INTANGIBLE ASSETS

12 Months Ended

Dec. 31, 2017

Intangible Assets, Net (Excluding Goodwill) [Abstract]

Intangible Assets Disclosure [Text Block]

INTANGIBLE ASSETS

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

Intangible Assets at Dec 31	2017							2016
In millions	Gross Carrying Amount		Accum Amort			Net		Gross Carrying Amount		Accum Amort			Net
Intangible assets with finite lives:
Licenses and developed technology	$	33	$	(33	)	$	—	$	33	$	(33	)	$	—
Software	74		(49		)	25		70		(45		)	25
Total intangible assets	$	107	$	(82	)	$	25	$	103	$	(78	)	$	25

The following table provides information regarding amortization expense:

Amortization Expense
In millions	2017		2016		2015
Software 1	$	5	$	4	$	2

1. Included in “Cost of sales” in the consolidated statements of income.

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

Estimated Amortization Expense for Next Five Years
In millions
2018	$	6
2019	$	6
2020	$	6
2021	$	4
2022	$	2