EARNINGS PER SHARE (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		1 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Nov. 30, 2014
Basic EPS
Net income / (loss)	$ (100)	$ 223
Net income / (loss) allocated to participating securities		(4)
Net income / (loss) available to common stockholders	(100)	219
Weighed average common shares outstanding - basic	382.1	381.8
Basic EPS (in dollars per share)	$ (0.26)	$ 0.57
Diluted EPS
Net income (loss)	(100)	223
Net income / (loss) allocated to participating securities		(4)
Net income / (loss) available to common stockholders	$ (100)	$ 219
Weighed average common shares outstanding - basic	382.1	381.8
Dilutive effect of potentially dilutive securities	0	0
Weighted average common shares outstanding - diluted	382.1	381.8
Diluted EPS (in dollars per share)	$ (0.26)	$ 0.57
Employee Stock Purchase Plan
Basic EPS
Common stock issued under employee stock purchase plan	370,000
Occidental Petroleum And Subsidiaries | Spinoff - CRC
Diluted EPS
Common stock distributed upon Spin-off				381,400,000
Assumed weighted average basic share count for periods presented prior to spin off			381,800,000