Operating Segments and Geographic Data (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Information [Line Items]
Segment Earnings	$ 1,952	$ 1,283	$ 6,084	$ (912)
Operating Segments
Segment Reporting Information [Line Items]
Segment Earnings	2,303	1,519	6,794	(389)
Operating Segments \| Upstream
Segment Reporting Information [Line Items]
Segment Earnings	489	454	2,859	(3,467)
Operating Segments \| Upstream \| United States
Segment Reporting Information [Line Items]
Segment Earnings	(26)	(212)	(48)	(2,175)
Operating Segments \| Upstream \| International
Segment Reporting Information [Line Items]
Segment Earnings	515	666	2,907	(1,292)
Operating Segments \| Downstream
Segment Reporting Information [Line Items]
Segment Earnings	1,814	1,065	3,935	3,078
Operating Segments \| Downstream \| United States
Segment Reporting Information [Line Items]
Segment Earnings	640	523	1,743	1,307
Operating Segments \| Downstream \| International
Segment Reporting Information [Line Items]
Segment Earnings	1,174	542	2,192	1,771
All Other
Segment Reporting Information [Line Items]
Interest expense	(30)	(53)	(115)	(120)
Interest income	13	15	42	47
Other	$ (334)	$ (198)	$ (637)	$ (450)

Segment earnings, other income (expense).

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- Definition

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

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- Definition

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

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

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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.

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