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Related Party Transactions (Tables)
3 Months Ended
Mar. 31, 2020
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)20202019
Revenues from Related Parties Included in Operating Revenues  
Gladstone$ $ 
Ivanpah(a)
13  10  
Midway-Sunset  
Total
$15  $12