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Financial Instruments - Narrative (Details) bbl in Millions, MMBbls in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 USD ($) bbl MMBbls | Mar. 31, 2021 USD ($) | Dec. 31, 2021 USD ($) item bbl MMBbls
Derivatives, Fair Value [Line Items] |  |  |  |
Unrealized Gain On Derivative Contracts |  | $ 469,000,000 |  | $ 612,000,000
Investment Segment |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Fair value of derivative instruments with credit risk related contingent features in a liability position |  | 1,000,000 |  | 0
Investment Segment | Not designated as hedging instrument | Other assets [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Unrealized Gain On Derivative Contracts | [1] | 456,000,000 |  | 611,000,000
Energy Segment | Not designated as hedging instrument | Other assets [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative Asset |  | 13,000,000 |  | 1,000,000
Unrealized Gain On Derivative Contracts |  | 0 |  | $ 2,000,000
Energy Segment | Not designated as hedging instrument | Cost of Goods and Service Benchmark [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Gain (loss) on derivatives not designated as hedging instruments recognized in income |  | $ 2,000,000 | $ (32,000,000) |
Maximum |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative volume (barrels) | MMBbls |  | 1 |  |
Forward Contracts [Member] | Energy Segment | Not designated as hedging instrument |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative, Number of Instruments Held | bbl |  | 1 |  | 2
Credit Default Swap [Member] | Energy Segment | Not designated as hedging instrument |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative, Number of Instruments Held |  | 1 |  | 0
Forward Purchase Commitments [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative volume (barrels) | MMBbls |  | 1 |  | 1
Forward Sale Commitments [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative volume (barrels) | MMBbls |  | 1 |  | 1
[1] | Excludes netting of cash collateral received and posted. The total collateral posted at March 31, 2022 and December 31, 2021 was $1,615 million and $1,906 million, respectively, across all counterparties, which are included in cash held at consolidated affiliated partnerships and restricted cash in the condensed consolidated balance sheets.

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