Defined Benefit Plans - Summary of Breakdown of Plan Assets for Retirement of Benefit Plans (Detail) - EUR (€) € in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
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| Disclosure of fair value of plan assets [Line Items] | ||
| Debt instrument | € 900 | € 869 |
| Derivatives | (30) | (183) |
| Investment funds | 1,625 | 2,027 |
| Other | 350 | 410 |
| On December 31 | € 2,845 | € 3,123 |
| Debt instrument | 32.00% | 28.00% |
| Derivatives | (1.00%) | (6.00%) |
| Investment funds | 57.00% | 65.00% |
| Other | 12.00% | 13.00% |
| On December 31 | 100.00% | 100.00% |
| Quoted Plan Assets [member] | ||
| Disclosure of fair value of plan assets [Line Items] | ||
| Debt instrument | € 702 | € 594 |
| Derivatives | 0 | 0 |
| Investment funds | 0 | 0 |
| Other | 0 | 0 |
| On December 31 | 702 | 594 |
| Unquoted plan assets [member] | ||
| Disclosure of fair value of plan assets [Line Items] | ||
| Debt instrument | 198 | 275 |
| Derivatives | (30) | (183) |
| Investment funds | 1,625 | 2,027 |
| Other | 350 | 410 |
| On December 31 | € 2,144 | € 2,529 |
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- Definition Percentage Contributed To Fair Value Of Plan Assets No definition available.
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- Definition The amount of assets held by retirement benefit plans. [Refer: Defined benefit plans [domain]] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount instruments representing debt (rather than equity) contribute to the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [domain]] Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The percentage instruments representing debt (rather than equity) contribute to the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [domain]] [Contrast: Debt instruments, amount contributed to fair value of plan assets] Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The amount derivatives contribute to the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [domain]; Derivatives [member]] Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The percentage derivatives contribute to the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [domain]] [Contrast: Derivatives, amount contributed to fair value of plan assets] Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. No definition available.
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- Definition The amount investment funds contribute to the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [domain]; Investment funds [member]] Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The percentage investment funds contribute to the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [domain]; Investment funds [member]] [Contrast: Investment funds, amount contributed to fair value of plan assets] Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The amount other types of assets not separately disclosed contribute to the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [domain]] Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The percentage other types of assets not separately disclosed contribute to the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [domain]] [Contrast: Other assets, amount contributed to fair value of plan assets] Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Details
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