Consolidated Statements of Stockholders' Equity and Comprehensive Income (Loss) Statement (USD $) In Millions, unless otherwise specified	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Common Stock Outstanding [Member]	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Loss
Beginning balance at Oct. 01, 2010	$ 1,316.7	$ 45.1	$ (40.7)	$ 1,641.4		$ (327.8)	$ (1.3)
Beginning balance (in shares) at Oct. 01, 2010			5.4
Common stock, shares, outstanding beginning balance (in shares) at Oct. 01, 2010		180.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	226.6					226.6
Exercise and settlement of share based awards and related tax benefit, net of shares withheld for taxes, shares		8.9	0.8
Exercise and settlement of share based awards and related tax benefit, net of shares withheld for taxes	79.8	2.2	(20.1)	97.7
Share-based Compensation expense	56.2			56.2
Share repurchase program (in shares)					(2.8)
Share repurchase program (in shares)			2.8
Share repurchase program	70.0		70.0	(0.7)	0.7
Ending balance at Sep. 30, 2011	1,609.3	46.6	(130.8)	1,796.0		(101.2)	(1.3)
Common stock, shares, outstanding ending balance (in shares) at Sep. 30, 2011		186.4
Ending balance (in shares) at Sep. 30, 2011			9.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	202.0					202.0
Exercise and settlement of share based awards and related tax benefit, net of shares withheld for taxes, shares		6.7	0.8
Exercise and settlement of share based awards and related tax benefit, net of shares withheld for taxes	56.5	1.7	(18.6)	73.4
Share-based Compensation expense	71.9			71.9
Reacquisition of equity components of convertible notes	(21.5)			(21.5)
Share repurchase program (in shares)					(0.8)
Share repurchase program (in shares)			0.8
Share repurchase program	12.4		12.4	(0.2)	0.2
Other comprehensive loss	(0.3)						(0.3)
Ending balance at Sep. 28, 2012	1,905.5	48.1	(161.8)	1,920.0		100.8	(1.6)
Common stock, shares, outstanding ending balance (in shares) at Sep. 28, 2012	192.3	192.3
Ending balance (in shares) at Sep. 28, 2012			10.6
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	278.1					278.1
Exercise and settlement of share based awards and related tax benefit, net of shares withheld for taxes, shares		3.7	0.9
Exercise and settlement of share based awards and related tax benefit, net of shares withheld for taxes	31.1	0.9	(18.6)	48.8
Share-based Compensation expense	70.6			70.6
Share repurchase program (in shares)					(8.1)
Share repurchase program (in shares)			8.1
Share repurchase program	184.9		184.9	(2.0)	2.0
Other comprehensive loss	0.7						0.7
Ending balance at Sep. 27, 2013	$ 2,101.1	$ 47.0	$ (365.3)	$ 2,041.4		$ 378.9	$ (0.9)
Common stock, shares, outstanding ending balance (in shares) at Sep. 27, 2013	187.9	187.9
Ending balance (in shares) at Sep. 27, 2013			19.6