Summary Of Significant Accounting Policies (Basic And Diluted Earnings Per Common Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	May 31, 2020	Feb. 23, 2020	Nov. 24, 2019	Aug. 25, 2019	May 26, 2019	Feb. 24, 2019	Nov. 25, 2018	Aug. 26, 2018	May 31, 2020	May 26, 2019	May 27, 2018
Accounting Policies [Abstract]
Earnings (loss) from continuing operations	$ (479.7)	$ 233.3	$ 25.4	$ 171.8	$ 208.7	$ 225.1	$ 115.9	$ 168.9	$ (49.2)	$ 718.6	$ 603.8
Losses from discontinued operations	(0.3)	(1.0)	(0.7)	(1.2)	(0.7)	(1.5)	(0.3)	(2.7)	(3.2)	(5.2)	(7.8)
Net earnings (loss)	$ (480.0)	$ 232.3	$ 24.7	$ 170.6	$ 208.0	$ 223.6	$ 115.6	$ 166.2	$ (52.4)	$ 713.4	$ 596.0
Average common shares outstanding - Basic (in shares)									122.7	123.5	124.0
Effect of dilutive stock-based compensation (in shares)									0.0	1.9	2.0
Average common shares outstanding - Diluted (in shares)									122.7	125.4	126.0
Basic net earnings per share:
Earnings (loss) from continuing operations (in dollars per share)	$ (3.85)	$ 1.92	$ 0.21	$ 1.40	$ 1.70	$ 1.83	$ 0.94	$ 1.36	$ (0.40)	$ 5.82	$ 4.87
Losses from discontinued operations (in dollars per share)	(0.01)	0	(0.01)	(0.01)	(0.01)	(0.02)	(0.01)	(0.02)	(0.03)	(0.04)	(0.06)
Net earnings (loss) (in dollars per share)	(3.86)	1.92	0.20	1.39	1.69	1.81	0.93	1.34	(0.43)	5.78	4.81
Diluted net earnings per share:
Earnings (loss) from continuing operations (in dollars per share)	(3.85)	1.90	0.21	1.38	1.67	1.80	0.92	1.34	(0.40)	5.73	4.79
Losses from discontinued operations (in dollars per share)	(0.01)	(0.01)	(0.01)	(0.01)	0	(0.01)	0	(0.02)	(0.03)	(0.04)	(0.06)
Net earnings (loss) (in dollars per share)	$ (3.86)	$ 1.89	$ 0.20	$ 1.37	$ 1.67	$ 1.79	$ 0.92	$ 1.32	$ (0.43)	$ 5.69	$ 4.73