Share-based Compensation (Details 3) (USD $)	12 Months Ended
	Dec. 25, 2012	Dec. 27, 2011	Dec. 28, 2010
Aggregate Intrinsic Value
Cash received before tax withholdings from options exercised	$ 10,700,000	$ 5,000,000	$ 11,000,000
Excess tax benefit realized from tax deductions associated with options exercised	3,600,000	2,300,000	3,200,000
Stock Options
Shares
Outstanding at the beginning of the period (in shares)	3,486,642
Forfeited (in shares)	(112,471)
Exercised (in shares)	(1,115,250)
Outstanding at the end of the period (in shares)	2,258,921	3,486,642
Exercisable at the end of period (in shares)	2,258,921
Weighted-Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 12.02
Forfeited (in dollars per share)	$ 11.74
Exercised (in dollars per share)	$ 9.57
Outstanding at the end of the period (in dollars per share)	$ 13.24	$ 12.02
Exercisable at the end of the period (in dollars per share)	$ 13.24
Weighted-Average Remaining Contractual Term
Outstanding at the end of the period	2 years 11 months 26 days
Exercisable at the end of the period	2 years 11 months 26 days
Aggregate Intrinsic Value
Outstanding at the end of the period (in dollars)	8,613,000
Exercisable at the end of the period (in dollars)	8,613,000
Intrinsic value of options exercised (in dollars)	8,700,000	3,000,000	9,600,000
Total grant date fair value of options vested (in dollars)	$ 200,000	$ 700,000	$ 1,300,000