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Benefit Plans
 4 Months Ended
Jun. 17, 2017
Compensation and Retirement Disclosure [Abstract]  
Benefit Plans
NOTE 7—BENEFIT PLANS
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 17, 
 2017 
 (16 weeks)
 
June 18, 
 2016 
 (16 weeks)
 
June 17, 
 2017 
 (16 weeks)
 
June 18, 
 2016 
 (16 weeks)
Interest cost
$
24

 
$
26

 
$
—

 
$
1

Expected return on assets
(40
)
 
(44
)
 
—

 
—

Amortization of prior service benefit
—

 
—

 
(5
)
 
(5
)
Amortization of net actuarial loss
3

 
14

 
1

 
1

Net periodic benefit income
$
(13
)
 
$
(4
)
 
$
(4
)
 
$
(3
)
Contributions to benefit plans
$
(1
)
 
$
(1
)
 
$
—

 
$
—


Multiemployer Pension Plans
During the first quarters of fiscal 2018 and 2017, Supervalu contributed $12 and $12, respectively, to various multiemployer pension plans, primarily defined benefit pension plans, under collective bargaining agreements.
Pension Contributions
No minimum contributions are required to Supervalu's pension plans in fiscal 2018 in accordance with the Employee Retirement Income Security Act of 1974, as amended (“ERISA”). Supervalu anticipates fiscal 2018 discretionary pension contributions and required minimum other postretirement benefit plan contributions will be approximately $5 to $10.