Earnings per share - Schedule of Profit Loss Attributable to the Owners of the Parent for Calculating Diluted Earnings Per Share (Parenthetical) (Detail) |
12 Months Ended |
|---|---|
Dec. 31, 2025 | |
| Class A Shares [Member] | |
| Disclosure of profit loss attributable to the owners of the parent for calculating diluted earnings per share [line items] | |
| Percentage of adjusted loss attributable to owners of the parent | 83.00% |
| Class B Shares [Member] | |
| Disclosure of profit loss attributable to the owners of the parent for calculating diluted earnings per share [line items] | |
| Percentage of adjusted loss attributable to owners of the parent | 17.00% |