Computation of Basic and Diluted Net Income Per Common Share (Parenthetical) (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013
Convertible Notes
Net Income Loss Per Common Share
Initial debt conversion price	$ 5.4750	$ 5.4750
Shares that would be issued upon conversion	34.7	34.7
Convertible Notes Hedge Warrant
Net Income Loss Per Common Share
Initial debt conversion price	$ 7.6650	$ 7.6650
Shares that would be issued upon conversion	34.7	34.7