Retirement Plans (Tables)

6 Months Ended

Jun. 30, 2021

Pension [Member]

Net Periodic Benefit Cost

	Successor		Predecessor
	Pension		Pension
	For the two months		For the one month		For the three months
	ended June 30,		ended April 30,		ended June 30,
($ in millions)	2021		2021		2020
Components of total pension benefit cost
Service cost	$	13	$	8	$	24
Interest cost on projected benefit obligation		18		8		28
Expected return on plan assets		(31)		(16)		(39)
Amortization of unrecognized loss		-		6		30
Net periodic pension benefit cost		-		6		43
Pension settlement costs		-		-		56
Gain on disposal, net		-		-		(50)
Total pension benefit cost	$	-	$	6	$	49
	Successor		Predecessor
	Pension		Pension
	For the two months		For the four months		For the six months
	ended June 30,		ended April 30,		ended June 30,
($ in millions)	2021		2021		2020
Components of total pension benefit cost
Service cost	$	13	$	32	$	49
Interest cost on projected benefit obligation		18		31		58
Expected return on plan assets		(31)		(61)		(89)
Amortization of unrecognized loss		-		24		47
Net periodic pension benefit cost		-		26		65
Pension settlement costs		-		-		159
Gain on disposal, net		-		-		(50)
Total pension benefit cost	$	-	$	26	$	174

Postretirement [Member]

Net Periodic Benefit Cost

	Successor		Predecessor
	Postretirement		Postretirement
	For the two months		For the one month		For the three months
	ended June 30,		ended April 30,		ended June 30,
($ in millions)	2021		2021		2020
Components of net periodic postretirement benefit cost
Service cost	$	3	$	2	$	5
Interest cost on projected benefit obligation		5		2		8
Amortization of prior service cost (credit)		(1)		(3)		(8)
Amortization of unrecognized (gain) loss		13		2		1
Net periodic postretirement benefit cost		20		3		6
One-time gain on sale		-		-		(24)
Net periodic postretirement benefit cost	$	20	$	3	$	(18)
	Successor		Predecessor
	Postretirement		Postretirement
	For the two months		For the four months		For the six months
	ended June 30,		ended April 30,		ended June 30,
($ in millions)	2021		2021		2020
Components of net periodic postretirement benefit cost
Service cost	$	3	$	7	$	10
Interest cost on projected benefit obligation		5		9		16
Amortization of prior service cost (credit)		(1)		(10)		(16)
Amortization of unrecognized (gain) loss		13		5		3
Net periodic postretirement benefit cost		20		11		13
One-time gain on sale		-		-		(24)
Net periodic postretirement benefit cost	$	20	$	11	$	(11)