Revenue and Segment Information (Revenues By Geographic Location Including Local Sales And Exports) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Revenue from external customers	$ 5,878.3	$ 5,543.1	$ 3,906.9
OEM
Segment Reporting Information [Line Items]
Revenue from external customers	1,970.9
Distributors
Segment Reporting Information [Line Items]
Revenue from external customers	3,541.7
Electronic Manufacturing Service Providers
Segment Reporting Information [Line Items]
Revenue from external customers	365.7
Singapore
Segment Reporting Information [Line Items]
Revenue from external customers	1,955.0
Hong Kong
Segment Reporting Information [Line Items]
Revenue from external customers	1,489.1
United Kingdom
Segment Reporting Information [Line Items]
Revenue from external customers	946.5
United States
Segment Reporting Information [Line Items]
Revenue from external customers	862.7
Other
Segment Reporting Information [Line Items]
Revenue from external customers	625.0
Power Solutions Group
Segment Reporting Information [Line Items]
Revenue from external customers	3,038.2	2,819.3	1,708.6
Power Solutions Group | OEM
Segment Reporting Information [Line Items]
Revenue from external customers	846.8
Power Solutions Group | Distributors
Segment Reporting Information [Line Items]
Revenue from external customers	2,011.1
Power Solutions Group | Electronic Manufacturing Service Providers
Segment Reporting Information [Line Items]
Revenue from external customers	180.3
Power Solutions Group | Singapore
Segment Reporting Information [Line Items]
Revenue from external customers	1,086.6
Power Solutions Group | Hong Kong
Segment Reporting Information [Line Items]
Revenue from external customers	847.9
Power Solutions Group | United Kingdom
Segment Reporting Information [Line Items]
Revenue from external customers	488.5
Power Solutions Group | United States
Segment Reporting Information [Line Items]
Revenue from external customers	398.5
Power Solutions Group | Other
Segment Reporting Information [Line Items]
Revenue from external customers	216.7
Analog Solutions Group
Segment Reporting Information [Line Items]
Revenue from external customers	2,071.2	1,950.9	1,481.5
Analog Solutions Group | OEM
Segment Reporting Information [Line Items]
Revenue from external customers	860.7
Analog Solutions Group | Distributors
Segment Reporting Information [Line Items]
Revenue from external customers	1,066.4
Analog Solutions Group | Electronic Manufacturing Service Providers
Segment Reporting Information [Line Items]
Revenue from external customers	144.1
Analog Solutions Group | Singapore
Segment Reporting Information [Line Items]
Revenue from external customers	704.2
Analog Solutions Group | Hong Kong
Segment Reporting Information [Line Items]
Revenue from external customers	496.5
Analog Solutions Group | United Kingdom
Segment Reporting Information [Line Items]
Revenue from external customers	319.8
Analog Solutions Group | United States
Segment Reporting Information [Line Items]
Revenue from external customers	339.2
Analog Solutions Group | Other
Segment Reporting Information [Line Items]
Revenue from external customers	211.5
Intelligent Sensing Group
Segment Reporting Information [Line Items]
Revenue from external customers	768.9	$ 772.9	$ 716.8
Intelligent Sensing Group | OEM
Segment Reporting Information [Line Items]
Revenue from external customers	263.4
Intelligent Sensing Group | Distributors
Segment Reporting Information [Line Items]
Revenue from external customers	464.2
Intelligent Sensing Group | Electronic Manufacturing Service Providers
Segment Reporting Information [Line Items]
Revenue from external customers	41.3
Intelligent Sensing Group | Singapore
Segment Reporting Information [Line Items]
Revenue from external customers	164.2
Intelligent Sensing Group | Hong Kong
Segment Reporting Information [Line Items]
Revenue from external customers	144.7
Intelligent Sensing Group | United Kingdom
Segment Reporting Information [Line Items]
Revenue from external customers	138.2
Intelligent Sensing Group | United States
Segment Reporting Information [Line Items]
Revenue from external customers	125.0
Intelligent Sensing Group | Other
Segment Reporting Information [Line Items]
Revenue from external customers	$ 196.8