Quarterly report pursuant to Section 13 or 15(d)

Net Loss per Common Unit - Schedule of Net Loss per Unit and Allocation of Distribution (Details)

v3.7.0.1
Net Loss per Common Unit - Schedule of Net Loss per Unit and Allocation of Distribution (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]        
Net income (loss) $ 46 $ (100) $ 93 $ (175)
Declared distributions 25 25 50 50
Amortization of beneficial conversion feature of Class B units 0   0  
Assumed allocation of undistributed net income (loss) $ 21 $ (125) $ 43 $ (225)
Weighted average units outstanding 57.1 57.1 57.1 57.1
Net loss per unit $ (3.71) $ (0.21) $ (4.50) $ (0.29)
Common Units [Member]        
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]        
Net income (loss)     $ 27  
Declared distributions $ 25 $ 25 49 $ 49
Amortization of beneficial conversion feature of Class B units (237)   (306)  
Assumed allocation of undistributed net income (loss) 0 (37) 0 (66)
Assumed allocation of net income (loss) $ (212) $ (12) $ (257) $ (17)
Weighted average units outstanding 57.1 57.1 57.1 57.1
Net loss per unit $ (3.71) $ (0.21) $ (4.50) $ (0.29)
Class B Units [Member]        
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]        
Net income (loss)     $ 0  
Declared distributions $ 0 $ 0 0 $ 0
Amortization of beneficial conversion feature of Class B units 796   1,030  
Assumed allocation of undistributed net income (loss) 0 0 0 0
Assumed allocation of net income (loss) $ 796 $ 0 $ 1,030 $ 0
Weighted average units outstanding 145.3 145.3 145.3 145.3
Subordinated Units [Member]        
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]        
Net income (loss)     $ 64  
Declared distributions $ 0 $ 0 0 $ 0
Amortization of beneficial conversion feature of Class B units (559)   (724)  
Assumed allocation of undistributed net income (loss) 21 (86) 43 (155)
Assumed allocation of net income (loss) $ (538) $ (86) $ (681) $ (155)
Weighted average units outstanding 135.4 135.4 135.4 135.4
Net loss per unit $ (3.97) $ (0.64) $ (5.03) $ (1.14)
General Partner [Member]        
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]        
Net income (loss)     $ 2  
Declared distributions $ 0 $ 0 1 $ 1
Amortization of beneficial conversion feature of Class B units 0   0  
Assumed allocation of undistributed net income (loss) 0 (2) 0 (4)
Assumed allocation of net income (loss) $ 0 $ (2) $ 1 $ (3)