Net Loss Per Share (Computation Of Net Loss Per Share) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 30, 2012		Apr. 01, 2011
Net Loss Per Share [Abstract]
Net loss	$ (139.8)		$ (24.1)
Denominator for basic net loss per share - weighted average shares outstanding	365.7		363.0
Employee stock options and restricted and performance stock awards
Denominator for diluted net loss per share - adjusted weighted average shares outstanding and assumed conversions	365.7		363.0
Net loss per share, basic	$ (0.38)		$ (0.07)
Net loss per share, diluted	$ (0.38)	[1]	$ (0.07)	[1]
Diluted weighted average shares outstanding in the absence of a loss	367.9		365.5

[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 2012 and the first quarter of 2011 are the same. Diluted weighted average shares outstanding were 367.9 million in the first quarter of 2012 and 365.5 million in the first quarter of 2011.