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Derivatives and Risk Management Activities (Details 2) (USD $) In Millions, unless otherwise specified								1 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2014 Interest Rate Derivatives	Sep. 30, 2014 10 forward starting interest rate swaps (30-year) PAA Cash flow hedge contract	Apr. 23, 2014 Treasury locks entered into in anticipation of issuance of 4.70% senior notes due 2044 PAA	Apr. 30, 2014 Treasury locks entered into in anticipation of issuance of 4.70% senior notes due 2044 PAA Cash flow hedge	Apr. 23, 2014 Treasury locks entered into in anticipation of issuance of 4.70% senior notes due 2044 PAA Cash flow hedge contract
Interest Rate Risk Hedging
Net deferred gains/(losses) from interest rate risk hedging included in AOCI	$ (308)	$ (97)	$ (19)	$ 79	$ (108)
Number of interest rate derivatives (in contracts)						10			5
Notional amount of derivatives						250	250		250
Rate of fixed interest to be received on interest rate swap (as a percent)						3.60%			3.62%
Cash payment for (proceeds from) termination of interest rate swaps								$ 7

X

- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 11

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Average fixed interest rate related to the group of interest rate derivatives.

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- Definition

Number of interest rate derivative instruments held by the entity at the reporting date.

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-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

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The net cash outflow or inflow for a financial contract that meets the hedge criteria as either cash flow hedge, fair value hedge or hedge of net investment in foreign operations.

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