Annual report pursuant to Section 13 and 15(d)

BENEFIT PLANS (Asset Allocation Ranges and Actual Allocation, CRIP) (Detail)

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BENEFIT PLANS (Asset Allocation Ranges and Actual Allocation, CRIP) (Detail) - Canadian Retirement Income Plan, or CRIP
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Canadian Equities    
Defined Benefit Plan Disclosure [Line Items]    
Range minimum 25.00%  
Range maximum 50.00%  
Actual 34.60% 34.90%
International Equities (including U.S. Equities)    
Defined Benefit Plan Disclosure [Line Items]    
Range minimum 0.00%  
Range maximum 19.00%  
Actual 15.10% 14.80%
Fixed Income    
Defined Benefit Plan Disclosure [Line Items]    
Range minimum 40.00%  
Range maximum 60.00%  
Actual 49.30% 49.30%
Money Market    
Defined Benefit Plan Disclosure [Line Items]    
Range minimum 0.00%  
Range maximum 10.00%  
Actual 1.00% 1.00%