Special Charges And Restructuring Activities (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2013
Restructuring and Related Activities [Abstract]
Principal terms of new business, headcount reduced	10,500
Restructuring Cost and Reserve [Line Items]
Business Combination, Integration Related Costs	$ 16
Restructuring Reserve [Roll Forward]
Remaining accrual, beginning	196
Special Charges	12
Non-cash charges	(4)
Adjustments	0
Payments	(61)
Remaining accrual, ending	143
Facility Exit Costs [Member]
Restructuring Reserve [Roll Forward]
Remaining accrual, beginning	4
Special Charges	4
Non-cash charges	(4)
Adjustments	0
Payments	0
Remaining accrual, ending	4
Employee Charges [Member]
Restructuring Reserve [Roll Forward]
Remaining accrual, beginning	192
Special Charges	8
Non-cash charges	0
Adjustments	0
Payments	(61)
Remaining accrual, ending	$ 139

Principal term of new business plan, headcount reduction.

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- Definition

Costs incurred to effect a business combination which have been expensed during the period. Such costs could include business integration costs, systems integration and conversion costs, and severance and other employee-related costs.

+ References

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Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.

+ References

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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

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

-Publisher FASB

-Name Emerging Issues Task Force (EITF)

-Number 95-3

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Amount of any reversal and other adjustment made during the period to the amount of a previously accrued liability for a specified type of restructuring cost, excluding adjustments for costs incurred during the period, costs settled during the period, and foreign currency translation adjustments.

+ References

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-Publisher SEC

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Amount of cash paid in the period to fully or partially settle a specified, previously accrued type of restructuring cost.

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Amount of consideration other than cash paid in the period to fully or partially settle a specified, previously accrued type of restructuring cost.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 146

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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