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Segment Reporting (Tables)
9 Months Ended
Sep. 30, 2011
Segment Reporting Disclosure [Abstract] 
Segment reporting information
(In millions)
 
 
Wholesale Power Generation
 
 
 
 
 
 
 
 
Three months ended September 30, 2011
Reliant
Energy
 
Texas(a)(b)
 
Northeast
 
South
Central
 
West
 
Internat-
ional
 
Thermal
 
Corporate(c)(d)
 
Elimination
 
Total
Operating revenues
$
1,637

 
$
822

 
$
299

 
$
279

 
$
49

 
$
35

 
$
37

 
$
227

 
$
(711
)
 
$
2,674

Depreciation and amortization
24

 
124

 
33

 
23

 
3

 
—

 
4

 
27

 
—

 
238

Equity in earnings/(losses) of unconsolidated affiliates
—

 
5

 
4

 
—

 
5

 
3

 
—

 
(1
)
 
—

 
16

Income/(loss) before income taxes
65

 
(56
)
 
10

 
23

 
24

 
8

 
3

 
(212
)
 
—

 
(135
)
Net income/(loss) attributable to NRG Energy, Inc.
$
65

 
$
(56
)
 
$
10

 
$
23

 
$
24

 
$
6

 
$
3

 
$
(130
)
 
$
—

 
$
(55
)
Total assets
$
1,623

 
$
12,834

 
$
1,919

 
$
1,279

 
$
2,389

 
$
676

 
$
347

 
$
17,774

 
$
(14,081
)
 
$
24,760

(a)
Includes inter-segment sales of $597 million to Reliant Energy and $110 million to Green Mountain Energy.
(b)
Includes impairment charge on emission allowances of $160 million.
(c)
Includes Green Mountain Energy results, and Energy Plus assets as of the September 30, 2011, date of acquisition.
(d)
Includes impairment charges on investment of $3 million and loss on debt extinguishment of $32 million.


(In millions)
 
 
Wholesale Power Generation
 
 
 
 
 
 
 
 
Three months ended September 30, 2010
Reliant
Energy
 
Texas(e)
 
Northeast
 
South
Central
 
West
 
Internat-
ional
 
Thermal
 
Corporate
 
Elimination
 
Total
Operating revenues
$
1,562

 
$
1,040

 
$
353

 
$
166

 
$
43

 
$
30

 
$
40

 
$
(1
)
 
$
(548
)
 
$
2,685

Depreciation and amortization
32

 
124

 
29

 
17

 
2

 
—

 
3

 
3

 
—

 
210

Equity in earnings of unconsolidated affiliates
—

 
8

 
—

 
—

 
4

 
4

 
—

 
—

 
—

 
16

(Loss)/income before income taxes
(20
)
 
439

 
23

 
8

 
20

 
10

 
3

 
(171
)
 
—

 
312

Net (loss)/income attributable to
NRG Energy, Inc.
$
(20
)
 
$
439

 
$
23

 
$
8

 
$
20

 
$
7

 
$
3

 
$
(257
)
 
$
—

 
$
223

(e) Includes inter-segment sales of $547 million to Reliant Energy.














(In millions)
 
 
Wholesale Power Generation
 
 
 
 
 
 
 
 
Nine months ended September 30, 2011
Reliant
Energy
 
Texas(a)(b)
 
Northeast
 
South
Central
 
West
 
Internat-
ional
 
Thermal
 
Corporate(c)(d)
 
Elimination
 
Total
Operating revenues
$
3,906

 
$
2,175

 
$
771

 
$
656

 
$
129

 
$
108

 
$
109

 
$
510

 
$
(1,417
)
 
$
6,947

Depreciation and amortization
72

 
368

 
89

 
65

 
9

 
—

 
11

 
51

 
—

 
665

Equity in (losses)/earnings of unconsolidated affiliates
—

 
(1
)
 
9

 
—

 
10

 
9

 
—

 
(1
)
 
—

 
26

Income/(loss) before income taxes
368

 
154

 
(3
)
 
49

 
49

 
26

 
6

 
(1,158
)
 
—

 
(509
)
Net income/(loss) attributable to NRG Energy, Inc.
$
368

 
$
154

 
$
(3
)
 
$
49

 
$
49

 
$
20

 
$
6

 
$
(337
)
 
$
—

 
$
306

(a)
Includes inter-segment sales of $1,230 million to Reliant Energy and $176 million to Green Mountain Energy.
(b)
Includes impairment charge on emission allowances of $160 million.
(c)
Includes Green Mountain Energy results.
(d)
Includes impairment charges on investment of $495 million, loss on debt extinguishment of $175 million, and tax benefit of $633 million resulting from the resolution of the federal tax audit.

(In millions)
 
 
Wholesale Power Generation
 
 
 
 
 
 
 
 
Nine months ended September 30, 2010
Reliant
Energy
 
Texas (e)
 
Northeast
 
South
Central
 
West
 
Internat-ional
 
Thermal
 
Corporate
 
Elimination
 
Total
Operating revenues
$
4,020

 
$
2,602

 
$
837

 
$
461

 
$
110

 
$
95

 
$
103

 
$
(3
)
 
$
(1,192
)
 
$
7,033

Depreciation and amortization
91

 
365

 
92

 
49

 
8

 
—

 
8

 
7

 
—

 
620

Equity in earnings/(losses) of unconsolidated affiliates
—

 
19

 
(1
)
 
—

 
5

 
19

 
—

 
(1
)
 
—

 
41

Income/(loss) before income taxes
69

 
971

 
73

 
8

 
34

 
51

 
5

 
(449
)
 
—

 
762

Net loss attributable to non-controlling interest
—

 
(1
)
 
—

 
—

 
—

 
—

 
—

 
—

 
—

 
(1
)
Net income/(loss)attributable to NRG Energy, Inc.
$
69

 
$
972

 
$
73

 
$
8

 
$
34

 
$
36

 
$
5

 
$
(705
)
 
$
—

 
$
492

(e) Includes inter-segment sales of $1,187 million to Reliant Energy.