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Fair Value of Financial Instruments (Details) (USD $)
In Millions, unless otherwise specified |
Sep. 30, 2012
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Dec. 31, 2011
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|---|---|---|---|---|---|---|---|---|
| Financial liabilities | ||||||||
| Long-term borrowings | $ 31,499 | $ 30,325 | ||||||
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Carrying Value
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| Financial assets | ||||||||
| Loans, notes and mortgages | 19,564 | [1] | 20,574 | [1] | ||||
| Financial liabilities | ||||||||
| Deposits | 12,529 | 12,364 | ||||||
| Long-term borrowings | 97,352 | [2] | 110,718 | [2] | ||||
| Commerical Unfunded Lending Commitments, Fair Value Disclosure | 95 | 208 | ||||||
|
Fair Value
|
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| Financial assets | ||||||||
| Loans, notes and mortgages | 19,554 | [1] | 20,048 | [1] | ||||
| Financial liabilities | ||||||||
| Deposits | 12,529 | 12,364 | ||||||
| Long-term borrowings | 98,930 | [2] | 102,339 | [2] | ||||
| Commerical Unfunded Lending Commitments, Fair Value Disclosure | 143 | 264 | ||||||
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Level 2 | Fair Value
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| Financial assets | ||||||||
| Loans, notes and mortgages | 563 | [1] | ||||||
| Financial liabilities | ||||||||
| Deposits | 12,529 | |||||||
| Long-term borrowings | 97,475 | [2] | ||||||
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Level 3 | Fair Value
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| Financial assets | ||||||||
| Loans, notes and mortgages | 18,991 | [1] | ||||||
| Financial liabilities | ||||||||
| Deposits | ||||||||
| Long-term borrowings | $ 1,455 | [2] | ||||||
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