Forward and Option Purchase Contracts Outstanding (Detail) (Foreign Exchange Forward)		6 Months Ended		6 Months Ended
Jul. 02, 2011 Currency, British Pound Sterling GBP (£)	Jul. 02, 2011 Currency, British Pound Sterling Derivative Instrument 1 GBP (£)	Jul. 02, 2011 Currency, British Pound Sterling Derivative Instrument 2 GBP (£)	Jul. 02, 2011 Currency, Euro EUR (€)	Jul. 02, 2011 Currency, Euro Derivative Instrument 1 EUR (€)	Jul. 02, 2011 Currency, Euro Derivative Instrument 2 EUR (€)
Derivative [Line Items]
Forward contracts to sell British Pounds	£ 29,000,000	£ 15,000,000	£ 14,000,000
Maturity		Jul. 08, 2011	Jul. 08, 2011		Jul. 08, 2011	Jul. 08, 2011
Forward contracts to purchase Euro Dollars				€ 32,400,000	€ 16,767,000	€ 15,648,000

Aggregate notional amount of foreign currency derivatives to purchase a foreign currency. Notional amount refers to the number of currency units specified in the foreign currency derivative contract.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Notional Amount
-URI http://asc.fasb.org/extlink&oid=6519104

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5579245-113959

Name:	us-gaap_NotionalAmountOfForeignCurrencyDerivativePurchaseContracts
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant