Annual report pursuant to Section 13 and 15(d)

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

v3.8.0.1
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 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]                      
Net income (loss) $ 374 $ 23 $ 46 $ 47 $ 86 $ (82) $ (100) $ (75) $ 490 $ (171) $ (319)
Declared distributions                 514 99 99
Amortization of beneficial conversion feature of Class B units                 0 0 0
Amortization of beneficial conversion feature of Class B units including prior periods effect                   0  
Assumed allocation of undistributed net loss                 $ (24) $ (270) $ (418)
Weighted average units outstanding                 178.5 57.1 57.1
Net loss per unit $ 0.76 [1] $ (1.10) [1] $ (3.71) [1] $ (0.80) [1] $ 0.07 [1] $ (0.27) [1] $ (0.21) [1] $ (0.08) [1] $ (1.32) $ (0.20) $ (0.43)
Common Units [Member]                      
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]                      
Net income (loss)                 $ 294 $ (50) $ (93)
Declared distributions                 376 97 97
Amortization of beneficial conversion feature of Class B units                 (594) (29) 0
Amortization of beneficial conversion feature of Class B units including prior periods effect                   (29)  
Assumed allocation of undistributed net loss                 (17) (79) (121)
Assumed allocation of net income (loss)                 $ (235) $ (11) $ (24)
Weighted average units outstanding                 178.5 57.1 57.1
Net loss per unit [2]                 $ (1.32) $ (0.20) $ (0.43)
Class B Units [Member]                      
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]                      
Net income (loss)                 $ 0 $ 0 $ 0
Declared distributions                 0 0 0
Amortization of beneficial conversion feature of Class B units                 2,004 99 1
Amortization of beneficial conversion feature of Class B units including prior periods effect                   100  
Assumed allocation of undistributed net loss                 0 0 0
Assumed allocation of net income (loss)                 $ 2,004 $ 100 $ 0
Weighted average units outstanding                 84.8 145.3 145.3
Subordinated Units [Member]                      
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]                      
Net income (loss)                 $ 186 $ (117) $ (220)
Declared distributions                 127 0 0
Amortization of beneficial conversion feature of Class B units                 (1,410) (70) (1)
Amortization of beneficial conversion feature of Class B units including prior periods effect                   (71)  
Assumed allocation of undistributed net loss                 (7) (186) (288)
Assumed allocation of net income (loss)                 $ (1,290) $ (257) $ (288)
Weighted average units outstanding                 135.4 135.4 135.4
Net loss per unit [2]                 $ (9.52) $ (1.90) $ (2.13)
General Partner [Member]                      
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]                      
Net income (loss)                 $ 10 $ (4) $ (6)
Declared distributions                 10 2 2
Amortization of beneficial conversion feature of Class B units                 0 0 0
Amortization of beneficial conversion feature of Class B units including prior periods effect                   0  
Assumed allocation of undistributed net loss                 0 (5) (8)
Assumed allocation of net income (loss)                 10 (3) (6)
IDR [Member]                      
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]                      
Declared distributions                 1 0 0
Amortization of beneficial conversion feature of Class B units                 0    
Amortization of beneficial conversion feature of Class B units including prior periods effect                   0  
Assumed allocation of undistributed net loss                 0 [3] 0 0
Assumed allocation of net income (loss)                 $ 1 $ 0 $ 0
[1] The sum of the quarterly net income (loss) per common unit may not equal the full year amount as the undistributed income and loss allocations and computations of the weighted average common units outstanding for basic and diluted common units outstanding for each quarter and the full year are performed independently.
[2] Earnings per unit in the table may not recalculate exactly due to rounding because it is calculated based on whole numbers, not the rounded numbers presented.
[3] Under our partnership agreement, the IDRs participate in net income (loss) only to the extent of the amount of cash distributions actually declared, thereby excluding the IDRs from participating in undistributed net income (loss).