Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012
Income Tax Disclosure [Abstract]
Provision for/(benefit from) income taxes	$ 5,200,000	$ 11,800,000	$ 2,900,000	$ (37,262,000)
Reversal in liabilities for uncertain tax positions			8,700,000	10,200,000
Unrecognized tax benefits related to uncertain tax positions			3,900,000	5,200,000
Interest and penalties related to uncertain tax positions			4,800,000	5,000,000
Portion of income tax benefit due to release of valuation allowance				43,200,000
Unrecognized tax benefits	200,100,000		200,100,000
Estimated decrease in unrecognized tax benefits, plus accrued interest and penalties	$ 46,800,000		$ 46,800,000