Assets And Liabilities Measured At Fair Value Realized Unrealized Gain Loss (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2015 |
Sep. 30, 2014 |
Sep. 30, 2015 |
Sep. 30, 2014 |
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | Ìý | Ìý | Ìý | Ìý |
| Realized and unrealized gains (losses) on financial instruments, net | $ 70 | $ 18 | $ 98 | $ (48) |
| Fair Value Option Securities | Ìý | Ìý | Ìý | Ìý |
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | Ìý | Ìý | Ìý | Ìý |
| Realized and unrealized gains (losses) on financial instruments, net | (78) | 1 | 70 | 81 |
| Exchangeable Senior Debentures | Ìý | Ìý | Ìý | Ìý |
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | Ìý | Ìý | Ìý | Ìý |
| Realized and unrealized gains (losses) on financial instruments, net | $ 148 | $ 17 | $ 28 | $ (129) |
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- Definition 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. No definition available.
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- Definition Amount of unrealized gain (loss) recognized in the income statement on unsold other securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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