XML 73 R13.htm IDEA: XBRL DOCUMENT

Asset Retirement Obligations

6 Months Ended

Jun. 30, 2012

Asset Retirement Obligation [Abstract]

Asset Retirement Obligation Disclosure [Text Block]

ASSET RETIREMENT OBLIGATIONS

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	$	1,593
Accretion	49
Revision in estimated cash flows	1
Liabilities settled	(2		)
Asset retirement obligations at June 30, 2012	$	1,641

- 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.

+ References+ Details