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Note 5 - Retirement Plans - Components of Net Periodic Pension and OPEB Cost (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Net periodic pension cost	$ 6	$ 25
Pension Plan [Member]
Service cost	26	30
Interest cost	31	26
Expected return on plan assets	(73)	(67)
Amortization of actuarial loss	$ 22	$ 36

X

- Definition

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

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