Environmental Liabilities and Expenditures (Tables)

9 Months Ended

Sep. 30, 2019

Environmental Remediation Obligations [Abstract]

Schedule of current and non-current environmental remediation reserves by categories of sites

The following table presents Occidental’s current and non-current environmental remediation reserves as of September 30, 2019. The current portion, $149 million, is included in accrued liabilities and the non-current portion, $905 million, in deferred credits and other liabilities - environmental remediation reserves. The reserves are grouped as environmental remediation sites listed or proposed for listing by the United States Environmental Protection Agency (EPA) on the CERCLA National Priorities List (NPL) sites and three categories of non-NPL sites — third-party sites, Occidental-operated sites and closed or non-operated Occidental sites. Occidental continues to evaluate environmental liabilities assumed through the Merger with an initial determination that it will participate in or monitor remedial activities or proceedings at 42 sites. The underlying reserve balance for the environmental sites assumed through the Merger will change as more site-specific information and clean-up measures becomes available.

	Number of Sites	Reserve Balance (millions)
NPL sites	34	$	452
Third-party sites	66	223
Occidental-operated sites	14	110
Closed or non-operated Occidental sites	29	127
Environmental sites assumed from the Merger	42	142
Total	185	$	1,054