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Note 5 - Retirement Plans - Components of Net Periodic Pension and OPEB Cost (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Net periodic pension (benefit)/cost	$ (1)	$ 18	$ 10	$ 67
Pension Plan [Member]
Service cost	21	25	73	85
Interest cost	31	25	93	78
Expected return on plan assets	(74)	(67)	(220)	(202)
Amortization of actuarial loss	$ 21	$ 35	$ 64	$ 106

X

- Definition

Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

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Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan.

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