Quarterly report pursuant to Section 13 or 15(d)

Derivatives - Narrative (Details)

v3.19.1
Derivatives - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Mar. 31, 2018
Dec. 31, 2017
Derivative [Line Items]        
Shareholders’ equity $ 267,010 $ 265,325 $ 266,224 $ 267,146
Net losses in AOCI expected to be reclassified, after tax 196      
Net losses in AOCI expected to be reclassified $ 258      
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) $ (1,700) (1,600)    
Interest rate risk on AFS securities        
Derivative [Line Items]        
Available-for-sale securities from discontinued hedging relationships cumulative increase (decrease) 2 (29)    
Credit derivatives        
Derivative [Line Items]        
Cash and securities held as collateral 80,200 81,600    
Cash and securities collateral posted 57,400 56,500    
Collateral not yet posted 2,300      
Aggregate fair value of derivative liability 0 0    
Credit derivatives | Bank of America, N.A.        
Derivative [Line Items]        
Collateral not yet posted 1,100      
Foreign Mortgage-backed Securities and Foreign Securities        
Derivative [Line Items]        
Transfer of mortgage-backed securities to third-party trust 5,700 5,800    
Gross cash proceeds from transfer of securities 5,600 5,800    
Fair value of derecognized assets 5,500 $ 5,500    
Derivatives        
Derivative [Line Items]        
Shareholders’ equity (787)      
Pretax loss $ 1,000