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v3.26.1

Other equity instruments and own shares (Details) - EUR (€) € / shares in Units, € in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Sep. 08, 2017
Disclosure Of Other Equity Instruments And Own Shares [Line Items] |  |  |  |  |
Fidelity bonds, nominal value |  |  |  |  | € 981
Reserve of equity component of convertible instruments | € 0 | € 0 | € 720 |  | € 686
Equity | € 112,748 | € 107,327 | € 104,241 | € 97,585 |
Share capital (in shares) | 14,689,319,502 | 15,152,492,322 | 16,184,146,059 | 16,794,401,584 |
Treasury shares, held by the group, as a percentage of issued share capital (in percentage) | 0.075% | 0.102% | 1.84% |  |
Purchase of treasury shares (in shares) | 584,363,745 | 930,610,636 |  |  |
Average purchase price of bank shares (in euro per share) | € 6.98 | € 4.34 |  |  |
Treasury shares, number of shares amortized (in shares) | 463,172,820 | 1,031,653,737 |  |  |
Treasury shares, number of shares transferred (in shares) | 125,643,093 | 181,243,113 |  |  |
Average selling price of bank shares (in euro per share) | € 6.48 | € 4.22 |  |  |
Treasury shares, number of shares transferred through donations (in shares) |  | 22,167,105 |  |  |
Net profit from transaction with treasury shares | € 34 | € 8 | € 13 |  |
2023 Program, Second |  |  |  |  |
Disclosure Of Other Equity Instruments And Own Shares [Line Items] |  |  |  |  |
Purchase of treasury shares (in shares) |  | 403,030,171 |  |  |
2024 Program |  |  |  |  |
Disclosure Of Other Equity Instruments And Own Shares [Line Items] |  |  |  |  |
Purchase of treasury shares (in shares) |  | 341,781,250 |  |  |
2024 Program, Second |  |  |  |  |
Disclosure Of Other Equity Instruments And Own Shares [Line Items] |  |  |  |  |
Purchase of treasury shares (in shares) | 267,166,950 |  |  |  |
2025 Program |  |  |  |  |
Disclosure Of Other Equity Instruments And Own Shares [Line Items] |  |  |  |  |
Purchase of treasury shares (in shares) | 196,005,870 |  |  |  |
Other equity instruments |  |  |  |  |
Disclosure Of Other Equity Instruments And Own Shares [Line Items] |  |  |  |  |
Equity | € 273 | € 217 | 195 | € 175 |
(-) Own shares |  |  |  |  |
Disclosure Of Other Equity Instruments And Own Shares [Line Items] |  |  |  |  |
Equity | € (96) | € (68) | € (1,078) | € (675) |
Share capital (in shares) | 11,077,291 | 15,529,459 | 297,815,673 |  |

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