v3.3.1.900
Parent Company (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Non-interest revenues                      
Gain on sale of securities                 $ 1 $ 100 $ 136
Other                 2,033 2,989 2,274
Total non-interest revenues                 26,896 28,716 27,823
Interest income                 7,545 7,179 7,005
Interest expense                 (1,623) (1,707) (1,958)
Total revenues net of interest expense $ 8,391 $ 8,193 $ 8,284 $ 7,950 $ 9,081 $ 8,303 $ 8,631 $ 8,173 32,818 34,188 32,870
Expenses                      
Salaries and employee benefits                 4,976 6,095 6,191
Other                 6,793 6,089 6,796
Total                 22,892 23,153 23,150
Pretax loss 1,454 1,938 2,230 2,316 2,225 2,246 2,312 2,208 7,938 8,991 7,888
Income tax provision (benefit)                 2,775 3,106 2,529
Net income $ 899 $ 1,266 $ 1,473 $ 1,525 $ 1,447 $ 1,477 $ 1,529 $ 1,432 5,163 5,885 5,359
Parent Company [Member]                      
Non-interest revenues                      
Gain on sale of securities                 0 99 135
Other                 400 270 5
Total non-interest revenues                 400 369 140
Interest income                 172 141 134
Interest expense                 (526) (543) (583)
Total revenues net of interest expense                 46 (33) (309)
Expenses                      
Salaries and employee benefits                 341 275 206
Other                 443 357 261
Total                 784 632 467
Pretax loss                 (738) (665) (776)
Income tax provision (benefit)                 (268) (249) (297)
Net loss before equity in net income of subsidiaries and affiliates                 (470) (416) (479)
Equity in net income of subsidiaries and affiliates                 5,633 6,301 5,838
Net income                 $ 5,163 $ 5,885 $ 5,359