XML 52 R71.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Decommissioning and Other Provisions (Tables)
 12 Months Ended
Dec. 31, 2019
Other Provisions, Contingent Liabilities And Contingent Assets [Abstract]  
Change in decommissioning and other provision balances
The change in decommissioning and other provision balances is as follows:
 
Decommissioning and
restoration
OtherTotal
Balance, Dec. 31, 2017437  33  470  
Liabilities incurred5  17  22  
Liabilities settled(31) (10) (41) 
Accretion24  —  24  
Acquisition of liabilities (Big Level)—  8  8  
Revisions in estimated cash flows2  3  5  
Revisions in discount rates(37) —  (37) 
Reversals—  (5) (5) 
Change in foreign exchange rates7  3  10  
Balance, Dec. 31, 2018407  49  456  
IFRS 16 transition adjustment—  (2) (2) 
Liabilities incurred7  7  14  
Liabilities settled(34) (9) (43) 
Accretion23  —  23  
Acquisition of liabilities16  3  19  
Disposition of liabilities(23) (9) (32) 
Revisions in estimated cash flows(1)
96  7  103  
Revisions in discount rates16  —  16  
Reversals—  (1) (1) 
Change in foreign exchange rates(7) —  (7) 
Balance, Dec. 31, 2019501  45  546  
(1) During 2019, the Corporation adjusted the Centralia mine decommissioning and restoration provision as management no longer believes that the fine coal recovery and reclamation work will occur as originally proposed. Refer to Note 3(A)(III) for further details. In addition, due to the changes in estimated useful lives, described in Note 3(A)(IV), the discount rates used for the Canadian coal and mining operations decommissioning provisions were changed. The use of a lower inflation rate decreased the corresponding liabilities.

 Decommissioning and
restoration		OtherTotal
Balance, Dec. 31, 2018407  49  456  
Current portion35  35  70  
Non-current portion372  14  386  
Balance, Dec. 31, 2019501  45  546  
Current portion36  22  58  
Non-current portion465  23  488