Quarterly report pursuant to Section 13 or 15(d)

Derivatives - Narrative (Details)

v3.7.0.1
Derivatives - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Mar. 31, 2016
Dec. 31, 2015
Derivative [Line Items]        
Shareholders’ equity $ 268,153 $ 266,840 $ 263,004 $ 256,176
Net losses in AOCI expected to be reclassified, after tax 188      
Net losses in AOCI expected to be reclassified $ 301      
Terminated cash flow hedges, forecasted transaction hedging period 7 years      
Terminated cash flow hedges, maximum forecasted transaction hedging period 19 years      
Credit derivatives        
Derivative [Line Items]        
Derivative asset $ 42   43  
Derivative liability 12   10  
Cash and securities held as collateral 77,100 85,500    
Cash and securities collateral posted 64,000 71,100    
Collateral not yet posted 2,400      
Aggregate fair value of derivative liability 41      
Credit derivatives | Bank of America, N.A.        
Derivative [Line Items]        
Collateral not yet posted 1,200      
Credit derivatives | Purchased credit derivatives        
Derivative [Line Items]        
Carrying value of written credit derivatives 2,600 4,700    
Notional amount of written credit derivatives 486,600 490,700    
Foreign Mortgage-backed Securities and Foreign Securities        
Derivative [Line Items]        
Transfer of mortgage-backed securities to third-party trust 6,500   6,600  
Gross cash proceeds from transfer of securities 6,500   6,600  
Fair value of securities transferred 6,200   6,300  
Derivatives        
Derivative [Line Items]        
Shareholders’ equity (857) $ (895) $ (1,053) $ (1,077)
Accumulated other comprehensive income (loss) before tax $ (1,400)