Non-Operating Income, Net (Tables)

12 Months Ended

Dec. 31, 2024

Nonoperating Income (Expense) [Abstract]

Schedule of Non-Operating (Income) Expense

	Year Ended December 31,
	2024		2023		2022
	(Dollars in millions)
Equity income of affiliated companies	$	(2)	$	(7)	$	(7)
Interest income	(3)		(7)		(2)
Pension (income) — non service	(13)		(7)		(37)
Foreign exchange loss	4		6		2
Loss on remeasurement (1)	—		13		—
Others, net	1		—		(3)
	$	(13)	$	(2)	$	(47)

(1)    Relates to the loss on remeasurement of the Series A Preferred Stock Agreements related to the Transaction. Refer to Note 21, Equity.