v2.3.0.15

Segment Information (Tables) | 9 Months Ended
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Sep. 30, 2011
Segment Information [Abstract] |
Segment tables |
|  | Three Months Ended September 30, 2011 |
|  | West |  |  | Texas |  |  | North |  |  | Southeast |  |  | Consolidation and Elimination |  |  | Total |
Revenues from external customers |  | $ | 688 |  |  | $ | 843 |  |  | $ | 430 |  |  | $ | 248 |  |  | $ | — |  |  | $ | 2,209 |
Intersegment revenues |  |  | 3 |  |  |  | 3 |  |  |  | (8 | ) |  |  | 31 |  |  |  | (29 | ) |  |  | — |
Total operating revenues |  | $ | 691 |  |  | $ | 846 |  |  | $ | 422 |  |  | $ | 279 |  |  | $ | (29 | ) |  | $ | 2,209 |
Commodity Margin |  | $ | 329 |  |  | $ | 162 |  |  | $ | 259 |  |  | $ | 75 |  |  | $ | — |  |  | $ | 825 |
Add: Mark-to-market commodity activity, net and other(1) (2) |  |  | 20 |  |  |  | (21 | ) |  |  | (11 | ) |  |  | — |  |  |  | (8 | ) |  |  | (20 | )
Less: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Plant operating expense |  |  | 94 |  |  |  | 50 |  |  |  | 44 |  |  |  | 33 |  |  |  | (9 | ) |  |  | 212 |
Depreciation and amortization expense |  |  | 52 |  |  |  | 34 |  |  |  | 36 |  |  |  | 22 |  |  |  | (1 | ) |  |  | 143 |
Sales, general and other administrative expense |  |  | 10 |  |  |  | 10 |  |  |  | 7 |  |  |  | 7 |  |  |  | (1 | ) |  |  | 33 |
Other operating expenses(3) |  |  | 11 |  |  |  | (1 | ) |  |  | 7 |  |  |  | — |  |  |  | 2 |  |  |  | 19 |
Income from unconsolidated investments in power plants |  |  | — |  |  |  | — |  |  |  | (5 | ) |  |  | — |  |  |  | — |  |  |  | (5 | )
Income from operations |  |  | 182 |  |  |  | 48 |  |  |  | 159 |  |  |  | 13 |  |  |  | 1 |  |  |  | 403 |
Interest expense, net of interest income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 190 |
(Gain) loss on interest rate derivatives, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 |
Debt extinguishment costs and other (income) expense, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | — |
Income before income taxes and discontinued operations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ | 210 |
Segment tables |
|  | Three Months Ended September 30, 2010 |
|  | West |  |  | Texas |  |  | North |  |  | Southeast |  |  | Consolidation and Elimination |  |  | Total |
Revenues from external customers |  | $ | 716 |  |  | $ | 670 |  |  | $ | 468 |  |  | $ | 276 |  |  | $ | — |  |  | $ | 2,130 |
Intersegment revenues |  |  | 2 |  |  |  | 6 |  |  |  | 2 |  |  |  | 53 |  |  |  | (63 | ) |  |  | — |
Total operating revenues |  | $ | 718 |  |  | $ | 676 |  |  | $ | 470 |  |  | $ | 329 |  |  | $ | (63 | ) |  | $ | 2,130 |
Commodity Margin |  | $ | 338 |  |  | $ | 165 |  |  | $ | 259 |  |  | $ | 90 |  |  | $ | — |  |  | $ | 852 |
Add: Mark-to-market commodity activity, net and other(1) |  |  | 42 |  |  |  | 62 |  |  |  | 18 |  |  |  | 18 |  |  |  | (6 | ) |  |  | 134 |
Less: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Plant operating expense |  |  | 86 |  |  |  | 55 |  |  |  | 38 |  |  |  | 28 |  |  |  | (8 | ) |  |  | 199 |
Depreciation and amortization expense |  |  | 52 |  |  |  | 37 |  |  |  | 37 |  |  |  | 28 |  |  |  | (2 | ) |  |  | 152 |
Sales, general and other administrative expense |  |  | 10 |  |  |  | 13 |  |  |  | 12 |  |  |  | 5 |  |  |  | 1 |  |  |  | 41 |
Other operating expenses(3) |  |  | 14 |  |  |  | — |  |  |  | 6 |  |  |  | — |  |  |  | 2 |  |  |  | 22 |
Impairment losses |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 19 |  |  |  | — |  |  |  | 19 |
Income from unconsolidated investments in power plants |  |  | — |  |  |  | — |  |  |  | (1 | ) |  |  | — |  |  |  | — |  |  |  | (1 | )
Income from operations |  |  | 218 |  |  |  | 122 |  |  |  | 185 |  |  |  | 28 |  |  |  | 1 |  |  |  | 554 |
Interest expense, net of interest income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 228 |
(Gain) loss on interest rate derivatives, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 84 |
Debt extinguishment costs and other (income) expense, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 23 |
Income before income taxes and discontinued operations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ | 219 |
Segment tables |
|  | Nine Months Ended September 30, 2011 |
|  | West |  |  | Texas |  |  | North |  |  | Southeast |  |  | Consolidation and Elimination |  |  | Total |
Revenues from external customers |  | $ | 1,753 |  |  | $ | 1,939 |  |  | $ | 1,025 |  |  | $ | 624 |  |  | $ | — |  |  | $ | 5,341 |
Intersegment revenues |  |  | 7 |  |  |  | 13 |  |  |  | 5 |  |  |  | 116 |  |  |  | (141 | ) |  |  | — |
Total operating revenues |  | $ | 1,760 |  |  | $ | 1,952 |  |  | $ | 1,030 |  |  | $ | 740 |  |  | $ | (141 | ) |  | $ | 5,341 |
Commodity Margin |  | $ | 798 |  |  | $ | 357 |  |  | $ | 578 |  |  | $ | 188 |  |  | $ | — |  |  | $ | 1,921 |
Add: Mark-to-market commodity activity, net and other(1) (2) |  |  | 36 |  |  |  | (54 | ) |  |  | (12 | ) |  |  | (4 | ) |  |  | (23 | ) |  |  | (57 | )
Less: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Plant operating expense |  |  | 297 |  |  |  | 193 |  |  |  | 136 |  |  |  | 107 |  |  |  | (22 | ) |  |  | 711 |
Depreciation and amortization expense |  |  | 140 |  |  |  | 99 |  |  |  | 102 |  |  |  | 67 |  |  |  | (3 | ) |  |  | 405 |
Sales, general and other administrative expense |  |  | 29 |  |  |  | 33 |  |  |  | 19 |  |  |  | 18 |  |  |  | — |  |  |  | 99 |
Other operating expenses(3) |  |  | 30 |  |  |  | 2 |  |  |  | 23 |  |  |  | 3 |  |  |  | (1 | ) |  |  | 57 |
Income from unconsolidated investments in power plants |  |  | — |  |  |  | — |  |  |  | (12 | ) |  |  | — |  |  |  | — |  |  |  | (12 | )
Income (loss) from operations |  |  | 338 |  |  |  | (24 | ) |  |  | 298 |  |  |  | (11 | ) |  |  | 3 |  |  |  | 604 |
Interest expense, net of interest income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 568 |
(Gain) loss on interest rate derivatives, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 149 |
Debt extinguishment costs and other (income) expense, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 108 |
Loss before income taxes and discontinued operations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ | (221 | )
Segment tables |
|  | Nine Months Ended September 30, 2010 |
|  | West |  |  | Texas |  |  | North |  |  | Southeast |  |  | Consolidation and Elimination |  |  | Total |
Revenues from external customers |  | $ | 1,906 |  |  | $ | 1,749 |  |  | $ | 725 |  |  | $ | 694 |  |  | $ | — |  |  | $ | 5,074 |
Intersegment revenues |  |  | 7 |  |  |  | 16 |  |  |  | 4 |  |  |  | 97 |  |  |  | (124 | ) |  |  | — |
Total operating revenues |  | $ | 1,913 |  |  | $ | 1,765 |  |  | $ | 729 |  |  | $ | 791 |  |  | $ | (124 | ) |  | $ | 5,074 |
Commodity Margin |  | $ | 809 |  |  | $ | 400 |  |  | $ | 390 |  |  | $ | 216 |  |  | $ | — |  |  | $ | 1,815 |
Add: Mark-to-market commodity activity, net and other(1) |  |  | 60 |  |  |  | 148 |  |  |  | 18 |  |  |  | 31 |  |  |  | (20 | ) |  |  | 237 |
Less: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Plant operating expense |  |  | 264 |  |  |  | 217 |  |  |  | 83 |  |  |  | 87 |  |  |  | (21 | ) |  |  | 630 |
Depreciation and amortization expense |  |  | 155 |  |  |  | 113 |  |  |  | 76 |  |  |  | 84 |  |  |  | (5 | ) |  |  | 423 |
Sales, general and other administrative expense |  |  | 36 |  |  |  | 29 |  |  |  | 37 |  |  |  | 11 |  |  |  | — |  |  |  | 113 |
Other operating expenses(3) |  |  | 43 |  |  |  | 2 |  |  |  | 21 |  |  |  | 2 |  |  |  | 1 |  |  |  | 69 |
Impairment losses |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 19 |  |  |  | — |  |  |  | 19 |
Income from unconsolidated investments in power plants |  |  | — |  |  |  | — |  |  |  | (14 | ) |  |  | — |  |  |  | — |  |  |  | (14 | )
Income from operations |  |  | 371 |  |  |  | 187 |  |  |  | 205 |  |  |  | 44 |  |  |  | 5 |  |  |  | 812 |
Interest expense, net of interest income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 627 |
(Gain) loss on interest rate derivatives, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 87 |
Debt extinguishment costs and other (income) expense, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 36 |
Income before income taxes and discontinued operations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ | 62 |
_________
(1) | Mark-to-market commodity activity represents the unrealized portion of our mark-to-market activity, net, included in operating revenues and fuel and purchased energy expense on our Consolidated Condensed Statements of Operations.
(2) | Includes $11 million and $15 million&nbsp;of lease levelization and $4 million and $5 million of contract amortization&nbsp;for&nbsp;the three and nine months ended September 30, 2011, respectively, related to contracts that became effective in 2011.
(3) | Excludes $3 million and $1 million&nbsp;of RGGI compliance and other environmental costs for the three months ended September 30, 2011 and 2010, respectively, and $7 million and $6 million for the nine months ended September 30, 2011 and 2010, respectively, which are components of Commodity Margin.

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