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CONSOLIDATED STATEMENTS OF CHANGES IN PARTNERS' CAPITAL (USD $) In Millions, except Share data, unless otherwise specified | Total | Common Units | General Partner | Partners' Capital Excluding Noncontrolling Interests | Noncontrolling Interests
--- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2009 | $ 4,159 | $ 3,965 | $ 131 | $ 4,096 | $ 63
Balance (in units) at Dec. 31, 2009 |  | 272,300,000 |  |  |
Increase (Decrease) in Partners' Capital |  |  |  |  |
Net income | 514 | 330 | 175 | 505 | 9
Sale of noncontrolling interest in a subsidiary (Note 10) | 268 | 99 | 2 | 101 | 167
Distributions | (692) | (512) | (170) | (682) | (10)
Issuance of common units | 296 | 290 | 6 | 296 |
Issuance of common units (in units) | 9,600,000 | 9,600,000 |  |  |
Issuance of common units under LTIP | 16 | 16 |  | 16 |
Issuance of common units under LTIP (in units) |  | 500,000 |  |  |
Equity compensation expense (Note 15) | 16 | 4 | 9 | 13 | 3
Other comprehensive income/(loss) | (5) | (5) |  | (5) |
Other | 1 | 2 |  | 2 | (1)
Balance at Dec. 31, 2010 | 4,573 | 4,189 | 153 | 4,342 | 231
Balance (in units) at Dec. 31, 2010 |  | 282,400,000 |  |  |
Increase (Decrease) in Partners' Capital |  |  |  |  |
Net income | 994 | 730 | 236 | 966 | 28
Sale of noncontrolling interest in a subsidiary (Note 10) | 370 | 63 | 1 | 64 | 306
Distributions | (831) | (575) | (216) | (791) | (40)
Issuance of common units | 889 | 870 | 19 | 889 |
Issuance of common units (in units) | 27,900,000 | 27,900,000 |  |  |
Issuance of common units under LTIP | 15 | 15 |  | 15 |
Issuance of common units under LTIP (in units) |  | 500,000 |  |  |
Equity compensation expense (Note 15) | 28 | 16 | 9 | 25 | 3
Other comprehensive income/(loss) | (64) | (59) | (1) | (60) | (4)
Balance at Dec. 31, 2011 | 5,974 | 5,249 | 201 | 5,450 | 524
Balance (in units) at Dec. 31, 2011 | 310,753,874 | 310,800,000 |  |  |
Increase (Decrease) in Partners' Capital |  |  |  |  |
Net income | 1,127 | 789 | 305 | 1,094 | 33
Distributions | (1,017) | (684) | (285) | (969) | (48)
Issuance of common units | 979 | 959 | 20 | 979 |
Issuance of common units (in units) | 23,500,000 | 23,500,000 |  |  |
Issuance of common units under LTIP | 34 | 33 | 1 | 34 |
Issuance of common units under LTIP (in units) |  | 1,000,000 |  |  |
Equity compensation expense (Note 15) | 28 | 18 | 6 | 24 | 4
Distribution equivalent right payments (Note 15) | (5) | (4) |  | (4) | (1)
Other comprehensive income/(loss) | 26 | 28 | 1 | 29 | (3)
Balance at Dec. 31, 2012 | $ 7,146 | $ 6,388 | $ 249 | $ 6,637 | $ 509
Balance (in units) at Dec. 31, 2012 | 335,283,874 | 335,300,000 |  |  |

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