Consolidated Statements of Total Equity - USD ($) shares in Millions, $ in Millions	Total	Parent [Member]	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. 28, 2023						(168.0)
Stockholders' Equity, Number of Shares
Shares purchased, including excise tax of $2.2 and $4.2 million, shares	(6.4)					(6.4)
Stock compensation plans						1.0
Ending Balance, Treasury Stock, Shares at Aug. 27, 2023						(173.4)
Ending Balance, Common Stock, Shares, Issued at Aug. 27, 2023			754.6
Beginning Balance, equity at May. 28, 2023	$ 10,700.0			$ 1,222.4	$ 19,838.6	$ (8,410.0)	$ (2,276.9)	$ 250.4
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Shares purchased, including excise tax of $2.2 and $4.2 million, value	(504.7)					(504.7)
Stock compensation plans				7.3		40.4
Unearned compensation related to stock unit awards				(79.4)
Earned compensation				35.4
Comprehensive income							(11.2)	6.9
Net earnings attributable to General Mills	673.5	$ 673.5			673.5
Distributions to noncontrolling interest holders								(4.3)
Cash dividends declared ($0.60 and $0.59 per share)					(348.5)
Ending Balance, equity at Aug. 27, 2023	$ 10,515.4		$ 75.5	1,185.7	20,163.6	$ (8,874.3)	(2,288.1)	253.0
Beginning Balance, Common Stock, Shares, Issued at May. 26, 2024	754.6
Beginning Balance, Treasury Stock, Shares at May. 26, 2024	(195.5)					(195.5)
Stockholders' Equity, Number of Shares
Shares purchased, including excise tax of $2.2 and $4.2 million, shares	(4.5)					(4.5)
Stock compensation plans						1.2
Ending Balance, Treasury Stock, Shares at Aug. 25, 2024	(198.8)					(198.8)
Ending Balance, Common Stock, Shares, Issued at Aug. 25, 2024	754.6		754.6
Beginning Balance, equity at May. 26, 2024	$ 9,648.5			1,227.0	20,971.8	$ (10,357.9)	(2,519.7)	251.8
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Shares purchased, including excise tax of $2.2 and $4.2 million, value	(302.2)					(302.2)
Stock compensation plans				(5.2)		58.2
Unearned compensation related to stock unit awards				(77.1)
Earned compensation				19.9
Comprehensive income							(56.8)	4.2
Net earnings attributable to General Mills	579.9	$ 579.9			579.9
Distributions to noncontrolling interest holders								(5.0)
Cash dividends declared ($0.60 and $0.59 per share)					(337.8)
Ending Balance, equity at Aug. 25, 2024	$ 9,526.6		$ 75.5	$ 1,164.6	$ 21,213.9	$ (10,601.9)	$ (2,576.5)	$ 251.0