GOODWILL (Tables)

12 Months Ended

Dec. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of goodwill

	Liquids Pipelines		Gas Transmission & Midstream		Gas Distribution		Green Power and Transmission	Energy Services	Eliminations and Other		Consolidated
(millions of Canadian dollars)
Gross Cost
Balance at January 1, 2017	59		457		7		—	2	13		538
Acquired in Merger Transaction (Note 8)	8,070		22,914		5,672		—	—	—		36,656
Sabal Trail deconsolidation (Note 13)	—		(966	)	—		—	—	—		(966	)
Disposition	(29	)	—		—		—	—	—		(29	)
Foreign exchange and other	(314	)	(866	)	—		—	—	—		(1,180	)
Balance at December 31, 2017	7,786		21,539		5,679		—	2	13		35,019
Disposition	—		(628	)	—		—	—	—		(628	)
Allocation to assets held for sale	—		(55	)	(133	)	—	—	—		(188	)
Foreign exchange and other	538		1,482		(183	)	—	—	—		1,837
Balance at December 31, 2018	8,324		22,338		5,363		—	2	13		36,040
Accumulated Impairment
Balance at January 1, 2017	—		(440	)	(7	)	—	—	(13	)	(460	)
Impairment	—		(102	)	—		—	—	—		(102	)
Balance at December 31, 2017	—		(542	)	(7	)	—	—	(13	)	(562	)
Impairment	—		(1,019	)	—		—	—	—		(1,019	)
Balance at December 31, 2018	—		(1,561	)	(7	)	—	—	(13	)	(1,581	)
Carrying Value
Balance at December 31, 2017	7,786		20,997		5,672		—	2	—		34,457
Balance at December 31, 2018	8,324		20,777		5,356		—	2	—		34,459