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Income Taxes - Narrative (Details) (USD $)
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12 Months Ended | ||
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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| Operating Loss Carryforwards [Line Items] | |||
| Other comprehensive income (loss), tax | $ 2,740,000,000 | $ (1,342,000,000) | $ 2,933,000,000 |
| Tax effect on common stock and additional paid in capital from employee stock purchase plan activity | (128,000,000) | (277,000,000) | 19,000,000 |
| Unrecognized tax benefits that would impact effective rate | 2,500,000,000 | 3,100,000,000 | 3,300,000,000 |
| Unrecognized tax benefits is reasonable possible, amount of unrecorded benefit | 2,100,000,000 | ||
| Penalties and interest expense | 127,000,000 | 99,000,000 | (168,000,000) |
| Penalties and interest accured | 888,000,000 | 775,000,000 | |
| Undistributed earnings of foreign subsidiaries | 17,000,000,000 | ||
| Deferred tax liabilities, undistributed foreign earnings | $ 4,300,000,000 | ||
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Minimum [Member]
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| Operating Loss Carryforwards [Line Items] | |||
| Number of jurisdictions for filing income tax returns | 100 | ||
| X | ||||||||||
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- Definition
Number Of Jurisdictions For Filling Income Tax Returns No definition available.
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| X | ||||||||||
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- Definition
Adjustment to common stock and additional paid in capital related to the net effect of excess tax benefits and tax deficiencies associated with an employee stock ownership plan (ESOP). No definition available.
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| X | ||||||||||
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- Definition
Amount of deferred tax liability attributable to taxable temporary differences from undistributed earnings of subsidiaries and other recognized entities not within the country of domicile of the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The amount of estimated penalties and interest accrued as of the balance sheet date arising from income tax examinations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The sum of the amounts of estimated penalties and interest recognized in the period arising from income tax examinations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Amount of tax expense (benefit) allocated to other comprehensive income (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of undistributed earnings of foreign subsidiaries intended to be permanently reinvested outside the country of domicile. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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