XML 52 R42.htm IDEA: XBRL DOCUMENT v3.23.1
Derivative Asset - Additional Information (Details) - Luminant Power Agreement - USD ($)
$ in Millions
3 Months Ended
Aug. 26, 2022
Feb. 28, 2022
Mar. 31, 2023
Derivative Instruments, Gain (Loss) [Line Items]      
Effective agreement date for scheduled amount of energy     Jul. 01, 2022
Sale of electricity back to ERCOT     $ 0.1
Luminant ET Services Company LLC      
Derivative Instruments, Gain (Loss) [Line Items]      
Definitive power purchase agreement date     Jun. 23, 2021
Definitive power purchase agreement amendment date     Jul. 09, 2021
Definitive power purchase agreement further amendment date Aug. 26, 2022 Feb. 28, 2022  
Term of power agreement     5 years