Stock-Based Compensation (Details 2) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 25, 2011	Jun. 26, 2010	Jun. 25, 2011	Jun. 26, 2010
Stock-based compensation weighted-average assumptions
Expected life (in years)			4.2	4.5
Expected volatility (as a percent)			33.40%	34.00%
Risk-free interest rate (as a percent)			2.22%	2.35%
Expected dividend yield (as a percent)			0.00%	0.00%
Weighted-average grant date fair value (in dollars per share)			$ 11.35	$ 11.96
Restricted stock activity, additional disclosures
Compensation expense	$ 5,430	$ 7,712	$ 11,348	$ 14,568
Stock options.
Stock option activity, shares
Options outstanding, balance at the beginning of the period (in shares)			6,594,313
Options granted (in shares)			947,910
Options exercised (in shares)			(591,777)
Options canceled (in shares)			(472,605)
Options outstanding, balance at the end of the period (in shares)	6,477,841		6,477,841
Options exercisable, balance at the end of the period (in shares)	3,895,599		3,895,599
Stock option activity, weighted-average exercise price
Options outstanding, balance at the beginning of the period (in dollars per share)			$ 37.87
Options granted (in dollars per share)	$ 37.37		$ 37.37
Options exercised (in dollars per share)	$ 27.93		$ 27.93
Options canceled (in dollars per share)	$ 42.75		$ 42.75
Options outstanding, balance at the end of the period (in dollars per share)	$ 38.34		$ 38.34
Options exercisable, balance at the end of the period (in dollars per share)	$ 40.60		$ 40.60
Stock option activity, weighted-average remaining contractual life
Options outstanding, balance at the end of the period (in years)	4.09		4.09
Options exercisable, balance at the end of the period (in years)			3.04
Stock option activity, Aggregate Intrinsic Value
Options outstanding, balance at the end of the period	27,431		27,431
Options exercisable, balance at the end of the period	13,777		13,777
Stock option activity, additional disclosures
Number of unvested stock options expected to vest (in shares)	2,407,941		2,407,941
Intrinsic value of options exercised	4,583	653	6,711	1,141
Amount of cash received from exercise of options			12,713	2,659
Actual tax benefit realized for tax deductions from option exercises			2,465	342
Charge recorded in capital in excess of par value for excess of deferred tax assets over actual tax benefits at option exercise			362
Unrecognized compensation expense
Unrecognized compensation cost	22,830		22,830
Estimated weighted-average amortization period for unrecognized compensation cost (in months)			32
Restricted stock
Stock option activity, additional disclosures
Number of unvested stock options expected to vest (in shares)	672,490		672,490
Unrecognized compensation expense
Unrecognized compensation cost	21,783		21,783
Estimated weighted-average amortization period for unrecognized compensation cost (in months)			31
Restricted stock activity, restricted stock
Balance at the beginning of the period (in shares)			777,740
Granted (in shares)			283,450
Vested (in shares)			(291,942)
Canceled (in shares)			(51,159)
Balance at the end of the period (in shares)	718,089		718,089
Restricted stock activity, weighted average grant date fair value
Balance at the beginning of the period (in dollars per share)			$ 35.97
Granted (in dollars per share)			$ 37.29
Vested (in dollars per share)			$ 37.67
Canceled (in dollars per share)	$ 38.29		$ 38.29
Balance at the end of the period (in dollars per share)	$ 35.63		$ 35.63
Restricted stock activity, additional disclosures
Number of unvested restricted stock expected to vest (in shares)	672,490		672,490
Fair value of restricted stock grants that vested	861	890	10,997	9,994
Performance Based Stock Award Program
Restricted stock activity, additional disclosures
Compensation expense	$ 54	$ 105	$ 108	$ 286