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Transactions With Affiliated Companies (Tables)
 12 Months Ended
Dec. 31, 2017
Transactions With Affiliated Companies [Abstract]  
Affiliated Company Transactions
The primary affiliated company transactions for FES during the three years ended December 31, 2017 are as follows:
FES
 
2017
 
2016
 
2015
 
 
 
(In millions)
Revenues:
 
 
 
 
 
 
 
Electric sales to affiliates
 
$
366

 
$
459

 
$
666

 
Other
 
11

 
11

 
14

 
Expenses:
 


 


 


 
Purchased power from affiliates
 
201

 
622

 
353

 
Fuel
 
4

 
4

 
1

 
Support services
 
775

 
748

 
705

 
Investment Income:
 


 


 


 
Interest income from FE
 
13

 
2

 
2

 
Interest Expense:
 


 


 


 
Interest expense to affiliates
 
—

 
5

 
4

 
Interest expense to FE
 
19

 
2

 
3