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Income Taxes (Details) (USD $) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 27, 2014 | Sep. 28, 2013 | Sep. 27, 2014 | Sep. 28, 2013
Income Tax Contingency [Line Items] |  |  |  |
Unrecognized tax benefits, balance at the beginning of the period |  |  | $ 24,716,000 | $ 64,390,000
Decrease in unrecognized tax benefits resulting from settlements with taxing authorities |  |  |  | (35,279,000)
Other changes in uncertain tax benefits |  |  | (3,268,000) | (2,662,000)
Unrecognized tax benefits, balance at the end of the period | 21,448,000 | 26,449,000 | 21,448,000 | 26,449,000
Expected change in unrecognized tax benefits in the next twelve months | (5,000,000) |  | (5,000,000) |
Income Taxes [Line Items] |  |  |  |
Effective income tax rate | 13.60% | 13.00% | 14.10% | 3.90%
Net tax benefit related to completed tax audit examinations |  |  |  | 31,000,000
Percentage point change in effective tax rate relating to infrequent income tax items |  |  |  | (10.6)
Related to Fiscal 2012 [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
R&D Tax Credit |  |  |  | $ 3,000,000

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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to research tax credit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 + Details
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