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Fair Value Measurement - Quantitative Information - Liabilities (Details) - Level 3 - USD ($) $ in Millions | 12 Months Ended
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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% |

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- Definition Estimated rate of prepayment of principal on financial assets for initial fair value measurement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c)(2) -URI https://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719 + Details
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