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Plan of Restructuring - Narrative (Details) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jul. 01, 2017 USD ($) | Jun. 25, 2016 USD ($) | Jul. 01, 2017 USD ($) | Jun. 25, 2016 USD ($) | Dec. 31, 2016 USD ($) positions | Dec. 26, 2015 USD ($) | Nov. 06, 2014
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring Charges, pre-tax | $ 0 | $ 20,383 | $ 0 | $ 24,441 | $ 45,891 |  |
November 2014 restructuring initiative [Member] |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring and Related Cost, Number of Positions Eliminated, Inception to Date | positions |  |  |  |  | 900 |  |
Restructuring and Related Cost, Number of Positions Eliminated, Inception to Date Percent |  |  |  |  | 4.00% |  |
Restructuring Charges, pre-tax |  |  | $ 0 | $ 24,400 | $ 45,891 | $ 34,900 |
November 2014 restructuring initiative [Member] | Minimum [Member] |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring And Related Cost Expected Percentage Of Workforce Eliminated |  |  |  |  |  |  | 2.00%
November 2014 restructuring initiative [Member] | Maximum [Member] |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring And Related Cost Expected Percentage Of Workforce Eliminated |  |  |  |  |  |  | 3.00%

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- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 + Details
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