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Certain Balance Sheet Components (Components Of Other Non-Current Liabilities) (Details) - USD ($)
$ in Millions
Dec. 30, 2016
Jan. 01, 2016
Balance Sheet Related Disclosures [Abstract]    
Deferred compensation $ 22.6 $ 21.1
Pension 13.1 13.5
Deferred rent 3.3 3.0
Unrecognized tax benefits 65.3 53.1
Other 9.5 15.8
Total $ 113.8 $ 106.5