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INCOME TAXES (Tables)
3 Months Ended
Mar. 31, 2024
Income Tax Disclosure [Abstract]  
Schedule of Effective Income Tax Rate Reconciliation The following tables reconcile the effective tax rate to the federal income tax statutory rate for the three months ended March 31, 2024 and 2023:
For the Three Months Ended March 31,
20242023
(In millions)
Income before income taxes$402 $400 
Federal income tax expense at statutory rate (21%)$84 $84 
Increases (reductions) in tax expense resulting from:
State and municipal income taxes, net of federal tax benefit23 14 
AFUDC equity and other flow-through(7)(5)
Deferred taxes related to sale of equity interest in FET, net— 
Excess deferred tax amortization due to the Tax Act(13)(16)
Valuation allowances 39 
Other, net
Total income taxes$135 $90 
Effective income tax rate33.6 %22.5 %