Consolidated Statements of Total Equity and Redeemable Interest (Unaudited) - USD ($) shares in Millions, $ in Millions	Total	Redeemable Interest [Member]	Parent [Member]	Issued Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Treasury Stock [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							(2.5)
Stock compensation plans, shares							1.1
Ending balance, common stock shares at Aug. 29, 2021				754.6
Ending balance, treasury stock shares at Aug. 29, 2021							(148.3)
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							(150.1)
Stock compensation plans, value					9.1		46.3
Unearned compensation related to stock unit awards					(68.3)
Earned compensation					33.1
Decrease in redemption value of redeemable interest		$ (5.6)			5.6
Net earnings attributable to General Mills	627.0		$ 627.0			627.0
Comprehensive (loss) income								31.5	(8.2)
Cash dividends declared						(312.3)
Distributions to noncontrolling interest holders									(1.1)
Divestiture									0.0
Ending balance, equity at Aug. 29, 2021	$ 9,985.8			$ 75.5	1,345.0	17,384.5	$ (6,715.0)	(2,397.7)	293.5
Beginning balance, equity attributable to redeemable noncontrolling interest at May. 30, 2021		604.9
Redeemable Interest
Comprehensive loss		(15.3)
Ending balance, equity attributable to redeemable noncontrolling interest at Aug. 29, 2021		584.0
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							(6.9)
Stock compensation plans, shares							2.3
Ending balance, common stock shares at Aug. 28, 2022	754.6			754.6
Ending balance, treasury stock shares at Aug. 28, 2022	(160.3)						(160.3)
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							(500.8)
Stock compensation plans, value					9.3		102.9
Unearned compensation related to stock unit awards					(79.0)
Earned compensation					32.9
Decrease in redemption value of redeemable interest		0.0			0.0
Net earnings attributable to General Mills	820.0		$ 820.0			820.0
Comprehensive (loss) income								(27.9)	2.0
Cash dividends declared						(325.0)
Distributions to noncontrolling interest holders									(1.9)
Divestiture									5.1
Ending balance, equity at Aug. 28, 2022	$ 10,825.6			$ 75.5	$ 1,146.1	$ 19,027.6	$ (7,676.0)	$ (1,998.4)	$ 250.8
Beginning balance, equity attributable to redeemable noncontrolling interest at May. 29, 2022		0.0
Redeemable Interest
Comprehensive loss		0.0
Ending balance, equity attributable to redeemable noncontrolling interest at Aug. 28, 2022		$ 0.0