Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments (Details) (Schedule of Carrying Amounts and Estimated Fair Values of Financial Instruments not Recorded at Fair Value)

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Financial Instruments (Details) (Schedule of Carrying Amounts and Estimated Fair Values of Financial Instruments not Recorded at Fair Value) - USD ($)
$ in Millions
Jun. 27, 2015
Dec. 27, 2014
Financial Instrument [Line Items]    
Short-term debt (excluding capital leases), at carrying amount $ 230 $ 172
Short-term debt (excluding capital leases), at estimated fair value 230 173
Long-term debt (excluding capital leases), at carrying amount 2,025 2,025
Long-term debt (excluding capital leases), at estimated fair value $ 1,789 $ 1,858