Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.2
Net Income per Common Unit - Schedule of Net Income per Unit and Allocation of Distribution (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2019
Mar. 31, 2019
Jun. 30, 2020
Jun. 30, 2019
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]            
Net income $ 406 $ 435 $ 232 $ 385 $ 841 $ 617
Declared distributions 341   316   678 626
Assumed allocation of undistributed net income [1] $ 65   $ (84)   $ 163 $ (9)
Weighted average units outstanding 348.6   348.6   348.6 348.6
Basic and diluted net income per unit $ 0.78   $ 0.44   $ 1.62 $ 1.19
Common Units [Member]            
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]            
Net income $ 287 307 $ 164 272    
Declared distributions 225   211   $ 448 $ 421
Assumed allocation of undistributed net income [1] 46   (58)   115 (6)
Assumed allocation of net income $ 271   $ 153   $ 563 $ 415
Weighted average units outstanding 348.6   348.6   348.6 348.6
Basic and diluted net income per unit $ 0.78 [2]   $ 0.44   $ 1.62 $ 1.19
Subordinated Units [Member]            
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]            
Net income $ 111 119 $ 64 105    
Declared distributions 87   83   $ 174 $ 164
Assumed allocation of undistributed net income [1] 18   (24)   45 (3)
Assumed allocation of net income $ 105   $ 59   $ 219 $ 161
Weighted average units outstanding 135.4   135.4   135.4 135.4
Basic and diluted net income per unit $ 0.78 [2]   $ 0.44   $ 1.62 $ 1.19
General Partner [Member]            
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]            
Net income $ 8 $ 9 $ 4 $ 8    
Declared distributions 7   7   $ 14 $ 13
Assumed allocation of undistributed net income [1] 1   (2)   3 0
Assumed allocation of net income 8   5   17 13
IDR [Member]            
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]            
Declared distributions 22   15   42 28
Assumed allocation of undistributed net income [1] 0   0   0 0
Assumed allocation of net income $ 22   $ 15   $ 42 $ 28
[1]
Under our partnership agreement, the IDRs participate in net income only to the extent of the amount of cash distributions actually declared, thereby excluding the IDRs from participating in undistributed net income.
[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.