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Related Party Transactions (Notes)
12 Months Ended
Dec. 31, 2015
Related Party Transactions [Abstract]  
Related Party Transactions
Related Party Transactions
The following table summarizes NRG's material related party transactions with affiliates that are included in the Company's operating revenues, operating costs and other income and expense:
 
Year Ended December 31,
 
2015
 
2014
 
2013
 
(In millions)
Revenues from Related Parties Included in Operating Revenues
 
 
 
 
 
Gladstone
$
4

 
$
6

 
$
6

GenConn
4

 
6

 
5

Total
$
8

 
$
12

 
$
11



Gladstone — NRG provides services to Gladstone, an equity method investment, under an operations and maintenance agreement. Fees for services under this contract primarily include recovery of NRG's costs of operating the plant as approved in the annual budget, as well as a base monthly fee.
GenConn — NRG has O&M agreements with GenConn Devon and GenConn Middletown that began in June 2011. See further discussion in Note 16, Investments Accounted for by the Equity Method and Variable Interest Entities.
Conemaugh and Keystone facilities — The Company operates the Conemaugh and Keystone facilities under five-year agreements that initially expired in December 2015 and were renewed through December 2020 that, subject to certain provisions and notifications, could be terminated annually with one year's notice. The Company is reimbursed by the other owners for the cost of direct services provided to the Conemaugh and Keystone facilities. Additionally, the Company received fees of $11 million during 2015, $10 million in 2014, and $10 million in 2013.