| Schedule of Financial Data for Segments |
The tables below show our financial data for our segments for the periods indicated (in millions). | | | | | | | | | | | | | | | | | | | | | | | | | | Year Ended December 31, 2013 | | West | | Texas | | North | | Southeast | | Consolidation and Elimination | | Total | Revenues from external customers | $ | 1,937 |
| | $ | 2,347 |
| | $ | 1,356 |
| | $ | 661 |
| | $ | — |
| | $ | 6,301 |
| Intersegment revenues | 5 |
| | (4 | ) | | 33 |
| | 189 |
| | (223 | ) | | — |
| Total operating revenues | $ | 1,942 |
| | $ | 2,343 |
| | $ | 1,389 |
| | $ | 850 |
| | $ | (223 | ) | | $ | 6,301 |
| Commodity Margin | $ | 1,020 |
| | $ | 632 |
| | $ | 712 |
| | $ | 204 |
| | $ | — |
| | $ | 2,568 |
| Add: Unrealized mark-to-market commodity activity, net and other(1) | (50 | ) | | 51 |
| | 5 |
| | 22 |
| | (31 | ) | | (3 | ) | Less: | | | | | | | | | | | | Plant operating expense | 365 |
| | 269 |
| | 172 |
| | 120 |
| | (31 | ) | | 895 |
| Depreciation and amortization expense | 243 |
| | 165 |
| | 130 |
| | 73 |
| | (2 | ) | | 609 |
| Sales, general and other administrative expense | 37 |
| | 56 |
| | 21 |
| | 21 |
| | 1 |
| | 136 |
| Other operating expenses | 45 |
| | 3 |
| | 29 |
| | 4 |
| | — |
| | 81 |
| (Income) from unconsolidated investments in power plants | — |
| | — |
| | (30 | ) | | — |
| | — |
| | (30 | ) | Income from operations | 280 |
| | 190 |
| | 395 |
| | 8 |
| | 1 |
| | 874 |
| Interest expense, net of interest income | | | | | | | | | | | 690 |
| Debt extinguishment costs and other (income) expense, net | | | | | | | | | | | 164 |
| Income before income taxes | | | | | | | | | | | $ | 20 |
|
| | | | | | | | | | | | | | | | | | | | | | | | | | Year Ended December 31, 2012 | | West | | Texas | | North | | Southeast | | Consolidation and Elimination | | Total | Revenues from external customers | $ | 1,668 |
| | $ | 1,857 |
| | $ | 1,280 |
| | $ | 673 |
| | $ | — |
| | $ | 5,478 |
| Intersegment revenues | 10 |
| | 61 |
| | 14 |
| | 80 |
| | (165 | ) | | — |
| Total operating revenues | $ | 1,678 |
| | $ | 1,918 |
| | $ | 1,294 |
| | $ | 753 |
| | $ | (165 | ) | | $ | 5,478 |
| Commodity Margin(2)(3) | $ | 994 |
| | $ | 570 |
| | $ | 729 |
| | $ | 245 |
| | $ | — |
| | $ | 2,538 |
| Add: Unrealized mark-to-market commodity activity, net and other(1) | (93 | ) | | 87 |
| | (14 | ) | | (33 | ) | | (31 | ) | | (84 | ) | Less: | | | | | | | | | | | | Plant operating expense | 368 |
| | 247 |
| | 206 |
| | 131 |
| | (30 | ) | | 922 |
| Depreciation and amortization expense | 203 |
| | 142 |
| | 134 |
| | 85 |
| | (2 | ) | | 562 |
| Sales, general and other administrative expense | 36 |
| | 47 |
| | 28 |
| | 29 |
| | — |
| | 140 |
| Other operating expenses | 42 |
| | 5 |
| | 29 |
| | 5 |
| | (3 | ) | | 78 |
| (Gain) on sale of assets, net | — |
| | — |
| | (7 | ) | | (215 | ) | | — |
| | (222 | ) | (Income) from unconsolidated investments in power plants | — |
| | — |
| | (28 | ) | | — |
| | — |
| | (28 | ) | Income from operations | 252 |
| | 216 |
| | 353 |
| | 177 |
| | 4 |
| | 1,002 |
| Interest expense, net of interest income | | | | | | | | | | | 725 |
| Loss on interest rate derivatives | | | | | | | | | | | 14 |
| Debt extinguishment costs and other (income) expense, net | | | | | | | | | | | 45 |
| Income before income taxes | | | | | | | | | | | $ | 218 |
|
| | | | | | | | | | | | | | | | | | | | | | | | | | Year Ended December 31, 2011 | | West | | Texas | | North | | Southeast | | Consolidation and Elimination | | Total | Revenues from external customers | $ | 2,372 |
| | $ | 2,306 |
| | $ | 1,336 |
| | $ | 786 |
| | $ | — |
| | $ | 6,800 |
| Intersegment revenues | 12 |
| | 23 |
| | 7 |
| | 135 |
| | (177 | ) | | — |
| Total operating revenues | $ | 2,384 |
| | $ | 2,329 |
| | $ | 1,343 |
| | $ | 921 |
| | $ | (177 | ) | | $ | 6,800 |
| Commodity Margin(2)(3) | $ | 1,061 |
| | $ | 469 |
| | $ | 704 |
| | $ | 240 |
| | $ | — |
| | $ | 2,474 |
| Add: Unrealized mark-to-market commodity activity, net and other(1) | 113 |
| | (102 | ) | | (13 | ) | | 1 |
| | (32 | ) | | (33 | ) | Less: | | | | | | | | | | | | Plant operating expense | 380 |
| | 235 |
| | 177 |
| | 141 |
| | (29 | ) | | 904 |
| Depreciation and amortization expense | 192 |
| | 135 |
| | 138 |
| | 90 |
| | (5 | ) | | 550 |
| Sales, general and other administrative expense | 43 |
| | 43 |
| | 24 |
| | 22 |
| | (1 | ) | | 131 |
| Other operating expenses | 41 |
| | 3 |
| | 30 |
| | 5 |
| | (2 | ) | | 77 |
| (Income) from unconsolidated investments in power plants | — |
| | — |
| | (21 | ) | | — |
| | — |
| | (21 | ) | Income (loss) from operations | 518 |
| | (49 | ) | | 343 |
| | (17 | ) | | 5 |
| | 800 |
| Interest expense, net of interest income | | | | | | | | | | | 751 |
| Loss on interest rate derivatives | | | | | | | | | | | 145 |
| Debt extinguishment costs and other (income) expense, net | | | | | | | | | | | 115 |
| Loss before income taxes | | | | | | | | | | | $ | (211 | ) |
__________ | | (1) | Includes $6 million, $1 million and $12 million of lease levelization and $14 million, $14 million and $8 million of amortization expense for the years ended December 31, 2013, 2012 and 2011, respectively. |
| | (2) | Our North segment includes Commodity Margin of $73 million and $70 million for the years ended December 31, 2012 and 2011, respectively, related to Riverside Energy Center, LLC, which was sold in December 2012. |
| | (3) | Our Southeast segment includes Commodity Margin of $52 million and $51 million for the years ended December 31, 2012 and 2011, respectively, related to Broad River, which was sold in December 2012. |
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