Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Common Share - Dilutive Shares (Details)

v3.8.0.1
Earnings Per Common Share - Dilutive Shares (Details) - shares
shares in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Common Stock        
Class of Stock [Line Items]        
Incremental common shares attributable to dilutive effect of call options and warrants (in shares) 150 150 150 150
Series T Preferred Stock        
Class of Stock [Line Items]        
Incremental common shares attributable to dilutive effect of conversion of preferred stock (in shares)   700 700 700