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Fair Value Measurements	9 Months Ended
Fair Value Measurements	Sep. 26, 2015
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements Due to their short maturities or their insignificance, the carrying amounts of cash and cash equivalents, accounts and notes receivable, accounts payable, accrued liabilities and short-term borrowings approximated their fair values at September 26, 2015 and December 27, 2014. The Company estimates that, based on current market conditions, the value of its 4.750% 2021 senior notes was $621.6 million at September 26, 2015, compared with the carrying value of $599.3 million. The higher fair value resulted from changes, since issuance, in the corporate bond market and investor preferences. The fair value of debt is classified as a Level 2 liability, and is estimated using quoted market prices as provided in secondary markets which consider the Company's credit risk and market related conditions. See Note 11 to the Consolidated Financial Statements for discussion of the Company's derivative instruments and related fair value measurements.