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Derivative Instruments and Hedging Activities Schedule of Interest Rate Swaptions (Details) - USD ($)
Dec. 31, 2021
Sep. 30, 2022
Jun. 30, 2022
Sep. 30, 2021
Jun. 30, 2021
Dec. 31, 2020
Derivative [Line Items]            
Notional $ (17,159,801,000) $ (10,936,326,000) $ (2,978,027,000) $ (20,187,509,000) $ (23,094,926,000) $ (23,932,603,000)
Percentage of Underlying Swaps Tied to LIBOR 100.00%          
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)          
Fair Value $ (3,539,000)          
Weighted Average Remaining Maturity 5 months 10 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)          
Weighted Average Remaining Maturity 1 year 5 months 24 days          
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)          
Fair Value $ (6,856,000)          
Weighted Average Remaining Maturity 5 months 3 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          
Notional $ (886,000,000)          
Weighted Average Fixed Interest Rate 2.26%          
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)          
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          
Notional $ (1,087,000,000)          
Weighted Average Fixed Interest Rate 1.26%          
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)          
Weighted Average Fixed Interest Rate 1.72%