v3.25.4
Note 25 Medical benefits commitments (Details) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Medical benefits commitments [Line Items]      
Medical benefits commitments € 1,269 € 1,728  
Medical benefits commitments 1,702 1,269 € 1,728
Present value of defined benefit obligation [member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments 1,269 1,728 1,448
Medical benefits commitments 1,702 1,269 1,728
Present value of defined benefit obligation [member] | Current service cost [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year 13 18 20
Present value of defined benefit obligation [member] | Interest income or expense [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year 145 167 167
Present value of defined benefit obligation [member] | Contributions by plan participants [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year 0 0 0
Present value of defined benefit obligation [member] | Employer contributions [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year 0 0 0
Present value of defined benefit obligation [member] | Past service cost [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year [1] 0 0 0
Present value of defined benefit obligation [member] | Remeasurements [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year 332 (333) (5)
Present value of defined benefit obligation [member] | Return of plan assets [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year [2] 0 0 0
Present value of defined benefit obligation [member] | From changes in demographic assumptions [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year 0 15 (70)
Present value of defined benefit obligation [member] | From changes in financial assumptions [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year 266 (293) 56
Present value of defined benefit obligation [member] | Other actuarial gains and losses [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year 65 (55) 8
Present value of defined benefit obligation [member] | Benefit payments [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year (86) (71) (70)
Present value of defined benefit obligation [member] | Settlements payments [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year 0 0 0
Present value of defined benefit obligation [member] | Total for all business combinations [member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year 0 0 0
Present value of defined benefit obligation [member] | Effect on changes in foreign exchange rates [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year 30 (240) 168
Present value of defined benefit obligation [member] | Other effects Post employment commitments [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year 0 0 0
Plan assets [member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments 1,367 1,744 1,476
Medical benefits commitments 1,747 1,367 1,744
Plan assets [member] | Current service cost [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year 0 0 0
Plan assets [member] | Interest income or expense [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year 161 168 165
Plan assets [member] | Contributions by plan participants [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year 0 0 0
Plan assets [member] | Employer contributions [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year 106 15 17
Plan assets [member] | Past service cost [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year [1] 0 0 0
Plan assets [member] | Remeasurements [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year 167 (247) (17)
Plan assets [member] | Return of plan assets [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year [2] 167 (247) (17)
Plan assets [member] | From changes in demographic assumptions [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year 0 0 0
Plan assets [member] | From changes in financial assumptions [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year 0 0 0
Plan assets [member] | Other actuarial gains and losses [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year 0 0 0
Plan assets [member] | Benefit payments [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year (86) (70) (70)
Plan assets [member] | Settlements payments [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year 0 0 0
Plan assets [member] | Total for all business combinations [member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year 0 0 0
Plan assets [member] | Effect on changes in foreign exchange rates [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year 32 (243) 173
Plan assets [member] | Other effects Post employment commitments [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year 0 0 0
Net liability asset [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments (98) (16) (28)
Medical benefits commitments (45) (98) (16)
Net liability asset [Member] | Current service cost [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year 13 18 20
Net liability asset [Member] | Interest income or expense [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year (16) (2) 2
Net liability asset [Member] | Contributions by plan participants [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year 0 0 0
Net liability asset [Member] | Employer contributions [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year (106) (15) (17)
Net liability asset [Member] | Past service cost [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year [1] 0 0 0
Net liability asset [Member] | Remeasurements [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year 165 (86) 12
Net liability asset [Member] | Return of plan assets [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year [2] (167) 247 17
Net liability asset [Member] | From changes in demographic assumptions [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year 0 15 (70)
Net liability asset [Member] | From changes in financial assumptions [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year 266 (293) 56
Net liability asset [Member] | Other actuarial gains and losses [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year 65 (55) 8
Net liability asset [Member] | Benefit payments [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year 0 0 0
Net liability asset [Member] | Settlements payments [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year 0 0 0
Net liability asset [Member] | Total for all business combinations [member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year 0 0 0
Net liability asset [Member] | Effect on changes in foreign exchange rates [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year (2) 3 (5)
Net liability asset [Member] | Other effects Post employment commitments [Member]      
Medical benefits commitments [Line Items]      
Medical benefits commitments changes of the year € 0 € 0 € 0
[1]
(1) Including gains and losses arising from settlements.
[2]
(2) Excluding interest, which is recorded under "Interest income or expense".