Note 7 - Earnings Per Share - Reconciliation of the Numerators and Denominators of the Earnings Per Share Calculations (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Net income available to common stockholders - Numerator basic and diluted	$ 28	$ 17
Basic (in shares)	143.9	144.2
Employee compensation-related shares, including stock options (in shares)	0.4	1.1
Weighted-average common shares outstanding - Diluted (in shares)	144.3	145.3