PRE-TAX INCOME AND INCOME TAXES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Nov. 27, 2016	May 28, 2017	May 29, 2016	May 31, 2015
Tax Credit Carryforward [Line Items]
Income taxes paid, net of refunds		$ 213.0	$ 291.3	$ 161.2
Liabilities for gross unrecognized tax benefits		39.3	32.6
Related liability for gross interest and penalties		6.0	6.4
Interest and penalties recognized		0.3	0.2	0.2
Net amount of unrecognized tax benefits that, if recognized, would favorably impact effective tax rate		31.6	17.6
Estimated decrease in gross unrecognized tax benefits		18.0
Foreign net operating loss carryforwards		25.7
Foreign net operating loss carryforwards (expiring between fiscal 2018 and 2038)		10.1
Foreign net operating loss carryforwards with no expiration dates		15.6
Federal net operating loss carryforwards (expiring in fiscal 2027)		10.5
Tax effected state net operating loss carryforwards		41.7
Foreign tax credits (expiring between fiscal 2025 and 2027)		4.0
State tax credits		9.7
Net (decrease) increase in valuation allowance		(420.1)	$ 1,400.0	$ (1.9)
Undistributed earnings of foreign subsidiaries		$ 494.0
Minimum
Tax Credit Carryforward [Line Items]
Statutes of limitations, term		3 years
Maximum
Tax Credit Carryforward [Line Items]
Statutes of limitations, term		5 years
Federal | Capital loss carryforwards
Tax Credit Carryforward [Line Items]
Capital loss carryforwards related to the private brands divestiture		$ 2,800.0
State | Capital loss carryforwards
Tax Credit Carryforward [Line Items]
Capital loss carryforwards related to the private brands divestiture		167.6
Spinoff | Lamb Weston
Tax Credit Carryforward [Line Items]
Net (decrease) increase in valuation allowance	$ (150.4)	(150.4)
Discontinued operations
Tax Credit Carryforward [Line Items]
Estimated decrease in gross unrecognized tax benefits		$ 15.6