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Comprehensive (Loss)/Income
9 Months Ended
Sep. 30, 2011
Comprehensive Loss Income Disclosure [Abstract] 
Comprehensive (Loss)/Income
Note 3 — Comprehensive (Loss)/Income
The following table summarizes the components of the Company's comprehensive (loss)/income, net of tax:
 
Three months ended September 30,
 
Nine months ended September 30,
(In millions)
2011
 
2010
 
2011
 
2010
Net (loss)/income
$
(55
)
 
$
223

 
$
306

 
$
491

Changes in derivative instruments
(76
)
 
59

 
(225
)
 
162

Foreign currency translation adjustment
(27
)
 
36

 
(5
)
 
(6
)
Unrealized loss on available-for-sale securities
(1
)
 
—

 
(1
)
 
(1
)
Other comprehensive (loss)/income
(104
)
 
95

 
(231
)
 
155

Less: Comprehensive loss attributable to noncontrolling interest
$
—

 
$
—

 
$
—

 
$
(1
)
Comprehensive (loss)/income attributable to NRG Energy, Inc.
$
(159
)
 
$
318

 
$
75

 
$
647


The following table summarizes the changes in the Company’s accumulated other comprehensive income, or OCI, net of tax:
(In millions)
 
Accumulated other comprehensive income as of December 31, 2010
$
432

Changes in derivative instruments
(225
)
Foreign currency translation adjustment
(5
)
Unrealized loss on available-for-sale securities
$
(1
)
Accumulated other comprehensive income as of September 30, 2011
$
201