Goodwill and Intangible Assets (Schedule Of Expected Annual Amortization Expense Related To Intangible Assets For The Next Five Years) (Details) $ in Millions	Dec. 28, 2018 USD ($)
Finite-Lived Intangible Assets [Line Items]
Remaining 2019	$ 33.8
Finite-Lived Intangible Assets, Amortization Expense, Year Two	34.3
Finite-Lived Intangible Assets, Amortization Expense, Year Three	9.1
Finite-Lived Intangible Assets, Amortization Expense, Year Four	1.1
Finite-Lived Intangible Assets, Amortization Expense, Year Five	1.1
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	4.7
Operating Expense [Member]
Finite-Lived Intangible Assets [Line Items]
Remaining 2019	15.7
Finite-Lived Intangible Assets, Amortization Expense, Year Two	12.4
Finite-Lived Intangible Assets, Amortization Expense, Year Three	9.0
Finite-Lived Intangible Assets, Amortization Expense, Year Four	1.0
Finite-Lived Intangible Assets, Amortization Expense, Year Five	1.0
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	2.8
Cost of Sales [Member]
Finite-Lived Intangible Assets [Line Items]
Remaining 2019	18.1
Finite-Lived Intangible Assets, Amortization Expense, Year Two	21.9
Finite-Lived Intangible Assets, Amortization Expense, Year Three	0.1
Finite-Lived Intangible Assets, Amortization Expense, Year Four	0.1
Finite-Lived Intangible Assets, Amortization Expense, Year Five	0.1
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	$ 1.9