v2.3.0.11

Segment Information (Details) (USD $) In Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2011 | Jun. 30, 2010 | Jun. 30, 2011 | Jun. 30, 2010
Segment Information [Line Items] |  |  |  |
Revenues from external customers | $ 1,633 | $ 1,430 | $ 3,132 | $ 2,944
Intersegment revenues |  |  |  |
Total operating revenues | 1,633 | 1,430 | 3,132 | 2,944
Commodity Margin | 602 | 533 | 1,091 | 963
Mark-to-Market Commodity Activity, Net and Other Revenue | 29 | (12) | (32) | 103
Plant operating expense | 261 | 213 | 499 | 431
Depreciation and amortization expense | 131 | 135 | 262 | 271
Sales, general and other administrative expense | 34 | 50 | 66 | 72
Other operating expense | 22 | 26 | 42 | 52
(Income) from unconsolidated investments in power plants | (2) | 6 | 7 | 13
Income from operations | 183 | 108 | 201 | 258
Interest expense, net of interest income | 190 | 220 | 378 | 399
(Gain) loss on interest rate derivatives, net | 37 | (8) | 146 | 3
Debt Extinguishment Costs and Other (Income) Expense, Net | 8 | 8 | 108 | 13
Loss before income taxes and discontinued operations | (52) | (112) | (431) | (157)
RGGI Compliance and Other Environmental Costs | 2 | 5 | 4 | 5
West |  |  |  |
Segment Information [Line Items] |  |  |  |
Revenues from external customers | 466 | 525 | 1,065 | 1,190
Intersegment revenues | 1 | 1 | 4 | 5
Total operating revenues | 467 | 526 | 1,069 | 1,195
Commodity Margin | 236 | 258 | 469 | 471
Mark-to-Market Commodity Activity, Net and Other Revenue | 11 | 10 | 16 | 18
Plant operating expense | 116 | 88 | 203 | 178
Depreciation and amortization expense | 42 | 50 | 88 | 103
Sales, general and other administrative expense | 8 | 11 | 19 | 26
Other operating expense | 11 | 12 | 19 | 29
(Income) from unconsolidated investments in power plants |  |  |  |
Income from operations | 70 | 107 | 156 | 153
Texas |  |  |  |
Segment Information [Line Items] |  |  |  |
Revenues from external customers | 646 | 552 | 1,096 | 1,079
Intersegment revenues | 5 | 6 | 10 | 10
Total operating revenues | 651 | 558 | 1,106 | 1,089
Commodity Margin | 128 | 128 | 195 | 235
Mark-to-Market Commodity Activity, Net and Other Revenue | 27 | (10) | (33) | 86
Plant operating expense | 63 | 78 | 143 | 162
Depreciation and amortization expense | 35 | 40 | 65 | 76
Sales, general and other administrative expense | 13 | 16 | 23 | 16
Other operating expense | 3 | (5) | 3 | 2
(Income) from unconsolidated investments in power plants |  |  |  |
Income from operations | 41 | (11) | (72) | 65
North |  |  |  |
Segment Information [Line Items] |  |  |  |
Revenues from external customers | 324 | 134 | 595 | 257
Intersegment revenues | 5 | 1 | 13 | 2
Total operating revenues | 329 | 135 | 608 | 259
Commodity Margin | 179 | 79 | 314 | 131
Mark-to-Market Commodity Activity, Net and Other Revenue |  | 3 | 4 |
Plant operating expense | 47 | 23 | 92 | 45
Depreciation and amortization expense | 33 | 19 | 66 | 39
Sales, general and other administrative expense | 6 | 22 | 12 | 25
Other operating expense | 9 | 7 | 16 | 15
(Income) from unconsolidated investments in power plants | 2 | (6) | (7) | (13)
Income from operations | 82 | 17 | 139 | 20
Southeast |  |  |  |
Segment Information [Line Items] |  |  |  |
Revenues from external customers | 197 | 219 | 376 | 418
Intersegment revenues | 40 | 21 | 85 | 44
Total operating revenues | 237 | 240 | 461 | 462
Commodity Margin | 59 | 68 | 113 | 126
Mark-to-Market Commodity Activity, Net and Other Revenue |  | (9) | (4) | 13
Plant operating expense | 41 | 31 | 74 | 59
Depreciation and amortization expense | 22 | 27 | 45 | 56
Sales, general and other administrative expense | 6 | 2 | 11 | 6
Other operating expense | 2 | (1) | 3 | 2
(Income) from unconsolidated investments in power plants |  |  |  |
Income from operations | (12) |  | (24) | 16
Consolidation and Elimination |  |  |  |
Segment Information [Line Items] |  |  |  |
Revenues from external customers |  |  |  |
Intersegment revenues | (51) | (29) | (112) | (61)
Total operating revenues | (51) | (29) | (112) | (61)
Commodity Margin |  |  |  |
Mark-to-Market Commodity Activity, Net and Other Revenue | (9) | (6) | (15) | (14)
Plant operating expense | (6) | (7) | (13) | (13)
Depreciation and amortization expense | (1) | (1) | (2) | (3)
Sales, general and other administrative expense | 1 | (1) | 1 | (1)
Other operating expense | (5) | 8 | (3) | (1)
(Income) from unconsolidated investments in power plants |  |  |  |
Income from operations | $ 2 | $ (5) | $ 2 | $ 4

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- Definition The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 5 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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- Definition Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 5 -Section 03 -Paragraph 1 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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- Definition Amount of total revenue for the reportable segments, including revenue from external customers, transactions with other operating segments of the same entity, and (gross) interest revenue. All considered to be "operating revenue" for purposes of the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph a, b, c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a),(b),(c) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8736-108599 + Details
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