Consolidated Balance Sheets (Parentheticals) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Preferred Stock, Par Value (in dollars per share)	$ 1	$ 1
Preferred Stock, Shares Authorized (in shares)	6,029,100	6,029,100
Preferred Stock, Shares Issued (in shares)	32,000	32,000
Preferred Stock, Shares Outstanding (in shares)	32,000	32,000
Preferred Stock, Aggregate Liquidation Preference	$ 800,000,000	$ 800,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	750,000,000	750,000,000
Common stock, shares issued (in shares)	425,034,113	413,430,756
Common stock, shares outstanding (in shares)	425,034,113	413,430,756