Operating Segments and Geographic Data (Details 2) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Segment Earnings	$ 4,305	$ 3,409	$ 6,954	$ 7,047
Operating Segments
Segment Reporting Information [Line Items]
Segment Earnings	4,212	4,133	7,587	8,213
Operating Segments \| Upstream
Segment Reporting Information [Line Items]
Segment Earnings	3,483	3,295	6,606	6,647
Operating Segments \| Upstream \| United States
Segment Reporting Information [Line Items]
Segment Earnings	896	838	1,644	1,486
Operating Segments \| Upstream \| International
Segment Reporting Information [Line Items]
Segment Earnings	2,587	2,457	4,962	5,161
Operating Segments \| Downstream
Segment Reporting Information [Line Items]
Segment Earnings	729	838	981	1,566
Operating Segments \| Downstream \| United States
Segment Reporting Information [Line Items]
Segment Earnings	465	657	682	1,099
Operating Segments \| Downstream \| International
Segment Reporting Information [Line Items]
Segment Earnings	264	181	299	467
All Other
Segment Reporting Information [Line Items]
Interest expense	(189)	(204)	(404)	(353)
Interest income	43	27	94	46
Other	$ 239	$ (547)	$ (323)	$ (859)

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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