Intangible Assets

3 Months Ended

Mar. 31, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

Intangible Assets

Intangible assets consists of the following:

	March 31, 2025						December 31, 2024
(Dollars in millions)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Acquired intangible assets	$	1,087	$	(967)	$	120	$	1,087	$	(962)	$	125
Patents and licenses	14		(8)		6		14		(7)		7
Total intangible assets	$	1,101	$	(975)	$	126	$	1,101	$	(969)	$	132

Amortization expense related to intangible assets was $5 million for the three months ended March 31, 2025 and 2024.