Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Common Share - Narrative (Details)

Earnings Per Common Share - Narrative (Details) - shares
shares in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Series L Preferred Stock | Convertible Preferred Stock Subject to Mandatory Redemption    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Securities excluded from computation of earnings per share (in shares) 62 62
Common Stock | Warrant    
Dilutive Securities    
Incremental common shares attributable to dilutive effect of call options and warrants (in shares)   14