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Schedule of Non Cancelable Operating Leases (Detail)
$ in Millions
Dec. 31, 2018
CAD ($)
Operating Leased Assets [Line Items]  
2019 $ 130
2020 82
2021 43
2022 13
2023 11
2024 and beyond 12
Total lease payments under minimum commitments $ 291 [1]
[1] Net rental cost under cancelable and non-cancelable operating leases incurred in 2018 was $221 million (2017 - $206 million, 2016 - $253 million). Related rental income was not material.