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Jointly Owned Plants (Tables)
12 Months Ended
Dec. 31, 2021
Jointly Owned Plants Disclosure [Abstract]  
Summary of NRG's proportionate ownership interest in the company's jointly-owned facilities The following table summarizes NRG's proportionate ownership interest in the Company's jointly-owned facilities:
(In millions unless otherwise stated)
As of December 31, 2021
Ownership
Interest
Property, Plant &
Equipment
Accumulated
Depreciation
Construction in
Progress
South Texas Project Units 1 and 2, Bay City, TX44.00 %$421 $(208)$
Cedar Bayou Unit 4, Baytown, TX50.00 %220 (109)12