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Certain Balance Sheet Components (Components Of Net Inventories) (Details) - USD ($)
$ in Millions
Dec. 28, 2018
Dec. 29, 2017
Dec. 30, 2016
Balance Sheet Related Disclosures [Abstract]      
Raw materials $ 96.2 $ 85.2  
Work-in-process 12.6 12.4  
Finished goods 189.2 167.0  
Total inventories 298.0 264.6 [1] $ 213.3
Deferred Costs, Current $ 7.3 $ 8.7  
[1] See Note 2 for a summary of adjustments