Fair Value Measurement - Quantitative Information - Assets & Liabilities (Details) - Level 3 - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Credit derivative liabilities, net
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Internal floor (in bps)	0.00100
Valuation, Income Approach | Credit derivative liabilities, net
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value	$ (49)	$ (162)
Valuation, Income Approach | FG VIEs' assets
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value	$ (542)	(715)
Valuation, Income Approach | CLOs | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value		(4,090)
Valuation, Income Approach | Warehouse financing debt | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value		(36)
Valuation, Income Approach | Securitized borrowing | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value		$ (28)
Minimum | Credit derivative liabilities, net
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Hedge cost (as a percent)	0.172%
Bank profit (as a percent)	1.155%	5100.00%
Minimum | Valuation, Income Approach | Credit derivative liabilities, net
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Hedge cost (as a percent)		11.50%
Minimum | Valuation, Income Approach | FG VIEs' assets
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	5.50%	4.80%
Minimum | Valuation, Income Approach | CLO obligations of CFEs | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		3.00%
Minimum | Valuation, Income Approach | Warehouse financing debt | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		11.70%
Maximum | Credit derivative liabilities, net
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Hedge cost (as a percent)	0.392%
Bank profit (as a percent)	2.932%	27050.00%
Maximum | Valuation, Income Approach | Credit derivative liabilities, net
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Hedge cost (as a percent)		25.20%
Maximum | Valuation, Income Approach | FG VIEs' assets
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	11.50%	10.90%
Maximum | Valuation, Income Approach | CLO obligations of CFEs | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		27.40%
Maximum | Valuation, Income Approach | Warehouse financing debt | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		16.90%
Weighted Average | Credit derivative liabilities, net
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Hedge cost (as a percent)	0.241%
Bank profit (as a percent)	1.557%	10940.00%
Weighted Average | Valuation, Income Approach | Credit derivative liabilities, net
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Hedge cost (as a percent)		15.70%
Weighted Average | Valuation, Income Approach | FG VIEs' assets
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	6.50%	5.90%
Weighted Average | Valuation, Income Approach | CLO obligations of CFEs | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		5.50%
Weighted Average | Valuation, Income Approach | Warehouse financing debt | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		12.90%
CPR | Minimum | Valuation, Income Approach | FG VIEs' assets
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	0.10%	0.90%
CPR | Maximum | Valuation, Income Approach | FG VIEs' assets
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	21.20%	21.90%
CPR | Weighted Average | Valuation, Income Approach | FG VIEs' assets
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	8.00%	6.30%
CDR | Minimum | Valuation, Income Approach | FG VIEs' assets
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	1.30%	1.30%
CDR | Maximum | Valuation, Income Approach | FG VIEs' assets
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	41.00%	41.00%
CDR | Weighted Average | Valuation, Income Approach | FG VIEs' assets
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	9.30%	3.70%
Loss severity | Minimum | Valuation, Income Approach | FG VIEs' assets
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	45.00%	45.00%
Loss severity | Maximum | Valuation, Income Approach | FG VIEs' assets
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	100.00%	100.00%
Loss severity | Weighted Average | Valuation, Income Approach | FG VIEs' assets
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	82.60%	39.90%
Discount margin | Valuation, Income Approach | Securitized borrowing | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		20.90%
Terminal growth rate | Valuation, Income Approach | Securitized borrowing | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		3.00%
Measurement input, EBITDA | Minimum | Valuation, Market Approach | Securitized borrowing | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple-enterprise value/EBITDA		10
Measurement input, EBITDA | Maximum | Valuation, Market Approach | Securitized borrowing | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple-enterprise value/EBITDA		11
Measurement input, EBITDA | Weighted Average | Valuation, Market Approach | Securitized borrowing | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple-enterprise value/EBITDA		10.5
Exit multiple-EBITDA | Valuation, Income Approach | Securitized borrowing | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		1100.00%
Obligations of state and political subdivisions | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets carried at fair value	$ 2	$ 47
Obligations of state and political subdivisions | Minimum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	8.80%	7.40%
Obligations of state and political subdivisions | Maximum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	21.50%	13.50%
Obligations of state and political subdivisions | Weighted Average | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	9.10%	9.40%
RMBS | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets carried at fair value	$ 153	$ 179
RMBS | Minimum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	8.20%	7.50%
RMBS | Maximum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	11.90%	11.30%
RMBS | Weighted Average | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	9.70%	9.00%
RMBS | CPR | Minimum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	0.00%	3.80%
RMBS | CPR | Maximum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	15.00%	16.10%
RMBS | CPR | Weighted Average | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	3.90%	8.20%
RMBS | CDR | Minimum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	1.40%	1.50%
RMBS | CDR | Maximum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	16.00%	12.00%
RMBS | CDR | Weighted Average | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	5.70%	5.90%
RMBS | Loss severity | Minimum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	50.00%	50.00%
RMBS | Loss severity | Maximum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	125.00%	125.00%
RMBS | Loss severity | Weighted Average | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	82.60%	82.50%
Life insurance transactions | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets carried at fair value	$ 331	$ 342
Yield (as a percent)	8.10%	11.30%
CLOs | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets carried at fair value	$ 454	$ 428
CLOs | Discount margin | Minimum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	1.30%	1.80%
CLOs | Discount margin | Maximum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	7.80%	4.10%
CLOs | Discount margin | Weighted Average | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	2.70%	3.00%
Others | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets carried at fair value	$ 11	$ 24
Others | Minimum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	6.30%	7.40%
Others | Maximum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	12.30%	12.90%
Others | Weighted Average | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	12.10%	12.80%
FG VIEs' assets | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets carried at fair value	$ 180	$ 204
FG VIEs' assets | Minimum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	8.10%	6.60%
FG VIEs' assets | Maximum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	11.50%	10.90%
FG VIEs' assets | Weighted Average | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	10.10%	7.50%
FG VIEs' assets | CPR | Minimum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	0.10%	0.90%
FG VIEs' assets | CPR | Maximum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	21.20%	21.90%
FG VIEs' assets | CPR | Weighted Average | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	8.00%	12.90%
FG VIEs' assets | CDR | Minimum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	1.30%	1.30%
FG VIEs' assets | CDR | Maximum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	41.00%	41.00%
FG VIEs' assets | CDR | Weighted Average | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	9.30%	7.60%
FG VIEs' assets | Loss severity | Minimum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	45.00%	45.00%
FG VIEs' assets | Loss severity | Maximum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	100.00%	100.00%
FG VIEs' assets | Loss severity | Weighted Average | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	82.60%	81.00%
Structured products | Minimum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	7.50%
Structured products | Maximum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	28.10%
Structured products | Weighted Average | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	17.90%
Other assets | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets carried at fair value	$ 12	$ 47
Term (years)	10 years	10 years
Other assets | Minimum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	7.70%	7.70%
Other assets | Maximum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	8.20%	8.40%
Other assets | Weighted Average | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	7.90%	8.10%
Consolidated Investment Vehicles | Valuation, Income Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets carried at fair value	$ 75	$ 297
Yield (as a percent)		10.00%
Consolidated Investment Vehicles | Valuation, Income Approach | Corporate securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets carried at fair value		$ 96
Yield (as a percent)		16.30%
Consolidated Investment Vehicles | Valuation, Income Approach | Structured products
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets carried at fair value	$ 173	$ 46
Consolidated Investment Vehicles | Minimum | Valuation, Income Approach | Structured products
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		12.80%
Consolidated Investment Vehicles | Maximum | Valuation, Income Approach | Structured products
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		37.10%
Consolidated Investment Vehicles | Weighted Average | Valuation, Income Approach | Structured products
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		18.90%
Consolidated Investment Vehicles | Discount margin | Valuation, Income Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	20.90%
Consolidated Investment Vehicles | Discount margin | Minimum | Valuation, Income Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		19.80%
Consolidated Investment Vehicles | Discount margin | Minimum | Valuation, Income Approach | Corporate securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		20.80%
Consolidated Investment Vehicles | Discount margin | Maximum | Valuation, Income Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		25.10%
Consolidated Investment Vehicles | Discount margin | Maximum | Valuation, Income Approach | Corporate securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		23.80%
Consolidated Investment Vehicles | Discount margin | Weighted Average | Valuation, Income Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		22.70%
Consolidated Investment Vehicles | Discount margin | Weighted Average | Valuation, Income Approach | Corporate securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		21.70%
Consolidated Investment Vehicles | Terminal growth rate | Valuation, Income Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	4.00%
Consolidated Investment Vehicles | Terminal growth rate | Minimum | Valuation, Income Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		3.00%
Consolidated Investment Vehicles | Terminal growth rate | Maximum | Valuation, Income Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		4.00%
Consolidated Investment Vehicles | Terminal growth rate | Weighted Average | Valuation, Income Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		3.50%
Consolidated Investment Vehicles | Measurement input, revenue multiple | Valuation, Market Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple-price to book	110.00%	115.00%
Exit multiple-price to earnings	525.00%	450.00%
Consolidated Investment Vehicles | Measurement input, revenue multiple | Minimum | Valuation, Market Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple-enterprise value/revenue		1.05
Consolidated Investment Vehicles | Measurement input, revenue multiple | Maximum | Valuation, Market Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple-enterprise value/revenue		1.1
Consolidated Investment Vehicles | Measurement input, revenue multiple | Weighted Average | Valuation, Market Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple-enterprise value/revenue		1.08
Consolidated Investment Vehicles | Measurement input, EBITDA | Minimum | Valuation, Market Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple-enterprise value/EBITDA		2.5
Consolidated Investment Vehicles | Measurement input, EBITDA | Minimum | Valuation, Market Approach | Corporate securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple-enterprise value/EBITDA		2.5
Consolidated Investment Vehicles | Measurement input, EBITDA | Maximum | Valuation, Market Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple-enterprise value/EBITDA		11
Consolidated Investment Vehicles | Measurement input, EBITDA | Maximum | Valuation, Market Approach | Corporate securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple-enterprise value/EBITDA		2.75
Consolidated Investment Vehicles | Measurement input, EBITDA | Weighted Average | Valuation, Market Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple-enterprise value/EBITDA		10.25
Consolidated Investment Vehicles | Measurement input, EBITDA | Weighted Average | Valuation, Market Approach | Corporate securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple-enterprise value/EBITDA		2.63
Consolidated Investment Vehicles | Measurement input, cost to sell | Valuation, Income Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		100.00%
Consolidated Investment Vehicles | Measurement input, cost to sell | Valuation, Income Approach | Corporate securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		100.00%
Consolidated Investment Vehicles | Exit multiple-EBITDA | Valuation, Market Approach | Corporate securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		800.00%
Consolidated Investment Vehicles | Exit multiple-EBITDA | Minimum | Valuation, Market Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		800.00%
Consolidated Investment Vehicles | Exit multiple-EBITDA | Maximum | Valuation, Market Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		1200.00%
Consolidated Investment Vehicles | Exit multiple-EBITDA | Weighted Average | Valuation, Market Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)		1053.00%
Consolidated Investment Vehicles | Exit multiple-price to earnings | Valuation, Market Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	525.00%	550.00%
Consolidated Investment Vehicles | Exit multiple-price to book | Valuation, Market Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	110.00%	130.00%
Other invested assets | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets carried at fair value	$ 3	$ 5