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Intangible and other assets (Details) - CAD
CAD in Millions
Dec. 31, 2015
Dec. 31, 2014
Intangible and other assets    
Deferred and long-term receivables CAD 144 CAD 141
Intangible assets 71 62
Investments 69 58
Other 36 37
Total intangible and other assets 320 298
Investments [Abstract]    
Investments, equity method 56 47
Investments, cost method CAD 13 CAD 11