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PENSION AND POSTRETIREMENT BENEFITS - Schedule of Changes in Benefit Obligations and Plan Asset (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
May 31, 2026 | May 25, 2025 | May 26, 2024
Pension Plan [Member] |  |  |
PENSION AND POSTRETIREMENT BENEFITS |  |  |
Benefit obligation at beginning of year | $ 1,693.8 | $ 2,574.7 |
Service cost | 5.4 | 5.5 | $ 5.8
Interest cost | 87.8 | 136.1 | 144.7
Amendments | 1.5 | 0.1 |
Actuarial loss (gain) | 66.5 | (148.6) |
Plan settlements | (40.3) | (679.4) |
Benefits paid | (138.9) | (194.6) |
Benefit obligation at end of year | 1,675.8 | 1,693.8 | 2,574.7
Fair value of plan assets at beginning of year | 1,946.8 | 2,738.9 |
Actual return on plan assets | 173.5 | 70.0 |
Employer contributions | 11.4 | 11.9 |
Plan settlements | (40.3) | (679.4) |
Benefits paid | (138.9) | (194.6) |
Fair value of plan assets at end of year | 1,952.5 | 1,946.8 | 2,738.9
Other Postretirement Benefits Plan [Member] |  |  |
PENSION AND POSTRETIREMENT BENEFITS |  |  |
Benefit obligation at beginning of year | 48.3 | 48.1 |
Service cost | 0.1 | 0.1 | 0.1
Interest cost | 2.2 | 2.4 | 2.5
Actuarial loss (gain) | (0.4) | 4.4 |
Benefits paid | (5.9) | (6.7) |
Benefit obligation at end of year | 44.3 | 48.3 | 48.1
Fair value of plan assets at beginning of year |  | 3.7 |
Actual return on plan assets |  | (3.7) |
Employer contributions | 5.9 | 6.7 |
Benefits paid | $ (5.9) | $ (6.7) |
Fair value of plan assets at end of year |  |  | $ 3.7

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