Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2023

Retirement Benefits [Abstract]

Schedule of Net Periodic Benefit (Income) Cost

Net periodic benefit cost (income) consisted of the following:

	Pension				Postretirement				Pension				Postretirement
	For the Nine Months Ended September 30,								For the Three Months Ended September 30,
(in millions)	2023		2022		2023		2022		2023		2022		2023		2022
Service cost	$	29	$	48	$	11	$	17	$	9	$	16	$	3	$	7
Interest cost	250		155		49		31		84		51		15		11
Expected return on plan assets	(364)		(370)		(5)		(10)		(121)		(123)		(1)		(4)
Amortization:
Net loss (gain)	3		72		(2)		14		1		24		(2)		6
Prior service cost (credit)	4		5		(30)		(34)		1		2		(10)		(11)
Net periodic benefit cost (income)	$	(78)	$	(90)	$	23	$	18	$	(26)	$	(30)	$	5	$	9