v3.25.0.1
Tangible fixed assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Tangible fixed assets    
Balance, at the beginning of the year $ 1,477,458  
Balance, at the end of the year 1,276,472 $ 1,477,458
GasLog Ltd. | GasLog Facility    
Tangible fixed assets    
Notional amount 2,800,000  
Cost    
Tangible fixed assets    
Balance, at the beginning of the year 2,162,904 2,364,508
Additions, net 8,117 9,453
Disposal (201,842) (203,884)
Write-off of fully amortized drydocking component (54) (7,173)
Balance, at the end of the year 1,969,125 2,162,904
Accumulated depreciation and impairment loss    
Tangible fixed assets    
Balance, at the beginning of the year (685,446) (686,737)
Depreciation (55,782) (59,424)
Disposal 56,489 53,542
Impairment loss (7,968)  
Write-off of fully amortized drydocking component 54 7,173
Balance, at the end of the year (692,653) (685,446)
Vessels    
Tangible fixed assets    
Balance, at the beginning of the year 1,470,141  
Balance, at the end of the year 1,269,155 1,470,141
Vessels | Cost    
Tangible fixed assets    
Balance, at the beginning of the year 2,155,587 2,358,896
Additions, net 8,117 7,748
Disposal (201,842) (203,884)
Write-off of fully amortized drydocking component (54) (7,173)
Balance, at the end of the year 1,961,808 2,155,587
Vessels | Accumulated depreciation and impairment loss    
Tangible fixed assets    
Balance, at the beginning of the year (685,446) (686,737)
Depreciation (55,782) (59,424)
Disposal 56,489 53,542
Impairment loss (7,968)  
Write-off of fully amortized drydocking component 54 7,173
Balance, at the end of the year (692,653) (685,446)
Other tangible assets    
Tangible fixed assets    
Balance, at the beginning of the year 7,317  
Balance, at the end of the year 7,317 7,317
Other tangible assets | Cost    
Tangible fixed assets    
Balance, at the beginning of the year 7,317 5,612
Additions, net   1,705
Balance, at the end of the year $ 7,317 $ 7,317