Note 7 - Income Taxes - Income Before Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
U.S. companies	$ 1,157	$ 1,282	$ (62)
Non-U.S. companies	640	1,144	696
Income before income taxes	$ 1,797	$ 2,426	$ 634