Fair Value Measurement - Quantitative Information - Liabilities (Details) - Level 3 - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Equity securities and warrants | Valuation, Income Approach | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	10.00%	7.70%
Credit derivative liabilities, net (1)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value inputs internal floor		880.00%
Credit derivative liabilities, net (1) | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total liabilities carried at fair value	$ (162)	$ (154)
Credit derivative liabilities, net (1) | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value inputs hedge cost		800.00%
Fair value inputs bank profit	5100.00%	0.00%
Credit derivative liabilities, net (1) | Minimum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Year 1 loss estimates (as a percent)		0.00%
Fair value inputs hedge cost	11.50%
Credit derivative liabilities, net (1) | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value inputs hedge cost		3710.00%
Fair value inputs bank profit	27050.00%	18780.00%
Credit derivative liabilities, net (1) | Maximum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Year 1 loss estimates (as a percent)		85.80%
Fair value inputs hedge cost	25.20%
Credit derivative liabilities, net (1) | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value inputs hedge cost		1260.00%
Fair value inputs bank profit	10940.00%	6790.00%
Credit derivative liabilities, net (1) | Weighted Average | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Year 1 loss estimates (as a percent)		0.10%
Fair value inputs hedge cost	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	$ (715)	$ (289)
Financial Guarantee Variable Interest Entities | Minimum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	4.80%	1.40%
Financial Guarantee Variable Interest Entities | Maximum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	10.90%	8.00%
Financial Guarantee Variable Interest Entities | Weighted Average | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	5.90%	3.70%
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)	$ (3,665)
Consolidated Investment Vehicles | CLO contracts | Minimum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	3.00%	1.60%
Consolidated Investment Vehicles | CLO contracts | Maximum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	27.40%	13.70%
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%	2.10%
Consolidated Investment Vehicles | Borrowings | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total liabilities carried at fair value	$ (28)	$ (17)
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)	$ (23)
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%	12.60%
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%	16.00%
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%	13.80%
Discount rate | Equity securities and warrants | Minimum | Valuation, Income Approach | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	19.80%	14.70%
Discount rate | Equity securities and warrants | Maximum | Valuation, Income Approach | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	25.10%	23.90%
Discount rate | Equity securities and warrants | Weighted Average | Valuation, Income Approach | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	22.70%	21.60%
Discount rate | Consolidated Investment Vehicles | Borrowings | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	20.90%	23.90%
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)	0.90%	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)	21.90%	24.50%
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)	6.30%	13.30%
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%	1.40%
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%	26.90%
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)	3.70%	7.60%
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)	39.90%	81.60%
Multiple enterprise/revenue value | Equity securities and warrants | Valuation, Market Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple-enterprise value/revenue		1.10
Multiple enterprise/revenue value | Equity securities and warrants | Valuation, Market Approach | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple-price to book		185.00%
Multiple enterprise/revenue value | Equity securities and warrants | Minimum | Valuation, Market Approach | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple-enterprise value/revenue	1.05
Market multiple-price to book	115.00%
Multiple enterprise/revenue value | Equity securities and warrants | Maximum | Valuation, Market Approach | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple-enterprise value/revenue	1.10
Multiple enterprise/revenue value | Equity securities and warrants | Weighted Average | Valuation, Market Approach | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple-enterprise value/revenue	1.08
Multiple enterprise/revenue value | Consolidated Investment Vehicles | Borrowings | Valuation, Market Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple-enterprise value/revenue		10.50
Measurement Input, EBITDA Multiple | Equity securities and warrants | Minimum | Valuation, Market Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple - enterprise value/EBITDA		3.00
Measurement Input, EBITDA Multiple | Equity securities and warrants | Minimum | Valuation, Market Approach | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple - enterprise value/EBITDA	2.50
Measurement Input, EBITDA Multiple | Equity securities and warrants | Maximum | Valuation, Market Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple - enterprise value/EBITDA		10.50
Measurement Input, EBITDA Multiple | Equity securities and warrants | Maximum | Valuation, Market Approach | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple - enterprise value/EBITDA	11.00
Measurement Input, EBITDA Multiple | Equity securities and warrants | Weighted Average | Valuation, Market Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple - enterprise value/EBITDA		8.95
Measurement Input, EBITDA Multiple | Equity securities and warrants | Weighted Average | Valuation, Market Approach | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple - enterprise value/EBITDA	10.25
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	10.00
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	11.00
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 | Equity securities and warrants | Minimum | Valuation, Income Approach | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	3.00%
Measurement Input, Long-Term Revenue Growth Rate | Equity securities and warrants | Maximum | Valuation, Income Approach | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	4.00%
Measurement Input, Long-Term Revenue Growth Rate | Equity securities and warrants | Weighted Average | Valuation, Income Approach | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	3.50%
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)	3.00%
Measurement Input, Exit Multiple, EBITDA | Equity securities and warrants | Minimum | Valuation, Market Approach | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	800.00%
Measurement Input, Exit Multiple, EBITDA | Equity securities and warrants | Maximum | Valuation, Market Approach | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	1200.00%
Measurement Input, Exit Multiple, EBITDA | Equity securities and warrants | Weighted Average | Valuation, Market Approach | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	1053.00%
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%