Stock-Based Compensation (Details 2) (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 03, 2012 Y	Jun. 28, 2011 Y	Jul. 03, 2012 Y	Jun. 28, 2011
Restricted Shares and Restricted Share Units
Outstanding at the end of the period (in shares)	1,100	700	1,100	700
Stock options
Stock-Based Compensation
Weighted average fair value at the grant date for options issued (in dollars per share)	$ 12.34	$ 12.11
Weighted average assumptions under Black-Scholes valuation model
Expected stock price volatility (as a percent)	39.80%	39.00%
Risk free interest rate (as a percent)	1.10%	2.00%
Expected option term (in years)	6.1	6.0
Stock option activity, shares
Outstanding, at the beginning of the period (in shares)			8,827
Granted (in shares)			482
Exercised (in shares)			(833)
Forfeited or cancelled (in shares)			(109)
Outstanding at the end of the period (in shares)	8,367		8,367
Exercisable at the end of the period (in shares)	4,430		4,430
Weighted Average Exercise price
Outstanding at the beginning of the period (in dollars per share)			$ 23.51
Granted (in dollars per share)	$ 29.30		$ 29.30
Exercised (in dollars per share)	$ 21.51		$ 21.51
Forfeited or cancelled (in dollars per share)	$ 23.22		$ 23.22
Outstanding at the end of the period (in dollars per share)	$ 24.05		$ 24.05
Exercisable at the end of the period (in dollars per share)	$ 27.30		$ 27.30
Weighted Average Remaining Contractual Term
Outstanding at the beginning of the period (in years)			4.8
Outstanding at the end of the period (in years)	4.6		4.6
Exercisable at the end of the period (in years)			3.6
Aggregate Intrinsic Value
Outstanding at the beginning of the period			$ 58,857,000
Outstanding at the end of the period	70,559,000		70,559,000
Exercisable at the end of the period	24,010,000		24,010,000
Total intrinsic value of options exercised	3,700,000	2,300,000	8,100,000	3,700,000
Unrecognized Stock-based Compensation Expense
Total unrecognized stock-based compensation expenses related to unvested stock option	18,800,000		18,800,000
Expected weighted average period for recognition of compensation expense related to nonvested stock option (in years)			2.4
Restricted Shares and Restricted Share Units
Unrecognized Stock-based Compensation Expense
Total unrecognized stock-based compensation expenses related to unvested stock option	19,900,000		19,900,000
Expected weighted average period for recognition of compensation expense related to nonvested stock option (in years)			3.8
Restricted Shares and Restricted Share Units
Outstanding at the beginning of the period (in shares)			826
Granted (in shares)			420
Vested (in shares)			(175)
Forfeited (in shares)			(7)
Outstanding at the end of the period (in shares)	1,064		1,064
Fair value of shares vested	$ 1,200,000	$ 800,000	$ 2,400,000	$ 900,000
Weighted Average Fair Value
Outstanding at the beginning of the period (in dollars per share)			$ 20.40
Granted (in dollars per share)	$ 31.08	$ 29.86	$ 29.88
Vested (in dollars per share)			$ 13.98
Forfeited (in dollars per share)	$ 19.59		$ 19.59
Outstanding at the end of the period (in dollars per share)	$ 25.20		$ 25.20