Stock-Based Compensation Plans (Details Textual) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended	3 Months Ended		9 Months Ended			6 Months Ended					3 Months Ended		9 Months Ended
	Dec. 31, 2011	Jan. 01, 2011	Dec. 31, 2011	Jan. 01, 2011	Apr. 02, 2011	Dec. 31, 2011 Employee Stock Option [Member]	Jan. 01, 2011 Employee Stock Option [Member]	Dec. 31, 2011 Employee Stock Option [Member]	Jan. 01, 2011 Employee Stock Option [Member]	Aug. 10, 2011 Employee Stock [Member]	Oct. 01, 2011 Employee Stock Purchase Plan [Member]	Oct. 02, 2010 Employee Stock Purchase Plan [Member]	Dec. 31, 2011 Employee Stock Purchase Plan [Member]	Aug. 10, 2011 Employee Stock Purchase Plan [Member]	Dec. 31, 2011 Equity Plan 2007 [Member]	Dec. 31, 2011 Restricted Stock Units [Member]	Jan. 01, 2011 Restricted Stock Units [Member]	Dec. 31, 2011 Restricted Stock Units [Member]	Jan. 01, 2011 Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant													8,900,000		15,700,000
Weighted average fair value per share of stock options granted						$ 7.95	$ 6.53	$ 7.89	$ 6.70
Weighted average fair value per share of RSUs and stock purchase rights granted			$ 33.89		$ 25.14						$ 9.37	$ 7.82				$ 29.47	$ 26.09	$ 33.89	$ 24.05
Authorized number of shares reserved for issuance										4,500,000				2,000,000
Total price of shares purchased under ESPP											$ 13,300,000	$ 13,900,000
Shares issued during the period											501,000	958,000
Stock- Based Compensation Plans (Textual) [Abstract]
Tax benefit realized for the tax deduction from option exercises and other awards			7,039,000	385,000
Total intrinsic value of options exercised	$ 3,900,000	$ 4,100,000	$ 22,200,000	$ 10,500,000