Financial Instruments Measured at Fair Value - Additional Information (Detail) (USD $)	3 Months Ended
Mar. 30, 2013	Mar. 30, 2013 Variable rate demand notes [Member]	Dec. 29, 2012 Variable rate demand notes [Member]
Investment [Line Items]
Variable rate demand note maturity year	2037
Securities amortized cost, Due in one year or less		$ 1,400,000	$ 1,400,000
Securities fair value, Due in one year or less		1,500,000	1,500,000
Derivative instrument income (loss), current net income	$ 400,000

Amount of available-for-sale debt securities at cost, net of adjustments, maturing in the next fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments.

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The amount of net gains and losses recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments.

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