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CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN PARTNERS' CAPITAL - USD ($)
$ in Millions
Total
Total Partners’ Capital
Noncontrolling Interests
Limited Partners
Series A Preferred Units
Total Partners’ Capital
Limited Partners
Series B Preferred Units
Total Partners’ Capital
Limited Partners
Common Units
Total Partners’ Capital
Beginning balance, including noncontrolling interest at Dec. 31, 2016 $ 8,816 $ 8,759 $ 57 $ 1,508   $ 7,251
Increase (Decrease) in Partners' Capital            
Net income 444 444       444
Distributions (Note 9) (372) (371) (1)     (371)
Sales of common units 1,664 1,664       1,664
Other comprehensive income/(loss) 36 36       36
Other 2 2   (1)   3
Ending balance, including noncontrolling interest at Mar. 31, 2017 10,590 10,534 $ 56 1,507   9,027
Increase (Decrease) in Partners' Capital            
Impact of adoption of ASU 2017-05 (Note 2) | ASU 2017-05   113       113
Beginning balance at Dec. 31, 2017 10,958 10,958   1,505 $ 788 8,665
Increase (Decrease) in Partners' Capital            
Net income 288 288   37 12 239
Distributions (Note 9)   (267)   (37) (12) (218)
Other comprehensive income/(loss) (65) (65)       (65)
Other   9     (1) 10
Ending balance at Mar. 31, 2018 $ 11,036 $ 11,036   $ 1,505 $ 787 $ 8,744