Note 9 - Employee Retirement Plans (Tables)

6 Months Ended

Jun. 30, 2024

Notes Tables

Schedule of Net Benefit Costs [Table Text Block]

	Pension benefits												Postretirement benefits
	Three months ended						Six months ended						Three months ended						Six months ended
	June 30,						June 30,						June 30,						June 30,
	2024			2023			2024			2023			2024			2023			2024			2023
Service cost	$	25		$	27		$	48		$	50		$	1		$	2		$	2		$	3
Interest cost		46			43			92			88			5			5			10			11
Expected return on plan assets		(48	)		(46	)		(96	)		(92	)
Amortization of actuarial net gain														(7	)		(6	)		(12	)		(11	)
Amortization of prior service cost (credit)		2			1			3			3			(2	)		(1	)		(4	)		(2	)
Special termination benefit charge		3			5			3			5
Total pension and postretirement benefit expense (income)	$	28		$	30		$	50		$	54		$	(3	)	$	—		$	(4	)	$	1