XML 82 R58.htm IDEA: XBRL DOCUMENT
v3.22.4

LONG-TERM DEBT - DEBT ACTIVITY (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Debt Instrument [Line Items] |  |  |
Debt instrument issued | $ 17,958 | $ 28,493 | $ 35,235
Variable rate bonds due 2021 |  |  |
Debt Instrument [Line Items] |  |  |
Repayments of debt |  | (27) |
Senior notes |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument issued | $ 18,000 | 28,500 |
Senior notes | 2.600% senior notes due 2022 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage | 2.60% |  |
Repayments of debt | $ (101) |  |
Senior notes | 2.700% senior notes due 2023 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage | 2.70% |  |
Repayments of debt | $ (442) |  |
Senior notes | 6.950% senior notes due 2024 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage | 6.95% |  |
Repayments of debt | $ (359) |  |
Senior notes | 3.450% senior notes due 2024 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage | 3.45% |  |
Repayments of debt | $ (16) |  |
Senior notes | 2.900% senior notes due 2024 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage | 2.90% |  |
Repayments of debt | $ (295) |  |
Senior notes | 3.500% senior notes due 2025 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage | 3.50% |  |
Repayments of debt | $ (189) |  |
Senior notes | 8.000% senior notes due 2025 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage | 8.00% |  |
Repayments of debt | $ (500) |  |
Senior notes | 5.875% senior notes due 2025 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage | 5.875% |  |
Repayments of debt | $ (294) |  |
Senior notes | 5.500% senior notes due 2025 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage | 5.50% |  |
Repayments of debt | $ (285) |  |
Senior notes | 5.550% senior notes due 2026 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage | 5.55% |  |
Repayments of debt | $ (230) |  |
Senior notes | 3.200% senior notes due 2026 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage | 3.20% |  |
Repayments of debt | $ (615) |  |
Senior notes | 3.400% senior notes due 2026 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage | 3.40% |  |
Repayments of debt | $ (495) |  |
Senior notes | 3.000% senior notes due 2027 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage | 3.00% |  |
Repayments of debt | $ (418) |  |
Senior notes | 8.500% senior notes due 2027 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage | 8.50% |  |
Repayments of debt | $ (11) |  |
Senior notes | 6.375% senior notes due 2028 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage | 6.375% |  |
Repayments of debt | $ (22) |  |
Senior notes | 3.500% senior notes due 2029 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage | 3.50% |  |
Repayments of debt | $ (1,191) |  |
Senior notes | 6.625% senior notes due 2030 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage | 6.625% |  |
Repayments of debt | $ (51) |  |
Senior notes | 6.125% senior notes due 2031 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage | 6.125% |  |
Repayments of debt | $ (107) |  |
Senior notes | 6.450% senior notes due 2036 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage | 6.45% |  |
Repayments of debt | $ (23) |  |
Senior notes | Zero Coupon senior notes due 2036 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument issued | 673 |  |
Repayments of debt | $ (1,596) |  |
Senior notes | 4.300% senior notes due 2039 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage | 4.30% |  |
Repayments of debt | $ (446) |  |
Senior notes | 6.200% senior notes due 2040 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage | 6.20% |  |
Repayments of debt | $ (13) |  |
Senior notes | 4.500% senior notes due 2044 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage | 4.50% |  |
Repayments of debt | $ (417) |  |
Senior notes | 4.625% senior notes due 2045 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage | 4.625% |  |
Repayments of debt | $ (338) |  |
Senior notes | 6.600% senior notes due 2046 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage | 6.60% |  |
Repayments of debt | $ (40) |  |
Debt activity |  | $ 57 |
Senior notes | 4.400% senior notes due 2046 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage | 4.40% |  |
Repayments of debt | $ (552) |  |
Senior notes | 4.100% senior notes due 2047 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage | 4.10% |  |
Repayments of debt | $ (405) |  |
Senior notes | 4.200% senior notes due 2048 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage | 4.20% |  |
Repayments of debt | $ (657) |  |
Senior notes | 4.400% senior notes due 2049 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage | 4.40% |  |
Repayments of debt | $ (424) |  |
Senior notes | 4.850% senior notes due 2021 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage |  | 4.85% |
Repayments of debt |  | $ (147) |
Senior notes | 2.600% senior notes due 2021 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage |  | 2.60% |
Repayments of debt |  | $ (224) |
Senior notes | 3.125% senior notes due 2022 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage |  | 3.125% |
Repayments of debt |  | $ (276) |
Senior notes | 2.700% senior notes due 2022 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage |  | 2.70% |
Repayments of debt |  | $ (629) |
Senior notes | Floating interest rate notes due August 2022 |  |  |
Debt Instrument [Line Items] |  |  |
Repayments of debt |  | $ (1,052) |
Senior notes | 2.700% senior notes due 2023 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage |  | 2.70% |
Repayments of debt |  | $ (484) |
Senior notes | 3.450% senior notes due 2024 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage |  | 3.45% |
Repayments of debt |  | $ (121) |
Senior notes | 2.900% senior notes due 2024 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage |  | 2.90% |
Repayments of debt |  | $ (2,051) |
Senior notes | 3.500% senior notes due 2025 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage |  | 3.50% |
Repayments of debt |  | $ (424) |
Senior notes | 3.400% senior notes due 2026 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage |  | 3.40% |
Repayments of debt |  | $ (371) |
Senior notes | 3.200% senior notes due 2026 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage |  | 3.20% |
Repayments of debt |  | $ (203) |
Senior notes | 3.000% senior notes due 2027 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage |  | 3.00% |
Repayments of debt |  | $ (116) |
Senior notes | 3.500% senior notes due 2029 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage |  | 3.50% |
Repayments of debt |  | $ (23) |
Senior notes | 4.300% senior notes due 2039 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage |  | 4.30% |
Repayments of debt |  | $ (57) |
Senior notes | 4.500% senior notes due 2044 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage |  | 4.50% |
Repayments of debt |  | $ (17) |
Senior notes | 4.625% senior notes due 2045 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage |  | 4.625% |
Repayments of debt |  | $ (116) |
Senior notes | 4.400% senior notes due 2046 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage |  | 4.40% |
Repayments of debt |  | $ (224) |
Senior notes | 4.100% senior notes due 2047 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage |  | 4.10% |
Repayments of debt |  | $ (87) |
Senior notes | 4.200% senior notes due 2048 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage |  | 4.20% |
Repayments of debt |  | $ (39) |
Senior notes | 4.400% senior notes due 2049 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage |  | 4.40% |
Repayments of debt |  | $ (46) |
Senior notes | 7.730% debentures due 2096 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage |  | 7.73% |
Repayments of debt |  | $ (3) |
Senior notes | 7.500% debentures due 2026 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage |  | 7.50% |
Repayments of debt |  | $ (18) |
Senior notes | 7.250% debentures due 2096 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage |  | 7.25% |
Repayments of debt |  | $ (44) |
Debentures | 7.150% debentures due 2028 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage | 7.15% |  |
Repayments of debt | $ (3) |  |
Debentures | 7.730% debentures due 2096 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage | 7.73% | 7.73% |
Debentures | 7.500% debentures due 2026 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage | 7.50% | 7.50% |
Debentures | 7.250% debentures due 2096 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument interest rate stated percentage | 7.25% | 7.25% |

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=124435984&loc=d3e28551-108399 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124429444&loc=SL124452920-239629 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69C -URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69B -URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
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_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash inflow from a borrowing with the highest claim on the assets of the entity in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle, if longer). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585 + Details
Name: | us-gaap_RepaymentsOfDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_VariableRateBondsDue2021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotes2.600PercentDue2022Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotes2.700PercentDue2023Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotes6.950PercentDue2024Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotes3.450PercentDue2024Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotes2.900PercentDue2024Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotes3.500PercentDue2025Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotes8000PercentDue2025Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotes5875PercentDue2025Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotes5500PercentDue2025Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotes5550PercentDue2026Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotes3.200PercentDue2026Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotes3.400PercentDue2026Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotes3.000PercentDue2027Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotes8500PercentDue2027Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotes6375PercentDue2028Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotes3.500PercentDue2029Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotes6625PercentDue2030Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotes6125PercentDue2031Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotes6.450PercentDue2036Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_ZeroCouponSeniorNotesDue2036Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotes4.300PercentDue2039Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotes6.200PercentDue2040Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotes4.500PercentDue2044Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotes4.625PercentDue2045Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotesDue20466600Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotes4.400PercentDue2046Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotes4.100PercentDue2047Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotes4.200PercentDue2048Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotes4.400PercentDue2049Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotesDue20214850Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotesDue20212600Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotesDue20223125Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotesDue2022Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_FloatingInterestRateNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotesDue2023Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotesDue20243450Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotesDue20242900Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotesDue2025Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotesDue20263400Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotesDue20263200Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotesDue20273000Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotesDue20293500Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotesDue20394300Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotesDue20444500Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotesDue20454625Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotesDue20464400NoteOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotesDue20474100Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotesDue20484200Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_SeniorNotesDue20494400NoteOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_Debentures7.730PercentDue2096Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_Debentures7.500PercentDue2026Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_Debentures7.250PercentDue2096Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=oxy_DebenturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=oxy_Debentures7.150PercentDue2028Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |