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Segment Reporting | 3 Months Ended
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Mar. 31, 2018
Segment Reporting [Abstract] |
Segment Reporting | Segment Reporting The Company's segment structure reflects how management currently makes financial decisions and allocates resources. The Company's businesses are segregated as follows: Generation, which includes generation, international and BETM; Retail, which includes Mass customers and Business Solutions, which includes C&I customers and other distributed and reliability products; Renewables, which includes solar and wind assets, excluding those in NRG Yield; NRG Yield; and corporate activities. During 2017, NRG Yield acquired several projects totaling 555 MW from NRG. On March 30, 2018, the Company sold to NRG Yield, Inc. 100% of NRG's interests in Buckthorn Renewables, LLC, which owns a 154 MW construction-stage utility-scale solar generation project, located in Texas. These acquisitions were treated as a transfer of entities under common control and accordingly, all historical periods have been recast to reflect the acquisition as if they had occurred at the beginning of the financial statement period. On June 14, 2017, as described in Note 3, Discontinued Operations and Dispositions, NRG deconsolidated GenOn for financial reporting purposes. The financial information for all historical periods have been recast to reflect the presentation of GenOn as discontinued operations within the corporate segment. NRG’s chief operating decision maker, its chief executive officer, evaluates the performance of its segments based on operational measures including adjusted earnings before interest, taxes, depreciation and amortization, or Adjusted EBITDA, free cash flow and capital for allocation, as well as net income/(loss).
| Retail (a) |  | Generation(a) |  | Renewables(a) |  | NRG Yield |  | Corporate(a) |  | Eliminations |  | Total
Three months ended March 31, 2018 |  |  | (In millions)
Operating revenues(a) | $ | 1,481 |  |  | $ | 327 |  |  | $ | 86 |  |  | $ | 225 |  |  | $ | 2 |  |  | $ | 300 |  |  | $ | 2,421 |
Depreciation and amortization | 28 |  |  | 67 |  |  | 51 |  |  | 81 |  |  | 8 |  |  | — |  |  | 235 |
Reorganization costs | 3 |  |  | 4 |  |  | — |  |  | — |  |  | 13 |  |  | — |  |  | 20 |
Equity in earnings/(losses) of unconsolidated affiliates | — |  |  | 2 |  |  | — |  |  | 4 |  |  | (1 | ) |  | (7 | ) |  | (2 | )
Income/(loss) from continuing operations before income taxes | 946 |  |  | (536 | ) |  | (40 | ) |  | (1 | ) |  | (126 | ) |  | (11 | ) |  | 232 |
Income/(loss) from continuing operations | 946 |  |  | (536 | ) |  | (34 | ) |  | — |  |  | (132 | ) |  | (11 | ) |  | 233 |
Net Income/(Loss) | 946 |  |  | (536 | ) |  | (34 | ) |  | — |  |  | (132 | ) |  | (11 | ) |  | 233 |
Net Income/(Loss) attributable to NRG Energy, Inc. | $ | 940 |  |  | $ | (536 | ) |  | $ | 1 |  |  | $ | 21 |  | — |  | $ | (148 | ) |  | $ | 1 |  |  | $ | 279 |
Total assets as of March 31, 2018 | $ | 3,521 |  |  | $ | 7,313 |  |  | $ | 5,191 |  |  | $ | 8,362 |  |  | $ | 9,108 |  |  | $ | (9,743 | ) |  | $ | 23,752 |
(a) Operating revenues include inter-segment sales and net derivative gains and losses of: | $ | 1 |  |  | $ | (307 | ) |  | $ | 8 |  |  | $ | — |  |  | $ | (2 | ) |  | $ | — |  |  | $ | (300 | )
| Retail(a) |  | Generation(a) |  | Renewables(a) |  | NRG Yield |  | Corporate(a)(b) |  | Eliminations |  | Total
Three months ended March 31, 2017 |  |  | (In millions)
Operating revenues(a) | $ | 1,335 |  |  | $ | 965 |  |  | $ | 95 |  |  | $ | 221 |  |  | $ | 10 |  |  | $ | (244 | ) |  | $ | 2,382 |
Depreciation and amortization | 28 |  |  | 97 |  |  | 47 |  |  | 77 |  |  | 8 |  |  | — |  |  | 257 |
Equity in (losses)/earnings of unconsolidated affiliates | — |  |  | (13 | ) |  | — |  |  | 19 |  |  | 3 |  |  | (4 | ) |  | 5 |
(Loss)/income from continuing operations before income taxes | (31 | ) |  | 37 |  |  | (35 | ) |  | (3 | ) |  | (137 | ) |  | (4 | ) |  | (173 | )
(Loss)/income from continuing operations | (34 | ) |  | 37 |  |  | (29 | ) |  | (2 | ) |  | (137 | ) |  | (4 | ) |  | (169 | )
Loss from discontinued operations, net of tax | — |  |  | — |  |  | — |  |  | — |  |  | (34 | ) |  | — |  |  | (34 | )
Net (Loss)/Income | (34 | ) |  | 37 |  |  | (29 | ) |  | (2 | ) |  | (171 | ) |  | (4 | ) |  | (203 | )
Net (Loss)/Income attributable to NRG Energy, Inc. | $ | (33 | ) |  | $ | 37 |  |  | $ | (1 | ) |  | $ | 12 |  |  | $ | (171 | ) |  | $ | (7 | ) |  | $ | (163 | )
(a) Operating revenues include inter-segment sales and net derivative gains and losses of: | $ | 1 |  |  | $ | 209 |  |  | $ | 8 |  |  | $ | — |  |  | $ | 26 |  |  | $ | — |  |  | $ | 244 |
(b) Includes other income - affiliate | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 48 |  |  | $ | — |  |  | $ | 48 |

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -URI http://asc.fasb.org/topic&trid=2134510 + Details
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