Employee Benefits - Post-employment Benefit Plans - Breakdown of Benefit Obligation (Detail) - EUR (€) € in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
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|---|---|---|---|---|---|---|---|---|
| Defined benefit obligation related to | ||||||||
| Active plan participants | € 3,927 | € 4,300 | ||||||
| Participants in deferred status | 3,360 | 3,736 | ||||||
| Participants in payment status | 6,828 | 6,975 | ||||||
| Total defined benefit obligation | 14,115 | 15,011 | ||||||
| Fair value of plan assets | € 15,239 | € 16,106 | ||||||
| Funding ratio (in %) | 108.00% | 107.00% | ||||||
| Germany | ||||||||
| Defined benefit obligation related to | ||||||||
| Active plan participants | € 2,816 | € 3,084 | ||||||
| Participants in deferred status | 1,673 | 1,805 | ||||||
| Participants in payment status | 4,860 | 5,075 | ||||||
| Total defined benefit obligation | 9,349 | 9,964 | ||||||
| Fair value of plan assets | € 9,632 | € 10,237 | ||||||
| Funding ratio (in %) | 103.00% | 103.00% | ||||||
| U.K. | ||||||||
| Defined benefit obligation related to | ||||||||
| Active plan participants | € 210 | € 272 | ||||||
| Participants in deferred status | 1,135 | 1,321 | ||||||
| Participants in payment status | 1,333 | 1,210 | ||||||
| Total defined benefit obligation | 2,678 | 2,803 | ||||||
| Fair value of plan assets | € 3,505 | € 3,678 | ||||||
| Funding ratio (in %) | 131.00% | 131.00% | ||||||
| U.S. | ||||||||
| Defined benefit obligation related to | ||||||||
| Active plan participants | € 202 | € 229 | ||||||
| Participants in deferred status | 470 | 526 | ||||||
| Participants in payment status | 417 | 461 | ||||||
| Total defined benefit obligation | 1,089 | 1,216 | ||||||
| Fair value of plan assets | € 944 | € 1,050 | ||||||
| Funding ratio (in %) | 87.00% | [1] | 86.00% | [2] | ||||
| Other | ||||||||
| Defined benefit obligation related to | ||||||||
| Active plan participants | € 699 | € 715 | ||||||
| Participants in deferred status | 82 | 84 | ||||||
| Participants in payment status | 218 | 229 | ||||||
| Total defined benefit obligation | 999 | 1,028 | ||||||
| Fair value of plan assets | € 1,158 | € 1,141 | ||||||
| Funding ratio (in %) | 116.00% | 111.00% | ||||||
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