Summary of Significant Accounting Policies (Policies)	9 Months Ended
Sep. 26, 2018
Accounting Policies [Abstract]
Newly adopted accounting standards and accounting standards to be adopted	Newly Adopted Accounting Standards Effective December 28, 2017, the first day of fiscal 2018, we adopted Accounting Standards Update ("ASU") 2014-09, “Revenue from Contracts with Customers (Topic 606)” and all subsequent ASUs that modified Topic 606. The new guidance clarifies the principles used to recognize revenue for all entities and requires a company to recognize revenue when it transfers goods or services to a customer in an amount that reflects the consideration to which a company expects to be entitled. We elected to apply the modified retrospective method of adoption to those contracts which were not completed as of December 28, 2017. In doing so, we applied the practical expedient to aggregate all contract modifications that occurred before December 28, 2017 in determining the satisfied and unsatisfied performance obligations, the transaction price and the allocation of the transaction price to the satisfied and unsatisfied performance obligations. Results for reporting periods beginning after December 28, 2017 are presented under Topic 606. Prior period amounts are not adjusted and continue to be reported in accordance with our historical accounting under Topic 605 “Revenue Recognition.” Our transition to Topic 606 represents a change in accounting principle. See Note 3 for further information about our transition to Topic 606 and the newly required disclosures. Effective December 28, 2017, we adopted ASU 2016-01, “Financial Instruments—Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities”. The new guidance requires equity investments (except those accounted for under the equity method of accounting, or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income, requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes, requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset, and eliminates the requirement for public business entities to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost. The adoption of this guidance did not have any impact on our Consolidated Financial Statements. Effective December 28, 2017, we adopted ASU 2017-07, “Compensation—Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost”. The new guidance requires an entity to report the service cost component in the same line on the income statement as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net benefit cost are required to be presented in the income statement separately from the service cost component and outside the subtotal of income from operations, if one is presented. If a separate line item is not used, the line item used in the income statement must be disclosed. The adoption of this guidance did not have any impact on our Consolidated Financial Statements. Effective December 28, 2017, we early adopted ASU 2018-02, “Income Statement—Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income”. The new guidance allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act of 2017 (the “Tax Act”) and requires certain disclosures about stranded tax effects. Due to the immateriality of the stranded tax effects resulting from the implementation of the Tax Act, we have elected not to reclassify these amounts from accumulated other comprehensive income to retained earnings. Therefore the adoption of this guidance did not have any impact on our Consolidated Financial Statements. Effective December 28, 2017, we early adopted ASU 2017-12, “Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities”. The new update better aligns an entity’s risk management activities and financial reporting for hedging relationships, simplifies the hedge accounting requirements, and improves the disclosures of hedging arrangements. The amended presentation and disclosure guidance has been applied on a prospective basis. The adoption of this guidance did not have any impact on our Consolidated Financial Statements. Effective September 26, 2018, we early adopted ASU 2018-13, “Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement”, which modifies the disclosure requirements on fair value measurements. The adoption of this guidance did not have any impact on our disclosures. Effective September 26, 2018, we early adopted ASU 2018-14, “Compensation—Retirement Benefits—Defined Benefit Plans—General (Topic 715-20): Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans”, which modifies the disclosure requirements for defined benefit pension plans and other postretirement plans. The adoption of this guidance will have an immaterial impact on our annual disclosures. Effective September 26, 2018, we early adopted ASU 2018-15, “Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (a consensus of the FASB Emerging Issues Task Force)”, which aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. The guidance was adopted on a prospective basis and did not have a material impact on our Consolidated Financial Statements. Additional new accounting guidance became effective for us as of December 28, 2017 that we reviewed and concluded was either not applicable to our operations or had no material effect on the our Consolidated Financial Statements and related disclosures. Accounting Standards to be Adopted In February 2016, the Financial Accounting Standards Board (“FASB”) issued ASU 2016-02, “Leases (Topic 842)”, which provides guidance for accounting for leases. The new guidance requires companies to recognize a right-of-use asset and a lease liability for all operating and capital (financing) leases with lease terms greater than 12 months. The FASB has subsequently amended this guidance by issuing ASU 2018-10 and ASU 2018-11 in July 2018 to provide clarification and further guidance around areas identified as potential implementation issues and to allow an alternative transition method. The alternative transition method allows entities to initially apply the new leases standard at the adoption date by recognizing a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption rather than retroactive restatement of all periods presented. All of the standards are effective for annual and interim periods beginning after December 15, 2018 (our fiscal 2019) with early adoption permitted. The guidance will be adopted using the alternative transition method. The adoption of ASU 2016-02 will have a material impact on our Consolidated Balance Sheets resulting from the recognition of operating lease right-of-use assets and liabilities. Although the new guidance is also expected to impact the measurement and presentation of certain expenses and cash flows related to leasing arrangements, we do not believe there will be a material impact to our Consolidated Statements of Income or Consolidated Statements of Cash Flows. We do not expect the recognition of the additional operating lease liabilities will impact any credit facility debt covenants as these liabilities are not considered to be debt. We have decided to elect the package of practical expedients that do not require us to reassess whether existing contracts are or contain leases, lease classification or initial direct costs. In addition, we have decided not to elect the hindsight practical expedient which would allow us to reassess lease terms and impairment of the right-to-use assets. We have completed the implementation of a new lease management system in preparation for adoption and continue to assess the impact that the new guidance will have on our financial statements and related disclosures. In June 2016, the FASB issued ASU 2016-13, “Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments”. The new guidance replaces the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform financial statement users of credit loss estimates. ASU 2016-13 is effective for annual and interim periods beginning after December 15, 2019 (our fiscal 2020) with early adoption permitted for annual and interim periods beginning after December 15, 2018 (our fiscal 2019). We do not expect the adoption of this guidance to have a material impact on our Consolidated Financial Statements. We reviewed all other newly issued accounting pronouncements and concluded that they are either not applicable to our business or are not expected to have a material effect on our Consolidated Financial Statements as a result of future adoption.

Newly Adopted Accounting Standards

Effective December 28, 2017, the first day of fiscal 2018, we adopted Accounting Standards Update ("ASU") 2014-09, “Revenue from Contracts with Customers (Topic 606)” and all subsequent ASUs that modified Topic 606. The new guidance clarifies the principles used to recognize revenue for all entities and requires a company to recognize revenue when it transfers goods or services to a customer in an amount that reflects the consideration to which a company expects to be entitled. We elected to apply the modified retrospective method of adoption to those contracts which were not completed as of December 28, 2017. In doing so, we applied the practical expedient to aggregate all contract modifications that occurred before December 28, 2017 in determining the satisfied and unsatisfied performance obligations, the transaction price and the allocation of the transaction price to the satisfied and unsatisfied performance obligations. Results for reporting periods beginning after December 28, 2017 are presented under Topic 606. Prior period amounts are not adjusted and continue to be reported in accordance with our historical accounting under Topic 605 “Revenue Recognition.” Our transition to Topic 606 represents a change in accounting principle. See Note 3 for further information about our transition to Topic 606 and the newly required disclosures.

Effective December 28, 2017, we adopted ASU 2016-01, “Financial Instruments—Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities”. The new guidance requires equity investments (except those accounted for under the equity method of accounting, or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income, requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes, requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset, and eliminates the requirement for public business entities to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost. The adoption of this guidance did not have any impact on our Consolidated Financial Statements.

Effective December 28, 2017, we adopted ASU 2017-07, “Compensation—Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost”. The new guidance requires an entity to report the service cost component in the same line on the income statement as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net benefit cost are required to be presented in the income statement separately from the service cost component and outside the subtotal of income from operations, if one is presented. If a separate line item is not used, the line item used in the income statement must be disclosed. The adoption of this guidance did not have any impact on our Consolidated Financial Statements.

Effective December 28, 2017, we early adopted ASU 2018-02, “Income Statement—Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income”. The new guidance allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act of 2017 (the “Tax Act”) and requires certain disclosures about stranded tax effects. Due to the immateriality of the stranded tax effects resulting from the implementation of the Tax Act, we have elected not to reclassify these amounts from accumulated other comprehensive income to retained earnings. Therefore the adoption of this guidance did not have any impact on our Consolidated Financial Statements.

Effective December 28, 2017, we early adopted ASU 2017-12, “Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities”. The new update better aligns an entity’s risk management activities and financial reporting for hedging relationships, simplifies the hedge accounting requirements, and improves the disclosures of hedging arrangements. The amended presentation and disclosure guidance has been applied on a prospective basis. The adoption of this guidance did not have any impact on our Consolidated Financial Statements.

Effective September 26, 2018, we early adopted ASU 2018-13, “Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement”, which modifies the disclosure requirements on fair value measurements. The adoption of this guidance did not have any impact on our disclosures.

Effective September 26, 2018, we early adopted ASU 2018-14, “Compensation—Retirement Benefits—Defined Benefit Plans—General (Topic 715-20): Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans”, which modifies the disclosure requirements for defined benefit pension plans and other postretirement plans. The adoption of this guidance will have an immaterial impact on our annual disclosures.

Effective September 26, 2018, we early adopted ASU 2018-15, “Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (a consensus of the FASB Emerging Issues Task Force)”, which aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. The guidance was adopted on a prospective basis and did not have a material impact on our Consolidated Financial Statements.

Additional new accounting guidance became effective for us as of December 28, 2017 that we reviewed and concluded was either not applicable to our operations or had no material effect on the our Consolidated Financial Statements and related disclosures.

Accounting Standards to be Adopted

In February 2016, the Financial Accounting Standards Board (“FASB”) issued ASU 2016-02, “Leases (Topic 842)”, which provides guidance for accounting for leases. The new guidance requires companies to recognize a right-of-use asset and a lease liability for all operating and capital (financing) leases with lease terms greater than 12 months. The FASB has subsequently amended this guidance by issuing ASU 2018-10 and ASU 2018-11 in July 2018 to provide clarification and further guidance around areas identified as potential implementation issues and to allow an alternative transition method. The alternative transition method allows entities to initially apply the new leases standard at the adoption date by recognizing a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption rather than retroactive restatement of all periods presented. All of the standards are effective for annual and interim periods beginning after December 15, 2018 (our fiscal 2019) with early adoption permitted. The guidance will be adopted using the alternative transition method.

The adoption of ASU 2016-02 will have a material impact on our Consolidated Balance Sheets resulting from the recognition of operating lease right-of-use assets and liabilities. Although the new guidance is also expected to impact the measurement and presentation of certain expenses and cash flows related to leasing arrangements, we do not believe there will be a material impact to our Consolidated Statements of Income or Consolidated Statements of Cash Flows. We do not expect the recognition of the additional operating lease liabilities will impact any credit facility debt covenants as these liabilities are not considered to be debt.

We have decided to elect the package of practical expedients that do not require us to reassess whether existing contracts are or contain leases, lease classification or initial direct costs. In addition, we have decided not to elect the hindsight practical expedient which would allow us to reassess lease terms and impairment of the right-to-use assets. We have completed the implementation of a new lease management system in preparation for adoption and continue to assess the impact that the new guidance will have on our financial statements and related disclosures.

In June 2016, the FASB issued ASU 2016-13, “Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments”. The new guidance replaces the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform financial statement users of credit loss estimates. ASU 2016-13 is effective for annual and interim periods beginning after December 15, 2019 (our fiscal 2020) with early adoption permitted for annual and interim periods beginning after December 15, 2018 (our fiscal 2019). We do not expect the adoption of this guidance to have a material impact on our Consolidated Financial Statements.

We reviewed all other newly issued accounting pronouncements and concluded that they are either not applicable to our business or are not expected to have a material effect on our Consolidated Financial Statements as a result of future adoption.