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EMPLOYEE BENEFIT PLANS
 4 Months Ended
Jun. 19, 2021
Retirement Benefits [Abstract]  
EMPLOYEE BENEFIT PLANS EMPLOYEE BENEFIT PLANS
Pension and Other Post-Retirement Benefits

The following tables provide the components of net pension and post-retirement (income) expense (in millions):
16 weeks ended
PensionOther post-retirement benefits
June 19,
2021		June 20,
2020		June 19,
2021		June 20,
2020
Estimated return on plan assets$(32.7)$(31.5)$— $— 
Service cost6.9 4.8 — — 
Interest cost13.0 16.6 0.1 0.1 
Amortization of prior service cost0.1 0.1 — 0.6 
Amortization of net actuarial loss (gain)0.3 0.6 (0.2)(0.2)
(Income) expense, net$(12.4)$(9.4)$(0.1)$0.5 

The Company contributed $2.0 million and $54.6 million to its defined pension plans and post-retirement benefit plans during the 16 weeks ended June 19, 2021 and June 20, 2020, respectively. The Company currently anticipates contributing an additional $46.8 million to meet the minimum funding requirements for these plans for the remainder of fiscal 2021 but may make additional discretionary contributions that are determined to be beneficial to the Company.
Defined Contribution Plans and Supplemental Retirement Plans

Total contributions expensed for defined contribution plans (401(k) plans) were $16.2 million and $21.8 million for the 16 weeks ended June 19, 2021 and June 20, 2020, respectively.

Multiemployer Pension Plans

ARP Act: The American Rescue Plan Act ("ARP Act") was signed into law on March 11, 2021. The ARP Act establishes a special financial assistance program for financially troubled multiemployer pension plans. Under the ARP Act, eligible multiemployer plans can apply to receive a one-time cash payment in the amount projected by the Pension Benefit Guaranty Corporation ("PBGC") to pay pension benefits through the plan year ending 2051. On July 9, 2021, the PBGC issued its interim final rule with respect to the special financial assistance program. The PBGC interim final rule provides direction on the application requirements, identifies which plans will have priority, eligibility requirements, the determination of the amount of financial assistance to be provided and establishes conditions and restrictions that apply to plans that receive the assistance. The Company is currently evaluating the interim final rule, which is subject to a 30-day comment period, including any potential impact to the Company's Excess Plan as defined in and further described in "Part II—Item 8. Financial Statements and Supplemental Data—Note 12" of the Company's Annual Report on Form 10-K for the fiscal year ended February 27, 2021.