RESTRUCTURING ACTIVITIES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Nov. 26, 2017	Nov. 27, 2016	Nov. 26, 2017	Nov. 27, 2016	Feb. 28, 2016
Discontinued operations, disposed of by sale | Private Brands
Restructuring Cost and Reserve [Line Items]
Charges that have resulted or will result in cash outflows from plan inception	$ 84.5		$ 84.5		$ 84.5
Non-cash charges from plan inception	45.7		45.7		45.7
Pre-tax expenses from plan inception	130.2		130.2		$ 130.2
Discontinued operations, spinoff | Lamb Weston
Restructuring Cost and Reserve [Line Items]
Charges that have resulted or will result in cash outflows from plan inception	2.1		2.1
SCAE Plan
Restructuring Cost and Reserve [Line Items]
Approved expenses (up to) in connection with the SCAE Plan	900.9		900.9
Charges incurred or expected to be incurred	464.8		464.8
Cash charges incurred or expected to be incurred	320.7		320.7
Non-cash charges incurred or expected to be incurred	144.1		144.1
Recognized charges	7.1	$ 19.8	18.5	$ 33.9
Charges that have resulted or will result in cash outflows	7.7		12.5
Non-cash charges	0.6		6.0
Charges that have resulted or will result in cash outflows from plan inception	298.0		298.0
Non-cash charges from plan inception	$ 142.8		$ 142.8