Stockholders' Equity - Schedule of Total Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Nov. 23, 2025	Nov. 24, 2024	Nov. 23, 2025	Nov. 24, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net earnings, including earnings attributable to noncontrolling interests	$ 414.3	$ 802.3	$ 1,618.3	$ 1,385.9
Net
Net actuarial loss	0.0	0.0	(7.5)	0.0
Other comprehensive income (loss), net of tax	27.8	51.4	(27.2)	(4.9)
Total comprehensive income	442.1	853.7	1,591.1	1,381.0
Defined Benefit Pension Plans
Net
Curtailment loss	6.7	0.0	6.7	0.0
General Mills
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net earnings, including earnings attributable to noncontrolling interests	413.0	795.7	1,617.2	1,375.6
Pretax
Other comprehensive income (loss)	55.9	128.5	(34.0)	41.2
Tax
Other comprehensive income (loss)	(27.6)	(75.8)	6.8	(45.3)
Net
Other comprehensive income (loss), net of tax	28.3	52.7	(27.2)	(4.1)
Total comprehensive income	441.3	848.4	1,590.0	1,371.5
Foreign currency translation
Pretax
Other comprehensive (loss) income	34.8	100.9	(69.3)	7.0
Net actuarial loss			(7.5)	0.0
Tax
Other comprehensive (loss) income	(21.9)	(70.8)	17.0	(39.3)
Net actuarial loss			0.0	0.0
Net
Other comprehensive (loss) income	12.9	30.1	(52.3)	(32.3)
Net actuarial loss			(7.5)	0.0
Hedge derivatives
Pretax
Other comprehensive (loss) income	4.0	11.8	10.2	4.3
Reclassification to earnings	(4.1)	1.2	(3.2)	0.8
Tax
Other comprehensive (loss) income	(0.9)	(2.6)	(2.1)	(1.1)
Reclassification to earnings	(0.6)	0.5	(0.7)	0.9
Net
Other comprehensive (loss) income	3.1	9.2	8.1	3.2
Reclassification to earnings	(4.7)	1.7	(3.9)	1.7
Amortization of losses and prior service costs
Pretax
Reclassification to earnings	21.2	14.6	35.8	29.1
Tax
Reclassification to earnings	(4.2)	(2.9)	(7.4)	(5.8)
Net
Reclassification to earnings	17.0	11.7	28.4	23.3
Noncontrolling Interests
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net earnings, including earnings attributable to noncontrolling interests	1.3	6.6	1.1	10.3
Net
Other comprehensive income (loss), net of tax	(0.5)	(1.3)	0.0	(0.8)
Total comprehensive income	0.8	5.3	1.1	9.5
Foreign currency translation
Net
Other comprehensive (loss) income	(0.5)	(1.3)	0.0	(0.8)
Net actuarial loss			0.0	0.0
Hedge derivatives
Net
Other comprehensive (loss) income	0.0	0.0	0.0	0.0
Reclassification to earnings	0.0	0.0	0.0	0.0
Amortization of losses and prior service costs
Net
Reclassification to earnings	$ 0.0	$ 0.0	$ 0.0	$ 0.0