Income Taxes - Summary of Income Tax Related to Components of Other Comprehensive Income (Detail) - EUR (€) € in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
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| Items that will not be reclassified to profit and loss: | |||
| Remeasurements of defined benefit plans | € (4) | € 1 | € 17 |
| Items that will not be reclassified to profit and loss | (4) | 1 | 17 |
| Items that may be reclassified subsequently to profit and loss: | |||
| Unrealized (Gains) / losses on revaluation of FVOCI investments | (419) | 237 | (487) |
| Revaluation reserve - Insurance contracts | 174 | (530) | 397 |
| Revaluation reserve - Reinsurance contracts | (22) | 177 | (126) |
| Changes in cash flow hedging reserve | 49 | 45 | 42 |
| Movement in foreign currency translation and net foreign investment hedging reserve | 0 | 7 | 3 |
| Items that may be reclassified subsequently to profit or loss | (218) | (64) | (171) |
| Total income tax related to items of other comprehensive income | € (222) | € (63) | € (154) |
| X | ||||||||||
- Definition Income tax relating to components of other comprehensive income that will be reclassified to loss or profit. No definition available.
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| X | ||||||||||
- Definition Income tax relating to components of other comprehensive income that will not be reclassified to loss or profit. No definition available.
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| X | ||||||||||
- Definition Income tax relating to gains losses on revaluation of financial assets at fair value through other comprehensive income. No definition available.
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| X | ||||||||||
- Definition income tax relating to gains losses on revaluation of insurance contracts through other comprehensive income. No definition available.
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| X | ||||||||||
- Definition Income tax relating to gains losses on revaluation of reinsurance contracts through other comprehensive income. No definition available.
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| X | ||||||||||
- Definition The amount of income tax relating to amounts recognised in other comprehensive income in relation to cash flow hedges. [Refer: Cash flow hedges [member]; Other comprehensive income] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The amount of income tax relating to amounts recognised in other comprehensive income. [Refer: Other comprehensive income] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition The amount of income tax relating to amounts recognised in other comprehensive income in relation to hedges of net investments in foreign operations. [Refer: Other comprehensive income] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The amount of income tax relating to amounts recognised in other comprehensive income in relation to remeasurements of defined benefit plans. [Refer: Other comprehensive income; Reserve of remeasurements of defined benefit plans; Defined benefit plans [domain]] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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