Income Taxes (Details 7) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Income Taxes (Amounts in paragraphs)
Effective tax rate on income from continuing operations	19.50%	30.70%	34.10%
Goodwill impairment			$ 570
Recognition of net tax benefits, as a result of the settlement	298	75	35
Recognition of net tax benefits as a result of settlement, interest portion		20	4
Recognition of net tax benefits, as a result of the settlement, in cash	66
Reduction in liability for uncertainty tax provisions	311	60	126
Reduction in liability for uncertainty in income tax provisions related accrued interest portion			44
Reduction in liability for uncertainty in income tax provisions related to goodwill			95
Estimated value of uncertain tax positions	137
Estimated value of uncertain tax positions - accrued interest	11
Net interest income (expense) included in federal and foreign, and state income tax provisions	88	6	(29)
Federal income tax statutory rate	35.00%
Accumulated undistributed foreign earnings
Deferred Tax Liability Not Recognized [Line Items]
Deferred tax liability not recognized	$ 668

Income Taxes.

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The amount of the additional liability or refund received or expected based on a final settlement with a taxing authority related to goodwill.

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- Definition

The interest component of income tax expense representing amounts paid or payable (or refundable) which are classified as "income taxes" as determined by applying the provisions of enacted tax law to other than the taxable income (loss) from continuing operations for the period.

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- Definition

The current and non-current portions of the amount recognized for uncertain tax positions as of the balance sheet date.

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- Definition

Reflects the cash inflow from the effects of adjustments of previously recorded tax expense, significant settlements of income tax disputes, and unusual tax positions or infrequent actions taken by the entity, including tax assessment reversal, IRS tax settlement and unusual repatriation of foreign earnings.

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The amount of the deferred tax liability which was not recognized because of the exceptions to comprehensive recognition of deferred taxes.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 44
-Subparagraph c, d

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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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A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 47

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph h
-Subparagraph 2
-Article 4

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The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate shall be the regular tax rate if there are alternative tax systems.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 47

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- Definition

Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph e(2)

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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 20

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The amount of estimated interest accrued as of the balance sheet date arising from income tax examinations.

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The amount of interest expense recorded in the period based upon the specified tax examination.

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The amount of the additional liability or refund received or expected based on a final settlement with a taxing authority.

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Reflects the effects of adjustments of previously recorded tax expense, significant settlements of income tax disputes, and unusual tax positions or infrequent actions taken by the entity, including tax assessment reversal, IRS tax settlement and unusual repatriation of foreign earnings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 48
-Paragraph 10A, 10B, 10C

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-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 48
-Paragraph 10
-Subparagraph b

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This element represents the total of accruals as of the date of the statement of financial position for interest recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity and the amount of statutory penalties for a tax position claimed or expected to be claimed by the entity, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
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-Paragraph 21
-Subparagraph c

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-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 48
-Paragraph 15, 16

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