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Partners' Capital and Distributions (Details 8) (USD $) In Millions, unless otherwise specified | 0 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Oct. 02, 2012 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Partners' Capital and Distributions |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to Plains |  | $ 320 | $ 165 | $ 378 | $ 230 | $ 278 | $ 281 | $ 225 | $ 182 | $ 1,094 | $ 966 | $ 505
Transfers to the noncontrolling interests: |  |  |  |  |  |  |  |  |  |  |  |
Increase in capital from sale of PNG units |  |  |  |  |  |  |  |  |  |  | 64 | 101
Change from net income attributable to Plains and net transfers to the noncontrolling interest |  |  |  |  |  |  |  |  |  | 1,094 | 1,030 | 606
Changes in the noncontrolling interests in partners' capital |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  |  | 524 |  |  |  |  | 524 |  |
Sale of noncontrolling interest in a subsidiary (Note 10) |  |  |  |  |  |  |  |  |  |  | 370 | 268
Net income attributable to noncontrolling interests |  | 330 | 173 | 386 | 237 | 288 | 288 | 233 | 185 | 1,127 | 994 | 514
Equity compensation expense (Note 15) |  |  |  |  |  |  |  |  |  | 28 | 28 | 16
Distribution equivalent right payments (Note 15) |  |  |  |  |  |  |  |  |  | (5) |  |
Other comprehensive income/(loss): |  |  |  |  |  |  |  |  |  |  |  |
Reclassification adjustments |  |  |  |  |  |  |  |  |  | (62) | 131 | (24)
Net deferred gain/(loss) on cash flow hedges |  |  |  |  |  |  |  |  |  | 44 | (154) | (73)
Other |  |  |  |  |  |  |  |  |  |  |  | 1
Ending Balance |  | 509 |  |  |  | 524 |  |  |  | 509 | 524 |
LTIP Vesting |  |  |  |  |  |  |  |  |  |  |  |
Unit split conversion ratio | 2 |  |  |  |  |  |  |  |  |  |  |
Issuance of common units under LTIP |  |  |  |  |  |  |  |  |  | 34 | 15 | 16
Noncontrolling Interests |  |  |  |  |  |  |  |  |  |  |  |
Changes in the noncontrolling interests in partners' capital |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  |  | 524 |  |  |  | 231 | 524 | 231 | 63
Sale of noncontrolling interest in a subsidiary (Note 10) |  |  |  |  |  |  |  |  |  |  | 306 | 167
Net income attributable to noncontrolling interests |  |  |  |  |  |  |  |  |  | 33 | 28 | 9
Distribution to noncontrolling interest |  |  |  |  |  |  |  |  |  | (48) | (40) | (10)
Equity compensation expense (Note 15) |  |  |  |  |  |  |  |  |  | 4 | 3 | 3
Distribution equivalent right payments (Note 15) |  |  |  |  |  |  |  |  |  | (1) |  |
Other comprehensive income/(loss): |  |  |  |  |  |  |  |  |  |  |  |
Reclassification adjustments |  |  |  |  |  |  |  |  |  | (4) |  |
Net deferred gain/(loss) on cash flow hedges |  |  |  |  |  |  |  |  |  | 1 | (4) |
Other |  |  |  |  |  |  |  |  |  |  |  | (1)
Ending Balance |  | 509 |  |  |  | 524 |  |  |  | 509 | 524 | 231
PAA Long-term Incentive Plan Awards |  |  |  |  |  |  |  |  |  |  |  |
LTIP Vesting |  |  |  |  |  |  |  |  |  |  |  |
Unit split conversion ratio |  |  |  |  |  |  |  |  |  | 2 |  |
Issuance of common units under LTIP (in units) |  |  |  |  |  |  |  |  |  | 1.0 |  |
Issuance of common units under LTIP |  |  |  |  |  |  |  |  |  | $ 34 |  |

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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 27 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A3 -Appendix A Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 26 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 20 -Article 7 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.31) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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