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Revenue (Tables) | 12 Months Ended
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Dec. 31, 2024
Disclosure of revenue from contracts with customers [Abstract] |
Disclosure of disaggregation of revenue | The majority of the Company's revenues are derived from the sale of power, capacity and environmental and tax attributes, leasing of power facilities and from asset optimization activities, which the Company disaggregates into the following groups for the purpose of determining how economic factors affect the recognition of revenue.
Year ended Dec. 31, 2024 | Hydro | Wind and Solar | Gas | Energy Transition | Energy Marketing | Corporate(1) | Total
Revenues from contracts with customers |  |  |  |  |  |  |
Power and other | 36 |  | 242 |  | 494 |  | 12 |  | — |  | — |  | 784 |
Environmental and tax attributes(2) | 61 |  | 77 |  | 2 |  | — |  | — |  | (34) |  | 106 |
Revenue from contracts with customers | 97 |  | 319 |  | 496 |  | 12 |  | — |  | (34) |  | 890 |
Revenue from derivatives and other trading activities(3) | 16 |  | (69) |  | 282 |  | 311 |  | 168 |  | — |  | 708 |
Revenue from merchant sales | 287 |  | 71 |  | 546 |  | 291 |  | — |  | — |  | 1,195 |
Other(4) | 9 |  | 15 |  | 26 |  | 2 |  | — |  | — |  | 52 |
Total revenue | 409 |  | 336 |  | 1,350 |  | 616 |  | 168 |  | (34) |  | 2,845 |
Revenues from contracts with customers |  |  |  |  |  |  |
Timing of revenue recognition |  |  |  |  |  |  |
At a point in time | 61 |  | 28 |  | — |  | 12 |  | — |  | (34) |  | 67 |
Over time | 36 |  | 291 |  | 496 |  | — |  | — |  | — |  | 823 |
Total revenue from contracts with customers | 97 |  | 319 |  | 496 |  | 12 |  | — |  | (34) |  | 890 |
(1)The elimination of intercompany sales is reflected in the Corporate segment. (2)The environmental and tax attributes represent environmental attributes and production tax transfer sales not bundled with power and other sales. (3)Represents realized and unrealized gains or losses from hedging and derivative positions. Volatility and pricing in commodity markets can vary significantly from period to period and impact movements in derivative positions. (4)Other revenue includes production tax credits related to U.S. wind facilities subject to tax equity financing arrangements, total lease income from long-term contracts that meet the criteria of operating leases and other miscellaneous revenues.
Year ended Dec. 31, 2023 | Hydro | Wind and Solar | Gas | Energy Transition | Energy Marketing | Corporate | Total
Revenues from contracts with customers |  |  |  |  |  |  |
Power and other(1) | 30 |  | 204 |  | 400 |  | 12 |  | — |  | — |  | 646 |
Environmental and tax attributes(2) | 14 |  | 26 |  | — |  | — |  | — |  | — |  | 40 |
Revenue from contracts with customers | 44 |  | 230 |  | 400 |  | 12 |  | — |  | — |  | 686 |
Revenue from derivatives and other trading activities(1)(3) | 44 |  | (16) |  | (172) |  | 251 |  | 220 |  | — |  | 327 |
Revenue from merchant sales | 434 |  | 104 |  | 1,247 |  | 488 |  | — |  | — |  | 2,273 |
Other(4) | 11 |  | 18 |  | 39 |  | — |  | — |  | 1 |  | 69 |
Total revenue | 533 |  | 336 |  | 1,514 |  | 751 |  | 220 |  | 1 |  | 3,355 |
Revenues from contracts with customers |  |  |  |  |  |  |
Timing of revenue recognition |  |  |  |  |  |  |
At a point in time | 14 |  | 26 |  | — |  | 12 |  | — |  | — |  | 52 |
Over time | 30 |  | 204 |  | 400 |  | — |  | — |  | — |  | 634 |
Total revenue from contracts with customers | 44 |  | 230 |  | 400 |  | 12 |  | — |  | — |  | 686 |
(1)In the Wind and Solar segment, $14 million of mark-to-market losses were reclassified from revenue from contracts with customers to revenue from derivatives and other trading activities to conform to the current period presentation. (2)The environmental and tax attributes represent environmental attributes and production tax transfer sales not bundled with power and other sales. (3)Represents realized and unrealized gains or losses from hedging and derivative positions. Volatility and pricing in commodity markets can vary significantly from period to period and impact movements in derivative positions. (4)Other revenue includes production tax credits related to U.S. wind facilities subject to tax equity financing arrangements, total lease income from long-term contracts that meet the criteria of operating leases and other miscellaneous revenues.
Year ended Dec. 31, 2022 | Hydro | Wind and Solar | Gas | Energy Transition | Energy Marketing | Corporate | Total
Revenues from contracts with customers |  |  |  |  |  |  |
Power and other | 33 |  | 220 |  | 462 |  | 10 |  | — |  | — |  | 725 |
Environmental and tax attributes(1) | 1 |  | 50 |  | — |  | — |  | — |  | — |  | 51 |
Revenue from contracts with customers | 34 |  | 270 |  | 462 |  | 10 |  | — |  | — |  | 776 |
Revenue from derivatives and other trading activities(2) | — |  | (121) |  | (821) |  | 243 |  | 160 |  | (2) |  | (541) |
Revenue from merchant sales | 564 |  | 119 |  | 1,529 |  | 461 |  | — |  | — |  | 2,673 |
Other(3) | 8 |  | 21 |  | 39 |  | — |  | — |  | — |  | 68 |
Total revenue | 606 |  | 289 |  | 1,209 |  | 714 |  | 160 |  | (2) |  | 2,976 |
Revenues from contracts with customers |  |  |  |  |  |  |
Timing of revenue recognition |  |  |  |  |  |  |
At a point in time | 1 |  | 50 |  | — |  | 12 |  | — |  | — |  | 63 |
Over time | 33 |  | 220 |  | 462 |  | (2) |  | — |  | — |  | 713 |
Total revenue from contracts with customers | 34 |  | 270 |  | 462 |  | 10 |  | — |  | — |  | 776 |
(1)The environmental and tax attributes represent environmental attributes and production tax transfer sales not bundled with power and other sales. (2)Represents realized and unrealized gains or losses from hedging and derivative positions. Volatility and pricing in commodity markets can vary significantly from period to period and impact movements in derivative positions. (3)Other revenue includes production tax credits related to U.S. wind facilities subject to tax equity financing arrangements, total lease income from long-term contracts that meet the criteria of operating leases and other miscellaneous revenues.

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