Pension and Retiree Medical Benefits

The components of net periodic benefit cost for pension and retiree medical plans are as follows:



	12 Weeks Ended
	Pension												Retiree Medical
	9/6/2014			9/7/2013			9/6/2014			9/7/2013			9/6/2014			9/7/2013
	U.S.						International
Service cost	$	91		$	107		$	24		$	28		$	8		$	10
Interest cost	134			122			33			29			14			13
Expected return on plan assets	(181		)	(190		)	(44		)	(39		)	(6		)	(6		)
Amortization of prior service cost/(credit)	5			4			—			—			(5		)	(6		)
Amortization of net losses/(gains)	40			67			14			17			(2		)	—
	89			110			27			35			9			11
Settlement loss	—			—			3			—			—			—
Special termination benefits	3			—			—			—			1			—
Total expense	$	92		$	110		$	30		$	35		$	10		$	11



	36 Weeks Ended
	Pension												Retiree Medical
	9/6/2014			9/7/2013			9/6/2014			9/7/2013			9/6/2014			9/7/2013
	U.S.						International
Service cost	$	272		$	323		$	67		$	77		$	24		$	31
Interest cost	402			365			90			81			42			38
Expected return on plan assets	(543		)	(570		)	(120		)	(109		)	(18		)	(18		)
Amortization of prior service cost/(credit)	14			13			—			1			(15		)	(16		)
Amortization of net losses/(gains)	121			200			36			46			(4		)	—
	266			331			73			96			29			35
Settlement loss	—			—			3			1			—			—
Special termination benefits	11			3			—			—			2			—
Total expense	$	277		$	334		$	76		$	97		$	31		$	35

We regularly evaluate different opportunities to reduce risk and volatility associated with our pension and retiree medical plans. During the second quarter of 2014, we made discretionary contributions of $19 million to our international pension plans. During the first quarter of 2013, we made discretionary contributions of $13 million to our international pension plans.