Quarterly report pursuant to Section 13 or 15(d)

Derivatives - Narrative (Details)

v3.7.0.1
Derivatives - Narrative (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2017
Dec. 31, 2016
Jun. 30, 2016
Dec. 31, 2015
Derivative [Line Items]        
Shareholders’ equity $ 270,987 $ 266,840 $ 267,426 $ 256,176
Net losses in AOCI expected to be reclassified, after tax 141      
Net losses in AOCI expected to be reclassified $ 226      
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 $ 43 43    
Derivative liability 7 10    
Cash and securities held as collateral 77,000 85,500    
Cash and securities collateral posted 67,200 71,100    
Collateral not yet posted 2,500      
Aggregate fair value of derivative liability 31      
Credit derivatives | Bank of America, N.A.        
Derivative [Line Items]        
Collateral not yet posted 1,800      
Foreign Mortgage-backed Securities and Foreign Securities        
Derivative [Line Items]        
Transfer of mortgage-backed securities to third-party trust 6,300 6,600    
Gross cash proceeds from transfer of securities 6,300 6,600    
Fair value of securities transferred 6,200 6,300    
Derivatives        
Derivative [Line Items]        
Shareholders’ equity (763) $ (895) $ (927) $ (1,077)
Accumulated other comprehensive income (loss) before tax $ (1,200)