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Leases (Tables) | 12 Months Ended
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Dec. 31, 2019
Disclosure of leases [Abstract] |
Schedule of Lease Assets |
| Product transportation and storage |  |  | Field equipment and power |  |  | Offshore vessels and equipment |  |  | Office leases and other |  |  | Total |
At January 1, 2019 (1) | $ | 823 |  |  | $ | 332 |  |  | $ | 252 |  |  | $ | 132 |  |  | $ | 1,539 |
Additions | 452 |  |  | 43 |  |  | 12 |  |  | 20 |  |  | 527 |
Depreciation | (106 | ) |  | (54 | ) |  | (72 | ) |  | (27 | ) |  | (259 | )
Derecognitions | — |  |  | (6 | ) |  | — |  |  | — |  |  | (6 | )
Foreign exchange adjustments and other | (3 | ) |  | 2 |  |  | (10 | ) |  | (1 | ) |  | (12 | )
At December 31, 2019 | $ | 1,166 |  |  | $ | 317 |  |  | $ | 182 |  |  | $ | 124 |  |  | $ | 1,789 |
(1) | The Company adopted IFRS 16 "Leases" on January 1, 2019 using the modified retrospective approach. At December 31, 2018, the Company did not report any finance leases in accordance with its previous accounting policy for leases.
LEASE ASSETS, BY SEGMENT
|  | Dec 31 2019 |
Exploration and Production |  |
North America |  | $ | 300 |
North Sea |  | 38 |
Offshore Africa |  | 154 |
Oil Sands Mining and Upgrading |  | 1,191 |
Head office |  | 106 |
|  | $ | 1,789 |
Schedule of Lease Liabilities | Lease liabilities at December 31, 2019 were as follows:
|  | Dec 31 2019 |
Lease liabilities |  | $ | 1,809 |
Less: current portion |  | 233 |
|  | $ | 1,576 |
Schedule of Leases Impact on Net Earnings and Cash Flow | Other amounts included in net earnings and cash flows during 2019 are provided below:
|  | Dec 31 2019 |
Expenses relating to short-term leases (1) |  | $ | 448 |
Interest expense on lease liabilities |  | $ | 70 |
Variable lease payments not included in the measurement of lease liabilities |  | $ | 118 |
Total cash outflows for leases (2) |  | $ | 1,178 |
(1) | During 2019, the Company capitalized $305 million of short-term leases as additions to property, plant and equipment.
(2) | Comprised of cash outflows relating to lease liabilities, short-term leases, and variable lease payments.
Reconciliation of IFRS 16 Impact | A reconciliation showing the impact of adoption of the standard is provided below:
|  | Jan 1 2019 |
Leases previously reported as commitments at December 31, 2018 (1) (2) |  | $ | 1,430 |
Impact of discounting |  | (317 | )
Leases previously reported as commitments, discounted at January 1, 2019 |  | 1,113 |
Leases recognized at adoption on January 1, 2019: |  |
Lease extension options and renewals reasonably certain to be exercised |  | 243 |
Arrangements determined to be leases under IFRS 16 |  | 83 |
Leases entered into on behalf of a joint operation (3) |  | 100 |
Lease liabilities recognized at January 1, 2019 |  | $ | 1,539 |
(1) | At December 31, 2018, the Company did not report any finance leases in accordance with its previous accounting policy for leases.
(2) | Commitments for operating leases, previously reported in note 20, are now reported as part of lease liabilities and included in other long-term liabilities in note 12. Operating leases previously reported in note 20 have been aggregated into one line in the reconciliation table. Other non-lease commitments continue to be reported in the table in note 20.
(3) | In accordance with the previous accounting for operating leases used in joint operations, the Company reported commitments and related expenses in accordance with the Company's proportionate interest in these joint operations. Under IFRS 16, where the Company acts as the operator of a joint operation, the Company recognizes 100% of the related lease asset and lease liability.

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- Definition The disclosure of additional information about leasing activities of a lessee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2019-01-01 -Paragraph 59 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_59&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The disclosure of quantitative information about right-of-use assets. [Refer: Right-of-use assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2019-01-01 -Paragraph 53 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_53&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The explanation of the difference between: (a) operating lease commitments disclosed applying IAS 17 at the end of the annual reporting period immediately preceding the date of initial application of IFRS 16, discounted using the incremental borrowing rate at the date of initial application; and (b) lease liabilities recognised in the statement of financial position at the date of initial application of IFRS 16. The incremental borrowing rate is the rate of interest that a lessee would have to pay to borrow over a similar term, and with a similar security, the funds necessary to obtain an asset of a similar value to the right-of-use asset in a similar economic environment. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2019-01-01 -Paragraph C12 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_C12_b&doctype=Appendix&subtype=C -URIDate 2019-03-27 + Details
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