Annual report pursuant to Section 13 and 15(d)

Derivatives - Narrative (Details)

v3.10.0.1
Derivatives - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Derivative [Line Items]        
Shareholders’ equity $ (265,325) $ (267,146) $ (266,195) $ (255,615)
Net losses in AOCI expected to be reclassified, after tax 253      
Net losses in AOCI expected to be reclassified $ 332      
Terminated cash flow hedges, forecasted transaction hedging period 4 years      
Terminated cash flow hedges, maximum forecasted transaction hedging period 17 years      
Interest rate risk on long-term debt        
Derivative [Line Items]        
Long-term debt from discontinued hedging relationships cumulative increase (decrease) $ (1,600)      
Interest rate risk on AFS securities        
Derivative [Line Items]        
Available-for-sale securities from discontinued hedging relationships cumulative increase (decrease) (29)      
Credit derivatives        
Derivative [Line Items]        
Cash and securities held as collateral 81,600 77,200    
Cash and securities collateral posted 56,500 59,200    
Collateral not yet posted 1,800      
Aggregate fair value of derivative liability 0 0    
Credit derivatives | Bank of America, N.A.        
Derivative [Line Items]        
Collateral not yet posted 1,000      
Foreign Mortgage-backed Securities and Foreign Securities        
Derivative [Line Items]        
Transfer of mortgage-backed securities to third-party trust 5,800 6,000    
Gross cash proceeds from transfer of securities 5,800 6,000    
Fair value of derecognized assets 5,500 6,100    
Derivatives        
Derivative [Line Items]        
Shareholders’ equity 1,000 $ 831 $ 895 $ 1,077
Pretax loss $ 1,300