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Restructuring Initiatives (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended
Aug. 26, 2018
Aug. 27, 2017
Restructuring and Related Cost [Line Items]    
Restructuring charges (recoveries) $ (1.2) $ 17.5
Cash payments for restructuring 17.7 26.7
Payments for other project-related costs 0.3 2.7
Restructuring actions previously announced [Member]    
Restructuring and Related Cost [Line Items]    
Restructuring charges (recoveries) (1.2) $ 17.5
Net restructuring charges 2.8  
Reduction in restructuring charges $ 4.0