BUSINESS SEGMENTS AND RELATED INFORMATION - Schedule of Net Derivative Gains (Losses) from Economic Hedges of Forecasted Commodity Consumption and Foreign Currency Risk (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Nov. 28, 2021	Nov. 29, 2020	Nov. 28, 2021	Nov. 29, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Gross derivative gains (losses) incurred			$ 14.0
Commodity Contracts and Foreign Currency Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gross derivative gains (losses) incurred	$ 7.0	$ 0.1	17.2	$ (3.9)
Commodity Contracts and Foreign Currency Contracts | Reporting segments
Derivative Instruments, Gain (Loss) [Line Items]
Gross derivative gains (losses) incurred	8.8	(3.2)	13.8	(4.7)
Commodity Contracts and Foreign Currency Contracts | Reporting segments | Grocery & Snacks
Derivative Instruments, Gain (Loss) [Line Items]
Gross derivative gains (losses) incurred	4.7	(2.6)	7.9	(4.4)
Commodity Contracts and Foreign Currency Contracts | Reporting segments | Net derivative gains (losses) allocated to Refrigerated & Frozen
Derivative Instruments, Gain (Loss) [Line Items]
Gross derivative gains (losses) incurred	4.6	(0.9)	9.3	(2.0)
Commodity Contracts and Foreign Currency Contracts | Reporting segments | Net derivative gains (losses) allocated to International
Derivative Instruments, Gain (Loss) [Line Items]
Gross derivative gains (losses) incurred	(0.7)	0.8	(3.9)	2.4
Commodity Contracts and Foreign Currency Contracts | Reporting segments | Net derivative gains (losses) allocated to Foodservice
Derivative Instruments, Gain (Loss) [Line Items]
Gross derivative gains (losses) incurred	0.2	(0.5)	0.5	(0.7)
Commodity Contracts and Foreign Currency Contracts | Corporate
Derivative Instruments, Gain (Loss) [Line Items]
Gross derivative gains (losses) incurred	$ (1.8)	$ 3.3	$ 3.4	$ 0.8