Goodwill and Intangible Assets (Schedule Of Expected Annual Amortization Expense Related To Intangible Assets For The Next Five Years) (Details) $ in Millions	Dec. 27, 2019 USD ($)
Expected Annual Amortization Expense related to intangible assets for the next five years [Line Items]
Remaining 2019	$ 33.0
2020	16.6
2021	5.1
2022	1.1
2023	1.1
Thereafter	3.7
Cost of sales [Member]
Expected Annual Amortization Expense related to intangible assets for the next five years [Line Items]
Remaining 2019	15.6
2020	4.9
2021	0.9
2022	1.0
2023	1.0
Thereafter	1.9
Operating Expense [Member]
Expected Annual Amortization Expense related to intangible assets for the next five years [Line Items]
Remaining 2019	17.4
2020	11.7
2021	4.2
2022	0.1
2023	0.1
Thereafter	$ 1.8