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Retirement and Postretirement Benefit Plans
 6 Months Ended
Jun. 30, 2022
Retirement Benefits [Abstract]  
Retirement and Postretirement Benefit Plans
NOTE 8 - RETIREMENT AND POSTRETIREMENT BENEFIT PLANS

Occidental has various defined benefit pension plans for certain domestic union, non-union hourly and foreign national employees. In addition, Occidental also provides medical and other benefits for certain active, retired and disabled employees and their eligible dependents.
Net periodic benefit costs related to pension benefits were $1 million for the three months ended June 30, 2022 and net periodic benefit gains related to pension benefits were $7 million for the three months ended June 30, 2021. Net periodic benefit costs related to pension benefits were $1 million for the six months ended June 30, 2022 and net periodic benefit gains related to pension benefits were $18 million for the six months ended June 30, 2021.
Net periodic benefit costs related to postretirement benefits were $19 million and $18 million for the three months ended June 30, 2022 and 2021, respectively, and $38 million for the six months ended June 30, 2022 and 2021.
Occidental's contributions to its defined benefit plans were $1 million and $5 million for the three months ended June 30, 2022 and 2021, respectively, and $1 million and $152 million for the six months ended June 30, 2022 and 2021, respectively. The 2021 contributions were primarily due to distributions related to a separation program and freezing of benefit accruals for Anadarko employees in 2020 and for contributions which were previously deferred in 2020 under the Coronavirus Aid, Relief, and Economic Security Act.