Retirement Plans (Tables)

12 Months Ended

Dec. 31, 2020

Retirement Plans [Abstract]

Projected Benefit Obligation, Fair Values Of Plan Assets And Amounts Recognized In The Balance Sheet

($ in millions)	2020		2019
Change in projected benefit obligation (PBO)
PBO at beginning of year	$	3,726	$	3,173
Service cost		95		82
Interest cost		108		130
Actuarial (gain) loss		506		603
Benefits paid		(73)		(65)
Impact of Divestiture of Northwest Operations(1)		(189)		-
Settlements		(465)		(235)
Special termination benefits		-		38
PBO at end of year	$	3,708	$	3,726
Change in plan assets
Fair value of plan assets at beginning of year	$	2,730	$	2,348
Fair value of plan assets for the Northwest Operations		(70)		-
Actual return on plan assets		321		516
Employer contributions		64		166
Settlements		(465)		(235)
Benefits paid		(73)		(65)
Fair value of plan assets at end of year	$	2,507	$	2,730
Funded status	$	(1,201)	$	(996)
Amounts recognized in the consolidated balance sheet
Pension and other postretirement benefits - current	$	-	$	-
Pension and other postretirement benefits - noncurrent	$	(1,201)	$	(996)
Accumulated other comprehensive loss	$	915	$	899

⁽¹⁾ Includes a gain of $20 million related to the elimination of future compensation increases as a result of the divestiture of the Northwest Operations.

Net Periodic Benefit Cost

($ in millions)	2020		2019		2018
Components of total pension benefit cost
Service cost	$	95	$	82	$	90
Interest cost on projected benefit obligation		108		130		125
Expected return on plan assets		(171)		(172)		(192)
Amortization of unrecognized loss		99		58		24
Net periodic pension benefit cost		131		98		47
Pension settlement costs		159		57		41
Pension special termination benefit enhancements		-		38		-
Gain on disposal, net		(38)		-		-
Total pension benefit cost	$	252	$	193	$	88

Weighted Average Asset Allocations, By Asset Category

	2020		2019
Asset category:
Equity securities	49	%	49	%
Debt securities	37	%	39	%
Alternative investments	14	%	12	%
Total	100	%	100	%

Expected Benefit Payments Over The Next Ten Years

($ in millions)	Amount
2021	$	255
2022		252
2023		253
2024		256
2025		257
2026-2030		1,239
Total	$	2,512

Schedule Of Assumptions Used

	2020		2019		2018
Discount rate - used at year end to value obligation	2.60	%	3.40	%	4.30	%
Discount rate - used at beginning of year to compute annual cost	3.40	%	4.30	%	3.70	%
Expected long-term rate of return on plan assets	7.50	%	7.50	%	7.50	%
Rate of increase in compensation levels	2.00	%	2.00	%	2.00	%

Schedule Of Changes In Projected benefit Obligations For OPEB

($ in millions)	2020		2019
Change in benefit obligation
Benefit obligation at beginning of year	$	972	$	965
Impact of Divestiture of Northwest Operations		(31)		-
Service cost		20		20
Interest cost		33		41
Plan amendments		-		(149)
Plan participants' contributions		9		7
Actuarial loss		100		129
Benefits paid		(61)		(47)
Special termination benefits		-		6
Benefit obligation at end of year	$	1,042	$	972
Change in plan assets
Fair value of plan assets at beginning of year	$	-	$	-
Plan participants' contributions		9		7
Employer contribution		52		40
Benefits paid		(61)		(47)
Fair value of plan assets at end of year	$	-	$	-
Funded status	$	(1,042)	$	(972)
Amounts recognized in the consolidated balance sheet
Pension and other postretirement benefits - current	$	(48)	$	(43)
Pension and other postretirement benefits - noncurrent	$	(994)	$	(900)
Pension and other postretirement benefits - AHFS*	$	-	$	(29)
Accumulated other comprehensive (gain) loss	$	74	$	(45)
* Assets Held for Sale

Schedule Of Net Benefit Costs For OPEB

($ in millions)	2020		2019		2018
Components of total postretirement benefit cost
Service cost	$	20	$	20	$	21
Interest cost on projected benefit obligation		33		41		38
Amortization of prior service credit		(32)		(11)		(9)
Amortization of unrecognized (gain) loss		6		(4)		3
Net periodic postretirement benefit cost		27		46		53
OPEB special termination benefit enhancements		-		6		-
Gain on disposal, net		(24)		-		-
Total postretirement benefit cost	$	3	$	52	$	53

Schedule Of Assumptions Used For OPEB

	2020	2019	2018
Discount rate - used at year end to value obligation	2.60% - 2.80%	3.40% - 3.50%	4.30% - 4.40%
Discount rate - used to compute annual cost	3.40% - 3.50%	4.30% - 4.40%	3.70% - 3.80%

Schedule Of Expected Benefit Payments For OPEB

($ in millions)	Gross Benefit		Medicare Part D Subsidy		Total
2021	$	49	$	-	$	49
2022		48		-		48
2023		48		-		48
2024		52		-		52
2025		48		-		48
2026-2030		278		2		280
Total	$	523	$	2	$	525

Net Periodic Benefit Cost Not Yet Recognized

	Pension Plan				OPEB
($ in millions)	2020		2019		2020		2019
Net actuarial loss	$	915	$	899	$	192	$	105
Prior service credit		-		-		(118)		(150)
Total	$	915	$	899	$	74	$	(45)

Amounts Recognized As A Component Of AOCI

	Pension Plan				OPEB
($ in millions)	2020		2019		2020		2019
Accumulated other comprehensive (gain) loss at
beginning of year	$	899	$	754	$	(45)	$	(41)
Net actuarial (gain) loss amortized during year		(99)		(58)		(6)		4
Net loss on disposal recognized during the year		(81)		-		(7)		-
Prior service credit amortized during year		-		-		32		11
Prior service credit occurring during year		-		-		-		(149)
Net actuarial loss occurring during year		355		260		100		130
Settlement loss recognized		(159)		(57)		-		-
Net amount recognized in comprehensive income
(loss) for the year		16		145		119		(4)
Accumulated other comprehensive (gain) loss at
end of year	$	915	$	899	$	74	$	(45)