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Benefit Plans (Narrative) (Details) - USD ($)
shares in Millions, $ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]        
Weighted average expected long-term rate of return on plan assets 7.00% 7.50% 7.75% 8.00%
Accrued income excluded from plan assets   $ 18 $ 23  
Defined contribution plan, employee contribution percentage, minimum   1.00%    
Defined contribution plan, employee contribution percentage, maximum   50.00%    
Defined contribution plan, employer matching contribution percentage of employee compensation, maximum   6.00%    
Defined contribution plan employer contribution amount   $ 114 $ 103 $ 102
BB&T Common Stock [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]        
Shares of BB&T stock held in pension plan   3.0 3.0  
Value of BB&T stock held in pension plan   $ 113 $ 117  
Qualified [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]        
Discretionary contributions made to the qualified pension plan $ 280      
U.S. Equity Securities [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]        
Defined benefit plan target allocation percentage of assets, range minimum   30.00%    
Defined benefit plan target allocation percentage of assets, range maximum   40.00%    
U.S. Equity Securities [Member] | BB&T Common Stock [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]        
Defined benefit plan target allocation percentage of assets, range maximum   10.00%    
International Equity Securities [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]        
Defined benefit plan target allocation percentage of assets, range minimum   10.00%    
Defined benefit plan target allocation percentage of assets, range maximum   18.00%    
Fixed Income Securities [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]        
Defined benefit plan target allocation percentage of assets, range minimum   35.00%    
Defined benefit plan target allocation percentage of assets, range maximum   50.00%    
Alternative Investments [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]        
Defined benefit plan target allocation percentage of assets, range minimum   0.00%    
Defined benefit plan target allocation percentage of assets, range maximum   12.00%