THE ACQUISITION - SCHEDULE OF PURCHASE CONSIDERATION PAID (Details) - Anadarko Petroleum Corporation $ / shares in Units, $ in Millions	Aug. 08, 2019 USD ($) $ / shares shares
Business Acquisition [Line Items]
Total shares of Anadarko common stock eligible for acquisition consideration (in shares) | shares	491,600,000
Cash consideration (per share of common stock and shares underlying Anadarko stock-based awards eligible for acquisition consideration) (in dollars per share) | $ / shares	$ 59.00
Cash portion of Acquisition consideration | $	$ 29,002
Total shares of Anadarko common stock and shares underlying Anadarko stock-based awards eligible for acquisition consideration (in shares) | shares	491,600,000
Exchange ratio (per share of Anadarko common stock) | shares	0.2934
Total shares of Occidental common stock issued to Anadarko stockholders (in shares) | shares	144,000,000
Average share price of Occidental common stock at August 8, 2019 (usd per share) | $ / shares	$ 46.31
Stock portion of Acquisition consideration | $	$ 6,679
Acquisition consideration attributable to Anadarko stock-based awards | $	23
Total Acquisition consideration | $	$ 35,704