Retirement Plans (Tables)

3 Months Ended

Mar. 31, 2023

Pension [Member]

Net Periodic Benefit Cost

	Pension Benefits
($ in millions)	For the three months ended March 31, 2023		For the three months ended March 31, 2022
Components of total pension benefit cost
Service cost	$	13	$	21
Interest cost on projected benefit obligation		33		24
Expected return on plan assets		(37)		(49)
Total pension benefit cost / (income)	$	9	$	(4)

OPEB [Member]

Net Periodic Benefit Cost

	Postretirement
($ in millions)	For the three months ended March 31, 2023		For the three months ended March 31, 2022
Components of net periodic postretirement benefit cost
Service cost	$	2	$	4
Interest cost on projected benefit obligation		8		6
Amortization of prior service credit (gain) loss recognized		(5)		(3)
OPEB remeasurement loss		20		-
Total periodic postretirement benefit cost	$	25	$	7