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Note 5 - Retirement Plans (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

Schedule of Net Funded Status [Table Text Block]

Funded Status
Millions		2021				2020
Projected Benefit Obligation
Projected benefit obligation at beginning of year		$	5,658			$	4,847
Service cost			110				91
Interest cost			104				137
Actuarial (gain)/loss			(346	)			812
Gross benefits paid			(230	)			(229	)
Projected benefit obligation at end of year		$	5,296			$	5,658
Plan Assets
Fair value of plan assets at beginning of year		$	5,016			$	4,528
Actual (loss)/return on plan assets			737				686
Non-qualified plan benefit contributions			31				31
Gross benefits paid			(230	)			(229	)
Fair value of plan assets at end of year		$	5,554			$	5,016
Funded status at end of year		$	258			$	(642	)

Schedule of Amounts Recognized in Balance Sheet [Table Text Block]

Millions		2021				2020
Noncurrent assets		$	807			$	8
Current liabilities			(31	)			(30	)
Noncurrent liabilities			(518	)			(620	)
Net amounts recognized at end of year		$	258			$	(642	)

Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]

Millions		2021				2020				2019
Net actuarial (loss)/gain		$	813			$	(408	)		$	(88	)
Amortization of:
Actuarial loss			141				104				67
Total		$	954			$	(304	)		$	(21	)

Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Table Text Block]

Underfunded Accumulated Benefit Obligation
Millions		2021				2020
Projected benefit obligation		$	549			$	605
Accumulated benefit obligation		$	513			$	560
Fair value of plan assets			-				-
Underfunded accumulated benefit obligation		$	(513	)		$	(560	)

Defined Benefit Plan, Assumptions [Table Text Block]

Percentages		2021				2020
Discount rate			2.80	%			2.42	%
Compensation increase			4.30	%			4.40	%

Percentages		2021				2020				2019
Discount rate for benefit obligations			2.42	%			3.26	%			4.23	%
Discount rate for interest on benefit obligations			1.90	%			2.89	%			3.94	%
Discount rate for service cost			2.61	%			3.42	%			4.33	%
Discount rate for interest on service cost			2.53	%			3.36	%			4.30	%
Expected return on plan assets			6.25	%			7.00	%			7.00	%
Compensation increase			4.40	%			4.10	%			4.10	%

Schedule of Net Benefit Costs [Table Text Block]

Millions		2021				2020				2019
Net Periodic Pension Cost:
Service cost		$	110			$	91			$	80
Interest cost			104				137				160
Expected return on plan assets			(270	)			(282	)			(273	)
Amortization of:
Actuarial loss			141				104				67
Net periodic pension cost		$	85			$	50			$	34

Cash Contributions for Qualified Pension Plan, Benefit Payments for Non Qualified OPEB Plans [Table Text Block]

Millions		Qualified				Non-qualified
2021		$	-			$	31
2020			-				31

Schedule of Expected Benefit Payments [Table Text Block]

Millions
2022		$	229
2023			228
2024			227
2025			227
2026			228
Years 2027 - 2031			1,170

Schedule of Allocation of Plan Assets [Table Text Block]

			Percentage of Plan Assets
	Target					December 31,
	Allocation 2022					2021				2020
Equity securities			45% to 55%				57	%			63	%
Debt securities			45% to 55%				42				34
Real estate			0% to 2%				1				3
Total							100	%			100	%

Defined Benefit Plan, Plan Assets, Category [Table Text Block]

		Quoted Prices				Significant
		in Active				Other				Significant
		Markets for				Observable				Unobservable
		Identical Inputs				Inputs				Inputs
Millions		(Level 1)				(Level 2)				(Level 3)				Total
Plan assets at fair value:
Temporary cash investments		$	9			$	-			$	-			$	9
Registered investment companies [a]			10				-				-				10
Federal government securities			-				742				-				742
Bonds and debentures			-				1,116				-				1,116
Corporate stock			1,980				10				-				1,990
Total plan assets at fair value		$	1,999			$	1,868			$	-			$	3,867
Plan assets at NAV:
Registered investment companies [b]															185
Venture capital and buyout partnerships															710
Real estate funds															48
Collective trust and other funds															756
Total plan assets at NAV														$	1,699
Other assets/(liabilities) [c]															(12	)
Total plan assets														$	5,554

		Quoted Prices				Significant
		in Active				Other				Significant
		Markets for				Observable				Unobservable
		Identical Inputs				Inputs				Inputs
Millions		(Level 1)				(Level 2)				(Level 3)				Total
Plan assets at fair value:
Temporary cash investments		$	9			$	-			$	-			$	9
Registered investment companies [a]			252				-				-				252
Federal government securities			-				150				-				150
Bonds and debentures			-				831				-				831
Corporate stock			2,209				8				-				2,217
Total plan assets at fair value		$	2,470			$	989			$	-			$	3,459
Plan assets at NAV:
Registered investment companies [b]															312
Venture capital and buyout partnerships															585
Real estate funds															161
Collective trust and other funds															498
Total plan assets at NAV														$	1,556
Other assets/(liabilities) [c]															1
Total plan assets														$	5,016

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