Earnings Per Share (Detail) (USD $) In Millions, except Per Share data	3 Months Ended	9 Months Ended
Oct. 01, 2011	Sep. 25, 2010	Oct. 01, 2011	Sep. 25, 2010
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Net income available to common stockholders	$ 3,468	$ 2,955	$ 9,582	$ 8,284
Weighted average common shares outstanding-basic	5,194	5,575	5,317	5,556
Dilutive effect of employee equity incentive plans (shares)	93	67	96	87
Dilutive effect of convertible debt (shares)	53	52	53	52
Weighted average common shares outstanding-diluted	5,340	5,694	5,466	5,695
Basic earnings per common share (in dollars per share)	$ 0.67	$ 0.53	$ 1.80	$ 1.49
Diluted earnings per common share (in dollars per share)	$ 0.65	$ 0.52	$ 1.75	$ 1.45
Stock Options [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (shares)	104	200	108	168

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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-Name Accounting Standards Codification

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+ Details

- Definition

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

+ References

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-Name Regulation S-X (SX)

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+ Details

- Definition

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.

+ References+ Details

- Definition

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

+ References+ Details

- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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