Retirement Plans and Postretirement Benefits (Tables)

6 Months Ended

Jun. 30, 2011

Retirement Plans and Postretirement Benefits

Components of the net periodic benefit costs for the entity's defined benefit pension and postretirement benefit plans

The following table sets forth the components of the net periodic benefit costs for Occidental’s defined benefit pension and postretirement benefit plans for the three and six months ended June 30, 2011 and 2010 (in millions):

Three months ended June 30	2011					2010
Net Periodic Benefit Costs	Pension Benefit			Postretirement Benefit		Pension Benefit			Postretirement Benefit
Service cost	$	5		$	5	$	5		$	4
Interest cost	8			12		7			11
Expected return on plan assets	(8		)	—		(8		)	—
Amortization of prior service cost	—			—		1			—
Recognized actuarial loss	3			7		3			7
Total	$	8		$	24	$	8		$	22

Six months ended June 30	2011					2010
Net Periodic Benefit Costs	Pension Benefit			Postretirement Benefit		Pension Benefit			Postretirement Benefit
Service cost	$	10		$	11	$	9		$	9
Interest cost	15			23		15			22
Expected return on plan assets	(16		)	—		(16		)	—
Amortization of prior service cost	—			—		1			—
Recognized actuarial loss	6			15		6			13
Total	$	15		$	49	$	15		$	44