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Organization and Operations (Details) - item
12 Months Ended 104 Months Ended
Dec. 31, 2022
Oct. 26, 2021
May 12, 2014
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2021
Organization and Operations            
Number of LNG carriers acquired on IPO     3      
Percentage of ownership in each entity acquired         100.00%  
Number of entities acquired         15  
Number of vessels owned 12     12 12  
Number of vessels under lease-back 2     2 2  
GAS-three Ltd.            
Organization and Operations            
Lease-back bareboat charter period in years   5 years        
Ownership interest in subsidiary (in percent) 100.00%          
GasLog Ltd.            
Organization and Operations            
General partner interest in GasLog Partners 2.00%     2.00% 2.00% 2.00%
GasLog Ltd. | GasLog Partners LP            
Organization and Operations            
Ownership interest in subsidiary (in percent)       33.20%    
General partner interest in GasLog Partners 2.00%     2.00% 2.00%  
GasLog Ltd. | General partner            
Organization and Operations            
Ownership interest in subsidiary (in percent)       100.00%