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Related-Party Transactions (Tables)
 12 Months Ended
Dec. 31, 2019
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:
 
 
December 31,
(in millions)
 
2019
 
2018
Long-term insurance receivables due from affiliate
 
$
803

 
$
1,000

Prepaid insurance1
 
10

 
13

Current payables due to affiliate2
 
—

 
4

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