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Note 5 - Retirement Plans - Components of Net Periodic Pension and OPEB Cost (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Net periodic pension (benefit)/cost	$ (1)	$ (2)	$ (3)	$ (3)
Pension Plan [Member]
Service cost	14	12	27	25
Interest cost	46	46	92	92
Expected return on plan assets	(63)	(62)	(126)	(124)
Amortization of actuarial loss	$ 2	$ 2	$ 4	$ 4

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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