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Other Long-Term Obligations (Detail) - CAD
CAD in Millions
Sep. 30, 2016
Dec. 31, 2015
Schedule of Other Liabilities [Line Items]    
Employee retirement benefits [1] CAD 1,255 CAD 1,470
Asset retirement obligations and other environmental liabilities [2] 1,682 1,628
Share-based incentive compensation liabilities 154 134
Other obligations 353 365
Total other long-term obligations [3] CAD 3,444 CAD 3,597
[1] Total recorded employee retirement benefits obligations also included $0 million in current liabilities (2015 - $59 million).
[2] Total asset retirement obligations and other environmental liabilities also included $0 million in current liabilities (2015 - $116 million).
[3] Other long-term obligations included amounts to related parties of $114 million (2015 - $146 million).