Operating Segments and Geographic Data (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017
Segment Reporting Information [Line Items]
Segment Earnings	$ 3,638	$ 2,682
Operating Segments
Segment Reporting Information [Line Items]
Segment Earnings	4,080	2,443
Operating Segments \| Upstream
Segment Reporting Information [Line Items]
Segment Earnings	3,352	1,517
Operating Segments \| Upstream \| United States
Segment Reporting Information [Line Items]
Segment Earnings	648	80
Operating Segments \| Upstream \| International
Segment Reporting Information [Line Items]
Segment Earnings	2,704	1,437
Operating Segments \| Downstream
Segment Reporting Information [Line Items]
Segment Earnings	728	926
Operating Segments \| Downstream \| United States
Segment Reporting Information [Line Items]
Segment Earnings	442	469
Operating Segments \| Downstream \| International
Segment Reporting Information [Line Items]
Segment Earnings	286	457
All Other
Segment Reporting Information [Line Items]
Interest expense	(149)	(43)
Interest income	19	15
Other	$ (312)	$ 267

Segment earnings, other income (expense).

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- Definition

Amount of the cost of borrowed funds accounted for as interest expense.

+ References

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- Definition

Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities.

+ References

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- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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