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Asset Retirement Obligations

6 Months Ended

Jun. 30, 2012

Asset Retirement Obligation [Abstract]

A reconciliation of the asset retirement obligations for the six months ended June 30, 2012 follows (in millions):



Asset retirement obligations at December 31, 2011	$	1,442
Accretion	45
Revision in estimated cash flows	1
Liabilities settled	(1		)
Asset retirement obligations at June 30, 2012	$	1,487

- Definition

The entire disclosure for an asset retirement obligation and the associated long-lived asset. An asset retirement obligation is a legal obligation associated with the disposal or retirement from service of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

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