Consolidated Statements of Stockholders' Equity (USD $) In Millions	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Equity Securities	Hedging Transactions	Pension	Treasury Stock
Beginning Balance at Dec. 26, 2010	$ 1,176.3	$ 1.3	$ 1,432.4	$ (187.5)	$ (7.3)	$ 2.5	$ (0.8)	$ (64.3)
Beginning Balance (in shares) at Dec. 26, 2010		124.5
Net income	145.5			145.5
Exercise or settlement of plan awards (in shares)		4.1
Exercise or settlement of plan awards	35.5		35.5
Stock-based compensation expense	24.8		24.8
Purchase of treasury stock (in shares)		(2.8)
Purchase of treasury stock	(42.3)							(42.3)
Cash flow hedges	(7.9)					(7.9)
Unrealized holding loss on marketable securities	1.6				1.6
Pension transactions	(0.5)						(0.5)
Shares withheld for employee taxes	(10.8)		(10.8)
Ending Balance at Dec. 25, 2011	1,322.2	1.3	1,481.9	(42.0)	(5.7)	(5.4)	(1.3)	(106.6)
Ending Balance (in shares) at Dec. 25, 2011		125.8
Net income	24.6			24.6
Exercise or settlement of plan awards (in shares)		2.2
Exercise or settlement of plan awards	5.1	0.1	5.0
Stock-based compensation expense	22.9		22.9
Purchase of treasury stock (in shares)	(10.0)	(1.1)
Purchase of treasury stock	(13.9)							(13.9)
Cash flow hedges	12.6					12.6
Net amount reclassified to earnings for sale of marketable securities	10.4				10.4
Unrealized holding loss on marketable securities	(4.4)				(4.4)
Pension transactions	(1.1)						(1.1)
Shares withheld for employee taxes	(10.7)		(10.7)
Temporary equity reclassification, deferred stock units	(0.6)		(0.6)
Ending Balance at Dec. 30, 2012	1,367.1	1.4	1,498.5	(17.4)	0.3	7.2	(2.4)	(120.5)
Ending Balance (in shares) at Dec. 30, 2012		126.9
Net income	5.0			5.0
Exercise or settlement of plan awards (in shares)		1.6
Exercise or settlement of plan awards	1.4		1.4
Stock-based compensation expense	27.9		27.9
Purchase of treasury stock (in shares)	(12.3)	(2.3)
Purchase of treasury stock	(28.9)							(28.9)
Cash flow hedges	(2.8)					(2.8)
Unrealized holding loss on marketable securities	(0.2)				(0.2)
Pension transactions	1.0						1.0
Shares withheld for employee taxes	(9.3)		(9.3)
Temporary equity reclassification, deferred stock units	(0.7)		(0.7)
Ending Balance at Dec. 29, 2013	$ 1,360.5	$ 1.4	$ 1,517.8	$ (12.4)	$ 0.1	$ 4.4	$ (1.4)	$ (149.4)
Ending Balance (in shares) at Dec. 29, 2013		126.2