Property, plant and equipment, Acquisition and Disposal (Details) $ in Millions |
6 Months Ended | 12 Months Ended | |
|---|---|---|---|
|
Jun. 30, 2026
USD ($)
Vessel
Pool
|
Jun. 30, 2025
USD ($)
|
Dec. 31, 2025
Pool
|
|
| Acquisition and disposal [Abstract] | |||
| Number of commercial pools | Pool | 7 | 9 | |
| Impairment losses | $ | $ 0.0 | $ 0.0 | |
| Sale proceeds | $ | 281.3 | ||
| Mortgaged vessels carrying amount | $ | 1,179.4 | 1,982.2 | |
| Right-of-use Assets - Vessels [Member] | |||
| Acquisition and disposal [Abstract] | |||
| Additions to right-of-use assets - Vessels | $ | $ 20.4 | $ 17.9 | |
| MR Vessels [Member] | |||
| Acquisition and disposal [Abstract] | |||
| Number of vessels disposed | 4 | ||
| Number of time chartered vessels with purchase option | 7 | ||
| LR1 Vessels [Member] | |||
| Acquisition and disposal [Abstract] | |||
| Number of vessels disposed | 4 | ||
| Number of time chartered vessels with purchase option | 2 | ||
| Handy vessels [Member] | |||
| Acquisition and disposal [Abstract] | |||
| Number of vessels disposed | 4 | ||