Consolidated Statements of Earnings - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Feb. 23, 2020	Feb. 24, 2019	Feb. 23, 2020	Feb. 24, 2019
Consolidated Statements of Earnings
Net sales	$ 937.3	$ 926.8	$ 2,945.5	$ 2,753.1
Net sales, type	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
Cost of sales	$ 686.9	$ 653.4	$ 2,161.4	$ 2,000.1
Cost of sales, type	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
Gross profit	$ 250.4	$ 273.4	$ 784.1	$ 753.0
Selling, general and administrative expenses	87.9	79.6	258.1	232.6
Income from operations	162.5	193.8	526.0	520.4
Interest expense, net	25.2	27.0	78.8	80.0
Income before income taxes and equity method earnings	137.3	166.8	447.2	440.4
Income tax expense	35.7	39.6	115.1	107.9
Equity method investment earnings	9.8	14.2	35.4	44.3
Net income	111.4	141.4	367.5	376.8
Less: Income attributable to noncontrolling interests				8.6
Net income attributable to Lamb Weston Holdings, Inc.	$ 111.4	$ 141.4	$ 367.5	$ 368.2
Earnings per share
Basic (in dollars per share)	$ 0.76	$ 0.96	$ 2.51	$ 2.44
Diluted (in dollars per share)	$ 0.76	$ 0.95	$ 2.50	$ 2.42