Reporting Segment And Geographic Information (Schedule Of Revenue From Customers) (Details) - USD ($)		3 Months Ended								12 Months Ended
		Jan. 01, 2016	Oct. 02, 2015	Jul. 03, 2015	Apr. 03, 2015	Jan. 02, 2015	Oct. 03, 2014	Jul. 04, 2014	Apr. 04, 2014	Jan. 01, 2016		Jan. 02, 2015		Jan. 03, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues		$ 559,700,000	$ 562,300,000	$ 585,800,000	$ 582,600,000	$ 563,800,000	$ 584,800,000	$ 642,200,000	$ 604,700,000	$ 2,290,400,000	[1]	$ 2,395,500,000	[1]	$ 2,288,100,000	[1]
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	[1]									1,142,100,000		1,147,700,000		1,131,200,000
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	[1]									557,200,000		581,700,000		535,600,000
Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	[1]									321,100,000		345,600,000		317,200,000
Other Non-US Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	[1]									270,000,000		320,500,000		304,100,000
Advanced Devices [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues										$ 131,500,000		138,500,000		127,100,000
Advanced Devices [Member] | Sales Revenue, Net [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration Risk, Percentage										10.00%
Ten Percent Customer member [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues										$ 0		$ 0		$ 0
Ten Percent Customer member [Member] | Sales Revenue, Net [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration Risk, Percentage										10.00%		10.00%		10.00%
Ten Percent Accounts Receivable member [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues										$ 0		$ 0
Ten Percent Accounts Receivable member [Member] | Accounts Receivable [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration Risk, Percentage										10.00%		10.00%

[1] Revenue is attributed to countries based on the location of the customer.