Retirement Plans (Tables)

3 Months Ended

Mar. 31, 2022

Retirement Plans [Abstract]

Net Periodic Benefit Cost

	Successor		Predecessor
	Pension Benefits
	For the three months ended March 31,		For the three months ended March 31,
($ in millions)	2022		2021
Components of total pension benefit cost
Service cost	$	21	$	24
Interest cost on projected benefit obligation		24		23
Expected return on plan assets		(49)		(45)
Amortization of unrecognized loss		-		18
Total pension benefit cost	$	(4)	$	20
	Successor		Predecessor
	Postretirement Benefits
	For the three months ended March 31,		For the three months ended March 31,
($ in millions)	2022		2021
Components of net periodic postretirement benefit cost
Service cost	$	4	$	5
Interest cost on projected benefit obligation		6		7
Amortization of prior service cost (credit)		(3)		(7)
Amortization of unrecognized loss		-		3
Net periodic postretirement benefit cost	$	7	$	8