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Net Income Per Limited Partner Unit (Details) (USD $) In Millions, except Per Share data, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
Net Income Per Limited Partner Unit |  |  |  |
General partner ownership interest (as a percent) |  |  | 2.00% |
Basic Net Income per Limited Partner Unit |  |  |  |
Net income attributable to PAA | $ 323 | $ 231 | $ 994 | $ 1,052
Less: General partner's incentive distribution | (124) | (95) | (351) | (272)
Less: General partner 2% ownership | (4) | (3) | (13) | (16)
Net income available to limited partners | 195 | 133 | 630 | 764
Less: Undistributed earnings allocated and distributions to participating securities | (1) | (1) | (5) | (5)
Net income available to limited partners in accordance with application of the two-class method for MLPs | 194 | 132 | 625 | 759
Basic weighted average limited partner units outstanding (in units) | 370 | 343 | 365 | 340
Basic net income per limited partner unit (in dollars per unit) | $ 0.52 | $ 0.38 | $ 1.71 | $ 2.23
Diluted Net Income per Limited Partner Unit |  |  |  |
Net income attributable to PAA | 323 | 231 | 994 | 1,052
Less: General partner's incentive distribution | (124) | (95) | (351) | (272)
Less: General partner 2% ownership | (4) | (3) | (13) | (16)
Net income available to limited partners | 195 | 133 | 630 | 764
Less: Undistributed earnings allocated and distributions to participating securities | (1) | (1) | (5) | (4)
Net income available to limited partners in accordance with application of the two-class method for MLPs | $ 194 | $ 132 | $ 625 | $ 760
Basic weighted average limited partner units outstanding (in units) | 370 | 343 | 365 | 340
Effect of dilutive securities: |  |  |  |
Weighted average LTIP units (in units) | 1 | 2 | 2 | 2
Diluted weighted average limited partner units outstanding (in units) | 371 | 345 | 367 | 342
Diluted net income per limited partner unit (in dollars per unit) | $ 0.52 | $ 0.38 | $ 1.70 | $ 2.22

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- Definition Aggregate amount of net income allocated to limited partners in the calculated of diluted net income per limited partner unit. + References No definition available. + Details
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- Definition This element represents the net income (loss) available to limited partners in the calculation of basic net income per limited partner unit after making an adjustment in accordance with the application of the two-class method for Master Limited Partnerships (MLPs). + References No definition available. + Details
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- Definition This element represents the net income (loss) available to limited partners in the calculation of diluted net income per limited partner unit after making an adjustment in accordance with the application of the two-class method for Master Limited Partnerships (MLPs). + References No definition available. + Details
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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 Aggregate amount of net income allocated to limited partners. + 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 + 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 Amount of earnings (loss) distributed and earnings (loss) allocated to participating securities for the basic earnings (loss) per share or per unit calculation under the two-class method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 60B -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7655603&loc=SL5780133-109256 + Details
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- Definition Amount of earnings (loss) distributed and earnings (loss) allocated to participating securities for the diluted earnings (loss) per share or per unit calculation under the two-class method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 60B -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7655603&loc=SL5780133-109256 + 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. + 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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