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Non-Controlling Interests (Tables) | 12 Months Ended
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Dec. 31, 2022
Interests In Other Entities [Abstract] |
Disclosure of share of ownership and equity participation in TransAlta Renewables | The Company’s subsidiaries and operations that have non-controlling interests are as follows:
Subsidiary/Operation | Non-controlling interest as at Dec. 31, 2022
TransAlta Cogeneration LP | 49.99% — Canadian Power Holdings Inc.
TransAlta Renewables | 39.9% — Public shareholders
Kent Hills Wind LP(1) | 17% — Natural Forces Technologies Inc.
(1) Owned by TransAlta Renewables.
Disclosure of interests in subsidiaries | The net earnings, distributions and equity attributable to non-controlling interests include the 17 per cent non-controlling interest in Kent Hills Wind LP.
Year ended Dec. 31 | 2022 | 2021 | 2020
Revenues | 560 |  | 470 |  | 436 |
Net earnings | 74 |  | 139 |  | 97 |
Total comprehensive income (loss) | (67) |  | 66 |  | 223 |
Amounts attributable to the non-controlling interests: |  |  |
Net earnings | 20 |  | 50 |  | 40 |
Total comprehensive income (loss) | (36) |  | 21 |  | 90 |
Distributions paid to non-controlling interests | 100 |  | 100 |  | 80 |
As at Dec. 31 | 2022 | 2021
Current assets | 240 |  | 430 |
Long-term assets | 2,989 |  | 3,319 |
Current liabilities | (306) |  | (593) |
Long-term liabilities | (1,118) |  | (1,033) |
Total equity | (1,805) |  | (2,123) |
Equity attributable to non-controlling interests | (732) |  | (869) |
Non-controlling interests’ share (per cent) | 39.9 | 39.9
B. TA Cogen
Year ended Dec. 31 | 2022 | 2021 | 2020
Revenues | 347 |  | 265 |  | 146 |
Net earnings (loss) | 143 |  | 103 |  | (13) |
Total comprehensive income (loss) | 143 |  | 103 |  | (13) |
Amounts attributable to the non-controlling interest: |  |  |
Net earnings (loss) | 91 |  | 62 |  | (6) |
Total comprehensive income (loss) | 91 |  | 62 |  | (6) |
Distributions paid to Canadian Power Holdings Inc. | 87 |  | 56 |  | 17 |
As at Dec. 31 | 2022 | 2021
Current assets | 127 |  | 66 |
Long-term assets | 253 |  | 312 |
Current liabilities | (62) |  | (52) |
Long-term liabilities | (27) |  | (36) |
Total equity | (291) |  | (290) |
Equity attributable to Canadian Power Holdings Inc. | (147) |  | (142) |
Non-controlling interest share (per cent) | 49.99 | 49.99
Details of the Company’s principal operating subsidiaries at Dec. 31, 2022, are as follows:
Subsidiary | Country | Ownership (per cent) | Principal activity
TransAlta Generation Partnership | Canada | 100 | Generation and sale of electricity
TransAlta Cogeneration, L.P. | Canada | 50.01 | Generation and sale of electricity
TransAlta Centralia Generation, LLC | US | 100 | Generation and sale of electricity
TransAlta Energy Marketing Corp. | Canada | 100 | Energy marketing
TransAlta Energy Marketing (U.S.), Inc. | US | 100 | Energy marketing
TransAlta Energy (Australia), Pty Ltd. | Australia | 100 | Generation and sale of electricity
TransAlta Renewables Inc. | Canada | 60.1 | Generation and sale of electricity
Associate or joint venture | Country | Ownership (per cent) | Principal activity
SP Skookumchuck Investment, LLC | US | 49 | Generation and sale of electricity
EMG International, LLC | US | 30 | Wastewater treatment and biogas fuel to generate electricity

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