Computation of Net Loss Per Share (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 28, 2012		Sep. 30, 2011		Sep. 28, 2012		Sep. 30, 2011
Earnings Per Share Disclosure [Line Items]
Net loss	$ (3.9)		$ (130.1)		$ (148.4)		$ (183.5)
Denominator for basic net loss per share - weighted average shares outstanding	367.7		365.2		366.8		364.3
Employee stock options and restricted and performance stock awards
Denominator for diluted net loss per share - adjusted weighted average shares outstanding and assumed conversions	367.7		365.2		366.8		364.3
Net loss per share, basic	$ (0.01)		$ (0.36)		$ (0.40)		$ (0.50)
Net loss per share, diluted	$ (0.01)	[1]	$ (0.36)	[1]	$ (0.40)	[1]	$ (0.50)	[1]

[1] Dilutive securities are not included in the computation of diluted earnings per share when a company is in a loss position. As such, the numerator and the denominator used in computing both basic and diluted net loss per share for the third quarter and first nine months of 2012 and 2011 are the same. Diluted weighted average shares outstanding were 368.2 million in the third quarter of 2012, 368.6 million in the first nine months of 2012, 365.9 million in the third quarter of 2011 and 366.4 million in the first nine months of 2011.