v3.25.4
Income Taxes - Reconciliation of income tax (benefit) expense (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Income tax (benefit) reconciliation, amount    
U.S. Federal statutory tax rate $ (81) $ 20
Tax credits (2) (2)
Non-taxable and nondeductible items, net    
Executive Compensation 3 1
Non-deductible goodwill impairment 23  
Other 1 1
Domestic state and local income taxes, net of federal effect (21) 7
Income tax expense (benefit) $ (77) $ 27
Income tax (benefit) reconciliation, Percentage    
U.S. Federal statutory tax rate 21.00% 21.00%
Tax credits 1.00% (2.00%)
Non-taxable and nondeductible items, net    
Executive Compensation 1.00% 1.00%
Non-deductible goodwill impairment 6.00%  
Other 1.00%
Domestic state and local income taxes, net of federal effect 5.00% 7.00%
Total income tax expense (benefit) (in Percentage) 20.00% 28.00%
Effective Income Tax Rate Reconciliation, State and Local Jurisdiction, Contribution Greater than 50 Percent, Tax Effect [Extensible Enumeration] ALASKA ALASKA