Share-Based Compensation (Details) - USD ($) $ in Thousands			3 Months Ended
		Apr. 04, 2016	Jun. 30, 2016	Jun. 30, 2015
Stock-based compensation expense [Line Items]
Allocated Share-based Compensation Expense			$ 59,579	$ 14,112
Share-based Compensation Expense Previously Capitalized	[1]		3,700
Income tax benefit			20,888	3,532
Net income effect of share-based compensation			38,691	10,580
Inventory
Stock-based compensation expense [Line Items]
Amount of share-based compensation expense capitalized to inventory			2,800	1,800
Cost of Sales
Stock-based compensation expense [Line Items]
Allocated Share-based Compensation Expense	[1]		7,897	1,657
Research and development
Stock-based compensation expense [Line Items]
Allocated Share-based Compensation Expense			17,517	7,098
Selling, General and Administrative
Stock-based compensation expense [Line Items]
Allocated Share-based Compensation Expense			34,165	$ 5,357
Atmel Corporation [Member]
Stock-based compensation expense [Line Items]
Allocated Share-based Compensation Expense	[1]		43,200
Business Combination Fair Value of Assumed Awards at Acquisition Date		$ 95,900
Non cash consideration of certain share-based payment awards		7,500
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized		$ 88,400
Share-based Compensation Arrangement by Share-based Payment Award Accelerated Compensation Cost			37,100
Atmel Corporation [Member] | Cost of Sales
Stock-based compensation expense [Line Items]
Allocated Share-based Compensation Expense	[1]		$ 4,200

[1] During the three months ended June 30, 2016, $2.8 million of share-based compensation expense was capitalized to inventory. The amount of share-based compensation included in cost of sales during the three months ended June 30, 2016, included $3.7 million of previously capitalized share-based compensation expense in inventory that was sold and $4.2 million of share-based compensation expense related to the Company's acquisition of Atmel that was not previously capitalized to inventory. During the three months ended June 30, 2015, $1.8 million of share-based compensation expense was capitalized to inventory and $1.7 million of previously capitalized share-based compensation expense in inventory was sold.