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Regulatory Assets and Liabilities (Tables)

12 Months Ended

Dec. 31, 2016

Regulatory Assets and Liabilities Disclosure [Abstract]

Schedule Of Regulatory Assets and Liabilities [Table Text Block]

As at		December 31		December 31
millions of Canadian dollars		2016		2015
Regulatory assets
Deferred income tax regulatory assets	$	632	$	431
Pension and post-retirement medical plan		373		12
Environmental remediations		49		-
Unamortized defeasance costs		39		46
2015 demand side management deferral		32		36
GBPC Hurricane Matthew restoration		28		-
Stranded cost recovery		27		28
Debt basis adjustment		19		-
Deferrals related to derivative instruments		15		68
Cost-recovery clauses		12		-
Deferred bond refinancing costs		9		-
Regulated fuel adjustment mechanism		-		14
Other		87		64
	$	1,322	$	699
Current	$	80	$	94
Long-term		1,242		605
Total regulatory assets	$	1,322	$	699
Regulatory liabilities
Accumulated reserve - cost of removal		990		94
Deferrals related to derivative instruments		230	$	210
Cost-recovery clauses		153		-
Regulated fuel adjustment mechanism		94		42
Transmission and delivery storm reserve		75		-
Self-insurance fund (notes 7 and 33)		30		87
Deferred income tax regulatory liabilities		26		18
Bill reduction credit (note 4)		10		-
Other		31		14
	$	1,639	$	465
Current	$	362	$	112
Long-term		1,277		353
Total regulatory liabilities	$	1,639	$	465

Fuel Adjustment Mechanism [Table Text Block]

For the		Year ended December 31
millions of Canadian dollars		2016		2015
(Over) under recovery of current period Fuel costs	$	29	$	(24)
Recovery from customers of prior years’ Fuel costs		12		56
Application of non-fuel revenues		20		45
Regulated fixed cost deferral related to 2015 demand side management		-		(35)
Regulated fuel adjustment mechanism	$	61	$	42