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Subsequent Events (Details)
$ in Thousands
1 Months Ended 12 Months Ended
Mar. 31, 2021
USD ($)
Nov. 30, 2020
USD ($)
Oct. 31, 2020
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Mar. 10, 2021
USD ($)
vessel
Feb. 08, 2021
USD ($)
Feb. 05, 2021
vessel
Subsequent Event [Line Items]                  
Carrying amount of long-term debt       $ 2,087,083 $ 2,867,120        
Proceeds from Sale of Property, Plant, and Equipment       60,915 31,523 $ 28,837      
Payments to Acquire Property, Plant, and Equipment       $ 26,507 109,523 $ 693,792      
Teekay LNG | Teekay Tangguh Joint Venture                  
Subsequent Event [Line Items]                  
Ownership percentage       70.00%          
Teekay Tankers                  
Subsequent Event [Line Items]                  
Payments to Acquire Property, Plant, and Equipment   $ 56,700 $ 29,600            
Teekay Tankers | Subsequent Events                  
Subsequent Event [Line Items]                  
Proceeds from Sale of Property, Plant, and Equipment $ 32,000                
Lessee, Sales-type lease, Purchase option price             $ 128,800    
Teekay Tankers | Subsequent Events | Aframax Tanker [Member]                  
Subsequent Event [Line Items]                  
Number of vessels | vessel                 2
Aframax Tanker [Member] | Teekay Tankers | Subsequent Events                  
Subsequent Event [Line Items]                  
Number of vessels to be repurchased from repurchase options | vessel             6    
Lessee, Sales-type lease, Purchase option price             $ 128,800    
Senior Notes (8.5%) due January 15, 2020                  
Subsequent Event [Line Items]                  
Carrying amount of long-term debt       $ 0 36,712        
Secured debt | Teekay LNG | Subsequent Events | Teekay Tangguh Joint Venture                  
Subsequent Event [Line Items]                  
Carrying amount of long-term debt               $ 191,500  
Revolving Credit Facility                  
Subsequent Event [Line Items]                  
Carrying amount of long-term debt       $ 285,000 $ 603,132