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Assets And Liabilities Measured At Fair Value Assets and Liabilities Measured at Fair Value (Realized and Unrealized Gains (Losses) on Financial Assets (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 3 Months Ended | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Mar. 31, 2014
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Mar. 31, 2013
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Oct. 17, 2013
1.375% Cash Convertible Senior Notes due 2023
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Mar. 31, 2014
Fair Value Option Securities
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Mar. 31, 2013
Fair Value Option Securities
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Mar. 31, 2014
Convertible Notes Payable
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Mar. 31, 2013
Convertible Notes Payable
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Mar. 31, 2014
Other Financial Instruments
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Mar. 31, 2013
Other Financial Instruments
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |||||||||||||||||
| Realized and unrealized (gains) losses on financial instruments, net | $ (65) | $ 97 | $ (15) | $ 82 | $ 59 | [1] | $ 0 | [1] | $ (109) | [2] | $ 15 | [2] | |||||
| Debt face amount | $ 4,719 | $ 1,000 | |||||||||||||||
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