INVESTMENTS IN JOINT VENTURES - Schedule of equity method investments (Details) - USD ($) $ in Millions	12 Months Ended
	May 26, 2024	May 28, 2023	May 29, 2022
INVESTMENTS IN JOINT VENTURES
Profit (loss)	$ 347.7	$ 683.2	$ 888.2
Current assets	3,149.5	3,385.0
Current liabilities	3,241.8	4,440.7
Ardent Mills [Member]
INVESTMENTS IN JOINT VENTURES
Revenues	4,597.9	5,239.9	4,258.5
Gross profit	642.0	745.4	516.5
Profit (loss)	361.5	453.2	306.2
Current assets	1,430.0	1,716.8
Noncurrent assets	1,862.9	1,840.5
Current liabilities	668.5	750.3
Noncurrent liabilities	569.0	556.9
Other Joint Ventures [Member]
INVESTMENTS IN JOINT VENTURES
Revenues	361.4	283.3	253.2
Gross profit	87.1	59.4	54.8
Profit (loss)	37.4	22.3	21.1
Current assets	157.2	131.4
Noncurrent assets	48.9	42.6
Current liabilities	57.1	46.7
Noncurrent liabilities	3.2	9.0
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]
INVESTMENTS IN JOINT VENTURES
Revenues	4,959.3	5,523.2	4,511.7
Gross profit	729.1	804.8	571.3
Profit (loss)	$ 398.9	$ 475.5	$ 327.3