SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Aug. 26, 2018	Aug. 27, 2017	May 27, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Unrealized gains on available-for-sale securities reclassified to retained earnings	$ 0.0	$ 0.2
Receivables, less allowance for doubtful accounts	599.2		$ 582.6
Inventories	1,108.5		997.1
Prepaid expenses and other current assets	224.7		186.8
Other accrued liabilities	743.9		672.9
Other noncurrent liabilities	1,002.9		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	599.2
Inventories	1,108.5
Prepaid expenses and other current assets	224.7
Other accrued liabilities	743.9
Other noncurrent liabilities	1,002.9
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	7.9		(7.6)
Inventories	(3.2)		2.8
Prepaid expenses and other current assets	(22.5)		6.9
Other accrued liabilities	(1.1)		1.4
Other noncurrent liabilities	$ (4.2)		$ 0.2