Environmental Liabilities and Expenditures (Tables)

9 Months Ended

Sep. 30, 2018

Environmental Remediation Obligations [Abstract]

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

	Number of Sites	Reserve Balance (in millions)
NPL sites	34	$	453
Third-party sites	69	172
Occidental-operated sites	14	114
Closed or non-operated Occidental sites	29	137
Total	146	$	876