Net periodic benefit income and contributions for defined benefit pension and other postretirement benefit plans consisted of the following:



	First Quarter Ended
	Pension Benefits						Other Postretirement Benefits
	June 16, 2018 (16 weeks)			June 17, 2017 (16 weeks)			June 16, 2018 (16 weeks)			June 17, 2017 (16 weeks)
Interest cost	$	28		$	24		$	—		$	—
Expected return on assets	(40		)	(40		)	—			—
Amortization of prior service benefit	—			—			(4		)	(5		)
Amortization of net actuarial loss	4			3			—			1
Net periodic benefit income	$	(8	)	$	(13	)	$	(4	)	$	(4	)
Contributions to benefit plans	$	(5	)	$	(1	)	$	—		$	—

Multiemployer Pension Plans

During the first quarters of fiscal 2019 and 2018, we contributed $13 and $10, respectively, to various multiemployer pension plans, primarily defined benefit pension plans, under collective bargaining agreements.

Pension Contributions

No minimum contributions are required to our pension plans in fiscal 2019 in accordance with the Employee Retirement Income Security Act of 1974, as amended (“ERISA”). We anticipate our fiscal 2019 discretionary pension contributions and required minimum other postretirement benefit plan contributions will be approximately $5 to $10.