Computation of Net Loss Per Share (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 29, 2013		Mar. 30, 2012
Earnings Per Share Disclosure [Line Items]
Net loss	$ (55.9)		$ (139.8)
Denominator for basic net loss per share - weighted average shares outstanding	359.4		365.7
Employee stock options and restricted and performance stock awards
Denominator for diluted net loss per share - adjusted weighted average shares outstanding and assumed conversions	359.4		365.7
Net loss per share, basic	$ (0.16)		$ (0.38)
Net loss per share, diluted	$ (0.16)	[1]	$ (0.38)	[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 first quarter of 2013 and the first quarter of 2012 are the same. Diluted weighted average shares outstanding were 360.9 million in the first quarter of 2013, and 367.9 million in the first quarter of 2012.