Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2011	Dec. 31, 2010
Common Stock
Common Stock, Par (in dollars per share)	$ 0.01	$ 0.01
Common Shares Issued	269,323,084	254,223,521
Shares Authorized	640,000,000	640,000,000
Treasury Stock
Common Stock Held in Treasury	303,633	146,186