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Assets And Liabilities Measured At Fair Value Realized Unrealized Gain Loss (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | |
|---|---|---|
|
Mar. 31, 2014
|
Mar. 31, 2013
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Realized and unrealized gains (losses) on financial instruments, net | $ (25) | $ (73) |
|
Fair Value Option Securities
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||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Realized and unrealized gains (losses) on financial instruments, net | (10) | 224 |
|
Exchangeable Senior Debentures
|
||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Realized and unrealized gains (losses) on financial instruments, net | (15) | (310) |
|
Other Financial Instruments
|
||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Realized and unrealized gains (losses) on financial instruments, net | $ 0 | $ 13 |