Total Net Investment Result - Summary of Insurance Net Investment Result (Parenthetical) (Detail) - EUR (€) € in Millions |
6 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
[2] | ||||||
| Disclosure Of Insurance And Reinsurance Net Investment Result [Line Items] | ||||||||
| Insurance Net Investment Result | € (29) | [1] | € 843 | |||||
| Insurance contracts issued [member] | ||||||||
| Disclosure Of Insurance And Reinsurance Net Investment Result [Line Items] | ||||||||
| Insurance finance income (expenses) | (6,259) | [1] | € (5,530) | |||||
| Insurance contracts issued [member] | Investment Contracts Without Direct Participating Features [Member] | ||||||||
| Disclosure Of Insurance And Reinsurance Net Investment Result [Line Items] | ||||||||
| Insurance Net Investment Result | (2) | |||||||
| Insurance finance income (expenses) | € (2) | |||||||
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