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Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of comprehensive income [abstract]
Net actuarial gains (losses)	$ (3)	$ (7)	$ 5
Gain (losses) on derivatives designated as cash flow hedges, income tax expense (recovery)	8	16	(1)
Reclassification of gains on derivatives designated as cash flow hedges to net earnings, income tax expense	$ 31	$ 10	$ 11

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- Definition

The amount of income tax relating to amounts recognised in other comprehensive income in relation to remeasurements of defined benefit plans. [Refer: Other comprehensive income; Reserve of remeasurements of defined benefit plans; Defined benefit plans [member]]

+ References

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- Definition

Income Tax Expense (Recovery) Relating To Gains On Derivatives Designated As Cash Flow Hedges Of Other Comprehensive Income

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No definition available.

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- Definition

Income Tax Expense (Recovery) Relating To Reclassification Of Gains On Derivatives Designated As Cash Flow Hedges To Net Earnings

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No definition available.

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