| Schedule of Financial Data for Segments |
The tables below show our financial data for our segments for the periods indicated (in millions). | | | | | | | | | | | | | | | | | | | | | | Three Months Ended June 30, 2015 | | West | | Texas | | East | | Consolidation
and
Elimination | | Total | Revenues from external customers | $ | 421 |
| | $ | 570 |
| | $ | 451 |
| | $ | — |
| | $ | 1,442 |
| Intersegment revenues | — |
| | 5 |
| | 2 |
| | (7 | ) | | — |
| Total operating revenues | $ | 421 |
| | $ | 575 |
| | $ | 453 |
| | $ | (7 | ) | | $ | 1,442 |
| Commodity Margin | $ | 240 |
| | $ | 170 |
| | $ | 247 |
| | $ | — |
| | $ | 657 |
| Add: Mark-to-market commodity activity, net and other(1) | (14 | ) | | 10 |
| | 30 |
| | (7 | ) | | 19 |
| Less: | | | | | | | | | | Plant operating expense | 120 |
| | 82 |
| | 77 |
| | (7 | ) | | 272 |
| Depreciation and amortization expense | 65 |
| | 50 |
| | 45 |
| | — |
| | 160 |
| Sales, general and other administrative expense | 6 |
| | 15 |
| | 9 |
| | — |
| | 30 |
| Other operating expenses | 10 |
| | 2 |
| | 8 |
| | — |
| | 20 |
| (Income) from unconsolidated investments in power plants | — |
| | — |
| | (7 | ) | | — |
| | (7 | ) | Income from operations | 25 |
| | 31 |
| | 145 |
| | — |
| | 201 |
| Interest expense, net of interest income | | | | | | | | | 157 |
| Debt modification costs and other (income) expense, net | | | | | | | | | 18 |
| Income before income taxes | | | | | | | | | $ | 26 |
|
| | | | | | | | | | | | | | | | | | | | | | Three Months Ended June 30, 2014 | | West | | Texas | | East | | Consolidation
and
Elimination | | Total | Revenues from external customers | $ | 487 |
| | $ | 960 |
| | $ | 492 |
| | $ | — |
| | $ | 1,939 |
| Intersegment revenues | 1 |
| | 3 |
| | 27 |
| | (31 | ) | | — |
| Total operating revenues | $ | 488 |
| | $ | 963 |
| | $ | 519 |
| | $ | (31 | ) | | $ | 1,939 |
| Commodity Margin(2) | $ | 228 |
| | $ | 177 |
| | $ | 227 |
| | $ | — |
| | $ | 632 |
| Add: Mark-to-market commodity activity, net and other(1) | 21 |
| | 184 |
| | (24 | ) | | (8 | ) | | 173 |
| Less: | | | | | | | | | | Plant operating expense | 95 |
| | 83 |
| | 103 |
| | (7 | ) | | 274 |
| Depreciation and amortization expense | 58 |
| | 48 |
| | 40 |
| | 1 |
| | 147 |
| Sales, general and other administrative expense | 7 |
| | 18 |
| | 12 |
| | 1 |
| | 38 |
| Other operating expenses | 15 |
| | 1 |
| | 9 |
| | (4 | ) | | 21 |
| (Income) from unconsolidated investments in power plants | — |
| | — |
| | (4 | ) | | — |
| | (4 | ) | Income from operations | 74 |
| | 211 |
| | 43 |
| | 1 |
| | 329 |
| Interest expense, net of interest income | | | | | | | | | 167 |
| Other (income) expense, net | | | | | | | | | 6 |
| Income before income taxes | | | | | | | | | $ | 156 |
|
| | | | | | | | | | | | | | | | | | | | | | Six Months Ended June 30, 2015 | | West | | Texas | | East | | Consolidation and Elimination | | Total | Revenues from external customers | $ | 936 |
| | $ | 1,151 |
| | $ | 1,001 |
| | $ | — |
| | $ | 3,088 |
| Intersegment revenues | 2 |
| | 8 |
| | 4 |
| | (14 | ) | | — |
| Total operating revenues | $ | 938 |
| | $ | 1,159 |
| | $ | 1,005 |
| | $ | (14 | ) | | $ | 3,088 |
| Commodity Margin | $ | 458 |
| | $ | 319 |
| | $ | 415 |
| | $ | — |
| | $ | 1,192 |
| Add: Mark-to-market commodity activity, net and other(3) | 105 |
| | 51 |
| | (22 | ) | | (14 | ) | | 120 |
| Less: | | | | | | | | | | Plant operating expense | 226 |
| | 171 |
| | 149 |
| | (14 | ) | | 532 |
| Depreciation and amortization expense | 132 |
| | 99 |
| | 87 |
| | — |
| | 318 |
| Sales, general and other administrative expense | 16 |
| | 32 |
| | 19 |
| | — |
| | 67 |
| Other operating expenses | 20 |
| | 4 |
| | 16 |
| | — |
| | 40 |
| (Income) from unconsolidated investments in power plants | — |
| | — |
| | (12 | ) | | — |
| | (12 | ) | Income from operations | 169 |
| | 64 |
| | 134 |
| | — |
| | 367 |
| Interest expense, net of interest income | | | | | | | | | 310 |
| Debt modification and extinguishment costs and other (income) expense, net | | | | | | | | | 39 |
| Income before income taxes | | | | | | | | | $ | 18 |
|
| | | | | | | | | | | | | | | | | | | | | | Six Months Ended June 30, 2014 | | West | | Texas | | East | | Consolidation and Elimination | | Total | Revenues from external customers | $ | 978 |
| | $ | 1,607 |
| | $ | 1,319 |
| | $ | — |
| | $ | 3,904 |
| Intersegment revenues | 3 |
| | 15 |
| | 44 |
| | (62 | ) | | — |
| Total operating revenues | $ | 981 |
| | $ | 1,622 |
| | $ | 1,363 |
| | $ | (62 | ) | | $ | 3,904 |
| Commodity Margin(2) | $ | 430 |
| | $ | 298 |
| | $ | 549 |
| | $ | — |
| | $ | 1,277 |
| Add: Mark-to-market commodity activity, net and other(3) | 50 |
| | 138 |
| | (35 | ) | | (17 | ) | | 136 |
| Less: | | | | | | | | | | Plant operating expense | 200 |
| | 173 |
| | 182 |
| | (16 | ) | | 539 |
| Depreciation and amortization expense | 118 |
| | 90 |
| | 91 |
| | 1 |
| | 300 |
| Sales, general and other administrative expense | 17 |
| | 30 |
| | 24 |
| | — |
| | 71 |
| Other operating expenses | 27 |
| | 3 |
| | 16 |
| | (3 | ) | | 43 |
| (Income) from unconsolidated investments in power plants | — |
| | — |
| | (13 | ) | | — |
| | (13 | ) | Income from operations | 118 |
|
| 140 |
|
| 214 |
|
| 1 |
| | 473 |
| Interest expense, net of interest income | | | | | | | | | 332 |
| Debt extinguishment costs and other (income) expense, net | | | | | | | | | 17 |
| Income before income taxes | | | | | | | | | $ | 124 |
|
_________ | | (1) | Includes $(18) million and $(27) million of lease levelization and $3 million and $3 million of amortization expense for the three months ended June 30, 2015 and 2014, respectively. |
| | (2) | Commodity Margin related to the six power plants sold in our East segment on July 3, 2014, was $42 million and $81 million for the three and six months ended June 30, 2014, respectively. |
| | (3) | Includes $(42) million and $(56) million of lease levelization and $7 million and $7 million of amortization expense for the six months ended June 30, 2015 and 2014, respectively. |
|