ACQUISITIONS AND DIVESTITURES - Schedule of Purchase Consideration (Details) - Crownrock L.P. - Subsequent Event $ / shares in Units, shares in Millions, $ in Millions	Aug. 01, 2024 USD ($) $ / shares shares
Business Acquisition [Line Items]
Cash portion of purchase price	$ 9,100
Net Working Capital and Other Purchase Price Adjustments	257
Pre-closing dividends declared by Occidental	13
Total Cash Purchase Price	$ 9,370
Total shares of Occidental common stock issued (in shares) | shares	29.6
Occidental common stock share price (in dollars per share) | $ / shares	$ 59.38
Stock portion of purchase price (in dollars per share)	$ 1,755
Total purchase price	$ 11,125