CONSOLIDATED STATEMENTS OF EARNINGS - USD ($) $ in Millions	12 Months Ended
	May 27, 2018	May 28, 2017	May 29, 2016
Consolidated Statements of Earnings [Abstract]
Net sales	$ 15,740.4	$ 15,619.8	$ 16,563.1
Cost of sales	10,312.9	10,056.0	10,733.6
Selling, general, and administrative expenses	2,752.6	2,801.3	3,118.9
Divestitures loss (gain)	0.0	13.5	(148.2)
Restructuring, impairment, and other exit costs	165.6	182.6	151.4
Operating profit	2,509.3	2,566.4	2,707.4
Interest, net	373.7	295.1	303.8
Earnings before income taxes and after-tax earnings from joint ventures	2,135.6	2,271.3	2,403.6
Income taxes	57.3	655.2	755.2
After-tax earnings from joint ventures	84.7	85.0	88.4
Net earnings, including earnings attributable to redeemable and noncontrolling interests	2,163.0	1,701.1	1,736.8
Net earnings attributable to redeemable and noncontrolling interests	32.0	43.6	39.4
Net earnings attributable to General Mills	$ 2,131.0	$ 1,657.5	$ 1,697.4
Earnings per share - basic	$ 3.69	$ 2.82	$ 2.83
Earnings per share - diluted	3.64	2.77	2.77
Dividends per share	$ 1.96	$ 1.92	$ 1.78