INVESTMENTS IN JOINT VENTURES - Equity Method Investments - Summarized Financial Information - Income Statement (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	May 31, 2020	Feb. 23, 2020	Nov. 24, 2019	Aug. 25, 2019	May 26, 2019	Feb. 24, 2019	Nov. 25, 2018	Aug. 26, 2018	May 31, 2020	May 26, 2019	May 27, 2018
Summarized combined financial information for equity method investments
Gross profit	$ 111.1	$ 250.4	$ 285.1	$ 248.6	$ 250.5	$ 273.4	$ 249.0	$ 230.6	$ 895.2	$ 1,003.5	$ 879.5
Total before tax									478.2	620.8	554.9
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Summarized combined financial information for equity method investments
Net sales									1,137.7	1,172.6	1,142.7
Gross profit									145.8	212.2	249.5
Total before tax									$ 58.7	$ 119.0	$ 167.2