Retirement and Postretirement Benefits Plans (Tables)

9 Months Ended

Sep. 30, 2021

Retirement Benefits [Abstract]

Schedule of Retirement and Postretirement Benefit Plan Costs

The following table contains a summary of Occidental's retirement and postretirement benefits plan costs for the three and nine months ended September 30, 2021 and 2020:

	Three months ended September 30,			Nine months ended September 30,
millions	2021	2020		2021	2020
Net gains related to pension settlement and curtailment (a)	1	$	8	11	$	142
Net periodic benefit costs related to pension special termination benefits (a)	—	$	3	—	$	21
Net periodic benefit costs (gains) related to pension benefits excluding settlement, curtailment and special termination benefits	(4)	$	(2)	(12)	$	22
Net periodic benefit costs related to postretirement benefits	23	$	18	61	$	56
Contributions to qualified and supplemental pension plans	5	$	30	157	$	132

(a) Net gains related to pension settlement and curtailment and costs of special termination benefits for the three and nine months ended September 30, 2021 and 2020 primarily related to a separation program and the freezing of benefit accruals for Anadarko employees.