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CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN PARTNERS' CAPITAL - USD ($) $ in Millions | 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 | Partners' Capital Excluding Noncontrolling Interests | Noncontrolling Interests | Total
--- | --- | --- | --- | --- | --- | ---
Balance, beginning of period at Dec. 31, 2014 |  | $ 7,793 | $ 340 | $ 8,133 | $ 58 | $ 8,191
Increase (Decrease) in Partners' Capital |  |  |  |  |  |
Net income |  | 138 | 145 | 283 | 1 | 284
Distributions |  | (254) | (136) | (390) | (1) | (391)
Sale of common units |  | 1,099 | 22 | 1,121 |  | 1,121
Other comprehensive income/(loss) |  | (369) | (7) | (376) |  | (376)
Other |  | 6 | 1 | 7 |  | 7
Balance, end of period at Mar. 31, 2015 |  | 8,413 | 365 | 8,778 | 58 | 8,836
Balance, beginning of period at Dec. 31, 2015 |  | 7,580 | 301 | 7,881 | 58 | 7,939
Increase (Decrease) in Partners' Capital |  |  |  |  |  |
Net income |  | 55 | 147 | 202 | 1 | 203
Distributions |  | (278) | (155) | (433) | (1) | (434)
Sale of Series A preferred units | $ 1,509 |  | 33 | 1,542 |  | 1,542
Other comprehensive income/(loss) |  | 115 | 3 | 118 |  | 118
Other |  | 2 | 1 | 3 |  | 3
Balance, end of period at Mar. 31, 2016 | $ 1,509 | $ 7,474 | $ 330 | $ 9,313 | $ 58 | $ 9,371

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