PENSION AND POSTRETIREMENT BENEFITS (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Feb. 25, 2024	May 26, 2024	May 28, 2023	May 29, 2022	Dec. 31, 2023	Dec. 30, 2023
PENSION AND POSTRETIREMENT BENEFITS
Defined Benefit Plan, Recognized Net Actuarial Gain (Loss), Percentage		10.00%
Fair Value Investments Ability To Impose Customary Redemption Gates		$ 22.1
Fair Value Investments Impose Customary Redemption Gates		$ 0.0
Percentage Providing More Than Plans Contribution		5.00%
Defined Contribution Plan, Cost		$ 62.3	$ 59.4	$ 57.9
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax	$ 6.8
Maximum [Member]
PENSION AND POSTRETIREMENT BENEFITS
Red Zone Multiemployer Plans Funded Percentage		65.00%
Yellow Zone Multiemployer Plans Funded Percentage		80.00%
Minimum [Member]
PENSION AND POSTRETIREMENT BENEFITS
Green Zone Multiemployer Plan Funded Percentage		80.00%
Private Equity Funds [Member]
PENSION AND POSTRETIREMENT BENEFITS
Unfunded Commitment For Additional Investment		$ 33.1
Natural Resources Funds [Member]
PENSION AND POSTRETIREMENT BENEFITS
Unfunded Commitment For Additional Investment		$ 10.1
Fixed Income Securities [Member]
PENSION AND POSTRETIREMENT BENEFITS
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		90.00%
Defined Benefit Plan, Equity Securities [Member]
PENSION AND POSTRETIREMENT BENEFITS
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage		10.00%
Pension Plan [Member]
PENSION AND POSTRETIREMENT BENEFITS
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)		$ 31.2	$ 265.5
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate		5.58%	5.50%		5.20%	5.52%
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)		$ 118.4	$ (158.1)
Defined Benefit Plan, Accumulated Benefit Obligation		2,570.0	2,800.0
Defined Benefit Plan Recognized Net Actuarial Gain Loss		12.5	0.1	$ 2.9
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year		11.7
Defined benefit plan, settlement, payment and plan of assets	$ 135.0
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax		1.1
Other Postretirement Benefits Plan [Member]
PENSION AND POSTRETIREMENT BENEFITS
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)		$ 0.8	$ 6.3
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate		5.41%	5.37%
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)		$ 0.2	$ 0.1
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year		$ 6.6