XML 88 R64.htm IDEA: XBRL DOCUMENT
v3.10.0.1

DERIVATIVES - CASH FLOW HEDGES (Details) - Bcf | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Derivative Instruments and Hedging Activities Disclosure [Abstract] |  |
Natural gas held in storage (in cubic feet) | 5 | 7
Forecast sale of natural gas from storage designated as cash-flow hedges (in cubic feet) | 4 | 7

X
- Definition This element represents the forecast sales volume of natural gas from storage in billion cubic feet designated as cash flow hedges. + References No definition available. + Details
Name: | oxy_DesignatedForecastSaleOfNaturalGasAsCashFlowHedges
Namespace Prefix: | oxy_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of natural gas held in storage, in billion cubic feet. + References No definition available. + Details
Name: | oxy_NaturalGasHeldInStorage
Namespace Prefix: | oxy_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration