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Related Party Transactions (Tables)
3 Months Ended
Mar. 31, 2021
Related Party Transactions [Abstract]  
Summary of NRG's Material Related Party Transactions
The following table summarizes NRG's material related party transactions with third party affiliates:
 Three months ended March 31,
(In millions)20212020
Revenues from Related Parties Included in Operating Revenues  
Gladstone$$
Ivanpah(a)
12 13 
Midway-Sunset
Total
$15 $15 
(a) Also includes fees under project management agreements with each project company