Schedule II - Valuation And Qualifying Accounts And Reserves

12 Months Ended

Dec. 31, 2012

Valuation And Qualifying Accounts [Abstract]

Schedule II - Valuation And Qualifying Accounts And Reserves

Schedule II—Valuation and Qualifying Accounts and Reserves

(in millions)

	Balance at beginning of year		Changes charged to statement of operations accounts			Payments			Write-offs (net of recoveries)			Sales, retire- ments and transfers			Balance at end of year
Year ended December 31, 2012
Allowance for obsolescence of inventories	$	530	$	18		$	—		$	(45	)	$	—		$	503
Allowance for uncollectible accounts		51		3			—			(11	)		—			43
Reserves for environmental remediation costs		14		(1	)		—			—			—			13
Year ended December 31, 2011
Allowance for obsolescence of inventories	$	479	$	31		$	—		$	—		$	20		$	530
Allowance for uncollectible accounts		57		4			—			(10	)		—			51
Reserves for environmental remediation costs		17		(2	)		(1	)		—			—			14
Year ended December 31, 2010
Allowance for obsolescence of inventories	$	457	$	30		$	—		$	—		$	(8	)	$	479
Allowance for uncollectible accounts		57		5			—			(5	)		—			57
Reserves for environmental remediation costs		18		—			(1	)		—			—			17