INVESTMENTS IN JOINT VENTURES - Variable Interest Entity - Consolidated - Reported in Condensed Combined and Consolidated Balance Sheets (Details) - USD ($) $ in Millions	Aug. 27, 2017	May 28, 2017	Aug. 28, 2016	May 29, 2016
Condensed Consolidated Balance Sheets
Cash and equivalents	$ 69.8	$ 57.1	$ 72.4	$ 36.4
Receivables, less allowance for doubtful accounts	213.7	185.2
Inventories	494.4	525.0
Prepaid expenses and other current assets	60.5	90.9
Property, plant and equipment, net	1,309.5	1,271.2
Goodwill	134.1	133.0
Intangible assets, net	36.8	37.2
Accounts payable	261.6	295.0
Accrued liabilities	183.9	200.5
Redeemable noncontrolling interest	54.1	50.7
Lamb Weston BSW
Condensed Consolidated Balance Sheets
Cash and equivalents	11.9	10.9
Receivables, less allowance for doubtful accounts	0.2	0.1
Inventories	1.7	1.9
Prepaid expenses and other current assets	0.2	0.4
Property, plant and equipment, net	48.8	49.4
Goodwill	18.8	18.8
Intangible assets, net	4.3	4.5
Total assets	85.9	86.0
Current portion of long-term debt	1.6	1.5
Accounts payable	14.6	11.6
Accrued liabilities	1.6	2.0
Long-term debt, excluding current portion	27.2	28.0
Total liabilities	45.0	43.1
Redeemable noncontrolling interest	54.1	$ 50.7
Lamb Weston BSW | Eliminated in consolidation
Condensed Consolidated Balance Sheets
Receivables, less allowance for doubtful accounts	$ 31.0		$ 24.0