Combined and Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	May 27, 2018	May 28, 2017	May 29, 2016
Other comprehensive income (loss) Pre-Tax Amount:
Net income	$ 554.9	$ 510.4	$ 439.1
Reclassification of pension and post-retirement benefits out of accumulated other comprehensive income (loss)	0.3		(5.3)
Unrealized pension and post-employment benefit obligations	(6.0)	1.6	7.2
Unrealized currency translation gains (losses)	9.1	(1.1)	(5.5)
Comprehensive income (loss)	558.3	510.9	435.5
Less: Comprehensive income attributable to noncontrolling interests	16.9	13.3	9.3
Comprehensive income (loss) attributable to Lamb Weston	541.4	497.6	426.2
Other comprehensive income (loss) Tax (Expense) Benefit:
Net income	(121.2)	(170.2)	(144.5)
Reclassification of pension and post-retirement benefits out of accumulated other comprehensive income (loss)	(0.1)		1.3
Unrealized pension and post-employment benefit obligations	1.7	(0.6)	(1.8)
Comprehensive income (loss)	(119.6)	(170.8)	(145.0)
Comprehensive income (loss) attributable to Lamb Weston	(119.6)	(170.8)	(145.0)
Other comprehensive income (loss) After Tax Amount:
Net income	433.7	340.2	294.6
Reclassification of pension and post-retirement benefits out of accumulated other comprehensive income (loss)	0.2		(4.0)
Unrealized pension and post-employment benefit obligations	(4.3)	1.0	5.4
Unrealized currency translation gains (losses)	9.1	(1.1)	(5.5)
Comprehensive income (loss)	438.7	340.1	290.5
Less: Comprehensive income attributable to noncontrolling interests	16.9	13.3	9.3
Comprehensive income (loss) attributable to Lamb Weston	$ 421.8	$ 326.8	$ 281.2