Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2016	Dec. 31, 2015
Common Stock
Common Stock, Par Value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, Shares Authorized (in shares)	640,000,000	640,000,000
Common Stock, Shares Issued (in shares)	551,425,785	550,150,823
Treasury Stock (in shares)
Common Stock Held in Treasury, Shares	197,181	292,179