| **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
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43, 289 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6969291&loc=d3e28680-109314
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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
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 48 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
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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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