SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Nov. 25, 2018	Nov. 26, 2017	Aug. 27, 2017	Nov. 25, 2018	Nov. 26, 2017	May 27, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Unrealized gain on securities	$ 0.0	$ 0.2	$ 0.2	$ 0.0	$ 0.4
Receivables, less allowance for doubtful accounts	958.1			958.1		$ 582.6
Inventories	1,729.7			1,729.7		997.1
Prepaid expenses and other current assets	108.7			108.7		186.8
Other accrued liabilities	793.3			793.3		672.9
Other noncurrent liabilities	1,923.6			1,923.6		1,065.2
Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment to retained earnings						0.5
Receivables, less allowance for doubtful accounts	958.1			958.1
Inventories	1,729.7			1,729.7
Prepaid expenses and other current assets	108.7			108.7
Other accrued liabilities	793.3			793.3
Other noncurrent liabilities	1,923.6			1,923.6
Accounting Standards Update 2014-09 | Retained earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment to retained earnings						0.5
Adjustments | Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment to retained earnings						0.5
Receivables, less allowance for doubtful accounts	8.6			8.6		(7.6)
Inventories	(3.8)			(3.8)		2.8
Prepaid expenses and other current assets	(14.8)			(14.8)		6.9
Other accrued liabilities	(0.9)			(0.9)		1.4
Other noncurrent liabilities	$ (2.3)			$ (2.3)		$ 0.2