XML 160 R127.htm IDEA: XBRL DOCUMENT v3.6.0.2
COMMITMENTS, CONTINGENCIES AND GUARANTEES - Other Commitments and Contingencies (Details)
CAD in Millions, $ in Billions
12 Months Ended
Dec. 31, 2016
CAD
Dec. 31, 2015
CAD
Jan. 06, 2016
USD ($)
Dec. 31, 2014
CAD
Contingencies        
Amount accrued related to operating facilities for the estimated expenses to remediate the sites CAD 39 CAD 32   CAD 31
Recover amount under claim (more than) | $     $ 15  
Canadian Natural Gas Pipelines | Capital expenditures        
Other Commitments        
Commitment for capital expenditures 800 500    
U.S. Natural Gas Pipelines | Capital expenditures        
Other Commitments        
Commitment for capital expenditures 100 200    
Mexico Natural Gas Pipelines | Capital expenditures        
Other Commitments        
Commitment for capital expenditures 2,100 200    
Liquids Pipelines | Capital expenditures        
Other Commitments        
Commitment for capital expenditures 200 800    
Energy | Capital expenditures        
Other Commitments        
Commitment for capital expenditures 500 600    
Corporate | Capital expenditures        
Other Commitments        
Commitment for capital expenditures CAD 200 CAD 100