ENVIRONMENTAL LIABILITIES AND EXPENDITURES (Tables)

12 Months Ended

Dec. 31, 2018

Environmental Remediation Obligations [Abstract]

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

($ amounts in millions)	2018			2017			2016
	Number of Sites	Reserve Balance		Number of Sites	Reserve Balance		Number of Sites	Reserve Balance
NPL sites	34	$	458	34	$	457	33	$	461
Third-party sites	68	168		70	157		68	163
Occidental-operated sites	14	115		15	108		17	106
Closed or non-operated Occidental sites	29	141		29	143		29	140
Total	145	$	882	148	$	865	147	$	870

Schedule of environmental cost for each segment

Occidental’s environmental costs, some of which include estimates, are presented below for each segment for each of the years ended December 31:

(in millions)	2018		2017		2016
Operating Expenses
Oil and Gas	$	95	$	68	$	65
Chemical	80		78		75
Midstream and Marketing	15		15		11
	$	190	$	161	$	151
Capital Expenditures
Oil and Gas	$	75	$	77	$	43
Chemical	23		18		25
Midstream and Marketing	5		6		5
	$	103	$	101	$	73
Remediation Expenses
Corporate	$	47	$	39	$	61