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Operating Segments (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2015 segment | Mar. 31, 2014
Operating Segments |  |
Operating segments number | 3 us-gaap_NumberOfOperatingSegments |
Revenues: |  |
Revenues | $ 5,942 us-gaap_Revenues | $ 11,684 us-gaap_Revenues
Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments |  |
Equity earnings in unconsolidated entities | 37 us-gaap_IncomeLossFromEquityMethodInvestments | 20 us-gaap_IncomeLossFromEquityMethodInvestments
Segment profit | 513 us-gaap_GrossProfit | 609 us-gaap_GrossProfit
Maintenance capital | 50 paa_MaintenanceCapital | 46 paa_MaintenanceCapital
Transportation |  |
Revenues: |  |
Revenues | 185 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentTransportationMember | 181 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentTransportationMember
Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments |  |
Equity earnings in unconsolidated entities | 37 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentTransportationMember | 20 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentTransportationMember
Segment profit | 241 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentTransportationMember | 206 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentTransportationMember
Maintenance capital | 33 paa_MaintenanceCapital / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentTransportationMember | 34 paa_MaintenanceCapital / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentTransportationMember
Facilities |  |
Revenues: |  |
Revenues | 125 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentFacilitiesMember | 157 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentFacilitiesMember
Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments |  |
Segment profit | 142 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentFacilitiesMember | 154 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentFacilitiesMember
Maintenance capital | 15 paa_MaintenanceCapital / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentFacilitiesMember | 10 paa_MaintenanceCapital / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentFacilitiesMember
Supply and Logistics |  |
Revenues: |  |
Revenues | 5,632 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentSupplyAndLogisticsMember | 11,346 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentSupplyAndLogisticsMember
Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments |  |
Segment profit | 130 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentSupplyAndLogisticsMember | 249 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentSupplyAndLogisticsMember
Maintenance capital | 2 paa_MaintenanceCapital / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentSupplyAndLogisticsMember | 2 paa_MaintenanceCapital / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentSupplyAndLogisticsMember
Interest expense related to hedged inventory purchases | 1 paa_InterestExpenseHedgedInventoryPurchases / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentSupplyAndLogisticsMember | 2 paa_InterestExpenseHedgedInventoryPurchases / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentSupplyAndLogisticsMember
Operating Segments |  |
Revenues: |  |
Revenues | 6,291 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember | 12,054 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember
Operating Segments | Transportation |  |
Revenues: |  |
Revenues | 400 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentTransportationMember | 387 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentTransportationMember
Operating Segments | Facilities |  |
Revenues: |  |
Revenues | 257 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentFacilitiesMember | 299 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentFacilitiesMember
Operating Segments | Supply and Logistics |  |
Revenues: |  |
Revenues | 5,634 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentSupplyAndLogisticsMember | 11,368 us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentSupplyAndLogisticsMember
Intersegment |  |
Revenues: |  |
Revenues | (349)us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember | (370)us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember
Intersegment | Transportation |  |
Revenues: |  |
Revenues | (215)us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentTransportationMember | (206)us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentTransportationMember
Intersegment | Facilities |  |
Revenues: |  |
Revenues | (132)us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentFacilitiesMember | (142)us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentFacilitiesMember
Intersegment | Supply and Logistics |  |
Revenues: |  |
Revenues | $ (2)us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentSupplyAndLogisticsMember | $ (22)us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember / us-gaap_StatementBusinessSegmentsAxis = paa_SegmentSupplyAndLogisticsMember

X
- Definition The interest expense incurred related to hedged inventory purchases, which is included in segment profit. + References No definition available. + Details
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- Definition Capital expenditures for the replacement of partially or fully depreciated assets in order to maintain the operating and/or earnings capacity of the company's existing assets. + References No definition available. + Details
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- Definition Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1,2) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 9 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35755396&loc=d3e33749-111570 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.12) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 7 + Details
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- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. + References No definition available. + Details
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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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