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CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN PARTNERS' CAPITAL - USD ($)
$ in Millions
Total
Total Partners’ Capital
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
Increase (Decrease) in Partners' Capital          
Impact of adoption of ASU 2017-05 | ASU 2017-05   $ 113     $ 113
Adjusted balance   11,071 $ 1,505 $ 788 8,778
Beginning balance at Dec. 31, 2017   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)
Equity-indexed compensation expense   11     11
Other   (2)   (1) (1)
Ending balance at Mar. 31, 2018   11,036 1,505 787 8,744
Beginning balance at Dec. 31, 2018 12,002 12,002 1,505 787 9,710
Increase (Decrease) in Partners' Capital          
Net income 970 970 37 12 921
Distributions (Note 9)   (267) (37) (12) (218)
Other comprehensive income/(loss) 58 58     58
Equity-indexed compensation expense   3     3
Other   (4)   0 (4)
Ending balance at Mar. 31, 2019 $ 12,762 $ 12,762 $ 1,505 $ 787 $ 10,470