Note 15 - Other Comprehensive Income (Loss) - Changes in Other Comprehensive Income (Loss), by Component (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Currency translation adjustments		$ 12	$ (3)	$ 0	$ (15)
Newly established net loss		0	(1)	0	(89)
Newly established prior service cost		0	0	0	(29)
Tax provision		0	0	0	0
Newly established net loss and prior service cost, net of tax		0	(1)	0	(118)
Amortization of prior service cost (1)	[1]	2	3	8	6
Amortization of actuarial gains (1)	[1]	(9)	(8)	(28)	(23)
Total reclassification adjustments		(7)	(5)	(20)	(17)
Tax provision		0	0	0	0
Reclassification adjustments, net of tax		(7)	(5)	(20)	(17)
Pension and other postretirement benefit plan changes, net of tax		(7)	(6)	(20)	(135)
Other comprehensive income (loss), net of tax		$ 5	$ (9)	$ (20)	$ (150)

[1] Reclassified to Total Net Periodic Benefit Cost - refer to Note 12, "Retirement Plans and Other Postretirement Benefits".