v3.25.3
Derivative Financial Instruments - Disclosure of Instruments (Details)
€ in Millions
Jun. 30, 2025
EUR (€)
Notional amount  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives € 2,348
Notional amount | Fair value hedges  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives 1,498
Notional amount | Cash flow hedges  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives 850
Notional amount | 2025  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives 0
Notional amount | 2026  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives 0
Notional amount | 2027  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives 850
Notional amount | 2028  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives 848
Notional amount | 2029 and beyond  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives 650
Fair value  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives (88)
Fair value | Fair value hedges  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives (81)
Fair value | Cash flow hedges  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives (7)
Value of hedge recognized in equity | Cash flow hedges  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives (3)
pay capitalized SOFR USD / receive 1.17% | Notional amount  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives 848
pay capitalized SOFR USD / receive 1.17% | Notional amount | Fair value hedges  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives 848
pay capitalized SOFR USD / receive 1.17% | Notional amount | 2025  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives 0
pay capitalized SOFR USD / receive 1.17% | Notional amount | 2026  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives 0
pay capitalized SOFR USD / receive 1.17% | Notional amount | 2027  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives 0
pay capitalized SOFR USD / receive 1.17% | Notional amount | 2028  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives 848
pay capitalized SOFR USD / receive 1.17% | Fair value  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives (54)
pay capitalized SOFR USD / receive 1.17% | Fair value | Fair value hedges  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives (54)
pay capitalized SOFR USD / receive 1.17% | Value of hedge recognized in equity | Cash flow hedges  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives 0
pay 2.08% / receive Euribor 3m | Notional amount  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives 850
pay 2.08% / receive Euribor 3m | Notional amount | Cash flow hedges  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives 850
pay 2.08% / receive Euribor 3m | Notional amount | 2025  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives 0
pay 2.08% / receive Euribor 3m | Notional amount | 2027  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives 850
pay 2.08% / receive Euribor 3m | Notional amount | 2028  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives 0
pay 2.08% / receive Euribor 3m | Notional amount | 2029 and beyond  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives 0
pay 2.08% / receive Euribor 3m | Fair value  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives (7)
pay 2.08% / receive Euribor 3m | Fair value | Cash flow hedges  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives (7)
pay 2.08% / receive Euribor 3m | Value of hedge recognized in equity | Cash flow hedges  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives (3)
pay capitalized Ester / receive 0.92% | Notional amount  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives 650
pay capitalized Ester / receive 0.92% | Notional amount | Fair value hedges  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives 650
pay capitalized Ester / receive 0.92% | Notional amount | Cash flow hedges  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives 0
pay capitalized Ester / receive 0.92% | Notional amount | 2025  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives 0
pay capitalized Ester / receive 0.92% | Notional amount | 2026  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives 0
pay capitalized Ester / receive 0.92% | Notional amount | 2027  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives 0
pay capitalized Ester / receive 0.92% | Notional amount | 2028  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives 0
pay capitalized Ester / receive 0.92% | Notional amount | 2029 and beyond  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives 650
pay capitalized Ester / receive 0.92% | Fair value  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives (27)
pay capitalized Ester / receive 0.92% | Fair value | Fair value hedges  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives (27)
pay capitalized Ester / receive 0.92% | Fair value | Cash flow hedges  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives 0
pay capitalized Ester / receive 0.92% | Value of hedge recognized in equity | Cash flow hedges  
Disclosure of detailed information about financial instruments [line items]  
Currency and interest rate derivatives € 0