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Environmental Liabilities and Expenditures (Details) | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2021 USD ($) mi | Mar. 31, 2016 mi | Sep. 30, 2016 USD ($) | Jun. 30, 2022 USD ($) site | Dec. 31, 2021 USD ($)
Environmental remediation reserves |  |  |  |  |
Number of Sites | site |  |  |  | 167 |
Remediation Balance |  |  |  | $ 155,000,000 |
Environmental remediation reserves, non-current, included in deferred credits and other liabilities - other |  |  |  | 918,000,000 | $ 944,000,000
Remediation Balance |  |  |  | 1,073,000,000 |
Environmental reserves, exceeding $ ten million, threshold value |  |  |  | $ 10,000,000 |
Environmental reserves, exceeding $ ten million, threshold value, number of sites | site |  |  |  | 17 |
Environmental reserves, range between zero to $ one million site category, number of sites | site |  |  |  | 99 |
Percent of reserve to be funded over the next three to four years |  |  |  | 40.00% |
Period of expending remaining environmental reserves (or more) |  |  |  | 10 years |
Environmental remediation additional loss range |  |  |  | $ 1,200,000,000 |
Low end of range |  |  |  |  |
Environmental remediation reserves |  |  |  |  |
Environmental reserves, range between zero to $ one million site category |  |  |  | $ 0 |
Period of expending first half of environmental reserves |  |  |  | 3 years |
High end of range |  |  |  |  |
Environmental remediation reserves |  |  |  |  |
Environmental reserves, range between zero to $ one million site category |  |  |  | $ 1,000,000 |
Period of expending first half of environmental reserves |  |  |  | 4 years |
NPL sites |  |  |  |  |
Environmental remediation reserves |  |  |  |  |
Number of Sites | site |  |  |  | 30 |
Environmental remediation contingency, number of site categories | site |  |  |  | 4 |
Remediation Balance |  |  |  | $ 449,000,000 |
Non-National Priorities List Sites |  |  |  |  |
Environmental remediation reserves |  |  |  |  |
Environmental remediation contingency, number of site categories | site |  |  |  | 3 |
Third-party sites |  |  |  |  |
Environmental remediation reserves |  |  |  |  |
Number of Sites | site |  |  |  | 70 |
Remediation Balance |  |  |  | $ 242,000,000 |
Occidental-operated sites |  |  |  |  |
Environmental remediation reserves |  |  |  |  |
Number of Sites | site |  |  |  | 14 |
Remediation Balance |  |  |  | $ 114,000,000 |
Closed or non-operated Occidental sites |  |  |  |  |
Environmental remediation reserves |  |  |  |  |
Number of Sites | site |  |  |  | 53 |
Remediation Balance |  |  |  | $ 268,000,000 |
Lower Passaic River |  |  |  |  |
Environmental remediation reserves |  |  |  |  |
Stretch of lower passaic river requiring remedial actions | mi |  | 8.3 |  |  |
Stretch of lower passaic river not covered by remedial actions | mi | 9 | 9 |  |  |
Clean-up estimated cost | $ 441,000,000 |  | $ 165,000,000 |  |

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