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Income Taxes (Details Textual) (USD $) Share data in Millions, except Per Share data, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Additional Income Taxes (Textual) [Abstract] |  |  |
Number of common shares | 18 |  |
Post-split price of common shares | $ 17.86 |  |
Gross deferred tax assets | $ 867,800,000 | $ 489,400,000 |
Valuation allowance | (219,100,000) | (43,100,000) |
Valuation allowance, tax-effected basis | 110,000,000 |  |
Valuation allowance, foreign net operating loss carry forwards | 124,500,000.00000 | 33,900,000.00000 |
Foreign and federal tax credits and investment tax allowances | 104,000,000 |  |
State net operating loss carry forwards | 908,000,000 |  |
State net operating loss on tax effected basis | 42,000,000 |  |
State tax credits | 13,000,000 |  |
Valuation allowance due | 162,000,000 |  |
Valuation allowance charged to costs and expenses | 3,000,000 |  |
Net increase in deferred tax assets | 11,000,000 |  |
Percentage increase in deferred tax assets | 100.00% |  |
Increase (decrease) in valuation allowance | 176,000,000 | (4,000,000) | 7,000,000
Income tax effects allocated directly to equity deferred income tax | 6,000,000 | (5,000,000) | 4,000,000
Decrease in income tax provision if unrecognized tax benefits were recognized | 201,000,000 |  |
Unrecognized interest and penalties | 32,000,000 | 4,000,000 |
Unrecognized penalties | 15,000,000 | 2,000,000 |
Interest and penalties, gross recognized in connection | 1,500,000.00000 |  |
Interest and penalties, net recognized in connection | 1,500,000 |  |
Interest and penalties, gross reserved in connection | 500,000.00000 |  |
Interest and penalties, net reserved in connection | 500,000.00000 |  |
State net operating loss carryforwards expire | one to 20 years |  |
State tax credit carryforwards expire | over one to 20 years |  |
Reduction in unrecognized tax benefits | 20,000,000 |  |
Federal [Member] |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
2015 | 8,000,000 |  |
2016 | 20,000,000 |  |
2017 and beyond | 60,000,000 |  |
Foreign and federal foreign tax credit carryforwards | 108,000,000 |  |
Foreign [Member] |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Foreign net operating loss carryforwards | 409,000,000 |  |
2012 | 2,000,000 |  |
2013 | 20,000,000 |  |
2014 | 7,000,000 |  |
2015 | 22,000,000 |  |
2016 | 15,000,000 |  |
2017 and Beyond | 84,000,000 |  |
No expiration | 259,000,000 |  |
State [Member] |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Foreign net operating loss carryforwards | 908,000,000 |  |
Foreign and federal foreign tax credit carryforwards | 13,000,000 |  |
No expiration | $ 20,000,000 |  |
Maximum [Member] |  |  |
Income Taxes (Textual) [Abstract] |  |  |
Examination of income tax return | 5 years |  |
Income tax return in foreign jurisdictions | 5 years |  |
Minimum [Member] |  |  |
Income Taxes (Textual) [Abstract] |  |  |
Examination of income tax return | 3 years |  |
Income tax return in foreign jurisdictions | 3 years |  |

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