COST SAVINGS PROGRAM AND RESTRUCTURING - Summary of the Pre-Tax Costs (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Feb. 22, 2026	Feb. 23, 2025	Feb. 22, 2026	Feb. 23, 2025
Restructuring Cost and Reserve [Line Items]
Net restructuring charges	$ 55.5	$ 10.3	$ 101.5	$ 169.4
Restructuring charges, total	48.2	9.6	94.6	84.2
Restructuring Plan And Cost Savings Program
Restructuring Cost and Reserve [Line Items]
Net restructuring charges	66.1	10.3	112.1	169.4
Sale of non-core assets	(10.6)	0.0	(10.6)	0.0
Restructuring charges, total	55.5	10.3	101.5	169.4
Gain on the sale of non-core assets			1.4
Retirement of assets and other plant charges \| Restructuring Plan And Cost Savings Program
Restructuring Cost and Reserve [Line Items]
Net restructuring charges	46.9	7.2	48.7	53.0
Potato contract terminations \| Restructuring Plan And Cost Savings Program
Restructuring Cost and Reserve [Line Items]
Net restructuring charges	0.0	(3.2)	0.0	61.5
Inventory write-off \| Restructuring Plan And Cost Savings Program
Restructuring Cost and Reserve [Line Items]
Net restructuring charges	7.3	3.9	7.3	23.7
Employee related costs \| Restructuring Plan And Cost Savings Program
Restructuring Cost and Reserve [Line Items]
Net restructuring charges	6.1	0.7	15.1	16.9
Professional services and other \| Restructuring Plan And Cost Savings Program
Restructuring Cost and Reserve [Line Items]
Net restructuring charges	$ 5.8	$ 1.7	$ 41.0	$ 14.3

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