$OXY
OCCIDENTAL PETROLEUM CORP /DE/ Stock $oxy

$oxy Overview Financials Valuation SEC Filings Company Website

2019 Form 10-K Financial Statement

#000079746820000004 Filed on February 28, 2020

Income Statement

Concept	2019	2018 Q4	2018
Revenue	$20.91B	$4.570B	$17.82B
YoY Change	17.32%	29.24%	42.5%
Cost Of Revenue	$2.791B	$1.954B	$2.833B
YoY Change	-1.48%	47.47%	-3.57%
Gross Profit	$18.12B	$2.616B	$14.99B
YoY Change	20.87%	18.32%	56.65%
Gross Profit Margin	86.65%	57.24%	84.11%
Selling, General & Admin	$893.0M	$579.0M	$585.0M
YoY Change	52.65%	7.62%	-66.28%
% of Gross Profit	4.93%	22.13%	3.9%
Research & Development	$247.0M	$50.00M	$110.0M
YoY Change	124.55%	-9.09%	34.15%
% of Gross Profit	1.36%	1.91%	0.73%
Depreciation & Amortization	$6.140B	$1.086B	$3.977B
YoY Change	54.39%	0.93%	-0.62%
% of Gross Profit	33.89%	41.51%	26.53%
Operating Expenses	$893.0M	$1.715B	$585.0M
YoY Change	52.65%	2.76%	-89.95%
Operating Profit	$17.23B	$901.0M	$14.41B
YoY Change	19.58%	66.24%	284.06%
Interest Expense	$162.0M	$133.0M	$774.0M
YoY Change	-79.07%	-480.0%	180.43%
% of Operating Profit	0.94%	14.76%	5.37%
Other Income/Expense, Net	$606.0M		$331.0M
YoY Change	83.08%		-7.28%
Pretax Income	$354.0M	$729.0M	$5.608B
YoY Change	-93.69%	-5307.14%	322.29%
Income Tax	$861.0M	$151.0M	$1.477B
% Of Pretax Income	243.22%	20.71%	26.34%
Net Earnings	-$985.0M	$706.0M	$4.131B
YoY Change	-123.84%	42.05%	215.1%
Net Earnings / Revenue	-4.71%	15.45%	23.18%
Basic Earnings Per Share	-$1.22		$5.40
Diluted Earnings Per Share	-$1.22	$934.1K	$5.39
COMMON SHARES
Basic Shares Outstanding	809.5M shares		761.7M shares
Diluted Shares Outstanding	809.5M shares		763.3M shares

Balance Sheet

Concept	2019	2018 Q4	2018
SHORT-TERM ASSETS
Cash & Short-Term Investments	$3.032B	$3.033B	$3.033B
YoY Change	-0.03%	81.4%	81.4%
Cash & Equivalents	$3.032B	$3.033B	$3.033B
Short-Term Investments
Other Short-Term Assets	$5.787B	$746.0M	$746.0M
YoY Change	675.74%	1.77%	-38.19%
Inventory	$1.581B	$1.260B	$1.260B
Prepaid Expenses
Receivables	$4.233B	$4.900B	$4.893B
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$14.63B	$9.932B	$9.932B
YoY Change	47.33%	20.1%	20.1%
LONG-TERM ASSETS
Property, Plant & Equipment	$83.64B	$31.44B	$31.44B
YoY Change	166.06%	0.84%	0.84%
Goodwill
YoY Change
Intangibles		$8.000M
YoY Change
Long-Term Investments	$6.389B	$1.680B	$1.680B
YoY Change	280.3%	10.89%	10.89%
Other Assets	$54.00M	$8.000M	$8.000M
YoY Change	575.0%	300.0%	300.0%
Total Long-Term Assets	$92.56B	$32.23B	$33.92B
YoY Change	172.85%	-4.53%	0.49%
TOTAL ASSETS
Total Short-Term Assets	$14.63B	$9.932B	$9.932B
Total Long-Term Assets	$92.56B	$32.23B	$33.92B
Total Assets	$107.2B	$42.16B	$43.85B
YoY Change	144.42%	0.32%	4.35%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$4.910B	$4.885B	$4.885B
YoY Change	0.51%	10.82%	10.82%
Accrued Expenses	$5.142B	$2.411B	$2.343B
YoY Change	119.46%	-3.25%	4.18%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$51.00M	$116.0M	$116.0M
YoY Change	-56.03%	-76.8%	-76.8%
Total Short-Term Liabilities	$12.71B	$7.412B	$7.412B
YoY Change	71.41%	0.16%	0.16%
LONG-TERM LIABILITIES
Long-Term Debt	$38.54B	$10.20B	$10.20B
YoY Change	277.78%	9.36%	9.36%
Other Long-Term Liabilities	$12.00B	$1.009B	$4.004B
YoY Change	199.68%	-13.83%	-3.4%
Total Long-Term Liabilities	$50.54B	$11.21B	$14.21B
YoY Change	255.76%	6.77%	5.43%
TOTAL LIABILITIES
Total Short-Term Liabilities	$12.71B	$7.412B	$7.412B
Total Long-Term Liabilities	$50.54B	$11.21B	$14.21B
Total Liabilities	$72.96B	$18.62B	$22.52B
YoY Change	223.91%	4.04%	4.99%
SHAREHOLDERS EQUITY
Retained Earnings		$23.75B
YoY Change		8.27%
Common Stock		$8.225B
YoY Change		2.01%
Preferred Stock
YoY Change
Treasury Stock (at cost)		$10.47B
YoY Change		14.23%
Treasury Stock Shares		145.7M shares
Shareholders Equity	$34.23B	$21.33B	$21.33B
YoY Change
Total Liabilities & Shareholders Equity	$107.2B	$43.85B	$43.85B
YoY Change	144.42%	4.35%	4.35%

Cashflow Statement

Concept	2019	2018 Q4	2018
OPERATING ACTIVITIES
Net Income	-$985.0M	$706.0M	$4.131B
YoY Change	-123.84%	42.05%	215.1%
Depreciation, Depletion And Amortization	$6.140B	$1.086B	$3.977B
YoY Change	54.39%	0.93%	-0.62%
Cash From Operating Activities	$7.375B	$2.500B	$7.669B
YoY Change	-3.83%	75.93%	57.77%
INVESTING ACTIVITIES
Capital Expenditures	$6.367B	-$1.337B	$4.975B
YoY Change	27.98%	15.26%	38.23%
Acquisitions
YoY Change
Other Investing Activities	-$22.67B	-$169.0M	$182.0M
YoY Change	-12557.14%	-181.64%	-408.47%
Cash From Investing Activities	-$29.03B	-$1.506B	-$3.206B
YoY Change	805.4%	58.03%	4.12%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	-$9.791B		$1.215B
YoY Change	-905.84%		-40600.0%
Debt Paid & Issued, Net			$500.0M
YoY Change
Cash From Financing Activities	$22.19B	-915.0M	-$3.102B
YoY Change	-815.44%	51.99%	32.39%
NET CHANGE
Cash From Operating Activities	$7.375B	2.500B	$7.669B
Cash From Investing Activities	-$29.03B	-1.506B	-$3.206B
Cash From Financing Activities	$22.19B	-915.0M	-$3.102B
Net Change In Cash	$541.0M	79.00M	$1.361B
YoY Change	-60.25%	-158.96%	-342.6%
FREE CASH FLOW
Cash From Operating Activities	$7.375B	$2.500B	$7.669B
Capital Expenditures	$6.367B	-$1.337B	$4.975B
Free Cash Flow	$1.008B	$3.837B	$2.694B
YoY Change	-62.58%	48.66%	113.47%

Facts In Submission

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CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	5277000000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	971000000	USD
CY2019	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	233000000	USD
CY2018	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	0	USD
CY2017	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	0	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	373000000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	331000000	USD
CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	357000000	USD
CY2019	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	606000000	USD
CY2018	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	331000000	USD
CY2017	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	357000000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	186000000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	5608000000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1328000000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	693000000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1477000000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	17000000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-507000000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	4131000000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	1311000000	USD
CY2019	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-15000000	USD
CY2018	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	0	USD
CY2017	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	0	USD
CY2019	us-gaap	Profit Loss ProfitLoss	-522000000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	4131000000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	1311000000	USD
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	145000000	USD
CY2018	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	0	USD
CY2017	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	0	USD
CY2019	us-gaap	Redeemable Preferred Stock Dividends RedeemablePreferredStockDividends	318000000	USD
CY2018	us-gaap	Redeemable Preferred Stock Dividends RedeemablePreferredStockDividends	0	USD
CY2017	us-gaap	Redeemable Preferred Stock Dividends RedeemablePreferredStockDividends	0	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-985000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	4131000000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	1311000000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-1.20
CY2018	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	5.40
CY2017	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.71
CY2019	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Basic Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare	-0.02
CY2018	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Basic Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare	0
CY2017	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Basic Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare	0
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.22
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.40
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.71
CY2019	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-1.20
CY2018	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	5.39
CY2017	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.70
CY2019	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Diluted Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare	-0.02
CY2018	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Diluted Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare	0
CY2017	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Diluted Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare	0
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.22
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.39
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.70
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	3.14
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	3.10
CY2017	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	3.06
CY2019	us-gaap	Profit Loss ProfitLoss	-522000000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	4131000000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	1311000000	USD
CY2019	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	0	USD
CY2018	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	0	USD
CY2017	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	3000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-129000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-6000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	13000000	USD
CY2019	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	78000000	USD
CY2018	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	137000000	USD
CY2017	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-7000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-2000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-13000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	1000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-49000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	144000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	8000000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-571000000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	4275000000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	1319000000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	145000000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	0	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	0	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-716000000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	4275000000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1319000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	36000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	2000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	-7000000	USD
CY2019	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	-25000000	USD
CY2018	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	-38000000	USD
CY2017	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	4000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	0	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	-4000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	0	USD
CY2016Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	21497000000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	1311000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	8000000	USD
CY2017	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	2357000000	USD
CY2017	oxy	Issuance Of Common Stock And Other Net IssuanceOfCommonStockAndOtherNet	138000000	USD
CY2017	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	25000000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	20572000000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	4131000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	144000000	USD
CY2018	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	2374000000	USD
CY2018	oxy	Issuance Of Common Stock And Other Net IssuanceOfCommonStockAndOtherNet	162000000	USD
CY2018	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	1305000000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	21330000000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	-522000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-49000000	USD
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	2585000000	USD
CY2019	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	318000000	USD
CY2019	oxy	Issuance Of Common Stock And Other Net IssuanceOfCommonStockAndOtherNet	6939000000	USD
CY2019	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	9762000000	USD
CY2019	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	180000000	USD
CY2019	us-gaap	Noncontrolling Interest Increase From Business Combination NoncontrollingInterestIncreaseFromBusinessCombination	4895000000	USD
CY2019	us-gaap	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	131000000	USD
CY2019	us-gaap	Noncontrolling Interest Decrease From Deconsolidation NoncontrollingInterestDecreaseFromDeconsolidation	4909000000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	34232000000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	-522000000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	4131000000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	1311000000	USD
CY2019	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	-15000000	USD
CY2018	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	0	USD
CY2017	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	0	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	5981000000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	3977000000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	4002000000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1027000000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-719000000	USD
CY2019	us-gaap	Other Noncash Expense OtherNoncashExpense	940000000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	371000000	USD
CY2018	us-gaap	Other Noncash Expense OtherNoncashExpense	34000000	USD
CY2017	us-gaap	Other Noncash Expense OtherNoncashExpense	219000000	USD
CY2019	oxy	Non Cash Portion Of Asset Impairment And Related Items NonCashPortionOfAssetImpairmentAndRelatedItems	1328000000	USD
CY2018	oxy	Non Cash Portion Of Asset Impairment And Related Items NonCashPortionOfAssetImpairmentAndRelatedItems	561000000	USD
CY2017	oxy	Non Cash Portion Of Asset Impairment And Related Items NonCashPortionOfAssetImpairmentAndRelatedItems	545000000	USD
CY2019	oxy	Gainson Saleof Equity Investmentsand Other Assets GainsonSaleofEquityInvestmentsandOtherAssets	622000000	USD
CY2018	oxy	Gainson Saleof Equity Investmentsand Other Assets GainsonSaleofEquityInvestmentsandOtherAssets	974000000	USD
CY2017	oxy	Gainson Saleof Equity Investmentsand Other Assets GainsonSaleofEquityInvestmentsandOtherAssets	667000000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	50000000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	43000000	USD
CY2017	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	68000000	USD
CY2019	us-gaap	Exploration Abandonment And Impairment Expense ExplorationAbandonmentAndImpairmentExpense	89000000	USD
CY2018	us-gaap	Exploration Abandonment And Impairment Expense ExplorationAbandonmentAndImpairmentExpense	56000000	USD
CY2017	us-gaap	Exploration Abandonment And Impairment Expense ExplorationAbandonmentAndImpairmentExpense	51000000	USD
CY2019	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	44000000	USD
CY2018	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	740000000	USD
CY2017	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	158000000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-77000000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	108000000	USD
CY2017	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	349000000	USD
CY2019	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-186000000	USD
CY2018	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-94000000	USD
CY2017	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-39000000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	793000000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	195000000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-89000000	USD
CY2019	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	59000000	USD
CY2018	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	38000000	USD
CY2017	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	64000000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	0	USD
CY2018	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-77000000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-680000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	7203000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	7669000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	4861000000	USD
CY2019	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	172000000	USD
CY2018	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	0	USD
CY2017	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	0	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	7375000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	7669000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	4861000000	USD
CY2018	us-gaap	Cash Provided By Used In Financing Activities Discontinued Operations CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations	0	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	6355000000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	4975000000	USD
CY2018	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	9000000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3599000000	USD
CY2019	oxy	Increase Decreasein Capital Accrual IncreaseDecreaseinCapitalAccrual	-282000000	USD
CY2018	oxy	Increase Decreasein Capital Accrual IncreaseDecreaseinCapitalAccrual	55000000	USD
CY2017	oxy	Increase Decreasein Capital Accrual IncreaseDecreaseinCapitalAccrual	122000000	USD
CY2019	oxy	Payments For Purchases Of Assets And Businesses PaymentsForPurchasesOfAssetsAndBusinesses	28088000000	USD
CY2018	oxy	Payments For Purchases Of Assets And Businesses PaymentsForPurchasesOfAssetsAndBusinesses	928000000	USD
CY2017	oxy	Payments For Purchases Of Assets And Businesses PaymentsForPurchasesOfAssetsAndBusinesses	1064000000	USD
CY2019	oxy	Proceedsfrom Saleof Assetsand Equity Investments Net ProceedsfromSaleofAssetsandEquityInvestmentsNet	6143000000	USD
CY2018	oxy	Proceedsfrom Saleof Assetsand Equity Investments Net ProceedsfromSaleofAssetsandEquityInvestmentsNet	2824000000	USD
CY2017	oxy	Proceedsfrom Saleof Assetsand Equity Investments Net ProceedsfromSaleofAssetsandEquityInvestmentsNet	1403000000	USD
CY2019	oxy	Paymentsfor Proceedsfrom Equity Investmentsand Other Net PaymentsforProceedsfromEquityInvestmentsandOtherNet	291000000	USD
CY2018	oxy	Paymentsfor Proceedsfrom Equity Investmentsand Other Net PaymentsforProceedsfromEquityInvestmentsandOtherNet	182000000	USD
CY2017	oxy	Paymentsfor Proceedsfrom Equity Investmentsand Other Net PaymentsforProceedsfromEquityInvestmentsandOtherNet	-59000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-28873000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-3206000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-3079000000	USD
CY2019	us-gaap	Cash Provided By Used In Investing Activities Discontinued Operations CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations	-154000000	USD
CY2018	us-gaap	Cash Provided By Used In Investing Activities Discontinued Operations CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations	0	USD
CY2017	us-gaap	Cash Provided By Used In Investing Activities Discontinued Operations CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations	0	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-29027000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-3206000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-3079000000	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	21557000000	USD
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	978000000	USD
CY2017	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	10028000000	USD
CY2018	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	33000000	USD
CY2017	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	28000000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	237000000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1248000000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	25000000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	2624000000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	2374000000	USD
CY2017	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	2346000000	USD
CY2019	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	257000000	USD
CY2018	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	0	USD
CY2017	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	0	USD
CY2019	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	229000000	USD
CY2017	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	0	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	22196000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-3102000000	USD
CY2017	us-gaap	Cash Provided By Used In Financing Activities Discontinued Operations CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations	0	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	22193000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-3102000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-2343000000	USD
CY2019	us-gaap	Cash Provided By Used In Financing Activities Discontinued Operations CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations	-3000000	USD
CY2018	oxy	Capitalized Exploratory Well Cost Purchase Allocation CapitalizedExploratoryWellCostPurchaseAllocation	0	USD
CY2017	oxy	Capitalized Exploratory Well Cost Purchase Allocation CapitalizedExploratoryWellCostPurchaseAllocation	0	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-2343000000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	541000000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	1361000000	USD
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-561000000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	3033000000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1672000000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2233000000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	3574000000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	3033000000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1672000000	USD
CY2019	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	3	segment
CY2019	us-gaap	Capitalized Exploratory Well Cost Additions Pending Determination Of Proved Reserves CapitalizedExploratoryWellCostAdditionsPendingDeterminationOfProvedReserves	383000000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	3032000000	USD
CY2019Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	480000000	USD
CY2019Q4	oxy	Disposal Group Including Discontinued Operations Cash And Restricted Cash DisposalGroupIncludingDiscontinuedOperationsCashAndRestrictedCash	8000000	USD
CY2019Q4	us-gaap	Restricted Cash Equivalents Noncurrent RestrictedCashEquivalentsNoncurrent	54000000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	3574000000	USD
CY2019Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	6400000000	USD
CY2018Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	4900000000	USD
CY2018Q4	us-gaap	Capitalized Exploratory Well Costs CapitalizedExploratoryWellCosts	112000000	USD
CY2017Q4	us-gaap	Capitalized Exploratory Well Costs CapitalizedExploratoryWellCosts	108000000	USD
CY2016Q4	us-gaap	Capitalized Exploratory Well Costs CapitalizedExploratoryWellCosts	56000000	USD
CY2019	oxy	Capitalized Exploratory Well Cost Purchase Allocation CapitalizedExploratoryWellCostPurchaseAllocation	231000000	USD
CY2018	us-gaap	Capitalized Exploratory Well Cost Additions Pending Determination Of Proved Reserves CapitalizedExploratoryWellCostAdditionsPendingDeterminationOfProvedReserves	220000000	USD
CY2017	us-gaap	Capitalized Exploratory Well Cost Additions Pending Determination Of Proved Reserves CapitalizedExploratoryWellCostAdditionsPendingDeterminationOfProvedReserves	201000000	USD
CY2019	us-gaap	Reclassification To Well Facilities And Equipment Based On Determination Of Proved Reserves ReclassificationToWellFacilitiesAndEquipmentBasedOnDeterminationOfProvedReserves	230000000	USD
CY2018	us-gaap	Reclassification To Well Facilities And Equipment Based On Determination Of Proved Reserves ReclassificationToWellFacilitiesAndEquipmentBasedOnDeterminationOfProvedReserves	198000000	USD
CY2017	us-gaap	Reclassification To Well Facilities And Equipment Based On Determination Of Proved Reserves ReclassificationToWellFacilitiesAndEquipmentBasedOnDeterminationOfProvedReserves	128000000	USD
CY2019	us-gaap	Capitalized Exploratory Well Cost Charged To Expense1 CapitalizedExploratoryWellCostChargedToExpense1	72000000	USD
CY2018	us-gaap	Capitalized Exploratory Well Cost Charged To Expense1 CapitalizedExploratoryWellCostChargedToExpense1	18000000	USD
CY2017	us-gaap	Capitalized Exploratory Well Cost Charged To Expense1 CapitalizedExploratoryWellCostChargedToExpense1	21000000	USD
CY2019Q4	us-gaap	Capitalized Exploratory Well Costs CapitalizedExploratoryWellCosts	424000000	USD
CY2018Q4	us-gaap	Capitalized Exploratory Well Costs CapitalizedExploratoryWellCosts	112000000	USD
CY2017Q4	us-gaap	Capitalized Exploratory Well Costs CapitalizedExploratoryWellCosts	108000000	USD
CY2019Q4	us-gaap	Capitalized Costs Mineral Interests In Unproved Properties CapitalizedCostsMineralInterestsInUnprovedProperties	29500000000	USD
CY2018Q4	us-gaap	Capitalized Costs Mineral Interests In Unproved Properties CapitalizedCostsMineralInterestsInUnprovedProperties	1000000000.0	USD
CY2019	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	4600000000	USD
CY2019	us-gaap	Asset Impairment Charges AssetImpairmentCharges	285000000	USD
CY2019Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	1200000000	USD
CY2018Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	428000000	USD
CY2019Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	884000000	USD
CY2018Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	600000000	USD
CY2019Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	641000000	USD
CY2018Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	134000000	USD
CY2019	oxy	Estimated Period Often Taken For Investigations And Cleanup Measures For Comprehensive Environmental Response Compensation And Liability Act National Priorities List Sites Greater Than EstimatedPeriodOftenTakenForInvestigationsAndCleanupMeasuresForComprehensiveEnvironmentalResponseCompensationAndLiabilityActNationalPrioritiesListSitesGreaterThan	P10Y
CY2018Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	1499000000	USD
CY2017Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	1312000000	USD
CY2019	oxy	Asset Retirement Obligation Liabilities Assumedin Business Combination AssetRetirementObligationLiabilitiesAssumedinBusinessCombination	3344000000	USD
CY2018	oxy	Asset Retirement Obligation Liabilities Assumedin Business Combination AssetRetirementObligationLiabilitiesAssumedinBusinessCombination	0	USD
CY2019	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	131000000	USD
CY2018	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	31000000	USD
CY2019	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	200000000	USD
CY2018	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	40000000	USD
CY2019	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	71000000	USD
CY2018	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	67000000	USD
CY2019	oxy	Asset Retirement Obligation Acquisitions And Other AssetRetirementObligationAcquisitionsAndOther	0	USD
CY2018	oxy	Asset Retirement Obligation Acquisitions And Other AssetRetirementObligationAcquisitionsAndOther	-18000000	USD
CY2019	oxy	Asset Retirement Obligation Variable Interest Entity Lossof Control AssetRetirementObligationVariableInterestEntityLossofControl	359000000	USD
CY2018	oxy	Asset Retirement Obligation Variable Interest Entity Lossof Control AssetRetirementObligationVariableInterestEntityLossofControl	0	USD
CY2019	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	147000000	USD
CY2018	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	147000000	USD
CY2019Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	4633000000	USD
CY2018Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	1499000000	USD
CY2019Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	248000000	USD
CY2018Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	75000000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	911000000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	383000000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	351000000	USD
CY2019	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	85000000	USD
CY2018	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	46000000	USD
CY2017	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	52000000	USD
CY2019Q3	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	17000000	USD
CY2019Q3	oxy	Operatingand Finance Lease Liability Payments Due Next Twelve Months OperatingandFinanceLeaseLiabilityPaymentsDueNextTwelveMonths	189000000	USD
CY2019Q4	us-gaap	Proceeds From Sale Of Real Estate ProceedsFromSaleOfRealEstate	565000000	USD
CY2018Q4	us-gaap	Lifo Inventory Amount LIFOInventoryAmount	169000000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	64000000	USD
CY2019Q3	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	16000000	USD
CY2019Q3	oxy	Operatingand Finance Lease Liability Payments Due Year Two OperatingandFinanceLeaseLiabilityPaymentsDueYearTwo	80000000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	42000000	USD
CY2019Q3	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	13000000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	18674000000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	15560000000	USD
CY2019	oxy	All Other Revenues AllOtherRevenues	1719000000	USD
CY2018	oxy	All Other Revenues AllOtherRevenues	2264000000	USD
CY2019	us-gaap	Revenues Revenues	20393000000	USD
CY2018	us-gaap	Revenues Revenues	17824000000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	18674000000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	15560000000	USD
CY2019Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	103000000	USD
CY2019Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	103000000	USD
CY2019Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	7000000	USD
CY2019Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	7000000	USD
CY2019Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	7000000	USD
CY2019Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	53000000	USD
CY2019Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	280000000	USD
CY2019Q4	us-gaap	Lifo Inventory Amount LIFOInventoryAmount	168000000	USD
CY2019Q4	us-gaap	Inventory Raw Materials InventoryRawMaterials	75000000	USD
CY2018Q4	us-gaap	Inventory Raw Materials InventoryRawMaterials	74000000	USD
CY2019Q4	us-gaap	Other Inventory Supplies OtherInventorySupplies	879000000	USD
CY2018Q4	us-gaap	Other Inventory Supplies OtherInventorySupplies	445000000	USD
CY2019Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	533000000	USD
CY2018Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	788000000	USD
CY2019Q4	us-gaap	Inventory Gross InventoryGross	1487000000	USD
CY2018Q4	us-gaap	Inventory Gross InventoryGross	1307000000	USD
CY2019Q4	us-gaap	Inventory Lifo Reserve InventoryLIFOReserve	40000000	USD
CY2018Q4	us-gaap	Inventory Lifo Reserve InventoryLIFOReserve	47000000	USD
CY2019Q4	us-gaap	Inventory Net InventoryNet	1447000000	USD
CY2018Q4	us-gaap	Inventory Net InventoryNet	1260000000	USD
CY2018Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	10407000000	USD
CY2018Q4	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	-36000000	USD
CY2018Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	54000000	USD
CY2018Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	116000000	USD
CY2018Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	10201000000	USD
CY2019Q4	oxy	Variable Rate Debt As Percentage Of Long Term Debt Gross VariableRateDebtAsPercentageOfLongTermDebtGross	0.12
CY2018Q4	oxy	Variable Rate Debt As Percentage Of Long Term Debt Gross VariableRateDebtAsPercentageOfLongTermDebtGross	0.01
CY2019Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	37400000000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	6400000000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	4700000000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	1200000000	USD
CY2019Q4	oxy	Longterm Debt Maturities Repaymentsof Principalin Year Fiveand Thereafter LongtermDebtMaturitiesRepaymentsofPrincipalinYearFiveandThereafter	25100000000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	90000000	USD
CY2019Q3	us-gaap	Finance Lease Liability Payments Remainder Of Fiscal Year FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear	7000000	USD
CY2019Q3	oxy	Operatingand Finance Lease Liability Payments Remainderof Fiscal Year OperatingandFinanceLeaseLiabilityPaymentsRemainderofFiscalYear	97000000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	172000000	USD
CY2019Q3	oxy	Operatingand Finance Lease Liability Payments Due Year Three OperatingandFinanceLeaseLiabilityPaymentsDueYearThree	55000000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	28000000	USD
CY2019Q3	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	8000000	USD
CY2019Q3	oxy	Operatingand Finance Lease Liability Payments Due Year Four OperatingandFinanceLeaseLiabilityPaymentsDueYearFour	36000000	USD
CY2019Q3	oxy	Lessee Operating Lease Liability Payments Dueafter Year Four LesseeOperatingLeaseLiabilityPaymentsDueafterYearFour	136000000	USD
CY2019Q3	oxy	Finance Lease Liability Payments Dueafter Year Four FinanceLeaseLiabilityPaymentsDueafterYearFour	43000000	USD
CY2019Q3	oxy	Operatingand Finance Lease Liability Payments Dueafter Year Four OperatingandFinanceLeaseLiabilityPaymentsDueafterYearFour	179000000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	532000000	USD
CY2019Q3	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	104000000	USD
CY2019Q3	oxy	Operatingand Finance Lease Liability Payments Due OperatingandFinanceLeaseLiabilityPaymentsDue	636000000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	44000000	USD
CY2019Q3	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	18000000	USD
CY2019Q3	oxy	Operatingand Finance Lease Liability Undiscounted Excess Amount OperatingandFinanceLeaseLiabilityUndiscountedExcessAmount	62000000	USD
CY2019Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	488000000	USD
CY2019Q3	us-gaap	Finance Lease Liability FinanceLeaseLiability	86000000	USD
CY2019Q3	oxy	Operatingand Finance Lease Liability OperatingandFinanceLeaseLiability	574000000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	1385000000	USD
CY2019Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	397000000	USD
CY2019Q4	oxy	Lease Rightof Use Asset LeaseRightofUseAsset	1782000000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	569000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	51000000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	854000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	347000000	USD
CY2019Q4	oxy	Lease Liability LeaseLiability	1821000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	555000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	53000000	USD
CY2019Q4	oxy	Operatingand Finance Lease Liability Payments Due Next Twelve Months OperatingandFinanceLeaseLiabilityPaymentsDueNextTwelveMonths	608000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	408000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	45000000	USD
CY2019Q4	oxy	Operatingand Finance Lease Liability Payments Due Year Two OperatingandFinanceLeaseLiabilityPaymentsDueYearTwo	453000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	136000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	41000000	USD
CY2019Q4	oxy	Operatingand Finance Lease Liability Payments Due Year Three OperatingandFinanceLeaseLiabilityPaymentsDueYearThree	177000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	99000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	37000000	USD
CY2019Q4	oxy	Operatingand Finance Lease Liability Payments Due Year Four OperatingandFinanceLeaseLiabilityPaymentsDueYearFour	136000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	81000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	34000000	USD
CY2019Q4	oxy	Operatingand Finance Lease Liability Payments Due Year Five OperatingandFinanceLeaseLiabilityPaymentsDueYearFive	115000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	254000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	275000000	USD
CY2019Q4	oxy	Operatingand Finance Lease Liability Payments Dueafter Year Five OperatingandFinanceLeaseLiabilityPaymentsDueafterYearFive	529000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	1533000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	485000000	USD
CY2019Q4	oxy	Operatingand Finance Lease Liability Payments Due OperatingandFinanceLeaseLiabilityPaymentsDue	2018000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	110000000	USD
CY2019Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	87000000	USD
CY2019Q4	oxy	Operatingand Finance Lease Liability Undiscounted Excess Amount OperatingandFinanceLeaseLiabilityUndiscountedExcessAmount	197000000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	1423000000	USD
CY2019Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	398000000	USD
CY2019Q4	oxy	Operatingand Finance Lease Liability OperatingandFinanceLeaseLiability	1821000000	USD
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P4Y7M6D
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0253
CY2019Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P11Y7M6D
CY2019Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0374
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	186000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	147000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	96000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	68000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	49000000	USD
CY2018Q4	us-gaap	Accrued Environmental Loss Contingencies Noncurrent AccruedEnvironmentalLossContingenciesNoncurrent	762000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	158000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	704000000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	449000000	USD
CY2019	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	19000000	USD
CY2019	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	2000000	USD
CY2019	us-gaap	Lease Cost LeaseCost	953000000	USD
CY2019	us-gaap	Short Term Lease Cost ShortTermLeaseCost	404000000	USD
CY2019	us-gaap	Variable Lease Cost VariableLeaseCost	162000000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	262000000	USD
CY2019	us-gaap	Operating Lease Payments Use OperatingLeasePaymentsUse	112000000	USD
CY2019	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	19000000	USD
CY2019Q4	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	104000000	USD
CY2019Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	65000000	USD
CY2018Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	54000000	USD
CY2019Q4	oxy	Environmental Remediation Sites Number EnvironmentalRemediationSitesNumber	177	site
CY2019Q4	us-gaap	Accrued Environmental Loss Contingencies Current AccruedEnvironmentalLossContingenciesCurrent	162000000	USD
CY2018Q4	us-gaap	Accrued Environmental Loss Contingencies Current AccruedEnvironmentalLossContingenciesCurrent	120000000	USD
CY2019Q4	us-gaap	Accrued Environmental Loss Contingencies Noncurrent AccruedEnvironmentalLossContingenciesNoncurrent	1040000000.00	USD
CY2019Q4	oxy	Environmental Remediation Sites Number EnvironmentalRemediationSitesNumber	177	site
CY2019Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	1197000000	USD
CY2018Q4	oxy	Environmental Remediation Sites Number EnvironmentalRemediationSitesNumber	145	site
CY2018Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	882000000	USD
CY2019Q4	oxy	Environmental Reserves Exceeding Ten Million Threshold Value Site Category EnvironmentalReservesExceedingTenMillionThresholdValueSiteCategory	10000000	USD
CY2019Q4	oxy	Environmental Reserves Exceeding Ten Million Site Category Number Of Sites EnvironmentalReservesExceedingTenMillionSiteCategoryNumberOfSites	20	site
CY2019Q4	oxy	Environmental Remediation Sites Number EnvironmentalRemediationSitesNumber	177	site
CY2019Q4	oxy	Environmental Reserves Range Between Zero To One Million Site Category Number Of Sites EnvironmentalReservesRangeBetweenZeroToOneMillionSiteCategoryNumberOfSites	101	site
CY2019	us-gaap	Environmental Remediation Expense EnvironmentalRemediationExpense	112000000	USD
CY2018	us-gaap	Environmental Remediation Expense EnvironmentalRemediationExpense	47000000	USD
CY2017	us-gaap	Environmental Remediation Expense EnvironmentalRemediationExpense	39000000	USD
CY2019	oxy	Percent Of Environmental Reserves To Be Funded In Three To Four Years PercentOfEnvironmentalReservesToBeFundedInThreeToFourYears	0.40
CY2019	oxy	Minimum Period Of Expending Second Half Of Environmental Reserves MinimumPeriodOfExpendingSecondHalfOfEnvironmentalReserves	P10Y
CY2019Q4	oxy	Environmental Remediation Possible Additional Loss Beyond Accruals EnvironmentalRemediationPossibleAdditionalLossBeyondAccruals	1100000000	USD
CY2019Q2	oxy	Loss Contingency Common Stock Accumulated LossContingencyCommonStockAccumulated	1600000000	USD
CY2019Q4	oxy	Loss Contingency Potential Income Tax Expense Benefit LossContingencyPotentialIncomeTaxExpenseBenefit	925000000	USD
CY2019Q4	us-gaap	Purchase Obligation PurchaseObligation	20700000000	USD
CY2019Q4	us-gaap	Purchase Obligation Due In Next Twelve Months PurchaseObligationDueInNextTwelveMonths	3300000000	USD
CY2019Q4	us-gaap	Purchase Obligation Due In Second And Third Year PurchaseObligationDueInSecondAndThirdYear	5700000000	USD
CY2019Q4	us-gaap	Purchase Obligation Due In Fourth And Fifth Year PurchaseObligationDueInFourthAndFifthYear	4700000000	USD
CY2019Q4	oxy	Purchase Obligation Duein Fifth Yearand Thereafter PurchaseObligationDueinFifthYearandThereafter	7100000000	USD
CY2019	oxy	Income Loss From Continuing Operations Before Income Taxes After Income Loss From Equity Method Investments Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesAfterIncomeLossFromEquityMethodInvestmentsDomestic	-1632000000	USD
CY2018	oxy	Income Loss From Continuing Operations Before Income Taxes After Income Loss From Equity Method Investments Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesAfterIncomeLossFromEquityMethodInvestmentsDomestic	3431000000	USD
CY2017	oxy	Income Loss From Continuing Operations Before Income Taxes After Income Loss From Equity Method Investments Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesAfterIncomeLossFromEquityMethodInvestmentsDomestic	-609000000	USD
CY2019	oxy	Income Loss From Continuing Operations Before Income Taxes After Income Loss From Equity Method Investments Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesAfterIncomeLossFromEquityMethodInvestmentsForeign	1818000000	USD
CY2018	oxy	Income Loss From Continuing Operations Before Income Taxes After Income Loss From Equity Method Investments Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesAfterIncomeLossFromEquityMethodInvestmentsForeign	2177000000	USD
CY2017	oxy	Income Loss From Continuing Operations Before Income Taxes After Income Loss From Equity Method Investments Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesAfterIncomeLossFromEquityMethodInvestmentsForeign	1937000000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	186000000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	5608000000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1328000000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	33000000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-23000000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-81000000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	46000000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	52000000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	11000000	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	1641000000	USD
CY2018	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	1077000000	USD
CY2017	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	806000000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1720000000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1106000000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	736000000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-130000000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	422000000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-856000000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	17000000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	12000000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	23000000	USD
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-914000000	USD
CY2018	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-63000000	USD
CY2017	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	114000000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1027000000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	371000000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-719000000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	693000000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1477000000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	17000000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2019	oxy	Effective Income Tax Rate Reconciliation Enhanced Oil Recovery Credit EffectiveIncomeTaxRateReconciliationEnhancedOilRecoveryCredit	-0.04
CY2018	oxy	Effective Income Tax Rate Reconciliation Enhanced Oil Recovery Credit EffectiveIncomeTaxRateReconciliationEnhancedOilRecoveryCredit	-0.03
CY2017	oxy	Effective Income Tax Rate Reconciliation Enhanced Oil Recovery Credit EffectiveIncomeTaxRateReconciliationEnhancedOilRecoveryCredit	-0.09
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	-0.44
CY2019	oxy	Effective Income Tax Rate Reconciliation Due To Reversal Of Indefinite Reinvestment Assertion Percent EffectiveIncomeTaxRateReconciliationDueToReversalOfIndefiniteReinvestmentAssertionPercent	0
CY2018	oxy	Effective Income Tax Rate Reconciliation Due To Reversal Of Indefinite Reinvestment Assertion Percent EffectiveIncomeTaxRateReconciliationDueToReversalOfIndefiniteReinvestmentAssertionPercent	-0.02
CY2017	oxy	Effective Income Tax Rate Reconciliation Due To Reversal Of Indefinite Reinvestment Assertion Percent EffectiveIncomeTaxRateReconciliationDueToReversalOfIndefiniteReinvestmentAssertionPercent	0.07
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	1.87
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.11
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.12
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.28
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.01
CY2017	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.02
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies EffectiveIncomeTaxRateReconciliationTaxContingencies	0.13
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies EffectiveIncomeTaxRateReconciliationTaxContingencies	0
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies EffectiveIncomeTaxRateReconciliationTaxContingencies	0
CY2019	oxy	Effective Income Tax Rate Reconciliation Business Acquisition Transaction Costs Percent EffectiveIncomeTaxRateReconciliationBusinessAcquisitionTransactionCostsPercent	0.19
CY2018	oxy	Effective Income Tax Rate Reconciliation Business Acquisition Transaction Costs Percent EffectiveIncomeTaxRateReconciliationBusinessAcquisitionTransactionCostsPercent	0
CY2017	oxy	Effective Income Tax Rate Reconciliation Business Acquisition Transaction Costs Percent EffectiveIncomeTaxRateReconciliationBusinessAcquisitionTransactionCostsPercent	0
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Minority Interest Income Expense EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense	-0.16
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Minority Interest Income Expense EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense	0
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Minority Interest Income Expense EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense	0
CY2019	oxy	Effective Income Tax Rate Reconciliation Executive Compensation Limitation Percent EffectiveIncomeTaxRateReconciliationExecutiveCompensationLimitationPercent	0.24
CY2018	oxy	Effective Income Tax Rate Reconciliation Executive Compensation Limitation Percent EffectiveIncomeTaxRateReconciliationExecutiveCompensationLimitationPercent	0
CY2017	oxy	Effective Income Tax Rate Reconciliation Executive Compensation Limitation Percent EffectiveIncomeTaxRateReconciliationExecutiveCompensationLimitationPercent	0
CY2019	oxy	Effective Income Tax Rate Reconciliation Stock Warrants Percent EffectiveIncomeTaxRateReconciliationStockWarrantsPercent	-0.09
CY2018	oxy	Effective Income Tax Rate Reconciliation Stock Warrants Percent EffectiveIncomeTaxRateReconciliationStockWarrantsPercent	0
CY2017	oxy	Effective Income Tax Rate Reconciliation Stock Warrants Percent EffectiveIncomeTaxRateReconciliationStockWarrantsPercent	0
CY2019	oxy	Effective Income Tax Rate Reconciliation Lossof Controlin Equity Method Investment Percent EffectiveIncomeTaxRateReconciliationLossofControlinEquityMethodInvestmentPercent	1.13
CY2018	oxy	Effective Income Tax Rate Reconciliation Lossof Controlin Equity Method Investment Percent EffectiveIncomeTaxRateReconciliationLossofControlinEquityMethodInvestmentPercent	0
CY2017	oxy	Effective Income Tax Rate Reconciliation Lossof Controlin Equity Method Investment Percent EffectiveIncomeTaxRateReconciliationLossofControlinEquityMethodInvestmentPercent	0
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.03
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.02
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.02
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	3.73
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.26
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.01
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	3.73
CY2019Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	12375000000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	2089000000	USD
CY2019Q4	oxy	Deferred Tax Liabilities Equity Investments Partnerships And Foreign Subsidiaries DeferredTaxLiabilitiesEquityInvestmentsPartnershipsAndForeignSubsidiaries	989000000	USD
CY2018Q4	oxy	Deferred Tax Liabilities Equity Investments Partnerships And Foreign Subsidiaries DeferredTaxLiabilitiesEquityInvestmentsPartnershipsAndForeignSubsidiaries	161000000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	13364000000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	2250000000	USD
CY2019Q4	oxy	Deferred Tax Assets Environmental Reserves DeferredTaxAssetsEnvironmentalReserves	261000000	USD
CY2018Q4	oxy	Deferred Tax Assets Environmental Reserves DeferredTaxAssetsEnvironmentalReserves	195000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Postretirement Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits	441000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Postretirement Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits	176000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	266000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	170000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Asset Retirement Obligations DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAssetRetirementObligations	906000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Asset Retirement Obligations DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAssetRetirementObligations	280000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Foreign DeferredTaxAssetsTaxCreditCarryforwardsForeign	4379000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Foreign DeferredTaxAssetsTaxCreditCarryforwardsForeign	2356000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards General Business DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness	443000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards General Business DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness	429000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	692000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	29000000	USD
CY2019Q4	us-gaap	Deferred Tax Asset Interest Carryforward DeferredTaxAssetInterestCarryforward	492000000	USD
CY2018Q4	us-gaap	Deferred Tax Asset Interest Carryforward DeferredTaxAssetInterestCarryforward	0	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	782000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	111000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	8662000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	3746000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	4959000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	2403000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	3703000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	1343000000	USD
CY2019Q4	oxy	Deferred Tax Asset Foreign Longterm Receivablesand Noncurrent Assets Net DeferredTaxAssetForeignLongtermReceivablesandNoncurrentAssetsNet	-56000000	USD
CY2018Q4	oxy	Deferred Tax Asset Foreign Longterm Receivablesand Noncurrent Assets Net DeferredTaxAssetForeignLongtermReceivablesandNoncurrentAssetsNet	0	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	9717000000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	907000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	3700000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	1300000000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	13400000000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	2300000000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Undistributed Foreign Earnings DeferredTaxLiabilitiesUndistributedForeignEarnings	889000000	USD
CY2019Q4	oxy	Deferred Tax Liabilities Undistributed Foreign Earnings Additional Amount Required DeferredTaxLiabilitiesUndistributedForeignEarningsAdditionalAmountRequired	206000000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	22000000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	22000000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Acquisition UnrecognizedTaxBenefitsIncreasesResultingFromAcquisition	2143000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Acquisition UnrecognizedTaxBenefitsIncreasesResultingFromAcquisition	0	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Acquisition UnrecognizedTaxBenefitsIncreasesResultingFromAcquisition	0	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	30000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	0	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	0	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	22000000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2173000000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	22000000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2200000000	USD
CY2019Q4	oxy	Unrecognized Tax Benefits Potential Benefit UnrecognizedTaxBenefitsPotentialBenefit	2000000000.0	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	1700000000	USD
CY2019Q4	us-gaap	Significant Change In Unrecognized Tax Benefits Is Reasonably Possible Amount Of Unrecorded Benefit SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit	131000000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	199000000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Expense UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense	30000000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	0	USD
CY2016Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	892215000	shares
CY2017	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	1252000	shares
CY2017	oxy	Stock Issued During Period Shares Stock Options Exercised And Other StockIssuedDuringPeriodSharesStockOptionsExercisedAndOther	2000	shares
CY2017Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	893469000	shares
CY2018	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	1628000	shares
CY2018	oxy	Stock Issued During Period Shares Stock Options Exercised And Other StockIssuedDuringPeriodSharesStockOptionsExercisedAndOther	19000	shares
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	895116000	shares
CY2019	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	3188000	shares
CY2019	us-gaap	Stock Issued During Period Shares Acquisitions StockIssuedDuringPeriodSharesAcquisitions	146131000	shares
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	1044435000	shares
CY2019Q4	us-gaap	Stock Repurchase Program Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased	185000000	shares
CY2019Q4	us-gaap	Stock Repurchase Program Remaining Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased	44200000	shares
CY2019	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	2700000	shares
CY2019	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	66.94
CY2018	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	16900000	shares
CY2018	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	74.92
CY2017	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	0	shares
CY2019Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	150300000	shares
CY2018Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	145700000	shares
CY2017Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	128400000	shares
CY2019Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	50000000	shares
CY2019Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	1.00
CY2019Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	100000	shares
CY2019	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-507000000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	4131000000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	1311000000	USD
CY2019	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-15000000	USD
CY2018	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	0	USD
CY2017	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	0	USD
CY2019	us-gaap	Profit Loss ProfitLoss	-522000000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	4131000000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	1311000000	USD
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	145000000	USD
CY2018	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	0	USD
CY2017	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	0	USD
CY2019	us-gaap	Redeemable Preferred Stock Dividends RedeemablePreferredStockDividends	318000000	USD
CY2018	us-gaap	Redeemable Preferred Stock Dividends RedeemablePreferredStockDividends	0	USD
CY2017	us-gaap	Redeemable Preferred Stock Dividends RedeemablePreferredStockDividends	0	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-985000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	4131000000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	1311000000	USD
CY2019	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	0	USD
CY2018	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	17000000	USD
CY2017	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	6000000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-985000000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	4114000000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1305000000	USD
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	809500000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	761700000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	765100000	shares
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.22
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.40
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.71
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-985000000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	4114000000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1305000000	USD
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	809500000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	761700000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	765100000	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1600000	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	800000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	809500000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	763300000	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	765900000	shares
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.22
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.39
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.70
CY2019Q4	oxy	Supplemental Retirement Plan Supplemental Retirement Plan Accrued Liabilities SupplementalRetirementPlanSupplementalRetirementPlanAccruedLiabilities	279000000	USD
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	80000000	shares
CY2019Q4	oxy	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Awarded ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAwarded	6600000	shares
CY2019	oxy	Stock Issued During Period Number Of Shares Counted Against Issued Share Based Compensation StockIssuedDuringPeriodNumberOfSharesCountedAgainstIssuedShareBasedCompensation	3	shares
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	208000000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	180000000	USD
CY2017	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	150000000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	43000000	USD
CY2018	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	47000000	USD
CY2017	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	32000000	USD
CY2019Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	354100000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P1Y10M24D
CY2018Q3	us-gaap	Defined Benefit Plan Plan Amendments DefinedBenefitPlanPlanAmendments	-178000000	USD
CY2019	us-gaap	Equity Method Investment Summarized Financial Information Revenue EquityMethodInvestmentSummarizedFinancialInformationRevenue	26520000000	USD
CY2018Q4	oxy	Supplemental Retirement Plan Supplemental Retirement Plan Accrued Liabilities SupplementalRetirementPlanSupplementalRetirementPlanAccruedLiabilities	201000000	USD
CY2019	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	211000000	USD
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	152000000	USD
CY2017	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	130000000	USD
CY2019	us-gaap	Other Postretirement Benefit Expense OtherPostretirementBenefitExpense	220000000	USD
CY2018	us-gaap	Other Postretirement Benefit Expense OtherPostretirementBenefitExpense	182000000	USD
CY2017	us-gaap	Other Postretirement Benefit Expense OtherPostretirementBenefitExpense	181000000	USD
CY2018	us-gaap	Equity Method Investment Summarized Financial Information Revenue EquityMethodInvestmentSummarizedFinancialInformationRevenue	28091000000	USD
CY2019Q4	us-gaap	Equity Method Investments EquityMethodInvestments	6400000000	USD
CY2018Q4	us-gaap	Equity Method Investments EquityMethodInvestments	1700000000	USD
CY2019Q4	us-gaap	Equity Method Investments EquityMethodInvestments	6389000000	USD
CY2019	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	422000000	USD
CY2018	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	329000000	USD
CY2017	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	297000000	USD
CY2019Q4	us-gaap	Equity Method Investment Difference Between Carrying Amount And Underlying Equity EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity	3600000000	USD
CY2019Q4	oxy	Equity Method Investment Difference Between Carrying Amountand Underlying Equity Relatedto Goodwill EquityMethodInvestmentDifferenceBetweenCarryingAmountandUnderlyingEquityRelatedtoGoodwill	1500000000	USD
CY2017	us-gaap	Equity Method Investment Summarized Financial Information Revenue EquityMethodInvestmentSummarizedFinancialInformationRevenue	13843000000	USD
CY2019	us-gaap	Equity Method Investment Summarized Financial Information Cost Of Sales EquityMethodInvestmentSummarizedFinancialInformationCostOfSales	24084000000	USD
CY2018	us-gaap	Equity Method Investment Summarized Financial Information Cost Of Sales EquityMethodInvestmentSummarizedFinancialInformationCostOfSales	25029000000	USD
CY2017	us-gaap	Equity Method Investment Summarized Financial Information Cost Of Sales EquityMethodInvestmentSummarizedFinancialInformationCostOfSales	12230000000	USD
CY2019	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	2436000000	USD
CY2018	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	3062000000	USD
CY2017	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	1613000000	USD
CY2019Q4	us-gaap	Equity Method Investment Summarized Financial Information Current Assets EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets	1130000000	USD
CY2018Q4	us-gaap	Equity Method Investment Summarized Financial Information Current Assets EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets	5587000000	USD
CY2017Q4	us-gaap	Equity Method Investment Summarized Financial Information Current Assets EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets	5754000000	USD
CY2019Q4	us-gaap	Equity Method Investment Summarized Financial Information Noncurrent Assets EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets	21158000000	USD
CY2018Q4	us-gaap	Equity Method Investment Summarized Financial Information Noncurrent Assets EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets	25871000000	USD
CY2017Q4	us-gaap	Equity Method Investment Summarized Financial Information Noncurrent Assets EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets	25108000000	USD
CY2019Q4	us-gaap	Equity Method Investment Summarized Financial Information Current Liabilities EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities	785000000	USD
CY2018Q4	us-gaap	Equity Method Investment Summarized Financial Information Current Liabilities EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities	4879000000	USD
CY2017Q4	us-gaap	Equity Method Investment Summarized Financial Information Current Liabilities EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities	4479000000	USD
CY2019Q4	oxy	Equity Method Investment Summarized Financial Information Long Term Debt EquityMethodInvestmentSummarizedFinancialInformationLongTermDebt	8673000000	USD
CY2018Q4	oxy	Equity Method Investment Summarized Financial Information Long Term Debt EquityMethodInvestmentSummarizedFinancialInformationLongTermDebt	12505000000	USD
CY2017Q4	oxy	Equity Method Investment Summarized Financial Information Long Term Debt EquityMethodInvestmentSummarizedFinancialInformationLongTermDebt	14091000000	USD
CY2019Q4	oxy	Equity Method Investment Summarized Financial Information Noncurrent Liabilities Other Than Long Term Debt EquityMethodInvestmentSummarizedFinancialInformationNoncurrentLiabilitiesOtherThanLongTermDebt	859000000	USD
CY2018Q4	oxy	Equity Method Investment Summarized Financial Information Noncurrent Liabilities Other Than Long Term Debt EquityMethodInvestmentSummarizedFinancialInformationNoncurrentLiabilitiesOtherThanLongTermDebt	95000000	USD
CY2017Q4	oxy	Equity Method Investment Summarized Financial Information Noncurrent Liabilities Other Than Long Term Debt EquityMethodInvestmentSummarizedFinancialInformationNoncurrentLiabilitiesOtherThanLongTermDebt	414000000	USD
CY2019Q4	us-gaap	Equity Method Investment Summarized Financial Information Equity Or Capital EquityMethodInvestmentSummarizedFinancialInformationEquityOrCapital	11971000000	USD
CY2018Q4	us-gaap	Equity Method Investment Summarized Financial Information Equity Or Capital EquityMethodInvestmentSummarizedFinancialInformationEquityOrCapital	13979000000	USD
CY2017Q4	us-gaap	Due From Related Parties DueFromRelatedParties	63000000	USD
CY2019Q4	us-gaap	Due To Related Parties Current And Noncurrent DueToRelatedPartiesCurrentAndNoncurrent	463000000	USD
CY2018Q4	us-gaap	Due To Related Parties Current And Noncurrent DueToRelatedPartiesCurrentAndNoncurrent	46000000	USD
CY2017Q4	us-gaap	Equity Method Investment Summarized Financial Information Equity Or Capital EquityMethodInvestmentSummarizedFinancialInformationEquityOrCapital	11878000000	USD
CY2019	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	691000000	USD
CY2018	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	805000000	USD
CY2017	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	636000000	USD
CY2019	us-gaap	Related Party Transaction Purchases From Related Party RelatedPartyTransactionPurchasesFromRelatedParty	463000000	USD
CY2018	us-gaap	Related Party Transaction Purchases From Related Party RelatedPartyTransactionPurchasesFromRelatedParty	502000000	USD
CY2017	us-gaap	Related Party Transaction Purchases From Related Party RelatedPartyTransactionPurchasesFromRelatedParty	387000000	USD
CY2019	us-gaap	Related Party Transaction Amounts Of Transaction RelatedPartyTransactionAmountsOfTransaction	28000000	USD
CY2018	us-gaap	Related Party Transaction Amounts Of Transaction RelatedPartyTransactionAmountsOfTransaction	52000000	USD
CY2017	us-gaap	Related Party Transaction Amounts Of Transaction RelatedPartyTransactionAmountsOfTransaction	38000000	USD
CY2019Q4	us-gaap	Due From Related Parties DueFromRelatedParties	133000000	USD
CY2018Q4	us-gaap	Due From Related Parties DueFromRelatedParties	63000000	USD
CY2017Q4	us-gaap	Due To Related Parties Current And Noncurrent DueToRelatedPartiesCurrentAndNoncurrent	45000000	USD
CY2019	oxy	Pretax Impairmentand Related Charges Domestic Undeveloped Leases PretaxImpairmentandRelatedChargesDomesticUndevelopedLeases	285000000	USD
CY2019	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	3	segment
CY2019	us-gaap	Revenues Revenues	20393000000	USD
CY2019	oxy	Income Loss From Continuing Operations Before Income Taxes After Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesAfterIncomeLossFromEquityMethodInvestments	186000000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	693000000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-507000000	USD
CY2019Q4	us-gaap	Equity Method Investments EquityMethodInvestments	6389000000	USD
CY2019	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	6441000000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	5981000000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	17000000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	1311000000	USD
CY2017Q4	us-gaap	Equity Method Investments EquityMethodInvestments	1515000000	USD
CY2017	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	3651000000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	4002000000	USD
CY2019Q4	us-gaap	Assets Assets	109330000000	USD
CY2018	us-gaap	Revenues Revenues	17824000000	USD
CY2017Q4	us-gaap	Assets Assets	42026000000	USD
CY2019	us-gaap	Severance Costs1 SeveranceCosts1	1000000000.0	USD
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CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1477000000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	4131000000	USD
CY2018Q4	us-gaap	Equity Method Investments EquityMethodInvestments	1680000000	USD
CY2018	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	5020000000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	3977000000	USD
CY2018Q4	us-gaap	Assets Assets	43854000000	USD
CY2017	us-gaap	Revenues Revenues	12508000000	USD
CY2017	oxy	Income Loss From Continuing Operations Before Income Taxes After Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesAfterIncomeLossFromEquityMethodInvestments	1328000000	USD
CY2019	oxy	Business Acquisition Crucial Seismic Data Costs BusinessAcquisitionCrucialSeismicDataCosts	401000000	USD
CY2019Q4	us-gaap	Business Acquisition Cost Of Acquired Entity Transaction Costs BusinessAcquisitionCostOfAcquiredEntityTransactionCosts	213000000	USD
CY2019	oxy	Pre Tax Adjustments Tax Effect PreTaxAdjustmentsTaxEffect	-245000000	USD
CY2018	oxy	Pre Tax Adjustments Tax Effect PreTaxAdjustmentsTaxEffect	198000000	USD
CY2017	oxy	Pre Tax Adjustments Tax Effect PreTaxAdjustmentsTaxEffect	-392000000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	80469000000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	31437000000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	31174000000	USD

Files In Submission

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$OXY
OCCIDENTAL PETROLEUM CORP /DE/ Stock $oxy

2019 Form 10-K Financial Statement

#000079746820000004 Filed on February 28, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$OXY OCCIDENTAL PETROLEUM CORP /DE/ Stock $oxy

2019 Form 10-K Financial Statement

#000079746820000004 Filed on February 28, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$OXY
OCCIDENTAL PETROLEUM CORP /DE/ Stock $oxy