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Trade and Other Receivables - Schedule of Trade and Other Receivables (Detail) - CAD
CAD in Millions
Dec. 31, 2017
Dec. 31, 2016
Trade and other receivables [abstract]    
Trade receivables, net of allowance CAD 746.6 CAD 740.7
Holdbacks, current 43.8 45.0
Other 25.7 20.7
Trade and other receivables CAD 816.1 CAD 806.4