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Revenue (Tables) | 12 Months Ended
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Dec. 31, 2022
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 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, 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 attributes(1) | 1 |  | 50 |  | — |  | — |  | — |  | — |  | 51 |
Revenue from contracts with customers | 34 |  | 270 |  | 462 |  | 10 |  | — |  | — |  | 776 |
Revenue from leases(2) | — |  | — |  | 32 |  | — |  | — |  | — |  | 32 |
Revenue from derivatives and other trading activities(3) | — |  | (87) |  | (821) |  | 243 |  | 160 |  | (2) |  | (507) |
Revenue from merchant sales | 564 |  | 86 |  | 1,529 |  | 461 |  | — |  | — |  | 2,640 |
Other | 8 |  | 20 |  | 7 |  | — |  | — |  | — |  | 35 |
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 attributes represent environmental attribute sales not bundled with power and other sales. (2) Total lease income from long-term contracts that meet the criteria of operating leases. (3) Represents realized and unrealized gains or losses from hedging and derivative positions.
Year ended Dec. 31, 2021 | Hydro | Wind and Solar | Gas | Energy Transition | Energy Marketing | Corporate | Total
Revenues from contracts with customers |  |  |  |  |  |  |
Power and other | 28 |  | 207 |  | 395 |  | 24 |  | — |  | — |  | 654 |
Environmental attributes(1) | — |  | 28 |  | — |  | — |  | — |  | — |  | 28 |
Revenue from contracts with customers | 28 |  | 235 |  | 395 |  | 24 |  | — |  | — |  | 682 |
Revenue from leases(2) | — |  | — |  | 19 |  | — |  | — |  | — |  | 19 |
Revenue from derivatives and other trading activities(3) | — |  | (14) |  | (118) |  | 138 |  | 211 |  | 4 |  | 221 |
Revenue from merchant sales | 345 |  | 68 |  | 808 |  | 546 |  | — |  | — |  | 1,767 |
Other | 10 |  | 16 |  | 5 |  | 1 |  | — |  | — |  | 32 |
Total revenue | 383 |  | 305 |  | 1,109 |  | 709 |  | 211 |  | 4 |  | 2,721 |
Revenues from contracts with customers |  |  |  |  |  |  |
Timing of revenue recognition |  |  |  |  |  |  |
At a point in time | — |  | 28 |  | 2 |  | 23 |  | — |  | — |  | 53 |
Over time | 28 |  | 207 |  | 393 |  | 1 |  | — |  | — |  | 629 |
Total revenue from contracts with customers | 28 |  | 235 |  | 395 |  | 24 |  | — |  | — |  | 682 |
(1) The environmental attributes represent environmental attribute sales not bundled with power and other sales. (2) Total lease income from long-term contracts that meet the criteria of operating leases. (3) Represents realized and unrealized gains or losses from hedging and derivative positions. Wind and Solar has been revised to present revenue classifications consistent with current period.
Year ended Dec. 31, 2020 | Hydro | Wind and Solar | Gas | Energy Transition | Energy Marketing | Corporate | Total
Revenues from contracts with customers |  |  |  |  |  |  |
Power and other | 141 |  | 238 |  | 465 |  | 156 |  | — |  | — |  | 1,000 |
Environmental attributes(1) | — |  | 23 |  | — |  | — |  | — |  | — |  | 23 |
Revenue from contracts with customers | 141 |  | 261 |  | 465 |  | 156 |  | — |  | — |  | 1,023 |
Revenue from leases(2) | — |  | — |  | 123 |  | — |  | — |  | — |  | 123 |
Revenue from derivatives and other trading activities(3) | — |  | 8 |  | (8) |  | 283 |  | 122 |  | 12 |  | 417 |
Revenue from merchant sales | 3 |  | 49 |  | 200 |  | 264 |  | — |  | — |  | 516 |
Other(4) | 8 |  | 11 |  | 7 |  | 1 |  | — |  | (5) |  | 22 |
Total revenue | 152 |  | 329 |  | 787 |  | 704 |  | 122 |  | 7 |  | 2,101 |
Revenues from contracts with customers |  |  |  |  |
Timing of revenue recognition |  |  |  |  |  |  |
At a point in time | — |  | 25 |  | 7 |  | 26 |  | — |  | — |  | 58 |
Over time | 141 |  | 236 |  | 458 |  | 130 |  | — |  | — |  | 965 |
Total revenue from contracts with customers | 141 |  | 261 |  | 465 |  | 156 |  | — |  | — |  | 1,023 |
(1) The environmental attributes represent environmental attribute sales not bundled with power and other sales. (2) Total lease income from certain PPAs and long-term contracts that meet the criteria of operating leases. (3) Represents realized and unrealized gains or losses from hedging and derivative positions. Wind and Solar has been revised to present revenue classifications consistent with current period. (4) Includes government incentives and other miscellaneous.

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