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Finance Charges (Details) - CAD CAD in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Interest
- Long-term debt and capital lease and finance obligations	CAD 658	CAD 572
- Short-term borrowings	10	8
Acquisition credit facilities (Notes 27 and 32)	39	0
Debt component of AFUDC	(29)	(27)
Finance charges	CAD 678	CAD 553

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- Definition

Business Combination, Acquisition Related Costs, Nonoperating

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Public Utilities, Allowance for Funds Used During Construction, Debt Component

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- Definition

Amount of the cost of borrowed funds accounted for as interest expense.

+ References

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-SubTopic 20
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Aggregate amount of interest paid or due on all long-term debt.

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The aggregate interest expense incurred on short-term borrowings including commercial paper and Federal funds purchased and securities sold under agreements to repurchase.

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