Accrued Expenses and Other Long-Term Liabilities (Tables)

12 Months Ended

Dec. 31, 2011

Accrued expenses and other long-term liabilities consisted of the following as of December 31 (in millions):



	Accrued Expenses				Other Long-Term Liabilities
	2011		2010		2011		2010
Defined benefit plan liabilities (see Note 14)	$	37	$	54	$	796	$	636
Wage and other employee-related liabilities	259		172		79		85
Uncertain income tax position liabilities (see Note 16)	—		—		337		343
Other tax liabilities	—		—		103		106
Environmental liabilities	39		40		235		228
Accrued interest expense	108		116		—		—
Derivative liabilities	25		39		—		—
Insurance liabilities	13		13		79		80
Asset retirement obligations	6		20		81		81
Other	108		136		171		208
Accrued expenses and other long-term liabilities	$	595	$	590	$	1,881	$	1,767

Changes in our environmental liabilities were as follows (in millions):



	Year Ended December 31,
	2011			2010			2009
Balance as of beginning of year	$	268		$	279		$	297
Pembroke Acquisition	30			—			—
Additions to liability	18			50			21
Reductions to liability	(5		)	(21		)	(5		)
Payments, net of third-party recoveries	(35		)	(42		)	(40		)
Foreign currency translation	(2		)	2			6
Balance as of end of year	$	274		$	268		$	279

Changes in our asset retirement obligations were as follows (in millions).



	Year Ended December 31,
	2011			2010			2009
Balance as of beginning of year	$	101		$	179		$	72
Additions to accrual	4			3			98
Reductions to accrual	—			(34		)	—
Accretion expense	4			7			14
Settlements	(22		)	(54		)	(5		)
Balance as of end of year	$	87		$	101		$	179