Note 8 - 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		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Net income available to common stockholders - Numerator basic and diluted	$ 16	$ 30	$ 19	$ 58
Basic (in shares)	145.0	144.3	144.9	144.1
Employee compensation-related shares (in shares)	0.1	0.1	0.0	0.2
Weighted-average common shares outstanding - Diluted (in shares)	145.1	144.4	144.9	144.3