Stockholders' Equity (Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	12 Months Ended
	May 28, 2017	May 29, 2016
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	$ 1,952.0	$ 2,333.5
Ending Balance	2,101.7	1,952.0
Foreign Currency Translation Adjustment
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(1.2)	(1.7)
Gain (loss)	0.5	0.5
Reclassification realized in net earnings	0.0	0.0
Ending Balance	(0.7)	(1.2)
Unrealized Gains (Losses) on Marketable Securities
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	0.1	0.1
Gain (loss)	0.0	0.0
Reclassification realized in net earnings	0.0	0.0
Ending Balance	0.1	0.1
Unrealized Gains (Losses) on Derivatives
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	3.9	(19.1)
Gain (loss)	2.9	2.0
Reclassification realized in net earnings	1.4	21.0
Ending Balance	8.2	3.9
Benefit Plan Funding Position
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(89.8)	(65.9)
Gain (loss)	6.4	(23.5)
Reclassification realized in net earnings	12.9	(0.4)
Ending Balance	(70.5)	(89.8)
Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(87.0)	(86.6)
Gain (loss)	9.8	(21.0)
Reclassification realized in net earnings	14.3	20.6
Ending Balance	$ (62.9)	$ (87.0)