Long-Term Incentive Employee Compensation (Details Textual) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended	6 Months Ended
Mar. 31, 2011	Jun. 30, 2011
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Unrecognized compensation cost related to unvested options and restricted stock		$ 64
Unrecognized compensation cost weighted average amortization period (years)		2.0
Long-Term Incentive Employee Compensation (Textuals) [Abstract]
Stock options exercised		1.0
Proceeds from stock options exercised		41
Shares of RS on which restrictions lapsed		0.3
Issuances of shares from treasury account		0.2
cash payments to settle awards		18
Non Qualified Stock Options [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Plans Awards, Grants	0.7
Grant date fair value	$ 14.86
Restricted Stock [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Plans Awards, Grants	0.5
Grant date fair value	$ 57.68
TSR Plan Awards [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Unrecognized compensation cost related to unvested options and restricted stock		$ 14
Unrecognized compensation cost weighted average amortization period (years)		2.3
Plans Awards, Grants	10.8
Grant date fair value	$ 1.00
Maximum [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Percentage of Payout		200.00%
Minimum [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Percentage of Payout		0.00%

Long-Term Incentive Employee Compensation.

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Percentage of payout.

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Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Grant Date Fair Value.

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Shares of RS on which restrictions lapsed.

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As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

+ References

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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph h
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The weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, using a decimal to express in number of years.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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- Definition

The liabilities paid during the accounting period for equity-based compensation.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Number of share options (or share units) exercised during the current period.

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Value stock issued during the period as a result of the exercise of stock options.

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Number of shares of common and preferred stock retired from treasury during the period.

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