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Commitments and Contingencies - Other (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2020
Dec. 31, 2019
Teekay LNG      
Other Commitments [Line Items]      
Principal Amount Outstanding On Secured Loan Facilities and Fair Value of Interest Rate Swaps   $ 1,400,000  
Settlement Proposal With HMRC Related to Deductibility Of Certain Related Party Transactions in 2010 | Teekay LNG      
Other Commitments [Line Items]      
Loss Contingency, Loss in Period $ 1,100    
Loss Contingency Accrual     $ 1,600
Settlement Proposal With HMRC Related to Deductibility Of Certain Related Party Transactions in 2010 | Teekay Tangguh Joint Venture      
Other Commitments [Line Items]      
Loss Contingency, Loss in Period $ 1,600