XML 42 R11.htm IDEA: XBRL DOCUMENT

Asset Retirement Obligations

6 Months Ended

Jun. 30, 2012

Asset Retirement Obligations [Abstract]

Note 5 – Asset Retirement Obligations

The change in our asset retirement obligations during the six months ended June 30, 2012 is set forth below:


	Six Months Ended June 30, 2012
	(in millions)
Asset retirement obligations as of the beginning of the period, including current portion	$	425.8
Liabilities settled		(21.9	)
Liabilities assumed		14.5
Divestment of properties		(7.6	)
Accretion expense		16.5

Asset retirement obligations as of the end of the period, including current portion	$	427.3

- 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