4. BENEFIT PLANS

The following table provides the components of net periodic benefit cost for the Company-sponsored defined benefit pension plans and other post-retirement benefit plans for the second quarters of 2016 and 2015.

	Second Quarter Ended
	Pension Benefits						Other Benefits
	August 13, 2016			August 15, 2015			August 13, 2016			August 15, 2015
Components of net periodic benefit cost:
Service cost	$	15		$	16		$	2		$	3
Interest cost	43			39			3			2
Expected return on plan assets	(55		)	(53		)	—			—
Amortization of:
Prior service cost	—			—			(2		)	(3		)
Actuarial loss (gain)	15			24			(2		)	(1		)


Net periodic benefit cost	$	18		$	26		$	1		$	1

	Two Quarters Ended
	Pension Benefits						Other Benefits
	August 13, 2016			August 15, 2015			August 13, 2016			August 15, 2015
Components of net periodic benefit cost:
Service cost	$	36		$	35		$	5		$	6
Interest cost	101			90			6			6
Expected return on plan assets	(128		)	(124		)	—			—
Amortization of:
Prior service cost	—			—			(4		)	(6		)
Actuarial loss (gain)	34			55			(5		)	(3		)


Net periodic benefit cost	$	43		$	56		$	2		$	3

The Company is not required and does not expect to make any contributions to its Company-sponsored defined benefit pension plans in 2016.

The Company contributed $117 and $107 to employee 401(k) retirement savings accounts in the first two quarters of 2016 and 2015, respectively.

The Company also contributes to various multi-employer pension plans based on obligations arising from most of its collective bargaining agreements. These plans provide retirement benefits to participants based on their service to contributing employers. The Company recognizes expense in connection with these plans as contributions are funded.

During the second quarter of 2016, the Company incurred a charge of $111, $71 net of tax, due to commitments arising from the restructuring of certain multi-employer pension plan obligations during the second quarter of 2016.