NOTE 6.RETIREMENT AND POSTRETIREMENT BENEFIT PLANS

The following table sets forth the components of the net periodic benefit costs for our defined benefit pension and postretirement benefit plans for the three- and nine-month periods ended September 30, 2014 and 2013 (in millions):

Three months ended September 30,	2014					2013
Net Periodic Benefit Costs	Pension Benefit			Postretirement Benefit		Pension Benefit			Postretirement Benefit
Service cost	$	1		$	1	$	1		$	1
Interest cost	1			—		1			—
Expected return on plan assets	(1		)	—		(1		)	—
Recognized actuarial loss	—			1		1			1
Total	$	1		$	2	$	2		$	2

Nine months ended September 30,	2014					2013
Net Periodic Benefit Costs	Pension Benefit			Postretirement Benefit		Pension Benefit			Postretirement Benefit
Service cost	$	3		$	3	$	3		$	3
Interest cost	3			2		3			2
Expected return on plan assets	(4		)	—		(3		)	—
Recognized actuarial loss	1			1		3			2
Total	$	3		$	6	$	6		$	7

We did not make any contributions in either of the three- month or nine-month periods ended September 30, 2014 and 2013, to our defined benefit pension plans.