Quarterly report pursuant to Section 13 or 15(d)

DERIVATIVE FINANCIAL INSTRUMENTS - Asset and Liability Managemen Add Info (Details Add Info)

v3.5.0.2
DERIVATIVE FINANCIAL INSTRUMENTS - Asset and Liability Managemen Add Info (Details Add Info) - USD ($)
 6 Months Ended
Jun. 30, 2016
Dec. 31, 2015
Derivative [Line Items]    
Derivative, Notional Amount $ 11,525,000,000 $ 500,000,000
Additional information about the interest rate swaps used in companies Asset and Liability Management    
Notional Amount Of Interest Rate Derivatives $ 11,525,000,000  
Average Maturity (years) 1 year 10 months 24 days  
Fair Value $ 171,434,000  
Weighted-Average Rate Receive 1.28%  
Weighted-Average Rate Pay 0.64%  
Asset conversion swaps - Receive Fixed - Generic    
Additional information about the interest rate swaps used in companies Asset and Liability Management    
Notional Amount Of Interest Rate Derivatives $ 4,700,000,000  
Average Maturity (years) 9 months 18 days  
Fair Value $ 12,655,000  
Weighted-Average Rate Receive 0.96%  
Weighted-Average Rate Pay 0.62%  
Liability conversion swaps - Receive Fixed - Generic    
Additional information about the interest rate swaps used in companies Asset and Liability Management    
Notional Amount Of Interest Rate Derivatives $ 6,825,000,000  
Average Maturity (years) 2 years 7 months 6 days  
Fair Value $ 158,779,000  
Weighted-Average Rate Receive 1.50%  
Weighted-Average Rate Pay 0.65%  
Fair Value Hedging    
Derivative [Line Items]    
Derivative, Notional Amount $ 6,825,000,000  
Cash Flow Hedging    
Derivative [Line Items]    
Derivative, Notional Amount 4,700,000,000  
Loan    
Derivative [Line Items]    
Derivative, Notional Amount 4,700,000,000  
Loan | Fair Value Hedging    
Derivative [Line Items]    
Derivative, Notional Amount 0  
Loan | Cash Flow Hedging    
Derivative [Line Items]    
Derivative, Notional Amount 4,700,000,000  
Deposits    
Derivative [Line Items]    
Derivative, Notional Amount 0  
Deposits | Fair Value Hedging    
Derivative [Line Items]    
Derivative, Notional Amount 0  
Deposits | Cash Flow Hedging    
Derivative [Line Items]    
Derivative, Notional Amount 0  
Subordinated notes    
Derivative [Line Items]    
Derivative, Notional Amount 450,000,000  
Subordinated notes | Fair Value Hedging    
Derivative [Line Items]    
Derivative, Notional Amount 450,000,000  
Subordinated notes | Cash Flow Hedging    
Derivative [Line Items]    
Derivative, Notional Amount 0  
Other long term debt    
Derivative [Line Items]    
Derivative, Notional Amount 6,375,000,000  
Other long term debt | Fair Value Hedging    
Derivative [Line Items]    
Derivative, Notional Amount 6,375,000,000  
Other long term debt | Cash Flow Hedging    
Derivative [Line Items]    
Derivative, Notional Amount $ 0