Stock-Based Compensation Expense (Details Textual) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Apr. 01, 2012	Apr. 03, 2011
Employee Stock Purchase Plan [Member]
Stock-Based Compensation Expense (Textual) [Abstract]
Shares of common stock issued under the ESPP	0	0
Performance-based Restricted Stock Units [Member]
Stock-Based Compensation Expense (Textual) [Abstract]
Total unrecognized compensation expense related to performance based awards, net of estimated forfeitures	36.3
Total fair value of shares vested	12.3	6.3
Recognition period for unrecognized compensation expense related to RSU's, net of estimated forfeitures	3
Grant date fair value of RSU's granted, Total	25.1	26.1
Stock based compensation expense related to additional vesting	4.4
Stock Based Compensation Expense Related To Change In Estimate	2.4
Vesting period of performance-based RSU's held by executive officers	3 years
Service-based Restricted Stock Units [Member]
Stock-Based Compensation Expense (Textual) [Abstract]
Total unrecognized compensation expense related to unvested stock options, net of estimated forfeitures	104.0
Total fair value of shares vested	22.0	10.3
Recognition period for unrecognized compensation expense related to service-based RSU's, net of estimated forfeitures	3.1
Grant date fair value of RSU's granted, Total	54.2	46.4
SandForce Acquisition [Member]
Stock-Based Compensation Expense (Textual) [Abstract]
Expenses related to accelerated vesting of stock options and restricted stock units assumed	2.4
Vesting period of related stock options	4 years
Terms of related stock options	10 years
Expenses related to accelerated vesting of stock options and restricted stock units for certain employees	4.5
Common shares reserved for future issuance upon exercise of outstanding options and RSU's assumed from acquisitions, shares	9,117,372
Vesting period of related RSU's, Minimum	2 years
Vesting period of related RSU's, Maximum	4 years