XML 57 R46.htm IDEA: XBRL DOCUMENT
v3.21.1

Derivatives - Marketing Derivatives (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2021 $ / bbl | Mar. 31, 2021 $ / MillionCubicFeet | Mar. 31, 2021 MMBbls | Mar. 31, 2021 Bcf | Dec. 31, 2020 $ / bbl | Dec. 31, 2020 $ / MillionCubicFeet | Dec. 31, 2020 MMBbls | Dec. 31, 2020 Bcf
Marketing Derivatives | Not designated as hedging instruments |  |  |  |  |  |  |  |
Outstanding commodity derivatives contracts not designated as hedging instruments |  |  |  |  |  |  |  |
Weighted average sales price (dollars per barrel) | 58.84 | 2.51 |  |  | 46.05 | 2.58 |  |
Crude oil | Short position |  |  |  |  |  |  |  |
Outstanding commodity derivatives contracts not designated as hedging instruments |  |  |  |  |  |  |  |
Outstanding net volumes on derivatives not designated as hedges (mmbls/bcf) | MMBbls |  |  | (28) |  |  |  | (31) |
Natural gas | Short position |  |  |  |  |  |  |  |
Outstanding commodity derivatives contracts not designated as hedging instruments |  |  |  |  |  |  |  |
Outstanding net volumes on derivatives not designated as hedges (mmbls/bcf) | Bcf |  |  |  | (130) |  |  |  | (117)

X
- Definition Sales price per unit of oil and gas produced. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1204 -Paragraph (b) -Subparagraph (1) + Details
Name: | srt_AverageSalesPrices
Namespace Prefix: | srt_
Data Type: | srt-types:perUnitItemType
Balance Type: | na
Period Type: | duration

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_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Nominal volume used to calculate payments on a derivative instrument. + References No definition available. + Details
Name: | us-gaap_DerivativeNonmonetaryNotionalAmountVolume
Namespace Prefix: | us-gaap_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=oxy_MarketingDerivativesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_HedgingDesignationAxis=us-gaap_NondesignatedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=srt_CrudeOilAndNGLPerBarrelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PositionAxis=us-gaap_ShortMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=oxy_NaturalGasPerCubicFootMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |