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Financial Guarantee Insurance Contracts (Tables)
 12 Months Ended
Dec. 31, 2022
Insurance [Line Items]  
Effect of Reinsurance on Premiums Written and Earned
The effect of reinsurance on premiums written and earned was as follows:
Year Ended
December 31,		DirectAssumed
Ceded
Net
Premiums
2022:
Written$127 $— $104 $23 
Earned126 — 69 56 
2021:
Written$2 $— $35 $(33)
Earned62 — 15 47 
2020:
Written$(1)$— $(1)$— 
Earned65 1 12 54 
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]
The following table summarizes net premiums earned by location of risk:
Year Ended December 31,202220212020
United States41 $27 $32 
United Kingdom13 14 24 
Other international3 6 (2)
Total56 $47 $54 
Premium Receivables, including credit impairments
Premium receivables at December 31, 2022 and 2021 were $269 and $323, respectively.
Management evaluates premium receivables for expected credit losses ("credit impairment") in accordance with the CECL standard adopted January 1, 2020, which is further described in Note 2. Basis of Presentation and Significant Accounting Policies. The key indicator management uses to assess the credit quality of legacy financial guarantee premium receivables is Ambac's internal risk classifications for the insured obligation determined by the Risk Management Group.
Below is the amortized cost basis of financial guarantee premium receivables by risk classification code and asset class as of December 31, 2022 and 2021:
Surveillance Categories as of December 31, 2022
Type of Guaranteed BondIIAIIIIIIVTotal
Public Finance:
Housing revenue$140 $3 $5 $— $— $148 
Other2 — — — — 2 
Total Public Finance142 3 5 — — 150 
Structured Finance:
Mortgage-backed and home equity— — — — 11 11 
Student loan1 1 — 7 — 8 
Structured insurance— — — — — — 
Other4 — — — — 4 
Total Structured Finance5 1 — 7 11 24 
International:
Sovereign/sub-sovereign49 7 — 9 — 64 
Investor-owned and public utilities18 — — — — 18 
Other2 — — — — 2 
Total International70 7 — 9 — 85 
Total (1) (2)
$217 $10 $5 $16 $11 $259 
Surveillance Categories as of December 31, 2021
Type of Guaranteed BondIIAIIIIIIVTotal
Public Finance:
Housing revenue$149 $3 $5 $— $— $157 
Other2 — — — — 2 
Total Public Finance151 3 5 — — 159 
Structured Finance:
Mortgage-backed and home equity1 — 1 2 12 16 
Student loan1 1 — 9 — 12 
Structured insurance10 — — — — 10 
Other7 — — — — 7 
Total Structured Finance19 1 1 12 12 45 
International:
Sovereign/sub-sovereign74 8 — 11 — 93 
Investor-owned and public utilities28 — — — — 28 
Other5 — — — — 5 
Total International107 8 — 11 — 125 
Total (2)
$277 $12 $6 $22 $12 $329 
(1)    Excludes specialty property and casualty premium receivables of $16 and $2 at December 31, 2022 and 2021, respectively.
(2)    The underwriting origination dates for all policies included are greater than five years prior to the current reporting date.
Summarized Future Gross Undiscounted Premiums Expected to be Collected and Future Expected Premiums Earned, Net of Reinsurance
The following table summarizes the future gross undiscounted premiums to be collected and future premiums earned, net of reinsurance at December 31, 2022:
Future Premiums
to be
Collected (1)
Future
Premiums
to be
Earned Net of
Reinsurance (2)
Three months ended:
March 31, 2023$8 $5 
June 30, 20237 5 
September 30, 20237 5 
December 31, 20235 5 
Twelve months ended:
December 31, 202426 19 
December 31, 202525 18 
December 31, 202624 18 
December 31, 202723 17 
Five years ended:
December 31, 203295 70 
December 31, 203759 42 
December 31, 204227 17 
December 31, 204713 8 
December 31, 20524 2 
December 31, 2057— — 
Total$322 $231 
(1)Future premiums to be collected are undiscounted, gross of allowance for credit losses, and are used to derive the discounted premium receivable asset recorded on Ambac's balance sheet.
(2)Future premiums to be earned, net of reinsurance relate to the unearned premiums liability and deferred ceded premium asset recorded on Ambac’s balance sheet. The use of contractual lives for many bond types which do not have homogeneous pools of underlying collateral is required in the calculation of the premium receivable as further described in Note 2. Basis of Presentation and Significant Accounting Policies. This results in a different premium receivable balance than if expected lives were considered. If installment paying policies are retired or prepay early, premiums reflected in the premium receivable asset and amounts reported in the above table for such policies may not be collected. Future premiums to be earned also considers the use of contractual lives for many bond types which do not have homogeneous pools of underlying collateral, which may result in different unearned premium than if expected lives were considered. If those bonds types are retired early, premium earnings may be negative in the period of call or refinancing.
Schedule of Loss And Loss Expense Reserves And Subrogation Recoverable Table Below are the components of the loss and loss adjustment expense reserves and the subrogation recoverable asset at December 31, 2022 and 2021:
Legacy Financial Guarantee
Specialty Property and CasualtyPresent Value of Expected
Net Cash Flow
Balance Sheet Line ItemGross Loss and
Loss Expense
Reserves		Claims and
Loss Expenses		RecoveriesUnearned
Premium
Revenue		Gross Loss and
Loss Expense
Reserves
December 31, 2022:
Loss and loss adjustment expense reserves$90 $787 $(44)$(28)$805 
Subrogation recoverable— 5 (276)— (271)
Totals$90 $791 $(319)$(28)$534 
December 31, 2021:
Loss and loss adjustment expense reserves$32 $1,749 $(155)$(56)$1,570 
Subrogation recoverable— 88 (2,180)— (2,092)
Totals$32 $1,837 $(2,335)$(56)$(522)
Summary of Loss Reserve Roll-Forward, Net of Subrogation Recoverable and Reinsurance
Below is the loss and loss reserve expense roll-forward, net of subrogation recoverable and reinsurance, for the affected periods.
Year Ended December 31,202220212020
Beginning gross loss and loss adjustment expense reserves$(522)$(397)$(482)
Reinsurance recoverable
55 33 26 
Beginning balance of net loss and loss adjustment expense reserves(578)(430)(508)
Losses and loss expenses (benefit) incurred:
Current year
4 — 15 
Prior years(401)(89)210 
Total (1)(2)
(397)(88)225 
Loss and loss adjustment expenses (recovered) paid:
Current year
7 — 1 
Prior years(1,867)59 148 
Total
(1,860)59 149 
Foreign exchange effect
(2)— 2 
Ending net loss and loss adjustment expense reserves883 (578)(430)
Impact of VIE consolidation (3)
(464)— — 
Reinsurance recoverable (4)
115 55 33 
Ending gross loss and loss adjustment expense reserves534 (522)(397)
(1)Total losses and loss expenses (benefit) includes $(41), $5 and $(7) for the years ended December 31, 2022, 2021 and 2020, respectively, related to ceded reinsurance.
(2)Ambac records the impact of estimated recoveries related to securitized loans in RMBS transactions that breached certain representations and warranties ("R&W's") by transaction sponsors within losses and loss expenses (benefit) for the Legacy Financial Guarantee segment. The losses and loss expense (benefit) incurred associated with changes in estimated R&W's for the year ended December 31, 2022, 2021 and 2020 was $(123), $20 and $(23),
respectively. Refer to Note 1. Background and Business Description to the Consolidated Financial Statements in this Annual Report on Form 10-K for details of the RMBS litigation settlements reached in October and December 2022.
(3)In connection with the Puerto Rico restructuring, three new trusts were established for the year ended December 31, 2022. These trusts were consolidated by Ambac as further discussed in Note 12. Variable Interest Entities.
(4)Represents reinsurance recoverable on future loss and loss adjustment expenses. Additionally, the Balance Sheet line "Reinsurance recoverable on paid and unpaid losses" includes reinsurance recoverables (payables) of $0, $0 and $0 as of December 31, 2022, 2021 and 2020, respectively, related to previously presented loss and loss adjustment expenses and subrogation.
Summary of Information Related to Policies Currently Included in Ambac's Loss Reserves or Subrogation Recoverable
The tables below summarize information related to policies currently included in Ambac’s loss and loss adjustment expense reserves or subrogation recoverable at December 31, 2022 and 2021, excluding consolidated VIEs. Gross par exposures include capital appreciation bonds which are reported at the par amount at the time of issuance of the insurance policy as opposed to the current accreted value of the bond. The weighted average risk-free rate used to discount loss reserves at December 31, 2022 and 2021 was 3.9% and 1.2%, respectively.
Surveillance Categories as of December 31, 2022
IIAIIIIIIVVTotal
Number of policies37 6 9 12 93 5 162 
Remaining weighted-average contract period (in years) (1)719141412713
Gross insured contractual payments outstanding:
Principal$709 $200 $459 $1,000 $1,646 $34 $4,047 
Interest526 198 286 156 565 19 1,750 
Total$1,235 $399 $745 $1,156 $2,210 $53 $5,797 
Gross undiscounted claim liability$4 $4 $43 $446 $729 $53 $1,279 
Discount, gross claim liability(1)(1)(7)(162)(316)(9)(496)
Gross claim liability before all subrogation and before reinsurance$3 $3 $36 $284 $413 $43 $783 
Less:
Gross RMBS subrogation (2)$— $— $— $— $(140)$— $(140)
Discount, RMBS subrogation— — — — — — — 
Discounted RMBS subrogation, before reinsurance— — — — (140)— (140)
Less:
Gross other subrogation (3)(14)(4)— (31)(172)(12)(233)
Discount, other subrogation2 — — 5 42 4 54 
Discounted other subrogation, before reinsurance(12)(3)— (26)(130)(8)(179)
Gross claim liability, net of all subrogation and discounts, before reinsurance$(9)$— $36 $258 $143 $35 $464 
Less: Unearned premium revenue$(2)$(2)$(5)$(8)$(10)$(1)$(28)
Plus: Loss expense reserves1 1 — 2 4 — 8 
Gross loss and loss adjustment expense reserves
$(10)$(2)$32 $252 $137 $34 $444 
Reinsurance recoverable reported on
Balance Sheet (4)		$1 $— $8 $21 $3 $— $33 
(1)Remaining weighted-average contract period is weighted based on projected gross claims over the lives of the respective policies.
(2)RMBS subrogation represents Ambac’s estimate of subrogation recoveries from RMBS transaction sponsors for R&W breaches.
(3)Other subrogation represents subrogation related to excess spread and other contractual cash flows on public finance and structured finance transactions, including RMBS.
(4)Reinsurance recoverable reported on the Balance Sheet includes reinsurance recoverables of $33 related to future loss and loss adjustment expenses and $0 related to presented loss and loss adjustment expenses and subrogation.
Surveillance Categories as of December 31, 2021
IIAIIIIIIVVTotal
Number of policies34 15 7 14 130 5 205 
Remaining weighted-average contract period (in years) (1)912141513714
Gross insured contractual payments outstanding:
Principal$904 $840 $459 $1,300 $2,759 $40 $6,302 
Interest589 612 308 169 1,284 22 2,984 
Total$1,493 $1,452 $767 $1,469 $4,043 $62 $9,286 
Gross undiscounted claim liability$5 $16 $45 $544 $1,423 $62 $2,095 
Discount, gross claim liability— (1)(3)(109)(185)(4)(303)
Gross claim liability before all subrogation and before reinsurance$5 $15 $42 $435 $1,238 $57 $1,792 
Less:
Gross RMBS subrogation (2)$— $— $— $— $(1,737)$— $(1,737)
Discount, RMBS subrogation— — — — 7 — 7 
Discounted RMBS subrogation, before reinsurance— — — — (1,730)— (1,730)
Less:
Gross other subrogation (3)— (5)— (33)(583)(12)(633)
Discount, other subrogation— — — 2 24 2 28 
Discounted other subrogation, before reinsurance— (5)— (31)(559)(10)(605)
Gross claim liability, net of all subrogation and discounts, before reinsurance$5 $10 $42 $404 $(1,051)$47 $(543)
Less: Unearned premium revenue$(3)$(10)$(5)$(14)$(24)$(1)$(56)
Plus: Loss expense reserves1 — — 4 40 — 45 
Gross loss and loss adjustment expense reserves
$3 $1 $38 $394 $(1,036)$46 $(554)
Reinsurance recoverable reported on
Balance Sheet (4)		$1 $1 $10 $22 $(11)$— $23 
(1)Remaining weighted-average contract period is weighted based on projected gross claims over the lives of the respective policies.
(2)RMBS subrogation represents Ambac's estimate of subrogation recoveries from RMBS transaction sponsors for R&W breaches.
(3)Other subrogation represents subrogation related to excess spread and other contractual cash flows on public finance and structured finance transactions, including RMBS.
(4)    Reinsurance recoverable reported on the Balance Sheet includes reinsurance recoverables of $24 related to future loss and loss adjustment expenses and $0 related to presented loss and loss adjustment expenses and subrogation.
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense ntangible asset and accumulated amortization are included in the Consolidated Balance Sheets, as shown below.
December 31,20222021
Finite-lived Intangible Assets:
Insurance intangible:
Gross carrying value$1,247 $1,278 
Accumulated amortization981 958 
Net insurance intangible asset266 320 
Other intangibles:
Gross Carrying value52 36 
Accumulated amortization6 3 
Net other intangible assets47 33 
Total finite-lived intangible assets$312 $353 
Indefinite-lived Intangible Assets:
Insurance licenses$14 $9 
Total intangible assets$326 $362 
Premium Receivable, Allowance for Credit Loss
Below is a rollforward of the premium receivable allowance for credit losses as of December 31, 2022 and 2021:
Year Ended December 31,20222021
Beginning balance$9 $17 
Current period provision (benefit)(4)(6)
Write-offs of the allowance— (2)
Recoveries of previously written-off amounts— — 
Ending balance$5 $9 
Schedule of Financial Guarantee Insurance In Force By Bond Type
As of December 31, 2022 and 2021, the legacy financial guarantee portfolio consisted of the types of guaranteed bonds as shown in the following table:
Net Par Outstanding December 31, (1)
20222021
Public Finance:
Housing revenue (2)
$5,491 $5,610 
Lease and tax-backed revenue1,979 3,196 
General obligation1,301 1,612 
Other1,776 1,942 
Total Public Finance10,547 12,360 
Structured Finance:
Mortgage-backed and home equity1,930 2,724 
Investor-owned utilities1,103 1,556 
Other579 624 
Total Structured Finance3,612 4,904 
International Finance:
Sovereign/sub-sovereign4,077 5,141 
Investor-owned and public utilities2,583 3,283 
Asset-backed and other1,083 1,276 
Transportation711 1,056 
Total International Finance8,454 10,756 
Total$22,613 $28,020 
(1)Net Par Outstanding includes capital appreciation bonds, which are reported at the par amount at the time of issuance of the insurance policy as opposed to the current accreted value of the bond.
(2)Includes $5,400 and $5,490 of Military Housing net par at December 31, 2022 and 2021, respectively.
Premiums Receivable for Financial Guarantees
Below is the gross premium receivable roll-forward (direct contracts), net of the allowance for credit losses, for the affected periods:
Year Ended
December 31,		202220212020
Beginning premium receivable$320 $370 $416 
Adjustment to initially apply ASU 2016-13— — (3)
Premium receipts(36)(35)(46)
Adjustments for changes in expected and contractual cash flows for contracts (1)(31)(27)(6)
Accretion of premium receivable discount for contracts8 8 9 
Changes to allowance for credit losses4 8 (4)
Other adjustments (including foreign exchange) (2)(12)(4)5 
Ending premium
receivable (3)		$254 $320 $370 
(1)Adjustments for changes in expected and contractual cash flows are primarily due to higher discount rates and reductions in insured exposure as a result of early policy terminations and unscheduled principal paydowns .
(2)Includes foreign exchange gains/(losses) of ($13), ($2) and $4 for 2022, 2021,and 2020 respectively.
(3)Premium receivable includes premiums to be received in foreign denominated currencies most notably in British Pounds and Euros.
At December 31, 2022, 2021 and 2020 premium receivables include British Pounds of $71 (£59), $108 (£80) and $117 (£86), respectively, and Euros of $14 (€13), $16 (€14) and $19 (€16), respectively.
Reinsurance Recoverable, Credit Quality Indicator The following table sets forth our three most significant reinsurers by amount of reinsurance recoverable as of December 31, 2022.
Reinsurers
Type of Insurance
Rating
 (1)
Reinsurance
Recoverable
(2)
Unsecured
Recoverable
(3)
QBE Insurance CorporationSpecialty P&CA$41 $41 
Assured Guaranty Re Ltd.Financial
Guarantee		AA30 — 
General Reinsurance CompanySpecialty P&CA++25 11 
All other
reinsurers
18 7 
Total recoverables
$115 $60 
(1)Represents financial strength ratings from S&P for financial guarantee reinsurers and AM Best for specialty P&C reinsurers.
(2)Represents reinsurance recoverables on paid and unpaid losses. Unsecured amounts from QBE Insurance Corporation is also supported by an unlimited, uncapped indemnity from Enstar Holdings (US).
(3)Reinsurance recoverables reduced by ceded premiums payables due to reinsurers, letters of credit, and collateral posted for the benefit of Ambac.