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Income Taxes (Reconciliation Of Unrecognized Tax Benefits) (Details)
$ in Millions
12 Months Ended
May 27, 2018
USD ($)
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]  
Beginning balance $ 16.4
Additions related to current-year tax positions 4.5
Reductions due to settlements with taxing authorities (0.5)
Reductions to tax positions due to statute expiration (3.0)
Ending balance $ 17.4