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Financial Instruments Narrative (Detail) - $ / shares
May 08, 2019
Jun. 30, 2019
Dec. 31, 2018
Derivative [Line Items]      
Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest 49.00%    
Common stock, par value (in usd per share)   $ 0.001 $ 0.001
Teekay Offshore [Member] | Stock purchase warrants | Brookfield Business Partners L.P. [Member]      
Derivative [Line Items]      
Number of shares available through exercise of stock purchase warrant (in shares) 15,500,000    
Teekay Offshore [Member] | Series D Warrant      
Derivative [Line Items]      
Number of shares available through exercise of stock purchase warrant (in shares) 1,755,000