Fair Value Measurements	3 Months Ended
Fair Value Measurements	Mar. 27, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	Note 4—Fair Value Measurements Fair value measurements enable the reader of the financial statements to assess the inputs used to develop those measurements by establishing a hierarchy for ranking the quality and reliability of the information used to determine fair values. The Company classifies and discloses assets and liabilities carried at fair value in one of the following three categories: Level 1: Quoted market prices in active markets for identical assets or liabilities. Level 2: Observable market-based inputs or unobservable inputs that are corroborated by market data. Level 3: Unobservable inputs that are not corroborated by market data. The fair values of the Company’s investments in marketable securities are based on quoted prices in active markets for identical assets. The fair value of the investments in marketable securities was approximately $15 million and $21 million at March 27, 2018 and December 26, 2017, respectively, and the Company classified such investments as Level 1. These investments consist entirely of U.S. Treasury instruments with a maturity of three months or less at the date of purchase and the interest income received from these instruments is included in interest expense, net in the condensed consolidated statements of income. These amounts are included in cash and cash equivalents in the accompanying condensed consolidated balance sheets.

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.