Employee Stock Benefit Plans (Summary Of Share-Based Compensation Expense) (Details) (USD $) In Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2011		Oct. 01, 2010		Sep. 30, 2011		Oct. 01, 2010
Share-based compensation expenses	$ 6.0		$ 12.3		$ 26.9		$ 41.5
Share-based compensation expense before income taxes	6.0		12.3		26.9		41.5
Related income tax benefits	0	[1]	0	[1]	0	[1]	0	[1]
Share-based compensation expense, net of taxes	6.0		12.3		26.9		41.5
Cost Of Revenues [Member]
Share-based compensation expenses	1.3		4.5		4.9		11.1
Share-based compensation expense before income taxes	1.3		4.5		4.9		11.1
Research And Development [Member]
Share-based compensation expenses	1.6		2.8		5.5		8.1
Share-based compensation expense before income taxes	1.6		2.8		5.5		8.1
Selling And Marketing [Member]
Share-based compensation expenses	1.3		2.9		4.9		7.5
Share-based compensation expense before income taxes	1.3		2.9		4.9		7.5
General And Administrative [Member]
Share-based compensation expenses	1.8		2.0		11.6		14.3
Share-based compensation expense before income taxes	1.8		2.0		11.6		14.3
Restructuring [Member]
Share-based compensation expenses	0		0.1		0		0.5
Share-based compensation expense before income taxes	$ 0		$ 0.1		$ 0		$ 0.5

[1] Most of the Company’s share-based compensation relates to its domestic subsidiaries, which have historically experienced recurring net operating losses; therefore, no related tax benefits are recorded.