Fair Value Measurement - Quantitative Information - Liabilities (Details) - Level 3 - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Credit derivative liabilities, net
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Internal floor (as a percent)		0.088%
Credit derivative liabilities, net | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Hedge cost (as a percent)	0.179%	0.08%
Bank profit (as a percent)	0.537%	0.00%
Credit derivative liabilities, net | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Hedge cost (as a percent)	0.414%	0.371%
Bank profit (as a percent)	2.926%	1.878%
Credit derivative liabilities, net | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Hedge cost (as a percent)	0.256%	0.126%
Bank profit (as a percent)	1.029%	0.679%
Credit derivative liabilities, net | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total liabilities carried at fair value	$ (147)	$ (154)
Credit derivative liabilities, net | Valuation, Income Approach | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Year 1 loss estimates (as a percent)	0.00%	0.00%
Credit derivative liabilities, net | Valuation, Income Approach | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Year 1 loss estimates (as a percent)	92.50%	85.80%
Credit derivative liabilities, net | Valuation, Income Approach | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Year 1 loss estimates (as a percent)	2.60%	0.10%
FG VIEs' liabilities | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total liabilities carried at fair value	$ (282)	$ (289)
FG VIEs' liabilities | Valuation, Income Approach | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	1.50%	1.40%
FG VIEs' liabilities | Valuation, Income Approach | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	8.80%	8.00%
FG VIEs' liabilities | Valuation, Income Approach | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	5.20%	3.70%
FG VIEs' liabilities | CPR | Valuation, Income Approach | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	0.90%	0.90%
FG VIEs' liabilities | CPR | Valuation, Income Approach | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	25.90%	24.50%
FG VIEs' liabilities | CPR | Valuation, Income Approach | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	13.20%	13.30%
FG VIEs' liabilities | CDR | Valuation, Income Approach | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	1.00%	1.40%
FG VIEs' liabilities | CDR | Valuation, Income Approach | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	41.00%	26.90%
FG VIEs' liabilities | CDR | Valuation, Income Approach | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	7.00%	7.60%
FG VIEs' liabilities | Loss severity | Valuation, Income Approach | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	45.00%	45.00%
FG VIEs' liabilities | Loss severity | Valuation, Income Approach | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	100.00%	100.00%
FG VIEs' liabilities | Loss severity | Valuation, Income Approach | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	75.60%	81.60%
CLO obligations of CFEs | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total liabilities carried at fair value	$ (3,947)	$ (3,665)
Yield (as a percent)	1.60%	1.60%
CLO obligations of CFEs | Valuation, Income Approach | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	24.10%	13.70%
CLO obligations of CFEs | Valuation, Income Approach | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	3.20%	2.10%
Warehouse financing debt | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total liabilities carried at fair value	$ (19)	$ (23)
Yield (as a percent)	16.00%
Warehouse financing debt | Valuation, Income Approach | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		12.60%
Warehouse financing debt | Valuation, Income Approach | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		16.00%
Warehouse financing debt | Valuation, Income Approach | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		13.80%
Securitized borrowing | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total liabilities carried at fair value	$ (21)	$ (17)
Securitized borrowing | Discount Margin | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	24.30%	23.90%
Securitized borrowing | Market multiple-enterprise value/EBITDA | Valuation, Market Approach | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple-enterprise value/EBITDA	10.00
Securitized borrowing | Market multiple-enterprise value/EBITDA | Valuation, Market Approach | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple-enterprise value/EBITDA	11.00
Securitized borrowing | Market multiple-enterprise value/EBITDA | Valuation, Market Approach | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple-enterprise value/EBITDA	10.67
Liabilities of CIVs | Market multiple-enterprise value/revenue | Valuation, Market Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple-enterprise value/revenue		10.50
Other invested assets | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets carried at fair value	$ 5	$ 6