DISCONTINUED OPERATIONS AND OTHER DIVESTITURES - Summary of Comparative Financial Results, Balance Sheet Items (Details) - USD ($) $ in Millions	Feb. 26, 2017	May 29, 2016	Feb. 28, 2016	May 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents	$ 0.0	$ 36.4	$ 36.6	$ 49.0
Discontinued operations, spinoff | Lamb Weston
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents		36.4
Receivables, less allowance for doubtful accounts of $0.5		186.5
Allowance for doubtful accounts		0.5
Inventories		498.9
Prepaid expenses and other current assets		57.9
Total current assets		779.7
Property, plant and equipment, net		1,004.1
Goodwill		133.9
Brands, trademarks and other intangibles, net		39.6
Other assets		161.7
Total noncurrent assets		1,339.3
Notes payable		24.9
Current installments of long-term debt		12.0
Accounts payable		238.7
Accrued payroll		50.3
Other accrued liabilities		83.3
Total current liabilities		409.2
Senior long-term debt, excluding current installments		36.4
Other noncurrent liabilities		268.4
Total noncurrent liabilities		304.8
Held-for-sale, not discontinued operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total current assets	0.0	117.0
Total noncurrent assets	1.7	234.1
Total current liabilities	0.0	54.7
Total noncurrent liabilities	$ 0.0	1.5
Held-for-sale, not discontinued operations | Spicetec | Commercial
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total current assets		43.3
Goodwill		104.7
Total noncurrent assets		148.3
Total current liabilities		10.3
Total noncurrent liabilities		1.2
Held-for-sale, not discontinued operations | JM Swank | Commercial
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total current assets		73.7
Goodwill		53.8
Total noncurrent assets		74.3
Total current liabilities		44.3
Total noncurrent liabilities		$ 0.4