Annual report pursuant to Section 13 and 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
Dec. 27, 2014
Dec. 28, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Short-term debt (excluding capital leases), at carrying amount $ 172us-gaap_ShortTermBorrowings $ 55us-gaap_ShortTermBorrowings
Short-term debt (excluding capital leases), at estimated fair value 173us-gaap_ShorttermDebtFairValue 55us-gaap_ShorttermDebtFairValue
Long-term debt (excluding capital leases), at carrying amount 2,025us-gaap_LongTermDebtNoncurrent 1,986us-gaap_LongTermDebtNoncurrent
Long-term debt (excluding capital leases), at estimated fair value $ 1,858us-gaap_LongTermDebtFairValue $ 2,132us-gaap_LongTermDebtFairValue