Stockholders' Equity (Schedule of accumulated other income income (loss)) (Details) - USD ($) $ in Millions	Nov. 29, 2015	May. 31, 2015
Accumulated Other Comprehensive Loss Net Of Tax [Abstract]
Foreign currency translation adjustments	$ (709.3)	$ (536.6)
Unrealized gain (loss) from:
Securities	3.7	3.7
Hedge derivatives	(19.2)	(28.8)
Pension, other postretirement, and postemployment benefits:
Net actuarial gain (loss)	(1,694.8)	(1,756.1)
Prior service costs	12.6	7.1
Accumulated other comprehensive loss	$ (2,407.0)	$ (2,310.7)