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Consolidated Statement Of Equity - USD ($)
$ in Millions
Total
Series A Convertible Preferred Units [Member]
Common Unitholders
General Partner
Noncontrolling Interest
AOCI Attributable to Parent [Member]
Balance, Beginning of Period at Dec. 31, 2017 $ 29,980 $ 450 $ (1,643) $ (3) $ 31,176  
Distributions to partners (266) 0 (265) (1) 0  
Distributions to noncontrolling interest (893) 0 0 0 (893)  
Distributions reinvested 0 58 (58) 0 0  
Subsidiary units repurchased (24) (6) (98) 0 80  
Subsidiary units issued 20 0 1 0 19  
Capital contributions received from noncontrolling interests 229 0 0 0 229  
Other comprehensive income, net of tax 1 0 0 0 1  
Other, net (1) (4) 26 0 (23)  
Net income 489 21 341 1 126  
Balance, End of Period at Mar. 31, 2018 29,481 519 (1,696) (3) 30,661  
Cumulative effect adjustment due to change in accounting principle (54) $ 0 0 0 (54)  
Balance, Beginning of Period at Dec. 31, 2018 30,850   20,606 (5) 10,291 $ (42)
Distributions to partners (800)   (799) (1) 0 0
Distributions to noncontrolling interest (425)   0 0 (425) 0
Capital contributions received from noncontrolling interests 140   0 0 140 0
Sale of noncontrolling interest in subsidiary 93   0 0 93 0
Other comprehensive income, net of tax 8   0 0 0 8
Other, net 29   17 0 12 0
Net income 1,180          
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Excluding Portion Attributable to Redeemable Noncontrolling Interest 1,167   869 1 297 0
Balance, End of Period at Mar. 31, 2019 $ 31,062   $ 20,693 $ (5) $ 10,408 $ (34)