Note 10 - Earnings Per Share - Reconciliation of the Numerators and Denominators of the Earnings Per Share Calculations (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net income (loss) available to common stockholders - Numerator basic and diluted	$ 197	$ (31)	$ 226
Weighted-average common shares outstanding - Basic (in shares)	144.8	144.5	144.0
Employee compensation-related shares, including stock options (in shares)	1.4	0.0	1.1
Weighted-average common shares outstanding - Diluted (in shares)	146.2	144.5	145.1