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Income Taxes (Notes)
 3 Months Ended
Mar. 31, 2026
Income Tax Disclosure [Abstract]  
Income Taxes
8.  Income Taxes

Income tax expense included on our accompanying consolidated statements of income is as follows:
Three Months Ended
March 31,
20262025
(In millions, except percentages)
Income tax expense$287 $186 
Effective tax rate22.3 %20.0 %

The effective tax rate for the three months ended March 31, 2026 is higher than the statutory federal rate of 21% primarily due to state income taxes, partially offset by dividend-received deductions from our investments in Florida Gas Pipeline (Citrus), NGPL Holdings LLC, and Products (SE) Pipe Line Company (PPL).
The effective tax rate for the three months ended March 31, 2025 is lower than the statutory federal rate of 21% primarily due to (i) the recognition of investment tax credits generated by a biogas project and (ii) dividend-received deductions from our investments in Citrus, NGPL Holdings LLC, and PPL, partially offset by state income taxes.