XML 174 R80.htm IDEA: XBRL DOCUMENT v3.10.0.1
financial instruments - Contract assets (Details) - CAD ($)
$ in Millions
Dec. 31, 2018
Jan. 01, 2018
Dec. 31, 2017
Jan. 01, 2017
Credit risk        
Contract assets $ 1,475 $ 1,303 $ 1,303 $ 1,205
Cost/Gross amount        
Credit risk        
Contract assets 1,549   1,376 1,275
Allowance for doubtful accounts        
Credit risk        
Contract assets (74)   (73) (70)
The twelve month period ending one year hence        
Credit risk        
Contract assets 1,017   907 853
The twelve month period ending one year hence | Cost/Gross amount        
Credit risk        
Contract assets 1,068   958 901
The twelve month period ending one year hence | Allowance for doubtful accounts        
Credit risk        
Contract assets (51)   (51) (48)
The twelve month period ending two years hence        
Credit risk        
Contract assets 444   385 338
The twelve month period ending two years hence | Cost/Gross amount        
Credit risk        
Contract assets 466   407 359
The twelve month period ending two years hence | Allowance for doubtful accounts        
Credit risk        
Contract assets (22)   (22) (21)
Thereafter        
Credit risk        
Contract assets 14   11 14
Thereafter | Cost/Gross amount        
Credit risk        
Contract assets 15   $ 11 15
Thereafter | Allowance for doubtful accounts        
Credit risk        
Contract assets $ (1)     $ (1)