SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Effect of New Accounting Pronouncement on Financial Statements (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	May 26, 2019	Feb. 24, 2019	Nov. 25, 2018	Aug. 26, 2018	May 27, 2018	Feb. 25, 2018	Nov. 26, 2017	Aug. 27, 2017	May 26, 2019	May 27, 2018	May 28, 2017	May 28, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Receivables, less allowance for doubtful accounts	$ 831.7				$ 569.4				$ 831.7	$ 569.4
Inventories	1,571.7				988.7				1,571.7	988.7
Prepaid expenses and other current assets	93.8				184.9				93.8	184.9
Other accrued liabilities	691.6				671.0				691.6	671.0
Other noncurrent liabilities	1,951.8				1,060.8				1,951.8	1,060.8
Net sales	2,613.2	$ 2,707.1	$ 2,383.7	$ 1,834.4	$ 1,966.2	$ 1,994.5	$ 2,173.4	$ 1,804.2	9,538.4	7,938.3	$ 7,826.9
Cost of goods sold									(6,885.4)	(5,586.8)	(5,483.1)
Income from continuing operations before income taxes and equity method investment earnings									823.3	874.8	729.5
Reclassified from Selling, general and administrative expense									(1,473.4)	(1,398.4)	(1,474.0)
Reclassified to Pension and postretirement non-service income									(35.1)	(80.4)	(55.2)
ASU 2017-07
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of goods sold										0.0	1.7
Reclassified from Selling, general and administrative expense										80.4	53.5
Reclassified to Pension and postretirement non-service income										$ 80.4	$ 55.2
Adjustments | ASU 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Receivables, less allowance for doubtful accounts	8.7								8.7			$ (7.6)
Inventories	(3.1)								(3.1)			2.8
Prepaid expenses and other current assets	(16.6)								(16.6)			6.9
Other accrued liabilities	(1.1)								(1.1)			1.4
Other noncurrent liabilities	(2.5)								(2.5)			$ 0.2
Net sales									15.5
Cost of goods sold									(24.5)
Income from continuing operations before income taxes and equity method investment earnings									(9.0)
Balances without Adoption of Topic 606
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Receivables, less allowance for doubtful accounts	840.4								840.4
Inventories	1,568.6								1,568.6
Prepaid expenses and other current assets	77.2								77.2
Other accrued liabilities	690.5								690.5
Other noncurrent liabilities	$ 1,949.3								1,949.3
Net sales									9,553.9
Cost of goods sold									(6,909.9)
Income from continuing operations before income taxes and equity method investment earnings									$ 814.3