Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Feb. 23, 2020	Feb. 24, 2019	Feb. 23, 2020	Feb. 24, 2019
Other comprehensive income (loss) Pre-Tax Amount:
Net income	$ 147.1	$ 181.0	$ 482.6	$ 484.7
Reclassification of post-retirement benefits out of accumulated other comprehensive income (loss)	0.2	0.2	0.6	0.6
Unrealized currency translation gains (losses)	(7.8)	2.4	(17.3)	(9.5)
Comprehensive income (loss)	139.5	183.6	465.9	475.8
Less: Comprehensive income attributable to noncontrolling interests				8.6
Comprehensive income (loss) attributable to Lamb Weston Holdings, Inc.			465.9	467.2
Other comprehensive income (loss) Tax (Expense) Benefit:
Net income	(35.7)	(39.6)	(115.1)	(107.9)
Reclassification of post-retirement benefits out of accumulated other comprehensive income (loss)	(0.1)		(0.2)	(0.1)
Unrealized currency translation gains (losses)	0.6		1.6
Comprehensive income (loss)	(35.2)	(39.6)	(113.7)	(108.0)
Comprehensive income (loss) attributable to Lamb Weston Holdings, Inc.			(113.7)	(108.0)
Other comprehensive income (loss) After Tax Amount:
Net income	111.4	141.4	367.5	376.8
Reclassification of post-retirement benefits out of accumulated other comprehensive income (loss)	0.1	0.2	0.4	0.5
Unrealized currency translation gains (losses)	(7.2)	2.4	(15.7)	(9.5)
Comprehensive income (loss)	104.3	144.0	352.2	367.8
Less: Comprehensive income attributable to noncontrolling interests				8.6
Comprehensive income (loss) attributable to Lamb Weston Holdings, Inc.	$ 104.3	$ 144.0	$ 352.2	$ 359.2