| **Income Taxes (Details 5) (USD $)In Millions, unless otherwise specified** | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 |
|-----------------------------------------------------------------------------|---------------|---------------|---------------|
| **Net operating loss (NOL) carryforwards**                                  |          |          |          |
| Gross deferred income tax asset associated with NOL carryforwards           | $ 59          | $ 69          | $ 92          |
| U.S. state taxing jurisdictions                                             |          |          |          |
| **Net operating loss (NOL) carryforwards**                                  |          |          |          |
| NOL carryforwards                                                           | 205           |          |          |
| Gross deferred income tax asset associated with NOL carryforwards           | 16            |          |          |
| NOL carryforwards, Valuation allowance                                      | 5             |          |          |
| U.S. state taxing jurisdictions | Expiration Date 2013                      |          |          |          |
| **Net operating loss (NOL) carryforwards**                                  |          |          |          |
| NOL carryforwards                                                           | 0             |          |          |
| U.S. state taxing jurisdictions | Expiration Date 2014                      |          |          |          |
| **Net operating loss (NOL) carryforwards**                                  |          |          |          |
| NOL carryforwards                                                           | 0             |          |          |
| U.S. state taxing jurisdictions | Expiration Date 2015                      |          |          |          |
| **Net operating loss (NOL) carryforwards**                                  |          |          |          |
| NOL carryforwards                                                           | 0             |          |          |
| U.S. state taxing jurisdictions | Expiration Date 2016                      |          |          |          |
| **Net operating loss (NOL) carryforwards**                                  |          |          |          |
| NOL carryforwards                                                           | 0             |          |          |
| U.S. state taxing jurisdictions | Expiration Date 2017-2031                 |          |          |          |
| **Net operating loss (NOL) carryforwards**                                  |          |          |          |
| NOL carryforwards                                                           | 205           |          |          |
| Non-U.S. taxing jurisdictions                                               |          |          |          |
| **Net operating loss (NOL) carryforwards**                                  |          |          |          |
| NOL carryforwards                                                           | 188           |          |          |
| NOL carryforwards, Valuation allowance                                      | 4             |          |          |
| Non-U.S. taxing jurisdictions | Expiration Date 2013                        |          |          |          |
| **Net operating loss (NOL) carryforwards**                                  |          |          |          |
| NOL carryforwards                                                           | 0             |          |          |
| Non-U.S. taxing jurisdictions | Expiration Date 2014                        |          |          |          |
| **Net operating loss (NOL) carryforwards**                                  |          |          |          |
| NOL carryforwards                                                           | 3             |          |          |
| Non-U.S. taxing jurisdictions | Expiration Date 2015                        |          |          |          |
| **Net operating loss (NOL) carryforwards**                                  |          |          |          |
| NOL carryforwards                                                           | 4             |          |          |
| Non-U.S. taxing jurisdictions | Expiration Date 2016                        |          |          |          |
| **Net operating loss (NOL) carryforwards**                                  |          |          |          |
| NOL carryforwards                                                           | 1             |          |          |
| Non-U.S. taxing jurisdictions | Expiration Date 2017-2027                   |          |          |          |
| **Net operating loss (NOL) carryforwards**                                  |          |          |          |
| NOL carryforwards                                                           | 46            |          |          |
| Non-U.S. taxing jurisdictions | Unlimited                                   |          |          |          |
| **Net operating loss (NOL) carryforwards**                                  |          |          |          |
| NOL carryforwards                                                           | $ 134         |          |          |

| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The sum of domestic, foreign and state and local operating loss carryforwards, before tax effects, available to reduce future taxable income under enacted tax laws.
+ References
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| X                                                                                                                                                                       |
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The portion of the valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from net operating loss carryforwards for which it is more likely than not that a tax benefit will not be realized.
+ References
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