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Net Income Per Limited Partner Unit (Details) (USD $) In Millions, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Basic and Diluted Net Income Per Limited Partner Unit |  |  |  |  |  |  |  |  |  |  |
General partner ownership interest (as a percent) |  |  |  |  |  |  |  |  | 2.00% |  |
Numerator for Basic and Diluted Net Income per Limited Partner Unit: |  |  |  |  |  |  |  |  |  |  |
Net income attributable to PAA | $ 309 | $ 231 | $ 292 | $ 528 | $ 320 | $ 165 | $ 378 | $ 230 | $ 1,361 | $ 1,094 | $ 966
Net income available to limited partners |  |  |  |  |  |  |  |  | 967 | 789 | 730
Denominator for Basic and Diluted Net Income per Limited Partner Unit: |  |  |  |  |  |  |  |  |  |  |
Basic weighted average number of limited partner units outstanding (in units) |  |  |  |  |  |  |  |  | 341 | 325 | 297
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |
Weighted average LTIP units (in units) |  |  |  |  |  |  |  |  | 2 | 3 | 2
Diluted weighted average number of limited partner units outstanding (in units) |  |  |  |  |  |  |  |  | 343 | 328 | 299
Basic and Diluted Net Income per Limited Partner Unit |  |  |  |  |  |  |  |  |  |  |
Basic net income per limited partner unit (in dollars per unit) | $ 0.59 | $ 0.38 | $ 0.58 | $ 1.28 | $ 0.70 | $ 0.27 | $ 0.93 | $ 0.52 | $ 2.82 | $ 2.41 | $ 2.46
Diluted net income per limited partner unit (in dollars per unit) | $ 0.58 | $ 0.38 | $ 0.57 | $ 1.27 | $ 0.69 | $ 0.27 | $ 0.93 | $ 0.51 | $ 2.80 | $ 2.40 | $ 2.44
Basic Net Income Per Limited Partner Unit |  |  |  |  |  |  |  |  |  |  |
Numerator for Basic and Diluted Net Income per Limited Partner Unit: |  |  |  |  |  |  |  |  |  |  |
Net income attributable to PAA |  |  |  |  |  |  |  |  | 1,361 | 1,094 | 966
General partner's incentive distribution |  |  |  |  |  |  |  |  | (375) | (289) | (221)
General partner 2% ownership |  |  |  |  |  |  |  |  | (19) | (16) | (15)
Net income available to limited partners |  |  |  |  |  |  |  |  | 967 | 789 | 730
Undistributed earnings allocated and distributions to participating securities |  |  |  |  |  |  |  |  | (7) | (5) |
Net income available to limited partners in accordance with the application of the two-class method for MLPs |  |  |  |  |  |  |  |  | 960 | 784 | 730
Diluted Net Income Per Limited Partner Unit |  |  |  |  |  |  |  |  |  |  |
Numerator for Basic and Diluted Net Income per Limited Partner Unit: |  |  |  |  |  |  |  |  |  |  |
Net income attributable to PAA |  |  |  |  |  |  |  |  | 1,361 | 1,094 | 966
General partner's incentive distribution |  |  |  |  |  |  |  |  | (375) | (289) | (221)
General partner 2% ownership |  |  |  |  |  |  |  |  | (19) | (16) | (15)
Net income available to limited partners |  |  |  |  |  |  |  |  | 967 | 789 | 730
Undistributed earnings allocated and distributions to participating securities |  |  |  |  |  |  |  |  | (6) | (4) |
Net income available to limited partners in accordance with the application of the two-class method for MLPs |  |  |  |  |  |  |  |  | $ 961 | $ 785 | $ 730

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- Definition Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055 + Details
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- Definition Per unit of ownership amount after tax of income (loss) available to limited partnership (LP) unit-holder and units that would have been outstanding assuming the issuance of limited partner units for dilutive potential units outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 4 -Section F + Details
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- Definition Per unit of ownership amount after tax of income (loss) available to outstanding limited partnership (LP) unit-holder. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 4 -Section F + Details
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- Definition Weighted average number of limited partnership units outstanding determined by relating the portion of time within a reporting period that general partnership units have been outstanding to the total time in that period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 4 -Section F + Details
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- Definition Weighted average number of limited partnership units outstanding determined by relating the portion of time within a reporting period that limited partnership units have been outstanding to the total time in that period. Used in the calculation of diluted net income or loss per limited partnership unit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 4 -Section F + Details
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