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Lease Commitments - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($)
Leases [Abstract]
Future undiscounted cash flows for operating leases not yet commenced	$ 907

X

- Definition

Lessee, Cash Flows for Operating Lease, Lease Not yet Commenced

+ References

No definition available.

+ Details

Name:	cvx_LesseeCashFlowsforOperatingLeaseLeaseNotyetCommenced
Namespace Prefix:	cvx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- References

No definition available.

+ Details

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