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Related-Party Transactions (Tables)
 3 Months Ended
Mar. 31, 2020
Related Party Transactions [Abstract]  
Schedule of Related-Party Transactions The related-party transactions included in SCE's consolidated balance sheets for wildfire-related insurance purchased from EIS were as follows:

(in millions)
 
March 31,
2020
 
December 31, 2019
Long-term insurance receivable due from affiliate
 
$
803

 
$
803

Prepaid insurance1
 
32

 
10

1 
Reflected in "Prepaid expenses" on SCE's consolidated balance sheets.