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v3.19.3.a.u2

Revenue (Tables) | 12 Months Ended
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Dec. 31, 2019
Disclosure of revenue from contracts with customers [Abstract] |
Disaggregation Of Revenue | The majority of the Corporation's revenues are derived from the sale of physical power, capacity and environmental attributes, leasing of power facilities, and from energy marketing and trading activities, which the Corporation disaggregates into the following groups for the purpose of determining how economic factors affect the recognition of revenue.
Year ended Dec. 31, 2019 | Canadian Coal | US Coal | Canadian Gas | Australian Gas | Wind and Solar | Hydro | Energy Marketing | Corporate | Total
Revenues from contracts with customers | 395 |  | 10 |  | 205 |  | 87 |  | 244 |  | 142 |  | — |  | — |  | 1,083 |
Revenue from leases(1) | 65 |  | — |  | — |  | 65 |  | — |  | — |  | — |  | — |  | 130 |
Revenue from derivatives | (17) |  | 160 |  | 2 |  | — |  | 18 |  | — |  | 129 |  | 4 |  | 296 |
Government incentives | — |  | — |  | — |  | — |  | 8 |  | — |  | — |  | — |  | 8 |
Revenue from other(2) | 373 |  | 401 |  | 2 |  | 8 |  | 42 |  | 14 |  | — |  | (10) |  | 830 |
Total revenue | 816 |  | 571 |  | 209 |  | 160 |  | 312 |  | 156 |  | 129 |  | (6) |  | 2,347 |
Revenues from contracts with customers |  |  |  |  |  |  |  |  |
Timing of revenue recognition |  |  |  |  |  |  |  |  |
At a point in time | 41 |  | 10 |  | — |  | — |  | 27 |  | — |  | — |  | — |  | 78 |
Over time | 354 |  | — |  | 205 |  | 87 |  | 217 |  | 142 |  | — |  | — |  | 1,005 |
Total revenue from contracts with customers | 395 |  | 10 |  | 205 |  | 87 |  | 244 |  | 142 |  | — |  | — |  | 1,083 |
(1) Total rental income, including contingent rent related to certain PPAs and other long-term contracts that meet the criteria of operating leases. (2) Includes merchant revenue and other miscellaneous.
Year ended Dec. 31, 2018 | Canadian Coal | US Coal | Canadian Gas | Australian Gas | Wind and Solar | Hydro | Energy Marketing | Corporate | Total
Revenues from contracts with customers | 517 |  | 9 |  | 224 |  | 91 |  | 206 |  | 132 |  | — |  | — |  | 1,179 |
Revenue from leases(1) | 68 |  | — |  | — |  | 68 |  | 27 |  | 7 |  | — |  | — |  | 170 |
Revenue from derivatives | (1) |  | 115 |  | 4 |  | — |  | (20) |  | — |  | 67 |  | — |  | 165 |
Government incentives | — |  | — |  | — |  | — |  | 16 |  | — |  | — |  | — |  | 16 |
Revenue from other(2) | 328 |  | 318 |  | 4 |  | 6 |  | 53 |  | 17 |  | — |  | (7) |  | 719 |
Total revenue | 912 |  | 442 |  | 232 |  | 165 |  | 282 |  | 156 |  | 67 |  | (7) |  | 2,249 |
Revenues from contracts with customers |  |  |  |  |  |  |  |  |
Timing of revenue recognition |  |  |  |  |  |  |  |  |
At a point in time | 38 |  | 9 |  | — |  | — |  | 18 |  | — |  | — |  | — |  | 65 |
Over time | 479 |  | — |  | 224 |  | 91 |  | 188 |  | 132 |  | — |  | — |  | 1,114 |
Total revenue from contracts with customers | 517 |  | 9 |  | 224 |  | 91 |  | 206 |  | 132 |  | — |  | — |  | 1,179 |
(1) Total rental income, including contingent rent related to certain PPAs and other long-term contracts that meet the criteria of operating leases (2017 - $247 million). (2) Includes merchant revenue and other miscellaneous.
Changes In Contract Liabilities | The Corporation has recognized the following revenue-related contract liabilities:
Contract liabilities |  | 2019 | 2018
Balance, beginning of the year |  | 88 |  | 62 |
IFRS 16 and 15 transition adjustments(1) | 15 |  | 17 |
Amounts transferred to revenue included in opening balance |  | (10) |  | (10) |
Consideration received |  | 5 |  | 13 |
Increases due to interest accrued and expensed during the period |  | 5 |  | 6 |
Contract termination associated with the purchase of Keephills 3 (Note 4(D)) |  | (88) |  | — |
Balance, end of year |  | 15 |  | 88 |
Current portion |  | 1 |  | 8 |
Long-term portion |  | 14 |  | 80 |

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