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Maturity Of Lease Liabilities (Detail) - CAD ($) $ in Millions	Dec. 31, 2019	Jan. 01, 2019
Operating Lease
2020	$ 121
2021	70
2022	30
2023	13
2024	11
2025 and beyond	30
Total lease payments	275
Discount to present value	(17)
Total lease liability	$ 258	$ 298
Weighted average remaining lease term (years)	4 years
Weighted average discount rate (percent)	2.60%
Finance Lease
2020	$ 71
2021	50
2022	49
2023	48
2024	47
2025 and beyond	1,086
Total lease payments	1,351
Discount to present value	(804)
Total lease liability	$ 547
Weighted average remaining lease term (years)	40 years
Weighted average discount rate (percent)	7.50%

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