Deferred Income and Allowances on Sales to Distributors (Details) - USD ($) $ in Thousands		6 Months Ended
		Jun. 26, 2015	Jun. 27, 2014	Dec. 31, 2014
Deferred Income and Allowances on Sales to Distributors
Deferred revenue on shipment to distributors		$ 421,174		$ 369,560
Deferred cost of sales on shipment to distributors		(32,113)		(32,172)
Deferred income on shipment to distributors		389,061		337,388
Other deferred revenue	[1]	5,860		6,780
Total		394,921		$ 344,168
Deferred Income and Allowances on Sales to Distributor Activity
Balance at beginning of period		344,168	$ 487,746
Deferred revenue recognized upon shipment to distributors		3,031,752	2,853,749
Deferred cost of sales recognized upon shipment to distributors		(143,573)	(134,974)
Revenue recognized upon sell-through to end customers		(535,018)	(559,914)
Cost of sales recognized upon sell-through to end customers		142,606	133,531
Earned distributor price concessions	[2]	(2,422,463)	(2,329,017)
Returns		(21,671)	(35,866)
Other		(880)	(56)
Balance at end of period		$ 394,921	$ 415,199
Deferred Income and Allowances on Sales to Distributors Textuals [Abstract]
Minimum percentage of average aggregate price concessions on list price		70.00%
Maximum percentage of average aggregate price concessions on list price		85.00%
Maximum time period to submit claim for receiving price concession, days		60 days
Period of settlement for receivable balances, days		30 days

[1] Principally represents revenue deferred on our maintenance contracts, software and intellectual property licenses.

[2] Average aggregate price concessions typically range from 70% to 85% of our list price on an annual basis, depending upon the composition of our sales, volumes and factors associated with timing of shipments to distributors.