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CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN PARTNERS' CAPITAL - USD ($) $ in Millions | Total | Partners’ Capital Excluding Noncontrolling Interests | Noncontrolling Interests | Common Units | 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, 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
Sales of common units | 289 | 289 |  |  |  | 283 | 6
Other comprehensive income | 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
Balance, beginning of period at Dec. 31, 2016 | 8,816 | 8,759 | 57 |  | 1,508 | 7,251 |
Increase (Decrease) in Partners' Capital |  |  |  |  |  |  |
Net income | 667 | 665 | 2 |  |  | 665 |
Cash distributions to partners | (1,170) | (1,168) | (2) |  |  | (1,168) |
Sales of common units | 1,664 | 1,664 |  | $ 1,664 |  | 1,664 |
Acquisition of interest in Advantage Joint Venture (Note 6) | 40 | 40 |  |  |  | 40 |
Other comprehensive income | 256 | 256 |  |  |  | 256 |
Other | 7 | 7 |  |  | (2) | 9 |
Balance, end of period at Sep. 30, 2017 | $ 10,280 | $ 10,223 | $ 57 |  | $ 1,506 | $ 8,717 |

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