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Business Segment Information - Consolidated Assets (Details) (USD $)
In Millions, unless otherwise specified |
Dec. 31, 2012
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Dec. 31, 2011
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| Segment Reporting Information [Line Items] | ||||||
| Assets | $ 2,209,974 | [1] | $ 2,129,046 | [1] | ||
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Operating Segments [Member]
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| Segment Reporting Information [Line Items] | ||||||
| Assets | 1,962,690 | 1,808,555 | ||||
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Asset And Liability Management Activities [Member]
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| Segment Reporting Information [Line Items] | ||||||
| Assets | 622,722 | 611,793 | ||||
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Equity Investment Income [Member]
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| Segment Reporting Information [Line Items] | ||||||
| Assets | 5,508 | 7,098 | ||||
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Liquidating Businesses [Member]
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| Segment Reporting Information [Line Items] | ||||||
| Assets | 32,597 | 37,570 | ||||
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Intersegment Elimination [Member]
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| Segment Reporting Information [Line Items] | ||||||
| Assets | (554,426) | (492,251) | ||||
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Other Adjustment [Member]
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| Segment Reporting Information [Line Items] | ||||||
| Assets | $ 140,883 | $ 156,281 | ||||
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- Definition
Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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