Intangible Assets

12 Months Ended

Dec. 31, 2011

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets Disclosure [Text Block]

INTANGIBLE ASSETS

The following table provides information regarding the Corporation's intangible assets:

Intangible Assets at December 31			2011							2010
In millions	Gross Carrying Amount		Accumulated Amortization			Net		Gross Carrying Amount		Accumulated Amortization			Net
Intangible assets with finite lives:
Licenses and intellectual property	$	33	$	(33	)	$	—	$	33	$	(33	)	$	—
Patents	—		—			—		2		(2		)	—
Software	116		(108		)	8		112		(105		)	7
Total intangible assets	$	149	$	(141	)	$	8	$	147	$	(140	)	$	7

The following table provides information regarding amortization expense:

Amortization Expense In millions	2011		2010		2009
Software, included in “Cost of sales”	$	3	$	4	$	5

Total estimated amortization expense for the next five fiscal years is as follows:

Estimated Amortization Expense for Next Five Years In millions
2012	$	3
2013	$	2
2014	$	1
2015	$	1
2016	$	1