Other Stock-Related Information (Other Stock-based Compensation) (Narratives) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule Of Share Based Compensation Stock Options Activity [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	$ 739
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	118	128	88
Restricted Stock Units (RSUs) [Member]
Schedule Of Share Based Compensation Stock Options Activity [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 26.08	$ 24.54	$ 20.79
Share Based Compensation Arrangement Equity Awards Other Than Options Vested In Period Intrinsic Value	86	109	116
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	233
Unrecognized Compensation Cost Expected To Be Recognized In Subsequent Year	54
Restricted Stock Units Rsu And Performance Share Units [Member]
Schedule Of Share Based Compensation Stock Options Activity [Line Items]
Allocated Share-based Compensation Expense	56	62	79
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	$ 147	$ 145	$ 153
Excess Of Actual Tax Deductions Over Amounts Assumed Recognized In Shareowners Equity	86000000	86000000	53000000

The excess amoun of actual tax deductions over amounts assured that gets recognized in shareowner's equity

No definition available.

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- Definition

The total intrinsic value of restricted stock units vested during the period.

+ References

No definition available.

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- Definition

The unrecognized compensation cost related to nonvested options that is expected to be recognized in the year subsequent to the period end date.

+ References

No definition available.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

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Unrecognized cost of unvested share-based compensation awards.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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- Definition

The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued 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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-Publisher FASB

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