Annual report pursuant to Section 13 and 15(d)

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

v3.22.0.1
Derivative Instruments and Hedging Activities Schedule of Interest Rate Swaptions (Details) - USD ($)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Derivative [Line Items]      
Notional $ (17,159,801,000) $ (23,932,603,000) $ (48,445,497,000)
Interest Rate Swaption [Member] | Long [Member] | Variable Income Interest Rate [Member] | Less Than Six Months Remaining Maturity [Member]      
Derivative [Line Items]      
Cost Basis (11,314,000) (7,210,000)  
Fair Value $ (3,539,000) $ (2,448,000)  
Weighted Average Remaining Maturity 5 months 10 days 4 months 7 days  
Interest Rate Swaption [Member] | Long [Member] | Fixed Income Interest Rate [Member] | Less Than Six Months Remaining Maturity [Member]      
Derivative [Line Items]      
Cost Basis   $ (3,010,000)  
Fair Value   $ 0  
Weighted Average Remaining Maturity   29 days  
Interest Rate Swaption [Member] | Short [Member] | Variable Income Interest Rate [Member] | Greater than or Equal to Six Months Remaining Maturity      
Derivative [Line Items]      
Cost Basis $ (26,329,000)    
Fair Value (23,958,000)    
Interest Rate Swaption [Member] | Short [Member] | Fixed Income Interest Rate [Member] | Less Than Six Months Remaining Maturity [Member]      
Derivative [Line Items]      
Cost Basis (10,640,000) $ (2,600,000)  
Fair Value $ (6,856,000) $ (3,044,000)  
Weighted Average Remaining Maturity 5 months 3 days 5 months 4 days  
Interest Rate Swaption [Member] | Short [Member] | Fixed Income Interest Rate [Member] | Greater than or Equal to Six Months Remaining Maturity      
Derivative [Line Items]      
Cost Basis $ (26,329,000)    
Fair Value $ (24,468,000)    
Weighted Average Remaining Maturity 1 year 6 months 28 days    
Underlying Swap [Member] | Long [Member] | Variable Income Interest Rate [Member] | Less Than Six Months Remaining Maturity [Member]      
Derivative [Line Items]      
Weighted Average Remaining Maturity 10 years 10 years  
Notional $ (886,000,000) $ (2,800,000,000)  
Underlying Swap [Member] | Long [Member] | Variable Income Interest Rate [Member] | Less Than Six Months Remaining Maturity [Member] | London Interbank Offered Rate (LIBOR) [Member]      
Derivative [Line Items]      
Weighted Average Fixed Interest Rate 2.26% 1.32%  
Underlying Swap [Member] | Long [Member] | Fixed Income Interest Rate [Member] | Less Than Six Months Remaining Maturity [Member]      
Derivative [Line Items]      
Weighted Average Remaining Maturity   10 years  
Notional   $ (2,000,000,000)  
Underlying Swap [Member] | Long [Member] | Fixed Income Interest Rate [Member] | Less Than Six Months Remaining Maturity [Member] | London Interbank Offered Rate (LIBOR) [Member]      
Derivative [Line Items]      
Weighted Average Fixed Interest Rate   0.23%  
Underlying Swap [Member] | Short [Member] | Variable Income Interest Rate [Member] | Greater than or Equal to Six Months Remaining Maturity      
Derivative [Line Items]      
Weighted Average Remaining Maturity 10 years    
Notional $ (780,000,000)    
Underlying Swap [Member] | Short [Member] | Variable Income Interest Rate [Member] | Greater than or Equal to Six Months Remaining Maturity | London Interbank Offered Rate (LIBOR) [Member]      
Derivative [Line Items]      
Weighted Average Fixed Interest Rate 1.72%    
Underlying Swap [Member] | Short [Member] | Fixed Income Interest Rate [Member] | Less Than Six Months Remaining Maturity [Member]      
Derivative [Line Items]      
Weighted Average Remaining Maturity 10 years 10 years  
Notional $ (1,087,000,000) $ (1,050,000,000)  
Underlying Swap [Member] | Short [Member] | Fixed Income Interest Rate [Member] | Less Than Six Months Remaining Maturity [Member] | London Interbank Offered Rate (LIBOR) [Member]      
Derivative [Line Items]      
Weighted Average Fixed Interest Rate 1.26% 0.55%  
Underlying Swap [Member] | Short [Member] | Fixed Income Interest Rate [Member] | Greater than or Equal to Six Months Remaining Maturity      
Derivative [Line Items]      
Weighted Average Remaining Maturity 10 years    
Notional $ (780,000,000)    
Underlying Swap [Member] | Short [Member] | Fixed Income Interest Rate [Member] | Greater than or Equal to Six Months Remaining Maturity | London Interbank Offered Rate (LIBOR) [Member]      
Derivative [Line Items]      
Weighted Average Fixed Interest Rate 1.72%