Retirement and Post-retirement Benefit Plans

3 Months Ended

Mar. 31, 2016

Retirement and Postretirement Benefit Plans

Retirement and Postretirement Benefit Plans

8. Retirement and Post-retirement Benefit Plans

The following tables set forth the components of the net periodic benefit costs for Occidental’s defined benefit pension and post-retirement benefit plans for the three months ended March 31, 2016 and 2015 (in millions):

Three months ended March 31	2016				2015
Net Periodic Benefit Costs	Pension Benefit		Post- retirement Benefit		Pension Benefit		Post- retirement Benefit
Service cost	$	2	$	5	$	2	$	7
Interest cost	4		10		5		10
Expected return on plan assets	(6)		—		(7)		—
Recognized actuarial loss	3		5		2		7
Total	$	3	$	20	$	2	$	24

Occidental contributed approximately $1 million and $5 million to its defined benefit pension plans in the three months ended March 31, 2016 and 2015, respectively.