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, unless otherwise specified
Mar. 28, 2015
Dec. 27, 2014
Financial Instrument [Line Items]    
Short-term debt (excluding capital leases), at carrying amount $ 230us-gaap_ShortTermBorrowings $ 172us-gaap_ShortTermBorrowings
Short-term debt (excluding capital leases), at estimated fair value 230us-gaap_ShorttermDebtFairValue 173us-gaap_ShorttermDebtFairValue
Long-term debt (excluding capital leases), at carrying amount 2,025us-gaap_LongTermDebtNoncurrent 2,025us-gaap_LongTermDebtNoncurrent
Long-term debt (excluding capital leases), at estimated fair value $ 1,906us-gaap_LongTermDebtFairValue $ 1,858us-gaap_LongTermDebtFairValue