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Write-down and loss on sale of vessels - Net (Loss) Gain on Sale of Vessels, Equipment and Other Operating Assets (Detail)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
USD ($)
vessel
Dec. 31, 2023
USD ($)
vessel
Dec. 31, 2022
USD ($)
vessel
Property, Plant and Equipment [Line Items]      
Operating Lease, Impairment Loss $ 1,400   $ 1,100
At cost, less accumulated depreciation of $570.9 million (2023 – $440.9 million) 1,132,109 $ 929,237  
Teekay Parent [Member] | Other | FPSO      
Property, Plant and Equipment [Line Items]      
Gain (Loss) on Disposition of Assets     (13,000)
At cost, less accumulated depreciation of $570.9 million (2023 – $440.9 million)     0
Teekay Tankers      
Property, Plant and Equipment [Line Items]      
Gain (Loss) on Disposition of Assets (39,500) $ (10,400) (9,400)
Proceeds from sale of vessels and equipment (note 18) $ 88,300   $ 68,400
Teekay Tankers | Suezmax      
Property, Plant and Equipment [Line Items]      
Number Of Vessels Sold | vessel 1    
Teekay Tankers | LR2 and Aframax Tankers      
Property, Plant and Equipment [Line Items]      
Number Of Vessels Write Down | vessel     1
Teekay Tankers | Suezmax Tanker      
Property, Plant and Equipment [Line Items]      
Number Of Vessels Sold | vessel     1
Teekay Tankers | Aframax/LR2 Tankers      
Property, Plant and Equipment [Line Items]      
Number Of Vessels Sold | vessel 2 1 3
Proceeds from sale of vessels and equipment (note 18)   $ 23,000  
reversal of asset impairment charges     $ 600