Assets And Liabilities Measured At Fair Value Realized Unrealized Gain Loss (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2015 |
Jun. 30, 2014 |
Jun. 30, 2015 |
Jun. 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 | $ 32 | $ (41) | $ 28 | $ (66) |
| 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 | 165 | 90 | 148 | 80 |
| 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 | $ (133) | $ (131) | $ (120) | $ (146) |
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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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