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	6 Months Ended
	Jun. 30, 2013	Jun. 29, 2014	Jun. 30, 2013
Net Income Loss Per Common Share
Shares that would be issued upon conversion	34.7	34.7	34.7
Convertible Notes
Net Income Loss Per Common Share
Initial debt conversion price	$ 5.4750	$ 5.4750	$ 5.4750
Convertible Notes Hedge Warrant
Net Income Loss Per Common Share
Initial debt conversion price	$ 7.6389	$ 7.6389	$ 7.6389