Non-Controlling Interests (Tables)

12 Months Ended

Dec. 31, 2017

Interests In Other Entities [Abstract]

Share of ownership and equity participation in TransAlta Renewables

The Corporation’s subsidiaries and operations that have non-controlling interests are as follows:



Subsidiary/Operation	Non-controlling interest as at Dec. 31, 2017
TransAlta Cogeneration L.P.	49.99% - Canadian Power Holdings Inc.
TransAlta Renewables	36% - Public shareholders
Kent Hills Wind LP⁽¹⁾	17% - Natural Forces Technologies Inc.

(1) Owned by TransAlta Renewables.

Subsidiaries and operations with non-controlling interests

As a result of the conversion of Class B shares and the transactions described in Note 4, the Corporation’s share of ownership and equity participation in TransAlta Renewables has fluctuated since its formation as follows:



Period	Ownership and voting rights percentage	Equity participation percentage
April 29, 2014 to May 6, 2015	70.3	70.3
May 7, 2015 to Nov. 25, 2015	76.1	72.8
Nov. 26, 2015 to Jan. 5, 2016	66.6	62.0
Jan. 6, 2016 to July 31, 2017	64.0	59.8
Aug. 1, 2017 and thereafter	64.0	64.0

Disclosure of interests in subsidiaries



Year ended Dec. 31	2017		2016	2015
Revenues	459		259	236
Net earnings	13		1	198
Total comprehensive income	(24	)	40	204
Amounts attributable to the non-controlling interests:
Net earnings	11		2	63
Total comprehensive income	—		18	65
Distributions paid to non-controlling interests	85		83	43



As at Dec. 31	2017		2016
Current assets	145		109
Long-term assets	3,483		3,732
Current liabilities	(356	)	(537	)
Long-term liabilities	(1,075	)	(1,237	)
Total equity	(2,197	)	(2,067	)
Equity attributable to non-controlling interests	(812	)	(851	)
Non-controlling interests’ share (per cent)	36.0		40.2

B. TA Cogen



Year ended Dec. 31	2017	2016	2015
Results of operations
Revenues	175	274	288
Net earnings	61	211	61
Total comprehensive income	61	258	77
Amounts attributable to the non-controlling interest:
Net earnings	31	105	31
Total comprehensive income	31	128	38
Distributions paid to Canadian Power Holdings Inc.	87	68	56



As at Dec. 31	2017		2016
Current assets	193		171
Long-term assets	404		538
Current liabilities	(73	)	(65	)
Long-term liabilities	(26	)	(35	)
Total equity	(498	)	(609	)
Equity attributable to Canadian Power Holdings Inc.	(247	)	(301	)
Non-controlling interest share (per cent)	49.99		49.99

Details of the Corporation’s principal operating subsidiaries at Dec. 31, 2017 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	64.0	Generation and sale of electricity