Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

DERIVATIVE ASSETS (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
DERIVATIVE ASSETS (Details) - USD ($) $ in Millions	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Luminant Power Agreement
Derivative Instruments, Gain (Loss) [Line Items]
Termination notice period			6 months
Luminant Power Agreement
Derivative Instruments, Gain (Loss) [Line Items]
Power sales	$ 4.3	$ 2.3	$ 8.7	$ 4.7
Luminant Power Agreement \| Luminant ET Services Company LLC
Derivative Instruments, Gain (Loss) [Line Items]
Term of power agreement			5 years