Note 15 - Other Comprehensive Loss - Changes in Other Comprehensive Income (Loss), by Component (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Currency translation adjustments		$ (6)	$ (11)	$ (12)	$ (12)
Newly established net loss		0	(117)	0	(117)
Tax provision		0	0	0	0
Newly established net (loss) gain and prior service cost, net of tax		0	(117)	0	(117)
Amortization of prior service cost (1)	[1]	3	2	6	3
Amortization of actuarial gains (1)	[1]	(10)	(8)	(19)	(15)
Total reclassification adjustments		(7)	(6)	(13)	(12)
Tax provision		0	0	0	0
Reclassification adjustments, net of tax		(7)	(6)	(13)	(12)
Pension and other postretirement benefit plan changes, net of tax		(7)	(123)	(13)	(129)
Other comprehensive loss, net of tax		$ (13)	$ (134)	$ (25)	$ (141)

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