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Related-Party Transactions (Tables)
3 Months Ended
Mar. 31, 2022
Related Party Transactions [Abstract]  
Schedule of Related-Party Transactions

March 31, 

December 31, 

(in millions)

    

2022

    

2021

Prepaid insurance1

$

26

$

52

Long-term insurance receivable due from affiliate

76

1

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