Annual report pursuant to Section 13 and 15(d)

Earnings Per Common Share - Dilutive Shares (Details)

v3.6.0.2
Earnings Per Common Share - Dilutive Shares (Details) - shares
shares in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Common Stock      
Class of Stock [Line Items]      
Incremental common shares attributable to dilutive effect of call options and warrants (in shares) 150 150 150
Series T Preferred Stock      
Class of Stock [Line Items]      
Incremental common shares attributable to dilutive effect of conversion of preferred stock (in shares) 700 700