Note 16 - Changes in Other Comprehensive Income (Loss), by Component (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Other Comprehensive Income Loss Net Of Tax Period Increase Decrease [Abstract]
Currency translation adjustments		$ (10)	$ 4	$ (5)	$ 3
Newly established net gain (loss)		109		109	(1)
Newly established net gain (loss), net of tax		109		109	(1)
Amortization of prior service credit	[1]	(1)	(2)	(3)	(4)
Amortization of actuarial losses	[1]	2	10	4	19
Total reclassification adjustments		1	8	1	15
Reclassification adjustments, net of tax		1	8	1	15
Pension and other postretirement benefit plan changes, net of tax		110	8	110	14
Other comprehensive income, net of tax		$ 100	$ 12	$ 105	$ 17

[1] Reclassified to Total Net Periodic Benefit Cost - refer to Note 13, "Retirement Plans and Other Postretirement Benefits".