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Related-Party Transactions
 6 Months Ended
Jun. 30, 2019
Related Party Transactions [Abstract]  
Related-Party Transactions Related-Party Transactions
SCE purchased wildfire liability insurance with premiums of $74 million and $260 million from Edison Insurance Services, Inc. ("EIS"), a wholly-owned subsidiary of Edison International, for the three month and six months ended June 30, 2019, respectively. The related-party transactions included in SCE's consolidated balance sheets for wildfire-related insurance purchased from EIS were as follows:

(in millions)
 
June 30,
2019
 
December 31, 2018
Long-term insurance receivable due from affiliate
 
$
1,000

 
$
1,000

Prepaid insurance1
 
74

 
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.
The amortization expense for wildfire-related insurance was $41 million and $35 million for the three months ended June 30, 2019 and 2018 respectively, and $72 million and $71 million for the six months ended June 30, 2019 and 2018, respectively.