Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Nov. 28, 2021	Nov. 29, 2020	Nov. 28, 2021	Nov. 29, 2020
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [ABSTRACT]
Net earnings, including earnings attributable to redeemable and noncontrolling interests	$ 608.4	$ 695.9	$ 1,246.6	$ 1,342.3
Other comprehensive (loss) income, net of tax:
Foreign currency translation	(38.5)	23.7	(62.4)	89.9
Other fair value changes:
Hedge derivatives	18.7	1.9	20.4	(10.2)
Reclassification to earnings:
Hedge derivatives	(6.4)	1.0	4.2	(0.7)
Amortization of losses and prior service costs	22.8	19.8	31.2	39.3
Other comprehensive (loss) income, net of tax	(3.4)	46.4	(6.6)	118.3
Total comprehensive income	605.0	742.3	1,240.0	1,460.6
Comprehensive (loss) income attributable to redeemable and noncontrolling interests	(25.8)	12.8	(49.3)	86.5
Comprehensive income attributable to General Mills	$ 630.8	$ 729.5	$ 1,289.3	$ 1,374.1