Assets And Liabilities Measured At Fair Value Realized Unrealized Gain Loss (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||
| Realized and unrealized gains (losses) on financial instruments, net | $ 114 | $ (57) | $ (22) |
| Fair Value Option Securities | |||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||
| Realized and unrealized gains (losses) on financial instruments, net | 84 | 173 | 514 |
| Exchangeable Senior Debentures | |||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||
| Realized and unrealized gains (losses) on financial instruments, net | $ 30 | $ (230) | (553) |
| Other Financial Instruments | |||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||
| Realized and unrealized gains (losses) on financial instruments, net | $ 17 | ||
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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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