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Total Capital and Net (Loss) Income Per Common Unit - Additional Information - Common Units and Brookfield Transaction Warrants (Details)
$ / shares in Units, shares in Millions
1 Months Ended 9 Months Ended
Sep. 25, 2017
USD ($)
day
$ / shares
shares
Sep. 30, 2017
USD ($)
shares
Sep. 30, 2017
USD ($)
shares
Sep. 30, 2016
USD ($)
Dec. 31, 2016
USD ($)
Jul. 01, 2016
USD ($)
Limited Partners' Capital Account [Line Items]            
Proceeds from issuance of common units and warrants     $ 640,595,000 $ 124,879,000    
Due to affiliates   $ 160,757,000 160,757,000   $ 200,000,000  
Contribution of capital from Teekay Corporation (notes 6i and 10)     $ 45,315,000      
Exercise price of warrants (usd per share) | $ / shares $ 0.01          
Par value (USD per share) | $ / shares $ 4.00          
Consecutive trading days | day 10          
Payment-in-kind distributions (units) | shares     6.4      
Total value of common units issued as payment-in-kind distribution     $ 29,800,000      
General Partner            
Limited Partners' Capital Account [Line Items]            
Contribution of capital from Teekay Corporation (notes 6i and 10)     873,000      
Total value of common units issued as payment-in-kind distribution     $ 600,000      
General partner's interest (percent)     2.00%      
Brookfield | Common Units            
Limited Partners' Capital Account [Line Items]            
Fair value basis of investment   512,600,000 $ 512,600,000      
Brookfield | Warrants            
Limited Partners' Capital Account [Line Items]            
Fair value basis of investment   $ 121,300,000 121,300,000      
Subordinated Promissory Notes            
Limited Partners' Capital Account [Line Items]            
Number of warrants to be issued (in shares) | shares   11.4        
Aggregate proceeds from the debt purchase   $ 140,000,000        
Debt instrument, face amount           $ 200,000,000.0
Subordinated Promissory Notes | Brookfield Promissory Note            
Limited Partners' Capital Account [Line Items]            
Due to affiliates $ 200,000,000 200,000,000 200,000,000      
Debt instrument, face amount   200,000,000 200,000,000      
Extinguishment of debt     163,600,000      
Subordinated Promissory Notes | Teekay Corporation Promissory Note            
Limited Partners' Capital Account [Line Items]            
Debt instrument, face amount   $ 200,000,000 200,000,000      
Extinguishment of debt     $ 160,500,000      
Brookfield            
Limited Partners' Capital Account [Line Items]            
Number of shares to be issued/exchanged | shares 244.0 244.0        
Number of warrants to be issued (in shares) | shares 62.4 62.4        
Cash consideration $ 610,000,000 $ 610,000,000        
Proceeds from issuance of common units and warrants $ 637,000,000          
Brookfield | Brookfield | Warrants            
Limited Partners' Capital Account [Line Items]            
Number of warrants (in shares) | shares   51.0 51.0      
Teekay Corporation            
Limited Partners' Capital Account [Line Items]            
Number of shares to be issued/exchanged | shares 12.0 12.0        
Number of warrants to be issued (in shares) | shares 3.1 3.1        
Cash consideration $ 30,000,000 $ 30,000,000        
Teekay Corporation | Brookfield | Warrants            
Limited Partners' Capital Account [Line Items]            
Number of warrants (in shares) | shares   14.5 14.5      
Teekay Corporation | Subordinated Promissory Notes            
Limited Partners' Capital Account [Line Items]            
Number of warrants to be issued (in shares) | shares 11.4          
Aggregate proceeds from the debt purchase $ 140,000,000          
Common Units and Additional Paid-in Capital | Limited Partners            
Limited Partners' Capital Account [Line Items]            
Contribution of capital from Teekay Corporation (notes 6i and 10)     $ 44,442,000      
Common Units and Additional Paid-in Capital | Brookfield Promissory Note | Limited Partners            
Limited Partners' Capital Account [Line Items]            
Contribution of capital from Teekay Corporation (notes 6i and 10)     $ 39,500,000