INTANGIBLE ASSETS

12 Months Ended

Dec. 31, 2015

14.INTANGIBLE ASSETS

	Weighted Average		Accumulated
December 31, 2015	Amortization Rate	Cost	Amortization	Net
(millions of Canadian dollars)
Software	11.6%	1,295	516	779
Natural gas supply opportunities	4.0%	484	122	362
Power purchase agreements	3.8%	94	11	83
Land leases, permits and other	4.2%	163	39	124
		2,036	688	1,348

	Weighted Average		Accumulated
December 31, 2014	Amortization Rate	Cost	Amortization	Net
(millions of Canadian dollars)
Software	12.9%	1,049	337	712
Natural gas supply opportunities	3.7%	340	83	257
Power purchase agreements	3.4%	113	11	102
Land leases, permits and other	4.0%	124	29	95
		1,626	460	1,166

Total amortization expense for intangible assets was $158 million (2014 - $106 million) for the year ended December 31, 2015. The Company expects amortization expense for intangible assets for the years ending December 31, 2016 through 2020 of $180 million, $160 million, $144 million, $130 million and $117 million, respectively.