Shareholders' Equity (Share Repurchases) (Details) - USD ($) $ in Thousands, shares in Millions	12 Months Ended
	Dec. 30, 2015	Dec. 31, 2014	Dec. 25, 2013
Equity, Class of Treasury Stock [Line Items]
Common stock shares repurchased during the period (shares)	8.5	5.3	4.2
Common stock shares repurchased during the period (value in US$)	$ 92,676	$ 35,990	$ 24,698
Share Repurchase Program 2015 [Member]
Equity, Class of Treasury Stock [Line Items]
Share repurchase, authorized amount (dollars)	100,000
Remaining shares to be repurchase (value in US$)	$ 37,800
Share Repurchase Program 2013 [Member]
Equity, Class of Treasury Stock [Line Items]
Number of shares approved under stock repurchase program (shares)	10.0
Share Repurchase Program 2012 [Member]
Equity, Class of Treasury Stock [Line Items]
Number of shares approved under stock repurchase program (shares)	6.0
November 2015 Accelerated Share Repurchase [Member]
Equity, Class of Treasury Stock [Line Items]
Share repurchase, authorized amount (dollars)	$ 50,000
Common stock shares repurchased during the period (shares)	3.5
Common stock shares repurchased during the period (value in US$)	$ 36,900
Remaining shares to be repurchase (value in US$)	$ 13,100