Combined and Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	May 26, 2019	May 27, 2018	May 28, 2017
Other comprehensive income (loss) Pre-Tax Amount:
Net income	$ 620.8	$ 554.9	$ 510.4
Reclassification of post-retirement benefits out of accumulated other comprehensive income (loss)	0.7	0.3
Unrealized pension and post-retirement benefit obligations	(3.3)	(6.0)	1.6
Unrealized currency translation gains (losses)	(19.1)	9.1	(1.1)
Comprehensive income (loss)	599.1	558.3	510.9
Less: Comprehensive income attributable to noncontrolling interests	8.6	16.9	13.3
Comprehensive income (loss) attributable to Lamb Weston Holdings, Inc.	590.5	541.4	497.6
Other comprehensive income (loss) Tax (Expense) Benefit:
Net income	(133.6)	(121.2)	(170.2)
Reclassification of post-retirement benefits out of accumulated other comprehensive income (loss)	(0.1)	(0.1)
Unrealized pension and post-retirement benefit obligations	0.8	1.7	(0.6)
Comprehensive income (loss)	(132.9)	(119.6)	(170.8)
Comprehensive income (loss) attributable to Lamb Weston Holdings, Inc.	(132.9)	(119.6)	(170.8)
Other comprehensive income (loss) After Tax Amount:
Net income	487.2	433.7	340.2
Reclassification of post-retirement benefits out of accumulated other comprehensive income (loss)	0.6	0.2
Unrealized pension and post-employment benefit obligations	(2.5)	(4.3)	1.0
Unrealized currency translation gains (losses)	(19.1)	9.1	(1.1)
Comprehensive income (loss)	466.2	438.7	340.1
Less: Comprehensive income attributable to noncontrolling interests	8.6	16.9	13.3
Comprehensive income (loss) attributable to Lamb Weston Holdings, Inc.	$ 457.6	$ 421.8	$ 326.8