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Debt securities - Schedule of debt instruments by issuer rating (Details) - EUR (€) € in Millions | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | --- | ---
Debt Instruments |  |  |
Financial assets | € 300,026 | € 283,497 | € 243,203
Financial assets (as a percent) |  | 100.00% | 100.00%
Debt securities |  |  |
Debt Instruments |  |  |
Financial assets | € 300,026 | € 283,497 | € 243,203
Financial assets (as a percent) | 100.00% | 100.00% | 100.00%
Private fixed income |  |  |
Debt Instruments |  |  |
Financial assets | € 63,816 | € 61,831 | € 57,150
Public fixed income |  |  |
Debt Instruments |  |  |
Financial assets | 236,210 | 221,666 | 186,053
AAA | Debt securities |  |  |
Debt Instruments |  |  |
Financial assets | € 25,272 | € 23,329 | € 23,039
Financial assets (as a percent) | 8.42% | 8.23% | 9.47%
AAA | Private fixed income |  |  |
Debt Instruments |  |  |
Financial assets | € 15,952 | € 16,889 | € 15,152
AAA | Public fixed income |  |  |
Debt Instruments |  |  |
Financial assets | 9,320 | 6,440 | 7,887
AA | Debt securities |  |  |
Debt Instruments |  |  |
Financial assets | € 62,049 | € 64,226 | € 51,846
Financial assets (as a percent) | 20.68% | 22.65% | 21.32%
AA | Private fixed income |  |  |
Debt Instruments |  |  |
Financial assets | € 19,598 | € 16,972 | € 15,142
AA | Public fixed income |  |  |
Debt Instruments |  |  |
Financial assets | 42,451 | 47,254 | 36,704
A | Debt securities |  |  |
Debt Instruments |  |  |
Financial assets | € 108,743 | € 97,870 | € 79,287
Financial assets (as a percent) | 36.24% | 34.53% | 32.60%
A | Private fixed income |  |  |
Debt Instruments |  |  |
Financial assets | € 13,206 | € 10,056 | € 11,175
A | Public fixed income |  |  |
Debt Instruments |  |  |
Financial assets | 95,537 | 87,814 | 68,112
BBB | Debt securities |  |  |
Debt Instruments |  |  |
Financial assets | € 56,938 | € 53,383 | € 46,922
Financial assets (as a percent) | 18.98% | 18.83% | 19.29%
BBB | Private fixed income |  |  |
Debt Instruments |  |  |
Financial assets | € 6,872 | € 8,900 | € 7,749
BBB | Public fixed income |  |  |
Debt Instruments |  |  |
Financial assets | 50,066 | 44,483 | 39,173
Below BBB | Debt securities |  |  |
Debt Instruments |  |  |
Financial assets | € 43,888 | € 41,218 | € 38,831
Financial assets (as a percent) | 14.63% | 14.54% | 15.97%
Below BBB | Private fixed income |  |  |
Debt Instruments |  |  |
Financial assets | € 5,052 | € 5,543 | € 4,654
Below BBB | Public fixed income |  |  |
Debt Instruments |  |  |
Financial assets | 38,836 | 35,675 | 34,177
Unrated | Debt securities |  |  |
Debt Instruments |  |  |
Financial assets | € 3,136 | € 3,471 | € 3,278
Financial assets (as a percent) | 1.05% | 1.22% | 1.35%
Unrated | Private fixed income |  |  |
Debt Instruments |  |  |
Financial assets | € 3,136 | € 3,471 | € 3,278
Unrated | Public fixed income |  |  |
Debt Instruments |  |  |
Financial assets | € 0 | € 0 | € 0

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