Computation of Net Loss Per Share (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 28, 2013		Jun. 29, 2012		Jun. 28, 2013		Jun. 29, 2012
Earnings Per Share Disclosure [Line Items]
Net loss	$ (7.8)		$ (4.7)		$ (63.7)		$ (144.5)
Denominator for basic net loss per share - weighted average shares outstanding	356.1		367.1		357.7		366.4
Employee stock options and restricted and performance stock awards
Denominator for diluted net loss per share - adjusted weighted average shares outstanding and assumed conversions	356.1		367.1		357.7		366.4
Net loss per share, basic	$ (0.02)		$ (0.01)		$ (0.18)		$ (0.39)
Net loss per share, diluted	$ (0.02)	[1]	$ (0.01)	[1]	$ (0.18)	[1]	$ (0.39)	[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 second quarter and first six months of 2013 and the second quarter and first six months of 2012 are the same. Diluted weighted average shares outstanding were 356.4 million in the second quarter of 2013, 358.9 million in the first six months of 2013, and 368.1 million in the second quarter of 2012 and 368.2 million in the first six months of 2012.