Rendering

Component: (Network and Table)
Network
2313301 - Disclosure - Asset Retirement Obligations (Tables)
(http://www.nrgenergy.com/role/AssetRetirementObligationsTables)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0001126294 (http://www.sec.gov/CIK)
Asset Retirement Obligation Disclosure [Abstract]Period [Axis]
2016-01-01 - 2016-12-31
Asset Retirement Obligation Disclosure [Abstract]
 
Schedule of Change in Asset Retirement Obligation [Table Text Block]
The following table represents the balance of ARO obligations as of December 31, 2015, along with the additions, reductions and accretion related to the Registrants’ ARO obligations for the year ended December 31, 2016:
 
GenOn
 
GenOn Americas Generation
 
GenOn Mid-Atlantic
 
(In millions)
Balance as of December 31, 2015
$
187

 
$
82

 
$
27

Additions
16

 
16

 
—

Revisions in estimates for current obligations
(13
)
 
(10
)
 
10

Spending for current obligations and other settlements
(6
)
 
(1
)
 
—

Accretion — expense
21

 
13

 
2

Balance as of December 31, 2016
$
205

 
$
100

 
$
39