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Significant Events - Financing of a Quebec Wind Asset by TransAlta Renewables (Details) - CAD ($) $ in Millions	Jul. 20, 2018	Jun. 03, 2016
Disclosure of detailed information about borrowings [line items]
Bonds issued	$ 345
TransAlta Renewables
Disclosure of detailed information about borrowings [line items]
Bonds issued		$ 159

X

- Definition

The amount of bonds issued by the entity.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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+ References

No definition available.

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