Retirement Plans (Tables)

9 Months Ended

Sep. 30, 2024

Retirement Benefits, Description [Abstract]

Schedule of Components of Net Periodic Benefit Cost

The components of net periodic benefit cost for the three and nine months ended September 30 were as follows:

COMPONENTS OF NET PERIODIC BENEFIT COST
	Three Months Ended September 30,				Nine Months Ended September 30,
(Dollars in millions)	2024		2023		2024		2023
Components of net periodic benefit cost
Interest cost	$	8	$	10	$	25	$	26
Expected return on plan assets	(8)		(9)		(24)		(25)
Amortization of unrecognized:
Actuarial (gain) loss	3		3		9		9
Net periodic benefit cost	$	3	$	4	$	10	$	10