Decommissioning Liabilities (Tables)

12 Months Ended

Dec. 31, 2019

Provision For Decommissioning Restoration And Rehabilitation Costs [Abstract]

Summary of Decommissioning Provision

The aggregate carrying amount of the obligation is:

	2019			2018
Decommissioning Liabilities, Beginning of Year		875			1,029
Liabilities Incurred		3			8
Liabilities Settled		(52	)		(44	)
Liabilities Disposed		(8	)		(30	)
Transfers (to) From Liabilities Related to Assets Held for Sale		-			149
Change in Estimated Future Cash Flows		21			(136	)
Change in Discount Rate		339			(165	)
Unwinding of Discount on Decommissioning Liabilities (Note 6)		58			63
Foreign Currency Translation		(1	)		1
Decommissioning Liabilities, End of Year		1,235			875

Summary of Changes to the Credit-Adjusted Risk-Free Rate or the Inflation Rate Impact on the Decommissioning Liabilities

Changes to the credit-adjusted risk-free rate or the inflation rate would have the following impact on the decommissioning liabilities:

	2019						2018
As at December 31,	Credit-Adjusted Risk-Free Rate			Inflation Rate			Credit-Adjusted Risk-Free Rate			Inflation Rate
One Percent Increase		(236	)		340			(138	)		196
One Percent Decrease		332			(243	)		188			(145	)