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Information Relating to the Consolidated Statement of Cash Flows - Narrative (Details) - USD ($) $ in Billions	Dec. 31, 2019	Dec. 31, 2018
Upstream | Operating Segments
Segment Reporting Information [Line Items]
Non cash transaction in operating segments	$ 9.3	$ 1.1

X

- Definition

Non cash increase transaction in operating segments

+ References

No definition available.

+ Details

Name:	cvx_Noncashincreasetransactioninoperatingsegments
Namespace Prefix:	cvx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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

Name:	us-gaap_SegmentReportingInformationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=us-gaap_UpstreamEquipmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: