CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Nov. 25, 2012	Nov. 27, 2011	Nov. 25, 2012	Nov. 27, 2011
Statement Of Income And Comprehensive Income [Abstract]
Net earnings, including earnings attributable to redeemable and noncontrolling interests	$ 541.0	$ 449.2	$ 1,103.1	$ 853.5
Other comprehensive income (loss), net of tax:
Foreign currency translation	59.1	(303.5)	124.5	(303.8)
Other fair value changes:
Securities	0.2	(0.2)	0.4	(0.4)
Hedge derivatives	3.5	(6.6)	(4.0)	(38.4)
Reclassification to earnings:
Hedge derivatives	6.6	1.2	10.4	4.3
Amortization of losses and prior service costs	24.8	20.4	49.5	40.9
Other comprehensive income (loss), net of tax	94.2	(288.7)	180.8	(297.4)
Total comprehensive income	635.2	160.5	1,283.9	556.1
Comprehensive income (loss) attributable to redeemable and noncontrolling interests	34.4	(94.4)	53.0	(100.5)
Comprehensive income attributable to General Mills	$ 600.8	$ 254.9	$ 1,230.9	$ 656.6