Employee Benefit Plan - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Employee Benefit Plans [Line Items]
Profit Sharing and Retirement Savings Plan, plan expense	$ 22.5	$ 17.5	$ 49.2	$ 58.1