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Summary Of Significant Accounting Policies (Capitalized Software Costs And Related Accumulated Amortization) (Details) - USD ($)
$ in Millions
May 28, 2017
May 29, 2016
Accounting Policies [Abstract]    
Capitalized software $ 190.1 $ 169.7
Accumulated amortization (108.2) (93.1)
Capitalized software, net of accumulated amortization $ 81.9 $ 76.6