v3.19.2
financial instruments - Credit risk (Details) - CAD ($)
$ in Millions
Jun. 30, 2019
Dec. 31, 2018
Credit risk    
Maximum exposure (excluding income tax effects) to credit risk $ 3,345 $ 3,435
Cash and temporary investments, net    
Credit risk    
Maximum exposure (excluding income tax effects) to credit risk 217 414
Customer accounts receivable    
Credit risk    
Maximum exposure (excluding income tax effects) to credit risk 1,835 1,600
Contract assets    
Credit risk    
Maximum exposure (excluding income tax effects) to credit risk 1,281 1,318
Derivatives    
Credit risk    
Maximum exposure (excluding income tax effects) to credit risk $ 12 $ 103