Description of the Plan (Details) - EBP 001 - USD ($)	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
EBP, Description of Plan [Line Items]
Non-highly compensated employees, employee contribution percentage limit	30.00%
Highly compensated employees, employee contribution percentage limit		15.00%
First employer matching percentage	200.00%
First percentage of eligible compensation	2.00%
Second employer matching percentage	100.00%
Second percentage of eligible compensation	3.00%
Percentage of eligible compensation	6.00%
Minimum borrowing amount	$ 1,000
Maximum borrowing amount	$ 50,000
Maximum borrowing amount, percentage of total vested account balance	50.00%
Monthly payroll deductions for repayment, percentage of monthly base compensation	25.00%
Loan term, minimum	1 year
Loan term, maximum	5 years
Primary residence loan term, minimum	6 years
Primary residence loan term, maximum	10 years
Minimum
EBP, Description of Plan [Line Items]
Before-tax contribution amount, percent of base pay	5.00%
Employer matching contributions	85.00%
Interest rate	3.00%
Maximum
EBP, Description of Plan [Line Items]
Employer matching contributions	100.00%
Interest rate	11.00%	11.00%

EBP, Employer Contribution, First Matching Percentage

No definition available.

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- Definition

EBP, Employer Contribution, First Participant Compensation Matched, Percentage

+ References

No definition available.

+ Details

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- Definition

EBP, Employer Contribution, Second Matching Percentage

+ References

No definition available.

+ Details

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- Definition

EBP, Employer Contribution, Second Participant Compensation Matched, Percentage

+ References

No definition available.

+ Details

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- Definition

EBP, Highly Compensated Participant Contribution, Pretax, Maximum Annual Compensation To Total Compensation, Percentage

+ References

No definition available.

+ Details

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- Definition

EBP, Not Highly Compensated Participant Contribution, Pretax, Maximum Annual Compensation To Total Compensation, Percentage

+ References

No definition available.

+ Details

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- Definition

EBP, Note Receivable From Participant, Account, Primary Residence, Maximum Borrowing Term

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

EBP, Note Receivable From Participant, Account, Primary Residence, Minimum Borrowing Term

+ References

No definition available.

+ Details

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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Note Receivable From Participant, General Loan, Maximum Borrowing Term

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

EBP, Note Receivable From Participant, General Loan, Minimum Borrowing Term

+ References

No definition available.

+ Details

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Namespace Prefix:	oxy_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Note Receivable From Participant, Monthly Payroll Deduction, Monthly Compensation, Maximum Percentage

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
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- 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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of employer matching contribution on eligible participant contribution to employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478873/962-325-55-17

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of participant compensation eligible for employer matching contribution for participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of maximum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Percentage of maximum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow to total participant account balance.

+ References

+ Details

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Period Type:	instant

- Definition

Amount of minimum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow.

+ References

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Percentage of eligible compensation contributed for participant automatically enrolled in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Interest rate on participant loan in schedule of asset held for investment of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
-Subparagraph (1)(i)(D)
-Publisher DOL-EBSA

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-05(a)(Schedule I))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

+ Details

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Balance Type:	na
Period Type:	duration

- Details

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- Details

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- Details

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