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NEW IFRS STANDARDS - Reconciliation (Details)
$ in Millions, $ in Millions
Dec. 31, 2019
CAD ($)
Dec. 31, 2018
USD ($)
NEW IFRS STANDARDS    
Operating leases   $ 2,457
Exemption for short-term leases   (42)
Discounting   (623)
Additional lease liabilities recognized due to adoption of IFRS as at January 1, 2019 $ 2,931 $ 1,792