v3.26.1
PENSION AND POSTRETIREMENT BENEFITS (Tables)
9 Months Ended
Feb. 22, 2026
PENSION AND POSTRETIREMENT BENEFITS  
Schedule of components of pension and postretirement plan costs (benefits)

Pension Plans

Thirteen Weeks Ended

Thirty-Nine Weeks Ended

  ​ ​ ​

February 22, 2026

  ​ ​ ​

February 23, 2025

  ​ ​ ​

February 22, 2026

  ​ ​ ​

February 23, 2025

Service cost

$

1.4

$

1.4

$

4.1

$

4.1

Interest cost

22.0

34.4

66.2

101.8

Expected return on plan assets

(27.8)

(37.0)

(83.4)

(109.4)

Amortization of prior service cost

0.4

0.4

1.2

1.2

Pension cost (benefit) — Company plans

(4.0)

(0.8)

(11.9)

(2.3)

Pension cost (benefit) — multi-employer plans

2.1

2.1

7.2

7.3

Total pension cost (benefit)

$

(1.9)

$

1.3

$

(4.7)

$

5.0

Postretirement Plans

Thirteen Weeks Ended

Thirty-Nine Weeks Ended

  ​ ​ ​

February 22, 2026

  ​ ​ ​

February 23, 2025

  ​ ​ ​

February 22, 2026

  ​ ​ ​

February 23, 2025

Service cost

$

$

$

0.1

$

0.1

Interest cost

0.6

0.6

1.7

1.8

Amortization of prior service cost (benefit)

(0.4)

(0.4)

(1.3)

(1.3)

Recognized net actuarial gain

(0.9)

(1.1)

(2.7)

(3.4)

Total postretirement cost (benefit)

$

(0.7)

$

(0.9)

$

(2.2)

$

(2.8)