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