,112 | 77,330 | 74,808 |
Stage 2 and 3 | Financial instruments not credit-impaired | Accumulated impairment | Financial assets at amortised cost and financial assets at fair value through other comprehensive income | Customers |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Financial assets | 4,631 | 4,744 | 4,954 | 5,127
Stage 2 and 3 | Financial instruments not credit-impaired | Spain |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 11,566 | 13,277 | 15,134 |
Stage 2 and 3 | Financial instruments not credit-impaired | Spain | Accumulated impairment | Financial assets at amortised cost and financial assets at fair value through other comprehensive income | Customers |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Financial assets | 483 | 570 | 663 |
Stage 2 and 3 | Financial instruments credit-impaired |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 31,275 | 31,273 | 32,455 |
Stage 2 and 3 | Financial instruments credit-impaired | Accumulated impairment | Financial assets at amortised cost and financial assets at fair value through other comprehensive income | Customers |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Financial assets | 13,527 | 14,088 | 14,238 | € 13,931
Stage 2 and 3 | Financial instruments credit-impaired | Spain |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 5,761 | 6,618 | 7,536 |
Stage 2 and 3 | Financial instruments credit-impaired | Spain | Accumulated impairment | Financial assets at amortised cost and financial assets at fair value through other comprehensive income | Customers |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Financial assets | 2,204 | 2,953 | 2,959 |
From AAA to AA- |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 115,038 | 104,958 | 143,029 |
From AAA to AA- | Spain |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 35,578 | 35,457 | 46,875 |
From AAA to AA- | Stage 1 | Financial instruments not credit-impaired |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 112,795 | 102,394 | 140,792 |
From AAA to AA- | Stage 1 | Financial instruments not credit-impaired | Spain |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 35,407 | 35,347 | 46,827 |
From AAA to AA- | Stage 2 and 3 | Financial instruments not credit-impaired |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 2,243 | 2,564 | 2,237 |
From AAA to AA- | Stage 2 and 3 | Financial instruments not credit-impaired | Spain |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 171 | 110 | 48 |
From AAA to AA- | Stage 2 and 3 | Financial instruments credit-impaired |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 0 | 0 | 0 |
From AAA to AA- | Stage 2 and 3 | Financial instruments credit-impaired | Spain |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 0 | 0 |  |
From A+ to BB |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 381,579 | 426,837 | 417,930 |
From A+ to BB | Spain |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 110,454 | 105,321 | 101,859 |
From A+ to BB | Stage 1 | Financial instruments not credit-impaired |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 367,186 | 411,158 | 404,184 |
From A+ to BB | Stage 1 | Financial instruments not credit-impaired | Spain |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 109,001 | 104,197 | 101,079 |
From A+ to BB | Stage 2 and 3 | Financial instruments not credit-impaired |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 14,393 | 15,678 | 13,746 |
From A+ to BB | Stage 2 and 3 | Financial instruments not credit-impaired | Spain |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 1,453 | 1,124 | 780 |
From A+ to BB | Stage 2 and 3 | Financial instruments credit-impaired |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 0 | 0 | 0 |
From A+ to BB | Stage 2 and 3 | Financial instruments credit-impaired | Spain |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 0 | 0 |  |
From BB- to B- |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 335,376 | 318,878 | 290,599 |
From BB- to B- | Spain |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 45,351 | 46,257 | 43,694 |
From BB- to B- | Stage 1 | Financial instruments not credit-impaired |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 291,014 | 276,422 | 250,619 |
From BB- to B- | Stage 1 | Financial instruments not credit-impaired | Spain |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 37,089 | 37,413 | 33,905 |
From BB- to B- | Stage 2 and 3 | Financial instruments not credit-impaired |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 44,363 | 42,456 | 39,979 |
From BB- to B- | Stage 2 and 3 | Financial instruments not credit-impaired | Spain |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 8,262 | 8,844 | 9,789 |
From BB- to B- | Stage 2 and 3 | Financial instruments credit-impaired |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 0 | 0 | 0 |
From BB- to B- | Stage 2 and 3 | Financial instruments credit-impaired | Spain |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 0 | 0 |  |
CCC and below |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 56,503 | 58,291 | 62,933 |
CCC and below | Spain |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 9,630 | 11,901 | 13,566 |
CCC and below | Stage 1 | Financial instruments not credit-impaired |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 8,114 | 10,385 | 11,633 |
CCC and below | Stage 1 | Financial instruments not credit-impaired | Spain |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 2,189 | 2,084 | 1,513 |
CCC and below | Stage 2 and 3 | Financial instruments not credit-impaired |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 17,114 | 16,633 | 18,846 |
CCC and below | Stage 2 and 3 | Financial instruments not credit-impaired | Spain |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 1,680 | 3,199 | 4,517 |
CCC and below | Stage 2 and 3 | Financial instruments credit-impaired |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 31,275 | 31,273 | 32,455 |
CCC and below | Stage 2 and 3 | Financial instruments credit-impaired | Spain |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | € 5,761 | 6,618 | 7,536 |
Santander UK plc |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Number of tranches | tranches | 4 |  |  |
Maximum exposure to credit risk | € 222,346 | 236,850 | 235,344 |
Santander UK plc | Accumulated impairment | Financial assets at amortised cost and financial assets at fair value through other comprehensive income | Customers |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Financial assets | 855 | 967 | 1,066 |
Santander UK plc | Stage 1 | Financial instruments not credit-impaired |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 200,576 | 209,588 | 205,708 |
Santander UK plc | Stage 1 | Financial instruments not credit-impaired | Accumulated impairment | Financial assets at amortised cost and financial assets at fair value through other comprehensive income | Customers |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Financial assets | 163 | 166 | 172 |
Santander UK plc | Stage 2 and 3 | Financial instruments not credit-impaired |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 19,295 | 23,970 | 26,118 |
Santander UK plc | Stage 2 and 3 | Financial instruments not credit-impaired | Accumulated impairment | Financial assets at amortised cost and financial assets at fair value through other comprehensive income | Customers |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Financial assets | 319 | 401 | 498 |
Santander UK plc | Stage 2 and 3 | Financial instruments credit-impaired |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 2,475 | 3,292 | 3,518 |
Santander UK plc | Stage 2 and 3 | Financial instruments credit-impaired | Accumulated impairment | Financial assets at amortised cost and financial assets at fair value through other comprehensive income | Customers |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Financial assets | 373 | 400 | 396 |
Santander UK plc | From AAA to AA- |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 30,344 | 33,196 | 47,509 |
Santander UK plc | From AAA to AA- | Stage 1 | Financial instruments not credit-impaired |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 29,963 | 32,012 | 46,236 |
Santander UK plc | From AAA to AA- | Stage 2 and 3 | Financial instruments not credit-impaired |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 381 | 1,184 | 1,273 |
Santander UK plc | From AAA to AA- | Stage 2 and 3 | Financial instruments credit-impaired |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 0 | 0 | 0 |
Santander UK plc | From A+ to BB |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 162,510 | 170,886 | 156,734 |
Santander UK plc | From A+ to BB | Stage 1 | Financial instruments not credit-impaired |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 152,981 | 159,970 | 145,884 |
Santander UK plc | From A+ to BB | Stage 2 and 3 | Financial instruments not credit-impaired |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 9,529 | 10,916 | 10,850 |
Santander UK plc | From A+ to BB | Stage 2 and 3 | Financial instruments credit-impaired |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 0 | 0 | 0 |
Santander UK plc | From BB- to B- |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 26,400 | 28,769 | 27,583 |
Santander UK plc | From BB- to B- | Stage 1 | Financial instruments not credit-impaired |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 17,630 | 17,594 | 13,588 |
Santander UK plc | From BB- to B- | Stage 2 and 3 | Financial instruments not credit-impaired |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 8,770 | 11,175 | 13,995 |
Santander UK plc | From BB- to B- | Stage 2 and 3 | Financial instruments credit-impaired |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 0 | 0 | 0 |
Santander UK plc | CCC and below |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 3,092 | 3,999 | 3,518 |
Santander UK plc | CCC and below | Stage 1 | Financial instruments not credit-impaired |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 2 | 12 | 0 |
Santander UK plc | CCC and below | Stage 2 and 3 | Financial instruments not credit-impaired |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 615 | 695 | 0 |
Santander UK plc | CCC and below | Stage 2 and 3 | Financial instruments credit-impaired |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | € 2,475 | 3,292 | 3,518 |
Santander Bank, National Association | US |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Number of tranches | tranches | 4 |  |  |
Santander Bank, National Association | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | € 45,741 | 54,243 | 55,984 |
Santander Bank, National Association | US | Total North America | Accumulated impairment | Financial assets at amortised cost and financial assets at fair value through other comprehensive income |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Financial assets | 804 | 838 | 885 |
Santander Bank, National Association | Stage 1 | Financial instruments not credit-impaired | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 38,511 | 47,569 | 50,666 |
Santander Bank, National Association | Stage 1 | Financial instruments not credit-impaired | US | Total North America | Accumulated impairment | Financial assets at amortised cost and financial assets at fair value through other comprehensive income |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Financial assets | 277 | 292 | 409 |
Santander Bank, National Association | Stage 2 and 3 | Financial instruments not credit-impaired | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 6,072 | 5,544 | 4,424 |
Santander Bank, National Association | Stage 2 and 3 | Financial instruments not credit-impaired | US | Total North America | Accumulated impairment | Financial assets at amortised cost and financial assets at fair value through other comprehensive income |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Financial assets | 325 | 364 | 335 |
Santander Bank, National Association | Stage 2 and 3 | Financial instruments credit-impaired | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 1,158 | 1,130 | 894 |
Santander Bank, National Association | Stage 2 and 3 | Financial instruments credit-impaired | US | Total North America | Accumulated impairment | Financial assets at amortised cost and financial assets at fair value through other comprehensive income |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Financial assets | 202 | 182 | 141 |
Santander Bank, National Association | From AAA to AA- | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 1,646 | 4,492 | 4,910 |
Santander Bank, National Association | From AAA to AA- | Stage 1 | Financial instruments not credit-impaired | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 1,622 | 4,215 | 4,834 |
Santander Bank, National Association | From AAA to AA- | Stage 2 and 3 | Financial instruments not credit-impaired | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 24 | 277 | 76 |
Santander Bank, National Association | From AAA to AA- | Stage 2 and 3 | Financial instruments credit-impaired | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 0 | 0 | 0 |
Santander Bank, National Association | From A+ to BB | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 8,080 | 22,352 | 20,927 |
Santander Bank, National Association | From A+ to BB | Stage 1 | Financial instruments not credit-impaired | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 7,352 | 21,422 | 20,468 |
Santander Bank, National Association | From A+ to BB | Stage 2 and 3 | Financial instruments not credit-impaired | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 728 | 930 | 459 |
Santander Bank, National Association | From A+ to BB | Stage 2 and 3 | Financial instruments credit-impaired | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 0 | 0 | 0 |
Santander Bank, National Association | From BB- to B- | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 33,217 | 25,754 | 28,751 |
Santander Bank, National Association | From BB- to B- | Stage 1 | Financial instruments not credit-impaired | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 28,758 | 21,899 | 25,312 |
Santander Bank, National Association | From BB- to B- | Stage 2 and 3 | Financial instruments not credit-impaired | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 4,459 | 3,855 | 3,439 |
Santander Bank, National Association | From BB- to B- | Stage 2 and 3 | Financial instruments credit-impaired | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 0 | 0 | 0 |
Santander Bank, National Association | CCC and below | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 2,798 | 1,645 | 1,396 |
Santander Bank, National Association | CCC and below | Stage 1 | Financial instruments not credit-impaired | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 779 | 33 | 52 |
Santander Bank, National Association | CCC and below | Stage 2 and 3 | Financial instruments not credit-impaired | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 861 | 482 | 450 |
Santander Bank, National Association | CCC and below | Stage 2 and 3 | Financial instruments credit-impaired | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | € 1,158 | 1,130 | 894 |
Santander Consumer USA Holdings Inc. | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Number of tranches | tranches | 4 |  |  |
Maximum exposure to credit risk | € 25,204 | 30,669 | 28,877 |
Santander Consumer USA Holdings Inc. | US | Total North America | Accumulated impairment | Financial assets at amortised cost and financial assets at fair value through other comprehensive income | Customers |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Financial assets | 3,017 | 3,544 | 3,328 |
Santander Consumer USA Holdings Inc. | Stage 1 | Financial instruments not credit-impaired | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 13,798 | 20,263 | 18,973 |
Santander Consumer USA Holdings Inc. | Stage 1 | Financial instruments not credit-impaired | US | Total North America | Accumulated impairment | Financial assets at amortised cost and financial assets at fair value through other comprehensive income | Customers |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Financial assets | 419 | 630 | 597 |
Santander Consumer USA Holdings Inc. | Stage 2 and 3 | Financial instruments not credit-impaired | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 5,818 | 4,677 | 4,632 |
Santander Consumer USA Holdings Inc. | Stage 2 and 3 | Financial instruments not credit-impaired | US | Total North America | Accumulated impairment | Financial assets at amortised cost and financial assets at fair value through other comprehensive income | Customers |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Financial assets | 910 | 1,006 | 1,019 |
Santander Consumer USA Holdings Inc. | Stage 2 and 3 | Financial instruments credit-impaired | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 5,588 | 5,729 | 5,272 |
Santander Consumer USA Holdings Inc. | Stage 2 and 3 | Financial instruments credit-impaired | US | Total North America | Accumulated impairment | Financial assets at amortised cost and financial assets at fair value through other comprehensive income | Customers |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Financial assets | 1,688 | 1,908 | 1,712 |
Santander Consumer USA Holdings Inc. | From AAA to AA- | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 0 | 0 | 0 |
Santander Consumer USA Holdings Inc. | From AAA to AA- | Stage 1 | Financial instruments not credit-impaired | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 0 | 0 | 0 |
Santander Consumer USA Holdings Inc. | From AAA to AA- | Stage 2 and 3 | Financial instruments not credit-impaired | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 0 | 0 | 0 |
Santander Consumer USA Holdings Inc. | From AAA to AA- | Stage 2 and 3 | Financial instruments credit-impaired | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 0 | 0 | 0 |
Santander Consumer USA Holdings Inc. | From A+ to BB | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 54 | 202 | 99 |
Santander Consumer USA Holdings Inc. | From A+ to BB | Stage 1 | Financial instruments not credit-impaired | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 54 | 202 | 99 |
Santander Consumer USA Holdings Inc. | From A+ to BB | Stage 2 and 3 | Financial instruments not credit-impaired | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 0 | 0 | 0 |
Santander Consumer USA Holdings Inc. | From A+ to BB | Stage 2 and 3 | Financial instruments credit-impaired | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 0 | 0 | 0 |
Santander Consumer USA Holdings Inc. | From BB- to B- | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 11,114 | 13,253 | 12,515 |
Santander Consumer USA Holdings Inc. | From BB- to B- | Stage 1 | Financial instruments not credit-impaired | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 10,167 | 12,802 | 12,120 |
Santander Consumer USA Holdings Inc. | From BB- to B- | Stage 2 and 3 | Financial instruments not credit-impaired | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 947 | 451 | 395 |
Santander Consumer USA Holdings Inc. | From BB- to B- | Stage 2 and 3 | Financial instruments credit-impaired | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 0 | 0 | 0 |
Santander Consumer USA Holdings Inc. | CCC and below | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 14,036 | 17,214 | 16,263 |
Santander Consumer USA Holdings Inc. | CCC and below | Stage 1 | Financial instruments not credit-impaired | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 3,577 | 7,259 | 6,754 |
Santander Consumer USA Holdings Inc. | CCC and below | Stage 2 and 3 | Financial instruments not credit-impaired | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 4,871 | 4,226 | 4,237 |
Santander Consumer USA Holdings Inc. | CCC and below | Stage 2 and 3 | Financial instruments credit-impaired | US | Total North America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | € 5,588 | 5,729 | 5,272 |
Banco Santander (Brasil) S.A. | Brazil | Total South America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Number of tranches | tranches | 4 |  |  |
Maximum exposure to credit risk | € 104,136 | 103,541 | 113,409 |
Banco Santander (Brasil) S.A. | Brazil | Total South America | Accumulated impairment | Financial assets at amortised cost and financial assets at fair value through other comprehensive income | Customers |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Financial assets | 5,992 | 5,313 | 6,338 |
Banco Santander (Brasil) S.A. | Stage 1 | Financial instruments not credit-impaired | Brazil | Total South America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 83,383 | 86,459 | 96,799 |
Banco Santander (Brasil) S.A. | Stage 1 | Financial instruments not credit-impaired | Brazil | Total South America | Accumulated impairment | Financial assets at amortised cost and financial assets at fair value through other comprehensive income | Customers |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Financial assets | 648 | 687 | 722 |
Banco Santander (Brasil) S.A. | Stage 2 and 3 | Financial instruments not credit-impaired | Brazil | Total South America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 13,602 | 10,700 | 9,131 |
Banco Santander (Brasil) S.A. | Stage 2 and 3 | Financial instruments not credit-impaired | Brazil | Total South America | Accumulated impairment | Financial assets at amortised cost and financial assets at fair value through other comprehensive income | Customers |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Financial assets | 1,128 | 860 | 1,078 |
Banco Santander (Brasil) S.A. | Stage 2 and 3 | Financial instruments credit-impaired | Brazil | Total South America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 7,151 | 6,382 | 7,479 |
Banco Santander (Brasil) S.A. | Stage 2 and 3 | Financial instruments credit-impaired | Brazil | Total South America | Accumulated impairment | Financial assets at amortised cost and financial assets at fair value through other comprehensive income | Customers |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Financial assets | 4,216 | 3,766 | 4,538 |
Banco Santander (Brasil) S.A. | From AAA to AA- | Brazil | Total South America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 18,411 | 20,527 | 21,138 |
Banco Santander (Brasil) S.A. | From AAA to AA- | Stage 1 | Financial instruments not credit-impaired | Brazil | Total South America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 16,898 | 19,557 | 20,670 |
Banco Santander (Brasil) S.A. | From AAA to AA- | Stage 2 and 3 | Financial instruments not credit-impaired | Brazil | Total South America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 1,513 | 970 | 468 |
Banco Santander (Brasil) S.A. | From AAA to AA- | Stage 2 and 3 | Financial instruments credit-impaired | Brazil | Total South America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 0 | 0 | 0 |
Banco Santander (Brasil) S.A. | From A+ to BB | Brazil | Total South America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 30,432 | 34,461 | 39,620 |
Banco Santander (Brasil) S.A. | From A+ to BB | Stage 1 | Financial instruments not credit-impaired | Brazil | Total South America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 29,179 | 32,824 | 38,869 |
Banco Santander (Brasil) S.A. | From A+ to BB | Stage 2 and 3 | Financial instruments not credit-impaired | Brazil | Total South America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 1,253 | 1,637 | 751 |
Banco Santander (Brasil) S.A. | From A+ to BB | Stage 2 and 3 | Financial instruments credit-impaired | Brazil | Total South America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 0 | 0 | 0 |
Banco Santander (Brasil) S.A. | From BB- to B- | Brazil | Total South America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 43,124 | 38,940 | 40,284 |
Banco Santander (Brasil) S.A. | From BB- to B- | Stage 1 | Financial instruments not credit-impaired | Brazil | Total South America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 36,089 | 33,655 | 36,107 |
Banco Santander (Brasil) S.A. | From BB- to B- | Stage 2 and 3 | Financial instruments not credit-impaired | Brazil | Total South America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 7,035 | 5,285 | 4,177 |
Banco Santander (Brasil) S.A. | From BB- to B- | Stage 2 and 3 | Financial instruments credit-impaired | Brazil | Total South America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 0 | 0 | 0 |
Banco Santander (Brasil) S.A. | CCC and below | Brazil | Total South America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 12,169 | 9,613 | 12,367 |
Banco Santander (Brasil) S.A. | CCC and below | Stage 1 | Financial instruments not credit-impaired | Brazil | Total South America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 1,217 | 423 | 1,153 |
Banco Santander (Brasil) S.A. | CCC and below | Stage 2 and 3 | Financial instruments not credit-impaired | Brazil | Total South America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | 3,801 | 2,808 | 3,735 |
Banco Santander (Brasil) S.A. | CCC and below | Stage 2 and 3 | Financial instruments credit-impaired | Brazil | Total South America |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Maximum exposure to credit risk | € 7,151 | € 6,382 | € 7,479 |

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