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Financial Instruments - Narrative (Details)
bbl in Millions, $ in Millions

3 Months Ended

6 Months Ended

12 Months Ended

Jun. 30, 2021

USD ($)

bbl

Jun. 30, 2020

USD ($)

Jun. 30, 2021

USD ($)

bbl

Jun. 30, 2020

USD ($)

^[1]

Dec. 31, 2020

USD ($)

bbl

Derivative [Line Items]

Derivative Asset

$ 683

$ 683

$ 785

Investment Segment

Derivative [Line Items]

Fair value derivative instruments with credit risk related contingent features in a liability position

$ 0

$ 0

$ 1

Not designated as hedging instrument | Commodity contracts not considered probable of settlement | Energy Segment

Derivative [Line Items]

Volume of derivatives (barrels) | bbl

2

6

Not designated as hedging instrument | RINs contracts | Energy Segment

Derivative [Line Items]

Number of derivatives | bbl

21

21

13

Not designated as hedging instrument | Credit Default Swap | Energy Segment

Derivative [Line Items]

Number of derivatives

6

6

7

Cost of goods sold | Not designated as hedging instrument | Energy Segment

Derivative [Line Items]

Gain (loss) on derivatives not designated as hedging instruments recognized in income

$ (2)

$ 20

$ (34)

$ 65

Other assets. | Not designated as hedging instrument | Investment Segment

Derivative [Line Items]

Derivative contracts, at fair value

^[2]

679

679

$ 785

Derivative Asset

1,036

1,036

1,016

Other assets. | Not designated as hedging instrument | Energy Segment

Derivative [Line Items]

Derivative contracts, at fair value

26

26

$ 17

Derivative Asset

$ 4

$ 4

[1]	Gains (losses) recognized on derivatives are classified in net gain (loss) from investment activities in our condensed consolidated statements of operations for our Investment segment.
[2]	Excludes netting of cash collateral received and posted. The total collateral posted at June 30, 2021 and December 31, 2020 was $995 million and $872 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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