Note 18 - Changes in Other Comprehensive Income (Loss), by Component (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Other Comprehensive Income Loss Net Of Tax Period Increase Decrease [Abstract]
Currency translation adjustments		$ (1)	$ (12)
Newly established net actuarial (loss) gain		(1)	1
Newly established net actuarial (loss) gain, net of tax		(1)	1
Amortization of prior service credit	[1]	(2)	(2)
Amortization of actuarial losses	[1]	9	5
Total reclassification adjustments		7	3
Tax provision			(1)
Reclassification adjustments, net of tax		7	2
Pension and other postretirement benefit plan changes, net of tax		6	3
Other comprehensive income (loss), net of tax		$ 5	$ (9)

[1] Reclassified to Total Net Periodic Benefit Cost - refer to Note 14, "Retirement Plans and Other Postretirement Benefits".