Annual report pursuant to Section 13 and 15(d)

Statements of Consolidated Changes in Equity (Parenthetical)

v3.3.1.900
Statements of Consolidated Changes in Equity (Parenthetical) - $ / shares
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Class of Stock [Line Items]      
Common stock dividends per share $ 0.00 $ 0.60 $ 0.60
Preferred stock dividends per share $ 1.32 $ 1.76 $ 1.66