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Goodwill (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended										6 Months Ended
	Jun. 30, 2012	Jun. 30, 2012 BP NGL Acquisition	Jun. 30, 2012 Other acquisitions	Jun. 30, 2012 Transportation	Jun. 30, 2012 Transportation BP NGL Acquisition	Jun. 30, 2012 Transportation Other acquisitions	Jun. 30, 2012 Facilities	Jun. 30, 2012 Facilities BP NGL Acquisition	Jun. 30, 2012 Supply and Logistics	Dec. 31, 2011 Supply and Logistics	Jun. 30, 2012 Supply and Logistics BP NGL Acquisition
Changes in goodwill
Balance at beginning of period	$ 1,854			$ 818			$ 609		$ 457	$ 427
Acquisitions		244	10		75	10		139			30
Foreign currency translation adjustments	(6)			(2)			(4)
Purchase price accounting adjustments and other	10			10
Balance at end of period	2,112			911			744		457	427
Accumulated impairment losses	$ 3

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Represents the purchase price accounting adjustments and other required to revise the carrying amount of goodwill to fair value.

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Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

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The aggregate amount of goodwill acquired in the period and allocated to the reportable segment. The value is stated at fair value based on the purchase price allocation.

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The accumulated impairment losses related to goodwill as of the balance sheet date.

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The increase (decrease) to the recorded value of goodwill for foreign currency translation adjustments.

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