Assets And Liabilities Measured At Fair Value (Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 6 Months Ended | |||
---|---|---|---|---|---|
Jun. 30, 2013
|
Jun. 30, 2012
|
Jun. 30, 2013
|
Jun. 30, 2012
|
Dec. 31, 2012
|
|
Gain (Loss) on Derivative Instruments, Net, Pretax | $ 9 | $ (160) | $ (64) | $ (178) | Ìý |
Cash and Cash Equivalents, Fair Value Disclosure | 1,087 | Ìý | 1,087 | Ìý | Ìý |
Short term marketable securities | 508 | Ìý | 508 | Ìý | 186 |
Available-for-sale securities | 1,361 | Ìý | 1,361 | Ìý | Ìý |
Debt | 1,879 | Ìý | 1,879 | Ìý | Ìý |
Quoted Prices In Active Markets For Identical Assets (Level 1)
|
Ìý | Ìý | Ìý | Ìý | Ìý |
Cash and Cash Equivalents, Fair Value Disclosure | 1,053 | Ìý | 1,053 | Ìý | Ìý |
Short term marketable securities | 0 | Ìý | 0 | Ìý | Ìý |
Available-for-sale securities | 869 | Ìý | 869 | Ìý | Ìý |
Debt | 0 | Ìý | 0 | Ìý | Ìý |
Significant Other Observable Inputs (Level 2)
|
Ìý | Ìý | Ìý | Ìý | Ìý |
Cash and Cash Equivalents, Fair Value Disclosure | 34 | Ìý | 34 | Ìý | Ìý |
Short term marketable securities | 508 | Ìý | 508 | Ìý | Ìý |
Available-for-sale securities | 492 | Ìý | 492 | Ìý | Ìý |
Debt | 1,879 | Ìý | 1,879 | Ìý | Ìý |
Fair Value, Inputs, Level 3 [Member]
|
Ìý | Ìý | Ìý | Ìý | Ìý |
Cash and Cash Equivalents, Fair Value Disclosure | 0 | Ìý | 0 | Ìý | Ìý |
Short term marketable securities | 0 | Ìý | 0 | Ìý | Ìý |
Available-for-sale securities | 0 | Ìý | 0 | Ìý | Ìý |
Debt | 0 | Ìý | 0 | Ìý | Ìý |
Fair Value Opition Securities [Member]
|
Ìý | Ìý | Ìý | Ìý | Ìý |
Gain (Loss) on Derivative Instruments, Net, Pretax | $ 112 | $ 41 | $ 336 | $ 181 | Ìý |