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Income Taxes (Reconciliation Of Unrecognized Tax Benefits) (Details)
$ in Millions
12 Months Ended
May 28, 2017
USD ($)
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]  
Beginning balance $ 14.3
Additions related to current-year tax positions 4.6
Reductions due to settlements with taxing authorities (0.2)
Reductions to tax positions due to statute expiration (2.3)
Ending balance $ 16.4