Consolidated Statements of Total Equity and Redeemable Interest (Unaudited) - USD ($) shares in Millions, $ in Millions	Total	Redeemable Interest [Member]	Issued Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Common stock in treasury [Member]	Accumulated Other Comprehensive Loss [Member]	Noncontrolling Interests [Member]
Beginning balance, treasury stock shares at May. 30, 2021						(146.9)
Stockholders' Equity, Number of Shares
Shares purchased, shares						(6.2)
Stock compensation plans, shares						1.7
Ending balance, common stock shares at Nov. 28, 2021			754.6
Ending balance, treasury stock shares at Nov. 28, 2021						(151.4)
Beginning balance, equity at May. 30, 2021	$ 9,773.2			$ 1,365.5	$ 17,069.8	$ (6,611.2)	$ (2,429.2)	$ 302.8
Stockholders Equity Including Portion Attributable To Noncontrolling Interest [Abstract]
Shares purchased, value						(375.0)
Stock compensation plans, value				4.0		71.0
Unearned compensation related to stock unit awards				(72.2)
Earned compensation				53.7
Decrease in redemption value of redeemable interest		$ (14.1)		14.1
Net earnings attributable to General Mills	1,224.2				1,224.2
Comprehensive (loss) income							65.1	(20.1)
Cash dividends declared					(930.8)
Distributions to noncontrolling interest holders								(2.5)
Divestiture								0.0
Ending balance, equity at Nov. 28, 2021	9,804.7		$ 75.5	1,365.1	17,363.2	$ (6,915.2)	(2,364.1)	280.2
Beginning balance, equity attributable to redeemable noncontrolling interest at May. 30, 2021		604.9
Redeemable Interest
Comprehensive loss		(29.2)
Decrease in redemption value of redeemable interest		(14.1)		14.1
Ending balance, equity attributable to redeemable noncontrolling interest at Nov. 28, 2021		561.6
Beginning balance, treasury stock shares at Aug. 29, 2021						(148.3)
Stockholders' Equity, Number of Shares
Shares purchased, shares						(3.7)
Stock compensation plans, shares						0.6
Ending balance, common stock shares at Nov. 28, 2021			754.6
Ending balance, treasury stock shares at Nov. 28, 2021						(151.4)
Beginning balance, equity at Aug. 29, 2021	9,985.9			1,345.0	17,384.5	$ (6,715.0)	(2,397.7)	293.5
Stockholders Equity Including Portion Attributable To Noncontrolling Interest [Abstract]
Shares purchased, value						(224.9)
Stock compensation plans, value				(5.1)		24.7
Unearned compensation related to stock unit awards				(3.9)
Earned compensation				20.6
Decrease in redemption value of redeemable interest		(8.5)		8.5
Net earnings attributable to General Mills	597.2				597.2
Comprehensive (loss) income							33.6	(11.9)
Cash dividends declared					(618.5)
Distributions to noncontrolling interest holders								(1.4)
Ending balance, equity at Nov. 28, 2021	$ 9,804.7		$ 75.5	1,365.1	17,363.2	$ (6,915.2)	(2,364.1)	280.2
Beginning balance, equity attributable to redeemable noncontrolling interest at Aug. 29, 2021		584.0
Redeemable Interest
Comprehensive loss		(13.9)
Decrease in redemption value of redeemable interest		(8.5)		8.5
Ending balance, equity attributable to redeemable noncontrolling interest at Nov. 28, 2021		561.6
Beginning balance, common stock shares at May. 29, 2022	754.6
Beginning balance, treasury stock shares at May. 29, 2022	(155.7)					(155.7)
Stockholders' Equity, Number of Shares
Shares purchased, shares						(12.1)
Stock compensation plans, shares						3.4
Ending balance, common stock shares at Nov. 27, 2022	754.6		754.6
Ending balance, treasury stock shares at Nov. 27, 2022	(164.4)					(164.4)
Beginning balance, equity at May. 29, 2022	$ 10,788.0			1,182.9	18,532.6	$ (7,278.1)	(1,970.5)	245.6
Stockholders Equity Including Portion Attributable To Noncontrolling Interest [Abstract]
Shares purchased, value						(901.3)
Stock compensation plans, value				1.9		155.9
Unearned compensation related to stock unit awards				(85.8)
Earned compensation				56.3
Decrease in redemption value of redeemable interest		0.0		0.0
Net earnings attributable to General Mills	1,425.9				1,425.9
Comprehensive (loss) income								5.0
Cash dividends declared					(966.6)
Other comprehensive (loss) income							(107.5)
Distributions to noncontrolling interest holders								(4.8)
Divestiture								5.1
Ending balance, equity at Nov. 27, 2022	$ 10,372.1		$ 75.5	1,155.3	18,991.9	$ (8,023.5)	(2,078.0)	250.9
Beginning balance, equity attributable to redeemable noncontrolling interest at May. 29, 2022		0.0
Redeemable Interest
Comprehensive loss		0.0
Decrease in redemption value of redeemable interest		0.0		0.0
Ending balance, equity attributable to redeemable noncontrolling interest at Nov. 27, 2022		0.0
Beginning balance, treasury stock shares at Aug. 28, 2022						(160.3)
Stockholders' Equity, Number of Shares
Shares purchased, shares						(5.2)
Stock compensation plans, shares						1.1
Ending balance, common stock shares at Nov. 27, 2022	754.6		754.6
Ending balance, treasury stock shares at Nov. 27, 2022	(164.4)					(164.4)
Beginning balance, equity at Aug. 28, 2022	$ 10,825.6			1,146.1	19,027.6	$ (7,676.0)	(1,998.4)	250.8
Stockholders Equity Including Portion Attributable To Noncontrolling Interest [Abstract]
Shares purchased, value						(400.5)
Stock compensation plans, value				(7.4)		53.0
Unearned compensation related to stock unit awards				(6.8)
Earned compensation				23.4
Decrease in redemption value of redeemable interest		0.0		0.0
Net earnings attributable to General Mills	605.9				605.9
Comprehensive (loss) income							(79.6)	3.0
Cash dividends declared					(641.6)
Distributions to noncontrolling interest holders								(2.9)
Ending balance, equity at Nov. 27, 2022	$ 10,372.1		$ 75.5	1,155.3	$ 18,991.9	$ (8,023.5)	$ (2,078.0)	$ 250.9
Redeemable Interest
Comprehensive loss		0.0
Decrease in redemption value of redeemable interest		0.0		$ 0.0
Ending balance, equity attributable to redeemable noncontrolling interest at Nov. 27, 2022		$ 0.0