Retirement Plans (Tables)

3 Months Ended

Mar. 31, 2025

Pension [Member]

Net Periodic Benefit Cost

	Pension Benefits
	For the three months ended ‎March 31,
($ in millions)	2025		2024
Components of total pension benefit cost
Service cost	$	11	$	12
Interest cost on projected benefit obligation		32		30
Expected return on plan assets		(38)		(42)
Pension remeasurement gain		(44)		(74)
Net periodic pension (benefit) costs		(39)		(74)
Pension special termination benefit enhancements		-		6
Total pension (benefit) cost	$	(39)	$	(68)

OPEB [Member]

Net Periodic Benefit Cost

	Postretirement
	For the three months ended ‎March 31,
($ in millions)	2025		2024
Components of net periodic postretirement benefit cost
Service cost	$	1	$	1
Interest cost on projected benefit obligation		7		7
Amortization of prior service credit gain recognized		(6)		(6)
OPEB remeasurement (gain) loss		8		(9)
Net periodic postretirement (benefit) cost		10		(7)
OPEB special termination benefit enhancements		-		1
Total periodic postretirement (benefit) cost	$	10	$	(6)