Quarterly report pursuant to Section 13 or 15(d)

Accumulated Other Comprehensive Income (Loss) - Change in Accumulated OCI (Details)

v3.5.0.2
Accumulated Other Comprehensive Income (Loss) - Change in Accumulated OCI (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]          
Beginning Balance     $ 256,176 $ 243,476  
Cumulative adjustment for accounting change         $ 0
Net change $ 268 $ 1,476 3,657 1,209  
Ending Balance 270,083 255,861 270,083 255,861  
Debit Valuation Adjustments          
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]          
Beginning Balance     (611)    
Cumulative adjustment for accounting change         (1,226)
Net change     49 633  
Ending Balance (562) (593) (562) (593)  
Derivatives          
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]          
Beginning Balance     (1,077) (1,661)  
Net change     277 416  
Ending Balance (800) (1,245) (800) (1,245)  
Employee Benefit Plans          
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]          
Beginning Balance     (2,956) (3,350)  
Net change     29 77  
Ending Balance (2,927) (3,273) (2,927) (3,273)  
Foreign currency          
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]          
Beginning Balance     (792) (669)  
Net change     (17) (84)  
Ending Balance (809) (753) (809) (753)  
Total          
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]          
Beginning Balance     (5,358) (4,022)  
Cumulative adjustment for accounting change         $ (1,226)
Net change     3,657 1,209  
Ending Balance (1,701) (4,039) (1,701) (4,039)  
Debt securities | Available-for-sale debt securities          
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]          
Beginning Balance     16 1,641  
Net change     3,362 169  
Ending Balance 3,378 1,810 3,378 1,810  
Equity securities | Available-for-sale debt securities          
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]          
Beginning Balance     62 17  
Net change     (43) (2)  
Ending Balance $ 19 $ 15 $ 19 $ 15