Quarterly report pursuant to Section 13 or 15(d)

DERIVATIVE FINANCIAL INSTRUMENTS - Asset and Liability Management (Details)

v3.5.0.2
DERIVATIVE FINANCIAL INSTRUMENTS - Asset and Liability Management (Details) - USD ($)
Jun. 30, 2016
Dec. 31, 2015
Notional Disclosures [Abstract]    
Derivative, Notional Amount $ 11,525,000,000 $ 500,000,000
Fair Value Hedging    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 6,825,000,000  
Cash Flow Hedging    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 4,700,000,000  
Loan    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 4,700,000,000  
Loan | Fair Value Hedging    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 0  
Loan | Cash Flow Hedging    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 4,700,000,000  
Deposits    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 0  
Deposits | Fair Value Hedging    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 0  
Deposits | Cash Flow Hedging    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 0  
Subordinated notes    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 450,000,000  
Subordinated notes | Fair Value Hedging    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 450,000,000  
Subordinated notes | Cash Flow Hedging    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 0  
Other long-term debt    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 6,375,000,000  
Other long-term debt | Fair Value Hedging    
Notional Disclosures [Abstract]    
Derivative, Notional Amount 6,375,000,000  
Other long-term debt | Cash Flow Hedging    
Notional Disclosures [Abstract]    
Derivative, Notional Amount $ 0