Retirement and Postretirement Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2019

Retirement Benefits [Abstract]

Components of the net periodic benefit costs

The following table sets forth the components of the net periodic benefit costs for Occidental’s defined benefit plans for the three and six months ended June 30, 2019, and 2018 (in millions):

Three months ended June 30	2019						2018
Net Periodic Benefit Costs	Pension Benefit			Postretirement Benefit			Pension Benefit			Postretirement Benefit
Service cost	$	1		$	5		$	2		$	6
Interest cost	3			10			4			9
Expected return on plan assets	(5		)	—			(6		)	—
Recognized actuarial loss	3			2			1			6
Recognized prior service cost	—			(2		)	—			—
Total	$	2		$	15		$	1		$	21

Six months ended June 30	2019						2018
Net Periodic Benefit Costs	Pension Benefit			Postretirement Benefit			Pension Benefit			Postretirement Benefit
Service cost	$	2		$	11		$	4		$	12
Interest cost	7			18			8			18
Expected return on plan assets	(10		)	—			(12		)	—
Recognized actuarial loss	5			4			2			10
Recognized prior service cost	—			(4		)	—			—
Total	$	4		$	29		$	2		$	40