Share-based compensation - Other (Details) - Unit Appreciation Rights - WillowTree $ in Millions |
12 Months Ended |
|---|---|
|
Dec. 31, 2023
USD ($)
| |
| share-based compensation | |
| Future exercise period | 3 years |
| Maximum | |
| share-based compensation | |
| Unit appreciation rights, granted, value | $ 120 |