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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

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