Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments and Hedging Activities Schedule of Interest Rate Swap Receivers (Details)

v3.10.0.1
Derivative Instruments and Hedging Activities Schedule of Interest Rate Swap Receivers (Details) - USD ($)
9 Months Ended 12 Months Ended
Sep. 30, 2018
Dec. 31, 2017
Jun. 30, 2018
Sep. 30, 2017
Jun. 30, 2017
Dec. 31, 2016
Derivative [Line Items]            
Notional $ 41,330,283,000 $ 31,226,878,000 $ 28,618,861,000 $ 24,113,321,000 $ 16,988,116,000 $ 18,802,500,000
Interest Rate Swap [Member] | Short [Member]            
Derivative [Line Items]            
Notional $ 7,102,438,000 $ 5,561,990,000        
Weighted Average Variable Interest Rate 2.335% 1.462%        
Weighted Average Fixed Interest Rate 2.694% 2.211%        
Weighted Average Remaining Maturity 5 years 5 months 1 day 7 years 7 months 28 days        
Interest Rate Swap [Member] | Derivative Maturity Over Two And Within Three Years From Balance Sheet Date [Member] | Short [Member]            
Derivative [Line Items]            
Notional $ 250,000,000 $ 200,000,000        
Weighted Average Variable Interest Rate 2.347% 1.391%        
Weighted Average Fixed Interest Rate 2.258% 1.642%        
Weighted Average Remaining Maturity 1 year 3 months 21 days 2 years 7 months 6 days        
Interest Rate Swap [Member] | Derivative Maturity Over Three And Within Four Years From Balance Sheet Date [Member] | Short [Member]            
Derivative [Line Items]            
Notional $ 2,477,438,000 $ 500,000,000        
Weighted Average Variable Interest Rate 2.338% 1.357%        
Weighted Average Fixed Interest Rate 2.736% 1.327%        
Weighted Average Remaining Maturity 2 years 5 months 26 days 3 years 18 days        
Interest Rate Swap [Member] | Derivative Maturity Over Four Years From Balance Sheet Date [Member] | Short [Member]            
Derivative [Line Items]            
Notional $ 4,375,000,000 $ 4,861,990,000        
Weighted Average Variable Interest Rate 2.333% 1.475%        
Weighted Average Fixed Interest Rate 2.696% 2.325%        
Weighted Average Remaining Maturity 7 years 3 months 25 days 8 years 4 months 2 days