Dividends paid and proposed - Schedule of Gross Dividends Declared and Paid (Detail) - EUR (€) € in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Disclosure Of Gross Dividends Declared And Paid [Line Items] | |||
| Dividends paid, other shares | € 224 | € 335 | € 223 |
| Class A Shares [Member] | |||
| Disclosure Of Gross Dividends Declared And Paid [Line Items] | |||
| Dividends paid, other shares | 93 | 186 | 186 |
| Interim dividend paid | 93 | 93 | 0 |
| Class B Shares [Member] | |||
| Disclosure Of Gross Dividends Declared And Paid [Line Items] | |||
| Dividends paid, other shares | 19 | 37 | 37 |
| Interim dividend paid | € 19 | € 19 | € 0 |