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Related Party Transactions | 12 Months Ended
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Dec. 31, 2018
Related Party [Abstract] |
Related Party Transactions | Related-Party Transactions Details of the Corporation’s principal operating subsidiaries at Dec. 31, 2018, 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 | 60.9 | Generation and sale of electricity
Transactions between the Corporation and its subsidiaries have been eliminated on consolidation and are not disclosed. Transactions with Key Management Personnel TransAlta’s key management personnel include the President and CEO and members of the senior management team that report directly to the President and CEO, and the members of the Board. Key management personnel compensation is as follows:
Year ended Dec. 31 | 2018 |  | 2017 |  | 2016 |
Total compensation | 17 |  | 24 |  | 20 |
Comprised of: |  |  |  |  |  |
Short-term employee benefits | 11 |  | 14 |  | 8 |
Post-employment benefits | 2 |  | 2 |  | 2 |
Share-based payments | 4 |  | 8 |  | 10 |

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