Condensed Consolidated Statement of Stockholders' Equity (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended	7 Months Ended	12 Months Ended
	Mar. 31, 2012	Dec. 31, 2008	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Price per share of common stock issued for cash		$ 2.37		$ 2.60	$ 4.68
Price per share of common stock issued during conversion of short term borrowings					$ 2.96
Price per share of employee stock options exercised				$ 2.37	$ 2.37
Offering costs (in dollars)				$ 29.2
Price per share of common stock issued for investment	$ 31.218
Price per share of common stock based on a set dollar amount		$ 2.24
Price per share of common stock issued for noncontrolling interest			$ 45.60
Price per share on sale of Series A mandatory convertible preferred stock			$ 100.00
Common Stock
Price per share of stock sold				$ 14.00