XML 107 R93.htm IDEA: XBRL DOCUMENT
v3.23.3

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

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_WarehouseFinancingDebtMember
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: | srt_RangeAxis=srt_MinimumMember
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: | 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=ago_StructuredProductsMember
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_FairValueByAssetClassAxis=ago_OtherInvestedAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |