Related-party transactions - Text Details (Detail) - EUR (€) € in Millions |
12 Months Ended | |||
|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Aug. 14, 2023 |
|
| Related-party transactions [Line Items] | ||||
| Revenue from sale of goods, related party transactions | € 146 | € 89 | € 106 | |
| Non-recourse third-party receivables sold from PMC | 70 | 75 | 117 | |
| PMC | ||||
| Related-party transactions [Line Items] | ||||
| Revenue from sale of goods, related party transactions | € 146 | € 88 | € 87 | |
| Bottom of range | Exor N.V | ||||
| Related-party transactions [Line Items] | ||||
| Minority stake | 15.00% | |||
| Top of range | Exor N.V | ||||
| Related-party transactions [Line Items] | ||||
| Minority stake | 20.00% | |||