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This element represents the performance target payout ratios for performance-based awards granted during the reporting period.

No definition available.

Name:	oxy_ShareBasedCompensationByShareBasedPaymentAwardPerformanceTargetPayout
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Data Type:	dtr-types:percentItemType
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Number of shares counted for each share covered by an award (other than Options and SARs) in determining the number of shares that are available for future awards.

No definition available.

Name:	oxy_StockIssuedDuringPeriodNumberOfSharesCountedAgainstIssuedShareBasedCompensation
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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Period Type:	duration

Aggregate cash paid by the entity during the period to settle equity instruments granted under equity-based payment arrangements.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Data Type:	xbrli:durationItemType
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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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Period Type:	duration

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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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.

No definition available.

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Net number of non-option equity instruments granted to participants.

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Number of shares authorized for issuance under share-based payment arrangement.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Data Type:	xbrli:durationItemType
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Number of share options (or share units) exercised during the current period.

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Period Type:	duration

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Namespace Prefix:
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Name:	us-gaap_AwardTypeAxis=us-gaap_CommonStockMember
Namespace Prefix:
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Name:	srt_TitleOfIndividualAxis=srt_DirectorMember
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Namespace Prefix:
Data Type:	na
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Name:	srt_RangeAxis=srt_MinimumMember
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Namespace Prefix:
Data Type:	na
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Namespace Prefix:
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Namespace Prefix:
Data Type:	na
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Data Type:	na
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