Employee Benefits (Tables)

6 Months Ended

Jun. 30, 2023

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 June 30,	2023		2022		2023		2022
Service cost - Cost of services	$	45	$	58	$	12	$	20
Service cost - Selling, general and administrative expense	7		8		2		4
Service cost	$	52	$	66	$	14	$	24
Amortization of prior service cost (credit)	$	28	$	15	$	(104)	$	(110)
Expected return on plan assets	(253)		(294)		(8)		(7)
Interest cost	188		114		136		83
Remeasurement loss, net	—		198		—		—
Other components	$	(37)	$	33	$	24	$	(34)
Total	$	15	$	99	$	38	$	(10)

	(dollars in millions)
	Pension				Health Care and Life
Six Months Ended June 30,	2023		2022		2023		2022
Service cost - Cost of services	$	91	$	116	$	23	$	40
Service cost - Selling, general and administrative expense	14		16		4		7
Service cost	$	105	$	132	$	27	$	47
Amortization of prior service cost (credit)	$	56	$	30	$	(209)	$	(313)
Expected return on plan assets	(506)		(591)		(15)		(14)
Interest cost	376		224		272		166
Remeasurement loss, net	—		198		—		—
Other components	$	(74)	$	(139)	$	48	$	(161)
Total	$	31	$	(7)	$	75	$	(114)