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v3.20.2

Fair Value Measurement - FV of Financial Instruments (Details) - USD ($) $ in Millions | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Carrying Amount [Member] |  |
Financial Assets [Abstract] |  |
Investment in Cenovus Energy | $ 809 | $ 2,111
Investments in debt securities | 482 | 241
Total loans and advances - related parties | 219 | 339
Financial Liabilities [Abstract] |  |
Total debt, excluding capital leases | 14,482 | 14,175
Carrying Amount [Member] | Commodity Contract [Member] |  |
Financial Assets [Abstract] |  |
Commodity derivatives, assets | 92 | 125
Financial Liabilities [Abstract] |  |
Commodity derivatives, liability | 66 | 106
Investment in Cenovus Energy | 809 | 2,111
Investments in debt securities | 482 | 241
Total loans and advances - related parties | 219 | 339
Total debt, excluding capital leases | 18,827 | 18,108
Commodity Contract [Member] |  |
Financial Assets [Abstract] |  |
Commodity derivatives, assets | 92 | 125
Financial Liabilities [Abstract] |  |
Commodity derivatives, liability | $ 66 | $ 106

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