Earnings Per Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended	12 Months Ended
Dec. 26, 2014	Sep. 26, 2014	Jun. 27, 2014	Mar. 28, 2014	Dec. 27, 2013	Sep. 27, 2013	Jun. 28, 2013	Mar. 29, 2013	Dec. 26, 2014	Dec. 27, 2013	Dec. 28, 2012
Numerator:
Net Earnings	$ 491us-gaap_NetIncomeLoss	$ 509us-gaap_NetIncomeLoss	$ 529us-gaap_NetIncomeLoss	$ 398us-gaap_NetIncomeLoss	$ 426us-gaap_NetIncomeLoss	$ 455us-gaap_NetIncomeLoss	$ 521us-gaap_NetIncomeLoss	$ 462us-gaap_NetIncomeLoss	$ 1,927us-gaap_NetIncomeLoss	$ 1,864us-gaap_NetIncomeLoss	$ 1,863us-gaap_NetIncomeLoss
Dividend Equivalents on Restricted Stock									(1)	0	0
Net Earnings, Attributable to Common Shareholders									$ 1,926	$ 1,864	$ 1,863
Denominator:
Average Common Shares Outstanding									1,001	1,019	1,038
Other Potentially Dilutive Common Shares									1	0	2
Average Common Shares Outstanding, Assuming Dilution									1,002	1,019	1,040
Net Earnings Per Share, Basic (dollars per share)	$ 0.49us-gaap_EarningsPerShareBasic	$ 0.51us-gaap_EarningsPerShareBasic	$ 0.53us-gaap_EarningsPerShareBasic	$ 0.40us-gaap_EarningsPerShareBasic	$ 0.42us-gaap_EarningsPerShareBasic	$ 0.45us-gaap_EarningsPerShareBasic	$ 0.51us-gaap_EarningsPerShareBasic	$ 0.45us-gaap_EarningsPerShareBasic	$ 1.93us-gaap_EarningsPerShareBasic	$ 1.83us-gaap_EarningsPerShareBasic	$ 1.80us-gaap_EarningsPerShareBasic
Net Earnings Per Share, Assuming Dilution (dollars per share)	$ 0.49us-gaap_EarningsPerShareDiluted	$ 0.51us-gaap_EarningsPerShareDiluted	$ 0.53us-gaap_EarningsPerShareDiluted	$ 0.40us-gaap_EarningsPerShareDiluted	$ 0.42us-gaap_EarningsPerShareDiluted	$ 0.45us-gaap_EarningsPerShareDiluted	$ 0.51us-gaap_EarningsPerShareDiluted	$ 0.45us-gaap_EarningsPerShareDiluted	$ 1.92us-gaap_EarningsPerShareDiluted	$ 1.83us-gaap_EarningsPerShareDiluted	$ 1.79us-gaap_EarningsPerShareDiluted

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Net Income or Loss Available to Common Stockholders plus adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions.

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