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Supplemental Financial Information (Schedule of Other Supplemental Information) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 27, 2014
Dec. 28, 2013
Dec. 29, 2012
Supplemental Financial Information [Abstract]      
Rent expense $ 707us-gaap_LeaseAndRentalExpense $ 639us-gaap_LeaseAndRentalExpense $ 581us-gaap_LeaseAndRentalExpense
Interest paid 925us-gaap_InterestPaidNet 1,007us-gaap_InterestPaidNet 1,074us-gaap_InterestPaidNet
Income taxes paid, net of refunds $ 1,847us-gaap_IncomeTaxesPaidNet $ 3,076us-gaap_IncomeTaxesPaidNet $ 1,840us-gaap_IncomeTaxesPaidNet