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	$	575	$	20		$	—		$	(49	)	$	—		$	546
Allowance for uncollectible accounts	52		3			—			(11		)	—			44
Reserves for environmental remediation costs	14		(1		)	—			—			—			13
Year ended December 31, 2011
Allowance for obsolescence of inventories	$	530	$	34		$	—		$	—		$	11		$	575
Allowance for uncollectible accounts	58		4			—			(10		)	—			52
Reserves for environmental remediation costs	17		(2		)	(1		)	—			—			14
Year ended December 31, 2010
Allowance for obsolescence of inventories	$	509	$	32		$	—		$	—		$	(11	)	$	530
Allowance for uncollectible accounts	58		5			—			(5		)	—			58
Reserves for environmental remediation costs	18		—			(1		)	—			—			17