Litigation, Environmental and Other Contingencies Litigation Other Contingency (Details) $ in Millions |
Dec. 31, 2018
CAD ($)
|
---|---|
Government of Canada [Member] | Trans Mountain,Trans Mountain Expansion Project and Other Related Assets [Member] | Backstop [Member] | |
Letters of Credit Outstanding, Amount | $ 500 |
Commitments to Extend Credit [Member] | Trans Mountain and Trans Mountain Expansion Project [Member] | |
Line of Credit Facility, Capacity Available for Specific Purpose Other than for Trade Purchases | $ 500 |