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Income Taxes (Narrative) (Details) (USD $)
In Millions, unless otherwise specified |
9 Months Ended |
|---|---|
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Sep. 30, 2014
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| Income Tax Disclosure [Abstract] | |
| Unrecognized Tax Benefits, Period Increase (Decrease) | $ (55) |
| Decrease in uncertain tax positions | 42 |
| Unrecognized Tax Benefits, Decrease Resulting from Foreign Currency Translation | $ 16 |