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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS
 12 Months Ended
Dec. 31, 2023
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS
Schedule II – Valuation and Qualifying AccountsOccidental Petroleum Corporation
and Subsidiaries

 Additions   
millionsBalance at Beginning of PeriodCharged to
Costs and
Expenses		Charged to
Other
Accounts
Deductions (a)
Balance at
End of
Period		 
2023      
Allowance for doubtful accounts$904 $(235)$— $(625)$44 
(b)
Environmental, litigation, tax and other reserves$3,712 $328 $50 $(297)$3,793 
(c)
2022 
Allowance for doubtful accounts$867 $37 $— $— $904 
(b)
Environmental, litigation, tax and other reserves$3,164 $714 $138 $(304)$3,712 
(c)
2021 
Allowance for doubtful accounts$822 $56 $(11)$— $867 
(b)
Environmental, litigation, tax and other reserves$2,429 $900 $94 $(259)$3,164 
(c)
(a)Primarily represents payments except for 2023 allowance for doubtful accounts, where Occidental reversed the receivable and allowance related to the Maxus settlement. See Note 13 - Lawsuits, Claims, Commitments and Contingencies
(b)Of these amounts, $43 million, $44 million and $46 million in 2023, 2022, and 2021, respectively, were classified as current.
(c)Of these amounts, $215 million, $266 million and $790 million in 2023, 2022, and 2021, respectively, were classified as current.

Note: The amounts presented represent continuing operations.