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CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN PARTNERS' CAPITAL - USD ($)
$ in Millions
Total
Partners’ Capital Excluding Noncontrolling Interests
Noncontrolling Interests
Limited Partners
Series A Preferred Units
Partners’ Capital Excluding Noncontrolling Interests
Limited Partners
Common Units
Partners’ Capital Excluding Noncontrolling Interests
General Partner
Partners’ Capital Excluding Noncontrolling Interests
Balance, beginning of period at Dec. 31, 2014 $ 8,191 $ 8,133 $ 58   $ 7,793 $ 340
Increase (Decrease) in Partners' Capital            
Net income 659 657 2   215 442
Cash distributions to partners (1,240) (1,238) (2)   (802) (436)
Sale of common units 1,121 1,121     1,099 22
Other comprehensive loss (518) (518)     (507) (11)
Other 3 3     1 2
Balance, end of period at Sep. 30, 2015 8,216 8,158 58   7,799 359
Balance, beginning of period at Dec. 31, 2015 7,939 7,881 58   7,580 301
Increase (Decrease) in Partners' Capital            
Net income 602 599 3   209 390
Cash distributions to partners (1,302) (1,299) (3)   (835) (464)
Sale of Series A preferred units 1,542 1,542   $ 1,509   33
Sale of common units 289 289     283 6
Other comprehensive loss 0          
Other 4 4   (1) 3 2
Balance, end of period at Sep. 30, 2016 $ 9,074 $ 9,016 $ 58 $ 1,508 $ 7,240 $ 268