Annual report pursuant to Section 13 and 15(d)

Earnings Per Common Share - Dilutive Shares (Details)

v3.3.1.900
Earnings Per Common Share - Dilutive Shares (Details) - USD ($)
shares in Millions, $ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Class of Stock [Line Items]      
Noncash dividends     $ 100
Common Stock      
Class of Stock [Line Items]      
Incremental common shares attributable to dilutive effect of call options and warrants 150 150  
Series T Preferred Stock      
Class of Stock [Line Items]      
Incremental common shares attributable to dilutive effect of conversion of preferred stock   700