Note 10 - Income Taxes - Reconciliation of Income Tax Expense (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2025		Dec. 31, 2024	Dec. 31, 2023
Statutory federal rate applied to income before income tax expense		$ (24)		$ 103	$ (17)
Statutory federal rate applied to income before income tax expense, percent		21.00%
Nondeductible expenses		$ 3		6	11
Nondeductible expenses, percent		(3.00%)
Nondeductible compensation		$ 8
State and local taxes, net of federal tax benefit		$ (11)	[1]	21	(4)
Nondeductible compensation, percent		(7.00%)
Investments		$ (2)
Change in valuation allowance				(1)	(1)
Investments, percent		2.00%
Reserve for uncertain tax positions				(14)	1
State and local taxes, net of federal tax benefit, percent	[1]	10.00%
Other items, net		$ (2)		2	4
Other items, net, percent		2.00%
Total income tax (benefit) expense		$ (28)		$ 117	$ (6)
Income tax benefit as recorded, percent		25.00%		24.00%	7.00%
Income tax benefit as recorded, percent		25.00%		24.00%	7.00%

[1] The majority (greater than 50%) of the tax effect in this category is attributable to Louisiana.