Debt Obligations and Commitments (Schedule of Long and Short-Term Debt Contractual Commitments) (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 26, 2015
Debt Instrument [Line Items]
Commercial paper (0.6% and 0.3%)	$ 2,257	$ 770
Operating Leases, Future Minimum Payments Due	1,780
Operating Leases, Future Minimum Payments Due, Next Twelve Months	423
Operating Leases, Future Minimum Payments, Due Thereafter	350
Debt Instrument, Unamortized Discount	142	162
Notes Due 2021 [Member]
Debt Instrument [Line Items]
Notes due	$ 2,249	$ 1,290
Interest rate on debt	2.40%	3.00%
Current Maturities Of Long-Term Debt
Debt Instrument [Line Items]
Less: current maturities of long-term debt obligations	$ (4,401)	$ (3,109)
One Point Three Five Zero Percent Notes Due 2019 [Member] \| Notes Due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 750
Debt Instrument, Interest Rate, Stated Percentage	1.35%
One Point Seven Zero Percent Notes Due 2021 [Member] \| Notes Due 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 750
Debt Instrument, Interest Rate, Stated Percentage	1.70%
One Point Five Zero Percent Notes Due 2019 [Member] \| Notes Due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 600
Debt Instrument, Interest Rate, Stated Percentage	1.50%
Two Point Eight Five Zero Percent Notes Due 2026 [Member] \| Notes Due 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 750
Debt Instrument, Interest Rate, Stated Percentage	2.85%
Two Point Three Seven Five Percent Notes Due 2026 [Member] \| Notes Due 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 1,000
Debt Instrument, Interest Rate, Stated Percentage	2.375%
Four Point Four Five Zero Percent Notes Due 2046 [Member] \| Notes Due 2046 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 750
Debt Instrument, Interest Rate, Stated Percentage	4.45%
Zero Point Eight Seven Five Percent Notes Due 2028 [Member] \| Notes Due 2028 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 750
Debt Instrument, Interest Rate, Stated Percentage	0.875%
Three Point Four Five Zero Percent Notes Due 2046 [Member] \| Notes Due 2046 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 1,500
Debt Instrument, Interest Rate, Stated Percentage	3.45%

Carrying value as of the balance sheet date of short-term borrowings using unsecured obligations issued by banks, corporations and other borrowers to investors. The maturities of these money market securities generally do not exceed 270 days.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

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