XML 102 R91.htm IDEA: XBRL DOCUMENT v3.23.2

Fair Value Measurement - Quantitative Information - Assets & Liabilities (Details) - Level 3 - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 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	$ (57)	$ (162)
Valuation, Income Approach | FG VIEs' assets
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value	(699)	(715)
Valuation, Income Approach | CLOs | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value		(4,090)
Valuation, Income Approach | CLO obligations of CFEs | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value	(4,138)
Valuation, Income Approach | Securitized borrowing | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value	(31)	(28)
Valuation, Income Approach | Warehouse financing debt | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value	$ (30)	$ (36)
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)	1.159%	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)	4.50%	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)	4.80%	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)	0.00%	11.70%
Maximum | Credit derivative liabilities, net
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Hedge cost (as a percent)	0.395%
Bank profit (as a percent)	2.988%	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)	11.10%	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)	24.10%	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)	9.30%	16.90%
Weighted Average | Credit derivative liabilities, net
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Hedge cost (as a percent)	0.242%
Bank profit (as a percent)	1.78%	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)	5.50%	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)	7.00%	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)	9.30%	12.90%
CPR | Minimum | Valuation, Income Approach | FG VIEs' assets
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	0.40%	0.90%
CPR | Maximum | Valuation, Income Approach | FG VIEs' assets
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	22.10%	21.90%
CPR | Weighted Average | Valuation, Income Approach | FG VIEs' assets
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	8.30%	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	82.50%	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)	24.30%	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%	3.00%
Market multiple-enterprise value/EBITDA | Minimum | Valuation, Market Approach | Securitized borrowing | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple-enterprise value/EBITDA	10.50	10
Market multiple-enterprise value/EBITDA | Maximum | Valuation, Market Approach | Securitized borrowing | Consolidated Investment Vehicles
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple-enterprise value/EBITDA	11.50	11
Market multiple-enterprise value/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	11.00	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%	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	$ 46	$ 47
Obligations of state and political subdivisions | Minimum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	7.30%	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)	20.00%	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)	8.80%	9.40%
RMBS | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets carried at fair value	$ 162	$ 179
RMBS | Minimum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	7.50%	7.50%
RMBS | Maximum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	11.80%	11.30%
RMBS | Weighted Average | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	9.00%	9.00%
RMBS | CPR | Minimum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	1.00%	3.80%
RMBS | CPR | Maximum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	15.10%	16.10%
RMBS | CPR | Weighted Average | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	4.20%	8.20%
RMBS | CDR | Minimum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	1.50%	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	5.80%	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	$ 326	$ 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)	1.50%	1.80%
CLOs | Discount margin | Maximum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	3.90%	4.10%
CLOs | Discount margin | Weighted Average | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	2.60%	3.00%
Others | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets carried at fair value	$ 20	$ 24
Others | Minimum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	7.00%	7.40%
Others | Maximum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	12.80%	12.90%
Others | Weighted Average | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	12.70%	12.80%
FG VIEs' assets | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets carried at fair value	$ 188	$ 204
FG VIEs' assets | Minimum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	8.00%	6.60%
FG VIEs' assets | Maximum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	11.10%	10.90%
FG VIEs' assets | Weighted Average | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	9.50%	7.50%
FG VIEs' assets | CPR | Minimum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	0.40%	0.90%
FG VIEs' assets | CPR | Maximum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	22.10%	21.90%
FG VIEs' assets | CPR | Weighted Average | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conditional prepayment rate	8.30%	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	82.50%	81.00%
Other | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets carried at fair value	$ 32	$ 47
Term (years)	10 years	10 years
Other | Minimum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	8.10%	7.70%
Other | Maximum | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	8.70%	8.40%
Other | Weighted Average | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	8.40%	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	$ 290	$ 297
Yield (as a percent)	8.70%	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	$ 84	$ 96
Yield (as a percent)	16.30%	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		$ 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 | Corporate securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	17.10%
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)	17.10%	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)	27.40%	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)	23.60%	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 | Minimum | Valuation, Income Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	3.00%	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%	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)	3.40%	3.50%
Consolidated Investment Vehicles | Market multiple-enterprise value/revenue | Valuation, Market Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple-price to book	100.00%	115.00%
Exit multiple-price to earnings	525.00%	450.00%
Consolidated Investment Vehicles | Market multiple-enterprise value/revenue | Minimum | Valuation, Market Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple-enterprise value/revenue	0.95	1.05
Consolidated Investment Vehicles | Market multiple-enterprise value/revenue | Maximum | Valuation, Market Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple-enterprise value/revenue	0.99	1.1
Consolidated Investment Vehicles | Market multiple-enterprise value/revenue | Weighted Average | Valuation, Market Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple-enterprise value/revenue	0.97	1.08
Consolidated Investment Vehicles | Market multiple-enterprise value/EBITDA | Minimum | Valuation, Market Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple-enterprise value/EBITDA	2.50	2.5
Consolidated Investment Vehicles | Market multiple-enterprise value/EBITDA | Minimum | Valuation, Market Approach | Corporate securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple-enterprise value/EBITDA	2.50	2.5
Consolidated Investment Vehicles | Market multiple-enterprise value/EBITDA | Maximum | Valuation, Market Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple-enterprise value/EBITDA	11.50	11
Consolidated Investment Vehicles | Market multiple-enterprise value/EBITDA | Maximum | Valuation, Market Approach | Corporate securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple-enterprise value/EBITDA	2.75	2.75
Consolidated Investment Vehicles | Market multiple-enterprise value/EBITDA | Weighted Average | Valuation, Market Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple-enterprise value/EBITDA	10.66	10.25
Consolidated Investment Vehicles | Market multiple-enterprise value/EBITDA | Weighted Average | Valuation, Market Approach | Corporate securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market multiple-enterprise value/EBITDA	2.63	2.63
Consolidated Investment Vehicles | Cost | Valuation, Income Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	100.00%	100.00%
Consolidated Investment Vehicles | Cost | Valuation, Income Approach | Corporate securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	100.00%	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)	1100.00%	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%	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)	1129.00%	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%
Consolidated Investment Vehicles | Measurement Input, Discount Rate on Sale | Minimum | Valuation, Market Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	4.70%
Consolidated Investment Vehicles | Measurement Input, Discount Rate on Sale | Maximum | Valuation, Market Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	4.80%
Consolidated Investment Vehicles | Measurement Input, Discount Rate on Sale | Weighted Average | Valuation, Market Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	4.80%
Consolidated Investment Vehicles | Proceeds Held Back and Discounted | Minimum | Valuation, Market Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	30.00%
Consolidated Investment Vehicles | Proceeds Held Back and Discounted | Maximum | Valuation, Market Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	95.00%
Consolidated Investment Vehicles | Proceeds Held Back and Discounted | Weighted Average | Valuation, Market Approach | Equity securities and warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Yield (as a percent)	62.50%
Other invested assets | Valuation, Income Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total assets carried at fair value	$ 3	$ 5

X

- Definition

Represents the bank profit (in basis points), used as an input to measure fair value.

+ References

No definition available.

+ Details

Name:	ago_FairValueInputsBankProfit
Namespace Prefix:	ago_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the hedge cost (in basis points), used as an input to measure fair value.

+ References

No definition available.

+ Details

Name:	ago_FairValueInputsHedgeCost
Namespace Prefix:	ago_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Fair Value Inputs Internal Floor

+ References

No definition available.

+ Details

Name:	ago_FairValueInputsInternalFloor
Namespace Prefix:	ago_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Fair Value Inputs, Market Multiple, Enterprise Value, EBITDA

+ References

No definition available.

+ Details

Name:	ago_FairValueInputsMarketMultipleEnterpriseValueEBITDA
Namespace Prefix:	ago_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Fair Value Inputs, Market Multiple, Enterprise Value, Revenue

+ References

No definition available.

+ Details

Name:	ago_FairValueInputsMarketMultipleEnterpriseValueRevenue
Namespace Prefix:	ago_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the term used as an input to measure fair value.

+ References

No definition available.

+ Details

Name:	ago_FairValueInputsTerm
Namespace Prefix:	ago_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the yield used as an input to measure fair value.

+ References

No definition available.

+ Details

Name:	ago_FairValueInputsYield
Namespace Prefix:	ago_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Fair Value, Market Multiple, Price to Book

+ References

No definition available.

+ Details

Name:	ago_FairValueMarketMultiplePriceToBook
Namespace Prefix:	ago_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Fair Value, Market Multiple, Price to Earnings

+ References

No definition available.

+ Details

Name:	ago_FairValueMarketMultiplePriceToEarnings
Namespace Prefix:	ago_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

+ Details

Name:	us-gaap_AssetsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- 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
-Topic 860
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481326/860-20-50-3

+ Details

Name:	us-gaap_AssumptionForFairValueOnSecuritizationDateOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesPrepaymentSpeed
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Fair value of financial and nonfinancial obligations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

+ Details

Name:	us-gaap_LiabilitiesFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByLiabilityClassAxis=us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ValuationTechniqueAxis=us-gaap_IncomeApproachValuationTechniqueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByLiabilityClassAxis=ago_FinancialGuaranteeVariableInterestEntitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CollateralizedLoanObligationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByLiabilityClassAxis=ago_ConsolidatedInvestmentVehiclesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=ago_CollateralizedLoanObligationsAtFairValueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_BorrowingsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=ago_WarehouseFinancingDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_WeightedAverageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputPrepaymentRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputDefaultRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputLossSeverityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputDiscountRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputLongTermRevenueGrowthRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputEbitdaMultipleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ValuationTechniqueAxis=us-gaap_MarketApproachValuationTechniqueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MeasurementInputTypeAxis=ago_MeasurementInputExitMultipleEBITDAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByAssetClassAxis=us-gaap_USStatesAndPoliticalSubdivisionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByAssetClassAxis=us-gaap_ResidentialMortgageBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByAssetClassAxis=ago_LifeInsuranceTransactionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByAssetClassAxis=us-gaap_CollateralizedLoanObligationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByAssetClassAxis=ago_OtherAssetBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByAssetClassAxis=ago_FinancialGuaranteeVariableInterestEntitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByAssetClassAxis=us-gaap_OtherAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByAssetClassAxis=ago_ConsolidatedInvestmentVehiclesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=ago_EquitySecuritiesAndWarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=ago_StructuredProductsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputRevenueMultipleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputCostToSellMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MeasurementInputTypeAxis=ago_MeasurementInputPriceToEarningsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MeasurementInputTypeAxis=ago_MeasurementInputPriceToBookMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MeasurementInputTypeAxis=ago_MeasurementInputDiscountRateOnSaleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MeasurementInputTypeAxis=ago_ProceedsHeldBackAndDiscountedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByAssetClassAxis=ago_OtherInvestedAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: