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v3.20.4

Provisions (Tables) | 9 Months Ended
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Sep. 30, 2020
Statement [LineItems] |
Summary of Provisions |
|  | As at |
|  | September 30, 2020 |  |  | December 31, 2019 |
Decommissioning liability |  | $ | 60 |  |  | $ | 100 |
Office lease provision |  |  | 35 |  |  |  | 13 |
Total |  | $ | 95 |  |  | $ | 113 |
Current portion |  | $ | 17 |  |  | $ | 16 |
Long-term portion |  | $ | 78 |  |  | $ | 97 |
Summary of Changes to Decommissioning Liability | Changes to the decommissioning liability were as follows:
|  | Nine months ended September 30, 2020 |  |  | Year ended December 31, 2019 |
Balance, beginning of period |  | $ | 100 |  |  | $ | 129 |
Net liabilities added (disposed) (1) |  |  | — |  |  |  | (6 | )
Increase (decrease) due to changes in estimates |  |  | (42 | ) |  |  | (10 | )
Liabilities settled |  |  | (9 | ) |  |  | (14 | )
Transfers from (to) liabilities for assets held for sale |  |  | 7 |  |  |  | (7 | )
Accretion charges |  |  | 4 |  |  |  | 8 |
Balance, end of period |  | $ | 60 |  |  | $ | 100 |
Current portion |  | $ | 8 |  |  | $ | 13 |
Long-term portion |  | $ | 52 |  |  | $ | 87 |
(1) | Includes additions from drilling activity, facility capital spending and disposals related to net property dispositions.
Summary of Changes to Office Lease Provision | Changes to the office lease provision were as follows:
|  | Nine months ended September 30, 2020 |  |  | Year ended December 31, 2019 |
Balance, beginning of period |  | $ | 13 |  |  | $ | 22 |
Net additions (dispositions) |  |  | 26 |  |  |  | (5 | )
Increase (decrease) due to changes in estimates |  |  | 1 |  |  |  | (3 | )
Cash settlements |  |  | (7 | ) |  |  | (2 | )
Accretion charges |  |  | 2 |  |  |  | 1 |
Balance, end of period |  | $ | 35 |  |  | $ | 13 |
Current portion |  | $ | 9 |  |  | $ | 3 |
Long-term portion |  | $ | 26 |  |  | $ | 10 |

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