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Litigation And Other Contingencies (Schedule Of Guarantees) (Details) $ in Millions	Sep. 30, 2017 USD ($)
Litigation And Other Contingencies [Line Items]
Guarantees	$ 7,158
Equity Company Obligations [Member]
Litigation And Other Contingencies [Line Items]
Guarantees	2,861	[1]
Other Third Party Obligations [Member]
Litigation And Other Contingencies [Line Items]
Guarantees	4,297
Debt Related Guarantees [Member]
Litigation And Other Contingencies [Line Items]
Guarantees	137
Debt Related Guarantees [Member] | Equity Company Obligations [Member]
Litigation And Other Contingencies [Line Items]
Guarantees	107	[1]
Debt Related Guarantees [Member] | Other Third Party Obligations [Member]
Litigation And Other Contingencies [Line Items]
Guarantees	30
Other Guarantees [Member]
Litigation And Other Contingencies [Line Items]
Guarantees	7,021
Other Guarantees [Member] | Equity Company Obligations [Member]
Litigation And Other Contingencies [Line Items]
Guarantees	2,754	[1]
Other Guarantees [Member] | Other Third Party Obligations [Member]
Litigation And Other Contingencies [Line Items]
Guarantees	$ 4,267
[1] ExxonMobil share

X

- Definition

The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=82913245&loc=d3e12069-110248

+ Details

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X

- 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.

+ Details

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