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Income Taxes (Details Textuals) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012
Income Taxes (Textuals) |  |  |  |
Unrecognized tax benefits as a result of potential resolutions of prior years' tax | $ 736 |  | $ 736 |
Unrecognized tax benefits, amounts recorded to equity | 532 |  | 532 |
Unrecognized tax benefits impact not possible to quantify | 145 |  | 145 |
Actual tax rates | 31.80% | 33.20% | 31.40% | 30.40%
Unrecognized tax benefits, amounts not impacting effective tax rate - temporary differences | $ 59 |  | $ 59 |
Internal Revenue Service (IRS) [Member] | Earliest Year [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Open tax years by major tax jurisdiction |  |  | 2008 |
Internal Revenue Service (IRS) [Member] | Latest Year [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Open tax years by major tax jurisdiction |  |  | 2011 |

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- Definition Represents the remaining decrease or increase in unrecognized tax benefits within the next 12 months for which it is not possible to quantify the impact of the increase or decrease on the effective tax rate and net income. + References No definition available. + Details
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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 2 -Article 4 + Details
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- Definition The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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