Overview Financials News + Filings Key Docs Charts Ownership Insiders
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| In millions, except per share items | Dec-31-17 | Dec-31-16 | Dec-31-15 | Dec-31-14 | Dec-31-13 | Dec-31-12 | Dec-31-11 | Dec-31-10 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Revenues |
| Utility Group | 1,383 | 1,378 | 1,395 | 1,570 | 1,430 | 1,334 | 1,457 | 1,564 |
| Nonutility Group | 1,278 | 1,073 | 1,043 | 1,143 | 1,168 | 1,018 | 1,019 | 735 |
| Energy Marketing | | | | | -38 | -18 | -4 | -4 |
| Coal Mining | | | | | -16 | -4 | 17 | 12 |
| Energy Services | | | | | 1 | 6 | 7 | 6 |
| Infrastructure Services | | | | | 49 | 41 | 15 | 3 |
| Other | | | | | 10 | 10 | 5 | 9 |
| |
| Mix |
| Utility Group | 52.0% | 56.3% | 57.3% | 60.1% | 57.4% | 59.7% | 62.7% | 73.4% |
| Nonutility Group | 48.1% | 43.8% | 42.8% | 43.8% | 46.9% | 45.6% | 43.8% | 34.5% |
| Energy Marketing | | | | | -1.5% | -0.8% | -0.2% | -0.2% |
| Coal Mining | | | | | -0.6% | -0.2% | 0.7% | 0.6% |
| Energy Services | | | | | 0.0% | 0.3% | 0.3% | 0.3% |
| Infrastructure Services | | | | | 2.0% | 1.8% | 0.6% | 0.1% |
| Other | | | | | 0.4% | 0.4% | 0.2% | 0.4% |
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| Growth |
| Utility Group | 0.3% | -1.2% | -11.2% | 9.8% | 7.2% | -8.5% | -6.8% | -2.0% |
| Nonutility Group | 19.1% | 2.9% | -8.7% | -2.1% | 14.7% | -0.1% | 38.5% | 9.1% |
| Energy Marketing | | | | | 113.1% | 319.0% | 0.0% | |
| Coal Mining | | | | | 357.1% | -121.1% | 39.5% | |
| Energy Services | | | | | -82.5% | -14.9% | 4.7% | |
| Infrastructure Services | | | | | 21.0% | 171.8% | 380.6% | |
| Other | | | | | 3.0% | 85.2% | -41.9% | |
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