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CONSOLIDATED STATEMENTS OF CHANGES IN PARTNERS' CAPITAL - USD ($)
$ in Millions
Total
Partners’ Capital Excluding Noncontrolling Interests
Noncontrolling Interests
General Partner
Partners’ Capital Excluding Noncontrolling Interests
Series A Preferred Units
Limited Partners
Partners’ Capital Excluding Noncontrolling Interests
Series B Preferred Units
Limited Partners
Partners’ Capital Excluding Noncontrolling Interests
Common Units
Common Units
Limited Partners
Partners’ Capital Excluding Noncontrolling Interests
Balance, beginning of period at Dec. 31, 2015 $ 7,939 $ 7,881 $ 58 $ 301 $ 0 $ 0   $ 7,580
Increase (Decrease) in Partners' Capital [Roll Forward]                
Net income 730 726 4 393       333
Distributions (Note 12) (1,631) (1,627) (4) (565)       (1,062)
Sale of Series A preferred units 1,542 1,542   33 1,509      
Sales of common units 805 805   9       796
Other comprehensive income/(loss) 72 72   0       72
Simplification Transactions (Note 1) (642) (642)   (171)       (471)
Equity-indexed compensation expense 26 26   0       26
Other (25) (24) (1) 0 (1)     (23)
Balance, end of period at Dec. 31, 2016 8,816 8,759 57 0 1,508 0   7,251
Increase (Decrease) in Partners' Capital [Roll Forward]                
Net income 858 856 2     11   845
Distributions (Note 12) (1,399) (1,397) (2)     (11)   (1,386)
Sale of Series B preferred units 788 788       788    
Sales of common units 1,664 1,664         $ 1,664 1,664
Acquisition of interest in Advantage Joint Venture (Note 7) 40 40           40
Sale of interest in SLC Pipeline LLC (Note 7) (57)   (57)          
Other comprehensive income/(loss) 239 239           239
Equity-indexed compensation expense 22 22           22
Other (13) (13)     (3)     (10)
Balance, end of period at Dec. 31, 2017 10,958 10,958 0 0 1,505 788   8,665
Increase (Decrease) in Partners' Capital [Roll Forward]                
Impact of adoption of ASU 2017-05 (Note 2) | ASU 2017-05 113 113           113
Adjusted balance 11,071 11,071     1,505 788   8,778
Net income 2,216 2,216     149 49   2,018
Distributions (Note 12) (1,069) (1,069)     (149) (49)   (871)
Other comprehensive income/(loss) (260) (260)           (260)
Equity-indexed compensation expense 56 56           56
Other (12) (12)       (1)   (11)
Balance, end of period at Dec. 31, 2018 $ 12,002 $ 12,002 $ 0 $ 0 $ 1,505 $ 787   $ 9,710