Stock-Based Compensation (Schedule Of Activity Under Option Plans) (Details) (USD $)	3 Months Ended	12 Months Ended
	Mar. 28, 2015	Dec. 27, 2014
Stock-Based Compensation [Abstract]
Outstanding beginning balance, Number of options	18,316,720
Granted and Assumed, Number of options	30,000
Exercised, Number of options	(3,123,174)
Forfeited, Number of options	(3,802)
Expired, Number of options	(282,241)
Outstanding ending balance, Number of options	14,937,503	18,316,720
Vested & expected to vest, Number of options	14,753,970
Exercisable ending balance, Number of options	13,222,348
Outstanding beginning balance, Weighted average exercise price per share	$ 7.53
Granted and Assumed, Weighted average exercise price per share	$ 8.88
Exercised, Weighted average exercise price per share	$ 6.82
Forfeited, Weighted average exercise price per share	$ 6.83
Expired, Weighted average exercise price per shre	$ 10.51
Outstanding ending balance, Weighted average exercise price per share	$ 7.63	$ 7.53
Vested & expected to vest, Weighted average exercise price per share	$ 7.64
Exercisable ending balance, Weighted average exercise price per share	$ 7.76
Outstanding ending balance, Weighted average remaining contractual term (years)	4 years 5 months 27 days	4 years 4 months 28 days
Vested & expected to vest, Weighted average remaining contractual term (years)	4 years 5 months 5 days
Exercisable ending balance, Weighted average remaining contractual term (years)	3 years 11 months 19 days
Outstanding beginning balance, Aggregate intrinsic value	$ 32,598,999
Outstanding ending balance, Aggregate intrinsic value	27,621,695	32,598,999
Vested & expected to vest, Aggregate intrinsic value	27,155,342
Exercisable ending balance, Aggregate intrinsic value	$ 22,969,577