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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of comprehensive income [abstract]
Unrealized income (loss), tax	$ 9	$ 3	$ 2
Reclassification to net earnings (loss), tax	$ 5	$ 2	$ 2

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- Definition

Income Tax Relating To Gains (Losses) On Cash Flow Hedges Of Other Comprehensive Income

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- Definition

Income Tax Relating To Reclassification Adjustments On Cash Flow Hedges Of Other Comprehensive Income

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