Intangible Assets, by Major Class (Details) - USD ($) $ in Thousands			3 Months Ended
	Apr. 04, 2016	Aug. 03, 2015	Jun. 30, 2016	Jun. 30, 2015	Mar. 31, 2016
Finite-Lived Intangible Assets, Net [Abstract]
Gross Amount			$ 2,954,198		$ 1,075,013
Accumulated Amortization			(550,841)		(468,664)
Net Amount			2,403,357		606,349
In-process technology reaching technological feasibility and reclassified			8,900
Amortization of Intangible Assets			82,500	$ 35,700
Impairment of Intangible Assets			1,984	0
Projected Amortization Expense
Future Amortization Expense, Remainder of Fiscal Year			253,615
Future Amortization Expense, Year Two			445,471
Future Amortization Expense, Year Three			363,978
Future Amortization Expense, Year Four			314,257
Future Amortization Expense, Year Five			288,469
Core and developed technology [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Gross Amount			1,813,105		724,883
Accumulated Amortization			(301,019)		(255,460)
Net Amount			1,512,086		469,423
Customer-related [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Gross Amount			907,742		278,542
Accumulated Amortization			(229,241)		(200,331)
Net Amount			678,501		78,211
Trademarks and trade names [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Gross Amount			11,700		11,700
Accumulated Amortization			(8,088)		(7,571)
Net Amount			3,612		4,129
Backlog [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Gross Amount			28,700
Accumulated Amortization			(7,075)
Net Amount			21,625
In-process technology [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Gross Amount			185,566		54,308
Accumulated Amortization			0		0
Net Amount			185,566		54,308
Distribution rights [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Gross Amount			5,580		5,580
Accumulated Amortization			(5,313)		(5,302)
Net Amount			267		$ 278
Other Intangible Assets [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Gross Amount			1,805
Accumulated Amortization			(105)
Net Amount			$ 1,700
Minimum [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Useful Life			1 year
Minimum expected useful life of finite lived intangible assets (in years)			1 year
Maximum [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Useful Life			15 years
Minimum expected useful life of finite lived intangible assets (in years)			15 years
Atmel Corporation [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Purchased Intangible Assets	$ 1,880,245
Atmel Corporation [Member] | Core and developed technology [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Purchased Intangible Assets	$ 1,080,340		$ 1,080,300
Useful Life	11 years		11 years
Minimum expected useful life of finite lived intangible assets (in years)	11 years		11 years
Atmel Corporation [Member] | Customer-related [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Purchased Intangible Assets	$ 629,200		$ 629,200
Useful Life	6 years		6 years
Minimum expected useful life of finite lived intangible assets (in years)	6 years		6 years
Atmel Corporation [Member] | Backlog [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Purchased Intangible Assets	$ 28,700		$ 28,700
Useful Life	1 year		1 year
Minimum expected useful life of finite lived intangible assets (in years)	1 year		1 year
Atmel Corporation [Member] | In-process technology [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Purchased Intangible Assets	$ 140,200		$ 140,200
Atmel Corporation [Member] | Other Intangible Assets [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Purchased Intangible Assets	$ 1,805		$ 1,800
Useful Life	5 years		5 years
Minimum expected useful life of finite lived intangible assets (in years)	5 years		5 years
Micrel Incorporated [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Purchased Intangible Assets		$ 273,500
Micrel Incorporated [Member] | Core and developed technology [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Purchased Intangible Assets		$ 175,800
Useful Life		10 years
Minimum expected useful life of finite lived intangible assets (in years)		10 years
Micrel Incorporated [Member] | Customer-related [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Purchased Intangible Assets		$ 71,100
Useful Life		5 years
Minimum expected useful life of finite lived intangible assets (in years)		5 years
Micrel Incorporated [Member] | Backlog [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Purchased Intangible Assets		$ 5,600
Useful Life		1 year
Minimum expected useful life of finite lived intangible assets (in years)		1 year
Micrel Incorporated [Member] | In-process technology [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Purchased Intangible Assets		$ 21,000
Cost of Sales
Finite-Lived Intangible Assets, Net [Abstract]
Amortization of Intangible Assets			$ 900	900
Operating Expense [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Amortization of Intangible Assets			$ 81,600	$ 34,800