Forward and Option Purchase Contracts Outstanding (Details) In Thousands, unless otherwise specified	9 Months Ended
Sep. 28, 2013 Currency, British Pound Sterling Derivative Instrument 2 GBP (£)	Sep. 28, 2013 Currency, Euro Derivative Instrument 2 EUR (€)	Sep. 28, 2013 Currency, Euro Derivative Instrument 3 GBP (£)	Sep. 28, 2013 Currency, U.S. Dollar Derivative Instrument 1 USD ($)
Derivative [Line Items]
Forward contracts to purchase		€ 29,641,034		$ 20,296,500
Forward contracts to sell	£ 25,000,000		£ 15,000,000
Maturity	Dec. 27, 2013	Dec. 27, 2013	Dec. 27, 2013	Dec. 27, 2013

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 1A

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579245-113959

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 1B

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5580258-113959

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