v3.26.1
Provisions - Schedule of changes in fair value of plan assets, Other Foreign Subsidiaries (Details) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of net defined benefit liability (asset) [line items]      
Incorporation of Group companies, net € 13 € 0 € 4
Benefits paid by settlements 133 20 2
Other foreign subsidiaries | Plan assets      
Disclosure of net defined benefit liability (asset) [line items]      
Fair value of plan assets at beginning of year 6,502 7,787 7,321
Incorporation of Group companies, net 0 0 (16)
Expected return on plan assets 556 551 588
Benefits paid (752) (1,022) (644)
Contributions 134 477 124
Actuarial gains/(losses) (201) (304) 110
Benefits paid by settlements (1) 0 0
Exchange differences and other items 46 (987) 304
Fair value of plan assets at end of year € 6,284 € 6,502 € 7,787