Business Acquisitions (Schedule of Purchased Intangible Assets) (Details) - USD ($) $ in Thousands			6 Months Ended
	Apr. 04, 2016	Aug. 03, 2015	Sep. 30, 2016
Atmel Corporation
Business Acquisition [Line Items]
Useful Life	9 years
Purchased Intangible Assets	$ 1,877,945
Atmel Corporation | Core/developed technology
Business Acquisition [Line Items]
Useful Life	11 years		11 years
Purchased Intangible Assets	$ 1,076,540		$ 1,076,500
Atmel Corporation | In-process technology
Business Acquisition [Line Items]
Purchased Intangible Assets	$ 140,700		$ 140,700
Atmel Corporation | Customer-related
Business Acquisition [Line Items]
Useful Life	6 years		6 years
Purchased Intangible Assets	$ 630,600		$ 630,600
Atmel Corporation | Backlog
Business Acquisition [Line Items]
Useful Life	1 year		1 year
Purchased Intangible Assets	$ 28,300		$ 28,300
Atmel Corporation | Other
Business Acquisition [Line Items]
Useful Life	5 years		5 years
Purchased Intangible Assets	$ 1,805		$ 1,800
Micrel Incorporated
Business Acquisition [Line Items]
Purchased Intangible Assets		$ 273,500
Micrel Incorporated | Core/developed technology
Business Acquisition [Line Items]
Useful Life		10 years
Purchased Intangible Assets		$ 175,800
Micrel Incorporated | In-process technology
Business Acquisition [Line Items]
Purchased Intangible Assets		$ 21,000
Micrel Incorporated | Customer-related
Business Acquisition [Line Items]
Useful Life		5 years
Purchased Intangible Assets		$ 71,100
Micrel Incorporated | Backlog
Business Acquisition [Line Items]
Useful Life		1 year
Purchased Intangible Assets		$ 5,600