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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4E
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4E

Name:	us-gaap_DerivativeInstrumentsGainLossLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

DERIVATIVE ASSET (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
DERIVATIVE ASSET (Details) - USD ($) $ in Millions	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
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	$ 1.4	$ 2.7	$ 3.7	$ 8.5
Luminant Power Agreement \| Luminant ET Services Company LLC
Derivative Instruments, Gain (Loss) [Line Items]
Term of power agreement			5 years