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Fair Value Measurements (Details 3) (USD $)
In Millions, unless otherwise specified
Apr. 03, 2015
Dec. 31, 2014
Other fair value disclosures    
Long-term debt, including the current portion, carrying amount $ 28,127us-gaap_LongTermDebt $ 22,615us-gaap_LongTermDebt
Long-term debt, including the current portion, fair value $ 29,016us-gaap_LongTermDebtFairValue $ 23,411us-gaap_LongTermDebtFairValue