Fair Value Measurement - Quantitative Information - Liabilities (Details) - Level 3 - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Credit derivative liabilities, net
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value inputs internal floor	0.10%
Credit derivative liabilities, net | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total liabilities carried at fair value	$ (50)	$ (162)
Credit derivative liabilities, net | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value inputs bank profit	1.056%	0.51%
Credit derivative liabilities, net | Minimum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value inputs hedge cost	10.20%	11.50%
Credit derivative liabilities, net | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value inputs bank profit	3.026%	2.705%
Credit derivative liabilities, net | Maximum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value inputs hedge cost	26.50%	25.20%
Credit derivative liabilities, net | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value inputs bank profit	1.586%	1.094%
Credit derivative liabilities, net | Weighted Average | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value inputs hedge cost	15.80%	15.70%
Financial Guarantee Variable Interest Entities | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total liabilities carried at fair value	$ (554)	$ (715)
Financial Guarantee Variable Interest Entities | Minimum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	5.00%	4.80%
Financial Guarantee Variable Interest Entities | Maximum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	10.70%	10.90%
Financial Guarantee Variable Interest Entities | Weighted Average | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	5.80%	5.90%
Consolidated Investment Vehicles | CLO contracts | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total liabilities carried at fair value		$ (4,090)
Consolidated Investment Vehicles | CLO contracts | Minimum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		3.00%
Consolidated Investment Vehicles | CLO contracts | Maximum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		27.40%
Consolidated Investment Vehicles | CLO contracts | Weighted Average | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		5.50%
Consolidated Investment Vehicles | Warehouse Financing Debt | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total liabilities carried at fair value		$ (36)
Consolidated Investment Vehicles | Warehouse Financing Debt | Minimum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		11.70%
Consolidated Investment Vehicles | Warehouse Financing Debt | Maximum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		16.90%
Consolidated Investment Vehicles | Warehouse Financing Debt | Weighted Average | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		12.90%
Consolidated Investment Vehicles | Borrowings | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total liabilities carried at fair value		$ (28)
CPR | Financial Guarantee Variable Interest Entities | Minimum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate (as a percent)	0.20%	0.90%
CPR | Financial Guarantee Variable Interest Entities | Maximum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate (as a percent)	21.40%	21.90%
CPR | Financial Guarantee Variable Interest Entities | Weighted Average | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate (as a percent)	7.80%	6.30%
CDR | Financial Guarantee Variable Interest Entities | Minimum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate (as a percent)	1.30%	1.30%
CDR | Financial Guarantee Variable Interest Entities | Maximum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate (as a percent)	41.00%	41.00%
CDR | Financial Guarantee Variable Interest Entities | Weighted Average | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate (as a percent)	10.40%	3.70%
Loss severity | Financial Guarantee Variable Interest Entities | Minimum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate (as a percent)	45.00%	45.00%
Loss severity | Financial Guarantee Variable Interest Entities | Maximum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate (as a percent)	100.00%	100.00%
Loss severity | Financial Guarantee Variable Interest Entities | Weighted Average | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate (as a percent)	82.90%	39.90%
Measurement Input, EBITDA Multiple | Consolidated Investment Vehicles | Borrowings | Minimum | Valuation, Market Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple - enterprise value/EBITDA		10
Measurement Input, EBITDA Multiple | Consolidated Investment Vehicles | Borrowings | Maximum | Valuation, Market Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple - enterprise value/EBITDA		11
Measurement Input, EBITDA Multiple | Consolidated Investment Vehicles | Borrowings | Weighted Average | Valuation, Market Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple - enterprise value/EBITDA		10.50
Measurement Input, Long-Term Revenue Growth Rate | Consolidated Investment Vehicles | Borrowings | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		300.00%
Measurement Input, Exit Multiple, EBITDA | Consolidated Investment Vehicles | Borrowings | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		1100.00%
Measurement Input, Discount Rate | Consolidated Investment Vehicles | Borrowings | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		20.90%