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Derivative Instruments and Hedging Activities Schedule of Interest Rate Swap Payers (Details) - USD ($)
3 Months Ended 6 Months Ended
Mar. 31, 2020
Jun. 30, 2020
Dec. 31, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Derivative [Line Items]            
Notional $ 60,549,307,000 $ 8,076,933,000 $ 48,445,497,000 $ 55,549,424,000 $ 58,777,783,000 $ 36,528,169,000
Interest Rate Swap [Member] | Long [Member]            
Derivative [Line Items]            
Notional   $ 3,779,000,000 $ 30,913,709,000      
Weighted Average Variable Interest Rate   0.08% 1.921%      
Weighted Average Remaining Maturity 3 years 1 month 20 days 4 years 6 months 25 days        
Weighted Average Fixed Interest Rate   0.116% 1.878%      
Interest Rate Swap [Member] | Derivative Maturity Within One Year From Balance Sheet Date [Member] | Long [Member]            
Derivative [Line Items]            
Notional     $ 3,640,000,000      
Weighted Average Variable Interest Rate     1.937%      
Weighted Average Remaining Maturity 9 months 29 days          
Weighted Average Fixed Interest Rate     1.806%      
Interest Rate Swap [Member] | Derivative Maturity Over One And Within Two Years From Balance Sheet Date [Member] | Long [Member]            
Derivative [Line Items]            
Notional     $ 15,740,977,000      
Weighted Average Variable Interest Rate     1.91%      
Weighted Average Remaining Maturity 1 year 5 months 19 days          
Weighted Average Fixed Interest Rate     1.681%      
Interest Rate Swap [Member] | Derivative Maturity Over Two And Within Three Years From Balance Sheet Date [Member] | Long [Member]            
Derivative [Line Items]            
Notional     $ 2,578,640,000      
Weighted Average Variable Interest Rate     1.901%      
Weighted Average Remaining Maturity 2 years 8 months 26 days          
Weighted Average Fixed Interest Rate     1.911%      
Interest Rate Swap [Member] | Derivative Maturity Over Three And Within Four Years From Balance Sheet Date [Member] | Long [Member]            
Derivative [Line Items]            
Notional   $ 2,281,500,000 $ 215,000,000      
Weighted Average Variable Interest Rate   0.08% 1.91%      
Weighted Average Remaining Maturity 3 years 10 months 24 days 2 years 11 months 23 days        
Weighted Average Fixed Interest Rate   0.023% 3.057%      
Interest Rate Swap [Member] | Derivative Maturity Over Four Years From Balance Sheet Date [Member] | Long [Member]            
Derivative [Line Items]            
Notional   $ 1,497,500,000 $ 8,739,092,000      
Weighted Average Variable Interest Rate   0.08% 1.935%      
Weighted Average Remaining Maturity 7 years 2 months 12 days 6 years 11 months 26 days        
Weighted Average Fixed Interest Rate   0.257% 2.224%