XML 139 R110.htm IDEA: XBRL DOCUMENT v3.19.1
SEGMENTED INFORMATION - Segmented Assets (Details) - CAD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Disclosure of operating segments [line items]    
Assets $ 71,559 $ 73,867
Head office    
Disclosure of operating segments [line items]    
Assets 110 110
North America | Operating segments    
Disclosure of operating segments [line items]    
Assets 27,199 28,705
North Sea | Operating segments    
Disclosure of operating segments [line items]    
Assets 1,699 1,854
Offshore Africa | Operating segments    
Disclosure of operating segments [line items]    
Assets 1,471 1,331
Other | Operating segments    
Disclosure of operating segments [line items]    
Assets 33 29
Oil Sands Mining and Upgrading | Operating segments    
Disclosure of operating segments [line items]    
Assets 39,634 40,559
Midstream | Operating segments    
Disclosure of operating segments [line items]    
Assets $ 1,413 $ 1,279