Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Finite-Lived Intangible Assets

Intangible assets consists of the following:

	June 30, 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	$	(973)	$	114	$	1,087	$	(962)	$	125
Patents and licenses	14		(8)		6		14		(7)		7
Total intangible assets	$	1,101	$	(981)	$	120	$	1,101	$	(969)	$	132