Stockholders' Equity (Schedule Of Total Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Nov. 24, 2024	Nov. 26, 2023	Nov. 24, 2024	Nov. 26, 2023
Other comprehensive income (loss), net of tax:
Foreign currency translation	$ 28.8	$ (22.3)	$ (33.1)	$ (40.4)
Other fair value changes:
Hedge derivatives	9.2	1.9	3.2	(0.4)
Reclassification to earnings:
Hedge derivatives	1.7	(2.4)	1.7	(2.2)
Amortization of losses and prior service costs	11.7	9.2	23.3	18.3
Other comprehensive income (loss), net of tax	51.4	(13.6)	(4.9)	(24.7)
Comprehensive Income:
Net earnings, including earnings attributable to noncontrolling interests	795.7	595.5	1,375.6	1,269.0
Net earnings attributable to noncontrolling interests	6.6	6.8	10.3	13.6
Total comprehensive income attributable to General Mills	848.4	581.6	1,371.5	1,243.9
General Mills [Member]
Other comprehensive income (loss), before tax:
Foreign currency translation	100.9	(32.4)	7.0	(54.4)
Other fair value changes:
Hedge derivatives	11.8	2.5	4.3	(0.2)
Reclassification to earnings:
Hedge derivatives	1.2	(3.4)	0.8	(4.7)
Amortization of losses and prior service costs	14.6	11.5	29.1	23.0
Other comprehensive income (loss), before tax	128.5	(21.8)	41.2	(36.3)
Other comprehensive (loss) income, tax:
Foreign currency translation	(70.8)	9.8	(39.3)	13.6
Other fair value changes:
Hedge derivatives	(2.6)	(0.6)	(1.1)	(0.2)
Reclassification to earnings:
Hedge derivatives	0.5	1.0	0.9	2.5
Amortization of losses and prior service costs	(2.9)	(2.3)	(5.8)	(4.7)
Other comprehensive income (loss), tax	(75.8)	7.9	(45.3)	11.2
Other comprehensive income (loss), net of tax:
Foreign currency translation	30.1	(22.6)	(32.3)	(40.8)
Other fair value changes:
Hedge derivatives	9.2	1.9	3.2	(0.4)
Reclassification to earnings:
Hedge derivatives	1.7	(2.4)	1.7	(2.2)
Amortization of losses and prior service costs	11.7	9.2	23.3	18.3
Other comprehensive income (loss), net of tax	52.7	(13.9)	(4.1)	(25.1)
Comprehensive Income:
Net earnings, including earnings attributable to noncontrolling interests	795.7	595.5	1,375.6	1,269.0
Total comprehensive income attributable to General Mills	848.4	581.6	1,371.5	1,243.9
Noncontrolling Interests [Member]
Other comprehensive income (loss), before tax:
Foreign currency translation			(0.8)	0.4
Other comprehensive income (loss), net of tax:
Foreign currency translation	(1.3)	0.3
Other fair value changes:
Hedge derivatives	0.0	0.0	0.0	0.0
Reclassification to earnings:
Hedge derivatives	0.0	0.0	0.0	0.0
Amortization of losses and prior service costs	0.0	0.0	0.0	0.0
Other comprehensive income (loss), net of tax	(1.3)	0.3	(0.8)	0.4
Comprehensive Income:
Total comprehensive income attributable to noncontrolling interests	$ 5.3	$ 7.1	$ 9.5	$ 14.0