INTANGIBLE ASSETS (Notes)

12 Months Ended

Dec. 31, 2023

Intangible Assets, Net (Excluding Goodwill) [Abstract]

Intangible Assets

INTANGIBLE ASSETS

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

Intangible Assets at Dec 31	2023						2022
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)	$	—
Software1	67		(60)		7		76		(67)		9
Total intangible assets	$	100	$	(93)	$	7	$	109	$	(100)	$	9

1.In 2023, there was a $10 million decrease to the Gross Carrying Amount and Accumulated Amortization balances due to the Corporation's contribution of certain assets to the TDCC Infrastructure Subsidiary. See Note 17 for additional information.

The following table provides information regarding amortization expense:

Amortization Expense
In millions	2023		2022		2021
Software, included in "Cost of sales"	$	3	$	5	$	6

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

Estimated Amortization Expense for Next Five Years
In millions
2024	$	2
2025	$	2
2026	$	1
2027	$	1
2028	$	1