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Derivatives - Gains and Losses on Derivatives (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gain (loss) on derivative instrument | $ 399 | $ (585)
Collars and Call Options | Net sales |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gain (loss) on derivative instrument | (72) | 952
Marketing Derivatives | Net sales |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gain (loss) on derivative instrument | 180 | 410
Interest Rate Swaps | Gains (losses) on interest rate swaps and warrants, net |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gain (loss) on derivative instrument | 399 | (669)
Other | Gains (losses) on interest rate swaps and warrants, net |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gain (loss) on derivative instrument | $ 0 | $ 84

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- Definition Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959 + Details
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