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Derivative Instruments and Hedging Activity - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 29, 2013	Mar. 30, 2012	Mar. 29, 2013 Foreign exchange forward [Member]	Dec. 31, 2012 Precious metal contracts [Member]	Mar. 29, 2013 Cash Flow Hedging [Member]	Mar. 30, 2012 Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional value of foreign currency forward contracts			$ 22.3	$ 26.3
Fair value of contracts			1.0		1.0	1.2
Precious metal hedge contracts outstanding	0
Ineffective expense	$ 0	$ 0

The portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness.

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