Annual report pursuant to Section 13 and 15(d)

Earnings Per Common Share - Antidilutive Securities (Details)

v3.6.0.2
Earnings Per Common Share - Antidilutive Securities (Details) - shares
shares in Millions
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Stock Options      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Average options to purchase shares of common stock (in shares) 45 66 91
Common Stock | Warrant      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Average options to purchase shares of common stock (in shares) 122 122 122
Series T Preferred Stock | Warrant      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Average options to purchase shares of common stock (in shares)     700
Series L Preferred Stock | Convertible Preferred Stock Subject to Mandatory Redemption      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Average options to purchase shares of common stock (in shares) 62 62 62