Environmental Liabilities and Expenditures (Tables)

3 Months Ended

Mar. 31, 2019

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	35	$	458
Third-party sites	68	170
Occidental-operated sites	14	114
Closed or non-operated Occidental sites	29	133
Total	146	$	875