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Asset Retirement Obligations

3 Months Ended

Mar. 31, 2012

Asset Retirement Obligations [Abstract]

Note 5 – Asset Retirement Obligations

The change in our asset retirement obligations during the three months ended March 31, 2012 is set forth below:


	Three Months Ended March 31, 2012
	(in millions)
Asset retirement obligations as of the beginning of the period, including current portion	$	425.8
Liabilities settled		(3.0	)
Divestment of properties		(0.6	)
Accretion expense		8.3

Asset retirement obligations as of the end of the period, including current portion	$	430.5

- 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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