Employee Benefits (Tables)

3 Months Ended

Mar. 31, 2025

Retirement Benefits [Abstract]

Benefit or (Income) Cost Related to Pension and Postretirement Health Care and Life Insurance

The following table summarizes the components of net periodic benefit cost (income) related to our pension and postretirement health care and life insurance plans:

	(dollars in millions)
	Pension				Health Care and Life
Three Months Ended March 31,	2025		2024		2025		2024
Service cost - Cost of services	$	34	$	41	$	7	$	11
Service cost - Selling, general and administrative expense	5		7		2		2
Service cost	$	39	$	48	$	9	$	13
Amortization of prior service cost (credit)	$	28	$	28	$	(32)	$	(32)
Expected return on plan assets	(134)		(208)		(7)		(7)
Interest cost	103		157		136		135
Remeasurement gain, net	—		(73)		—		—
Other components	$	(3)	$	(96)	$	97	$	96
Total	$	36	$	(48)	$	106	$	109