INTANGIBLE ASSETS (Tables)

3 Months Ended

Mar. 31, 2021

Intangible Assets, Net (Excluding Goodwill) [Abstract]

Intangible Assets

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

Intangible Assets	Mar 31, 2021						Dec 31, 2020
In millions	Gross Carrying Amount		Accum Amort		Net		Gross Carrying Amount		Accum Amort		Net
Intangible assets with finite lives:
Developed technology	$	33	$	(33)	$	—	$	33	$	(33)	$	—
Software	81		(66)		15		80		(64)		16
Total intangible assets	$	114	$	(99)	$	15	$	113	$	(97)	$	16

Schedule of Expected Amortization Expense [Table Text Block]

Total estimated amortization expense for 2021 and the five succeeding fiscal years, including amounts expected to be capitalized, is as follows:

Estimated Amortization Expense
In millions
2021	$	6
2022	$	5
2023	$	3
2024	$	1
2025	$	1
2026	$	—