Combined and Consolidated Statements of Earnings - USD ($) $ in Millions	3 Months Ended
	Aug. 25, 2019	Aug. 26, 2018
Condensed Combined and Consolidated Statements of Earnings
Net sales	$ 989.0	$ 914.9
Net sales, type	us-gaap:ProductMember	us-gaap:ProductMember
Cost of sales	$ 740.4	$ 684.3
Cost of sales, type	us-gaap:ProductMember	us-gaap:ProductMember
Gross profit	$ 248.6	$ 230.6
Selling, general and administrative expenses	78.6	78.0
Income from operations	170.0	152.6
Interest expense, net	28.2	26.8
Income before income taxes and equity method earnings	141.8	125.8
Income tax expense	36.7	34.3
Equity method investment earnings	10.6	19.9
Net income	115.7	111.4
Less: Income attributable to noncontrolling interests		3.6
Net income attributable to Lamb Weston Holdings, Inc.	$ 115.7	$ 107.8
Earnings per share
Basic (in dollars per share)	$ 0.79	$ 0.73
Diluted (in dollars per share)	$ 0.79	$ 0.73