DERIVATIVE INSTRUMENTS - Summary of Characteristics of Interest Rate Swaps (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Interest rate swaps, at fair value
Derivative [Line Items]
Current Notional	$ 52,277,300,000	$ 45,907,300,000
Weighted Average Pay Rate	1.74%	0.59%
Weighted Average Receive Rate	4.28%	0.08%
Weighted Average Years to Maturity	5 years 3 months	3 years 3 months 25 days
Interest rate swaps, at fair value | LIBOR
Derivative [Line Items]
Nonmonetary notional amount, percentage	0.17	0.18
Interest rate swaps, at fair value | Federal Funds Rate
Derivative [Line Items]
Nonmonetary notional amount, percentage	0.23	0.53
Interest rate swaps, at fair value | Secured Overnight Financing Rate
Derivative [Line Items]
Nonmonetary notional amount, percentage	0.60	0.29
Interest rate swaps, at fair value | 0 - 3 years
Derivative [Line Items]
Minimum Maturity Period	0 years	0 years
Maximum Maturity Period	3 years	3 years
Current Notional	$ 26,355,700,000	$ 32,709,300,000
Weighted Average Pay Rate	0.88%	0.25%
Weighted Average Receive Rate	4.33%	0.06%
Weighted Average Years to Maturity	9 months	1 year 1 month 6 days
Interest rate swaps, at fair value | 3 - 6 years
Derivative [Line Items]
Minimum Maturity Period	3 years	3 years
Maximum Maturity Period	6 years	6 years
Current Notional	$ 1,120,400,000	$ 2,780,000,000
Weighted Average Pay Rate	2.53%	0.21%
Weighted Average Receive Rate	3.95%	0.07%
Weighted Average Years to Maturity	4 years 25 days	3 years 5 months 15 days
Interest rate swaps, at fair value | 6 - 10 years
Derivative [Line Items]
Minimum Maturity Period	6 years	6 years
Maximum Maturity Period	10 years	10 years
Current Notional	$ 22,492,200,000	$ 9,118,000,000
Weighted Average Pay Rate	2.54%	1.43%
Weighted Average Receive Rate	4.24%	0.13%
Weighted Average Years to Maturity	8 years 9 months 3 days	9 years 18 days
Interest rate swaps, at fair value | Greater than 10 years
Derivative [Line Items]
Minimum Maturity Period	10 years	10 years
Current Notional	$ 2,309,000,000	$ 1,300,000,000
Weighted Average Pay Rate	3.49%	4.04%
Weighted Average Receive Rate	4.26%	0.11%
Weighted Average Years to Maturity	22 years 11 months 4 days	18 years 8 months 12 days
Forward Starting Pay Fixed Swaps
Derivative [Line Items]
Current Notional	$ 0	$ 0