Dividends paid and proposed - Schedule of Gross Dividends Declared and Paid (Parenthetical) (Detail) - € / shares |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Class A Shares [Member] | |||
| Disclosure Of Gross Dividends Declared And Paid [Line Items] | |||
| Dividends paid, other shares per share | € 0.25 | € 0.5 | € 0.5 |
| Interim Dividend Paid Per Share | 0.25 | 0.25 | |
| Class B Shares [Member] | |||
| Disclosure Of Gross Dividends Declared And Paid [Line Items] | |||
| Dividends paid, other shares per share | 0.1 | 0.2 | € 0.2 |
| Interim Dividend Paid Per Share | € 0.1 | € 0.1 | |