RECONCILIATION OF FINANCIAL STATEMENTS TO FORM 5500 - Benefits Paid to Participants (Details) $ in Thousands	12 Months Ended
Dec. 31, 2025 USD ($)
BP Employee Savings Plan (Plan No. 001)
EBP, Reconciliation of Financial Statement to Form 5500 [Line Items]
Benefits paid to participants per the financial statements	$ 941,744
Less: Certain deemed distributions of participant loans	(9)
Benefits paid to participants per Form 5500	941,735
BP Partnership Savings Plan (Plan No. 051)
EBP, Reconciliation of Financial Statement to Form 5500 [Line Items]
Benefits paid to participants per the financial statements	5,466
Less: Certain deemed distributions of participant loans	0
Benefits paid to participants per Form 5500	5,466
BP DirectSave Plan (Plan No. 052)
EBP, Reconciliation of Financial Statement to Form 5500 [Line Items]
Benefits paid to participants per the financial statements	6,763
Less: Certain deemed distributions of participant loans	19
Benefits paid to participants per Form 5500	6,782
BPX Energy Employee Savings Plan (Plan No. 100)
EBP, Reconciliation of Financial Statement to Form 5500 [Line Items]
Benefits paid to participants per the financial statements	36,209
Less: Certain deemed distributions of participant loans	0
Benefits paid to participants per Form 5500	36,209
Archaea Employee Savings Plan (Plan No. 101)
EBP, Reconciliation of Financial Statement to Form 5500 [Line Items]
Benefits paid to participants per the financial statements	5,363
Less: Certain deemed distributions of participant loans	0
Benefits paid to participants per Form 5500	$ 5,363

Amount of decrease in net asset available for benefit from payment of benefit to participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), including, but not limited to, withdrawal.

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

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 III))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-04(5)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 50
-Paragraph 2B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477783/962-325-50-2B

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 45
-Paragraph 7
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477063/962-205-45-7

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- Definition

Amount of decrease in net asset available for benefit from benefit payment and payment to provide benefit as reported in Form 5500 caption for employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Includes, but is not limited to, payment to provide benefit directly to participant, direct rollover, and payment to insurance carrier. Form 5500 is form provided by Department of the Treasury, Internal Revenue Service (IRS); Department of Labor (DOL), Employee Benefit Security Administration (EBSA); and Pension Benefit Guaranty Corporation (PBGC).

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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.

+ References

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

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Amount of increase (decrease) in benefit payment from deemed distribution to participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) to reconcile benefit payment per financial statement to Form 5500 caption. Form 5500 is form provided by Department of the Treasury, Internal Revenue Service (IRS); Department of Labor (DOL), Employee Benefit Security Administration (EBSA); and Pension Benefit Guaranty Corporation (PBGC).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 1
-Paragraph b
-Subparagraph (3)
-Publisher DOL-EBSA

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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-SubTopic 205
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

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