Annual report pursuant to Section 13 and 15(d)

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

v3.3.1.900
Accumulated Other Comprehensive Income (Loss) - Change in Accumulated OCI (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Beginning Balance $ 243,471 $ 232,685 $ 236,956
Cumulative adjustment for accounting change 0    
Net change (128) 4,137 (5,660)
Ending Balance 256,205 243,471 232,685
Debit Valuation Adjustments      
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Cumulative adjustment for accounting change (1,226)    
Net change 615    
Ending Balance (611)    
Derivatives      
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Beginning Balance (1,661) (2,277) (2,869)
Cumulative adjustment for accounting change 0    
Net change 584 616 592
Ending Balance (1,077) (1,661) (2,277)
Employee Benefit Plans      
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Beginning Balance (3,350) (2,407) (4,456)
Cumulative adjustment for accounting change 0    
Net change 394 (943) 2,049
Ending Balance (2,956) (3,350) (2,407)
Foreign currency      
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Beginning Balance (669) (512) (377)
Cumulative adjustment for accounting change 0    
Net change (123) (157) (135)
Ending Balance (792) (669) (512)
Accumulated Other Comprehensive Income (Loss)      
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Beginning Balance (4,320) (8,457) (2,797)
Cumulative adjustment for accounting change (1,226)    
Net change (128) 4,137 (5,660)
Ending Balance (5,674) (4,320) (8,457)
Debt securities | Available-for-sale debt securities      
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Beginning Balance 1,343 (3,257) 4,443
Cumulative adjustment for accounting change 0    
Net change (1,643) 4,600 (7,700)
Ending Balance (300) 1,343 (3,257)
Equity securities | Available-for-sale debt securities      
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Beginning Balance 17 (4) 462
Cumulative adjustment for accounting change 0    
Net change 45 21 (466)
Ending Balance $ 62 $ 17 $ (4)