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Income Taxes (Tables)
3 Months Ended
Mar. 31, 2025
Income Tax Disclosure [Abstract]  
Effective Income Tax Rate Reconciliation
The effective income tax rate varies from the U.S. federal statutory rate principally due to the following:
Three Months Ended March 31,
2025
2024
U.S. federal statutory income tax
21.0 %$32 21.0 %$220 
(Decrease) increase due to:
State income taxes, net of federal income tax benefit(a)
(0.7)(1)(6.2)(64)
Foreign Tax Effects0.7 0.1 
Tax Credits
PTC
(1.3)(2)(6.1)(64)
Amortization of ITC, including deferred taxes on basis differences(2.0)(3)(0.3)(3)
Other(2.0)(3)(0.6)(6)
Nontaxable or Nondeductible Items
Share-based payment awards(25.2)(38)(1.5)(16)
Excess officers compensation4.6 0.4 
Other0.9 — — 
Other Adjustments
Qualified NDT fund income and losses
18.6 28 8.9 93 
Effective income tax
14.6 %$22 15.7 %$165 
__________
(a)State taxes in California, Illinois, Maryland, Massachusetts, and New Jersey made up the majority (greater than 50%) of the tax effect in this category.