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Hedging Activities and Fair Value Measurements, Gains and Losses on Derivative Instruments and Related Hedged Items (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022
Derivatives in fair value hedging relationships [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain (Loss) Recognized in Income on Derivative |  | $ 4 | $ (65)
Gain (Loss) Recognized in Income on Hedged Item |  | (1) | 21
Derivatives in fair value hedging relationships [Member] | Commodity derivatives [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain (Loss) Recognized in Income on Derivative |  | $ 4 | $ (65)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] |  | Revenues | Revenues
Derivatives in fair value hedging relationships [Member] | Commodity derivatives [Member] | Revenue [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain (Loss) Recognized in Income on Hedged Item |  | $ (1) | $ 21
Derivatives in cash flow hedging relationships [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Change in Value Recognized in Other Comprehensive Income (Loss) on Derivative |  | (94) | (99)
Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) to Income |  | 30 | (53)
Derivatives in cash flow hedging relationships [Member] | Interest rate derivatives [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Change in Value Recognized in Other Comprehensive Income (Loss) on Derivative |  | (5) | 0
Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) to Income |  | $ (2) | $ (8)
Derivative Instrument, Gain (Loss) Reclassified from AOCI into Income, Effective Portion, Statement of Income or Comprehensive Income [Extensible Enumeration] |  | Interest expense | Interest expense
Accumulated other comprehensive income related to interest rate derivative instruments expected to be reclassified to earnings in interest expense over the next twelve months |  | $ 9 |
Derivatives in cash flow hedging relationships [Member] | Commodity derivatives [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net accumulated other comprehensive income (loss) related to commodity derivative instruments expected to be reclassified to earnings over the next twelve months |  | 71 |
Accumulated other comprehensive income (loss) related to commodity derivative instruments expected to be reclassified to revenue over the next twelve months |  | 123 |
Accumulated other comprehensive income (loss) related to commodity derivative instruments expected to be reclassified to operating costs and expenses over the next twelve months |  | (52) |
Derivatives in cash flow hedging relationships [Member] | Commodity derivatives [Member] | Revenue [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Change in Value Recognized in Other Comprehensive Income (Loss) on Derivative | [1] | (65) | $ (121)
Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) to Income |  | 24 | (39)
Derivatives in cash flow hedging relationships [Member] | Commodity derivatives [Member] | Operating costs and expenses [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Change in Value Recognized in Other Comprehensive Income (Loss) on Derivative | [1] | (24) | 22
Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) to Income |  | 8 | (6)
Derivatives not designated as hedging instruments [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain (Loss) Recognized in Income on Derivative |  | 200 | 47
Derivatives not designated as hedging instruments [Member] | Commodity derivatives [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Realized gains |  | 202 |
Unrealized gains (losses) |  | (2) |
Derivatives not designated as hedging instruments [Member] | Commodity derivatives [Member] | Revenue [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain (Loss) Recognized in Income on Derivative |  | 200 | 43
Derivatives not designated as hedging instruments [Member] | Commodity derivatives [Member] | Operating costs and expenses [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain (Loss) Recognized in Income on Derivative |  | $ 0 | $ 4
[1] | The fair value of these derivative instruments will be reclassified to their respective locations on the Unaudited Condensed Statement of Consolidated Operations when the forecasted transactions affect earnings.

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- Definition The estimated net amount of unrealized gains or losses on price risk cash flow hedges as of the balance sheet date expected to be reclassified to earnings (operating costs and expenses) within the next twelve months. + References No definition available. + Details
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- Definition The estimated net amount of unrealized gains or losses on price risk cash flow hedges as of the balance sheet date expected to be reclassified to earnings (revenue) within the next twelve months. + References No definition available. + Details
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- Definition The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of settled agreements for the purchase or sale of mineral resources, energy, and agricultural products that was included in earnings for the period. + References No definition available. + Details
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- Definition Amount of the increase (decrease) in fair value of the hedged item in a fair value hedge recognized in the income statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=121577467&loc=d3e76258-113986 + Details
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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5618551-113959 + Details
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- Definition Indicates line item in statement of income or comprehensive income that includes gain (loss) from effective portion of derivative instrument reclassified from accumulated other comprehensive income (AOCI) into income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4D -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624177-113959 + Details
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- Definition The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4D -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624177-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624171-113959 + Details
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- Definition The estimated net amount of unrealized gains or losses on interest rate cash flow hedges as of the balance sheet date expected to be reclassified to earnings within the next twelve months. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=121549185&loc=d3e80748-113994 + Details
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