Annual report [Section 13 and 15(d), not S-K Item 405]

Income Taxes - Income Tax Reconciliation (Details)

v3.25.4
Income Taxes - Income Tax Reconciliation (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Differences between provision for income taxes and income tax expense computed by applying federal amount      
U.S. Federal statutory tax rate $ (683) $ 206 $ 173
Tax credits (1) (2)  
Nontaxable and nondeductible items, net      
Nontaxable merger proceeds (237) (21)  
Other 8 1 1
Domestic state and local income taxes, net of federal effect $ (10) $ 3 $ 1
Effective Income Tax Rate Reconciliation, State and Local Jurisdiction, Contribution Greater than 50 Percent, Tax Effect [Extensible Enumeration] stpr:CO stpr:CO stpr:CO
Total income tax (benefit) expense $ (923) $ 187 $ 175
Tax Jurisdiction of Domicile [Extensible Enumeration] us-gaap:DomesticCountryMember us-gaap:DomesticCountryMember us-gaap:DomesticCountryMember
Differences between provision for income taxes and income tax expense computed by applying federal rates      
U.S. Federal statutory tax rate 21.00% 21.00% 21.00%
Tax credits 0.00% 0.00% 0.00%
Nontaxable and nondeductible items, net      
Nontaxable merger proceeds (7.00%) (2.00%) 0.00%
Other 0.00% 0.00% 0.00%
Domestic state and local income taxes, net of federal effect 0.00% 0.00% 0.00%
Total income tax (benefit) expense 28.00% 19.00% 21.00%