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PENSION AND POSTRETIREMENT BENEFITS (Tables)
3 Months Ended
Aug. 24, 2025
PENSION AND POSTRETIREMENT BENEFITS  
Schedule of Defined Benefit Plans Disclosures

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Pension Plans

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Thirteen Weeks Ended

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August 24, 2025

    

August 25, 2024

Service cost

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$

1.4

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$

1.4

Interest cost

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​

22.0

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​

34.0

Expected return on plan assets

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​

(27.8)

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​

(36.6)

Amortization of prior service cost

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​

0.4

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0.4

Pension cost (benefit) — Company plans

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​

(4.0)

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​

(0.8)

Pension cost (benefit) — multi-employer plans

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2.3

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2.2

Total pension cost (benefit)

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$

(1.7)

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$

1.4

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​

​

​

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Postretirement Plans

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Thirteen Weeks Ended

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August 24, 2025

    

August 25, 2024

Interest cost

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$

0.6

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$

0.6

Amortization of prior service cost (benefit)

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​

(0.4)

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​

(0.4)

Recognized net actuarial gain

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(0.9)

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​

(1.1)

Total postretirement cost (benefit)

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$

(0.7)

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$

(0.9)