Annual report pursuant to Section 13 and 15(d)

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

v3.10.0.1
Net Income (Loss) per Common Unit - Schedule of Net Income (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, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]                      
Net income (loss) $ 351 $ 307 $ 281 $ 335 $ 374 $ 23 $ 46 $ 47 $ 1,274 $ 490 $ (171)
Declared distributions                 1,162 514 99
Amortization of beneficial conversion feature of Class B units                   0 0
Amortization of beneficial conversion feature of Class B units                     0
Assumed allocation of undistributed net income (loss)                 $ 112 [1] $ (24) [1] $ (270)
Weighted average units outstanding                 348.6 178.5 57.1
Basic and diluted net income (loss) per unit $ 0.69 [2] $ 0.60 [2] $ 0.55 [2] $ 0.67 [2] $ 0.76 [2] $ (1.10) [2] $ (3.71) [2] $ (0.80) [2] $ 2.51 $ (1.32) $ (0.20)
Common Units [Member]                      
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]                      
Net income (loss)                 $ 899 $ 294 $ (50)
Declared distributions                 795 376 97
Amortization of beneficial conversion feature of Class B units                   (594) (29)
Amortization of beneficial conversion feature of Class B units                     (29)
Assumed allocation of undistributed net income (loss)                 79 [1] (17) [1] (79)
Assumed allocation of net income (loss)                 $ 874 $ (235) $ (11)
Weighted average units outstanding                 348.6 178.5 57.1
Basic and diluted net income (loss) per unit                 $ 2.51 $ (1.32) [3] $ (0.20) [3]
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
Amortization of beneficial conversion feature of Class B units                     100
Assumed allocation of undistributed net income (loss)                 0 [1] 0 [1] 0
Assumed allocation of net income (loss)                 $ 0 $ 2,004 $ 100
Weighted average units outstanding                 0.0 84.8 145.3
Subordinated Units [Member]                      
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]                      
Net income (loss)                 $ 349 $ 186 $ (117)
Declared distributions                 309 127 0
Amortization of beneficial conversion feature of Class B units                   (1,410) (70)
Amortization of beneficial conversion feature of Class B units                     (71)
Assumed allocation of undistributed net income (loss)                 31 [1] (7) [1] (186)
Assumed allocation of net income (loss)                 $ 340 $ (1,290) $ (257)
Weighted average units outstanding                 135.4 135.4 135.4
Basic and diluted net income (loss) per unit                 $ 2.51 $ (9.52) [3] $ (1.90)
General Partner [Member]                      
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]                      
Net income (loss)                 $ 26 $ 10 $ (4)
Declared distributions                 22 10 2
Amortization of beneficial conversion feature of Class B units                   0 0
Amortization of beneficial conversion feature of Class B units                     0
Assumed allocation of undistributed net income (loss)                 2 [1] 0 [1] (5)
Assumed allocation of net income (loss)                 24 10 (3)
IDR [Member]                      
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]                      
Declared distributions                 36 1 0
Amortization of beneficial conversion feature of Class B units                   0  
Amortization of beneficial conversion feature of Class B units                     0
Assumed allocation of undistributed net income (loss)                 0 [1] 0 [1] 0
Assumed allocation of net income (loss)                 $ 36 $ 1 $ 0
[1] 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).
[2] 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.
[3] 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.