v3.25.3
Non-Current Provisions And Other Non-Current Liabilities - Disclosure of Remeasurement of Net Defined Benefit Liability Asset (Details) - EUR (€)
€ in Millions
 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Actuarial assumption of discount rates | Minimum    
Disclosure of net defined benefit liability (asset) [Line Items]    
Decrease in actuarial assumption 0.00%  
Increase in actuarial assumption   0.40%
Actuarial assumption of discount rates | Maximum    
Disclosure of net defined benefit liability (asset) [Line Items]    
Increase in actuarial assumption 0.30% 0.65%
UKZONE | Actuarial assumption of expected rates of inflation    
Disclosure of net defined benefit liability (asset) [Line Items]    
Decrease in actuarial assumption (0.30%)  
Eurozone | Actuarial assumption of expected rates of inflation    
Disclosure of net defined benefit liability (asset) [Line Items]    
Increase in actuarial assumption   0.10%
Pensions and other post-employment benefits    
Disclosure of net defined benefit liability (asset) [Line Items]    
Actuarial gains/(losses) on benefit obligations [1] € 152 [2] € 373 [3]
Pensions and other post-employment benefits | Opella Business    
Disclosure of net defined benefit liability (asset) [Line Items]    
Actuarial gains/(losses) on benefit obligations (4) (6)
Plan assets | Pensions and other post-employment benefits    
Disclosure of net defined benefit liability (asset) [Line Items]    
Actuarial gains/(losses) on plan assets [1] € (45) € (138)
[1] Includes actuarial gains/ (losses) related to Opella of €(4) million for the first half of 2025 and €(6) million for the first half of 2024.
[2] Includes the effects of (i) the change in discount rates (in a range between 0.00% and +0.30%) and (ii) the -0.30% change in the inflation rate in the United Kingdom in the first half of 2025.
[3] Includes the effects of (i) the change in discount rates (in a range between +0.40% and +0.65%) and (ii) the +0.10% change in the inflation rate in the United Kingdom in the first half of 2024.