Commitments and Contingent Liabilities - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended	9 Months Ended
	Aug. 31, 2013	Sep. 29, 2013
Loss Contingencies [Line Items]
Accrued liabilities related to warranties		$ 0.3
Property, Plant and Equipment
Loss Contingencies [Line Items]
Estimated fair value of the costs to construct buildings		6.5
Property, Plant and Equipment | Build To Suit Lease
Loss Contingencies [Line Items]
Estimated fair value of the costs to construct buildings	23.0	11.2
Expected construction completion year	2014-10	2014-01
Property, Plant and Equipment | Build To Suit Lease | Corporate Headquarters
Loss Contingencies [Line Items]
Estimated fair value of the costs to construct buildings		6.4
Minimum
Loss Contingencies [Line Items]
Time-frame over which the accrued amounts may be paid out, in years		15
Maximum
Loss Contingencies [Line Items]
Time-frame over which the accrued amounts may be paid out, in years		20
Accrued Liabilities
Loss Contingencies [Line Items]
Waste disposed accrued liability		2.4
Other Liabilities
Loss Contingencies [Line Items]
Waste disposed accrued liability		$ 6.4