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Joint Arrangements (Tables)
12 Months Ended
Dec. 31, 2018
Disclosure of interests in other entities [Abstract]  
Disclosure of interests in joint arrangements
Joint arrangements at Dec. 31, 2018, included the following:
Joint operations
Segment
Ownership
 (per cent)
Description
Sheerness
Coal
50
Coal-fired plant in Alberta, of which TA Cogen has a 50 per cent interest, operated by ATCO Power
Genesee Unit 3
Coal
50
Coal-fired plant in Alberta operated by Capital Power Corporation
Keephills Unit 3
Coal
50
Coal-fired plant in Alberta operated by TransAlta
Goldfields Power
Gas
50
Gas-fired plant in Australia operated by TransAlta
Fort Saskatchewan
Gas
60
Cogeneration plant in Alberta, of which TA Cogen has a 60 per cent interest, operated by TransAlta
Fortescue River Gas Pipeline
Gas
43
Natural gas pipeline in Western Australia, operated by DBP Development Group
McBride Lake
Wind
50
Wind generation facility in Alberta operated by TransAlta
Soderglen
Wind
50
Wind generation facility in Alberta operated by TransAlta
Pingston
Hydro
50
Hydro facility in British Columbia operated by TransAlta