Acquisitions (Details) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 28, 2013	Dec. 29, 2012	Jun. 29, 2013 acquisitions
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%		100.00%
Business Acquisition, Share Price	$ 23		$ 23
Business Combination, Acquisition Related Costs	$ 4,137,000	$ 0	$ 7,071,000	$ 0
Number of Businesses Acquired					0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Goodwill	596,898,000		596,898,000		422,004,000
Volterra [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition	Oct. 01, 2013
Payments to Acquire Businesses, Gross			593,250,000
Business Acquisition, Cash Paid for Employee's Vested Options			21,756,000
Business Combination, Consideration Transferred			615,006,000
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual			35,000,000
Business Combination, Acquisition Related Costs			7,071,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Business Combination, Cash and Equivalents	163,500,000		163,500,000
Business Combination, Receivables	23,453,000		23,453,000
Business Combination, Inventory	33,339,000		33,339,000
Business Combination, Other Noncurrent Assets	17,151,000		17,151,000
Business Combination, Accrued Liabilities	(35,343,000)		(35,343,000)
Business Combination, Income Tax Payable	(23,241,000)		(23,241,000)
Business Combination, Current Liabilities, Other	(20,149,000)		(20,149,000)
Business Combination, Assets Acquired and Liabilities Assumed, Net	158,710,000		158,710,000
Business Combination, Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	226,900,000		226,900,000
Business Combination, Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets	56,200,000		56,200,000
Goodwill	174,894,000		174,894,000
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable			(1,698,000)
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	615,006,000		615,006,000
Volterra [Member] | Intellectual property [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			4 years 10 months 24 days
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Business Combination, Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	192,500,000		192,500,000
Volterra [Member] | Customer relationships [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			9 years 7 months 6 days
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Business Combination, Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	24,600,000		24,600,000
Volterra [Member] | Tradename [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			4 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Business Combination, Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	6,400,000		6,400,000
Volterra [Member] | Order or Production Backlog [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			4 months 24 days
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Business Combination, Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	900,000		900,000
Volterra [Member] | Patents [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			4 years 9 months 18 days
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Business Combination, Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 2,500,000		$ 2,500,000