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SUPPLEMENTARY OIL & GAS INFORMATION (Unaudited) - Results of Operations from Crude Oil and Natural Gas Producing Activities (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Supplementary Oil & Gas Information [Line Items] |  |  |  |
Crude oil and natural gas revenue, net of royalties, blending and feedstock costs | $ 22,871 | $ 21,027 | $ 17,342 |
Production | (6,277) | (6,464) | (5,675) | [1]
Transportation | (4,699) | (4,189) | (3,529) | [1]
Depletion, depreciation and amortization | (5,546) | (5,161) | (5,186) |
Asset retirement obligation accretion | (190) | (186) | (164) |
Income tax | (434) | (374) | 164 |
Oil And Gas |  |  |  |
Supplementary Oil & Gas Information [Line Items] |  |  |  |
Crude oil and natural gas revenue, net of royalties, blending and feedstock costs | 18,944 | 17,603 | 14,445 |
Production | (6,201) | (6,385) | (5,588) |
Transportation | (989) | (953) | (822) |
Depletion, depreciation and amortization | (5,532) | (5,147) | (5,177) |
Asset retirement obligation accretion | (190) | (186) | (164) |
Petroleum revenue tax | 88 | 12 | 78 |
Income tax | (1,652) | (1,350) | (726) |
Results of operations | 4,468 | 3,594 | 2,046 |
Oil And Gas | North America |  |  |  |
Supplementary Oil & Gas Information [Line Items] |  |  |  |
Crude oil and natural gas revenue, net of royalties, blending and feedstock costs | 17,348 | 16,065 | 13,083 |
Production | (5,701) | (5,772) | (4,962) |
Transportation | (968) | (929) | (790) |
Depletion, depreciation and amortization | (4,982) | (4,689) | (4,463) |
Asset retirement obligation accretion | (156) | (148) | (128) |
Petroleum revenue tax | 0 | 0 | 0 |
Income tax | (1,468) | (1,223) | (740) |
Results of operations | 4,073 | 3,304 | 2,000 |
Oil And Gas | North Sea |  |  |  |
Supplementary Oil & Gas Information [Line Items] |  |  |  |
Crude oil and natural gas revenue, net of royalties, blending and feedstock costs | 920 | 891 | 784 |
Production | (391) | (405) | (400) |
Transportation | (19) | (22) | (31) |
Depletion, depreciation and amortization | (308) | (257) | (509) |
Asset retirement obligation accretion | (28) | (29) | (27) |
Petroleum revenue tax | 88 | 12 | 78 |
Income tax | (105) | (76) | 42 |
Results of operations | 157 | 114 | (63) |
Oil And Gas | Offshore Africa |  |  |  |
Supplementary Oil & Gas Information [Line Items] |  |  |  |
Crude oil and natural gas revenue, net of royalties, blending and feedstock costs | 676 | 647 | 578 |
Production | (109) | (208) | (226) |
Transportation | (2) | (2) | (1) |
Depletion, depreciation and amortization | (242) | (201) | (205) |
Asset retirement obligation accretion | (6) | (9) | (9) |
Petroleum revenue tax | 0 | 0 | 0 |
Income tax | (79) | (51) | (28) |
Results of operations | $ 238 | $ 176 | $ 109 |
[1] | In connection with adoption of IFRS 15 on January 1, 2018, the Company has reclassified certain comparative amounts in a manner consistent with the presentation adopted for the year ended December 31, 2018.

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