PENSION AND POSTRETIREMENT BENEFITS - Schedule of Pension Plan Weighted-Average Asset Allocations and Target Asset Allocations (Details) - USD ($) $ in Millions	May 25, 2025	May 26, 2024
PENSION AND POSTRETIREMENT BENEFITS
Weighted-average Asset Allocations	100.00%	100.00%
Defined Benefit Plan, Cash and Cash Equivalents [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets		$ 77.5
Defined Benefit Plan, Equity Securities [Member]
PENSION AND POSTRETIREMENT BENEFITS
Weighted-average Asset Allocations	7.00%	5.00%
Defined Benefit Plan, Equity Securities, US [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets		$ 95.0
Defined Benefit Plan, Debt Security [Member]
PENSION AND POSTRETIREMENT BENEFITS
Weighted-average Asset Allocations	81.00%	86.00%
Employee Benefit Plan, Real Estate [Member]
PENSION AND POSTRETIREMENT BENEFITS
Weighted-average Asset Allocations	1.00%	1.00%
Private Equity Funds [Member]
PENSION AND POSTRETIREMENT BENEFITS
Weighted-average Asset Allocations	4.00%	4.00%
Other Plan Asset Category [Member]
PENSION AND POSTRETIREMENT BENEFITS
Weighted-average Asset Allocations	7.00%	4.00%
Pension Plan Assets [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	$ 1,946.8	$ 2,738.9
Fair Value, Inputs, Level 1 [Member] | Defined Benefit Plan, Cash and Cash Equivalents [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	0.3	2.2
Fair Value, Inputs, Level 1 [Member] | Defined Benefit Plan, Equity Securities [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	73.6
Fair Value, Inputs, Level 1 [Member] | Defined Benefit Plan, Equity Securities, US [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	38.3	71.0
Fair Value, Inputs, Level 1 [Member] | Defined Benefit Plan, Equity Securities, Non-US [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets		34.8
Fair Value, Inputs, Level 1 [Member] | Receivable For Unsettled Transactions [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	43.0	20.6
Fair Value, Inputs, Level 1 [Member] | Pension Plan Assets [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	68.6	87.4
Fair Value, Inputs, Level 2 [Member] | Defined Benefit Plan, Cash and Cash Equivalents [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	93.4	75.3
Fair Value, Inputs, Level 2 [Member] | Defined Benefit Plan, Equity Securities [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	25.3
Fair Value, Inputs, Level 2 [Member] | Defined Benefit Plan, Equity Securities, US [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets		24.0
Fair Value, Inputs, Level 2 [Member] | US Treasury and Government [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	373.5	508.1
Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	1,145.9	1,797.6
Fair Value, Inputs, Level 2 [Member] | Collateralized Mortgage-Backed Securities [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	78.0	53.3
Fair Value, Inputs, Level 2 [Member] | Pension Plan Assets [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	1,716.1	2,458.3
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | Defined Benefit Plan, Cash and Cash Equivalents [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	93.1
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | Defined Benefit Plan, Equity Securities [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	98.9
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | Defined Benefit Plan, Equity Securities, US [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	38.3
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | Defined Benefit Plan, Equity Securities, Non-US [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets		34.8
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | US Treasury and Government [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	373.5	508.1
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | Corporate Debt Securities [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	1,145.9	1,797.6
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | Collateralized Mortgage-Backed Securities [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	78.0	53.3
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | Receivable For Unsettled Transactions [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	43.0	20.6
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] | Pension Plan Assets [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	1,784.7	2,545.7
Fair Value Measured at Net Asset Value Per Share [Member] | Pension Plan Assets [Member]
PENSION AND POSTRETIREMENT BENEFITS
Total pension plan assets	$ 162.1	$ 193.2