Stockholders' Equity - Schedule of Total Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Feb. 22, 2026	Nov. 23, 2025	Feb. 23, 2025	Feb. 22, 2026	Feb. 23, 2025
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net earnings, including earnings attributable to noncontrolling interests	$ 305.5		$ 631.0	$ 1,923.8	$ 2,016.9
Pretax
Foreign currency translation	0.0		33.9	0.0	33.9
Net
Net actuarial gain (loss)	3.8		0.0	(3.7)	0.0
Other comprehensive income, net of tax	28.3		49.4	1.1	44.5
Total comprehensive income	333.8		680.4	1,924.9	2,061.4
Defined Benefit Pension Plans
Net
Curtailment loss		$ 6.7		6.7	0.0
General Mills
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net earnings, including earnings attributable to noncontrolling interests	303.1		625.6	1,920.3	2,001.2
Pretax
Other comprehensive income (loss)	3.5		49.1	(30.5)	90.3
Tax
Other comprehensive income (loss)	24.5		0.3	31.3	(45.0)
Net
Other comprehensive income, net of tax	28.0		49.4	0.8	45.3
Total comprehensive income	331.1		675.0	1,921.1	2,046.5
Foreign currency translation
Pretax
Other comprehensive (loss) income	(14.1)		2.5	(83.4)	9.5
Foreign currency translation	0.0		33.9	0.0	33.9
Tax
Other comprehensive (loss) income	26.1		3.7	43.1	(35.6)
Foreign currency translation	0.0		0.0	0.0	0.0
Net
Other comprehensive (loss) income	12.0		6.2	(40.3)	(26.1)
Foreign currency translation	0.0		33.9	0.0	33.9
Net actuarial loss
Pretax
Net actuarial gain (loss)	3.8		0.0	(3.7)	0.0
Tax
Net actuarial gain (loss)	0.0		0.0	0.0	0.0
Net
Net actuarial gain (loss)	3.8		0.0	(3.7)	0.0
Hedge derivatives
Pretax
Other comprehensive (loss) income	(1.4)		2.3	8.8	6.6
Reclassification to earnings	0.6		(3.7)	(2.6)	(2.9)
Tax
Other comprehensive (loss) income	(0.1)		(1.2)	(2.2)	(2.3)
Reclassification to earnings	1.7		0.7	1.0	1.6
Net
Other comprehensive (loss) income	(1.5)		1.1	6.6	4.3
Reclassification to earnings	2.3		(3.0)	(1.6)	(1.3)
Amortization of losses and prior service costs
Pretax
Reclassification to earnings	14.6		14.1	50.4	43.2
Tax
Reclassification to earnings	(3.2)		(2.9)	(10.6)	(8.7)
Net
Reclassification to earnings	11.4		11.2	39.8	34.5
Noncontrolling Interests
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net earnings, including earnings attributable to noncontrolling interests	2.4		5.4	3.5	15.7
Net
Other comprehensive income, net of tax	0.3		0.0	0.3	(0.8)
Total comprehensive income	2.7		5.4	3.8	14.9
Foreign currency translation
Net
Other comprehensive (loss) income	0.3		0.0	0.3	(0.8)
Foreign currency translation	0.0		0.0	0.0	0.0
Net actuarial gain (loss)
Net
Net actuarial gain (loss)	0.0		0.0	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