Landfill and Environmental Remediation Liabilities (Tables)

6 Months Ended

Jun. 30, 2011

Landfill and Environmental Remediation Liabilities (Tables) [Abstract]

Liabilities for landfill and environmental remediation costs

Liabilities for landfill and environmental remediation costs are presented in the table below (in millions):

	June 30, 2011						December 31, 2010
			Environmental						Environmental
	Landfill		Remediation		Total		Landfill		Remediation		Total
Current (in accrued liabilities)	$	104	$	42	$	146	$	105	$	43	$	148
Long-term		1,203		233		1,436		1,161		241		1,402
	$	1,307	$	275	$	1,582	$	1,266	$	284	$	1,550

Changes to landfill and environmental remediation liabilities

The changes to landfill and environmental remediation liabilities for the year ended December 31, 2010 and the six months ended June 30, 2011 are reflected in the table below (in millions):

				Environmental
	Landfill			Remediation
December 31, 2009	$	1,267		$	256
Obligations incurred and capitalized		47			—
Obligations settled		(86	)		(36	)
Interest accretion		82			5
Revisions in cost estimates and interest rate assumptions		(49	)		61
Acquisitions, divestitures and other adjustments		5			(2	)
December 31, 2010		1,266			284
Obligations incurred and capitalized		24			—
Obligations settled		(31	)		(16	)
Interest accretion		41			3
Revisions in cost estimates and interest rate assumptions		4			4
Acquisitions, divestitures and other adjustments		3			—
June 30, 2011	$	1,307		$	275