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NEP (Tables)
3 Months Ended
Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Summarized Financial Information
Summarized financial information of NEP is as follows:

 Three Months Ended March 31,
20212020
 (millions)
Operating revenues$246 $212 
Operating income$78 $49 
Net income (loss)$571 $(720)
Net income (loss) attributable to NEP$202 $(222)