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CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN PARTNERS' CAPITAL - USD ($) $ in Millions | Total | Noncontrolling Interests | Partners’ Capital Excluding Noncontrolling Interests | Limited Partners Series A Preferred Units Partners’ Capital Excluding Noncontrolling Interests | Limited Partners Common Units Partners’ Capital Excluding Noncontrolling Interests | AAP Partners’ Capital Excluding Noncontrolling Interests
--- | --- | --- | --- | --- | --- | ---
Balance, beginning of period at Dec. 31, 2015 | $ 7,939 | $ 58 | $ 7,881 |  | $ 7,580 | $ 301
Increase (Decrease) in Partners' Capital |  |  |  |  |  |
Net income | 203 | 1 | 202 |  | 55 | 147
Cash distributions to partners | (434) | (1) | (433) |  | (278) | (155)
Sale of Series A preferred units | 1,542 |  | 1,542 | $ 1,509 |  | 33
Other comprehensive income | 118 |  | 118 |  | 115 | 3
Other | 3 |  | 3 |  | 2 | 1
Balance, end of period at Mar. 31, 2016 | 9,371 | 58 | 9,313 | 1,509 | 7,474 | $ 330
Balance, beginning of period at Dec. 31, 2016 | 8,816 | 57 | 8,759 | 1,508 | 7,251 |
Increase (Decrease) in Partners' Capital |  |  |  |  |  |
Net income | 444 |  | 444 |  | 444 |
Cash distributions to partners | (372) | (1) | (371) |  | (371) |
Sales of common units | 1,664 |  | 1,664 |  | 1,664 |
Other comprehensive income | 36 |  | 36 |  | 36 |
Other | 2 |  | 2 | (1) | 3 |
Balance, end of period at Mar. 31, 2017 | $ 10,590 | $ 56 | $ 10,534 | $ 1,507 | $ 9,027 |

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