Equity (Earnings per Share) (Details) (USD $) In Millions, except Per Share data	3 Months Ended	9 Months Ended
Oct. 01, 2011	Oct. 02, 2010	Oct. 01, 2011	Oct. 02, 2010
Equity [Abstract]
Net income, basic	$ 290	$ 338	$ 999	$ 1,058
Average shares outstanding, basic	360	373	363	378
Net earnings per share, basic	$ 0.81	$ 0.91	$ 2.75	$ 2.80
Average shares outstanding, dilutive potential common shares	3	3	2	3
Net earnings per share, dilutive potential common shares	$ (0.01)	$ (0.01)	$ (0.02)	$ (0.02)
Net income, diluted	$ 290	$ 338	$ 999	$ 1,058
Average shares outstanding, diluted	363	376	365	381
Net earnings per share, diluted	$ 0.80	$ 0.90	$ 2.73	$ 2.78

Earnings per share dilutive adjustment

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

+ References

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-Publisher SEC

-Name Regulation S-X (SX)

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-Name Regulation S-X (SX)

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The amount of net income or loss for the period per each share of common stock and dilutive common stock equivalents outstanding during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 128

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 20

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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The portion of consolidated profit or loss for the period, net of income taxes, which is attributable to the parent. If the entity does not present consolidated financial statements, the amount of profit or loss for the period, net of income taxes.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

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-Appendix A

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-Name Emerging Issues Task Force (EITF)

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Net Income (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.

+ References

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The sum of dilutive potential common shares used in the calculation of the diluted per-share computation.

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The average number of shares issued and outstanding that are used in calculating diluted EPS, determined based on the timing of issuance of shares in the period.

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

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