Trust Pass-Through Securities - Summary of Trust Pass-through Securities (Detail) - EUR (€) € in Millions |
12 Months Ended | |||
|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
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| Disclosure of trust pass-through securities [line items] | ||||
| Trust pass-through securities | € 99 | € 113 | ||
| Fair value | € 118 | 133 | ||
| USD 225 million [member] | ||||
| Disclosure of trust pass-through securities [line items] | ||||
| Coupon rate | [1] | 7.65% | ||
| Coupon date | [1] | Semi-annually, December 1 | ||
| Year of issue | [1] | 1996 | ||
| Year of maturity | [1] | 2026 | ||
| Trust pass-through securities | [1] | € 57 | 66 | |
| USD 190 million [member] | ||||
| Disclosure of trust pass-through securities [line items] | ||||
| Coupon rate | [1] | 7.625% | ||
| Coupon date | [1] | Semi-annually, November 15 | ||
| Year of issue | [1] | 1997 | ||
| Year of maturity | [1] | 2037 | ||
| Trust pass-through securities | [1] | € 42 | € 47 | |
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