Segment Information (Segment Information Of Revenues, Gross Profit And Operating Income) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jul. 01, 2016	Apr. 01, 2016	Dec. 31, 2015	Oct. 02, 2015	Jul. 03, 2015	Apr. 03, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Revenues from external customers	$ 1,261.0	$ 950.9	$ 877.8	$ 817.2	$ 840.3	$ 904.2	$ 880.5	$ 870.8	$ 3,906.9	$ 3,495.8	$ 3,161.8
Segment gross profit									1,391.8	1,209.0	1,118.3
Power Solutions Group [Member]
Segment Reporting Information [Line Items]
Revenues from external customers									1,708.6	1,409.9	1,423.5
Segment gross profit									566.3	428.7	446.8
Analog Solutions Group [Member]
Segment Reporting Information [Line Items]
Revenues from external customers									1,481.5	1,338.6	1,415.8
Segment gross profit									589.0	537.9	574.5
Image Sensor Group [Member]
Segment Reporting Information [Line Items]
Revenues from external customers									716.8	747.3	322.5
Segment gross profit									$ 236.5	$ 242.4	$ 97.0