LEASES - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	May 27, 2018	May 28, 2017	May 29, 2016
Operating Leased Assets [Line Items]
Assets under capital and financing leases	$ 82.9	$ 119.5
Accumulated depreciation	32.1	47.7
Non-cash issuances of capital and financing lease obligations	1.3	0.5	$ 103.3
Continuing operations
Operating Leased Assets [Line Items]
Rent expense under all operating leases	$ 62.5	$ 71.2	$ 77.4