v3.20.1

Revenue from contracts (Tables) | 3 Months Ended
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Mar. 31, 2020
Revenue from contracts |
Schedule of disaggregation of revenue |
|  | Three Months Ended March 31, 2020
|  |  |  |  |  |  |  |  |  |  |  |  | Consolidated
|  | Solid Fuel |  | Natural Gas |  | Hydroelectric |  | Corporate |  | Total
Project revenue: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Energy sales |  | $ | 16.8 |  | $ | 6.2 |  | $ | 17.7 | $ |  | — |  | $ | 40.7
Energy capacity revenue |  |  | 6.3 |  |  | 21.7 |  |  | — |  |  | — |  |  | 28.0
Steam energy and capacity revenue |  |  | — |  |  | 2.7 |  |  | — |  |  | — |  |  | 2.7
Waste heat revenue |  |  | 0.3 |  |  | — |  |  | — |  |  | — |  |  | 0.3
Ancillary and transmission services |  |  | — |  |  | 0.7 |  |  | 0.7 |  |  | — |  |  | 1.4
Asset management and operation |  |  | — |  |  | — |  |  | — |  |  | 0.2 |  |  | 0.2
Miscellaneous revenue |  |  | — |  |  | (0.5) |  |  | — |  |  | — |  |  | (0.5)
|  |  | 23.4 |  |  | 30.8 |  |  | 18.4 |  |  | 0.2 |  |  | 72.8
|  | Three Months Ended March 31, 2019
|  |  |  |  |  |  |  |  |  |  |  |  |  |  | Consolidated
|  |  | Solid Fuel |  |  | Natural Gas |  |  | Hydroelectric |  |  | Corporate |  |  | Total
Project revenue: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Energy sales |  | $ | 10.4 |  | $ | 9.0 |  | $ | 17.6 |  | $ | — |  | $ | 37.0
Energy capacity revenue |  |  | 9.3 |  |  | 20.9 |  |  | — |  |  | — |  |  | 30.2
Steam energy and capacity revenue |  |  | — |  |  | 0.6 |  |  | — |  |  | — |  |  | 0.6
Ancillary and transmission services |  |  | — |  |  | 4.3 |  |  | 0.8 |  |  | — |  |  | 5.1
Asset management and operation |  |  | 0.1 |  |  | (0.1) |  |  | — |  |  | 0.2 |  |  | 0.2
Miscellaneous revenue |  |  | — |  |  | (0.1) |  |  | — |  |  | — |  |  | (0.1)
|  |  | 19.8 |  |  | 34.6 |  |  | 18.4 |  |  | 0.2 |  |  | 73.0

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
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