CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Feb. 25, 2018	Feb. 26, 2017	Feb. 25, 2018	Feb. 26, 2017
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [ABSTRACT]
Net earnings, including earnings attributable to redeemable and noncontrolling interests	$ 952.5	$ 370.2	$ 1,804.9	$ 1,285.5
Other comprehensive income (loss), net of tax:
Foreign currency translation	23.5	113.7	43.0	88.4
Other fair value changes:
Securities	0.6	0.5	1.4	0.8
Hedge derivatives	(6.7)	(4.9)	(15.6)	42.4
Reclassification to earnings:
Hedge derivatives	2.8	(8.7)	3.4	(19.3)
Amortization of losses and prior service costs	30.7	29.9	86.4	92.3
Other comprehensive income (loss), net of tax	50.9	130.5	118.6	204.6
Total comprehensive income	1,003.4	500.7	1,923.5	1,490.1
Comprehensive income (loss) attributable to redeemable and noncontrolling interests	40.7	16.4	125.5	(20.3)
Comprehensive income attributable to General Mills	$ 962.7	$ 484.3	$ 1,798.0	$ 1,510.4