10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the Quarterly Period Ended March 31, 2023

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Commission File Number: 1-10777

AMBAC FINANCIAL GROUP, INC.

(Exact name of Registrant as specified in its charter)

Delaware			13-3621676
(State of incorporation)			(I.R.S. employer identification no.)
One World Trade Center	New York	NY	10007
(Address of principal executive offices)			(Zip code)

	(212)	658-7470
(Registrant's telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:
Title of each class	Trading Symbol	Name of each exchange on which registered
Common stock par value $0.01 per share	AMBC	New York Stock Exchange
Warrants	AMBC WS	New York Stock Exchange

Indicate by check mark whether the Registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ☒    No  ☐

Indicate by check mark whether the Registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the Registrant was required to submit such files).    Yes ☒    No  ☐

Indicate by check mark whether the Registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company or an emerging growth company. See definition of “large accelerated filer”, “accelerated filer”, “smaller reporting company” and "emerging growth company" in Rule 12b-2 of the Exchange Act): (Check one):

Large accelerated filer ☒ Accelerated filer ☐ Non-accelerated filer ☐ Smaller reporting company ☐ Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the Registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).  Yes  ☐    No  ☒

Indicate by check mark whether the registrant has filed all documents and reports required to be filed by Sections 12, 13 or 15(d) of the Securities Exchange Act of 1934 subsequent to the distribution of securities under a plan confirmed by a court.    Yes  ☒    No  ☐

As of May 5, 2023, 45,321,870 shares of common stock, par value $0.01 per share, of the Registrant were outstanding.

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES

TABLE OF CONTENTS

Cautionary Statement Pursuant to the Private Securities Litigation Reform Act of 1995					1
Item Number		Page	Item Number		Page
PART I. FINANCIAL INFORMATION			PART I (CONTINUED)
1	Unaudited Consolidated Financial Statements of Ambac Financial Group, Inc. and Subsidiaries			U.S. Insurance Statutory Basis Financial Results	47
	Consolidated Balance Sheets (Unaudited)	2		Ambac Assurance UK Limited Financial Results Under UK Accounting Principles	47
	Consolidated Statements of Total Comprehensive Income (Loss) (Unaudited)	3		Non-GAAP Financial Measures	48
	Consolidated Statements of Stockholders' Equity (Unaudited)	4	3	Quantitative and Qualitative Disclosures About Market Risk	49
	Consolidated Statements of Cash Flows (Unaudited)	5	4	Controls and Procedures	49
	Notes to Unaudited Consolidated Financial Statements	6
2	Management's Discussion and Analysis of Financial Condition and Results of Operations	31	PART II. OTHER INFORMATION
	Executive Summary	31	1	Legal Proceedings	50
	Critical Accounting Policies and Estimates	33	1A	Risk Factors	50
	Financial Guarantees in Force	33	2	Unregistered Sales of Equity Securities and Use of Proceeds	50
	Results of Operations	35	3	Defaults Upon Senior Securities	50
	Liquidity and Capital Resources	40	5	Other Information	51
	Balance Sheet	42	6	Exhibits	50
	Variable Interest Entities	47	SIGNATURES		51
	Accounting Standards	47

| Ambac Financial Group, Inc. i 2023 First Quarter FORM 10-Q |

CAUTIONARY STATEMENT PURSUANT TO THE PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995

Management has included in Parts I and II of this Quarterly Report on Form 10-Q, statements that may constitute “forward-looking statements” within the meaning of the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Words such as “estimate,” “project,” “plan,” “believe,” “anticipate,” “intend,” “planned,” “potential” and similar expressions, or future or conditional verbs such as “will,” “should,” “would,” “could,” and “may,” or the negative of those expressions or verbs, identify forward-looking statements. We caution readers that these statements are not guarantees of future performance. Forward-looking statements are not historical facts but instead represent only our beliefs regarding future events, which may by their nature be inherently uncertain and some of which may be outside our control. These statements may relate to plans and objectives with respect to the future, among other things which may change. We are alerting you to the possibility that our actual results may differ, possibly materially, from the expected objectives or anticipated results that may be suggested, expressed or implied by these forward-looking statements. Important factors that could cause our results to differ, possibly materially, from those indicated in the forward-looking statements include, among others, those discussed under “Risk Factors” in Part I, Item 1A of the 2022 Annual Report on Form 10-K and in Part II, Item 1A of this quarterly Report on Form 10-Q.

Any or all of management’s forward-looking statements here or in other publications may turn out to be incorrect and are based on management’s current belief or opinions. Ambac Financial Group’s (“AFG”) and its subsidiaries’ (collectively, “Ambac” or the “Company”) actual results may vary materially, and there are no guarantees about the performance of Ambac’s securities. Among events, risks, uncertainties or factors that could cause actual results to differ materially are: (1) the high degree of volatility in the price of AFG’s common stock; (2) uncertainty concerning the Company’s ability to achieve value for holders of its securities, whether from Ambac Assurance Corporation (“AAC”) and its subsidiaries or from the specialty property and casualty insurance business, the insurance distribution business, or related businesses; (3) inadequacy of reserves established for losses and loss expenses and the possibility that changes in loss reserves may result in further volatility of earnings or financial results; (4) potential for rehabilitation proceedings or other regulatory intervention or restrictions against AAC; (5) credit risk throughout Ambac’s business, including but not limited to credit risk related to insured residential mortgage-backed securities, student loan and other asset securitizations, public finance obligations (including risks associated with Chapter 9 and other restructuring proceedings), issuers of securities in our investment portfolios, and exposures to reinsurers; (6) our inability to effectively reduce insured financial guarantee exposures or achieve recoveries or investment objectives; (7) our inability to generate the significant amount of cash needed to service our debt and financial obligations, and our inability to refinance our indebtedness; (8) Ambac’s substantial indebtedness could adversely affect its financial condition and operating flexibility; (9) Ambac may not be able to obtain financing or raise capital on acceptable terms or at all due to its substantial indebtedness and

financial condition; (10) greater than expected underwriting losses in the Company’s specialty property and casualty insurance business; (11) failure of specialty insurance program partners to properly market, underwrite or administer policies; (12) inability to obtain reinsurance coverage on expected terms; (13) loss of key relationships for production of business in specialty property and casualty and insurance distribution businesses or the inability to secure such additional relationships to produce expected results; (14) the impact of catastrophic public health, environmental or natural events, or global or regional conflicts, on significant portions of our insured portfolio; (15) credit risks related to large single risks, risk concentrations and correlated risks; (16) risks associated with adverse selection as Ambac’s financial guarantee insurance portfolio runs off; (17) the risk that Ambac’s risk management policies and practices do not anticipate certain risks and/or the magnitude of potential for loss; (18) restrictive covenants in agreements and instruments that impair Ambac’s ability to pursue or achieve its business strategies; (19) adverse effects on operating results or the Company’s financial position resulting from measures taken to reduce financial guarantee risks in its insured portfolio; (20) disagreements or disputes with Ambac's insurance regulators; (21) loss of control rights in transactions for which we provide financial guarantee insurance; (22) inability to realize expected recoveries of financial guarantee losses; (23) risks attendant to the change in composition of securities in the Ambac’s investment portfolio; (24) adverse impacts from changes in prevailing interest rates; (25) events or circumstances that result in the impairment of our intangible assets and/or goodwill that was recorded in connection with Ambac’s acquisitions; (26) risks associated with the expected discontinuance of the London Inter-Bank Offered Rate; (27) factors that may negatively influence the amount of installment premiums paid to Ambac; (28) the risk of litigation and regulatory inquiries or investigations, and the risk of adverse outcomes in connection therewith; (29) the Company’s ability to adapt to the rapid pace of regulatory change; (30) actions of stakeholders whose interests are not aligned with broader interests of Ambac's stockholders; (31) system security risks, data protection breaches and cyber attacks; (32) regulatory oversight of Ambac Assurance UK Limited (“Ambac UK”) and applicable regulatory restrictions may adversely affect our ability to realize value from Ambac UK or the amount of value we ultimately realize; (33) failures in services or products provided by third parties; (34) political developments that disrupt the economies where the Company has insured exposures; (35) our inability to attract and retain qualified executives, senior managers and other employees, or the loss of such personnel; (36) fluctuations in foreign currency exchange rates; (37) failure to realize our business expansion plans or failure of such plans to create value; (38) greater competition for our specialty property and casualty insurance business and/or our insurance distribution business; (39) loss or lowering of the AM Best rating for our property and casualty insurance company subsidiaries; (40) disintermediation within the insurance industry or greater competition from technology-based insurance solutions; (41) changes in law or in the functioning of the healthcare market that impair the business model of our accident and health managing general underwriter; and (42) other risks and uncertainties that have not been identified at this time.

| Ambac Financial Group, Inc. 1 2023 First Quarter FORM 10-Q |

PART I.    FINANCIAL INFORMATION

Item 1.     Unaudited Financial Statements of Ambac Financial Group, Inc. and Subsidiaries

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES

Consolidated Balance Sheets

	March 31,		December 31,
(Dollars in millions, except share data) (March 31, 2023 (Unaudited))	2023		2022
Assets:
Investments:
Fixed maturity securities - available-for-sale, at fair value (amortized cost of $1,554 and $1,469)	$	1,494	$	1,395
Fixed maturity securities - trading, at fair value	29		59
Short-term investments, at fair value (amortized cost of $367 and $507)	367		507
Short-term investments pledged as collateral, at fair value (amortized cost of $61 and $64)	61		64
Other investments (includes $545 and $556 at fair value)	557		568
Total investments (net of allowance for credit losses of $1 and $0)	2,509		2,593
Cash and cash equivalents (including $10 and $14 of restricted cash)	48		44
Premium receivables (net of allowance for credit losses of $5 and $5)	272		269
Reinsurance recoverable on paid and unpaid losses (net of allowance for credit losses of $0 and $0)	130		115
Deferred ceded premium	135		124
Deferred acquisition costs	4		3
Subrogation recoverable	146		271
Derivative assets	31		27
Intangible assets	321		326
Goodwill	61		61
Other assets	85		84
Variable interest entity assets:
Fixed maturity securities, at fair value	2,119		1,967
Restricted cash	256		17
Loans, at fair value	1,856		1,829
Derivative and other assets	244		241
Total assets	$	8,219	$	7,973
Liabilities and Stockholders’ Equity:
Liabilities:
Unearned premiums	$	389	$	372
Loss and loss adjustment expense reserves	851		805
Ceded premiums payable	38		39
Deferred program fees and reinsurance commissions	6		5
Long-term debt	497		639
Accrued interest payable	438		427
Derivative liabilities	44		38
Other liabilities	141		163
Variable interest entity liabilities:
Long-term debt (includes $2,869 and $2,788 at fair value)	3,060		3,107
Derivative liabilities	1,174		1,048
Other liabilities	255		5
Total liabilities	6,892		6,647
Commitments and contingencies (See Note 14)
Redeemable noncontrolling interest	20		20
Stockholders’ equity:
Preferred stock, par value $0.01 per share;20,000,000 shares authorized shares; issued and outstanding shares—none	—		—
Common stock, par value $0.01 per share; 130,000,000 shares authorized; issued shares: 46,659,019 and 46,658,990	—		—
Additional paid-in capital	278		274
Accumulated other comprehensive income (loss)	(217)		(253)
Retained earnings	1,206		1,245
Treasury stock, shares at cost: 1,337,274 and 1,685,233	(14)		(15)
Total Ambac Financial Group, Inc. stockholders’ equity	1,254		1,252
Nonredeemable noncontrolling interest	53		53
Total stockholders’ equity	1,307		1,305
Total liabilities, redeemable noncontrolling interest and stockholders’ equity	$	8,219	$	7,973

See accompanying Notes to Unaudited Consolidated Financial Statements

| Ambac Financial Group, Inc. 2 2023 First Quarter FORM 10-Q |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES

Consolidated Statements of Total Comprehensive Income (Loss) (Unaudited)

	Three Months Ended March 31,
(Dollars in millions, except share data)	2023		2022
Revenues:
Net premiums earned	$	14	$	15
Commission income	14		9
Program fees	1		—
Net investment income	34		5
Net investment gains (losses), including impairments	(4)		10
Net gains (losses) on derivative contracts	(4)		57
Other income	3		2
Income (loss) on variable interest entities	(1)		22
Total revenues and other income	58		119
Expenses:
Losses and loss adjustment expenses	18		24
Amortization of deferred acquisition costs, net	1		—
Commission expense	8		5
General and administrative expenses	36		29
Intangible amortization	7		14
Interest expense	16		44
Total expenses	86		116
Pretax income (loss)	(29)		3
Provision for income taxes	4		—
Net income (loss)	(33)		2
Less: net (gain) loss attributable to noncontrolling interest	(1)		—
Net income (loss) attributable to common stockholders	$	(33)	$	2
Other comprehensive income (loss), after tax
Net income (loss)	$	(33)	$	2
Unrealized gains (losses) on securities, net of income tax provision (benefit) of $1 and $(2)	17		(105)
Gains (losses) on foreign currency translation, net of income tax provision (benefit) of $0 and $0	16		(23)
Credit risk changes of fair value option liabilities, net of income tax provision (benefit) of $0 and $0	—		—
Changes to postretirement benefit, net of income tax provision (benefit) of $0 and, $0	3		—
Total other comprehensive income (loss), net of income tax	36		(127)
Total comprehensive income (loss), net of income tax	3		(125)
Less: comprehensive (gain) loss attributable to the noncontrolling interest	(1)		—
Total comprehensive income (loss) attributable to common stockholders	$	3	$	(125)
Net income (loss) per share attributable to common stockholders:
Basic	$	(0.73)	$	0.04
Diluted	$	(0.73)	$	0.04
Weighted average number of common shares outstanding:
Basic	45,564,276		46,731,459
Diluted	45,564,276		47,359,731

See accompanying Notes to Unaudited Consolidated Financial Statements

| Ambac Financial Group, Inc. 3 2023 First Quarter FORM 10-Q |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES

Consolidated Statements of Stockholders’ Equity (Unaudited)

Three months ended March 31, 2023 and 2022
			Ambac Financial Group, Inc.
(Dollars in millions)	Total		Preferred Stock		Common Stock		Additional Paid-in Capital		Accumulated Other Comprehensive Income		Retained Earnings		Common Stock Held in Treasury, at Cost		Nonredeemable Noncontrolling Interest
Balance at December 31, 2022	$	1,305	$	—	$	—	$	274	$	(253)	$	1,245	$	(15)	$	53
Total comprehensive income (loss)	3		—		—		—		36		(33)		—		—
Stock-based compensation	3		—		—		3		—		—		—		—
Cost of shares (acquired) issued under equity plan	(5)		—		—		—		—		(6)		2		—
Balance at March 31, 2023	$	1,307	$	—	$	—	$	278	$	(217)	$	1,206	$	(14)	$	53
Balance at December 31, 2021	$	1,098	$	—	$	—	$	257	$	58	$	726	$	(3)	$	60
Total comprehensive income (loss)	(125)		—		—		—		(127)		2		—		—
Stock-based compensation	5		—		—		5		—		—		—		—
Cost of shares (acquired) issued under equity plan	(3)		—		—		—		—		(5)		1		—
Balance at March 31, 2022	$	974	$	—	$	—	$	262	$	(70)	$	723	$	(2)	$	60

See accompanying Notes to Unaudited Consolidated Financial Statements

| Ambac Financial Group, Inc. 4 2023 First Quarter FORM 10-Q |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES

Consolidated Statements of Cash Flows (Unaudited)

	Three Months Ended March 31,
(Dollars in millions)	2023		2022
Cash flows from operating activities:
Net income attributable to common stockholders	$	(33)	$	2
Redeemable noncontrolling interest	(1)		—
Net income	(33)		2
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation	—		—
Amortization of bond premium and discount	(3)		(3)
Share-based compensation	3		5
Unearned premiums, net	6		(11)
Losses and loss expenses, net	143		(6)
Ceded premiums payable	(1)		7
Premium receivables	(3)		6
Accrued interest payable	(37)		24
Amortization of intangible assets	7		14
Net investment gains (losses), including impairments	4		(10)
Variable interest entity activities	1		(22)
Derivative assets and liabilities	14		(46)
Other, net	(25)		48
Net cash provided by operating activities	77		9
Cash flows from investing activities:
Proceeds from sales of bonds	63		141
Proceeds from matured bonds	6		20
Purchases of bonds	(104)		(33)
Proceeds from sales of other invested assets	41		45
Purchases of other invested assets	(14)		(25)
Change in short-term investments	146		(114)
Change in cash collateral	(16)		54
Change in consolidated VIE cash collateral	254		—
Proceeds from paydowns of consolidated VIE assets	57		47
Other, net	8		—
Net cash provided by investing activities	441		136
Cash flows from financing activities:
Payments for redemption of Tier 2 Notes	(97)		—
Tax payments related to shares withheld for share-based compensation plans	(5)		(3)
Distributions to noncontrolling interest holders	—		—
Payments of consolidated VIE liabilities	(174)		(49)
Net cash used in financing activities	(276)		(52)
Effect of foreign exchange on cash, cash equivalents and restricted cash	—		—
Net cash flow	243		93
Cash, cash equivalents, and restricted cash at beginning of period	61		23
Cash, cash equivalents, and restricted cash at end of period	$	304	$	116

See accompanying Notes to Unaudited Consolidated Financial Statements

| Ambac Financial Group, Inc. 5 2023 First Quarter FORM 10-Q |

AMBAC FINANCIAL GROUP, INC. AND SUBSIDIARIES

NOTES TO UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS

Note 1. Background and Business Description	7	Note 8. Goodwill and Intangible Assets	25
Note 2. Basis of Presentation and Significant Accounting Policies	8	Note 9. Variable Interest Entities	25
Note 3. Segment Information	9	Note 10. Revenues From Contracts with Customers	27
Note 4. Investments	10	Note 11. Comprehensive Income	28
Note 5. Fair Value Measurements	14	Note 12. Net Income Per Share	29
Note 6. Insurance Contracts	19	Note 13. Income Taxes	29
Note 7. Derivative Instruments	24	Note 14. Commitments and Contingencies	30

| Ambac Financial Group, Inc. 6 2023 First Quarter FORM 10-Q |

Notes to Unaudited Consolidated Financial Statements

Ambac Financial Group, Inc. and Subsidiaries

(Dollar Amounts in Millions, Except Share Amounts)

1.    BACKGROUND AND BUSINESS DESCRIPTION

The following description provides an update of Note 1. Background and Business Description in the Notes to the Consolidated Financial Statements included in Part II, Item 8 in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022, and should be read in conjunction with the complete descriptions provided in the Form 10-K. Capitalized terms used, but not defined herein, and in the other footnotes to the Consolidated Financial Statements included in this Quarterly Report on Form 10-Q shall have the meanings ascribed thereto in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022.

Ambac Financial Group, Inc. (“AFG”), headquartered in New York City, is a financial services holding company incorporated in the state of Delaware on April 29, 1991. References to “Ambac,” the “Company,” “we,” “our,” and “us” are to AFG and its subsidiaries, as the context requires. Ambac's business operations include:

•Legacy Financial Guarantee Insurance — Ambac's financial guarantee business includes the activities of Ambac Assurance Corporation ("AAC") and its wholly owned subsidiaries, including Ambac Assurance UK Limited (“Ambac UK”) and Ambac Financial Services LLC ("AFS"). Both AAC and Ambac UK (the "Legacy Financial Guarantee Companies") have financial guarantee insurance portfolios that have been in runoff since 2008. AFS uses derivatives to hedge interest rate risk in AAC's insurance and investment portfolios.

•Specialty Property & Casualty Insurance — Ambac's Specialty Property & Casualty Insurance program business. Currently includes five admitted carriers and an excess and surplus lines (“E&S” or “nonadmitted”) insurer (collectively, “Everspan”). Everspan carriers have an AM Best rating of 'A-' (Excellent).

•Insurance Distribution — Ambac's specialty property and casualty ("P&C") insurance distribution business, which could include Managing General Agents and Underwriters (collectively "MGAs"), insurance brokers, and other distribution businesses; currently includes Xchange Benefits, LLC (“Xchange”) a P&C MGA specializing in accident and health products; All Trans Risk Solutions, LLC ("All Trans"), an MGA specializing in commercial automobile insurance for specific "for-hire" auto clauses; and Capacity Marine Corporation ("Capacity Marine"), a wholesale and retail brokerage and reinsurance intermediary specializing in marine and international risk.

The Company reports these three business operations as segments; see Note 3. Segment Information for further information.

Strategies to Enhance Shareholder Value

The Company's primary goal is to maximize long-term shareholder value through the execution of targeted strategies for its (i) Specialty Property and Casualty Insurance and Insurance Distribution businesses and (ii) Legacy Financial Guarantee Insurance business.

Specialty Property and Casualty Insurance and Insurance Distribution strategic priorities include:

•Growing a Specialty Property and Casualty Insurance business which generates underwriting profits and an attractive return on capital from a diversified portfolio of commercial and personal liability risks accessed through program administrators.

•Building an Insurance Distribution business based on deep domain knowledge in specialty and niche classes of risk which generate attractive margins at scale. This will be achieved through acquisitions, new business “de-novo” formation and incubation, and product expansion supported by a centralized technology led shared services offering.

•Making opportunistic investments that are strategic to both the Specialty Property and Casualty Insurance and Insurance Distribution businesses.

Legacy Financial Guarantee Insurance strategic priorities include:

•Actively managing, de-risking and mitigating insured portfolio risk, and pursuing recovery of previously paid losses.

•Improving operating efficiency and optimizing our asset and liability profile.

•Exploring strategic options to further maximize value for AFG.

The execution of Ambac’s strategy to increase the value of its investment in AAC is subject to the restrictions set forth in the Settlement Agreement, dated as of June 7, 2010, as amended (the "Settlement Agreement"), by and among AAC, Ambac Credit Products LLC ("ACP"), AFG and certain counterparties to credit default swaps with ACP that were guaranteed by AAC, as well as the Stipulation and Order among the Office of the Commissioner of Insurance for the State of Wisconsin (“OCI”), AFG and AAC that became effective on February 12, 2018, as amended (the “Stipulation and Order”), each of which requires OCI and, under certain circumstances, holders of surplus notes, to approve certain actions taken by or in respect of AAC. In exercising its approval rights, OCI will act for the benefit of policyholders, and will not take into account the interests of AFG.

The Settlement Agreement limits certain activities of AAC and its subsidiaries, such as issuing indebtedness; engaging in mergers and similar transactions; disposing of assets; making restricted payments; creating or permitting liens; engaging in transactions with affiliates; modifying or creating tax sharing agreements; and taking certain actions with respect to surplus notes (among other restrictions and limitations). The Settlement Agreement includes certain allowances with respect to these activities and generally requires the approval of OCI and, in some cases, holders of

| Ambac Financial Group, Inc. 7 2023 First Quarter FORM 10-Q |

Notes to Unaudited Consolidated Financial Statements

Ambac Financial Group, Inc. and Subsidiaries

(Dollar Amounts in Millions, Except Share Amounts)

surplus notes issued pursuant to the Settlement Agreement, for consents, waivers or amendments.

The Stipulation and Order includes affirmative covenants, as well as restrictions on certain business activities and transactions, of AFG and AAC. The Stipulation and Order has no fixed term and may be terminated or modified only with the approval of OCI. OCI reserved the right to modify or terminate the Stipulation and Order in a manner consistent with the interests of policyholders, creditors and the public generally.

The execution of Ambac’s strategy to increase the value of its investment in AAC may also be affected by a new capital framework being developed by OCI ("OCI's Runoff Capital Framework") to assist OCI with making decisions related to capital and liquidity management at AAC. OCI's Runoff Capital Framework is not yet complete and therefore we are not able to predict the results of such and what it may mean for our Legacy Financial Guarantee strategy, particularly as it relates to deleveraging AAC and distributing capital to AFG.

Opportunities for remediating losses on poorly performing insured transactions also depend on market conditions, including the perception of AAC’s creditworthiness, the structure of the underlying risk and associated policy as well as other counterparty specific factors. AAC's ability to commute policies or purchase certain investments may also be limited by available liquidity.

2.    BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES

The Company has disclosed its significant accounting policies in Note 2. Basis of Presentation and Significant Accounting Policies in the Notes to Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022. The following significant accounting policies provide an update to those included in the Company’s Annual Report on Form 10-K.

Consolidation:

The consolidated financial statements include the accounts of AFG and all other entities in which AFG (directly or through its subsidiaries) has a controlling financial interest, including variable interest entities (“VIEs”) for which AFG or an AFG subsidiary is deemed the primary beneficiary in accordance with the Consolidation Topic of the Accounting Standards Codification ("ASC"). All significant intercompany balances have been eliminated. See Note 9. Variable Interest Entities, for a detailed discussion of Ambac’s involvement in VIEs, Ambac’s methodology for determining whether Ambac is required to consolidate a VIE and the effects of VIEs being consolidated and deconsolidated.

Basis of Presentation:

The accompanying unaudited consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles ("GAAP") for interim financial reporting and with the instructions to Form 10-Q and Article 10 of

Regulation S-X. Accordingly, they do not include all of the information and disclosures required by GAAP for annual periods. These consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Annual Report on Form 10-K for the year ended December 31, 2022. The accompanying consolidated financial statements have not been audited by an independent registered public accounting firm in accordance with the standards of the Public Company Accounting Oversight Board (U.S.), but in the opinion of management such financial statements include all adjustments necessary for the fair presentation of the Company’s consolidated financial position and results of operations. The results of operations for the three months ended March 31, 2023, may not be indicative of the results that may be expected for the year ending December 31, 2023. The December 31, 2022, consolidated balance sheet was derived from audited financial statements.

The preparation of financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. As additional information becomes available or actual amounts become determinable, the recorded estimates are revised and reflected in operating results.

Foreign Currency:

The impact of non-functional currency transactions and the remeasurement of non-functional currency assets and liabilities into the respective subsidiaries' functional currency (collectively "foreign currency transactions gains/(losses)") are $(2) and $1 for the three months ended March 31, 2023 and 2022, respectively. Foreign currency transactions gains/(losses) are primarily the result of remeasuring Ambac UK's assets and liabilities denominated in currencies (primarily the U.S. dollar and the Euro) other than its functional currency (the British Pound Sterling).

Redeemable Noncontrolling Interest:

The All Trans, Capacity Marine and Xchange acquisitions, further described in the in the Notes to Consolidated Financial Statements included in Part II, Item 8 in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022, resulted in 85%, 80% and 80%, respectively, ownership of the acquired entities by Ambac. Under the terms of the acquisition agreements, Ambac has call options to purchase the remaining 15%, 20% and 20%, respectively, from the minority owners (i.e., noncontrolling interests) and the minority owners have put options to sell the remaining 15%, 20% and 20%, respectively, to Ambac. Because the exercise of the put options are outside the control of Ambac, in accordance with the Distinguishing Liabilities from Equity Topic of the ASC, Ambac reports redeemable noncontrolling interests in the mezzanine section of its consolidated balance sheet.

| Ambac Financial Group, Inc. 8 2023 First Quarter FORM 10-Q |

Notes to Unaudited Consolidated Financial Statements

Ambac Financial Group, Inc. and Subsidiaries

(Dollar Amounts in Millions, Except Share Amounts)

The redeemable noncontrolling interest is remeasured each period as the greater of:

i.the carrying value under ASC 810, which attributes a portion of consolidated net income (loss) to the redeemable noncontrolling interest, and

ii.the redemption value of the put option under ASC 480 as if it were exercisable at the end of the reporting period.

Any increase (decrease) in the carrying amount of the redeemable noncontrolling interest as a result of adjusting to the redemption value of the put option is recorded as an offset to retained earnings. The impact of such differences on earnings per share are presented in Note 12. Net Income Per Share.

Following is a rollforward of redeemable noncontrolling interest.

Three Months Ended March 31,	2023		2022
Beginning balance	$	20	$	18
Net income attributable to redeemable noncontrolling interest (ASC 810)	—		—
Adjustment to redemption value (ASC 480)	—		—
Ending balance	$	20	$	18

Supplemental Disclosure of Cash Flow Information	Three Months Ended March 31,
	2023		2022
Cash paid during the period for:
Income taxes	$	4	$	2
Interest on long-term debt	50		15
Non-cash investing and financing activities:
Exchange of investments in Puerto Rico bonds for new securities issued in the restructuring transactions	$	—	$	185
Securities acquired (transferred) in transactions related to Puerto Rico restructurings	(1)		—
	March 31,
	2023		2022
Reconciliation of cash, cash equivalents, and restricted cash reported within the Consolidated Balance Sheets to the Consolidated Statements of Cash Flows:
Cash and cash equivalents	$	38	$	60
Restricted cash	10		7
Variable Interest Entity restricted cash	256		49
Total cash, cash equivalents, and restricted cash shown on the Consolidated Statements of Cash Flows	$	304	$	116

Restricted cash is cash that we do not have the right to use for general purposes and includes fiduciary cash held by Ambac's insurance distribution subsidiaries and consolidated variable interest entity cash to support the obligations of the consolidated VIEs and cash received as collateral under their derivatives agreements.

Reclassifications and Rounding

Reclassifications may have been made to prior years' amounts to conform to the current year's presentation. Certain amounts and tables in the consolidated financial statements and associated notes may not add due to rounding.

Adopted Accounting Standards:

There have been no new accounting standards adopted during 2023.

Future Application of Accounting Standards:

There are no material future accounting standards currently being evaluated.

3.    SEGMENT INFORMATION

The Company reports its results of operations in three segments: Legacy Financial Guarantee Insurance, Specialty Property and Casualty Insurance and Insurance Distribution, separate from Corporate and Other, which is consistent with the manner in which the Company's chief operating decision maker ("CODM") reviews the business to assess performance and allocate resources. See Note 1. Background and Business Description for a description of each of the Company's business segments.

The following tables summarize the components of the Company’s total revenues and expenses, pretax income (loss) and total assets by reportable business segment. Information provided below for “Corporate and Other” primarily relates to the operations of AFG, which will include investment income on its investment portfolio and costs to maintain the operations of AFG, including public company reporting, capital management and business development costs for the acquisition and development of new business initiatives.

| Ambac Financial Group, Inc. 9 2023 First Quarter FORM 10-Q |

Notes to Unaudited Consolidated Financial Statements

Ambac Financial Group, Inc. and Subsidiaries

(Dollar Amounts in Millions, Except Share Amounts)

	Three Months Ended March 31, 2023										Three Months Ended March 31, 2022
	Legacy Financial Guarantee Insurance		Specialty Property & Casualty Insurance		Insurance Distribution		Corporate & Other		Consoli-dated (2)		Legacy Financial Guarantee Insurance		Specialty Property & Casualty Insurance		Insurance Distribution		Corporate & Other		Consoli-dated (2)
Revenues:
Net premiums earned	$	7	$	7					$	14	$	13	$	1					$	15
Commission income					$	14			14						$	9			9
Program fees			1						1				—						—
Net investment income	31		1				$	2	34		5		—				$	—	5
Net investment gains (losses), including impairments	(4)		—				—		(4)		10		—				—		10
Net gains (losses) on derivative contracts	(3)						—		(4)		57								57
Other (1)	2		—		—		—		2		24		—		—		—		24
Total revenues (2)	32		9		15		2		58		109		2		9		—		119
Expenses:
Losses and loss adjustment expenses	13		5						18		23		1						24
Amortization of deferred acquisition costs, net	—		1						1		—		—						—
Commission expenses					8				8						5				5
General and administrative expenses (3)	28		4		2		2		36		21		3		1		3		29
Depreciation expense (3)	—		—		—		—		—		—		—		—		—		—
Intangible amortization	6				1				7		14				1				14
Interest expense	16								16		44								44
Total expenses (2)	64		10		11		2		86		102		4		6		3		116
Pretax income (loss)	$	(32)	$	(1)	$	4	$	—	$	(29)	$	6	$	(2)	$	2	$	(3)	$	3
Total assets (2)	$	7,503	$	349	$	140	$	227	$	8,219	$	11,075	$	191	$	97	$	168	$	11,531

(1)Other revenues include the following line item on the Consolidated Statements of Total Comprehensive Income: Income (loss) on variable interest entities and other income.

(2)Inter-segment revenues and inter-segment pre-tax income (loss) amounts are insignificant and are not presented separately. Total assets noted in the Corporate and Other Column is net of AFG's investment in surplus notes issued by the Legacy Financial Guarantee Segment with fair values of $0 and $77 at March 31, 2023 and 2022.

(3)The Consolidated Statements of Comprehensive Income presents the sum of these items as General & Administrative Expenses.

4.    INVESTMENTS

Ambac’s non-VIE invested assets are primarily comprised of fixed maturity securities classified as either available-for-sale or trading securities, and interests in pooled investment funds, which are reported within Other investments on the Consolidated Balance Sheets. Interests in pooled investment funds in the form of common stock or in-substance common stock are classified as trading securities, while limited partner interests in such funds are

reported using the equity method. Fixed maturity securities classified as trading are unrated municipal bond obligations of Puerto Rico issuing entities that are part of the the PROMESA restructuring process as described further in Note 6. Insurance Contracts.

| Ambac Financial Group, Inc. 10 2023 First Quarter FORM 10-Q |

Notes to Unaudited Consolidated Financial Statements

Ambac Financial Group, Inc. and Subsidiaries

(Dollar Amounts in Millions, Except Share Amounts)

Fixed Maturity Securities:

The amortized cost and estimated fair value of available-for-sale investments, excluding VIE investments, at March 31, 2023 and December 31, 2022, were as follows:

	March 31, 2023:										December 31, 2022:
	Amortized Cost		Allowance for Credit Losses (2)		Gross Unrealized				Estimated Fair Value		Amortized Cost		Allowance for Credit Losses		Gross Unrealized				Estimated Fair Value
					Gains		Losses								Gains		Losses
Fixed maturity securities:
Municipal obligations	$	58	$	—	$	1	$	2	$	57	$	44	$	—	$	—	$	2	$	43
Corporate obligations	732		—		1		54		679		659		—		1		63		598
Foreign obligations	86		—		—		8		79		85		—		—		9		76
U.S. government obligations	66		—		—		3		63		68		—		—		4		65
Residential mortgage-backed securities	231		1		26		16		240		230		—		28		19		238
Commercial mortgage-backed securities	15		—		—		—		15		15		—		—		—		15
Collateralized debt obligations	140		—		—		3		137		141		—		—		4		137
Other asset-backed securities (1)	226		—		3		5		223		227		—		2		5		224
	1,554		1		31		90		1,494		1,469		—		31		106		1,395
Short-term	367		—		—		—		367		507		—		—		—		507
	1,922		1		31		90		1,862		1,977		—		31		106		1,902
Fixed maturity securities pledged as collateral:
Short-term	61		—		—		—		61		64		—		—		—		64
	61		—		—		—		61		64		—		—		—		64
Total available-for-sale investments	$	1,983	$	1	$	31	$	90	$	1,923	$	2,041	$	—	$	31	$	106	$	1,966

(1)Consists primarily of Ambac's holdings of military housing and student loan securities.

(2)For the three months ended March 31, 2023, the allowance for credit losses increased $1 on residential mortgage-backed securities on which credit losses were not previously recorded.

The amortized cost and estimated fair value of available-for-sale investments, excluding VIE investments, at March 31, 2023, by contractual maturity, were as follows:

	Amortized Cost		Estimated Fair Value
Due in one year or less	$	486	$	485
Due after one year through five years	536		508
Due after five years through ten years	297		268
Due after ten years	53		47
	1,371		1,307
Residential mortgage-backed securities	231		240
Commercial mortgage-backed securities	15		15
Collateralized debt obligations	140		137
Other asset-backed securities	226		223
Total	$	1,983	$	1,923

Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay certain obligations with or without call or prepayment penalties.

Unrealized Losses on Fixed Maturity Securities:

The following table shows gross unrealized losses and fair values of Ambac’s available-for-sale investments, excluding VIE investments, which at March 31, 2023 and December 31, 2022, did not have an allowance for credit losses under the CECL standard. This information is aggregated by investment category and length of time that the individual securities have been in a continuous unrealized loss position, at March 31, 2023 and December 31, 2022:

	March 31, 2023												December 31, 2022
	Less Than 12 Months				12 Months or More				Total				Less Than 12 Months				12 Months or More				Total
	Fair  Value		Gross Unrealized Loss		Fair  Value		Gross Unrealized Loss		Fair  Value		Gross Unrealized Loss		Fair  Value		Gross Unrealized Loss		Fair  Value		Gross Unrealized Loss		Fair  Value		Gross Unrealized Loss
Fixed maturity securities:
Municipal obligations	$	1	$	—	$	17	$	2	$	17	$	2	$	21	$	1	$	7	$	1	$	28	$	2
Corporate obligations	237		7		393		47		630		54		280		21		279		42		559		63
Foreign obligations	19		1		53		7		72		8		27		2		47		7		73		9
U.S. government obligations	19		1		38		2		57		3		40		3		19		1		58		4
Residential mortgage-backed securities	120		14		12		2		132		16		132		19		—		—		132		19
Commercial mortgage-backed securities	3		—		—		—		3		—		3		—		—		—		3		—
Collateralized debt obligations	10		—		115		3		125		3		90		3		36		1		126		4
Other asset-backed securities	105		4		6		1		111		5		198		4		5		1		203		5
	513		27		634		63		1,147		90		791		53		392		53		1,183		106
Short-term	12		—		2		—		14		—		78		—		8		—		86		—
Total temporarily impaired securities	$	525	$	27	$	636	$	63	$	1,161	$	90	$	869	$	53	$	400	$	53	$	1,269	$	106

| Ambac Financial Group, Inc. 11 2023 First Quarter FORM 10-Q |

Notes to Unaudited Consolidated Financial Statements

Ambac Financial Group, Inc. and Subsidiaries

(Dollar Amounts in Millions, Except Share Amounts)

Management has determined that the securities in the above table do not have credit impairment as of March 31, 2023 and December 31, 2022, based upon (i) no actual or expected principal and interest payment defaults on these securities; (ii) analysis of the creditworthiness of the issuer and financial guarantor, as applicable, and (iii) for debt securities that are non-highly rated beneficial interests in securitized financial assets, analysis of whether there was an adverse change in projected cash flows. Management's evaluation as of March 31, 2023, includes the expectation that all principal and interest payments on securities guaranteed by AAC or Ambac UK will be made timely and in full.

Ambac’s assessment about whether a security is credit impaired reflects management’s current judgment regarding facts and circumstances specific to the security and other factors. If that judgment changes, Ambac may record a charge for credit impairment in future periods.

The declines in fair value and resultant unrealized losses across asset classes as of March 31, 2023, included in the above table resulted from the impact of increasing interest rates and market spreads. Management has determined that the securities with unrealized losses are not credit impaired. Further discussion of management's assessment with respect to security categories with larger unrealized loss balances is below.

Corporate obligations

The gross unrealized losses on corporate obligations as of March 31, 2023, resulted from an increase in interest rates and, to a lesser extent, market spreads since the securities were purchased. Unrealized losses of $53 related to 738 investment grade securities with an average unrealized loss equal to 8% of amortized cost at March 31, 2023. Securities that have below investment grade credit ratings or are unrated comprise $1 of the gross unrealized loss and have an average unrealized loss equal to 6% of amortized cost at March 31, 2023. Management believes that the full and timely receipt of all principal and interest payment on corporate obligations with unrealized losses as of March 31, 2022, is probable.

Residential mortgage-backed securities and Other asset-backed securities

As of March 31, 2023, $16 of the unrealized loss on residential mortgage-backed securities related to 12 Ambac insured securities. Five of these account for $15 of the unrealized loss and have an average unrealized loss equal to 13% of amortized cost. The $5 unrealized loss on other asset backed securities related to 11 Ambac-insured securities that have an average unrealized loss equal to 4% of amortized cost. The majority of these unrealized losses for both residential mortgage-backed and other asset-backed securities relate to securities with long dated weighted average lives making their fair values more sensitive to interest rate changes. Also, most of these securities have below investment grade credit ratings or are unrated. The unrealized losses on these obligations resulted from adverse market conditions for long dated credit assets. As noted above, expected cash flows used in evaluating credit impairment of Ambac-insured securities contemplate full and timely payment of all

principal and interest payments. This assumption is included in the projection of model based cash flows used in evaluating credit impairments on beneficial interests in securitized financial assets, including the residential mortgage backed and student loan asset backed securities included in this group.

Investment Income (Loss)

Net investment income (loss) was comprised of the following for the affected periods:

Three Months Ended March 31,	2023		2022
Fixed maturity securities	$	17	$	15
Short-term investments	6		—
Investment expense	(2)		(1)
Securities available-for-sale and short-term	21		14
Fixed maturity securities - trading	—		(9)
Other investments	13		—
Total net investment income (loss)	$	34	$	5

Net investment income (loss) from Other investments primarily represents changes in fair value on equity securities, including certain pooled investment funds, and income from investment limited partnerships and other equity interests accounted for under the equity method.

Net Investments Gains (Losses), including Impairments:

The following table details amounts included in net investment gains (losses) and impairments included in earnings for the affected periods:

Three Months Ended March 31,	2023		2022
Gross realized gains on securities	$	—	$	23
Gross realized losses on securities	(2)		(15)
Foreign exchange gains (losses)	(2)		3
Credit impairments	(1)		(1)
Intent / requirement to sell impairments	—		—
Net investment gains (losses), including impairments	$	(4)	$	10

Ambac had an allowance for credit losses of $1 and $1 at March 31, 2023 and 2022, respectively.

Ambac did not purchase any financial assets with credit deterioration for the three months ended March 31, 2023 and 2022.

Counterparty Collateral, Deposits with Regulators and Other Restrictions:

Ambac routinely pledges and receives collateral related to certain transactions. Securities held directly in Ambac’s investment portfolio with a fair value of $61 and $64 at March 31, 2023 and December 31, 2022, respectively, were pledged to derivative counterparties. Ambac’s derivative counterparties have the right to re-pledge the investment securities and as such, these pledged securities are separately classified on the Consolidated Balance Sheets as “Fixed maturity securities pledged as collateral, at fair value” and "Short-term investments pledged as collateral, at fair value." Refer to Note 7. Derivative Instruments for further

| Ambac Financial Group, Inc. 12 2023 First Quarter FORM 10-Q |

Notes to Unaudited Consolidated Financial Statements

Ambac Financial Group, Inc. and Subsidiaries

(Dollar Amounts in Millions, Except Share Amounts)

information on cash collateral. There was no cash or securities received from other counterparties that were re-pledged by Ambac.

Securities carried at $23 and $23 at March 31, 2023 and December 31, 2022, respectively, were deposited by Ambac's insurance subsidiaries with governmental authorities or designated custodian banks as required by laws affecting insurance companies. Invested assets carried at $1 and $1 at March 31, 2023 and December 31, 2022, were deposited as security in connection with a letter of credit issued for an office lease.

Guaranteed Securities:

Ambac’s fixed maturity portfolio includes securities covered by guarantees issued by AAC and other financial guarantors

(“insured securities”). The published rating agency ratings on these securities reflect the higher of the financial strength rating of the financial guarantor or the rating of the underlying issuer. Rating agencies do not always publish separate underlying ratings (those ratings excluding the insurance by the financial guarantor). In the event these underlying ratings are not available from the rating agencies, Ambac will assign an internal rating. The following table represents the fair value and weighted-average underlying rating of insured securities in Ambac's investment portfolio at March 31, 2023 and December 31, 2022, respectively: 

	March 31, 2023:							December 31, 2022:
	Municipal Obligations		Mortgage and Asset- backed Securities		Total		Weighted Average Underlying Rating (1)	Municipal Obligations		Mortgage and Asset- backed Securities		Total		Weighted Average Underlying Rating (1)
Ambac Assurance Corporation	$	10	$	392	$	401	B-	$	10	$	394	$	403	B
Total	$	10	$	392	$	401	B-	$	10	$	394	$	403	B

(1)Ratings are based on the lower of Standard & Poor’s or Moody’s rating. If unavailable, Ambac’s internal rating is used.

Other Investments:

Ambac's investment portfolio includes interests in various pooled investment funds. Fair value and additional information about investments in pooled funds, by investment type, is summarized in the table below. Except as noted in the table, fair value as reported is determined using net asset value ("NAV") as a practical expedient. Redemption of certain funds valued using NAV may be subject to withdrawal limitations and/or redemption fees which vary with the timing and notification of withdrawal provided by the investor. In addition to these investments, Ambac has unfunded commitments of $57 to private credit and private equity funds at March 31, 2023.

	Fair Value
Class of Funds	March 31, 2023		December 31, 2022		Redemption Frequency	Redemption Notice Period
Hedge funds (1)	$	178	$	186	quarterly or semi-annually	90 days
Private credit (2)	87		84		quarterly if permitted	180 days if permitted
High yields and leveraged loans (3)	84		80		daily	0 - 30 days
Equity market investments (4) (10)	68		64		daily or quarterly	0 - 90 days
Investment grade floating rate income (5)	47		63		weekly	0 days
Private equity (6)	49		47		quarterly if permitted	90 days if permitted
Real estate properties (7)	22		22		quarterly	10 business days
Convertible bonds (8)(10)	9		8		daily	0 days
Insurance-linked investments (9)	1		1		see footnote (9)	see footnote (9)
Total equity investments in pooled funds	$	545	$	556

(1)This class seeks to generate superior risk-adjusted returns through selective asset sourcing, active trading and hedging strategies across a range of asset types.

(2)This class aims to obtain high long-term returns primarily through credit and preferred equity investments with low liquidity and defined term.

(3)This class of funds includes investments in a range of instruments including high-yield bonds, leveraged loans, CLOs, ABS and floating rate notes to generate income and capital appreciation.

(4)This class of funds aim to achieve long term growth through diversified exposure to global equity-markets.

(5)This class of funds includes investments in high quality floating rate debt securities including ABS and corporate floating rate notes.

(6)This class seeks to generate long-term capital appreciation through investments in private equity, equity-related and other instruments.

(7)Investments consist of UK property to generate income and capital growth.

(8)This class seeks to generate total returns from portfolios focused primarily on convertible securities.

(9)This class seeks to generate returns from insurance markets through investments in catastrophe bonds, life insurance and other insurance linked investments. This investment is restricted in connection with the unwind of certain insurance linked exposures. Ambac has redeemed its investment to the extent permitted by the fund.

(10)These categories include fair value amounts totaling $65 and $61 at March 31, 2023 and December 31, 2022, respectively, that are readily determinable and are priced through pricing vendors, including for Equity market investments $57 and $53 and Convertible bonds investments $9 and 8.

| Ambac Financial Group, Inc. 13 2023 First Quarter FORM 10-Q |

Notes to Unaudited Consolidated Financial Statements

Ambac Financial Group, Inc. and Subsidiaries

(Dollar Amounts in Millions, Except Share Amounts)

Other investments also include preferred equity investments with a carrying value of $12 and $12 as of March 31, 2023 and December 31, 2022, respectively, that do not have readily determinable fair values and are carried at cost, less any impairments as permitted under the Investments — Equity Securities Topic of the ASC. There were no impairments recorded on these investments or adjustments to fair value to reflect observable price changes in identical or similar investments from the same issuer during the periods presented.

The portion of net unrealized gains (losses) related to securities classified as trading and equity securities, excluding those

reported using the equity method, still held at the end of each period is as follows:

Three Months Ended March 31,	2023		2022
Net gains (losses) recognized during the period on trading and equity securities	$	7	$	(13)
Less: net gains (losses) recognized during the reporting period on trading and equity securities sold during the period	2		(3)
Unrealized gains (losses) recognized during the reporting period on trading and equity securities still held at the reporting date	$	5	$	(10)

5.    FAIR VALUE MEASUREMENTS

The Fair Value Measurement Topic of the ASC establishes a framework for measuring fair value and disclosures about fair value measurements.

Fair Value Hierarchy:

The Fair Value Measurement Topic of the ASC specifies a fair value hierarchy based on whether the inputs to valuation techniques used to measure fair value are observable or unobservable. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect Company-based assumptions. The fair value hierarchy has three broad levels as follows:

l	Level 1	Quoted prices for identical instruments in active markets. Assets and liabilities classified as Level 1 include US Treasury and other foreign government obligations traded in highly liquid and transparent markets, certain highly liquid pooled fund investments, exchange traded futures contracts and money market funds.
l	Level 2	Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations in which all significant inputs and significant value drivers are observable in active markets. Assets and liabilities classified as Level 2 generally include investments in fixed maturity securities representing municipal, asset-backed and corporate obligations, certain interest rate swap contracts and most long-term debt of variable interest entities consolidated under the Consolidation Topic of the ASC.
l	Level 3	Model derived valuations in which one or more significant inputs or significant value drivers are unobservable. This hierarchy requires the use of observable market data when available. Assets and liabilities classified as Level 3 include certain uncollateralized interest rate swap contracts and certain investments in fixed maturity securities. Additionally, Level 3 assets and liabilities generally include loan receivables, and certain long-term debt of variable interest entities consolidated under the Consolidation Topic of the ASC.

The Fair Value Measurement Topic of the ASC permits, as a practical expedient, the estimation of fair value of certain investments in funds using the net asset value per share of the investment or its equivalent (“NAV”). Investments in funds valued using NAV are not categorized as Level 1, 2 or 3 under the fair value hierarchy. The Investments — Equity Securities Topic of the ASC permits the measurement of certain equity securities without a readily determinable fair value at cost, less impairment, and adjusted to fair value when observable price changes in identical or similar investments from the same issuer occur (the "measurement alternative"). The fair values of investments measured under this measurement alternative are not included in the below disclosures of fair value of financial instruments. The following table sets forth the carrying amount and fair value of Ambac’s financial assets and liabilities as of March 31, 2023 and December 31, 2022, including the level within the fair value hierarchy at which fair value measurements are categorized. As required by the Fair Value Measurement Topic of the ASC, financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement.

| Ambac Financial Group, Inc. 14 2023 First Quarter FORM 10-Q |

Notes to Unaudited Consolidated Financial Statements

Ambac Financial Group, Inc. and Subsidiaries

(Dollar Amounts in Millions, Except Share Amounts)

	March 31, 2023										December 31, 2022
	Carrying Amount		Total Fair Value		Fair Value Measurements Categorized as:						Carrying Amount		Total Fair Value		Fair Value Measurements Categorized as:
					Level 1		Level 2		Level 3						Level 1		Level 2		Level 3
Financial assets:
Fixed maturity securities:
Municipal obligations	$	86	$	86	$	—	$	86	$	—	$	102	$	102	$	—	$	102	$	—
Corporate obligations	679		679		—		667		13		598		598		—		585		12
Foreign obligations	79		79		79		—		—		76		76		76		—		—
U.S. government obligations	63		63		63		—		—		65		65		65		—		—
Residential mortgage-backed securities	240		240		—		240		—		238		238		—		238		—
Commercial mortgage-backed securities	15		15		—		15		—		15		15		—		15		—
Collateralized debt obligations	137		137		—		137		—		137		137		—		137		—
Other asset-backed securities	223		223		—		155		69		224		224		—		157		67
Fixed maturity securities, pledged as collateral:
Short-term	61		61		61		—		—		64		64		64		—		—
Short term investments	367		367		359		8		—		507		507		506		1		—
Other investments (1)	557		545		65		—		—		568		556		61		—		—
Cash, cash equivalents and restricted cash	40		40		38		2		—		44		44		43		1		—
Derivative assets:
Interest rate swaps—asset position	30		30		—		1		30		27		27		—		1		26
Warrants	1		1		—		—		1		1		1		—		—		1
Other assets-Loans	2		2		—		—		2		10		10		—		—		10
Variable interest entity assets:
Fixed maturity securities: Corporate obligations, fair value option	2,003		2,003		—		—		2,003		1,828		1,828		—		—		1,828
Fixed maturity securities: Municipal obligation, trading	16		16		—		16		—		43		43		—		43		—
Fixed maturity securities: Municipal obligations, available-for-sale	100		100		—		100		—		96		96		—		96		—
Restricted cash	256		256		256		—		—		17		17		17		—		—
Loans	1,856		1,856		—		—		1,856		1,829		1,829		—		—		1,829
Derivative assets: Interest rate swaps—asset position	198		198		—		198		—		190		190		—		190		—
Derivative assets: Currency swaps—asset position	45		45		—		45		—		49		49		—		49		—
Total financial assets	$	7,056	$	7,045	$	922	$	1,669	$	3,974	$	6,726	$	6,715	$	833	$	1,615	$	3,772
Financial liabilities:
Long term debt, including accrued interest	$	935	$	779	$	—	$	764	$	15	$	1,065	$	878	$	—	$	864	$	14
Derivative liabilities:
Interest rate swaps—liability position	44		44		—		44		—		38		38		—		38		—
Liabilities for net financial guarantees written (2)	318		668		—		—		668		159		476		—		—		476
Variable interest entity liabilities:
Long-term debt	3,060		3,053		—		2,937		116		3,107		3,145		—		2,992		154
Derivative liabilities: Interest rate swaps—liability position	1,174		1,174		—		1,174		—		1,048		1,048		—		1,048		—
Total financial liabilities	$	5,531	$	5,717	$	—	$	4,918	$	799	$	5,418	$	5,586	$	—	$	4,942	$	644

(1)Excluded from the fair value measurement categories in the table above are investment funds of $480 and $494 as of March 31, 2023 and December 31, 2022, respectively, which are measured using NAV as a practical expedient. Also excluded from the fair value amounts in the table above are equity securities with a carrying value of $12 and $12 as of March 31, 2023 and December 31, 2022, respectively, that do not have readily determinable fair values and have carrying amounts determined using the measurement alternative.

(2)The carrying value of net financial guarantees written includes financial guarantee amounts in the following balance sheet items: Premium receivables; Reinsurance recoverable on paid and unpaid losses; Deferred ceded premium; Subrogation recoverable; Insurance intangible asset; Unearned premiums; Loss and loss expense reserves; Ceded premiums payable, premiums taxes payable and other deferred fees recorded in Other liabilities.

| Ambac Financial Group, Inc. 15 2023 First Quarter FORM 10-Q |

Notes to Unaudited Consolidated Financial Statements

Ambac Financial Group, Inc. and Subsidiaries

(Dollar Amounts in Millions, Except Share Amounts)

Determination of Fair Value:

When available, Ambac uses quoted active market prices specific to the financial instrument to determine fair value, and classifies such items within Level 1. The determination of fair value for financial instruments categorized in Level 2 or 3 involves judgment due to the complexity of factors contributing to the valuation. Third-party sources from which we obtain independent market quotes also use assumptions, judgments and estimates in determining financial instrument values and different third parties may use different methodologies or provide different values for financial instruments. In addition, the use of internal valuation models may require assumptions about hypothetical or inactive markets. As a result of these factors, the actual trade value of a financial instrument in the market, or exit value of a financial instrument position by Ambac, may be significantly different from its recorded fair value.

Ambac’s financial instruments carried at fair value are mainly comprised of investments in fixed maturity securities, equity interests in pooled investment funds, derivative instruments and certain variable interest entity assets and liabilities. Valuation of financial instruments is performed by Ambac’s finance group using methods approved by senior financial management with consultation from risk management and portfolio managers as appropriate. Preliminary valuation results are discussed with portfolio managers quarterly to assess consistency with market transactions and trends as applicable. Market transactions such as trades or negotiated settlements of similar positions, if any, are reviewed to validate fair value model results. However, financial instruments valued using significant unobservable inputs typically have very little or no observable market activity. Methods and significant inputs and assumptions used to determine fair values across portfolios are reviewed quarterly by senior financial management. Other valuation control procedures specific to particular portfolios are described further below.

Fixed Maturity Securities:

The fair values of fixed maturity investment securities are based primarily on market prices received from broker quotes or alternative pricing sources. Because many fixed maturity securities do not trade on a daily basis, pricing sources apply available market information through processes such as matrix pricing to calculate fair value. Such prices generally consider a variety of factors, including recent trades of the same and similar securities. In those cases, the items are classified within Level 2. For those fixed maturity investments where quotes were not available or cannot be reasonably corroborated, fair values are based on internal valuation models. Key inputs to the internal valuation models generally include maturity date, coupon and yield curves for asset-type and credit rating characteristics that closely match those characteristics of the specific investment securities being valued. Items valued using valuation models are classified according to the lowest level input or value driver that is significant to the valuation. Thus, an item may be classified in Level 3 even though there may be significant inputs that are readily observable. Longer (shorter) expected maturities or higher (lower) yields used in the valuation model will, in isolation, result in decreases (increases) in fair value. Generally, lower credit ratings or longer expected maturities will be accompanied by higher yields used to value a security. At

March 31, 2023, approximately 5%, 91% and 4% of the fixed maturity investment portfolio (excluding variable interest entity investments) was valued using broker quotes, alternative pricing sources and internal valuation models, respectively. At December 31, 2022, approximately 5%, 91% and 4% of the fixed maturity investment portfolio (excluding variable interest entity investments) was valued using broker quotes, alternative pricing sources and internal valuation models, respectively.

Ambac performs various review and validation procedures to quoted and modeled prices for fixed maturity securities, including price variance analyses, missing and static price reviews, overall valuation analysis by portfolio managers and finance managers and reviews associated with our ongoing impairment analysis. Unusual prices identified through these procedures will be evaluated further against alternative third party quotes (if available), internally modeled prices and/or other relevant data, and the pricing source values will be challenged as necessary. Price challenges generally result in the use of the pricing source’s quote as originally provided or as revised by the source following their internal diligence process. A price challenge may result in a determination by either the pricing source or Ambac management that the pricing source cannot provide a reasonable value for a security or cannot adequately support a quote, in which case Ambac would resort to using either other quotes or internal models. Results of price challenges are reviewed by portfolio managers and finance managers.

Information about the valuation inputs for fixed maturity securities classified as Level 3 is included below:

Other asset-backed securities: This security is a subordinated tranche of a securitization collateralized by Ambac-insured military housing bonds. The fair value classified as Level 3 was $69 and $67 at March 31, 2023 and December 31, 2022, respectively. Fair value was calculated using a discounted cash flow approach with expected future cash flows discounted using a yield consistent with the security type and rating. Significant inputs for the valuation at March 31, 2023 and December 31, 2022 include the following:

March 31, 2023:
a. Coupon rate:	5.98%
b. Average Life:	13.30 years
c. Yield:	12.00%
December 31, 2022:
a. Coupon rate:	5.98%
b. Average Life:	13.46 years
c. Yield:	12.60%

Corporate obligations: This includes certain investments in convertible debt securities. The fair value classified as Level 3 was $13 and $12 at March 31, 2023 and December 31, 2022, respectively. Fair value was calculated by discounting cash flows to average maturity of 1.5 years and yield of 11.6% at March 31, 2023 and average maturity of 1.75 years and yield of 11.3% at

| Ambac Financial Group, Inc. 16 2023 First Quarter FORM 10-Q |

Notes to Unaudited Consolidated Financial Statements

Ambac Financial Group, Inc. and Subsidiaries

(Dollar Amounts in Millions, Except Share Amounts)

December 31, 2022. Yields used are consistent with the security type and rating.

Other Investments:

Other investments primarily relate to investments in pooled investment funds. The fair value of pooled investment funds is determined using dealer quotes or alternative pricing sources when such investments have readily determinable fair values. When fair value is not readily determinable, pooled investment funds are valued using NAV as a practical expedient as permitted under the Fair Value Measurement Topic of the ASC. Refer to Note 4. Investments for additional information about such investments in pooled funds that are reported at fair value using NAV as a practical expedient.

Derivative Instruments:

Ambac’s derivative instruments primarily comprise interest rate swaps and exchange traded futures contracts. Fair value is determined based upon market quotes from independent sources, when available. When independent quotes are not available, fair value is determined using valuation models. These valuation models require market-driven inputs, including contractual terms, credit spreads, and yield curves. The valuation of certain derivative contracts may require the use of data inputs and assumptions that are determined by management and are not readily observable in the market. Under the Fair Value Measurement Topic of the ASC, Ambac is required to consider its own credit risk when measuring the fair value of derivative liabilities. Factors considered in estimating the amount of any Ambac credit valuation adjustment ("CVA") on such contracts include collateral posting provisions, right of set-off with the counterparty, the period of time remaining on the derivative and the pricing of recent terminations. The aggregate Ambac CVA impact was not significant to the fair value of derivatives at March 31, 2023 or December 31, 2022.

Interest rate swaps that are not centrally cleared are valued using vendor-developed models that incorporate interest rates and yield curves that are observable and regularly quoted. These models provide the net present value of the derivatives based on contractual terms and observable market data. Generally, the need for counterparty (or Ambac) CVAs on interest rate derivatives is mitigated by the existence of collateral posting agreements under which adequate collateral has been posted. Certain of these derivative contracts entered into with financial guarantee customers are not subject to collateral posting agreements. Counterparty credit risk related to such customer derivative assets is included in our determination of their fair value.

Ambac holds warrants to purchase preferred stock of a development stage company. These warrants have a fair value of $1 and $1 as of March 31, 2023 and December 31, 2022, respectively. Fair value was determined using a standard warrant valuation model with internally developed input assumptions.

Financial Guarantees:

Fair value of net financial guarantees written represents our estimate of the cost to Ambac to completely transfer its insurance obligation to another market participant of comparable credit worthiness. In theory, this amount should be the same amount

that another market participant of comparable credit worthiness would hypothetically charge in the marketplace, on a present value basis, to provide the same protection as of the balance sheet date. This fair value estimate of financial guarantees is presented on a net basis and includes direct and assumed contracts written, net of ceded reinsurance contracts.

Long-term Debt:

Long-term debt includes AAC surplus notes, the Tier 2 Notes issued in connection with the Rehabilitation Exit Transactions (fully redeemed during the first quarter of 2023) and the Ambac UK debt issued in connection with the Ballantyne commutation. The fair values of surplus notes and Tier 2 Notes are classified as Level 2. The fair value of Ambac UK debt is classified as Level 3.

Other Financial Assets and Liabilities:

Included in Other assets are loans, the fair values of which are estimated based upon internal valuation models and are classified as Level 3.

Variable Interest Entity Assets and Liabilities:

The financial assets and liabilities of Legacy Financial Guarantee Insurance VIEs ("FG VIEs") consolidated under the Consolidation Topic of the ASC consist primarily of fixed maturity securities and loans held by the VIEs, derivative instruments and notes issued by the VIEs which are reported as long-term debt. As described in Note 9. Variable Interest Entities, these FG VIEs are securitization entities which have liabilities and/or assets guaranteed by AAC or Ambac UK.

The fair values of FG VIE long-term debt are based on price quotes received from independent market sources when available. Such quotes are considered Level 2 and generally consider a variety of factors, including recent trades of the same and similar securities. For those instruments where quotes were not available or cannot be reasonably corroborated, fair values are based on internal valuation models. Comparable to the sensitivities of investments in fixed maturity securities described above, longer (shorter) expected maturities or higher (lower) yields used in the valuation model will, in isolation, result in decreases (increases) in fair value liability measurement for FG VIE long-term debt.

FG VIE derivative asset and liability fair values are determined using vendor-developed valuation models, which incorporated observable market data related to specific derivative contractual terms including interest rates, foreign exchange rates and yield curves.

The fair value of FG VIE fixed maturity securities and loan assets are generally based on Level 2 market price quotes received from independent market sources when available. When FG VIE asset fair values are not readily available from market quotes, values are estimated internally. Internal valuations of FG VIE’s fixed maturity securities or loan assets are derived from the fair values of the notes issued by the respective VIE and the VIE’s derivatives, determined as described above, adjusted for the fair values of Ambac’s financial guarantees associated with the VIE. The fair value of financial guarantees consist of: (i) estimated future premium cash flows discounted at a rate consistent with

| Ambac Financial Group, Inc. 17 2023 First Quarter FORM 10-Q |

Notes to Unaudited Consolidated Financial Statements

Ambac Financial Group, Inc. and Subsidiaries

(Dollar Amounts in Millions, Except Share Amounts)

that implicit in the fair value of the VIE’s liabilities and (ii) estimates of future claim payments discounted at a rate that includes Ambac’s own credit risk. Estimated future premium payments to be paid by the VIEs were discounted at a weighted average rate of 6.3% and 6.8% at March 31, 2023 and December

31, 2022, respectively. At March 31, 2023, the range of these discount rates was between 5.5% and 7.3%. At December 31, 2022, the range of these discount rates were between 5.8% and 8.5%.

Additional Fair Value Information for Financial Assets and Liabilities Accounted for at Fair Value:

The following tables present the changes in the Level 3 fair value category for the periods presented in 2023 and 2022. Ambac classifies financial instruments in Level 3 of the fair value hierarchy when there is reliance on at least one significant unobservable input to the valuation model. In addition to these unobservable inputs, the valuation models for Level 3 financial instruments typically also rely on a number of inputs that are readily observable either directly or indirectly. Thus, the gains and losses presented below include changes in the fair value related to both observable and unobservable inputs.

Level 3 - Financial Assets and Liabilities Accounted for at Fair Value
					VIE Assets
	Investments		Derivatives		Investments		Loans		Total
Three Months Ended March 31, 2023:
Balance, beginning of period	$	79	$	26	$	1,828	$	1,829	$	3,762
Total gains/(losses) realized and unrealized:
Included in earnings	—		5		133		59		196
Included in other comprehensive income	3		—		43		42		87
Settlements	—		—		—		(73)		(74)
Balance, end of period	$	81	$	31	$	2,003	$	1,856	$	3,972
The amount of total gains/(losses) included in earnings attributable to the change in unrealized gains or losses relating to assets and liabilities still held at the reporting date	$	—	$	5	$	133	$	59	$	196
The amount of total gains/(losses) included in other comprehensive income attributable to the change in unrealized gains or losses relating to assets and liabilities still held at the reporting date	$	3	$	—	$	43	$	42	$	87
Three Months Ended March 31, 2022:
Balance, beginning of period	$	91	$	70	$	3,320	$	2,718	$	6,199
Total gains/(losses) realized and unrealized:
Included in earnings	—		(17)		(93)		(96)		(204)
Included in other comprehensive income	(4)		—		(96)		(76)		(176)
Settlements	(1)		(2)		—		(78)		(80)
Balance, end of period	$	86	$	52	$	3,131	$	2,469	$	5,738
The amount of total gains/(losses) included in earnings attributable to the change in unrealized gains or losses relating to assets and liabilities still held at the reporting date	$	—	$	(17)	$	(93)	$	(96)	$	(204)
The amount of total gains/(losses) included in other comprehensive income attributable to the change in unrealized gains or losses relating to assets and liabilities still held at the reporting date	$	(4)	$	—	$	(96)	$	(76)	$	(176)

Invested assets and VIE long-term debt are transferred into Level 3 when internal valuation models that include significant unobservable inputs are used to estimate fair value. All such securities that have internally modeled fair values have been classified as Level 3. Derivative instruments are transferred into Level 3 when the use of unobservable inputs becomes significant to the overall valuation. There were no transfers of financial instruments into or out of Level 3 in the periods disclosed.

Gains and losses (realized and unrealized) relating to Level 3 assets and liabilities included in earnings for the affected periods are reported as follows:

	Three Months Ended March 31, 2023								Three Months Ended March 31, 2022
	Net Investment Income		Net Gains (Losses) on Derivative Contracts		Income (Loss)  on Variable Interest Entities		Other Income or  (Expense)		Net Investment Income		Net Gains (Losses) on Derivative Contracts		Income (Loss)  on Variable Interest Entities		Other Income or  (Expense)
Total gains (losses) included in earnings for the period	$	—	$	5	$	191	$	—	$	—	$	(17)	$	(188)	$	—
Changes in unrealized gains (losses) relating to financial instruments still held at the reporting date	—		5		191		—		—		(17)		(188)		—

| Ambac Financial Group, Inc. 18 2023 First Quarter FORM 10-Q |

Notes to Unaudited Consolidated Financial Statements

Ambac Financial Group, Inc. and Subsidiaries

(Dollar Amounts in Millions, Except Share Amounts)

6.    INSURANCE CONTRACTS

Amounts presented in this Note relate only to Ambac’s non-derivative insurance business for insurance policies issued to beneficiaries, excluding consolidated VIEs.

Premiums:

The effect of reinsurance on premiums written and earned was as follows:

	Three Months Ended March 31,
	2023				2022
	Written		Earned		Written		Earned
Direct	$	61	$	46	$	30	$	23
Assumed	—		—		—		—
Ceded	43		32		18		8
Net premiums	$	18	$	14	$	12	$	15

The following table summarizes net premiums earned by location of risk:

Three Months Ended March 31,	2023		2022
United States	$	11	$	9
United Kingdom	2		4
Other international	—		1
Total	$	14	$	15

Premium Receivables, including credit impairments:

Premium receivables at March 31, 2023 and December 31, 2022 were $272 and $269, respectively.

•Legacy financial guarantee premium receivables are discounted using an appropriate risk-free rate corresponding to the weighted average life of each policy and currency to

discount the future premiums contractually due or expected to be collected. The weighted average risk-free rate at March 31, 2023 and December 31, 2022, was 3.0% and 3.0%, respectively, and the weighted average period of future premiums used to estimate the premium receivable at March 31, 2023 and December 31, 2022, was 8.0 years and 8.0 years, respectively.

•Specialty property and casualty premium receivables are not discounted and are typically paid upfront. Any receivables for such amounts are generally collected in the following period. Non-payment of premium by the policyholder may lead to policy cancellation.

Management evaluates premium receivables for expected credit losses ("credit impairment") in accordance with the CECL standard, which is further described in Note 2. Basis of Presentation and Significant Accounting Policies in the Notes to Consolidated Financial Statements included in Ambac's Annual Report on Form 10-K for the year ended December 31, 2022.

•The Company records a premium receivable allowance for specialty property and casualty premiums that are 90 days past due.

•The key indicator management uses to assess the credit quality of the legacy financial guarantee premium receivables are Ambac's internal risk classifications for the insured obligations that are 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 March 31, 2023 and December 31, 2022:

	Surveillance Categories as of March 31, 2023												Surveillance Categories as of December 31, 2022
Type of Guaranteed Bond	I		IA		II		III		IV		Total		I		IA		II		III		IV		Total
Public Finance:
Housing revenue	$	138	$	3	$	5	$	—	$	—	$	146	$	140	$	3	$	5	$	—	$	—	$	148
Other	2		—		—		—		—		2		2		—		—		—		—		2
Total Public Finance	140		3		5		—		—		148		142		3		5		—		—		150
Structured Finance:
Mortgage-backed and home equity	—		—		—		—		11		12		—		—		—		—		11		11
Student loan	1		1		—		7		—		8		1		1		—		7		—		8
Other	3		—		—		—		—		3		4		—		—		—		—		4
Total Structured Finance	4		1		—		7		11		23		5		1		—		7		11		24
International:
Sovereign/sub-sovereign	53		7		—		9		—		69		49		7		—		9		—		64
Investor-owned and public utilities	18		—		—		—		—		18		18		—		—		—		—		18
Other	3		—		—		—		—		3		2		—		—		—		—		2
Total International	74		7		—		9		—		90		70		7		—		9		—		85
Total (1) (2)	$	218	$	10	$	5	$	16	$	11	$	261	$	217	$	10	$	5	$	16	$	11	$	259

(1)    Excludes specialty property and casualty premium receivables of $17 and $16 at March 31, 2023 and December 31, 2022, respectively.

(2)    The underwriting origination dates for all policies included are greater than five years prior to the current reporting date.

| Ambac Financial Group, Inc. 19 2023 First Quarter FORM 10-Q |

Notes to Unaudited Consolidated Financial Statements

Ambac Financial Group, Inc. and Subsidiaries

(Dollar Amounts in Millions, Except Share Amounts)

Below is a rollforward of the premium receivable allowance for credit losses as of March 31, 2023 and 2022:

Three Months Ended March 31,	2023		2022
Beginning balance	$	5	$	9
Current period provision (benefit)	—		(1)
Write-offs of the allowance	—		—
Recoveries of previously written-off amounts	—		—
Ending balance (1)	$	5	$	8

(1)At March 31, 2023 and 2022, $0 and $1 of premiums were past due.

Legacy Financial Guarantee Premium Receivables:

Below is the gross premium receivable roll-forward, net of the allowance for credit losses, for the affected periods:

Three Months Ended March 31,	2023		2022
Beginning premium receivable	$	254	$	320
Premium receipts	(9)		(15)
Adjustments for changes in expected and contractual cash flows for contracts (1)	7		3
Accretion of premium receivable discount for contracts	2		2
Changes to allowance for credit losses	—		1
Other adjustments (including foreign exchange) (2)	2		(3)
Ending premium receivable (3)	$	256	$	308

(1)Adjustments for changes in expected and contractual cash flows are primarily due to lower discount rates

(2)Includes foreign exchange gains (losses) of $2 and $(4) for 2023 and 2022, respectively.

(3)Premium receivable includes premiums to be received in foreign denominated currencies most notably in British Pounds and Euros. At March 31, 2023 and 2022, premium receivables include British Pounds of $75 (£61) and $101 (£77), respectively, and Euros of $15 (€13) and $16 (€15), respectively.

The following table summarizes the future gross undiscounted premiums to be collected and future premiums earned, net of reinsurance at March 31, 2023:

	Future Premiums to be Collected (1)		Future Premiums to be Earned Net of Reinsurance (2)
Three months ended:
June 30, 2023	$	7	$	5
September 30, 2023	7		5
December 31, 2023	5		5
Twelve months ended:
December 31, 2024	26		20
December 31, 2025	25		19
December 31, 2026	24		19
December 31, 2027	23		18
Five years ended:
December 31, 2032	98		73
December 31, 2037	62		44
December 31, 2042	29		17
December 31, 2047	14		8
December 31, 2052	4		2
December 31, 2057	—		—
Total	$	325	$	235

(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 in the Notes to Consolidated Financial Statements included in Ambac's Annual Report on Form 10-K for the year ended December 31, 2022. 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.

Loss and Loss Expense Reserves:

Ambac’s loss and loss expense reserves (“loss reserves”) are based on management’s on-going review of the insured portfolio. Below are the components of the loss and loss expense reserves and the subrogation recoverable asset at March 31, 2023 and December 31, 2022:

	March 31, 2023										December 31, 2022
	Specialty Property and Casualty		Legacy Financial Guarantee								Specialty Property and Casualty		Legacy Financial Guarantee
			Present Value of Expected Net Cash Flows										Present Value of Expected Net Cash Flows				:	:		:	:
Balance Sheet Line Item	Gross Loss and Loss Expense Reserves		Claims and Loss Expenses		Recoveries		Unearned Premium Revenue		Gross Loss and Loss Expense Reserves		Gross Loss and Loss Expense Reserves		Claims and Loss Expenses		Recoveries			Unearned Premium Revenue			Gross Loss and Loss Expense Reserves
March 31, 2023:
Loss and loss expense reserves	$	107	$	822	$	(48)	$	(30)	$	851	$	90	$	787	$	(44)		$	(28)		$	805
Subrogation recoverable	—		2		(148)		—		(146)		—		5		(276)			—			(271)
Totals	$	107	$	824	$	(196)	$	(30)	$	705	$	90	$	791	$	(319)		$	(28)		$	534

| Ambac Financial Group, Inc. 20 2023 First Quarter FORM 10-Q |

Notes to Unaudited Consolidated Financial Statements

Ambac Financial Group, Inc. and Subsidiaries

(Dollar Amounts in Millions, Except Share Amounts)

Below is the loss and loss reserve expense roll-forward, net of subrogation recoverable and reinsurance, for the affected periods:

Three Months Ended March 31,	2023		2022
Beginning gross loss and loss expense reserves	$	534	$	(522)
Reinsurance recoverable	115		56
Beginning balance of net loss and loss expense reserves	419		(578)
Losses and loss expenses (benefit):
Current year	2		1
Prior years	16		23
Total (1) (2)	18		24
Loss and loss expenses paid (recovered):
Current year	—		—
Prior years	(141)		(150)
Total	(141)		(150)
Foreign exchange effect	—		(1)
Ending net loss and loss expense reserves	578		(404)
Impact of VIE consolidation	—		(292)
Reinsurance recoverable (3)	127		49
Ending gross loss and loss expense reserves	$	705	$	(647)

(1)Total losses and loss expenses (benefit) includes $(20) and $(7) for the three months ended March 31, 2023 and 2022, respectively, related to ceded reinsurance.

(2)Ambac recorded 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 incurred associated with changes in estimated R&W's for the three months ended March 31, 2023 and 2022, was $0 and $224, respectively.

(3)Represents reinsurance recoverable on future loss and loss expenses. Additionally, the Balance Sheet line "Reinsurance recoverable on paid and unpaid losses" includes reinsurance recoverables (payables) of $3 and $0 as of March 31, 2023 and 2022, respectively, related to previously presented loss and loss expenses and subrogation.

For 2023, the adverse development in prior years was largely driven by the impact of lower discount rates on the RMBS portfolio, partially offset by assumption changes in the international portfolio.

For 2022, the adverse development in prior years was primarily attributable to the reduction in the R&W recoverable partially offset by the positive benefit of the March 2022 Puerto Rico restructuring.

Legacy Financial Guarantee Loss Reserves:

The tables below summarize information related to policies currently included in Ambac’s loss and loss expense reserves or subrogation recoverable at March 31, 2023 and December 31, 2022, 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 March 31, 2023 and December 31, 2022,was 3.5% and 3.9%, respectively.

Surveillance Categories as of March 31, 2023
	I		IA		II		III		IV		V		Total
Number of policies	32		7		10		12		102		5		168
Remaining weighted-average contract period (in years) (1)	8		15		12		14		12		6		12
Gross insured contractual payments outstanding:
Principal	$	570	$	514	$	1,056	$	414	$	1,597	$	34	$	4,185
Interest	487		338		297		149		583		19		1,872
Total	$	1,057	$	852	$	1,353	$	563	$	2,180	$	53	$	6,058
Gross undiscounted claim liability	$	3	$	7	$	59	$	402	$	749	$	53	$	1,272
Discount, gross claim liability	—		(1)		(8)		(137)		(299)		(9)		(455)
Gross claim liability before all subrogation and before reinsurance	3		6		50		265		449		44		818
Less:
Gross other subrogation (2)	(14)		(4)		—		(30)		(194)		(12)		(254)
Discount, other subrogation	2		1		—		5		48		3		59
Discounted other subrogation, before reinsurance	(11)		(4)		—		(26)		(146)		(8)		(196)
Gross claim liability, net of all subrogation and discounts, before reinsurance	(9)		2		50		240		303		36		622
Less: Unearned premium revenue	(1)		(5)		(12)		(1)		(10)		(1)		(30)
Plus: Loss expense reserves	1		1		1		1		2		—		6
Gross loss and loss expense reserves	$	(9)	$	(2)	$	40	$	240	$	295	$	35	$	598
Reinsurance recoverable reported on Balance Sheet (3)	$	1	$	—	$	9	$	21	$	3			$	34

(1)Remaining weighted-average contract period is weighted based on projected gross claims over the lives of the respective policies.

(2)Other subrogation represents subrogation related to excess spread and other contractual cash flows on public finance and structured finance transactions, including RMBS.

| Ambac Financial Group, Inc. 21 2023 First Quarter FORM 10-Q |

Notes to Unaudited Consolidated Financial Statements

Ambac Financial Group, Inc. and Subsidiaries

(Dollar Amounts in Millions, Except Share Amounts)

(3)Reinsurance recoverable reported on the Balance Sheet includes reinsurance recoverables of $34 related to future loss and loss expenses and $0 related to presented loss and loss expenses and subrogation.

Surveillance Categories as of December 31, 2022
	I		IA		II		III		IV		V		Total
Number of policies	37		6		9		12		93		5		162
Remaining weighted-average contract period (in years) (1)	7		19		14		14		12		7		14
Gross insured contractual payments outstanding:
Principal	$	709	$	200	$	459	$	1,000	$	1,646	$	34	$	4,047
Interest	526		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 subrogation	2		—		—		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 reserves	1		1		—		2		4		—		8
Gross loss and loss 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 expenses and $0 related to presented loss and loss expenses and subrogation.

Representation and Warranty Recoveries:

Ambac had recorded RMBS R&W subrogation recoveries of $0 ($0 net of reinsurance) and $140 ($140 net of reinsurance) at March 31, 2023 and December 31, 2022, respectively. On December 29, 2022, AAC entered into a Settlement Agreement and Release with Nomura Credit & Capital, Inc. ("Nomura") whereby the parties settled all RMBS litigation brought by AAC against Nomura and AAC received $140 on January 3, 2023, bringing to a close all of AAC's legacy litigation against RMBS sponsors.

Reinsurance Recoverables, Including Credit Impairments:

The Company uses ceded reinsurance to transfer certain insurance risk, along with premiums written and earned, to other insurance carriers that agree to share in such risks. The primary purpose of the reinsurance is to (i) protect the Company, at a cost, from losses in excess of amounts it is willing to accept, (ii) protect the Company's capital, and (iii) within the Specialty Property and Casualty Insurance operations, to manage the Company's net retention on individual risks and overall exposure to losses while

providing the Company the ability to offer policies with sufficient limits to meet policyholder needs.

•Within its Specialty Property and Casualty Insurance segment, the Company generally enters into quota share reinsurance agreements whereby the Company cedes to the capacity providers (reinsurers) a substantial amount (generally 70% or more) of its gross liability under all policies issued by and on behalf of the Company by the MGA/U.

Ambac is exposed to the credit risk of the reinsurer, or the risk that one of its reinsurers becomes insolvent or otherwise unable or unwilling to pay policyholder claims. This credit risk is generally mitigated by either selecting well capitalized, highly rated authorized capacity providers or requiring that the capacity provider post collateral to secure the reinsured risks, which in some instances, exceeds the related reinsurance recoverable.

Amounts recoverable from reinsurers are estimated in a manner consistent with the associated loss and loss adjustment expense reserves. The Company reports its reinsurance recoverables net of an allowance for amounts that are estimated to be uncollectible.

| Ambac Financial Group, Inc. 22 2023 First Quarter FORM 10-Q |

Notes to Unaudited Consolidated Financial Statements

Ambac Financial Group, Inc. and Subsidiaries

(Dollar Amounts in Millions, Except Share Amounts)

Ambac’s reinsurance assets, including deferred ceded premiums and reinsurance recoverables on losses amounted to $265 at March 31, 2023. Credit exposure existed at March 31, 2023, with respect to reinsurance recoverables to the extent that any reinsurer may not be able to reimburse Ambac under the terms of these reinsurance arrangements. At March 31, 2023, there were ceded reinsurance balances payable of $38 offsetting this credit exposure. Contractually ceded reinsurance payables can only be offset against amounts owed from the same reinsurer in the event that such reinsurer is unable to meet its obligations to reimburse Ambac.

To minimize its credit exposure to losses from reinsurer insolvencies, Ambac (i) is entitled to receive collateral from its reinsurance counterparties in certain reinsurance contracts and (ii) has certain cancellation rights that can be exercised by Ambac in the event of rating agency downgrades of a reinsurer (among other events and circumstances). Ambac held letters of credit and collateral amounting to $115 from its reinsurers at March 31, 2023. For those reinsurance counterparties that do not currently post collateral, Ambac's reinsurers are well capitalized, highly rated, authorized capacity providers. Additionally, while legacy liabilities from the PWIC and 21st Century Company acquisitions were fully ceded to certain reinsurers, Everspan also benefits from an unlimited, uncapped indemnity from Enstar Holdings (US) and 21st Century Premier Insurance Company, respectively, to mitigate any residual risk to these reinsurers.

The allowance for credit losses is based upon Ambac's ongoing review of amounts outstanding. Key indicators management uses to assess the credit quality of reinsurance recoverables are financial performance of the reinsurers, collateral posted by the reinsurers and independent rating agency credit ratings. The evaluation begins with a comparison of the fair value of collateral posted by the reinsurer to the recoverable, net of ceded premiums payable. Any shortfall of collateral posted is evaluated against our assessment of the reinsurer's financial strength, including its credit rating to determine whether an allowance is considered necessary.

At March 31, 2023, our top three reinsurers represented 82.6% of our total reinsurance recoverables on paid and unpaid losses. These reinsurance recoverables were primarily from reinsurers with applicable ratings of A or better. The following table sets forth our three most significant reinsurers by amount of reinsurance recoverable as of March 31, 2023.

Reinsurers	Type of Insurance	Rating  (1)	Reinsurance Recoverable (2)		Unsecured Recoverable (3)
QBE Insurance Corporation	Specialty P&C	A	$	40	$	40
Assured Guaranty Re Ltd.	Financial Guarantee	AA	30		—
General Reinsurance Company	Specialty P&C	A++	37		27
All other reinsurers			23		7
Total recoverables			$	130	$	75

(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.

Ambac has uncollateralized credit exposure of $75 and $60 and has recorded an allowance for credit losses of less than a million at March 31, 2023 and December 31, 2022. The uncollateralized credit exposure includes legacy liabilities obtained from the acquisitions of PWIC and the 21st Century Companies of $43 and $45 at March 31, 2023 and December 31, 2022, respectively. All legacy liabilities remain with affiliates of the sellers through reinsurance and contractual indemnities.

| Ambac Financial Group, Inc. 23 2023 First Quarter FORM 10-Q |

Notes to Unaudited Consolidated Financial Statements

Ambac Financial Group, Inc. and Subsidiaries

(Dollar Amounts in Millions, Except Share Amounts)

7.    DERIVATIVE INSTRUMENTS

The following tables summarize the gross fair values of individual derivative instruments and the impact of legal rights of offset as reported in the Consolidated Balance Sheets as of March 31, 2023 and December 31, 2022:

	March 31, 2023										December 31, 2022
	Gross Amounts of Recognized Assets / Liabilities		Gross Amounts Offset in the Consolidated Balance Sheet		Net Amounts of Assets/ Liabilities Presented in the Consolidated Balance Sheet		Gross Amount of Collateral Received / Pledged Not Offset in the Consolidated Balance  Sheet		Net Amount		Gross Amounts of Recognized Assets / Liabilities		Gross Amounts Offset in the Consolidated Balance Sheet		Net Amounts of Assets/ Liabilities Presented in the Consolidated Balance Sheet		Gross Amount of Collateral Received / Pledged Not Offset in the Consolidated Balance  Sheet		Net Amount
Derivative Assets:
Interest rate swaps	$	30	$	—	$	30	$	—	$	30	$	27	$	—	$	27	$	—	$	27
Warrants	1		—		1		—		1		1		—		1		—		1
Total non-VIE derivative assets	$	31	$	—	$	31	$	—	$	31	$	28	$	—	$	27	$	—	$	27
Derivative Liabilities:
Interest rate swaps	$	44	$	—	$	44	$	43	$	—	$	38	$	—	$	38	$	38	$	—
Total non-VIE derivative liabilities	$	44	$	—	$	44	$	43	$	—	$	38	$	—	$	38	$	38	$	—
Variable Interest Entities Derivative Assets:
Interest rate swaps	$	198	$	—	$	198	$	198	$	—	$	190	$	—	$	190	$	—	$	190
Currency swaps	45		—		45		45		—		49		—		49		—		49
Total VIE derivative assets	$	243	$	—	$	243	$	243	$	—	$	239	$	—	$	239	$	—	$	239
Variable Interest Entities Derivative Liabilities:
Interest rate swaps	$	1,174	$	—	$	1,174	$	—	$	1,174	$	1,048	$	—	$	1,048	$	—	$	1,048
Total VIE derivative liabilities	$	1,174	$	—	$	1,174	$	—	$	1,174	$	1,048	$	—	$	1,048	$	—	$	1,048

Amounts representing the right to reclaim cash collateral or the obligation to return cash collateral are not offset against fair value amounts recognized for derivative instruments on the Unaudited Consolidated Balance Sheets. The amounts representing the right to reclaim cash collateral and posted margin, recorded in “Other assets” were $9 and $6 as of March 31, 2023 and December 31, 2022, respectively. Amounts representing an obligation to return cash collateral were $254 and $0 as of March 31, 2023 and December 31, 2022, respectively and are reported in "Variable interest entity liabilities: Other liabilities".

The following tables summarize the location and amount of gains and losses of derivative contracts in the Unaudited Consolidated Statements of Total Comprehensive Income (Loss) for the three months ended March 31, 2023 and 2022:

	Location of Gain (Loss) Recognized in Consolidated Statements of Total Comprehensive Income (Loss)	Amount of Gain (Loss) Recognized in Consolidated Statement of Total Comprehensive Income (Loss)
		Three Months Ended March 31,
		2023		2022
Non-VIE derivatives:
Interest rate swaps	Net gains (losses) on derivative contracts	(3)		30
Warrants	Net gains (losses) on derivative contracts	—		—
Futures contracts	Net gains (losses) on derivative contracts	—		27
Total Non-VIE derivatives		$	(4)	$	57
Variable Interest Entities:
Currency swaps	Income (loss) on variable interest entities	$	(99)	$	6
Interest rate swaps	Income (loss) on variable interest entities	(3)		5
Total Variable Interest Entities		(102)		11
Total derivative contracts		$	(105)	$	68

Interest Rate Derivatives:

Ambac, through its subsidiary Ambac Financial Services (“AFS”), uses interest rate swaps, US Treasury futures contracts and other derivatives, to provide a partial economic hedge against the effects of rising interest rates elsewhere in the Legacy Financial Guarantee Insurance segment, including on Ambac’s financial guarantee exposures. Additionally, AFS provided interest rate swaps to states, municipalities and their authorities, asset-backed issuers and other entities in connection with their

financings. As of March 31, 2023 and December 31, 2022, the notional amounts of AFS’s derivatives are as follows:

	Notional
Type of Derivative	March 31, 2023		December 31, 2022
Interest rate swaps—pay-fixed/receive-variable	$	861	$	989
Interest rate swaps—receive-fixed/pay-variable	332		337

| Ambac Financial Group, Inc. 24 2023 First Quarter FORM 10-Q |

Notes to Unaudited Consolidated Financial Statements

Ambac Financial Group, Inc. and Subsidiaries

(Dollar Amounts in Millions, Except Share Amounts)

Other Derivatives:

As of March 31, 2023 Ambac holds warrants to purchase preferred stock of a development stage company.

Derivatives of Consolidated Variable Interest Entities

Certain VIEs consolidated under the Consolidation Topic of the ASC entered into derivative contracts to meet specified purposes within the securitization structure. The notional for VIE derivatives outstanding as of March 31, 2023 and December 31, 2022, were as follows:

	Notional
Type of VIE Derivative	March 31, 2023		December 31, 2022
Interest rate swaps—receive-fixed/pay-variable	$	1,609	$	1,573
Interest rate swaps—pay-fixed/receive-variable	890		887
Currency swaps	169		176

Contingent Features in Derivatives Related to Ambac Credit Risk

Ambac’s over-the-counter interest rate swaps are centrally cleared when eligible. Certain interest rate swaps remain with professional swap-dealer counterparties and direct customer counterparties. These non-cleared swaps are generally executed under standardized derivative documents including collateral support and master netting agreements. Under these agreements, Ambac is required to post collateral in the event net unrealized losses exceed predetermined threshold levels. Additionally, given that AAC is no longer rated by an independent rating agency, counterparties have the right to terminate the swap positions.

As of March 31, 2023 and December 31, 2022, the net liability fair value of derivative instruments with contingent features linked to Ambac’s own credit risk was $43 and $38, respectively, related to which Ambac had posted cash and securities as collateral with a fair value of $58 and $54, respectively. All such ratings-based contingent features have been triggered requiring maximum collateral levels to be posted by Ambac while preserving counterparties’ rights to terminate the contracts. Assuming all such contracts terminated at fair value on March 31, 2023, settlement of collateral balances and net derivative liabilities would result in a net receipt of cash and/or securities by Ambac. If counterparties elect to exercise their right to terminate, the actual termination payment amounts will be determined in accordance with derivative contract terms, which may result in amounts that differ from market values as reported in Ambac’s financial statements.

8.    GOODWILL AND INTANGIBLE ASSETS

See Note 2. Basis of Presentation and Significant Accounting Policies for discussion of goodwill. The following table presents the Company's goodwill.

	March 31, 2023		December 31, 2022
Beginning balance	$	61	$	46
Business acquisitions	—		15
Impairments	—		—
Ending balance	$	61	$	61

Intangible assets and accumulated amortization are included in the Consolidated Balance Sheets, as shown below.

	March 31, 2023		December 31, 2022
Finite-lived Intangible Assets:
Insurance intangible:
Gross carrying value	$	1,251	$	1,247
Accumulated amortization	990		981
Net insurance intangible asset	261		266
Other intangibles:
Gross carrying value	52		52
Accumulated amortization	7		6
Net other intangible assets	46		47
Total finite-lived intangible assets	307		312
Indefinite-lived Intangible Assets:
Insurance licenses	14		14
Total intangible assets	$	321	$	326

9.    VARIABLE INTEREST ENTITIES

Ambac, with its subsidiaries, has engaged in transactions with variable interest entities ("VIEs,") in various capacities.

•AAC and Ambac UK provide financial guarantees for various debt obligations issued by special purpose entities, including VIEs (FG VIEs);

•Ambac sponsors special purpose entities that issued notes to investors for various purposes; and

•AAC and Ambac UK invest in collateralized debt obligations, mortgage-backed and other asset-backed securities issued by VIEs and their ownership interest is generally insignificant to the VIE and/or they do not have rights that direct the activities that are most significant to such VIE.

FG VIEs:

AAC and Ambac UK provide financial guarantees in respect of assets held or debt obligations of VIEs. AAC and Ambac UK's primary variable interest exists through this financial guarantee insurance. The transaction structures provide certain financial protection to AAC or Ambac UK. Generally, upon deterioration in the performance of a transaction or upon an event of default as specified in the transaction legal documents, AAC or Ambac UK will obtain certain control rights that enable them to remediate losses. These rights may enable them to direct the activities of the entity that most significantly impact the entity’s economic performance. Under the 2018 Stipulation and Order, AAC is

| Ambac Financial Group, Inc. 25 2023 First Quarter FORM 10-Q |

Notes to Unaudited Consolidated Financial Statements

Ambac Financial Group, Inc. and Subsidiaries

(Dollar Amounts in Millions, Except Share Amounts)

required to obtain OCI approval with respect to the exercise of certain significant control rights in connection with policies that had previously been allocated to the Segregated Account. Accordingly, AAC does not have the right to direct the most significant activities of those FG VIEs.

FG VIEs which are consolidated may include recourse and non-recourse liabilities. FG VIEs' liabilities that are insured by the AAC or Ambac UK are with recourse, because AAC or Ambac UK guarantees the payment of principal and interest in the event the issuer defaults. FG VIEs' liabilities that are not insured by AAC or Ambac UK are without recourse, because AAC or Ambac UK has not issued a financial guarantee and is under no obligation for the payment of principal and interest of these

instruments. AAC or Ambac UK's economic exposure to consolidated FG VIEs is limited to the financial guarantees issued for recourse liabilities and any additional variable interests held by them. Additionally, AAC or Ambac UK’s general creditors, other than those specific policy holders which own the VIE debt obligations, do not have rights with regard to the assets of the VIEs. Ambac evaluates the net income effects and earnings per share effects to determine attributions between AAC or Ambac UK and non-controlling interests as a result of consolidating a VIE. Ambac has determined that the net income and earnings per share effect of consolidated FG VIEs are attributable to AAC or Ambac UK's interests through financial guarantee premium and loss payments with the VIE.

The following table summarizes the carrying values of assets and liabilities, along with other supplemental information related to FG VIEs that are consolidated as a result of financial guarantees of Ambac UK and AAC:

	March 31, 2023						December 31, 2022
	Ambac UK		Ambac Assurance		Total VIEs		Ambac UK		Ambac Assurance		Total VIEs
ASSETS:
Fixed maturity securities, at fair value:
Corporate obligations, fair value option	$	2,003	$	—	$	2,003	$	1,828	$	—	$	1,828
Municipal obligations, trading	—		16		16		—		43		43
Municipal obligations, available-for-sale (1)	—		100		100		—		96		96
Total FG VIE fixed maturity securities, at fair value	2,003		116		2,119		1,828		139		1,967
Restricted cash	255		1		256		1		16		17
Loans, at fair value (2)	1,856		—		1,856		1,829		—		1,829
Derivative assets	243		—		243		239		—		239
Other assets	—		1		1		—		2		2
Total FG VIE assets	$	4,358	$	118	$	4,476	$	3,896	$	157	$	4,054
LIABILITIES:
Long-term debt:
Long-term debt, at fair value (3)	$	2,869	$	—	$	2,869	$	2,788	$	—	$	2,788
Long-term debt, at par less unamortized discount	—		191		191		—		319		319
Total long-term debt	2,869		191		3,060		2,788		319		3,107
Derivative liabilities	1,174		—		1,174		1,048		—		1,048
Cash collateral payable	254		—		254		—		—		—
Other liabilities	—		1		1		—		5		5
Total FG VIE liabilities	$	4,297	$	192	$	4,489	$	3,836	$	324	$	4,160
Number of FG VIEs consolidated	4		4		8		5		4		9

(1)Available-for-sale FG VIE fixed maturity securities consist of municipal obligations with an amortized cost basis of $99 and $99 at March 31, 2023 and December 31, 2022, respectively. At March 31, 2023, there were $2 aggregate gross unrealized gains and $(1) aggregated gross unrealized losses. At December 31, 2022, there were $1 aggregate gross unrealized gains and $(4) aggregated gross unrealized losses. All such securities had contractual maturities due after ten years as of March 31, 2023.

(2)The unpaid principal balances of loan assets carried at fair value were $1,975 as of March 31, 2023 and $1,977 as of December 31, 2022.

(3)The unpaid principal balances of long-term debt carried at fair value were $3,088 as of March 31, 2023 and $3,064 as of December 31, 2022.

| Ambac Financial Group, Inc. 26 2023 First Quarter FORM 10-Q |

Notes to Unaudited Consolidated Financial Statements

Ambac Financial Group, Inc. and Subsidiaries

(Dollar Amounts in Millions, Except Share Amounts)

The following schedule details the components of Income (loss) on variable interest entities for the affected periods:

Three Months Ended March 31,	2023		2022
Net change in fair value of VIE assets and liabilities reported under the fair value option	$	3	$	(1)
Less: Credit risk changes of fair value option long-term debt reported through other comprehensive income (loss)	—		(1)
Net change in fair value of VIE assets and liabilities reported in earnings under the fair value option	3		(1)
Investment income (loss)	2		(4)
Net realized investment gains (losses) on available-for-sale securities	—		1
Interest expense on long-term debt carried at par less unamortized cost	(5)		(2)
Gain (loss) from consolidating VIEs	—		28
Income (loss) on variable interest entities	$	(1)	$	22

As further discussed in Note 6. Insurance Contracts, on March 17, 2022, in connection with the Puerto Rico restructuring, two new trusts were established. Ambac was required to consolidate these trusts which resulted in a combined gain of $28 for the three months ended March 31, 2022. Including these new trusts, Ambac consolidated zero and two FG VIEs for the three months ended March 31, 2023 and 2022, respectively. Ambac deconsolidated one FG VIE for the three months ended March 31, 2023 as a result of the retirement of all Ambac-insured bonds in the trust. There was no deconsolidation gain or loss for the three months ended March 31, 2023. Ambac did not deconsolidate any FG VIEs for the three months ended March 31, 2022.

The following table displays the carrying amount of the assets, liabilities and maximum exposure to loss of Ambac’s variable interests in non-consolidated VIEs resulting from financial guarantee and derivative contracts by major underlying asset classes, as of March 31, 2023 and December 31, 2022:

	March 31, 2023:								December 31, 2022:
	Carrying Value of Assets and Liabilities								Carrying Value of Assets and Liabilities
	Maximum Exposure To Loss (1)		Insurance Assets (2)		Insurance Liabilities (3)		Net Derivative Assets (Liabilities) (4)		Maximum Exposure To Loss (1)		Insurance Assets (2)		Insurance Liabilities (3)		Net Derivative Assets (Liabilities) (4)
Global structured finance:
Mortgage-backed—residential	$	2,531	$	141	$	437	$	—	$	2,559	$	266	$	400	$	—
Other consumer asset-backed	630		5		226		—		652		6		225		—
Other	424		2		2		—		430		2		2		1
Total global structured finance	3,585		148		665		—		3,642		274		628		1
Global public finance	17,907		221		216		—		17,997		216		212		—
Total	$	21,492	$	370	$	881	$	—	$	21,639	$	490	$	840	$	1

(1)Maximum exposure to loss represents the maximum future payments of principal and interest on insured obligations and derivative contracts. Ambac’s maximum exposure to loss does not include the benefit of any financial instruments (such as reinsurance or hedge contracts) that Ambac may utilize to mitigate the risks associated with these variable interests.

(2)Insurance assets represent the amount included in “Premium receivables” and “Subrogation recoverable” for financial guarantee insurance contracts on Ambac’s Consolidated Balance Sheets.

(3)Insurance liabilities represent the amount included in “Loss and loss expense reserves” and “Unearned premiums” for financial guarantee insurance contracts on Ambac’s Consolidated Balance Sheets.

(4)Net derivative assets (liabilities) represent the fair value recognized on interest rate swaps on Ambac’s Consolidated Balance Sheets.

10.    REVENUES FROM CONTRACTS WITH CUSTOMERS

The following table presents the Insurance Distribution business operations revenues recognized in accordance with the Revenue from Contracts with Customers Topic of the ASC disaggregated by policy type for the affected periods:

Three Months Ended March 31,	2023		2022
Employer Stop Loss	$	5	$	4
Affinity Products	5		5
Commercial auto	3		—
Other	1		—
Total	$	15	$	9

During the three months ended March 31, 2023 and 2022, the amount of revenue recognized related to performance obligations satisfied in a previous period, inclusive of changes due to estimates was approximately $3 and $4, respectively.

Contract Assets and Liabilities

The balances of contract assets and contract liabilities with customers were as follows:

	March 31, 2023		December 31, 2022
Premiums and commissions receivable	$	8	$	7
Contract assets	10		5
Contract liabilities	1		1

| Ambac Financial Group, Inc. 27 2023 First Quarter FORM 10-Q |

Notes to Unaudited Consolidated Financial Statements

Ambac Financial Group, Inc. and Subsidiaries

(Dollar Amounts in Millions, Except Share Amounts)

Contract assets represent estimated future consideration related to base commissions and profit-sharing commissions that were recognized as revenue upon the placement of the policy. The Company does not have the right to bill or collect payment on i) base commissions until the related premiums from policyholders has been collected nor ii) profit-sharing commissions until after the contract year is completed. Changes in contract assets during the three months ended March 31, 2023, is primarily due to the timing of new or renewal policies, growth in the business, reclassifications to receivables (unconditional right) and collections.

Contract liabilities represent advance consideration received from customers related to employer stop loss base commissions that will be recognized over time as claims servicing is performed, which typically occurs between 17 and 20 months from contract inception. During the three months ended March 31, 2023 and 2022, the Company recognized revenue that was included in the contract liability balance as of the beginning of the period of $0 and $1, respectively.

11.    COMPREHENSIVE INCOME

The following tables detail the changes in the balances of each component of accumulated other comprehensive income for the affected periods:

	Three Months Ended March 31, 2023:										Three Months Ended March 31, 2022:
	Unrealized Gains (Losses) on Available for Sale Securities (1)		Amortization of Postretirement Benefit (1)		Gain (Loss) on Foreign  Currency Translation (1)		Credit Risk Changes of Fair Value Option Liabilities  (1) (2)		Total		Unrealized Gains (Losses) on Available for Sale Securities (1)		Amortization of Postretirement Benefit (1)		Gain (Loss) on Foreign  Currency Translation (1)		Credit Risk Changes of Fair Value Option Liabilities  (1) (2)		Total
Beginning Balance	$	(71)	$	3	$	(184)	$	(1)	$	(253)	$	154	$	4	$	(100)	$	(1)	$	58
Other comprehensive income (loss) before reclassifications	14		3		16		—		33		(104)		—		(23)		—		(127)
Amounts reclassified from accumulated other comprehensive income (loss)	4		—		—		—		3		(1)		—		—		—		(1)
Net current period other comprehensive income (loss)	17		3		16		—		36		(105)		—		(23)		—		(127)
Ending Balance	$	(54)	$	6	$	(168)	$	(1)	$	(217)	$	49	$	4	$	(123)	$	(1)	$	(70)

(1)All amounts are net of tax and noncontrolling interest. Amounts in parentheses indicate reductions to Accumulated Other Comprehensive Income.

(2)Represents the changes in fair value attributable to instrument-specific credit risk of liabilities for which the fair value option is elected.

The following table details the significant amounts reclassified from each component of accumulated other comprehensive income, shown in the above rollforward tables, for the affected periods:

Details about Accumulated Other Comprehensive Income Components	Amount Reclassified from  Accumulated Other Comprehensive Income				Affected Line Item in the Consolidated Statement of Total Comprehensive Income (Loss)
	Three Months Ended March 31,
	2023		2022
Unrealized Gains (Losses) on Available-for-Sale Securities
	$	4	$	(1)	Net realized investment gains (losses)
	(1)		—		Provision for income taxes
	$	4	$	(1)	Net of tax and noncontrolling interest
Amortization of Postretirement Benefit
Prior service cost	$	—	$	—	Other income
Actuarial (losses)	—		—		Other income
	—		—		Total before tax
	—		—		Provision for income taxes
	$	—	$	—	Net of tax and noncontrolling interest
Credit Risk Changes of Fair Value Option Liabilities
	$	—	$	1	Credit risk changes of fair value option liabilities
	—		—		Provision for income taxes
	$	—	$	—	Net of tax and noncontrolling interest
Total reclassifications for the period	$	3	$	(1)	Net of tax and noncontrolling interest

| Ambac Financial Group, Inc. 28 2023 First Quarter FORM 10-Q |

Notes to Unaudited Consolidated Financial Statements

Ambac Financial Group, Inc. and Subsidiaries

(Dollar Amounts in Millions, Except Share Amounts)

12.    NET INCOME PER SHARE

As of March 31, 2023, 45,321,745 shares of AFG's common stock (par value $0.01) and warrants entitling holders to acquire up to 4,876,114 shares of new common stock at an exercise price of $16.67 per share were issued and outstanding. Common shares outstanding increased by 347,988 during the three months ended March 31, 2023, primarily due settlements of employee restricted and performance stock units. As of April 30, 2023, all of AFG's outstanding warrants expired without being exercised.

Earnings Per Share Calculation

The numerator of the basic and diluted earnings per share computation represents net income (loss) attributable to common stockholders adjusted by the retained earnings impact of the noncontrolling adjustment to redemption value under ASC 480. The redemption value adjustment is further described in the Redeemable Noncontrolling Interest section of Note 2. Basis of Presentation and Significant Accounting Policies.

The following table provides a reconciliation of net income attributable to common stockholders to the numerator in the basic and diluted earnings per share calculation, together with the resulting earnings per share amounts:

Three Months Ended March 31,	2023		2022
Net income (loss) attributable to common stockholders	$	(33)	$	2
Adjustment to redemption value (ASC 480)	—		—
Numerator of basic and diluted EPS	$	(33)	$	2
Per Share:
Basic	$	(0.73)	$	0.04
Diluted	$	(0.73)	$	0.04

The denominator of the basic earnings per share computation represents the weighted average common shares outstanding plus vested restricted stock units (together, "Basic Weighted Average Shares Outstanding"). The denominator of diluted earnings per share adjusts the Basic Weighted Average Shares Outstanding for all potential dilutive common shares outstanding during the period. All potential dilutive common shares outstanding consider common stock deliverable pursuant to warrants, unvested restricted stock units and performance stock units granted under existing compensation plans.

The following table provides a reconciliation of the weighted average shares denominator used for basic net income per share to the denominator used for diluted net income per share:

Three Months Ended March 31,	2023	2022
Basic weighted average shares outstanding denominator	45,564,276	46,731,459
Effect of potential dilutive shares :
Warrants	—	—
Restricted stock units	—	82,066
Performance stock units (1)	—	546,206
Diluted weighted average shares outstanding denominator	45,564,276	47,359,731
Anti-dilutive shares excluded from the above reconciliation:
Warrants	4,876,114	4,877,617
Restricted stock units	555,354	253,828
Performance stock units (1)	601,033	—

(1)    Performance stock units are reflected based on the performance metrics through the balance sheet date. Vesting of these units is contingent upon meeting certain performance metrics. Although a portion of these performance metrics have been achieved as of the respective period end, it is possible that awards may no longer meet the metric at the end of the performance period.    

13.    INCOME TAXES

AFG files a consolidated Federal income tax return with its subsidiaries. AFG and its subsidiaries also file separate or combined income tax returns in various states, local and foreign jurisdictions. The following are the major jurisdictions in which Ambac and its subsidiaries operate and the earliest tax years subject to examination:

Jurisdiction	Tax Year
United States	2010
New York State	2013
New York City	2018
United Kingdom	2019
Italy	2018

In accordance with the Income Tax Topic of the ASC, a valuation allowance is recognized if, based on the weight of available evidence, it is more-likely-than-not that some, or all, of the deferred tax asset will not be realized. As a result of the risks and uncertainties associated with future operating results, management believes it is more likely than not that the Company will not generate sufficient U.S. federal, state and/or local taxable income to recover its deferred tax operating assets and therefore maintains a full valuation allowance.

Consolidated Pretax Income (Loss)

U.S. and foreign components of pre-tax income (loss) were as follows:

Three Months Ended March 31,	2023		2022
U.S.	$	(48)	$	(1)
Foreign	19		4
Total	$	(29)	$	3

| Ambac Financial Group, Inc. 29 2023 First Quarter FORM 10-Q |

Notes to Unaudited Consolidated Financial Statements

Ambac Financial Group, Inc. and Subsidiaries

(Dollar Amounts in Millions, Except Share Amounts)

Provision (Benefit) for Income Taxes

The components of the provision for income taxes were as follows:

Three Months Ended March 31,	2023		2022
Current taxes
U. S. federal	$	—	$	—
U.S. state and local	—		—
Foreign	2		1
Total Current taxes	2		2
Deferred taxes
Foreign	2		(1)
Total Deferred taxes	2		(1)
Provision for income taxes	$	4	$	—

As of March 31, 2023, the Company has (i) $3,461 of NOLs, which if not utilized will begin expiring in 2030, and will fully expire in 2044, and (ii) $310 of interest expense tax deduction carryover, which has an indefinite carryforward period but is limited in any particular year based on certain provisions.

14.    COMMITMENTS AND CONTINGENCIES

The following commitments and contingencies provide an update of those discussed in Note 20: Commitments and Contingencies in the Notes to Consolidated Financial Statements included Part II, Item 8 in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022, and should be read in conjunction with the complete descriptions provided in the aforementioned Form 10-K.

Litigation Against Ambac

In re National Collegiate Student Loan Trusts Litigation (Delaware Court of Chancery, Consolidated C.A. No. 12111, filed November 1, 2019). The Vice Chancellor has entered a series of stays to facilitate good-faith settlement discussions, the most recent of which was entered on May 2, 2023 and stays the matter through May 5, 2023.

It is not reasonably possible to predict whether additional suits will be filed or whether additional inquiries or requests for information will be made, and it is also not possible to predict the outcome of litigation, inquiries or requests for information. It is possible that there could be unfavorable outcomes in these or other proceedings. Legal accruals for litigation against the Company which are probable and reasonably estimable, and management's estimated range of loss for such matters, are either not applicable or are not material to the operating results or financial position of the Company. For the litigation matters the Company is defending that do not meet the “probable and reasonably estimable” accrual threshold and where no loss estimates have been provided above, management is unable to make a meaningful estimate of the amount or range of loss that could result from unfavorable outcomes. Under some circumstances, adverse results in any such proceedings could be material to our business, operations, financial position, profitability or cash flows. The Company believes that it has substantial defenses to the claims above and, to the extent that these actions proceed, the Company intends to defend itself

vigorously; however, the Company is not able to predict the outcomes of these actions.

Litigation Filed or Joined by Ambac

In the ordinary course of their businesses, certain of Ambac’s subsidiaries assert claims in legal proceedings against third parties to recover losses already paid and/or mitigate future losses. The amounts recovered and/or losses avoided which may result from these proceedings is uncertain, although recoveries and/or losses avoided in any one or more of these proceedings during any quarter or fiscal year could be material to Ambac’s results of operations in that quarter or fiscal year.

Puerto Rico

In re Financial Oversight and Management Board for Puerto Rico (United States District Court, District of Puerto Rico, No. 1:17- bk-03283) (appeals of the Commonwealth Plan). On January 18, 2022, the District Court entered an order confirming the Commonwealth Plan and entered its findings of fact and conclusions of law related thereto. Several parties filed notices of appeal of the District Court’s confirmation order to the First Circuit Court of Appeals, including a number of teachers’ unions (“the Teachers’ Unions”), the Oversight Board, certain individual creditors, a number of credit unions (“the Credit Unions”), and Suiza Dairy Corporation (“Suiza”). Oversight Board: On July 18, 2022, the First Circuit rejected the Oversight Board’s challenges to, and affirmed, the confirmation order. The Oversight Board filed a petition for a writ of certiorari seeking Supreme Court review of the First Circuit’s decision in its appeal of the confirmation order on October 17, 2022; the Supreme Court denied the Oversight Board’s petition on February 21, 2023.

In re Financial Oversight and Management Board for Puerto Rico (United States District Court, District of Puerto Rico, No. 1:17- bk-03567) (appeal of the PRHTA POA). On October 12, 2022, the District Court entered an order confirming the PRHTA POA and entered its findings of fact and conclusions of law related thereto. On October 24, 2022, a group of present and former employees of PRHTA (“the Vazquez-Velazquez Group”) filed a notice of appeal with respect to, and a motion to stay, the PRHTA POA confirmation order. The Vazquez-Velazquez Group filed its opening brief in the First Circuit on February 15, 2023. The Oversight Board filed its response brief on March 29, 2023. On April 14, 2023, the First Circuit entered an order extending the Vazquez-Velazquez Group’s deadline to file its reply brief to May 4, 2023. Oral argument is scheduled for June 8, 2023.

Student Loans Exposure

CFPB v. Nat’l Collegiate Master Student Loan Trust (United States District Court, District of Delaware, Case No. 1:17-cv-01323, filed September 18, 2017). The Third Circuit is scheduled to hear oral argument in the matter on May 17, 2023.

RMBS Litigation

In connection with AAC’s efforts to seek redress for breaches of representations and warranties and fraud related to the information provided by both the underwriters and the sponsors of various transactions and for failure to comply with the

| Ambac Financial Group, Inc. 30 2023 First Quarter FORM 10-Q |

Notes to Unaudited Consolidated Financial Statements

Ambac Financial Group, Inc. and Subsidiaries

(Dollar Amounts in Millions, Except Share Amounts)

obligation by the sponsors to repurchase ineligible loans, AAC has filed various lawsuits:

•    Ambac Assurance Corporation v. U.S. Bank National Association (United States District Court, Southern District of New York, Docket No. 17-cv-02614, filed April 11, 2017). On October 18, 2022, the Court set a schedule for additional summary judgment briefing, which was concluded on February 10, 2023, and to be followed by briefing on AAC’s proposed use of statistical sampling before proceeding with Phase 2 discovery. Oral argument relating to the additional summary judgment briefing is scheduled to be held on June 5, 2023.

Item 2.     Management’s Discussion and Analysis of Financial Condition and Results of Operations

The objectives of our Management’s Discussion and Analysis of Financial Condition and Results of Operations (“MD&A”) are to provide users of our consolidated financial statements with the following:

•A narrative explanation from the perspective of management of our financial condition, results of operations, cash flows, liquidity and certain other factors that may affect future results;

•Context to the unaudited consolidated financial statements; and

•Information that allows assessment of the likelihood that past performance is indicative of future performance.

The following discussion should be read in conjunction with our consolidated financial statements in Part I, Item 1 and the matters described under Part II, Item 1A Risk Factors in this Quarterly Report and under Item 1A. Risk Factors in our Annual Report on Form 10-K for the year ended December 31, 2022. Refer to Item 1. Business and Note 1. Background and Business Description for a description of our business and our key strategies to achieve our primary goal to maximize shareholder value.

Organization of Information

MD&A includes the following sections:

	Page
Executive Summary	31
Critical Accounting Estimates	33
Financial Guarantees in Force	33
Results of Operations	35
Liquidity and Capital Resources	40
Balance Sheet	42
Variable Interest Entities	47
Accounting Standards	47
U.S. Insurance Statutory Basis Financial Results	47
Ambac UK Financial Results under UK Accounting Principles	47
Non-GAAP Financial Measures	48

EXECUTIVE SUMMARY ($ in millions)

AFG Net Assets

AFG has the following net assets to support its goals and strategies, including the development and growth of its Specialty Property and Casualty Insurance and Insurance Distribution businesses, acquisitions and capital management. AFG does not have any commitment or other obligation to provide capital or liquidity to AAC, whose financial guarantee business has been in run-off since 2008. As of March 31, 2023, AFG's stand alone net assets, excluding its equity investments in subsidiaries, were $224.

Cash and short-term investments	$	179
Other investments (1)	28
Other net assets	17
Total	$	224

(1)Includes strategic minority investments in insurance services businesses of $25.

| Ambac Financial Group, Inc. 31 2023 First Quarter FORM 10-Q |

Segments

AFG's subsidiaries/businesses are divided into three segments with results for the three months ended March 31, 2023 and 2022 as follows:

($ in millions)	Legacy Financial Guarantee Insurance		Specialty Property & Casualty Insurance		Insurance Distribution		Corporate & Other		Consolidated
Three Months Ended March 31, 2023
Premiums placed					$	77			77
Gross premiums written	$	9	$	52					$	61
Net premiums written	9		9						18
Total revenues	32		9		15		$	2	58
Total expenses	64		10		11		2		86
Pretax income (loss)	(32)		(1)		4		—		(29)
Ambac Stockholders’ Equity (1)	824		111		94		224		1,254
Non-redeemable noncontrolling interest	51		2						53
Total stockholders’ equity	$	875	$	113	$	94	$	224	$	1,307
Three Months Ended March 31, 2022
Premiums placed					$	45			45
Gross premiums written	$	6	$	24					$	30
Net premiums written	7		5						12
Total revenues	109		2		9		$	—	119
Total expenses	102		4		6		3		116
Pretax income (loss)	6		(2)		2		(3)		3
Ambac Stockholders’ Equity(1)	567		115		66		166		914
Non-redeemable noncontrolling interest	60								60
Total stockholders’ equity	$	627	$	115	$	66	$	166	$	974

(1)Represents Ambac's stockholders equity for each segment, including intercompany eliminations.

Legacy Financial Guarantee:

A key strategy for Ambac is to increase the value of its investment in AAC by actively managing its assets and liabilities. Asset management primarily entails maximizing the risk-adjusted return on non-VIE invested assets and managing liquidity to help ensure resources are available to meet operational and strategic cash needs. These strategic cash needs include activities associated with Ambac's liability management and loss mitigation programs.

Asset Management

Investment portfolios are subject to internal investment guidelines, as well as limits on the types and quality of investments imposed by insurance laws and regulations. The investment portfolios of AAC and Ambac UK hold fixed maturity securities and various pooled investment funds. Refer to Note 4. Investments to the Unaudited Consolidated Financial Statements, included in Part I, Item 1 in this Form 10-Q for further details of fixed maturity investments by asset category and pooled investment funds by investment type.

At March 31, 2023, AAC owned $287 of distressed Ambac-insured bonds, including significant concentrations of insured RMBS bonds. Subject to internal and regulatory guidelines, market conditions and other constraints, Ambac may continue to opportunistically purchase or sell Ambac-insured securities,

surplus notes and/or other Ambac issued securities, and may consider opportunities to exchange securities issued or insured by it from time to time for other securities issued by it.

Liability and Insured Exposure Management

Ambac's Risk Management Group focuses on the implementation and execution of risk reduction, defeasance and loss recovery strategies. Analysts evaluate the estimated timing and severity of projected policy claims as well as the potential impact of loss mitigation or remediation strategies in order to target and prioritize policies, or portions thereof, for commutation, reinsurance, refinancing, restructuring or other risk reduction strategies. For targeted policies, analysts will engage with issuers, bondholders and other economic stakeholders to negotiate, structure and execute such strategies. Ambac completed risk reduction transactions of $136 of net par exposure related to Puerto Rico for the three months ended March 31, 2023

The following table provides a comparison of total, adversely classified ("ACC") and watch list credit net par outstanding in the insured portfolio at March 31, 2023 and December 31, 2022. Net par exposure within the U.S. public finance market 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 bonds.

| Ambac Financial Group, Inc. 32 2023 First Quarter FORM 10-Q |

	March 31, 2023		December 31, 2022		Decrease
Total	$	22,440	$	22,613	$	(173)	(1)	%
ACC	4,550		4,735		(185)		(4)	%
Watch list	3,026		3,044		(18)		(1)	%

The decrease in total and ACC credit net par outstanding resulted from active de-risking, scheduled maturities, amortizations, refundings and calls, partially offset by a weakening of the USD versus the GBP and EURO.

Banking Sector Crisis of 2023

The recent collapse of several banks precipitated a sudden loss of confidence in the banking system, prompting bank runs and the U.S. government to provide direct support to failed banks and, through an expansive emergency lending program, the system more broadly. In the U.S., this crisis was in part a consequence of rising interest rates, resulting in large declines in the market value of U.S. Treasury and government-backed debt held by banking institutions. The risk of additional bank failures due to asset-liability mismatches or other risks, such as outsized exposure to commercial real estate, remains. Despite recent actions by government agencies and regulators to mitigate the consequences of these bank failures by providing liquidity and guaranteeing uninsured deposits, there is no guarantee that they will provide similar support in the event of additional bank failures. In Europe, regulators stepped in to facilitate mergers of stressed banks into more stable institutions. The ability or willingness of healthy banks to merge with stressed banks in the future is also subject to significant uncertainty.

Ambac's cash balances held at banks was $43 as of March 31, 2023 and $44 as of December 31, 2022. Substantially all of these cash balances were uninsured as of March 31, 2023 and December 31, 2022 because they either (i) exceeded the $250,000 FDIC insurance limit or (ii) were held in foreign banks. These cash balances were held primarily with Ambac's main operating banks which are large money center and/or global banks. Ambac actively manages its cash balances to reduce bank risk and to enhance yield by transferring most of its funds to government and prime money market funds. Included in the cash balances above is $15 of cash of companies Ambac has acquired within its insurance distribution businesses that are held in regional banks. The management of these balances and the associated bank exposure is under consideration as part of Ambac's ongoing integration of these acquired businesses.

Ambac also has exposure to banks through its fixed maturity investment portfolio totaling $157 and $119 as of March 31, 2022, and December 31, 2023. All of these investments are managed by third-party asset management firms which follow single and sector risk limits established by Ambac. The average rating of our fixed income investment in banks was A- as of March 31, 2023.

Russia and Ukraine Conflict

The current conflict between Russia and Ukraine and the related sanctions and other penalties imposed by countries across the globe against Russia are creating substantial uncertainty in the global economy. We do not have operations in Russia or Ukraine

or any insured exposures in those countries. Ambac's investment portfolio exposure to Russian issuers is not meaningful. Given our insignificant exposure, we have not experienced, and do not expect this conflict to have, a material adverse impact on our results of operations, financial condition or cash flows. However, as the conflict continues and if it were to escalate, the global economy and capital markets may be adversely impacted in ways that we cannot predict and therefore we are unable to estimate the ultimate impact that this conflict may have on our future financial condition, results of operations, and cash flows.

Financial Statement Impact of Foreign Currency:

The impact of foreign currency as reported in Ambac's Unaudited Consolidated Statement of Total Comprehensive Income for the three months ended March 31, 2023, included the following:

Net income (1)	$	(2)
Gain (loss) on foreign currency translation (net of tax), included in other comprehensive income	16
Foreign currency impact on unrealized gains (losses) on non-functional currency available-for-sale securities (net of tax), included in other comprehensive income	(4)
Impact on total comprehensive income (loss)	$	10

(1)    A portion of Ambac UK's, and to a lesser extent AAC's, assets and liabilities are denominated in currencies other than its functional currency. Other than the foreign currency impact on unrealized gains (losses) on available-for-sale securities, which is included in Other comprehensive income, foreign currency transaction gains/(losses) as a result of changes to foreign currency rates are reported through Net income in the Unaudited Consolidated Statement of Total Comprehensive Income (Loss).

Future changes to currency rates may adversely affect our financial results. Refer to Part II, Item 7A in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022, for further information on the impact of future currency rate changes on Ambac's financial instruments.

CRITICAL ACCOUNTING ESTIMATES

Ambac’s Unaudited Consolidated Financial Statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”), which require the use of material estimates and assumptions. For a discussion of Ambac’s critical accounting policies and estimates, see “Critical Accounting Policies and Estimates” in Part II, Item 7 “Management’s Discussion and Analysis of Financial Condition and Results of Operations” included in Ambac’s Annual Report on Form 10-K for the year ended December 31, 2022.

FINANCIAL GUARANTEES IN FORCE
($ in millions)

Financial guarantee products were sold in three principal markets: U.S. public, U.S. structured and international finance. The following table provides a breakdown of guaranteed net par outstanding by market at March 31, 2023 and December 31, 2022. Net par exposures within the U.S. public finance market 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 bonds. Guaranteed net par outstanding includes the exposures of policies insuring variable

| Ambac Financial Group, Inc. 33 2023 First Quarter FORM 10-Q |

interest entities (“VIEs”) consolidated in accordance with the Consolidation Topic of the ASC. Guaranteed net par outstanding excludes the exposures of policies that insure bonds which have been refunded or pre-refunded.

	March 31, 2023		December 31, 2022
Public Finance (1) (2)	$	10,318	$	10,547
Structured Finance	3,524		3,612
International Finance	8,598		8,454
Total net par outstanding	$	22,440	$	22,613

(1)Includes $5,377 and $5,400 of Military Housing net par outstanding at March 31, 2023 and December 31, 2022, respectively.

(2)Includes $106 and $244 of Puerto Rico net par outstanding at March 31, 2023 and December 31, 2022, respectively.

The table below shows Ambac’s ten largest insured exposures, by repayment source, as a percentage of total financial guarantee net par outstanding at March 31, 2023:

Sector	Co.	Bond Kind	Country-Bond Type	Ambac Ratings (1)	Ultimate Maturity Year	Net Par Outstanding		% of Total Net Par Outstanding
IF	AUK	Investor Owned Utility Gas - unsecured	UK-Utility	BBB+	2037	$	838	2.8	%
IF	AUK	Other Asset Securitizations	UK-Asset Securitizations	BBB	2033	737		3.1	%
IF	AUK	PFI - Accommodation	UK-Infrastructure	A-	2040	727		3.3	%
IF	AUK	PFI - Hospitals	UK-Infrastructure	A-	2046	704		3.7	%
IF	AUK	Investor Owned Utility Other - unsecured	UK-Utility	A-	2035	628		3.2	%
IF	AUK	Sub-Sovereign	Italy-Sub-Sovereign	BIG	2035	599		2.2	%
IF	AUK	Investor Owned Utility Electric - unsecured	UK-Utility	BBB+	2036	576		2.7	%
PF	AAC	US State Lease/Appropriation	US-Lease and Tax-backed Revenue	BBB-	2036	489		2.6	%
IF	AUK	PFI - Accommodation	UK-Infrastructure	BBB+	2038	472		2.1	%
PF	AAC	Military Housing	US-Housing Revenue	BBB-	2052	449		2.0	%
Total						$	6,219	27.7	%
PF = Public Finance, SF = Structured Finance, IF = International Finance AAC = Ambac Assurance, AUK = Ambac UK

(1)    Internal credit ratings are provided solely to indicate the underlying credit quality of guaranteed obligations based on the view of Ambac. In cases where Ambac has insured multiple tranches of an issue with varying internal ratings, or more than one obligation of an issuer with varying internal ratings, a weighted average rating is used. Ambac credit ratings are subject to revision at any time and do not constitute investment advice. BIG denotes credits deemed below investment grade.

Net par related to the top ten exposures increased $103 from December 31, 2022. Exposures are impacted by changes in foreign exchange rates ($108 increase during the three months ended March 31, 2023), certain indexation rates, reinsurance transactions and scheduled and unscheduled paydowns. As a result of recent increases in inflation, such indexation exposures have increased at a faster pace than they have historically.

The concentration of net par amongst the top ten (as a percentage of net par outstanding) was 28% at March 31, 2023, and 27% at December 31, 2022. Excluding the top ten exposures, the remaining insured portfolio of financial guarantees has an average net par outstanding of $30 per single risk, with insured exposures ranging up to $384 and a median net par outstanding of $5.

Given that Ambac has not written any new financial guaranty insurance policies since 2008, the legacy financial guarantee insured portfolio is expected to become increasingly concentrated to large and/or below investment grade exposures.

Exposure Currency

The table below shows the distribution by currency of AAC’s insured exposure as of March 31, 2023:

Currency	Net Par Amount Outstanding in Base Currency		Net Par Amount Outstanding in U.S. Dollars
U.S. Dollars	$	14,023	$	14,023
British Pounds	£	5,832	7,194
Euros	€	892	969
Australian Dollars	A$	380	254
Total			$	22,440

| Ambac Financial Group, Inc. 34 2023 First Quarter FORM 10-Q |

Ratings Distribution

The following charts provide a rating distribution of net par outstanding based upon internal Ambac credit ratings(1) and a distribution by bond type of Ambac's below investment grade ("BIG") net par exposures at March 31, 2023 and December 31, 2022. BIG is defined as those exposures with an Ambac internal credit rating below BBB-:

Note: AAA is less than 1% in both periods.

(1)Internal credit ratings are provided solely to indicate the underlying credit quality of guaranteed obligations based on the view of Ambac. In cases where Ambac has insured multiple tranches of an issue with varying internal ratings, or more than one obligation of an issuer with varying internal ratings, a weighted average rating is used. Ambac credit ratings are subject to revision at any time and do not constitute investment advice.

Summary of Below Investment Grade Exposure:

	Net Par Outstanding
Bond Type	March 31, 2023		December 31, 2022
Public Finance:
Military Housing	$	365	$	366
Puerto Rico	106		244
Other	212		213
Total Public Finance	683		823
Structured Finance:
RMBS	1,794		1,841
Student loans	273		275
Total Structured Finance	2,068		2,117
International Finance:
Sovereign/sub-sovereign	712		701
Transportation	315		310
Other	—		2
Total International Finance	1,027		1,013
Total	$	3,778	$	3,953

The net decline in below investment grade exposures is primarily due to the Puerto Rico de-risking of $136.

Below investment grade exposures could increase as a relative proportion of the guarantee portfolio given that stressed borrowers generally have less ability to prepay or refinance their debt. Accordingly, due to these and other factors, it is not unreasonable to expect the proportion of below investment grade exposure in the guarantee portfolio to increase in the future.

Results of Operations ($ in millions)

Consolidated Results

A summary of our financial results is shown below:

Three Months Ended March 31,	2023		2022
Gross premiums written	$	61	$	30
Revenues:
Net premiums earned	$	14	$	15
Commission income	14		9
Program fees	1		—
Net investment income	34		5
Net investment gains (losses), including impairments	(4)		10
Net gains (losses) on derivative contracts	(4)		57
Income (loss) on variable interest entities	(1)		22
Other income	3		2
Expenses:
Losses and loss adjustment expenses	18		24
Amortization of deferred acquisition costs, net	1		—
Commission expense	8		5
General and administrative expenses	36		29
Intangible amortization	7		14
Interest expense	16		44
Provision for income taxes	4		—
Net income (loss)	(33)		2
Less: net (gain) loss attributable to noncontrolling interest	(1)		—
Net income (loss) attributable to common stockholders	$	(33)	$	2

| Ambac Financial Group, Inc. 35 2023 First Quarter FORM 10-Q |

The following paragraphs describe the consolidated results of operations of Ambac and its subsidiaries for the three months ended March 31, 2023 and 2022, respectively.

Gross Premiums Written. Gross premiums written increased $30 for the three months ended March 31, 2023, compared to the same period in the prior year, as shown by segment below.

Three Months Ended March 31,	2023		2022
Legacy Financial Guaranty Insurance	$	9	$	6
Specialty Property & Casualty Insurance	52		24
Total	$	61	$	30

Legacy Financial Guarantee Insurance gross written premiums relate to changes in expected and contractual premium cash flows for existing financial guarantees in force.

Net Premiums Earned. Net premiums earned decreased $1 for the three months ended March 31, 2023, compared to the same period in the prior year as shown by segment below.

Three Months Ended March 31,	2023		2022
Legacy Financial Guaranty Insurance	$	7	$	13
Specialty Property & Casualty Insurance	7		1
Total	$	14	$	15

The reduction in Legacy Financial Guarantee Insurance segment was primarily due to de-risking activities, including the Puerto Rico restructurings, and run-off of the insured portfolio.

Net Investment Income. Net investment income primarily consists of interest and net discount accretion on fixed maturity securities classified as available-for-sale, interest and changes in fair value of fixed maturity securities classified as trading, and net gains (losses) on pooled investment funds which include changes in fair value of the funds' net assets. Fixed maturity securities include investments in Ambac-insured securities that are made opportunistically based on their risk/reward and asset-liability management characteristics. Investments in pooled investment funds and certain other investments are either classified as trading securities with changes in fair value recognized in earnings or are reported under the equity method. These funds and other investments are reported in Other investments on the Unaudited Consolidated Balance Sheets, which consists primarily of pooled fund investments in diversified asset classes. For further information about investment funds held, refer to Note 4. Investments to the Unaudited Consolidated Financial Statements, included in Part I, Item 1 in this Form 10-Q. Net investment income for the periods presented were driven by the legacy financial guarantee segment; other segments' results were not significant.

Net investment income from Ambac-insured securities; available-for-sale and short-term securities, other than Ambac-insured; and Other investments is summarized in the table below:

Three Months Ended March 31,	2023		2022
Securities available-for-sale and short-term other than Ambac-insured	$	16	$	7
Other investments (includes trading securities)	13		(9)
Securities available-for-sale: Ambac-insured (including secured notes)	5		7
Net investment income (loss)	$	34	$	5

Net investment income (loss) increased $29 for the three months ended March 31, 2023 compared to the prior year periods.

•Net investment income from available-for-sale and short-term securities, other than Ambac-insured increased for the three months ended March 31, 2023, compared to the same periods in the prior year due primarily to higher portfolio yields and, to a lesser extent, higher average holdings.

•Other investments income (loss) increased $22 for the three months ended March 31, 2023, compared to the same periods in the prior year. Pooled fund investments results increased $12 for the three months ended March 31, 2023, compared to the prior year period, driven by improved performance on equities, high-yield and leveraged loans and private equity offset by lower returns on real estate. Investments in pooled funds may be volatile, but are generally expected to produce higher returns than available-for-sale investments. The three months ended March 31, 2023 also included gains of less than $1 on securities received in the Puerto Rico restructurings which are classified as trading. These trading securities produced losses of $(9) for the three months ended March 31, 2022.

•Net investment income from Ambac-insured securities for the three months ended March 31, 2023, decreased $2 compared to the prior year periods, due to settlement of insured Puerto Rico bonds in 2022.

Net Investment Gains (Losses), including Impairments. The following table provides a breakdown of net investment gains (losses) for the periods presented:

Three Months Ended March 31,	2023		2022
Net gains (losses) on securities sold or called	$	(1)	$	8
Net foreign exchange gains (losses)	(2)		3
Credit impairments	(1)		(1)
Intent / requirement to sell impairments	—		—
Net investment gains (losses), including impairments	$	(4)	$	10

Net gains (losses) on securities sold or called for the three months ended March 31, 2022, included a recovery of $9 from a class-action settlement relating to certain RMBS securities previously held in the investment portfolio. Other net realized gains (losses) on securities sold or called during both periods were primarily from sales in connection with routine portfolio management.

Credit impairments are recorded as an allowance for credit losses with changes in the allowance recorded through earnings. When credit impairments are recorded, any non-credit related impairment amounts on the securities are recorded in other comprehensive income. If management either: (i) has the intent to sell its investment in a debt security or (ii) determines that the Company is more likely than not will be required to sell the debt

| Ambac Financial Group, Inc. 36 2023 First Quarter FORM 10-Q |

security before its anticipated recovery, then the amortized cost of the security is written-down to fair value with a corresponding impairment charge recognized in earnings.

Net Gains (Losses) on Derivative Contracts. Net gains (losses) on derivative contracts are driven primarily by results from the Company's interest rate derivatives portfolio. The interest rate derivatives portfolio is positioned to benefit from rising rates as a partial economic hedge against interest rate exposure in the financial guarantee insurance and investment portfolios. This economic hedge positioning was substantially reduced for the three months ended March 31, 2023, compared to the prior year period. Net gains (losses) on interest rate derivatives generally reflect mark-to-market gains (losses) in the portfolio caused by increases (declines) in forward interest rates during the periods, the carrying cost of the portfolio, and the impact of counterparty credit adjustments as discussed below. Results from other derivatives were not significant to the periods presented.

Net gains (losses) on interest rate derivatives for the three months ended March 31, 2023, were $(4) compared to $57 for the three months ended March 31, 2022. The net loss for the three months ended March 31, 2023, resulted primarily from interest rate decreases during the period and a higher counterparty credit adjustment on certain derivative assets. The net gains in 2022 were driven by significant rate increases in the period combined with favorable portfolio positioning, and the impact of changing credit spreads in derivative assets as described further below.

Counterparty credit adjustments are generally applicable for uncollateralized derivative assets that may not be offset by derivative liabilities under a master netting agreement. In periods when credit spreads are stable, counterparty credit adjustments will generally have a proportionate offsetting impact to gains or losses on derivative assets, relative to fully collateralized assets. In addition to the impact of interest rates on the underlying derivative asset values, the changes in counterparty credit adjustments are driven by movement of credit spreads. Generally, narrowing (widening) of credit spreads will increase (decrease) derivative gains relative to a period of stable credit spreads. Inclusion of counterparty credit adjustments in the valuation of interest rate derivatives resulted in gains (losses) within Net gains (losses) on derivative contracts of $(1) and $2 for the three months ended March 31, 2023 and 2022, respectively. The counterparty credit adjustments for both periods were driven primarily by changes to the underlying asset values.

Commissions Income and Commission Expense. Commission income for the three months ended March 31, 2023 was $14 compared to $9, for the three months ended March 31, 2022. Commissions include both base and profit sharing commissions of the Insurance Distribution segment. The increase was driven by (i) commissions earned on All Trans and Capacity Marine, which were purchased in November 2022 and (ii) greater premiums placed by Xchange Benefits. Gross commission income has an accompanying expense, commission expense, which will largely track changes in gross commission. For the three months ended March 31, 2023, commission expense of $8 compared to $5 in three months ended March 31, 2022, driven primarily by the same factors as commission income.

Income (Loss) on Variable Interest Entities. Included within Income (loss) on variable interest entities are income statement amounts relating to FG VIEs, consolidated under the Consolidation Topic of the ASC as a result of Ambac's variable interest arising from financial guarantees written by Ambac's subsidiaries, including gains or losses attributable to consolidating or deconsolidating FG VIEs during the periods reported. Generally, the Company’s consolidated FG VIEs are entities for which Ambac has provided financial guarantees on all of or a portion of its assets or liabilities. In consolidation, assets and liabilities of the FG VIEs are initially reported at fair value and the related insurance assets and liabilities are eliminated. However, the amount of FG VIE net assets (liabilities) that remain in consolidation generally result from the net positive (negative) projected cash flows from (to) the FG VIEs which are attributable to Ambac’s insurance subsidiaries in the form of financial guarantee insurance premiums, fees and losses. In the case of FG VIEs with net negative projected cash flows, the net liability is generally to be funded by Ambac’s insurance subsidiaries through insurance claim payments. Differences between the net carrying value of the insurance accounts under the Financial Services—Insurance Topic of the ASC and the carrying value of the consolidated FG VIE’s net assets or liabilities are recorded through income at the time of consolidation. Additionally, terminations or other changes to Ambac's financial guarantee insurance policies that impact projected cash flows between a consolidated FG VIE and Ambac could result in gains or losses, even if such policy changes do not result in deconsolidation of the FG VIE.

Income (loss) on variable interest entities was $(1) for the three months ended March 31, 2023, compared to $22 for the three months ended March 31, 2022. Results for the three months ended March 31, 2023 were impacted by accelerated interest costs from a VIE trust created in connection with the Puerto Rico restructurings, partially offset by gains on higher valuation of net assets on other FG VIEs. Results for the three months ended March 31, 2022, related primarily to two VIE trusts created in connection with the Puerto Rico restructurings in March 2022. The three months ended March 31, 2022 included the initial $28 gain upon consolidation on March 15, 2022, partially offset by subsequent declines in the fair value of the trusts' assets through March 31, 2022.

Refer to Note 9. Variable Interest Entities to the Unaudited Consolidated Financial Statements, included in Part I, Item 1 in this Form 10-Q for further information on the accounting for FG VIEs.

Losses and Loss Expenses. Loss and loss expenses decreased $6 for the three months ended March 31, 2023, compared to the same period in the prior year. Legacy financial guarantee loss and loss expenses (benefit) were $13 for the three months ended March 31, 2023. Specialty Property and Casualty Insurance loss and loss expenses were $5 for the three months ended March 31, 2023.

Intangible Amortization. Insurance intangible amortization for the three months ended March 31, 2023, was $6, a decrease of $8 as compared to the the three months ended March 31, 2022.

| Ambac Financial Group, Inc. 37 2023 First Quarter FORM 10-Q |

The decrease was driven primarily by the timing of de-risking (including Puerto Rico in the three months ended March 31, 2022) and the reduced size of the financial guarantee insured portfolio. Insurance intangible amortization will decline after policies mature or de-risked. Other intangible amortization for the three months ended March 31, 2023, was $1 and $1 for the three months ended March 31, 2023 and 2022, respectively.

General and Administrative Expenses (G&A). The following table provides a summary of G&A expenses for the periods presented:

Three Months Ended March 31,	2023		2022
Compensation	$	16	$	16
Non-compensation	20		13
Total G&A expenses	36		29

The increase in G&A expenses during the three months ended March 31, 2023, as compared to the three months ended March 31, 2022, was due to the following:

•Higher non-compensation costs primarily related to Legacy Financial Guarantee Insurance segment legal defense costs.

•Higher compensation costs due to a net increase in staffing resulting from the development and growth, both organic and via acquisitions, of the Specialty Property & Casualty Insurance and Insurance Distribution segments, partially offset by lower incentive compensation expense including the impact of performance factor adjustments.

Interest Expense. All interest expense relates to the Legacy Financial Guarantee Insurance segment and includes accrued interest on the Sitka AAC Note (fully redeemed during the fourth quarter of 2022), Tier 2 Notes (fully redeemed during the first quarter of 2023), surplus notes and other debt obligations. Additionally, interest expense includes discount accretion when the debt instrument carrying value is at a discount to par. The following table provides details by type of obligation for the periods presented:

Three Months Ended March 31,	2023		2022
Surplus notes	$	16	$	20
Sitka AAC note	—		17
Tier 2 Notes	—		7
Other	—		—
Total interest expense	$	16	$	44

The decrease in interest expense for the three months ended March 31, 2023, compared to the three months ended March 31, 2022, reflects the impact of the 2022 redemption of secured notes as further described in Note 1. Background and Business Description, in the Notes to the Consolidated Financial Statements included in Part II, Item 8 in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022. These transactions resulted in lower debt outstanding. Interest expense for 2023 also declined as a result of repurchases of surplus notes during 2022. These benefits were partially offset by the effects of interest compounding on surplus notes.

Surplus note principal and interest payments require the approval of OCI. In May 2023, OCI declined the request of AAC to pay

the principal amount of the surplus notes, plus all accrued and unpaid interest thereon, on the then next scheduled payment date of June 7, 2023. As a result, the scheduled payment date for interest, and the scheduled maturity date for payment of principal of the surplus notes, was extended until OCI grants approval to make the payment. Interest will accrue, compounded on each anniversary of the original scheduled payment date or scheduled maturity date, on any unpaid principal or interest through the actual date of payment, at 5.1% per annum. Holders of surplus notes will have no rights to enforce the payment of the principal of, or interest on, surplus notes in the absence of OCI approval to pay such amount. The interest on the outstanding surplus notes were accrued for and AAC is accruing interest on the interest amounts following each scheduled payment date. Total accrued and unpaid interest for surplus notes outstanding to third parties was $438 at March 31, 2023. Since the issuance of the surplus notes in 2010, OCI has declined to approve regular payments of interest on surplus notes, although the OCI has permitted two exceptional payments.

Provision for Income Taxes. The provision for income taxes for the three months ended March 31, 2023 and 2022, was $4, and $0 respectively, an increase of $3 and primarily relate to international operations.

Results of Operations by Segment

Legacy Financial Guarantee Insurance

Three Months Ended March 31,	2023		2022
Revenues:
Net premiums earned	$	7	$	13
Net investment income	31		5
Net investment gains (losses), including impairments	(4)		10
Net gains on derivative contracts	(3)		57
Other income	2		24
Total	32		109
Expenses:
Loss and loss expenses (benefit)	13		23
General and administrative expenses	28		21
Total	41		44
Earnings before interest, taxes, depreciation and amortization (1)	(9)		65
Interest expense	16		44
Depreciation	—		—
Intangible amortization	6		14
Pretax income (loss)	$	(32)	$	6
Stockholders equity (2)	$	824	$	567

(1)Abbreviated as "EBITDA" in future references

(2)Represents the share of Ambac stockholders equity for each subsidiary within the Legacy Financial Guarantee Insurance segment, including intercompany eliminations.

The Legacy Financial Guarantee Insurance segment is in active runoff. This will generally result in declining premiums earned, investment income, G&A expenses and intangible amortization. The variability in the segment financial results are primarily driven by (i) changes in loss and loss expenses resulting from, amongst other items, credit developments, interest rates and de-

| Ambac Financial Group, Inc. 38 2023 First Quarter FORM 10-Q |

risking transactions; (ii) changes in interest rates as they impact net gains (losses) on derivative contracts and interest expense on the floating rate Sitka AAC Note prior to its redemption, and (iii) volatility from Other investments income (loss) resulting from changes in market conditions and other performance factors. Key variances not discussed above in the Consolidated Results section are as follows:

Net premiums earned. Net premiums earned decreased $7 for the three months ended March 31, 2023, compared to the same period in the prior year. Net premiums earned were impacted by the organic and active runoff of the financial guarantee insured portfolio, resulting in a reduction to current and future normal net premiums earned and the following:

•Changes to the allowance for credit losses on the premium receivable asset. The positive impact on net premiums earned related to credit losses amounted to $0 for the three months ended March 31, 2023, as compared to $1 for the three months ended March 31, 2022.

•Accelerated financial guarantee premiums earned as a result of calls and other accelerations on insured obligations, largely due to active de-risking of the insured portfolio, were deminimis for the three months ended March 31, 2023, as compared to $4 for the three months ended March 31, 2022.

Losses and Loss Expenses. The following provides details for losses and loss expenses (benefit) incurred for the periods presented:

Three Months Ended March 31,	2023		2022
Structured Finance	$	20	$	213
Domestic Public Finance	3		(190)
Other, including International Finance	(10)		1
Totals	$	13	$	23

Loss and loss expenses (benefit) for the three months ended March 31, 2023, were largely driven by unfavorable loss development in the RMBS portfolio resulting from a decline in discount rates, partially offset by assumption changes in the international portfolio.

Losses and loss expenses (benefit) for the three months ended March 31, 2022, were driven by a reduction to AAC’s estimated R&W subrogation recoveries in the amount of $224, partially offset by favorable loss development in domestic public finance, primarily due to the Puerto Rico restructuring.

G&A Expenses. The increases in G&A expenses of $7 during the three months ended March 31, 2023, as compared to the three months ended March 31, 2022, is due to additional legal fees related to defensive litigation costs, increased severance costs and the timing of expense reimbursements to Corporate that are recognized when approved by the Office of the Commissioner of Insurance for the State of Wisconsin (“OCI”). These increases were partially offset by lower compensation costs due to reduced headcount within the segment and lower incentive compensation including the impact of performance factor adjustments.

Specialty Property and Casualty Insurance

Three Months Ended March 31,	2023			2022
Gross premiums written	$	52		$	24
Net premiums written	9			5
Revenues:
Net premiums earned	$	7		$	1
Investment income	1			—
Net investment gains (losses), including impairments	—			—
Program fees	1			—
Total	9			2
Expenses:
Losses and loss expenses incurred	5			1
Amortization of deferred acquisition costs, net	1			—
General and administrative expenses	4			3
Total	10			4
EBITDA	(1)			$	(2)
Pretax income (loss)	$	(1)		$	(2)
Loss and LAE Ratio	66.6		%	65.3		%
Combined Ratio	129.7		%	302.4		%
Ambac's stockholders equity (1)	$	111		$	115

(1)Represents Ambac stockholders equity in the Specialty Property and Casualty Insurance segment, including intercompany eliminations.

The Specialty Property and Casualty Insurance segment has grown significantly since underwriting its first program in May 2021. Fifteen programs were authorized to issue policies as of March 31, 2023. The growth in both the number and size of these programs has contributed to the increase in gross and net premiums written, net premiums earned and net loss and loss expenses incurred.

Loss and loss expenses incurred may be adversely impacted by increasing economic and social inflation, particularly within the commercial auto business. The impact of inflation on ultimate loss reserves is difficult to estimate, particularly in light of recent disruptions to the judicial system, supply chain and labor markets. In addition, on a going forward basis, we may not be able to offset the impact of inflation on our loss costs with sufficient price increases. The estimation of loss reserves may also be more difficult during extreme events, such as a pandemic, or during the persistence of volatile or uncertain economic conditions, due to, amongst other reasons, unexpected changes in behavior of claimants and policyholders, including an increase in fraudulent reporting of exposures and/or losses. Due to the inherent uncertainty underlying loss reserve estimates, the final resolution of the estimated liability for loss and loss expenses will likely be higher or lower than the related loss reserves at the reporting date. In addition, our estimate of losses and loss expenses may change. These additional liabilities or increases in estimates, or a range of either, could vary significantly from period to period.

General and administrative costs increased for the three months ended March 31, 2023 relative to the three months ended March 31, 2022 primarily resulting from the ramp up in Everspan's staffing and operations. Additionally, the three months ended March 31, 2022 included costs associated with the acquisition of additional shell insurance companies in January 2022.

| Ambac Financial Group, Inc. 39 2023 First Quarter FORM 10-Q |

Insurance Distribution

Three Months Ended March 31,	2023		2022
Premiums placed	$	77	$	45
Commission income	$	14	$	9
Commission expense	8		5
Net commissions	7		4
Expenses:
General and administrative expenses (1)	2		1
EBITDA	5		3
Depreciation (1)	—		—
Intangible amortization	1		1
Pretax income (loss)	$	4	$	2
Ambac's stockholders equity (2)	$	94	$	66

(1)    The Consolidated Statements of Comprehensive Income presents the sum of these items as General and Administrative Expenses.

(2)    Represents the share of Ambac stockholders equity for each subsidiary within the Insurance Distribution segment, including intercompany eliminations.

Ambac's Insurance Distribution businesses are compensated for their services primarily by commissions paid by insurance carriers for underwriting, structuring and/or administering polices. Commission revenues are usually based on a percentage of the premiums placed. In addition, we are eligible to receive profit sharing contingent commissions on certain programs based on the underwriting results of the policies placed with carriers, which may cause some variability in revenue and earnings.

The Insurance Distribution segment placed premiums for its carriers of approximately $77 for the three months ended March 31, 2023, up $32 or 72% as compared to the three months ended March 31, 2022. Higher premiums placed were driven by organic growth at Xchange, the acquisition of All Trans and Capacity Marine and the April 29, 2022, ESL renewal rights acquisition. The increase in premiums placed and changes to the mix of business written led to the growth in commission income and commission expense of 69% and 76%, respectively.

Employer Stop Loss business underwritten by Xchange has seasonality in January and July, which results in revenue and earnings concentrations in the first and third quarters each calendar year. ESL is Xchange's largest business.

G&A Expenses. G&A expenses for the three months ended March 31, 2023, increased compared to the three months ended March 31, 2022, as a result of the All Trans and Capacity Marine acquisitions as well as employees hired to support the ESL renewal rights acquisition.

LIQUIDITY AND CAPITAL RESOURCES
($ in millions)

Holding Company Liquidity

AFG is organized as a legal entity separate and distinct from its operating subsidiaries. AFG is a holding company with no outstanding debt. AFG's liquidity is primarily dependent on its net assets, excluding the operating subsidiaries that it owns,

totaling $224 as of March 31, 2023, and secondarily on distributions and expense sharing payments from its operating subsidiaries.

•Under an inter-company cost allocation agreement, AFG is reimbursed by AAC for a portion of certain operating costs and expenses and, if approved by OCI, entitled to an additional payment of up to $4 per year to cover expenses not otherwise reimbursed. The $4 reimbursement for 2022 and 2021 expenses was approved by OCI and paid to AFG during March of 2023 and April of 2022, respectively.

•Substantial uncertainty remains as to AAC's ability to pay dividends to AFG and the timing of any such dividends.

•Everspan's ability to make future dividend payments will mostly depend on its future profitability relative to its capital needs to support growth. Everspan is not expected to pay dividends in the near term.

•Cirrata does not have any regulatory restrictions on its ability to make distributions. AFG received distributions from Cirrata of $2 and $2 during the three months ended March 31, 2023 and 2022.

AFG's principal uses of liquidity are: (i) the payment of G&A expenses, including costs to explore opportunities to grow and diversify Ambac, (ii) the making of strategic investments, which are generally illiquid and (iii) making capital investments to acquire, grow and/or capitalize new and/or existing businesses. AFG may also provide short-term financial support, primarily in the form of loans, to its operating subsidiaries to support their operating requirements.

In the opinion of the Company’s management the net assets of AFG are sufficient to meet AFG’s current liquidity requirements. However, events, opportunities or circumstances could arise that may cause AFG to seek additional capital (e.g. through the issuance of debt, equity or hybrid securities).

Operating Companies' Liquidity

Insurance

Sources of liquidity for the Company’s insurance subsidiaries are through funds generated from premiums; recoveries on claim payments, including RMBS representation and warranty subrogation recoveries (AAC only); reinsurance recoveries; fees; investment income and maturities and sales of investments.

•See Note 6. Insurance Contracts to the Consolidated Financial Statements included in Part I, Item 1., in this Form 10-Q for a summary of future gross financial guarantee premiums to be collected by AAC and Ambac UK. Termination of financial guarantee policies on an accelerated basis may adversely impact AAC’s liquidity.

Cash provided from these sources is used primarily for claim payments and commutations, loss expenses and acquisition costs (Specialty Property & Casualty Insurance segment only), debt service on outstanding debt (Legacy Financial Guarantee segment only), G&A expenses, reinsurance payments and purchases of

| Ambac Financial Group, Inc. 40 2023 First Quarter FORM 10-Q |

securities and other investments that may not be immediately converted into cash.

•Interest and principal payments on surplus notes are subject to the approval of OCI, which has full discretion over payments regardless of the liquidity position of AAC. As discussed more fully in "Results of Operations" above in this Management's Discussion and Analysis, OCI declined AAC's request to pay the principal amount of the surplus notes, plus all accrued and unpaid interest thereon, on June 7, 2023. Current principal outstanding on AAC's long-term debt consisted of $519 of surplus notes. AAC's future interest obligations on long-term debt include $496 of accrued and unpaid interest that would be payable on surplus notes if approved by OCI on the next scheduled payment date of June 7, 2024.

•Ambac Financial Services ("AFS") uses interest rate derivatives (primarily interest rate swaps and US Treasury futures) as a partial economic hedge against the effects of rising interest rates elsewhere in the Legacy Financial Guarantee segment. AFS's derivatives also include interest rate swaps previously provided to asset-backed issuers and other entities in connection with their financings. AAC lends AFS cash and securities as needed to fund payments under these derivative contracts, collateral posting requirements and G&A expenses. Intercompany loans are governed by an established lending agreement with defined borrowing limits that has received non-disapproval from OCI.

Insurance subsidiaries manage their liquidity risk by maintaining comprehensive analyses of projected cash flows and maintaining specified levels of cash and short-term investments at all times. It is the opinion of the Company’s management that the insurance subsidiaries’ near term liquidity needs will be adequately met from the sources described above.

Insurance Distribution:

The liquidity requirements of our Insurance Distribution subsidiaries are met primarily by funds generated from commission receipts (both base and profit commissions). Base commissions are generally received monthly, whereas profit commissions are received only if the business underwritten is profitable. Cash provided from these sources is used primarily for commissions paid to sub-producers, G&A expenses and distributions to AFG and other members.

Consolidated Cash Flow Statement Discussion.

The following table summarizes the net cash flows for the periods presented.

Three Months Ended March 31,	2023		2022
Cash provided by (used in):
Operating activities	$	77	$	9
Investing activities	441		136
Financing activities (1)	(276)		(52)
Foreign exchange impact on cash and cash equivalents	—		—
Net cash flow	$	243	$	93

(1)    During the first quarter of 2023, AAC made $108 of payments to accelerate AAC-insured bonds that were deposited into trusts established under the Puerto Rico restructurings. Because the trusts are consolidated VIEs, these payments are reflected as payments of VIE liabilities within financing activities in the first quarter 2023.

Operating activities

The following represents the significant cash operating activity during the three months ended March 31, 2023 and 2022:

•Cash provided by (i) gross premiums were $48 and $28 for the three months ended March 31, 2023 and 2022, respectively; (ii) interest rate derivatives were $11 and $11 for the three months ended March 31, 2023 and 2022, respectively; (iii) investment portfolio income were $20 and $14 for the three months ended March 31, 2023 and 2022, respectively; and (iv) cash settlements from the Puerto Rico restructuring transactions to the consolidated trusts was $47 for the three months ended March 31, 2022.

•Interest payments, including accumulated paid-in-kind interest on the Tier 2 Notes, were $50 for the three months ended March 31, 2023 and $15 for the three months ended March 31, 2022.

•Payments related to (i) G&A expenses were $37 and $34 for the three months ended March 31, 2023 and 2022, respectively; and (ii) reinsurance premiums paid were $31 and $7 for the three months ended March 31, 2023 and 2022, respectively

•Net Legacy Financial Guarantee Insurance loss and loss expenses paid, including commutation payments, during the three months ended March 31, 2023 and 2022 are detailed below:

Three Months Ended March 31,	2023		2022
Net loss and loss expenses paid (recovered):
Net losses paid	$	5	$	213
Net subrogation received (1)	(148)		(177)
Net loss expenses paid	3		(8)
Net cash flow	$	(140)	$	28

(1) 2023 includes Nomura R&W settlement proceeds of $140

Future operating flows will primarily be impacted by net premium collections and investment coupon receipts, G&A expenses, net claim and loss expense payments and interest payments on outstanding debt.

| Ambac Financial Group, Inc. 41 2023 First Quarter FORM 10-Q |

Financing Activities

Financing activities for the three months ended March 31, 2023, included redemption of the Tier 2 Notes of $97 and paydowns and maturities of VIE debt obligations of $174 (including payments for the accelerations of the VIE trusts created from the Puerto Rico restructuring).

Financing activities for the three months ended March 31, 2022, include paydowns and maturities of VIE debt obligations of $49.

Collateral

AFS hedges a portion of the interest rate risk in the Legacy Financial Guarantee Insurance segment financial guarantee and investment portfolios, along with legacy customer interest rate swaps, with standardized derivative contracts, including financial futures contracts, which contain collateral or margin requirements. Under these hedge agreements, AFS is required to post collateral or margin to its counterparties and futures commission merchants to cover unrealized losses. In addition, AFS is required to post collateral or margin in excess of the amounts needed to cover unrealized losses. All AFS derivative contracts containing ratings-based downgrade triggers that could result in collateral or margin posting or a termination have been triggered. If terminations were to occur, AFS would be required to make termination payments but would also receive a return of collateral or margin in the form of cash or U.S. Treasury obligations with market values equal to or in excess of market values of the swaps and futures contracts. AFS may look to re-establish hedge positions that are terminated early, resulting in additional collateral or margin obligations. The amount of additional collateral or margin posted on derivatives contracts will depend on several variables including the degree to which counterparties exercise their termination rights (or agreements terminate automatically) and the terms on which hedges can be replaced. All collateral and margin obligations are currently met. Collateral and margin posted by AFS totaled a net amount of $71 (cash and securities collateral of $9 and $61, respectively), including independent amounts, under these contracts at March 31, 2023.

BALANCE SHEET ($ in millions)

Total assets increased by approximately $246 from December 31, 2022, to $8,219 at March 31, 2023, primarily due to: (i) the increase in asset values of VIEs of $422, (ii) higher values on non-VIE invested assets and (iii) increases in premium receivables and reinsurance recoverables as a result of growth in the specialty P&C businesses. The increase in VIE assets was driven by collateral received by FG VIEs and increased asset values including due to impact of the strengthening of the British Pound Sterling against the US dollar. These factors were partially offset by (i) debt payments of $146 for the full redemption of Tier 2 Notes, and (ii) $108 of payments from Ambac Assurance to support partial redemptions of HTA Trust Certificates.

Total liabilities increased by approximately $245 from December 31, 2022, to $6,892 as of March 31, 2023, primarily due to increases in the value of VIEs liabilities of $329 (consistent factors as noted above in assets, including redemptions of HTA Trust Certificates). Additional liability increases driven by (i) higher loss and loss adjustment expense reserves and (ii) an increase in unearned premium from the specialty P&C businesses. These increases to total liabilities were partially offset by the redemption of the Tier 2 Notes of $146.

As of March 31, 2023, total stockholders’ equity was $1,307, compared with total stockholders’ equity of $1,305 at December 31, 2022. This increase was primarily due to a decrease in unrealized losses on invested assets and gains on foreign currency translation, partially offset by the net loss for the three months ended March 31, 2022.

Investment Portfolio

Ambac's investment portfolio is managed under established guidelines designed to meet the investment objectives of AAC, Everspan Group, Ambac UK and AFG. Refer to "Description of the Business – Investments and Investment Policy" located in Part I. Item 1 of the Company’s Annual Report on Form 10-K for the year ended December 31, 2022, for further description of Ambac's investment policies and applicable regulations.

Ambac's investment policies and objectives do not apply to the assets of VIEs consolidated as a result of financial guarantees written by its insurance subsidiaries.

| Ambac Financial Group, Inc. 42 2023 First Quarter FORM 10-Q |

The following table summarizes the composition of Ambac’s investment portfolio, excluding VIE investments, at carrying value at March 31, 2023 and December 31, 2022:

	March 31, 2023										December 31, 2022
	Legacy Financial Guarantee Insurance		Specialty Property & Casualty Insurance		Insurance Distribution		Corporate & Other		Consolidated		Legacy Financial Guarantee Insurance		Specialty Property & Casualty Insurance		Insurance Distribution		Corporate & Other		Consolidated
Fixed maturity securities	$	1,371	$	110	$	—	$	13	$	1,494	$	1,281	$	102	$	—	$	12	$	1,395
Fixed maturity securities - trading	29		—		—		—		29		59		—		—		—		59
Short-term	168		23		—		176		367		303		29		—		175		507
Other investments	542		—		—		16		558		552		—		—		16		568
Fixed maturity securities pledged as collateral	61		—		—		—		61		64		—		—		—		64
Total investments (1)	$	2,171	$	133	$	—	$	205	$	2,509	$	2,259	$	131	$	—	$	203	$	2,593

(1)    Includes investments denominated in non-US dollar currencies with a fair value of £263 ($324) and €40 ($43) as of March 31, 2023 and £296 ($357) and €39 ($42) as of December 31, 2022.

Ambac invests in various asset classes in its fixed maturity securities portfolio. Other investments primarily consist of diversified interests in pooled funds. Refer to Note 4. Investments to the Unaudited Consolidated Financial Statements included in Part I, Item 1 in this Form 10-Q for information about fixed maturity securities and pooled funds by asset class.

The following charts provide the ratings(1) distribution of the fixed maturity investment portfolio based on fair value at March 31, 2023 and December 31, 2022:

    

(1)Ratings are based on the lower of Moody’s or S&P ratings. If ratings are unavailable from Moody's or S&P, Fitch ratings are used. If guaranteed, rating represents the higher of the underlying or guarantor’s financial strength rating.

(2)Below investment grade and not rated bonds insured by Ambac represent 19% and 19% of the March 31, 2023, and December 31, 2022, combined fixed maturity portfolio, respectively.

| Ambac Financial Group, Inc. 43 2023 First Quarter FORM 10-Q |

Premium Receivables

Ambac's premium receivables increased to $272 at March 31, 2023, from $269 at December 31, 2022. As further discussed in Note 6. Insurance Contracts, the increase is primarily due to growth in the Specialty P&C Insurance Segment. At March 31, 2023, Legacy Financial Guarantee Insurance and Specialty P&C premiums receivables were $256 and $17, respectively.

Premium receivables by payment currency were as follows:

Currency	Premium Receivable in Payment Currency		Premium Receivable in U.S. Dollars
U.S. Dollars	$	182	$	182
British Pounds	£	61	75
Euros	€	13	15
Total			$	272

Reinsurance Recoverable on Paid and Unpaid Losses

Ambac has reinsurance in place pursuant to surplus share treaty and facultative agreements. To minimize its exposure to losses from reinsurers, Ambac (i) monitors the financial condition of its reinsurers; (ii) is entitled to receive collateral from its reinsurance counterparties under certain reinsurance contracts; and (iii) has certain cancellation rights that can be exercised in the event of rating agency downgrades of a reinsurer (among other events and circumstances). Those reinsurance counterparties that do not currently post collateral are well capitalized, highly rated, authorized capacity providers. Ambac benefited from letters of credit and collateral amounting to approximately $115 from its reinsurers at March 31, 2023.  Additionally, while legacy liabilities from the 21st Century Companies and PWIC acquisitions were fully ceded to certain reinsurers, Everspan also benefits from an unlimited, uncapped indemnity from the respective sellers to mitigate any residual risk to these reinsurers. As of March 31, 2023 and December 31, 2022, reinsurance recoverable on paid and unpaid losses were $130 and $115, respectively primarily due to growth in the Specialty P&C Insurance Segment.

Intangible Assets

Intangible assets primarily include (i) an insurance intangible asset that was established at AFG's emergence from bankruptcy (Legacy Financial Guarantee Insurance Segment) in 2013, representing the difference between the fair value and aggregate

carrying value of the financial guarantee insurance and reinsurance assets and liabilities of $261 at March 31, 2023, (ii) intangible assets established as part of acquisitions in the Insurance Distribution business of $46 at March 31, 2023, (iii) indefinite-lived intangible assets in the Specialty P&C business as part of its acquisitions of $14 at March 31, 2023.

As of March 31, 2023 and December 31, 2022, intangible assets were $321 and $326, respectively. The decline is driven by amortization and translation gains (losses) from the consolidation of Ambac's foreign subsidiary (Ambac UK).

Derivative Assets and Liabilities

The interest rate derivative portfolio is positioned to benefit from rising rates as a partial economic hedge against interest rate exposure in the Legacy Financial Guarantee insurance and investment portfolios. Derivative assets increased from $27 at December 31, 2022, to $31 as of March 31, 2023. Derivative liabilities increased from $38 at December 31, 2022, to $44 as of March 31, 2023. The increases resulted primarily from lower interest rates during the three months ended March 31, 2023.

Loss and Loss Expense Reserves and Subrogation Recoverable

Loss and loss expense reserves are based upon estimates of the ultimate aggregate losses inherent in the non-derivative portfolio for insurance policies issued to beneficiaries, excluding consolidated VIEs.

The evaluation process for determining the level of reserves is subject to certain estimates and judgments. Refer to the "Critical Accounting Policies and Estimates" and “Results of Operations” sections of Management’s Discussion and Analysis of Financial Condition and Results of Operations, in addition to Basis of Presentation and Significant Accounting Policies and Loss Reserves sections included in Note 2. Basis of Presentation and Significant Accounting Policies and Note 8. Insurance Contracts, respectively, of the Consolidated Financial Statements included in Part II, Item 8 in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022, for further information on loss and loss expenses.

The loss and loss expense reserves, net of subrogation recoverables and before reinsurance as of March 31, 2023 and December 31, 2022, were $705 and $534, respectively.

Loss and loss expense reserves are included in the Unaudited Consolidated Balance Sheets as follows:

	March 31, 2023:										December 31, 2022:
	Specialty Property and Casualty		Legacy Financial Guarantee								Specialty Property and Casualty		Legacy Financial Guarantee
			Present Value of Expected Net Cash Flows				Unearned Premium Revenue		Gross Loss and Loss Expense Reserves				Present Value of Expected Net Cash Flows				Unearned Premium Revenue		Gross Loss and Loss Expense Reserves
Balance Sheet Line Item	Gross Loss and Loss Expense Reserves		Claims and Loss Expenses		Recoveries (1)						Gross Loss and Loss Expense Reserves		Claims and Loss Expenses		Recoveries (1)
Loss and loss expense reserves	$	107	$	822	$	(48)	$	(30)	$	851	$	90	$	787	$	(44)	$	(28)	$	805
Subrogation recoverable	—		2		(148)		—		(146)		—		5		(276)		—		(271)
Totals	$	107	$	824	$	(196)	$	(30)	$	705	$	90	$	791	$	(319)	$	(28)	$	534

(1)Present value of future recoveries includes R&W subrogation recoveries of $0 and $140 at March 31, 2023 and December 31, 2022, respectively.

| Ambac Financial Group, Inc. 44 2023 First Quarter FORM 10-Q |

Legacy Financial Guarantee Insurance:

Ambac has exposure to various bond types issued in the debt capital markets. Our experience has shown that, for the majority of bond types, we have not experienced significant claims. The bond types that have experienced significant claims, including through commutations, are residential mortgage-backed securities (“RMBS”), student loan securities and public finance securities. These bond types represent 91% of our ever-to-date insurance claims recorded, with RMBS comprising 61%. The table below indicates gross par outstanding and the components of gross loss and loss expense reserves related to policies in Ambac’s gross loss and loss expense reserves at March 31, 2023 and December 31, 2022:

	March 31, 2023:										December 31, 2022:
	Gross Par Outstanding (1)		Present Value of Expected Net Cash Flows				Unearned Premium Revenue		Gross Loss and Loss Expense Reserves (1)(2)		Gross Par Outstanding (1)		Present Value of Expected Net Cash Flows				Unearned Premium Revenue		Gross Loss and Loss Expense Reserves (1)(2)
			Claims and Loss Expenses		Recoveries								Claims and Loss Expenses		Recoveries
Structured Finance	$	2,009	$	704	$	(173)	$	(10)	$	521	$	2,050	$	664	$	(296)	$	(10)	$	358
Domestic Public Finance	1,069		96		(8)		(9)		79		1,215		96		(11)		(10)		75
Other, including International finance	1,107		18		(15)		(11)		(8)		782		23		(12)		(8)		3
Loss expenses	—		6		—		—		6		—		8		—		—		8
Totals	$	4,185	$	824	$	(196)	$	(30)	$	598	$	4,047	$	791	$	(319)	$	(28)	$	444

(1)    Ceded par outstanding on policies with loss reserves and ceded loss and loss expense reserves were $450 and $34 respectively, at March 31, 2023, and $472 and $33, respectively at December 31, 2022. Recoverable ceded loss and loss expense reserves are included in Reinsurance recoverable on paid and unpaid losses on the balance sheet.

(2)    Loss reserves are included in the balance sheet as Loss and loss expense reserves or Subrogation recoverable dependent on if a policy is in a net liability or net recoverable position.

Variability of Expected Losses and Recoveries

Ambac’s management believes that the estimated future loss component of loss reserves (present value of expected net cash flows) are adequate to cover future claims presented, but there can be no assurance that the ultimate liability will not be higher than such estimates.

While our loss reserves consider our judgment regarding issuers’ financial flexibility to adapt to adverse markets, they may not adequately capture sudden, unexpected or protracted uncertainty that adversely affects market conditions. Accordingly, it is possible that our estimated loss reserves, gross of reinsurance, for financial guarantee insurance policies could be understated. We have attempted to identify possible cash flows related to losses and recoveries using more stressful assumptions than the probability-weighted outcome recorded. The possible net cash flows consider the highest stress scenario that was utilized in the development of our probability-weighted expected loss at March 31, 2023, and assumes an inability to execute any commutation transactions with issuers and/or investors. Such stress scenarios are developed based on management’s view about all possible outcomes relating to losses and recoveries. In arriving at such view, management makes considerable judgments about the possibility of various future events. Although we do not believe it is possible to have stressed outcomes in all cases, it is possible that we could have stress case outcomes in some or even many cases. See “Risk Factors” in Part I, Item 1A as well as the descriptions of "RMBS Variability," "Public Finance Variability," "Student Loan Variability," and "Other Credits, including Ambac UK, Variability" in Part II, Item 7 of the Company's 2022 Annual Report on Form 10-K, and Part II, Item1A "Risk Factors" of this Quarterly Report, for further discussion of the risks relating to future losses and recoveries that could result in more highly stressed outcomes, as well as the descriptions of "Structured Finance Variability," "Domestic

Public Finance Variability," and "Other Variability" appearing below.

The occurrence of these stressed outcomes individually or collectively would have a material adverse effect on our results of operations and financial condition and may result in materially adverse consequence for Ambac, including (without limitation) impairing the ability of AAC to honor its financial obligations, particularly its outstanding surplus note and preferred stock obligations; the initiation of rehabilitation proceedings against AAC; decreased likelihood of AAC delivering value to AFG, through dividends or otherwise; and a significant drop in the value of securities issued or insured by AFG or AAC.

Structured Finance Variability

RMBS:

Changes to assumptions that could make our reserves under-estimated include an increase in interest rates, deterioration in housing prices, poor servicing, government intervention into the functioning of the mortgage market and the general effect of a weakened economy characterized by growing unemployment and wage pressures. During the first quarter of 2023, Ambac revised the model it uses to project RMBS collateral losses considering the seasoning of our RMBS exposure and management’s view that the most relevant determinant of prospective collateral performance is borrower payment status. Individual home price appreciation/depreciation has become less critical a determinant of performance considering the general appreciation in home values over the past few years as well as the impact of loan modifications. The average estimated loan-to-values of the collateral related to insured exposures have declined to under 50% from peaks above 110%. Projected losses in our RMBS exposures and related loss reserves, may increase or decrease in the future. Possible stress case losses assume higher default rates, loss severities and lower prepayments.

| Ambac Financial Group, Inc. 45 2023 First Quarter FORM 10-Q |

Student Loans:

Changes to assumptions that could make our reserves under-estimated include, but are not limited to, increases in interest rates, default rates and loss severities on the collateral due to economic or other factors, including the economic impact from public health crises and/or natural or other catastrophic events. Such factors may include lower recoveries on defaulted loans or additional losses on collateral or trust assets, including as a result of any enforcement actions by the Consumer Finance Protection Bureau.

Structured Finance Variability:

Using the approaches described above, the possible increase in loss reserves for structured finance credits for which we have an estimate of expected loss at March 31, 2023, could be approximately $70. There can be no assurance that losses may not exceed such amounts. Due to the uncertainties related to risks associated with structured finance credits, there can be no assurance that losses may not exceed our stress case estimates.

Domestic Public Finance Variability:

Ambac’s U.S. public finance portfolio consists of municipal bonds such as general and revenue obligations and lease and tax-backed obligations of state and local government entities; however, the portfolio also includes a wide array of non-municipal types of bonds, including transactions with public and private elements, which generally finance infrastructure, housing and other public purpose facilities and interests, the largest sector of which is U.S. military housing.

It is possible our loss reserves for public finance credits may be under-estimated if issuers are faced with prolonged exposure to adverse political, judicial, economic, fiscal or socioeconomic events or trends. Additionally, our loss reserves may be under-estimated because of the local, regional or national economic impact from public health crises and/or natural or other catastrophic events.

Our experience with the city of Detroit's bankruptcy and Commonwealth of Puerto Rico's Title III proceedings as well as other municipal bankruptcies demonstrates the preferential treatment of certain creditor classes, especially the public pensions. The cost of pensions and the need to address frequently sizable unfunded or underfunded pensions is often a key driver of stress for many municipalities and their related authorities, including entities to whom we have significant exposure, such as Chicago's school district, the State of New Jersey and others. Less severe treatment of pension obligations in bankruptcy may lead to worse outcomes for traditional debt creditors.

Variability of outcomes applies to even what are generally considered more secure municipal financings, such as dedicated sales tax revenue bonds that capture sales tax revenues for debt service ahead of any amounts being deposited into the general fund of an issuer. In the case of the Puerto Rico COFINA sales tax bonds that were part of the Commonwealth of Puerto Rico's Title III proceedings, AAC and other creditors agreed to settle at a recovery rate equal to about 93% of pre-petition amounts owed on the Ambac insured senior COFINA bonds. In the COFINA case, the senior bonds still received a reduction or "haircut"

despite the existence of junior COFINA bonds, which received a recovery rate equal to about 56% of pre-petition amounts owed.

In addition, municipal entities may be more inclined to use bankruptcy to resolve their financial stresses if they believe preferred outcomes for various creditor groups can be achieved. We expect municipal bankruptcies and defaults to continue to be challenging to project given the unique political, economic, fiscal, legal, governance and public policy differences among municipalities as well as the complexity, long duration and relative infrequency of the cases themselves in forums with a scarcity of legal precedent. Moreover, issuers in Chapter 9 or similar proceedings may obtain judicial rulings and orders that impair creditors' rights or their ability to collect on amounts owed. In certain cases, judicial decisions may be contrary to AAC's expectations or understanding of the law or its rights thereunder, which may lead to worse outcomes in Chapter 9 or similar proceedings than anticipated at the outset.

Another potentially adverse development that could cause the loss reserves on our public finance credits to be underestimated is deterioration in the municipal bond market, resulting from reduced or limited access to alternative forms of credit (such as bank loans) or other exogenous factors, such as changes in tax law that could reduce certain municipal investors' appetite for tax-exempt municipal bonds or put pressure on issuers in states with high state and local taxes. These factors could deprive issuers access to funding at a level necessary to avoid defaulting on their obligations.

Following the December 6, 2022, consummation of the PRHTA POA all of Ambac’s exposures to the Commonwealth of Puerto Rico across various instrumentalities have now been restructured and AAC's exposures to Puerto Rico has been reduced to $106 of net par outstanding at March 31, 2023. However, some uncertainty remains as it relates to the extent and timing to which exposure management strategies, such as commutation and acceleration, will be executed to further reduce exposure to Puerto Rico, and, to a lesser extent, market conditions such as interest rate movements, credit spread changes on remaining plan consideration supporting AAC-insured Puerto Rico exposure in trusts, such as COFINA bonds and PRHTA '98 CVI instruments.

Material additional losses on our public finance credits caused by the aforementioned would have a material adverse effect on our results of operations and financial condition. For the public finance credits, including Puerto Rico, for which we have an estimate of expected loss at March 31, 2023, the possible increase in loss reserves could be approximately $120 and there can be no assurance that losses may not exceed our stress case estimates.

Other Credits, including International Finance Variability:

It is possible our loss reserves on other types of credits, including those insured by Ambac UK, may be under-estimated because of various risks that vary widely, including the risk that we may not be able to recover or mitigate losses through our remediation processes. For all other credits, including Ambac UK, for which we have an estimate of expected loss, the sum of all the highest stress case loss scenarios is approximately $310 greater than the

| Ambac Financial Group, Inc. 46 2023 First Quarter FORM 10-Q |

loss reserves at March 31, 2023. There can be no assurance that losses may not exceed our stress case estimates.

Long-term Debt

Long-term debt includes AAC surplus notes and the Ambac UK debt issued in connection with the Ballantyne commutation. All long-term debt relates to the Legacy Financial Guarantee segment.

The carrying value of each of these as of March 31, 2023 and December 31, 2022 is below:

	March 31, 2023		December 31, 2022
Surplus notes	$	481	$	477
Tier 2 notes	—		146
Ambac UK debt	16		16
Total Long-term Debt	$	497	$	639

The decrease in long-term debt from December 31, 2022, resulted from redemption of the Tier 2 Notes during the quarter ended March 31, 2023, partially offset by accretion on the carrying value of surplus notes and Ambac UK debt. See Note 1. Background and Business Description in the Notes to the Consolidated Financial Statements included in Part II, Item 8 in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022, for further details on the redemption of the Tier 2 Notes.

VARIABLE INTEREST ENTITIES

Please refer to Note 9. Variable Interest Entities to the Unaudited Consolidated Financial Statements included in Part I, Item 1 in this Form 10-Q and Note 2. Basis of Presentation and Significant Accounting Policies and Note 12. Variable Interest Entities to the Consolidated Financial Statements, included in Part II, Item 8 in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022, for information regarding variable interest entities.

ACCOUNTING STANDARDS

There are no new accounting standards applicable to Ambac that have been issued but not yet adopted.

U.S. INSURANCE STATUTORY BASIS FINANCIAL RESULTS ($ in million)

AFG's U.S. insurance subsidiaries prepare financial statements under accounting practices prescribed or permitted by its domiciliary state regulator (“SAP”) for determining and reporting the financial condition and results of operations of an insurance company. The National Association of Insurance Commissioners (“NAIC”) Accounting Practices and Procedures manual (“NAIC SAP”) is adopted as a component of prescribed practices by each domiciliary state. For further information, see "Ambac Assurance Statutory Basis Financial Results," in Part II, Item 7. "Management's Discussion and Analysis of Financial Condition and Results of Operations," and Note 9. Insurance Regulatory Restrictions to the Consolidated Financial Statements included in Part II, Item 8 in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022.

Ambac Assurance Corporation

AAC’s statutory policyholder surplus and qualified statutory capital (defined as the sum of policyholders surplus and mandatory contingency reserves) were $595 and $1,193 at March 31, 2023, respectively, as compared to $598 and $1,191 at December 31, 2022, respectively.  As of March 31, 2023, statutory policyholder surplus and qualified statutory capital included $519 principal balance of surplus notes outstanding and $115 liquidation preference of preferred stock outstanding. These surplus notes (in addition to related accrued interest of $438 that is not recorded under statutory basis accounting principles); preferred stock; and all other liabilities, including insurance claims are obligations that, individually and collectively, have claims on the resources of AAC that are senior to AFG's equity and therefore impede AFG's ability to realize residual value and/or receive dividends from AAC. The driver to the net decrease in policyholder surplus was the statutory net loss of $9 for the three months ended March 31, 2023 and contingency reserve contribution of $4, partially offset by an increase in fair value with undistributed earnings (losses) of pooled funds of $4 and unrealized gain on unrated securities of $2.

AAC's statutory surplus and therefore AFG's ultimate ability to realize residual value and/or dividends from AAC is sensitive to multiple factors, including: (i) loss reserve development, (ii) approval by OCI of payments on surplus notes, (iii) ongoing interest costs associated with surplus notes, (iv) swap gains and losses at AFS, the financial position of which is supported by certain guarantees and financing arrangements from AAC, (v) first time payment defaults of insured obligations, which increase statutory loss reserves, (vi) commutations of insurance policies at amounts that differ from the amount of liabilities recorded, (vii) reinsurance contract terminations at amounts that differ from net assets recorded, (viii) changes to the fair value of pooled fund and other investments carried at fair value, (ix) realized gains and losses, including losses arising from other than temporary impairments of investment securities, (x) the ultimate residual value of Ambac UK, which may be impacted by numerous factors including foreign exchange rates, and (xi) future changes to prescribed practices by the OCI.

Everspan Indemnity Insurance Company

Everspan Indemnity Insurance Company’s statutory policyholder surplus was $106.3 at March 31, 2023, as compared to $107.5 at December 31, 2022. The significant driver to the decrease was a net loss of $1.3 during the three months ended March 31, 2023.

AMBAC UK FINANCIAL RESULTS UNDER UK ACCOUNTING PRINCIPLES (£ in millions)

Ambac UK is required to prepare financial statements under FRS 102 "The Financial Reporting Standard applicable in the UK and Republic of Ireland." Ambac UK’s shareholder funds under UK GAAP were £473 at March 31, 2023, as compared to £468 at December 31, 2022. At March 31, 2023, the carrying value of cash and investments was £511, a increase from £508 at December 31, 2022. The increase in shareholders’ funds and cash and investments was primarily due to the continued receipt of premiums and investment gains, partially offset by foreign

| Ambac Financial Group, Inc. 47 2023 First Quarter FORM 10-Q |

exchange losses, general and administrative expenses and tax payments.

Ambac UK is also required to prepare financial information in accordance with the Solvency II Directive.  The basis of preparation of this information is significantly different from both US GAAP and UK GAAP. Available and eligible capital resources under Solvency II, to meet solvency capital requirements, were £338 at December 31, 2022, the most recently published position. Eligible capital resources at December 31, 2022, were in comparison to regulatory capital requirements of £213. Therefore, Ambac UK was in a surplus position in terms of compliance with applicable regulatory capital requirements by £125 at December 31, 2022.

NON-GAAP FINANCIAL MEASURES
($ in millions)

In addition to reporting the Company’s quarterly financial results in accordance with GAAP, the Company is reporting non-GAAP financial measures: EBITDA, Adjusted Net Income and Adjusted Book Value. These amounts are derived from our consolidated financial information, but are not presented in our consolidated financial statements prepared in accordance with GAAP.

We present non-GAAP supplemental financial information because we believe such information is of interest to the investment community, and that it provides greater transparency and enhanced visibility into the underlying drivers and performance of our businesses on a basis that may not be otherwise apparent on a GAAP basis. We view these non-GAAP

financial measures as important indicators when assessing and evaluating our performance on a segmented and consolidated basis and they are presented to improve the comparability of our results between periods by eliminating the impact of the items that may not be representative of our core operating performance. These non-GAAP financial measures are not substitutes for the Company’s GAAP reporting, should not be viewed in isolation and may differ from similar reporting provided by other companies, which may define non-GAAP measures differently.

Beginning January 1, 2023, Ambac replaced the non-GAAP measure Adjusted Earnings with a new non-GAAP measure Adjusted Net Income to better align with other participants in the Property & Casualty insurance industry, including insurance carriers and other peers in the insurance distribution business. We are presenting Adjusted Net Income for the current and prior periods contained within this Form 10-Q so this non-GAAP financial measure compares both periods on the same basis.

The following paragraphs define each non-GAAP financial measure. A tabular reconciliation of the non-GAAP financial measure and the most comparable GAAP financial measure is also presented below.

EBITDA — We define EBITDA as net income (loss) before interest expense, income taxes, depreciation and amortization of intangible assets. The following table reconciles net income (loss) to the non-GAAP measure, EBITDA on a consolidation and segment basis for all periods presented:

	Three Months Ended March 31, 2023										Three Months Ended March 31, 2022
	Legacy Financial Guarantee Insurance		Specialty Property & Casualty Insurance		Insurance Distribution		Corporate & Other		Consoli-dated		Legacy Financial Guarantee Insurance		Specialty Property & Casualty Insurance		Insurance Distribution		Corporate & Other		Consoli-dated
Net income (loss)	$	(36)	$	(1)	$	3	$	—	$	(33)	$	6	$	(2)	$	2	$	(3)	$	2
Adjustments:
Interest expense	16		—		—		—		16		44		—		—		—		44
Income taxes	4		—		—		—		4		—		—		—		—		—
Depreciation	—		—		—		—		—		—		—		—		—		—
Amortization of intangible assets	6		—		1		—		7		14		—		1		—		14
EBITDA (1)	$	(9)	$	(1)	$	5	$	—	$	(5)	$	65	$	(2)	$	3	$	(3)	$	62

(1)    EBITDA is prior to the impact of noncontrolling interests, and relates to subsidiaries where Ambac does not own 100% in the amounts, of $1 and $1 for the three months ended March 31, 2023 and 2022, respectively. These noncontrolling interests are primarily in the Insurance Distribution segment.

| Ambac Financial Group, Inc. 48 2023 First Quarter FORM 10-Q |

Adjusted Net Income (Loss) — We define Adjusted Net Income (Loss) as net income (loss) attributable to common stockholders adjusted to reflect the following items: (i) net investment (gains) losses, including impairments; (ii) amortization of intangible assets; (iii) litigation costs, including attorneys fees and other expenses to defend litigation against the Company, excluding loss adjustment expenses; (iv) foreign exchange (gains) losses; (v) workforce change costs, which primarily include severance and other costs related to employee terminations; and (vi) net (gain) loss on extinguishment of debt. Adjusted Net Income is also adjusted for the effect of the above items on both income taxes and noncontrolling interests. The income tax effects are determined by applying the statutory tax rate in each jurisdiction that generate these adjustments. The noncontrolling interest adjustments relate to subsidiaries where Ambac does not own 100%

The following table reconciles net income (loss) attributable to common stockholders to the non-GAAP measure, Adjusted net income:

	Three Months Ended March 31,
	2023				2022
($ in millions, except share data)	$ Amount		Per Share		$ Amount		Per Share
Net income (loss) attributable to common shareholders	$	(33)	$	(0.73)	$	2	0.04
Adjustments:
Net investment (gains) losses, including impairments	4		0.10		(10)		(0.21)
Intangible amortization	7		0.15		14		0.30
Litigation costs	9		0.19		4		0.08
Foreign exchange (gains) losses	—		(0.01)		1		0.02
Workforce change costs	1		0.02		—		—
	(13)		$	(0.28)	11		$	0.23
Income tax effects	(1)		(0.02)		—		—
Net (gains) attributable to noncontrolling interests	—		—		—		—
Adjusted net income (loss)	$	(14)	$	(0.30)	$	11	$	0.23

Adjusted Book Value. Adjusted book value is defined as Total Ambac Financial Group, Inc. stockholders’ equity as reported under GAAP, adjusted for after-tax impact of the following:

•Insurance intangible asset: Elimination of the financial guarantee insurance intangible asset that arose as a result of Ambac’s emergence from bankruptcy and the implementation of Fresh Start reporting. This adjustment ensures that all financial guarantee contracts are accounted for within adjusted book value consistent with the provisions of the Financial Services—Insurance Topic of the ASC.

•Net unearned premiums and fees in excess of expected losses: Addition of the value of the unearned premium revenue ("UPR") on financial guarantee contracts, in excess of expected losses, net of reinsurance. This non-GAAP adjustment presents the economics of UPR and expected losses for financial guarantee contracts on a consistent basis. In accordance with GAAP, stockholders’ equity reflects a reduction for expected losses only to the extent they exceed UPR. However, when expected losses are less than UPR for

a financial guarantee contract, neither expected losses nor UPR have an impact on stockholders’ equity. This non-GAAP adjustment adds UPR in excess of expected losses, net of reinsurance, to stockholders’ equity for financial guarantee contracts where expected losses are less than UPR. This adjustment is only made for financial guarantee contracts since such premiums are non-refundable.

•Net unrealized investment (gains) losses in Accumulated Other Comprehensive Income: Elimination of the unrealized gains and losses on the Company’s investments that are recorded as a component of accumulated other comprehensive income (“AOCI”), net of income taxes.

Ambac has a significant U.S. tax net operating loss (“NOL”) that is offset by a full valuation allowance in the GAAP consolidated financial statements. As a result of this, tax planning strategies and other considerations, we utilized a 0% effective tax rate for non-GAAP operating adjustments to Adjusted Book.

The following table reconciles Total Ambac Financial Group, Inc. stockholders’ equity to the non-GAAP measure Adjusted Book Value on a dollar amount and per share basis, for all periods presented:

	March 31, 2023				December 31, 2022
($ in millions, except share data)	$ Amount		Per Share		$ Amount		Per Share
Total Ambac Financial Group, Inc. stockholders’ equity	$	1,254	$	27.66	$	1,252	$	27.85
Adjustments:
Insurance intangible asset	(261)		(5.77)		(266)		(5.91)
Net unearned premiums and fees in excess of expected losses	218		4.81		214		4.76
Net unrealized investment (gains) losses in Accumulated Other Comprehensive Income	54		1.19		71		1.59
Adjusted book value	$	1,264	$	27.89	$	1,272	$	28.29

The decrease in Adjusted Book Value since December 31, 2022 was primarily attributable to Ambac's net loss (excluding earned premium previously included in Adjusted Book Value), partially offset by the positive effect foreign exchange rates.

Item 3.    Quantitative and Qualitative Disclosure About Market Risk

As of March 31, 2023, there were no material changes in the market risks that the Company is exposed to since December 31, 2022.

Item 4.     Controls and Procedures

In connection with the preparation of this first quarter Form 10-Q, an evaluation was carried out by Ambac’s management, with the participation of Ambac’s Chief Executive Officer and Chief Financial Officer, of the effectiveness of Ambac’s disclosure controls and procedures (as defined in rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934) as of the end of the period covered by this Quarterly Report on Form 10-Q. Management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving their objectives. Based on its

| Ambac Financial Group, Inc. 49 2023 First Quarter FORM 10-Q |

evaluation, Ambac’s Chief Executive Officer and Chief Financial Officer have concluded that, as of March 31, 2023, Ambac’s disclosure controls and procedures were effective.

There were no changes in the Company’s internal control over financial reporting that occurred during the quarter ended March 31, 2023, that materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

PART II.    OTHER INFORMATION

Item 1.    Legal Proceedings

Please refer to Note 14. Commitments and Contingencies of the Unaudited Consolidated Financial Statements located in Part I, Item 1 in this Form 10-Q and Note 20: Commitments and Contingencies in Part II, Item 8 in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022 for a discussion on legal proceedings against Ambac and its subsidiaries.

Item 1A.    Risk Factors

You should carefully consider the risk factors set forth in the “Risk Factors” section, Item 1A to Part I in our Annual Report on Form 10-K for the year ended December 31, 2022, which is hereby incorporated by reference. These important factors may cause our actual results to differ materially from those indicated by our forward-looking statements, including those contained in this report. Please also see the section entitled “Cautionary Statement Pursuant to the Private Securities Litigation Reform Act of 1995” in this quarterly report on Form 10-Q. There have been no material changes to the risk factors we have disclosed in the “Risk Factors” section of our aforementioned Annual Report on Form 10-K and Quarterly Report on Form 10-Q.

Item 2.    Unregistered Sales of Equity Securities and Use of Proceeds

(a)    Unregistered Sales of Equity Securities — No matters require disclosure.

(b)    Purchases of Equity Securities By the Issuer and Affiliated Purchasers

The following table summarizes Ambac's share purchases during the first quarter of 2023. When restricted stock unit awards issued by Ambac vest or settle, they become taxable compensation to employees. For certain awards, shares may be withheld to cover the employee's portion of withholding taxes.

On March 30, 2022, our Board of Directors approved a share repurchase program authorizing up to $20 million in share repurchases, with an expiration date of March 31, 2024, which may be terminated at any time. From April 1, 2022, through June 30, 2022, AFG repurchased 1,605,316 shares for $14.2 million at an average purchase price of $8.86 per share. On May 5, 2022, the Board of Directors authorized an additional $15 million share repurchase bringing the total unused authorized amount to $20.8 million.

	Jan-2023		Feb-2023		Mar-2023		First Quarter 2023
Total Shares Purchased	23,261		246,168		13,477		282,906
Average Price Paid Per Share	$	17.40	$	16.24	$	16.30	$	16.34
Total Number of Shares Purchased as Part of Publicly Announced Plan	—		—		—		—
Approximate Dollar Value of Shares That may Yet be Purchased Under the Plan (in millions)	$	21	$	21	$	21	$	21

Item 3.    Defaults Upon Senior Securities — No matters require disclosure.

Item 5.    Other Information — No matters require disclosure.

| Ambac Financial Group, Inc. 50 2023 First Quarter FORM 10-Q |

Item 6.    Exhibits

Exhibit Number	Description
Other exhibits, filed or furnished, as indicated:
10.1+	Form of 2023 Restricted Stock Unit Award Agreement between Ambac Financial Group, Inc. and Messrs. LeBlanc, Trick and Ksenak.
10.2+	Form of 2023 Restricted Stock Unit Award Agreement between Ambac Financial Group, Inc. and Messrs. Barranco, Eisman, McGinnis and Ms. Smith.
10.3+	Form of 2023 Performance Stock Unit Award Agreement between Ambac Financial Group, Inc. and Messrs. LeBlanc, Trick and Ksenak.
10.4+	Form of 2023 Performance Stock Unit Award Agreement between Ambac Financial Group, Inc. and Messrs. Barranco, Eisman, McGinnis and Ms. Smith.
31.1+	Certification of Chief Executive Officer Pursuant to Rules 13a-14(a) and 15d-14(a) Promulgated under the Securities Exchange Act of 1934, as amended.
31.2+	Certification of Chief Financial Officer Pursuant to Rules 13a-14(a) and 15d-14(a) Promulgated under the Securities Exchange Act of 1934, as amended.
32.1++	Certification of Chief Executive Officer and Chief Financial Officer Pursuant to 18 U.S.C. Section 1350 as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
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101.SCH	XBRL Taxonomy Extension Schema Document.
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document.
101.LAB	XBRL Taxonomy Extension Label Linkbase Document.
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101.DEF	XBRL Taxonomy Extension Definition Linkbase Document.
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	+ Filed herewith. ++ Furnished herewith.

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

		AMBAC FINANCIAL GROUP, INC.
Dated:	May 9, 2023	By:	/s/ DAVID TRICK
		Name:	David Trick
		Title:	Chief Financial Officer and Treasurer (Duly Authorized Officer and Principal Financial Officer)

| Ambac Financial Group, Inc. 51 2023 First Quarter FORM 10-Q |

EX-10.1

Exhibit 10.1

AMBAC FINANCIAL GROUP, INC.

RESTRICTED STOCK UNIT AGREEMENT

FOR LONG-TERM INCENTIVE COMPENSATION AWARD

Effective as of March 3, 2023 (the “Grant Date”), [[FIRSTNAME]] [[LASTNAME]] (the “Participant”) has been granted a Full Value Award under the Ambac Financial Group, Inc. 2020 Incentive Compensation Plan (the “Incentive Plan”) in the form of restricted stock units. In addition to the terms and conditions of the Incentive Plan, the Award shall be subject to the following terms and conditions (sometimes referred to as this “Agreement”).

1.Defined Terms. Capitalized terms used in this Agreement which are not otherwise defined herein shall have the meaning specified in the Incentive Plan.

2.Grant of Restricted Stock Units. Subject to the terms of this Agreement and the Incentive Plan, effective as of the Grant Date the Participant is hereby granted [[SHARESGRANTED]] restricted stock units (the “Restricted Stock Units”). This Award contains the right to dividend equivalents (“Dividend Equivalents”) as described in Section 3. Each Restricted Stock Unit shall become vested as described in Section 4 and each vested Restricted Stock Unit shall be settled in accordance with Section 6.

3.Dividend Equivalents. The Participant shall be entitled to Dividend Equivalents, which may consist of Deferred Cash Dividend Equivalents or Dividend Equivalent Units (each as defined below), in accordance with the following:

(a)If a dividend with respect to shares of Common Stock is payable in cash, then, as of the applicable dividend payment date, the Participant shall be credited with a right to receive a “Deferred Cash Dividend Equivalents” equal to (i) the cash dividend payable with respect to a share of Common Stock, multiplied by (ii) the number of Restricted Stock Units outstanding (i.e., the number of Restricted Stock Units granted hereunder less the number of such Restricted Stock Units that have settled in accordance with Section 6 below) on the applicable dividend record date.

(b)If a dividend with respect to shares of Common Stock is payable in shares of Common Stock, then, as of the dividend payment date, the Participant shall be credited with that number of “Dividend Equivalent Units” equal to (i) the number of shares of Common Stock distributed in the dividend with respect to a share of Common Stock, multiplied by (ii) the number of Restricted Stock Units outstanding on the applicable dividend record date plus the number of previously credited Dividend Equivalent Units with respect to such Restricted Stock Units, if any.

Dividend Equivalents shall be subject to the same vesting provisions as the Restricted Stock Units to which they relate and shall be settled in accordance with Section 6.

4.Vesting and Forfeiture of Awards. All Restricted Stock Units and Dividend Equivalents shall be unvested unless and until they become vested and nonforfeitable in accordance with this Section 4. Subject to the Participant’s continuing service as an employee of Ambac Financial Group, Inc. (“Ambac”), or its subsidiaries, through the applicable vesting date, and the terms and conditions of this Agreement and the Incentive Plan, the Restricted Stock

Units and associated Dividend Equivalents shall vest in three equal annual installments on March 3, 2024, March 3, 2025 and March 3, 2026. Except as provided in Section 5(a), if the Participant’s termination of employment with Ambac and its subsidiaries (the “Termination Date”) occurs for any reason prior to a vesting date, all Restricted Stock Units and associated Dividend Equivalent Units which are not vested upon the Participant’s Termination Date shall immediately expire and shall be forfeited and the Participant shall have no further rights with respect to such Restricted Stock Units or associated Dividend Equivalents.

5.Termination of Employment.

(a)Notwithstanding the provisions of Section 4, if the Participant’s Termination Date occurs by reason of (1) Disability (as defined in the Employment Agreement referenced in clause (4) of this subsection)), (2) Retirement (as defined in Section 5(b)), (3) involuntary termination by the Company other than for Cause (as defined in the Employment Agreement), (4) as a result of the Company’s failure to extend the term of the Employment Agreement between Ambac, AAC and the Participant, dated as of [Date] (the “Employment Agreement”) pursuant to Section 2 thereof, (5) termination by the Participant for Good Reason (as defined in the Employment Agreement), or (6) death, all Restricted Stock Units and associated Dividend Equivalents shall vest upon the Participant’s Termination Date. For the avoidance of doubt, if the Participant has an employment agreement which provides that this Agreement will govern if this Agreement provides for greater vesting acceleration upon a Participant’s termination of employment, then all of the provisions (including, but not limited to, terms and timing) of this Section 5(a) shall govern.

(b)For purposes of the Award evidenced by this Agreement, (i) the terms “Cause,” “Disability” and “Good Reason” shall have the meanings specified in the Employment Agreement, and (ii) a Participant’s Termination Date shall be considered to occur on account of “Retirement” if the Participant’s Termination Date occurs on or after the date on which the following conditions have been satisfied and such Termination Date does not occur for any other reason: (x) the Participant has attained age 60; (y) the Participant has provided at least ten (10) years of service to the Company; and (z) the Participant has provided at least 90 days’ prior notice of his or her Termination Date due to retirement from the Company.

6.Settlement. Subject to the terms and conditions of this Agreement, Restricted Stock Units and associated Dividend Equivalents that have become vested in accordance with Section 4 or 5 shall be settled as soon as practicable after the date on which the Restricted Stock Units and associated Dividend Equivalents vest and, in any event, by no later than March 15 of the calendar year following the calendar year in which the Restricted Stock Units and associated Dividend Equivalent Units vest. Settlement of the vested Restricted Stock Units and associated Dividend Equivalent Units shall be made in the form of shares of Common Stock with one share of Common Stock being issued in settlement of each Restricted Stock Unit and associated Dividend Equivalent Unit (any fractional share being rounded up to the next whole unit). Settlement of Earned Deferred Cash Dividend Equivalents on the vesting date of the underlying Restricted Stock Units to which they relate shall be paid in cash. Upon the settlement of any vested Restricted Stock Units and Dividend Equivalent Units, such Restricted Stock Units and Dividend Equivalent Units shall be cancelled.

7.Withholding. All Awards and payments under this Agreement are subject to withholding of all applicable taxes. Such withholding obligations shall be satisfied through amounts that the Participant is otherwise to receive upon settlement.

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8.Transferability. This Award is not transferable except as designated by the Participant by will or by the laws of descent and distribution.

9.Heirs and Successors. If any benefits deliverable to the Participant under this Agreement have not been delivered at the time of the Participant’s death, such rights shall be delivered to the Participant’s estate.

10.Administration. The authority to administer and interpret this Agreement shall be vested in the Committee, and the Committee shall have all the powers with respect to this Agreement as it has with respect to the Incentive Plan. Any interpretation of the Agreement by the Committee and any decision made by it with respect to the Agreement is final and binding on all persons.

11.Adjustment of Award. In the event of a stock dividend, stock split, reverse stock split, extraordinary cash dividend, recapitalization, reorganization, merger, consolidation, split-up, spin-off, exchange of shares, sale of assets or subsidiaries, combination, or other corporate transaction that affects the Common Stock, the Committee shall, in order to preserve the benefits or prevent the enlargement of benefits of this Award, and in the manner it determines equitable in its sole discretion, (a) adjust the number and kind of shares subject to this Award and (b) make any other adjustments that the Committee determines to be equitable (which may include, without limitation, (i) replacement of this Award with other Awards which the Committee determines have comparable value and which are based on stock of a company resulting from the transaction, and (ii) cancellation of this Award in return for cash payment of the then current value of this Award, determined as though this Award is fully vested at the time of payment).

12.Notices. Any notice required or permitted under this Agreement shall be deemed given when delivered personally, through Ambac’s stock compensation administration system or when deposited in a United States Post Office, postage prepaid, addressed, as appropriate, to the Company at its principal offices, to the Participant at the Participant’s address as last known by the Company or, in either case, such other address as one party may designate in writing to the other.

13.Governing Law. The validity, construction and effect of this Agreement shall be determined in accordance with the laws of the State of New York and applicable federal law.

14.Amendments. The Board of Directors may, at any time, amend or terminate the Incentive Plan, and the Board of Directors or the Committee may amend this Agreement, provided that no amendment or termination may, in the absence of written consent to the change by the affected Participant (or, if the Participant is not then living, the affected beneficiary), adversely affect the rights of any Participant or beneficiary under this Agreement prior to the date such amendment or termination is adopted by the Board of Directors or the Committee, as the case may be.

15.Award Not Contract of Employment. The Award does not constitute a contract of employment or continued service, and the grant of the Award will not give the Participant the right to be retained in the employ or service of the Company or any Subsidiary, nor any right or claim to any benefit under the Incentive Plan or this Agreement, unless such right or claim has specifically accrued under the terms of the Incentive Plan and this Agreement.

16.Severability. If a provision of this Agreement is held invalid by a court of competent jurisdiction, the remaining provisions will nonetheless be enforceable according to their terms. Further, if any provision is held to be overbroad as written, that provision shall be amended to narrow its application to the extent necessary to make the provision enforceable according to applicable law and enforced as amended.

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17.Incentive Plan Governs. The Award evidenced by this Agreement is granted pursuant to the Incentive Plan, and the Restricted Stock Units, Dividend Equivalent Units and this Agreement are in all respects governed by the Incentive Plan and subject to all of the terms and provisions thereof, whether such terms and provisions are incorporated in this Agreement by reference or are expressly cited.

18.Special Section 409A Rules. To the fullest extent possible, amounts and other benefits payable under the Agreement are intended to comply with or be exempt from the provisions of section 409A of the Code. This Agreement will be interpreted and administered to the extent possible in a manner consistent with the foregoing statement of intent; provided, however, that the Company does not guarantee the tax treatment of the Award. Notwithstanding any other provision of this Agreement to the contrary, if any payment or benefit hereunder is subject to section 409A of the Code, and if such payment or benefit is to be paid or provided on account of the Participant’s termination of employment (or other separation from service):

(a)and if the Participant is a specified employee (within the meaning of section 409A(a)(2)(B) of the Code) and if any such payment or benefit is required to be made or provided prior to the first day of the seventh month following the Participant’s separation from service or termination of employment, such payment or benefit shall be delayed until the first day of the seventh month following the Participant’s separation from service; and

(b)the determination as to whether the Participant has had a termination of employment (or separation from service) shall be made in accordance with the provisions of section 409A of the Code and the guidance issued thereunder without application of any alternative levels of reductions of bona fide services permitted thereunder.

4

EX-10.2

Exhibit 10.2

AMBAC FINANCIAL GROUP, INC.

RESTRICTED STOCK UNIT AGREEMENT

FOR LONG-TERM INCENTIVE COMPENSATION AWARD

Effective as of March 3, 2023 (the “Grant Date”), [[FIRSTNAME]] [[LASTNAME]] (the “Participant”) has been granted a Full Value Award under the Ambac Financial Group, Inc. 2020 Incentive Compensation Plan (the “Incentive Plan”) in the form of restricted stock units. In addition to the terms and conditions of the Incentive Plan, the Award shall be subject to the following terms and conditions (sometimes referred to as this “Agreement”).

1.Defined Terms. Capitalized terms used in this Agreement which are not otherwise defined herein shall have the meaning specified in the Incentive Plan.

2.Grant of Restricted Stock Units. Subject to the terms of this Agreement, and the Incentive Plan, effective as of the Grant Date the Participant is hereby granted [[SHARESGRANTED]] restricted stock units (the “Restricted Stock Units”). This Award contains the right to dividend equivalents (“Dividend Equivalents”) as described in Section 3. Each Restricted Stock Unit shall become vested as described in Section 4 and each vested Restricted Stock Unit shall be settled in accordance with Section 6.

3.Dividend Equivalents. The Participant shall be entitled to Dividend Equivalents, which may consist of Deferred Cash Dividend Equivalents or Dividend Equivalent Units (each as defined below), in accordance with the following:

(a)If a dividend with respect to shares of Common Stock is payable in cash, then, as of the applicable dividend payment date, the Participant shall be credited with a right to receive a “Deferred Cash Dividend Equivalents” equal to (i) the cash dividend payable with respect to a share of Common Stock, multiplied by (ii) the number of Restricted Stock Units outstanding (i.e., the number of Restricted Stock Units granted hereunder less the number of such Restricted Stock Units that have settled in accordance with Section 6 below) on the applicable dividend record date.

(b)If a dividend with respect to shares of Common Stock is payable in shares of Common Stock, then, as of the dividend payment date, the Participant shall be credited with that number of “Dividend Equivalent Units” equal to (i) the number of shares of Common Stock distributed in the dividend with respect to a share of Common Stock, multiplied by (ii) the number of Restricted Stock Units outstanding on the applicable dividend record date plus the number of previously credited Dividend Equivalent Units with respect to such Restricted Stock Units, if any.

Dividend Equivalents shall be subject to the same vesting provisions as the Restricted Stock Units to which they relate and shall be settled in accordance with Section 6.

4.Vesting and Forfeiture of Awards. All Restricted Stock Units and Dividend Equivalents shall be unvested unless and until they become vested and nonforfeitable in accordance with this Section 4. Subject to the Participant’s continuing service as an employee of Ambac Financial Group, Inc. (“Ambac”), or its subsidiaries, through the applicable vesting date, and the terms and conditions of this Agreement and the Incentive Plan, the Restricted Stock Units and associated Dividend Equivalents shall vest in three equal annual installments on March

3, 2024, March 3, 2025 and March 3, 2026. Except as provided in Section 5(a), if the Participant’s termination of employment with Ambac and its subsidiaries (the “Termination Date”) occurs for any reason prior to a vesting date, all Restricted Stock Units and associated Dividend Equivalent Units which are not vested upon the Participant’s Termination Date shall immediately expire and shall be forfeited and the Participant shall have no further rights with respect to such Restricted Stock Units or associated Dividend Equivalents.

5.Termination of Employment.

(a)Notwithstanding the provisions of Section 4, if the Participant’s Termination Date occurs by reason of death, Disability (as defined in Section 5(b)), Retirement (as defined in Section 5(b)), or involuntary termination by the Company other than for Cause (as defined in Section 5(b)), all Restricted Stock Units and associated Dividend Equivalents shall vest upon the Participant’s Termination Date.

(b)For purposes of the Award evidenced by this Agreement, (i) a Participant’s Termination Date shall be considered to occur by reason of “Disability” if his Termination Date occurs on or after the date on which he is entitled to long-term disability benefits under the Company’s long-term disability plan (or, if the Participant is not eligible for such plan, if the Participant would be entitled to benefits under such plan if he were eligible) and such Termination Date does not occur for any other reason; (ii) a Participant’s Termination Date shall be considered to occur by reason of “Cause” if the Participant’s Termination Date occurs by reason of termination by the Company and is on account of (A) any act or omission by the Participant resulting in, or intending to result in, personal gain at the expense of the Company; (B) the improper disclosure by the Participant of proprietary or confidential information of the Company; or (C) misconduct by the Participant, including, but not limited to, fraud, intentional violation of, or negligent disregard for, the rules and procedures of the Company (including the code of business conduct), theft, violent acts or threats of violence, or possession of controlled substances on the property of the Company; provided, however, that the meaning of “Cause” shall be (1) expanded to include any additional grounds for cause-based termination specified in any contract, policy or plan applicable to the Participant or (2) superseded to the extent expressly provided in such contract, policy or plan; and (iii) a Participant’s Termination Date shall be considered to occur on account of “Retirement” if the Participant’s Termination Date occurs on or after the date on which the following conditions have been satisfied and such Termination Date does not occur for any other reason: (x) the Participant has attained age 60; (y) the Participant has provided at least ten (10) years of service to the Company; and (z) the Participant has provided at least 90 days’ prior notice of his or her Termination Date due to retirement from the Company.

6.Settlement. Subject to the terms and conditions of this Agreement, Restricted Stock Units and associated Dividend Equivalents that have become vested in accordance with Section 4 or 5 shall be settled as soon as practicable after the date on which the Restricted Stock Units and associated Dividend Equivalents vest and, in any event, by no later than March 15 of the calendar year following the calendar year in which the Restricted Stock Units and associated Dividend Equivalent Units vest. Settlement of the vested Restricted Stock Units and associated Dividend Equivalent Units shall be made in the form of shares of Common Stock with one share of Common Stock being issued in settlement of each Restricted Stock Unit and associated Dividend Equivalent Unit (any fractional share being rounded up to the next whole unit). Settlement of Earned Deferred Cash Dividend Equivalents on the vesting date of the underlying Restricted Stock Units to which they relate shall be paid in cash. Upon the settlement of any vested Restricted Stock Units and Dividend Equivalent Units, such Restricted Stock Units and Dividend Equivalent Units shall be cancelled.

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7.Withholding. All Awards and payments under this Agreement are subject to withholding of all applicable taxes. Such withholding obligations shall be satisfied through amounts that the Participant is otherwise to receive upon settlement.

8.Transferability. This Award is not transferable except as designated by the Participant by will or by the laws of descent and distribution.

9.Heirs and Successors. If any benefits deliverable to the Participant under this Agreement have not been delivered at the time of the Participant’s death, such rights shall be delivered to the Participant’s estate.

10.Administration. The authority to administer and interpret this Agreement shall be vested in the Committee, and the Committee shall have all the powers with respect to this Agreement as it has with respect to the Incentive Plan. Any interpretation of the Agreement by the Committee and any decision made by it with respect to the Agreement is final and binding on all persons.

11.Adjustment of Award. In the event of a stock dividend, stock split, reverse stock split, extraordinary cash dividend, recapitalization, reorganization, merger, consolidation, split-up, spin-off, exchange of shares, sale of assets or subsidiaries, combination, or other corporate transaction that affects the Common Stock, the Committee shall, in order to preserve the benefits or prevent the enlargement of benefits of this Award, and in the manner it determines equitable in its sole discretion, (a) adjust the number and kind of shares subject to this Award and (b) make any other adjustments that the Committee determines to be equitable (which may include, without limitation, (i) replacement of this Award with other Awards which the Committee determines have comparable value and which are based on stock of a company resulting from the transaction, and (ii) cancellation of this Award in return for cash payment of the then current value of this Award, determined as though this Award is fully vested at the time of payment).

12.Notices. Any notice required or permitted under this Agreement shall be deemed given when delivered personally, through Ambac’s stock compensation administration system or when deposited in a United States Post Office, postage prepaid, addressed, as appropriate, to the Company at its principal offices, to the Participant at the Participant’s address as last known by the Company or, in either case, such other address as one party may designate in writing to the other.

13.Governing Law. The validity, construction and effect of this Agreement shall be determined in accordance with the laws of the State of New York and applicable federal law.

14.Amendments. The Board of Directors may, at any time, amend or terminate the Incentive Plan, and the Board of Directors or the Committee may amend this Agreement, provided that no amendment or termination may, in the absence of written consent to the change by the affected Participant (or, if the Participant is not then living, the affected beneficiary), adversely affect the rights of any Participant or beneficiary under this Agreement prior to the date such amendment or termination is adopted by the Board of Directors or the Committee, as the case may be.

15.Award Not Contract of Employment. The Award does not constitute a contract of employment or continued service, and the grant of the Award will not give the Participant the right to be retained in the employ or service of the Company or any Subsidiary, nor any right or claim to any benefit under the Incentive Plan or this Agreement, unless such right or claim has specifically accrued under the terms of the Incentive Plan and this Agreement.

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16.Severability. If a provision of this Agreement is held invalid by a court of competent jurisdiction, the remaining provisions will nonetheless be enforceable according to their terms. Further, if any provision is held to be overbroad as written, that provision shall be amended to narrow its application to the extent necessary to make the provision enforceable according to applicable law and enforced as amended.

17.Incentive Plan Governs. The Award evidenced by this Agreement is granted pursuant to the Incentive Plan, and the Restricted Stock Units, Dividend Equivalent Units and this Agreement are in all respects governed by the Incentive Plan and subject to all of the terms and provisions thereof, whether such terms and provisions are incorporated in this Agreement by reference or are expressly cited.

18.Special Section 409A Rules. To the fullest extent possible, amounts and other benefits payable under the Agreement are intended to comply with or be exempt from the provisions of section 409A of the Code. This Agreement will be interpreted and administered to the extent possible in a manner consistent with the foregoing statement of intent; provided, however, that the Company does not guarantee the tax treatment of the Award. Notwithstanding any other provision of this Agreement to the contrary, if any payment or benefit hereunder is subject to section 409A of the Code, and if such payment or benefit is to be paid or provided on account of the Participant’s termination of employment (or other separation from service):

(a)and if the Participant is a specified employee (within the meaning of section 409A(a)(2)(B) of the Code) and if any such payment or benefit is required to be made or provided prior to the first day of the seventh month following the Participant’s separation from service or termination of employment, such payment or benefit shall be delayed until the first day of the seventh month following the Participant’s separation from service; and

(b)the determination as to whether the Participant has had a termination of employment (or separation from service) shall be made in accordance with the provisions of section 409A of the Code and the guidance issued thereunder without application of any alternative levels of reductions of bona fide services permitted thereunder.

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EX-10.3

AMBAC FINANCIAL GROUP, INC.

PERFORMANCE STOCK UNIT AGREEMENT

FOR LONG-TERM INCENTIVE COMPENSATION AWARD

(Employees with Employment Agreements)

Effective as of [Date], 2023 (the “Grant Date”), [Name] (the “Participant”) has been granted an Award under the Ambac Financial Group, Inc. 2020 Incentive Compensation Plan (the “Incentive Plan”). This Agreement evidences the Award, which shall consist of a Full Value Award in the form of performance stock units (“Performance Stock Units”). In addition to the terms and conditions of the Incentive Plan and the Award shall be subject to the following terms and conditions (sometimes referred to as this “Agreement”).

1.Defined Terms. Capitalized terms used in this Agreement which are not otherwise defined herein shall have the meaning specified in the Incentive Plan.

2.Grant of Performance Stock Units. Subject to the terms of this Agreement, and the Incentive Plan, effective as of the Grant Date the Participant is hereby granted [Number] Performance Stock Units (the “Target Performance Units”). This Award contains the right to dividend equivalents (“Dividend Equivalents”) with respect to Earned Performance Units (as defined in Section 3(a)) as described in Section 4. Each Performance Stock Unit awarded hereunder shall become earned and vested as described in Section 3 and each Earned Performance Unit (and associated Earned Dividend Equivalents thereon as described in Section 4) shall be settled in accordance with Section 5.

3.Earning, Vesting and Forfeiture of Performance Stock Units. The Performance Stock Units shall become earned and vested in accordance with the following:

(a)All Performance Stock Units shall be unearned and unvested unless and until they become earned and vested and nonforfeitable in accordance with this Section 3. The Participant shall have the ability to earn between 0% and 240% of the Target Performance Units, as determined by the Compensation Committee, based on the continuing employment of the Participant during the period beginning on January 1, 2023 and ending on the December 31, 2025 (the “Performance Period”) and satisfaction of the Performance Goals set forth in Exhibit A hereto (which is incorporated into and forms part of this Agreement). Any Performance Stock Units granted pursuant to this Agreement that become earned in accordance with this Agreement shall be referred to herein as “Earned Performance Units”. Except as provided in Section 3(b), if the Participant’s termination of employment or service with the Company (the “Termination Date”) occurs for any reason prior to the last day of the Performance Period, the Participant’s right to all Performance Stock Units (and any associated Dividend Equivalents) awarded or credited to the Participant pursuant to this Agreement shall expire and be forfeited immediately and the Participant shall have no further rights with respect to any of the Performance Stock Units (or associated Dividend Equivalents). The Earned Performance Units (and any associated Earned Dividend Equivalents) shall be settled in accordance with Section 5 hereof.

(b)Notwithstanding the provisions of Section 3(a), (x) if the Participant’s Termination Date occurs prior to the last day of the Performance Period by reason of (1) Disability (as defined in the Employment Agreement referenced in clause (4) of this subsection)), (2) Retirement (as defined in Section 3(c)), (3) involuntary termination by the Company other than for Cause (as defined in the Employment Agreement), (4) as a result of the Company’s failure to extend the term of the Employment Agreement between Ambac, AAC and the Participant, dated as of [Date] (the “Employment Agreement”) pursuant to Section 2 thereof, or (5) termination by the Participant for Good Reason (as defined in the Employment Agreement), the Participant shall be entitled to

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receive the number of Earned Performance Units (and any associated Earned Dividend Equivalents) that the Participant would have been entitled to receive had the Termination Date not occurred prior to the end of the Performance Period based on actual satisfaction of the Performance Goals, and (y) if the Participant’s Termination Date occurs prior to the last day of the Performance Period by reason of death, the beneficiaries of Participant shall be entitled to receive the number of Earned Performance Units (and any associated Earned Dividend Equivalents) that the Participant would have been entitled to receive had the Termination Date not occurred prior to the end of the Performance Period at a 100% overall payout multiple regardless of the outcome of the Performance Goals, Total Shareholder Return or Relative Total Shareholder Return (which shall be equal to the number of Target Performance Units plus any Earned Dividend Equivalents). For the avoidance of doubt, if the Participant has an employment agreement which provides that this Agreement will govern if this Agreement provides for greater vesting acceleration upon a Participant’s termination of employment, then all of the provisions (including, but not limited to, terms and timing) of this Section 3(b) shall govern.

(c)For purposes of the Award evidenced by this Agreement, (i) the terms “Cause,” “Disability” and “Good Reason” shall have the meanings specified in the Employment Agreement, and (ii) the Participant’s Termination Date shall be considered to occur on account of “Retirement” if the Participant’s Termination Date occurs on or after the date on which the following conditions have been satisfied and such Termination Date does not occur for any other reason: (x) the Participant has attained age 60; (y) the Participant has provided at least ten (10) years of service to the Company; and (z) the Participant has provided at least 90 days’ prior notice of his or her Termination Date due to retirement from the Company.

4.Dividend Equivalents. The Participant shall be credited with Dividend Equivalents, which may consist of Deferred Cash Dividend Equivalents or Dividend Equivalent Units (each as defined below), as follows:

(a)If, during the Performance Period, a dividend with respect to shares of Common Stock is paid in cash, then as of the dividend payment date, the Participant shall be credited with a right to receive a “Deferred Cash Dividend Equivalent” equal to (i) the cash dividend paid with respect to a share of Common Stock, multiplied by (ii) 240% of the Target Performance Units (the “Maximum Performance Units”).

(b)If, during the Performance Period, a dividend with respect to shares of Common Stock is paid in shares of Common Stock, then as of the dividend payment date the Participant shall be credited with that number of “Dividend Equivalent Units” equal to (i) the number of shares of Common Stock distributed in the dividend with respect to a share of Common Stock, multiplied by (ii)(A) the number of Maximum Performance Units plus (B) the number of previously credited Dividend Equivalent Units with respect to such Performance Stock Units, if any, rounded down to the nearest whole number.

Dividend Equivalents shall be earned on the same basis and to the same extent that the Performance Stock Units to which they relate become Earned Performance Units. Therefore, the Participant shall only earn Dividend Equivalents with respect to Earned Performance Units and, to the extent that any Dividend Equivalents are credited to the Participant pursuant to this Section 4 and are not earned in accordance with this Agreement, they shall be forfeited and the Participant shall have no further rights with respect thereto under this Agreement or otherwise. Any Dividend Equivalents credited to the Participant pursuant to this Section 4 that become earned in accordance with this Agreement are sometimes referred to as “Earned Dividend Equivalents.”

5.Settlement. Subject to the terms and conditions of this Agreement, the Earned Performance Units (and associated Earned Dividend Equivalents) shall be settled as soon as practically possible, but not later than March 15 following the end of the Performance Period (the “Settlement Date”) subject to Special Section 409A Rules in Section 18; provided that in the case of death of a Participant, the Settlement Date shall be the Participant’s Termination Date. Settlement of the Earned

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Performance Units and Earned Dividend Equivalent Units on the Settlement Date shall be made in the form of shares of Common Stock with one share of Common Stock being issued in settlement of each Earned Performance Unit and each Earned Dividend Equivalent Unit, with any fractional shares of Common Stock being rounded up to the nearest whole number. Settlement of Earned Deferred Cash Dividend Equivalents on the Settlement Date shall be paid in cash. Upon the settlement of any Earned Performance Unit and associated Earned Dividend Equivalent Units, such Earned Performance Unit and Earned Dividend Equivalent Units shall be cancelled. Any Performance Stock Units and associated Dividend Equivalents outstanding as of the last day of the Performance Period that do not become Earned Performance Units and associated Earned Dividend Equivalents shall be automatically cancelled as of the last day of the Performance Period.

6.Withholding. The Award and settlement thereof are subject to withholding of all applicable taxes. Such withholding obligations shall be satisfied through amounts that the Participant is otherwise to receive upon settlement.

7.Transferability. The Award is not transferable except as designated by the Participant by will or by the laws of descent and distribution.

8.Heirs and Successors. If any benefits deliverable to the Participant under this Agreement have not been delivered at the time of the Participant’s death, such rights shall be delivered to the Participant’s estate.

9.Administration. The authority to administer and interpret this Agreement shall be vested in the Compensation Committee, and the Compensation Committee shall have all the powers with respect to this Agreement as it has with respect to the Incentive Plan. Any interpretation of the Agreement by the Compensation Committee and any decision made by it with respect to the Agreement is final and binding on all persons.

10.Adjustment of Award. In the event of a stock dividend, stock split, reverse stock split, extraordinary cash dividend, recapitalization, reorganization, merger, consolidation, split-up, spin-off, exchange of shares, sale of assets or subsidiaries, combination, or other corporate transaction that affects the Common Stock, the Compensation Committee shall, in order to preserve the benefits or prevent the enlargement of benefits of this Award, and in the manner it determines equitable in its sole discretion, (a) adjust the number and kind of shares subject to this Award and (b) make any other adjustments that the Compensation Committee determines to be equitable (which may include, without limitation, (i) replacement of this Award with other Awards which the Compensation Committee determines have comparable value and which are based on stock of a company resulting from the transaction, and (ii) cancellation of this Award in return for cash payment of the then current value of this Award, determined as though this Award is fully vested at the time of payment).

11.Notices. Any notice required or permitted under this Agreement shall be deemed given when delivered personally, through Ambac’s stock compensation administration system or when deposited in a United States Post Office, postage prepaid, addressed, as appropriate, to Ambac at its principal offices, to the Participant at the Participant’s address as last known by the Company or, in either case, such other address as one party may designate in writing to the other.

12.Governing Law. The validity, construction and effect of this Agreement shall be determined in accordance with the laws of the State of New York and applicable federal law.

13.Amendments. The Board of Directors may, at any time, amend or terminate the Incentive Plan, and the Board of Directors or the Compensation Committee may amend this Agreement, provided that no amendment or termination may, in the absence of written consent to the change by the affected Participant (or, if the Participant is not then living, the affected beneficiary), adversely affect the rights of any Participant or beneficiary under this Agreement prior to the date such amendment or termination is adopted by the Board of Directors or the Compensation Committee, as the case may be.

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14.Award Not Contract of Employment. The Award does not constitute a contract of employment or continued service, and the grant of the Award will not give the Participant the right to be retained in the employ or service of the Company, nor any right or claim to any benefit under the Incentive Plan, or this Agreement, unless such right or claim has specifically accrued under the terms of the Incentive Plan and this Agreement.

15.Severability. If a provision of this Agreement is held invalid by a court of competent jurisdiction, the remaining provisions will nonetheless be enforceable according to their terms. Further, if any provision is held to be overbroad as written, that provision shall be amended to narrow its application to the extent necessary to make the provision enforceable according to applicable law and enforced as amended.

16.Incentive Plan Governs. The Award evidenced by this Agreement is granted pursuant to the Incentive Plan, and the Performance Stock Units and this Agreement are in all respects governed by the Incentive Plan and subject to all of the terms and provisions thereof, whether such terms and provisions are incorporated in this Agreement by reference or are expressly cited.

17.Special Section 409A Rules. To the fullest extent possible, amounts and other benefits payable under the Agreement are intended to comply with or be exempt from the provisions of section 409A of the Code. This Agreement will be interpreted and administered to the extent possible in a manner consistent with the foregoing statement of intent; provided, however, that the Company does not guarantee the tax treatment of the Award. Notwithstanding any other provision of this Agreement to the contrary, if any payment or benefit hereunder is subject to section 409A of the Code, and if such payment or benefit is to be paid or provided on account of the Participant’s termination of employment (or other separation from service):

(a)and if the Participant is a specified employee (within the meaning of section 409A(a)(2)(B) of the Code) and if any such payment or benefit is required to be made or provided prior to the first day of the seventh month following the Participant’s separation from service or termination of employment, such payment or benefit shall be delayed until the first day of the seventh month following the Participant’s separation from service; and

(b)the determination as to whether the Participant has had a termination of employment (or separation from service) shall be made in accordance with the provisions of section 409A of the Code and the guidance issued thereunder without application of any alternative levels of reductions of bona fide services permitted thereunder.

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EXHIBIT A

The Award evidenced by the Agreement shall be earned based on the satisfaction of the Performance Goals described in this Exhibit A (the “Performance Goals”) determined based on the rating calculated pursuant to the following table, subject to the RTSR modifier discussed below:

		Cirrata Group		Everspan
Rating	Payout Multiple	Cumulative Gross Written Premium ($mm)	Cumulative EBITDA ($mm)	Cumulative Gross Written Premium ($mm)	Cumulative EBITDA ($mm)	WLACC Outstanding ($bn)
1	2.00	890.0	46.0	1,250.0	30.0	3.9
2	1.00	759.0	35.0	1,140.0	25.0	4.6
3	0.00	667.0	31.5	975.0	15.5	5.3

Capitalized terms shall have the meanings set forth below.

With respect to the Performance Goals, the applicable rating shall be determined as follows: (i) 21.5% shall be based on the Cumulative Cirrata EBITDA; (ii) 21.5% shall be based on the Cumulative Everspan EBITDA; (iii) 21.5% shall be based on WLACC Outstanding at December 31, 2025; (iv) 17.75% shall be based on the Cumulative Gross Written Premium at Cirrata; and (v) 17.75% shall be based on the Cumulative Gross Written Premium at Everspan. Linear interpolation between payout multiples of Cumulative Cirrata EBITDA, Cumulative Everspan EBITDA, WLACC Outstanding, Cumulative Gross Written Premium at Cirrata, and Cumulative Gross Written Premium Everspan, as applicable, will result in a proportionate number of the Target Performance Units (and associated Dividend Equivalents) becoming Earned Performance Units (and Earned Dividend Equivalents).

All metrics noted in this table shall be neutral to the effects of changes to US GAAP.

Upon a sale of Ambac Assurance Corporation, Ambac Assurance UK Limited (“AUK”), or other disposition which has been structured as an ART Transaction, management shall receive the full benefit of the reduction to WLACC Outstanding from such transaction.

All determinations as to whether the Performance Goals have been satisfied will be determined by the Compensation Committee.

Notwithstanding anything in this Exhibit A to the contrary, the number of Target Performance Units (and associated Dividend Equivalents) that become Earned Performance Units (and Earned Dividend Equivalents) based on the level of achievement of the metrics set forth in table above shall be adjusted, either upwards or downwards, based on AFG’s RTSR Percentile Ranking for the Performance Period, in accordance with the table below, as determined by the Compensation Committee. For the avoidance of doubt, in no event shall the Participant earn more than 240% of the Target Performance Units after the RTSR modifier is applied.

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RTSR Percentile Ranking	RTSR Modifier
75th percentile or above	120% of overall payout multiple
Between 25th and 75th percentile	100% of overall payout multiple
25th percentile or below	80% of overall payout multiple

For purposes of this Exhibit A, the following definitions shall apply:

AAC: Ambac Assurance Corporation.

AFG: Ambac Financial Group, Inc.

ART Transactions:Alternative Risk Transfer transactions executed by the Company that reduce/eliminate portfolio risk, including by way of proportional reinsurance (e.g. quota share) or other alternative hedging or risk transfer strategies (e.g. excess of loss reinsurance) the impact of which has been approved by the Committee for purposes of reducing WLACC Outstanding. For purposes of this definition, (i) the impact of an ART Transaction whereby net par is not reduced but a portion of the risk related to a WLACC is defeased or reduced for some or all of the remaining life of the insured exposure shall count towards calculating the reduction in WLACC Outstanding and (ii) the measure of benefit for WLACC Outstanding for an ART Transaction will be calculated as follows (a) the net par balance of the portion of the WLACC exposure affected by the ART Transaction multiplied by (b) the quotient of the ART Transaction coverage period and the remaining expected life of the exposure.  To the extent an ART Transaction is executed that does not conform to the aforementioned example management will propose an alternative calculation to the Compensation Committee to measure the WLACC Outstanding reduction. 

Cumulative Everspan EBITDA: 100% of Everspan Group’s earnings before interest, taxes, depreciation and amortization (calculated in accordance with US GAAP as in effect at beginning of the Performance Period) through the Performance Period. Cumulative Everspan EBITDA shall be adjusted to exclude the impact of any other costs as determined in the sole discretion of the Board.

Cumulative Cirrata EBITDA: 100% of Cirrata Group’s earnings before interest, taxes, depreciation and amortization (calculated in accordance with US GAAP as in effect at beginning of the Performance Period) through the Performance Period. Cumulative Cirrata EBITDA shall be adjusted to exclude the impact of any other costs as determined in the sole discretion of the Board.

Cirrata Group: Includes Xchange Benefits, LLC, All Trans Risk Solutions, Capacity Marine Corporation, PenPoint Specialty Insurance, LLC and their majority owned subsidiaries at the beginning of the Performance Period and excludes any future acquisitions. (collectively, “Cirrata”).

Gross Written Premiums: The contractually determined amount charged to a policyholder for the effective period of the contract based on the coverage provided by the term of an insurance contract.

•Everspan Cumulative Gross Written Premium: includes (i) Everspan Group direct premiums written (including premiums sourced from affiliated MGAs, MGUs and brokers (i.e. Cirrata)) and assumed premium from non-affiliates and (ii) the Gross Written Premium equivalent for programs with minimum fronting fees calculated as follows: minimum fronting fee/fronting fee rate (e.g. 5%) less amounts already included in section (i) for the program.

•Cirrata Cumulative Gross Written Premium: includes all premiums placed by Cirrata with any insurance carrier.

Everspan Group: Everspan Holdings, LLC and its majority owned subsidiaries at the beginning of the performance period and excludes future acquisitions (collectively, “Everspan”).

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Performance Period: period in which the performance metrics are measured will be from 1/1/2023 to 12/31/2025.

Peer Group: The entities set forth on Exhibit B hereto. However, in the event that, prior to the end of the Performance Period, there occurs: (i) a merger, acquisition or business combination transaction of a Peer Group member with or by another Peer Group member, only the surviving entity shall remain a member of the Peer Group; (ii) a merger, acquisition or business combination of a Peer Group member with an entity that is not a Peer Group member, or the acquisition or business combination transaction by or with a Peer Group member, where such Peer Group member is the surviving entity and remains publicly traded, such Peer Group member shall remain a member of the Peer Group; (iii) a merger or acquisition or business combination transaction of a Peer Group member by or with an entity that is not a Peer Group member or a “going private” transaction involving a Peer Group member where such Peer Group member is not the surviving entity or is otherwise no longer publicly traded, such Peer Group member shall no longer be a member of the Peer Group; (iv) a stock distribution from a Peer Group member consisting of the shares of a new publicly traded company (a “spin-off”), such Peer Group member shall remain a member of the Peer Group, such distribution shall be treated as a dividend from such Peer Group member based on the closing price of the shares of the spun-off company on its first day of trading and the performance of the shares of the spun-off company shall not thereafter be tracked for purposes of calculating Total Shareholder Return; or (v) a bankruptcy or liquidation of a Peer Group member, such Peer Group member will remain a member of the Peer Group and the Total Shareholder Return of such Peer Group member shall equal -100%.

Relative Total Shareholder Return, or RTSR: The percentile rank of the Company’s Total Shareholder Return as compared to the Total Shareholder Returns of all members of the Peer Group, ranked in descending order (including the Company), at the end of the Performance Period.

Total Shareholder Return: With respect to each of the Common Stock and the common stock of each of the members of the Peer Group, a rate of return reflecting stock price appreciation, plus the reinvestment of dividends in additional shares of stock, from the beginning of the Performance Period through the end of the Performance Period. For purposes of calculating Total Shareholder Return for each of AFG and the members of the Peer Group, (i) the beginning stock price will be based on the average of the twenty (20) trading days immediately prior to the first day of the Performance Period on the principal stock exchange on which the stock is then listed or admitted to trading and the ending stock price will be based on the average of the last twenty (20) trading days of the Performance Period on the principal stock exchange on which the stock is then listed or admitted to trading and (ii) reinvestment of dividends shall be assumed to be reinvested on the ex-dividend date using the closing stock price on the ex-dividend date.

WLACC Outstanding: The remaining net par outstanding at December 31, 2025, inclusive of the impact of any ART Transactions executed by the Company during the Performance Period, for watch list and adversely classified credits as identified at the beginning of the Performance Period (“WLACC”) by AFG and its subsidiaries, including AAC and AUK. For purposes of this award, WLACC amounts will exclude new credits added during the Performance Period, including credits added through reinsurance recaptures.

For non-U.S. exposures, the currency exchange rates to be used shall be those beginning on the first day of the Performance Period.

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EXHIBIT B

PEER GROUP

Assured Guaranty Ltd. (AGO)

MBIA Inc. (MBI)

Argo Group International Holdings, Ltd. (ARGO)

Enstar Group Limited (ESGR)

Hanover Group, Inc. (THG)

HCI Group, Inc. (HCI)

Horace Mann Educators Corporation (HMN)

PRA Group, Inc. (PRAA)

ProAssurance Corporation (PRA)

RLI Corp. (RLI)

Selective Insurance Group, Inc. (SIGI)

SiriusPoint Ltd. (SPNT)

White Mountains Insurance Ltd. (WTM)

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EX-10.4

Exhibit 10.4

AMBAC FINANCIAL GROUP, INC.

PERFORMANCE STOCK UNIT AGREEMENT

FOR LONG-TERM INCENTIVE COMPENSATION AWARD

(Employees without Employment Agreements)

Effective as of [Date], 2023 (the “Grant Date”), [Name] (the “Participant”) has been granted an Award under the Ambac Financial Group, Inc. 2020 Incentive Compensation Plan (the “Incentive Plan”). This Agreement evidences the Award, which shall consist of a Full Value Award in the form of performance stock units (“Performance Stock Units”). In addition to the terms and conditions of the Incentive Plan and the Award shall be subject to the following terms and conditions (sometimes referred to as this “Agreement”).

1.Defined Terms. Capitalized terms used in this Agreement which are not otherwise defined herein shall have the meaning specified in the Incentive Plan.

2.Grant of Performance Stock Units. Subject to the terms of this Agreement, and the Incentive Plan, effective as of the Grant Date the Participant is hereby granted [Number] Performance Stock Units (the “Target Performance Units”). This Award contains the right to dividend equivalents (“Dividend Equivalents”) with respect to Earned Performance Units (as defined in Section 3(a)) as described in Section 4. Each Performance Stock Unit awarded hereunder shall become earned and vested as described in Section 3 and each Earned Performance Unit (and associated Earned Dividend Equivalents thereon as described in Section 4) shall be settled in accordance with Section 5.

3.Earning, Vesting and Forfeiture of Performance Stock Units. The Performance Stock Units shall become earned and vested in accordance with the following:

(a)All Performance Stock Units shall be unearned and unvested unless and until they become earned and vested and nonforfeitable in accordance with this Section 3. The Participant shall have the ability to earn between 0% and 240% of the Target Performance Units, as determined by the Compensation Committee, based on the continuing employment of the Participant during the period beginning on January 1, 2023 and ending on the December 31, 2025 (the “Performance Period”) and satisfaction of the Performance Goals set forth in Exhibit A hereto (which is incorporated into and forms part of this Agreement). Any Performance Stock Units granted pursuant to this Agreement that become earned in accordance with this Agreement shall be referred to herein as “Earned Performance Units”. Except as provided in Section 3(b), if the Participant’s termination of employment or service with the Company (the “Termination Date”) occurs for any reason prior to the last day of the Performance Period, the Participant’s right to all Performance Stock Units (and any associated Dividend Equivalents) awarded or credited to the Participant pursuant to this Agreement shall expire and be forfeited immediately and the Participant shall have no further rights with respect to any of the Performance Stock Units (or associated Dividend Equivalents). The Earned Performance Units (and any associated Earned Dividend Equivalents) shall be settled in accordance with Section 5 hereof.

(b)Notwithstanding the provisions of Section 3(a), (x) if the Participant’s Termination Date occurs prior to the last day of the Performance Period by reason of Disability (as defined in Section 3(c)), Retirement (as defined in Section 3(c)), or involuntary termination by the Company other than for Cause (as defined in Section 3(c)), the Participant shall be entitled to receive the number of Earned Performance Units (and any associated Earned Dividend Equivalents) that the Participant would have been entitled to receive had the Termination Date not occurred prior to the end of the

Performance Period based on actual satisfaction of the Performance Goals, and (y) if the Participant’s Termination Date occurs prior to the last day of the Performance Period by reason of death, the beneficiaries of Participant shall be entitled to receive the number of Earned Performance Units (and any associated Earned Dividend Equivalents) that the Participant would have been entitled to receive had the Termination Date not occurred prior to the end of the Performance Period at a 100% overall payout multiple regardless of the outcome of the Performance Goals, Total Shareholder Return or Relative Total Shareholder Return (which shall be equal to the number of Target Performance Units plus any Earned Dividend Equivalents).

(c)For purposes of the Award evidenced by this Agreement, (i) a Participant’s Termination Date shall be considered to occur by reason of “Disability” if his Termination Date occurs on or after the date on which he is entitled to long-term disability benefits under the Company’s long-term disability plan (or, if the Participant is not eligible for such plan, if the Participant would be entitled to benefits under such plan if he were eligible) and such Termination Date does not occur for any other reason; (ii) the Participant’s Termination Date shall be considered to occur by reason of “Cause” if the Participant’s Termination Date occurs by reason of termination by the Company and is on account of (A) any act or omission by the Participant resulting in, or intending to result in, personal gain at the expense of the Company; (B) the improper disclosure by the Participant of proprietary or confidential information of the Company; or (C) misconduct by the Participant, including, but not limited to, fraud, intentional violation of, or negligent disregard for, the rules and procedures of the Company (including the code of business conduct), theft, violent acts or threats of violence, or possession of controlled substances on the property of the Company; provided, however, that the meaning of “Cause” shall be (1) expanded to include any additional grounds for cause-based termination specified in any contract, policy or plan applicable to the Participant or (2) superseded to the extent expressly provided in such contract, policy or plan; and (iii) the Participant’s Termination Date shall be considered to occur on account of “Retirement” if the Participant’s Termination Date occurs on or after the date on which the following conditions have been satisfied and such Termination Date does not occur for any other reason: (x) the Participant has attained age 60; (y) the Participant has provided at least ten (10) years of service to the Company; and (z) the Participant has provided at least 90 days’ prior notice of his or her Termination Date due to retirement from the Company.

4.Dividend Equivalents. The Participant shall be credited with Dividend Equivalents, which may consist of Deferred Cash Dividend Equivalents or Dividend Equivalent Units (each as defined below), as follows:

(a)If, during the Performance Period, a dividend with respect to shares of Common Stock is paid in cash, then as of the dividend payment date, the Participant shall be credited with a right to receive a “Deferred Cash Dividend Equivalent” equal to (i) the cash dividend paid with respect to a share of Common Stock, multiplied by (ii) 240% of the Target Performance Units (the “Maximum Performance Units”).

(b)If, during the Performance Period, a dividend with respect to shares of Common Stock is paid in shares of Common Stock, then as of the dividend payment date the Participant shall be credited with that number of “Dividend Equivalent Units” equal to (i) the number of shares of Common Stock distributed in the dividend with respect to a share of Common Stock, multiplied by (ii)(A) the number of Maximum Performance Units plus (B) the number of previously credited Dividend Equivalent Units with respect to such Performance Stock Units, if any, rounded down to the nearest whole number.

Dividend Equivalents shall be earned on the same basis and to the same extent that the Performance Stock Units to which they relate become Earned Performance Units. Therefore, the Participant shall only earn Dividend Equivalents with respect to Earned Performance Units and, to the extent that any Dividend Equivalents are credited to the Participant pursuant to this Section 4 and are not earned in

2

accordance with this Agreement, they shall be forfeited and the Participant shall have no further rights with respect thereto under this Agreement or otherwise. Any Dividend Equivalents credited to the Participant pursuant to this Section 4 that become earned in accordance with this Agreement are sometimes referred to as “Earned Dividend Equivalents.”

5.Settlement. Subject to the terms and conditions of this Agreement, the Earned Performance Units (and associated Earned Dividend Equivalents) shall be settled as soon as practically possible, but not later than March 15 following the end of the Performance Period (the “Settlement Date”) subject to Special Section 409A Rules in Section 18; provided that in the case of death of a Participant, the Settlement Date shall be the Participant’s Termination Date. Settlement of the Earned Performance Units and Earned Dividend Equivalent Units on the Settlement Date shall be made in the form of shares of Common Stock with one share of Common Stock being issued in settlement of each Earned Performance Unit and each Earned Dividend Equivalent Unit, with any fractional shares of Common Stock being rounded up to the nearest whole number. Settlement of Earned Deferred Cash Dividend Equivalents on the Settlement Date shall be paid in cash. Upon the settlement of any Earned Performance Unit and associated Earned Dividend Equivalent Units, such Earned Performance Unit and Earned Dividend Equivalent Units shall be cancelled. Any Performance Stock Units and associated Dividend Equivalents outstanding as of the last day of the Performance Period that do not become Earned Performance Units and associated Earned Dividend Equivalents shall be automatically cancelled as of the last day of the Performance Period.

6.Withholding. The Award and settlement thereof are subject to withholding of all applicable taxes. Such withholding obligations shall be satisfied through amounts that the Participant is otherwise to receive upon settlement.

7.Transferability. The Award is not transferable except as designated by the Participant by will or by the laws of descent and distribution.

8.Heirs and Successors. If any benefits deliverable to the Participant under this Agreement have not been delivered at the time of the Participant’s death, such rights shall be delivered to the Participant’s estate.

9.Administration. The authority to administer and interpret this Agreement shall be vested in the Compensation Committee, and the Compensation Committee shall have all the powers with respect to this Agreement as it has with respect to the Incentive Plan. Any interpretation of the Agreement by the Compensation Committee and any decision made by it with respect to the Agreement is final and binding on all persons.

10.Adjustment of Award. In the event of a stock dividend, stock split, reverse stock split, extraordinary cash dividend, recapitalization, reorganization, merger, consolidation, split-up, spin-off, exchange of shares, sale of assets or subsidiaries, combination, or other corporate transaction that affects the Common Stock, the Compensation Committee shall, in order to preserve the benefits or prevent the enlargement of benefits of this Award, and in the manner it determines equitable in its sole discretion, (a) adjust the number and kind of shares subject to this Award and (b) make any other adjustments that the Compensation Committee determines to be equitable (which may include, without limitation, (i) replacement of this Award with other Awards which the Compensation Committee determines have comparable value and which are based on stock of a company resulting from the transaction, and (ii) cancellation of this Award in return for cash payment of the then current value of this Award, determined as though this Award is fully vested at the time of payment).

11.Notices. Any notice required or permitted under this Agreement shall be deemed given when delivered personally, through Ambac’s stock compensation administration system or when deposited in a United States Post Office, postage prepaid, addressed, as appropriate, to Ambac at its principal offices, to the Participant at the Participant’s address as last known by the Company or, in either case, such other address as one party may designate in writing to the other.

3

12.Governing Law. The validity, construction and effect of this Agreement shall be determined in accordance with the laws of the State of New York and applicable federal law.

13.Amendments. The Board of Directors may, at any time, amend or terminate the Incentive Plan, and the Board of Directors or the Compensation Committee may amend this Agreement, provided that no amendment or termination may, in the absence of written consent to the change by the affected Participant (or, if the Participant is not then living, the affected beneficiary), adversely affect the rights of any Participant or beneficiary under this Agreement prior to the date such amendment or termination is adopted by the Board of Directors or the Compensation Committee, as the case may be.

14.Award Not Contract of Employment. The Award does not constitute a contract of employment or continued service, and the grant of the Award will not give the Participant the right to be retained in the employ or service of the Company, nor any right or claim to any benefit under the Incentive Plan, or this Agreement, unless such right or claim has specifically accrued under the terms of the Incentive Plan and this Agreement.

15.Severability. If a provision of this Agreement is held invalid by a court of competent jurisdiction, the remaining provisions will nonetheless be enforceable according to their terms. Further, if any provision is held to be overbroad as written, that provision shall be amended to narrow its application to the extent necessary to make the provision enforceable according to applicable law and enforced as amended.

16.Incentive Plan Governs. The Award evidenced by this Agreement is granted pursuant to the Incentive Plan, and the Performance Stock Units and this Agreement are in all respects governed by the Incentive Plan and subject to all of the terms and provisions thereof, whether such terms and provisions are incorporated in this Agreement by reference or are expressly cited.

17.Special Section 409A Rules. To the fullest extent possible, amounts and other benefits payable under the Agreement are intended to comply with or be exempt from the provisions of section 409A of the Code. This Agreement will be interpreted and administered to the extent possible in a manner consistent with the foregoing statement of intent; provided, however, that the Company does not guarantee the tax treatment of the Award. Notwithstanding any other provision of this Agreement to the contrary, if any payment or benefit hereunder is subject to section 409A of the Code, and if such payment or benefit is to be paid or provided on account of the Participant’s termination of employment (or other separation from service):

(a)and if the Participant is a specified employee (within the meaning of section 409A(a)(2)(B) of the Code) and if any such payment or benefit is required to be made or provided prior to the first day of the seventh month following the Participant’s separation from service or termination of employment, such payment or benefit shall be delayed until the first day of the seventh month following the Participant’s separation from service; and

(b)the determination as to whether the Participant has had a termination of employment (or separation from service) shall be made in accordance with the provisions of section 409A of the Code and the guidance issued thereunder without application of any alternative levels of reductions of bona fide services permitted thereunder.

4

5

EXHIBIT A

The Award evidenced by the Agreement shall be earned based on the satisfaction of the Performance Goals described in this Exhibit A (the “Performance Goals”) determined based on the rating calculated pursuant to the following table, subject to the RTSR modifier discussed below:

		Cirrata Group		Everspan
Rating	Payout Multiple	Cumulative Gross Written Premium ($mm)	Cumulative EBITDA ($mm)	Cumulative Gross Written Premium ($mm)	Cumulative EBITDA ($mm)	WLACC Outstanding ($bn)
1	2.00	890.0	46.0	1,250.0	30.0	3.9
2	1.00	759.0	35.0	1,140.0	25.0	4.6
3	0.00	667.0	31.5	975.0	15.5	5.3

Capitalized terms shall have the meanings set forth below.

With respect to the Performance Goals, the applicable rating shall be determined as follows: (i) 21.5% shall be based on the Cumulative Cirrata EBITDA; (ii) 21.5% shall be based on the Cumulative Everspan EBITDA; (iii) 21.5% shall be based on WLACC Outstanding at December 31, 2025; (iv) 17.75% shall be based on the Cumulative Gross Written Premium at Cirrata; and (v) 17.75% shall be based on the Cumulative Gross Written Premium at Everspan. Linear interpolation between payout multiples of Cumulative Cirrata EBITDA, Cumulative Everspan EBITDA, WLACC Outstanding, Cumulative Gross Written Premium at Cirrata, and Cumulative Gross Written Premium Everspan, as applicable, will result in a proportionate number of the Target Performance Units (and associated Dividend Equivalents) becoming Earned Performance Units (and Earned Dividend Equivalents).

All metrics noted in this table shall be neutral to the effects of changes to US GAAP.

Upon a sale of Ambac Assurance Corporation, Ambac Assurance UK Limited (“AUK”), or other disposition which has been structured as an ART Transaction, management shall receive the full benefit of the reduction to WLACC Outstanding from such transaction.

All determinations as to whether the Performance Goals have been satisfied will be determined by the Compensation Committee.

Notwithstanding anything in this Exhibit A to the contrary, the number of Target Performance Units (and associated Dividend Equivalents) that become Earned Performance Units (and Earned Dividend Equivalents) based on the level of achievement of the metrics set forth in table above shall be adjusted, either upwards or downwards, based on AFG’s RTSR Percentile Ranking for the Performance Period, in accordance with the table below, as determined by the Compensation Committee. For the avoidance of doubt, in no event shall the Participant earn more than 240% of the Target Performance Units after the RTSR modifier is applied.

6

RTSR Percentile Ranking	RTSR Modifier
75th percentile or above	120% of overall payout multiple
Between 25th and 75th percentile	100% of overall payout multiple
25th percentile or below	80% of overall payout multiple

For purposes of this Exhibit A, the following definitions shall apply:

AAC: Ambac Assurance Corporation.

AFG: Ambac Financial Group, Inc.

ART Transactions:Alternative Risk Transfer transactions executed by the Company that reduce/eliminate portfolio risk, including by way of proportional reinsurance (e.g. quota share) or other alternative hedging or risk transfer strategies (e.g. excess of loss reinsurance) the impact of which has been approved by the Committee for purposes of reducing WLACC Outstanding. For purposes of this definition, (i) the impact of an ART Transaction whereby net par is not reduced but a portion of the risk related to a WLACC is defeased or reduced for some or all of the remaining life of the insured exposure shall count towards calculating the reduction in WLACC Outstanding and (ii) the measure of benefit for WLACC Outstanding for an ART Transaction will be calculated as follows (a) the net par balance of the portion of the WLACC exposure affected by the ART Transaction multiplied by (b) the quotient of the ART Transaction coverage period and the remaining expected life of the exposure.  To the extent an ART Transaction is executed that does not conform to the aforementioned example management will propose an alternative calculation to the Compensation Committee to measure the WLACC Outstanding reduction. 

Cumulative Everspan EBITDA: 100% of Everspan Group’s earnings before interest, taxes, depreciation and amortization (calculated in accordance with US GAAP as in effect at beginning of the Performance Period) through the Performance Period. Cumulative Everspan EBITDA shall be adjusted to exclude the impact of any other costs as determined in the sole discretion of the Board.

Cumulative Cirrata EBITDA: 100% of Cirrata Group’s earnings before interest, taxes, depreciation and amortization (calculated in accordance with US GAAP as in effect at beginning of the Performance Period) through the Performance Period. Cumulative Cirrata EBITDA shall be adjusted to exclude the impact of any other costs as determined in the sole discretion of the Board.

Cirrata Group: Includes Xchange Benefits, LLC, All Trans Risk Solutions, Capacity Marine Corporation, PenPoint Specialty Insurance, LLC and their majority owned subsidiaries at the beginning of the Performance Period and excludes any future acquisitions. (collectively, “Cirrata”).

Gross Written Premiums: The contractually determined amount charged to a policyholder for the effective period of the contract based on the coverage provided by the term of an insurance contract.

•Everspan Cumulative Gross Written Premium: includes (i) Everspan Group direct premiums written (including premiums sourced from affiliated MGAs, MGUs and brokers (i.e. Cirrata)) and assumed premium from non-affiliates and (ii) the Gross Written Premium equivalent for programs with minimum fronting fees calculated as follows: minimum fronting fee/fronting fee rate (e.g. 5%) less amounts already included in section (i) for the program.

•Cirrata Cumulative Gross Written Premium: includes all premiums placed by Cirrata with any insurance carrier.

Everspan Group: Everspan Holdings, LLC and its majority owned subsidiaries at the beginning of the performance period and excludes future acquisitions (collectively, “Everspan”).

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Performance Period: period in which the performance metrics are measured will be from 1/1/2023 to 12/31/2025.

Peer Group: The entities set forth on Exhibit B hereto. However, in the event that, prior to the end of the Performance Period, there occurs: (i) a merger, acquisition or business combination transaction of a Peer Group member with or by another Peer Group member, only the surviving entity shall remain a member of the Peer Group; (ii) a merger, acquisition or business combination of a Peer Group member with an entity that is not a Peer Group member, or the acquisition or business combination transaction by or with a Peer Group member, where such Peer Group member is the surviving entity and remains publicly traded, such Peer Group member shall remain a member of the Peer Group; (iii) a merger or acquisition or business combination transaction of a Peer Group member by or with an entity that is not a Peer Group member or a “going private” transaction involving a Peer Group member where such Peer Group member is not the surviving entity or is otherwise no longer publicly traded, such Peer Group member shall no longer be a member of the Peer Group; (iv) a stock distribution from a Peer Group member consisting of the shares of a new publicly traded company (a “spin-off”), such Peer Group member shall remain a member of the Peer Group, such distribution shall be treated as a dividend from such Peer Group member based on the closing price of the shares of the spun-off company on its first day of trading and the performance of the shares of the spun-off company shall not thereafter be tracked for purposes of calculating Total Shareholder Return; or (v) a bankruptcy or liquidation of a Peer Group member, such Peer Group member will remain a member of the Peer Group and the Total Shareholder Return of such Peer Group member shall equal -100%.

Relative Total Shareholder Return, or RTSR: The percentile rank of the Company’s Total Shareholder Return as compared to the Total Shareholder Returns of all members of the Peer Group, ranked in descending order (including the Company), at the end of the Performance Period.

Total Shareholder Return: With respect to each of the Common Stock and the common stock of each of the members of the Peer Group, a rate of return reflecting stock price appreciation, plus the reinvestment of dividends in additional shares of stock, from the beginning of the Performance Period through the end of the Performance Period. For purposes of calculating Total Shareholder Return for each of AFG and the members of the Peer Group, (i) the beginning stock price will be based on the average of the twenty (20) trading days immediately prior to the first day of the Performance Period on the principal stock exchange on which the stock is then listed or admitted to trading and the ending stock price will be based on the average of the last twenty (20) trading days of the Performance Period on the principal stock exchange on which the stock is then listed or admitted to trading and (ii) reinvestment of dividends shall be assumed to be reinvested on the ex-dividend date using the closing stock price on the ex-dividend date.

WLACC Outstanding: The remaining net par outstanding at December 31, 2025, inclusive of the impact of any ART Transactions executed by the Company during the Performance Period, for watch list and adversely classified credits as identified at the beginning of the Performance Period (“WLACC”) by AFG and its subsidiaries, including AAC and AUK. For purposes of this award, WLACC amounts will exclude new credits added during the Performance Period, including credits added through reinsurance recaptures.

For non-U.S. exposures, the currency exchange rates to be used shall be those beginning on the first day of the Performance Period.

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EXHIBIT B

PEER GROUP

Assured Guaranty Ltd. (AGO)

MBIA Inc. (MBI)

Argo Group International Holdings, Ltd. (ARGO)

Enstar Group Limited (ESGR)

Hanover Group, Inc. (THG)

HCI Group, Inc. (HCI)

Horace Mann Educators Corporation (HMN)

PRA Group, Inc. (PRAA)

ProAssurance Corporation (PRA)

RLI Corp. (RLI)

Selective Insurance Group, Inc. (SIGI)

SiriusPoint Ltd. (SPNT)

White Mountains Insurance Ltd. (WTM)

9

EX-31.1

EXHIBIT 31.1

Ambac Financial Group, Inc.

Certifications

I, Claude LeBlanc, certify that:

1.    I have reviewed this Quarterly Report on Form 10-Q of Ambac Financial Group, Inc. (the "registrant");

2.    Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.    Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.    The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a—15(e) and 15d—15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.    Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.    Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.    Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.    Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.    The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors:

a.    All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.    Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated:	May 9, 2023	By:	/s/ Claude LeBlanc
			Claude LeBlanc President and Chief Executive Officer

EX-31.2

EXHIBIT 31.2

Ambac Financial Group, Inc.

Certifications

I, David Trick, certify that:

1.    I have reviewed this Quarterly Report on Form 10-Q of Ambac Financial Group, Inc. (the"registrant");

2.    Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.    Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.    The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a—15(e) and 15d—15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.    Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.    Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.    Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.    Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.    The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors:

a.    All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.    Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated:	May 9, 2023	By:	/s/ David Trick
			David Trick Chief Financial Officer and Treasurer

EX-32.1

EXHIBIT 32

Certification of Chief Executive Officer and Chief Financial Officer

Pursuant to 18 U.S.C. Section 1350,

as Adopted Pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report of Ambac Financial Group, Inc. (the “Company”) on Form 10-Q for the period ended March 31, 2023, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), we, Claude LeBlanc, Chief Executive Officer of the Company, and David Trick, Chief Financial Officer of the Company, hereby certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of their knowledge:

(1)    The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)    The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

By:	/s/ Claude LeBlanc
Name:	Claude LeBlanc
Title:	President and Chief Executive Officer

		By:	/s/ David Trick
		Name:	David Trick
		Title:	Chief Financial Officer and Treasurer
Dated:	May 9, 2023

XML

Document and Entity Information - $ / shares	3 Months Ended
	Mar. 31, 2023	May 05, 2023	Apr. 30, 2013
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2023
Entity Ex Transition Period	false
Entity File Number	1-10777
Entity Registrant Name	AMBAC FINANCIAL GROUP, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	13-3621676
Entity Address, Address Line One	One World Trade Center
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10007
City Area Code	(212)
Local Phone Number	658-7470
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Bankruptcy Proceedings, Reporting Current	true
Entity Common Stock, Shares Outstanding		45,321,870
Common Stock, Par or Stated Value Per Share	$ 0.01		$ 0.01
Amendment Flag	false
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q1
Entity Central Index Key	0000874501
Current Fiscal Year End Date	--12-31
Common Stock [Member]
Entity Information [Line Items]
Title of 12(b) Security	Common stock par value $0.01 per share
Trading Symbol	AMBC
Security Exchange Name	NYSE
Warrants [Member]
Entity Information [Line Items]
Title of 12(b) Security	Warrants
Trading Symbol	AMBC WS
Security Exchange Name	NYSE

XML

Consolidated Balance Sheets - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Assets:
Fixed maturity securities, at fair value	$ 1,923
Total investments (net of allowance for credit losses of $1 and $0)	2,509	$ 2,593
Restricted Cash	10	14
Premiums Receivable, Net	272	269
Premium Receivable, Allowance for Credit Loss	5	5
Reinsurance Recoverables, Including Reinsurance Premium Paid	130	115
Deferred ceded premium	135	124
Subrogation recoverable	146	271
Derivative assets	31	27
Intangible assets	321	326
Goodwill	61	61	$ 46
Other assets	85	84
Total assets	8,219	7,973
Liabilities:
Unearned premiums	389	372
Loss and loss expense reserves	851	805
Ceded premiums payable	38	39
Long-term debt	497	639
Accrued interest payable	438	427
Derivative Liability	44	38
Other liabilities	141	163
Total liabilities	6,892	6,647
Redeemable Noncontrolling Interest, Equity, Carrying Amount	20	20	18
Liabilities	6,892	6,647
Stockholders’ equity:
Preferred stock, par value $0.01 per share; 20,000,000 shares authorized; issued and outstanding shares—none	0	0
Common Stock, Value, Issued	0	0
Additional paid-in capital	278	274
Accumulated other comprehensive income	(217)	(253)	58
Retained earnings	1,206	1,245
Treasury stock, shares at cost: 0 and 8,202	(14)	(15)
Total Ambac Financial Group, Inc. stockholders’ equity	1,254	1,252
Noncontrolling interest	53	53
Total stockholders’ equity	1,307	1,305	1,098
Total liabilities and stockholders’ equity	8,219	7,973
Debt Securities, Available-for-sale, Allowance for Credit Loss	1	0
Debt Securities, Available-for-sale, Amortized Cost	1,983	2,041
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	304	61	$ 23
Deferred Policy Acquisition Cost	4	3
Capitalized Contract Cost, Net	$ 6	$ 5
Treasury Stock, Common, Shares	1,337,274	1,685,233
Afg [Member]
Stockholders’ equity:
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 48	$ 44
Xchange
Liabilities:
Redeemable Noncontrolling Interest, Equity, Redemption Value	20
Redeemable Noncontrolling Interest, Equity, Carrying Amount		20
Short-term Investments [Member]
Assets:
Fixed maturity securities, at fair value	367	507
Stockholders’ equity:
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale, Amortized Cost	367	507
Variable Interest Entity, Primary Beneficiary [Member]
Assets:
Fixed maturity securities, at fair value	2,119	1,967
Restricted Cash	256	17
Derivative assets	243	239
Other assets	1	2
Total assets	4,476	4,054
Liabilities:
Long-term debt	3,060	3,107
Derivative Liability	1,174	1,048
Other Sundry Liabilities, Current	255
Other liabilities	1	5
Total liabilities	4,489	4,160
Liabilities	4,489	4,160
Stockholders’ equity:
Financing Receivable, after Allowance for Credit Loss	1,856	1,829
Gross Investment Income, Operating	2
Derivative and other assets	244	241
Fixed Income Securities [Member]
Assets:
Fixed maturity securities, at fair value	1,494	1,395
Stockholders’ equity:
Debt Securities, Available-for-sale, Allowance for Credit Loss	1	0
Debt Securities, Available-for-sale, Amortized Cost	1,554	1,469
Debt Securities, Available-for-Sale, Excluding Accrued Interest	1,494	1,395
Short-term Investments [Member]
Assets:
Fixed maturity securities, at fair value	367	507
Stockholders’ equity:
Gross Investment Income, Operating	6
Other Investments [Member]
Stockholders’ equity:
Other Investment Not Readily Marketable, Fair Value	557	568
Gross Investment Income, Operating	13
Fixed Income Securities, Trading
Stockholders’ equity:
Gross Investment Income, Operating	0
Debt Securities, Available-for-Sale, Excluding Accrued Interest	29	59
Collateral Pledged [Member] | Fixed Income Securities [Member]
Assets:
Fixed maturity securities, at fair value	61	64
Collateral Pledged [Member] | Fixed Income Securities [Member] | Short-term Investments [Member]
Assets:
Fixed maturity securities, at fair value	61	64
Stockholders’ equity:
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale, Amortized Cost	61	64
Collateral Pledged [Member] | Short-term Investments
Stockholders’ equity:
Debt Securities, Available-for-sale, Amortized Cost	61	64
Collateralized Securities | Short-term Investments [Member]
Assets:
Fixed maturity securities, at fair value	$ 61	$ 64

XML

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale, Amortized Cost	$ 1,983	$ 2,041
Debt Securities, Available-for-sale, Allowance for Credit Loss	1	0
Premium Receivable, Allowance for Credit Loss	$ 5	$ 5
Preferred stock, par value	$ 0.01
Preferred stock, shares authorized	20,000,000
Preferred Stock, Shares Issued	0
Common stock, par value	$ 0.01
Common stock, shares authorized	130,000,000
Common stock, shares issued	46,659,019	46,658,990
Common stock, shares outstanding	45,321,745
Equity investments in pooled funds [Member]
Other Investment Not Readily Marketable, Fair Value	$ 545	$ 556
Variable Interest Entity, Primary Beneficiary [Member]
Long-term debt	$ 2,869	$ 2,788

XML

Consolidated Statements of Total Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Net investment income:
Interest and Dividend Income, Securities, Operating, Available-for-Sale	$ 21	$ 14
Net investment income	34	5
Realized Investment Gains (Losses)	(4)	10
Change in fair value of credit derivatives:
Derivative, Gain (Loss) on Derivative, Net	(4)	57
Insurance Commissions and Fees	14	9
Other Operating Income (Expense), Net	3	2
Income (loss) on variable interest entities	(1)	22
Total revenues and other income	58	119
Policyholder Benefits and Claims Incurred, Net	18	24
Expenses:
Intangible amortization	7	14
General and Administrative Expense	36	29
Interest expense	16	44
Total expenses	86	116
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	(29)	3
Provision for income taxes	4	0
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest	(1)	0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(33)	2
Net income (loss) attributable to common stockholders	(33)	2
Other comprehensive income (loss), after tax
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(33)	2
Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax	17	(105)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	16	(23)
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Unrealized Gain (Loss) Arising During Period, after Tax	0	0
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	3	0
Total other comprehensive income (loss), net of income tax	36	(127)
Total comprehensive income (loss), net of income tax	3	(125)
Less: comprehensive (gain) loss attributable to the noncontrolling interest
Total comprehensive income (loss) attributable to common stockholders	3	(125)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest	$ (1)	$ 0
Earnings Per Share, Basic	$ (0.73)	$ 0.04
Earnings Per Share, Diluted	$ (0.73)	$ 0.04
Weighted Average Number of Shares Outstanding, Basic	45,564,276	46,731,459
Weighted Average Number of Shares Outstanding, Diluted	45,564,276	47,359,731
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Unrealized Gain (Loss) Arising During Period, Tax	$ 0	$ 0
Gain (loss) on foreign currency translation, taxes	0	0
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Plan Amendments, Tax Effect	0	0
Premiums Earned, Net	14	15
Unrealized (loss) gain on securities, taxes	1	(2)
Contractually Specified Servicing Fee, Late Fee, and Ancillary Fee Earned in Exchange for Servicing Financial Asset	1	0
Deferred Policy Acquisition Costs, Amortization Expense	1	0
General and Administrative Expense	36	29
Insurance Commissions	$ 8	$ 5

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Consolidated Statements of Total Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Unrealized (loss) gain on securities, taxes	$ 1	$ (2)
Gain (loss) on foreign currency translation, taxes	0	0
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Unrealized Gain (Loss) Arising During Period, Tax	0	0
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Plan Amendments, Tax Effect	$ 0	$ 0

XML

Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions	Total	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Noncontrolling Interest [Member]	Treasury Stock, Common
Beginning balance at Dec. 31, 2021	$ 1,098	$ 726	$ 58	$ 0	$ 0	$ 257	$ 60	$ (3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income (loss)	(125)	2	(127)				0
Stock-based compensation	5					5
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	(3)	(5)	0	0	0	0	0	1
Ending balance at Mar. 31, 2022	974	723	(70)	0	0	262	60	(2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income (loss)	(125)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(127)
Noncontrolling Interest, Change in Redemption Value	0
Beginning balance at Dec. 31, 2022	1,305	1,245	(253)	0	0	274	53	(15)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income (loss)	3
Stock-based compensation	3					3
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	(5)	(6)	0	0	0	0	0	2
Ending balance at Mar. 31, 2023	1,307	1,206	(217)	$ 0	$ 0	$ 278	53	$ (14)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income (loss)	3
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	36	$ (33)	$ 36				$ 0
Noncontrolling Interest, Change in Redemption Value	$ 0

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Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities:
Net income attributable to common shareholders	$ (33)	$ 2
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest	(1)	0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Total	(33)	2
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation	0	0
Amortization of bond premium and discount	(3)	(3)
Share-based compensation	3	5
Unearned premiums, net	6	(11)
Losses and loss expenses, net	143	(6)
Ceded premiums payable	(1)	7
Premium receivables	(3)	6
Accrued interest payable	(37)	24
Amortization of Intangible Assets	7	14
Net investment gains (losses), including impairments	4	(10)
Variable interest entity activities	1	(22)
Derivative assets and liabilities	14	(46)
Other, net	(25)	48
Net Cash Provided by (Used in) Operating Activities, Total	77	9
Proceeds from Sale of Debt Securities, Available-for-Sale	63	141
Net Cash Provided by (Used in) Investing Activities [Abstract]
Proceeds from matured bonds	6	20
Purchases of bonds	(104)	(33)
Proceeds from sales of other invested assets	41	45
Purchases of other invested assets	(14)	(25)
Change in short-term investments	146	(114)
Change in cash collateral	(16)	54
Proceeds from paydowns of consolidated VIE assets	57	47
Other, net	8	0
Net cash provided by investing activities	441	136
Net Cash Provided by (Used in) Financing Activities [Abstract]
Tax payments related to shares withheld for share-based compensation plans	(5)	(3)
Proceeds from (Payments to) Noncontrolling Interests	0	0
Payments of consolidated VIE liabilities	(174)	(49)
Net cash used in financing activities	(276)	(52)
Effect of foreign exchange on cash, cash equivalents and restricted cash	0	0
Net cash flow	243	93
Cash, cash equivalents, and restricted cash at beginning of period	61	23
Cash, cash equivalents, and restricted cash at end of period	304	116
Change in cash collateral	(16)	54
Tier 2 Notes
Net Cash Provided by (Used in) Financing Activities [Abstract]
Repayments of Secured Debt	(97)	0
Repayments of Secured Debt	97	0
Variable Interest Entity, Primary Beneficiary [Member]
Net Cash Provided by (Used in) Investing Activities [Abstract]
Change in cash collateral	254	0
Change in cash collateral	$ 254	$ 0

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Background and Business Description

3 Months Ended

Mar. 31, 2023

Accounting Policies [Abstract]

Background and Business Description

1.    BACKGROUND AND BUSINESS DESCRIPTION

The following description provides an update of Note 1. Background and Business Description in the Notes to the Consolidated Financial Statements included in Part II, Item 8 in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022, and should be read in conjunction with the complete descriptions provided in the Form 10-K. Capitalized terms used, but not defined herein, and in the other footnotes to the Consolidated Financial Statements included in this Quarterly Report on Form 10-Q shall have the meanings ascribed thereto in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022.

Ambac Financial Group, Inc. (“AFG”), headquartered in New York City, is a financial services holding company incorporated in the state of Delaware on April 29, 1991. References to “Ambac,” the “Company,” “we,” “our,” and “us” are to AFG and its subsidiaries, as the context requires. Ambac's business operations include:

•Legacy Financial Guarantee Insurance — Ambac's financial guarantee business includes the activities of Ambac Assurance Corporation ("AAC") and its wholly owned subsidiaries, including Ambac Assurance UK Limited (“Ambac UK”) and Ambac Financial Services LLC ("AFS"). Both AAC and Ambac UK (the "Legacy Financial Guarantee Companies") have financial guarantee insurance portfolios that have been in runoff since 2008. AFS uses derivatives to hedge interest rate risk in AAC's insurance and investment portfolios.

•Specialty Property & Casualty Insurance — Ambac's Specialty Property & Casualty Insurance program business. Currently includes five admitted carriers and an excess and surplus lines (“E&S” or “nonadmitted”) insurer (collectively, “Everspan”). Everspan carriers have an AM Best rating of 'A-' (Excellent).

•Insurance Distribution — Ambac's specialty property and casualty ("P&C") insurance distribution business, which could include Managing General Agents and Underwriters (collectively "MGAs"), insurance brokers, and other distribution businesses; currently includes Xchange Benefits, LLC (“Xchange”) a P&C MGA specializing in accident and health products; All Trans Risk Solutions, LLC ("All Trans"), an MGA specializing in commercial automobile insurance for specific "for-hire" auto clauses; and Capacity Marine Corporation ("Capacity Marine"), a wholesale and retail brokerage and reinsurance intermediary specializing in marine and international risk.

The Company reports these three business operations as segments; see Note 3. Segment Information for further information.

Strategies to Enhance Shareholder Value

The Company's primary goal is to maximize long-term shareholder value through the execution of targeted strategies for its (i) Specialty Property and Casualty Insurance and Insurance Distribution businesses and (ii) Legacy Financial Guarantee Insurance business.

Specialty Property and Casualty Insurance and Insurance Distribution strategic priorities include:

•Growing a Specialty Property and Casualty Insurance business which generates underwriting profits and an attractive return on capital from a diversified portfolio of commercial and personal liability risks accessed through program administrators.

•Building an Insurance Distribution business based on deep domain knowledge in specialty and niche classes of risk which generate attractive margins at scale. This will be achieved through acquisitions, new business “de-novo” formation and incubation, and product expansion supported by a centralized technology led shared services offering.

•Making opportunistic investments that are strategic to both the Specialty Property and Casualty Insurance and Insurance Distribution businesses.

Legacy Financial Guarantee Insurance strategic priorities include:

•Actively managing, de-risking and mitigating insured portfolio risk, and pursuing recovery of previously paid losses.

•Improving operating efficiency and optimizing our asset and liability profile.

•Exploring strategic options to further maximize value for AFG.

The execution of Ambac’s strategy to increase the value of its investment in AAC is subject to the restrictions set forth in the Settlement Agreement, dated as of June 7, 2010, as amended (the "Settlement Agreement"), by and among AAC, Ambac Credit Products LLC ("ACP"), AFG and certain counterparties to credit default swaps with ACP that were guaranteed by AAC, as well as the Stipulation and Order among the Office of the Commissioner of Insurance for the State of Wisconsin (“OCI”), AFG and AAC that became effective on February 12, 2018, as amended (the “Stipulation and Order”), each of which requires OCI and, under certain circumstances, holders of surplus notes, to approve certain actions taken by or in respect of AAC. In exercising its approval rights, OCI will act for the benefit of policyholders, and will not take into account the interests of AFG.

The Settlement Agreement limits certain activities of AAC and its subsidiaries, such as issuing indebtedness; engaging in mergers and similar transactions; disposing of assets; making restricted payments; creating or permitting liens; engaging in transactions with affiliates; modifying or creating tax sharing agreements; and taking certain actions with respect to surplus notes (among other restrictions and limitations). The Settlement Agreement includes certain allowances with respect to these activities and generally requires the approval of OCI and, in some cases, holders of

surplus notes issued pursuant to the Settlement Agreement, for consents, waivers or amendments.

The Stipulation and Order includes affirmative covenants, as well as restrictions on certain business activities and transactions, of AFG and AAC. The Stipulation and Order has no fixed term and may be terminated or modified only with the approval of OCI. OCI reserved the right to modify or terminate the Stipulation and Order in a manner consistent with the interests of policyholders, creditors and the public generally.

The execution of Ambac’s strategy to increase the value of its investment in AAC may also be affected by a new capital framework being developed by OCI ("OCI's Runoff Capital Framework") to assist OCI with making decisions related to capital and liquidity management at AAC. OCI's Runoff Capital Framework is not yet complete and therefore we are not able to predict the results of such and what it may mean for our Legacy Financial Guarantee strategy, particularly as it relates to deleveraging AAC and distributing capital to AFG.

Opportunities for remediating losses on poorly performing insured transactions also depend on market conditions, including the perception of AAC’s creditworthiness, the structure of the underlying risk and associated policy as well as other counterparty specific factors. AAC's ability to commute policies or purchase certain investments may also be limited by available liquidity.

Strategies to Enhance Shareholder Value

Strategies to Enhance Shareholder Value

The Company's primary goal is to maximize long-term shareholder value through the execution of targeted strategies for its (i) Specialty Property and Casualty Insurance and Insurance Distribution businesses and (ii) Legacy Financial Guarantee Insurance business.

Specialty Property and Casualty Insurance and Insurance Distribution strategic priorities include:

•Growing a Specialty Property and Casualty Insurance business which generates underwriting profits and an attractive return on capital from a diversified portfolio of commercial and personal liability risks accessed through program administrators.

•Building an Insurance Distribution business based on deep domain knowledge in specialty and niche classes of risk which generate attractive margins at scale. This will be achieved through acquisitions, new business “de-novo” formation and incubation, and product expansion supported by a centralized technology led shared services offering.

•Making opportunistic investments that are strategic to both the Specialty Property and Casualty Insurance and Insurance Distribution businesses.

Legacy Financial Guarantee Insurance strategic priorities include:

•Actively managing, de-risking and mitigating insured portfolio risk, and pursuing recovery of previously paid losses.

•Improving operating efficiency and optimizing our asset and liability profile.

•Exploring strategic options to further maximize value for AFG.

The execution of Ambac’s strategy to increase the value of its investment in AAC is subject to the restrictions set forth in the Settlement Agreement, dated as of June 7, 2010, as amended (the "Settlement Agreement"), by and among AAC, Ambac Credit Products LLC ("ACP"), AFG and certain counterparties to credit default swaps with ACP that were guaranteed by AAC, as well as the Stipulation and Order among the Office of the Commissioner of Insurance for the State of Wisconsin (“OCI”), AFG and AAC that became effective on February 12, 2018, as amended (the “Stipulation and Order”), each of which requires OCI and, under certain circumstances, holders of surplus notes, to approve certain actions taken by or in respect of AAC. In exercising its approval rights, OCI will act for the benefit of policyholders, and will not take into account the interests of AFG.

The Settlement Agreement limits certain activities of AAC and its subsidiaries, such as issuing indebtedness; engaging in mergers and similar transactions; disposing of assets; making restricted payments; creating or permitting liens; engaging in transactions with affiliates; modifying or creating tax sharing agreements; and taking certain actions with respect to surplus notes (among other restrictions and limitations). The Settlement Agreement includes certain allowances with respect to these activities and generally requires the approval of OCI and, in some cases, holders of

surplus notes issued pursuant to the Settlement Agreement, for consents, waivers or amendments.

The Stipulation and Order includes affirmative covenants, as well as restrictions on certain business activities and transactions, of AFG and AAC. The Stipulation and Order has no fixed term and may be terminated or modified only with the approval of OCI. OCI reserved the right to modify or terminate the Stipulation and Order in a manner consistent with the interests of policyholders, creditors and the public generally.

The execution of Ambac’s strategy to increase the value of its investment in AAC may also be affected by a new capital framework being developed by OCI ("OCI's Runoff Capital Framework") to assist OCI with making decisions related to capital and liquidity management at AAC. OCI's Runoff Capital Framework is not yet complete and therefore we are not able to predict the results of such and what it may mean for our Legacy Financial Guarantee strategy, particularly as it relates to deleveraging AAC and distributing capital to AFG.

Opportunities for remediating losses on poorly performing insured transactions also depend on market conditions, including the perception of AAC’s creditworthiness, the structure of the underlying risk and associated policy as well as other counterparty specific factors. AAC's ability to commute policies or purchase certain investments may also be limited by available liquidity.

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Basis of Presentation and Significant Accounting Policies (Notes)

3 Months Ended

Mar. 31, 2023

Accounting Policies [Abstract]

Organization, Consolidation and Presentation of Financial Statements Disclosure

2.    BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES

The Company has disclosed its significant accounting policies in Note 2. Basis of Presentation and Significant Accounting Policies in the Notes to Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022. The following significant accounting policies provide an update to those included in the Company’s Annual Report on Form 10-K.

Consolidation:

The consolidated financial statements include the accounts of AFG and all other entities in which AFG (directly or through its subsidiaries) has a controlling financial interest, including variable interest entities (“VIEs”) for which AFG or an AFG subsidiary is deemed the primary beneficiary in accordance with the Consolidation Topic of the Accounting Standards Codification ("ASC"). All significant intercompany balances have been eliminated. See Note 9. Variable Interest Entities, for a detailed discussion of Ambac’s involvement in VIEs, Ambac’s methodology for determining whether Ambac is required to consolidate a VIE and the effects of VIEs being consolidated and deconsolidated.

Basis of Presentation:

The accompanying unaudited consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles ("GAAP") for interim financial reporting and with the instructions to Form 10-Q and Article 10 of

Regulation S-X. Accordingly, they do not include all of the information and disclosures required by GAAP for annual periods. These consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Annual Report on Form 10-K for the year ended December 31, 2022. The accompanying consolidated financial statements have not been audited by an independent registered public accounting firm in accordance with the standards of the Public Company Accounting Oversight Board (U.S.), but in the opinion of management such financial statements include all adjustments necessary for the fair presentation of the Company’s consolidated financial position and results of operations. The results of operations for the three months ended March 31, 2023, may not be indicative of the results that may be expected for the year ending December 31, 2023. The December 31, 2022, consolidated balance sheet was derived from audited financial statements.

The preparation of financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. As additional information becomes available or actual amounts become determinable, the recorded estimates are revised and reflected in operating results.

Foreign Currency:

The impact of non-functional currency transactions and the remeasurement of non-functional currency assets and liabilities into the respective subsidiaries' functional currency (collectively "foreign currency transactions gains/(losses)") are $(2) and $1 for the three months ended March 31, 2023 and 2022, respectively. Foreign currency transactions gains/(losses) are primarily the result of remeasuring Ambac UK's assets and liabilities denominated in currencies (primarily the U.S. dollar and the Euro) other than its functional currency (the British Pound Sterling).

Redeemable Noncontrolling Interest:

The All Trans, Capacity Marine and Xchange acquisitions, further described in the in the Notes to Consolidated Financial Statements included in Part II, Item 8 in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022, resulted in 85%, 80% and 80%, respectively, ownership of the acquired entities by Ambac. Under the terms of the acquisition agreements, Ambac has call options to purchase the remaining 15%, 20% and 20%, respectively, from the minority owners (i.e., noncontrolling interests) and the minority owners have put options to sell the remaining 15%, 20% and 20%, respectively, to Ambac. Because the exercise of the put options are outside the control of Ambac, in accordance with the Distinguishing Liabilities from Equity Topic of the ASC, Ambac reports redeemable noncontrolling interests in the mezzanine section of its consolidated balance sheet.

The redeemable noncontrolling interest is remeasured each period as the greater of:

i.the carrying value under ASC 810, which attributes a portion of consolidated net income (loss) to the redeemable noncontrolling interest, and

ii.the redemption value of the put option under ASC 480 as if it were exercisable at the end of the reporting period.

Any increase (decrease) in the carrying amount of the redeemable noncontrolling interest as a result of adjusting to the redemption value of the put option is recorded as an offset to retained earnings. The impact of such differences on earnings per share are presented in Note 12. Net Income Per Share.

Following is a rollforward of redeemable noncontrolling interest.

Three Months Ended March 31,	2023		2022
Beginning balance	$	20	$	18
Net income attributable to redeemable noncontrolling interest (ASC 810)	—		—
Adjustment to redemption value (ASC 480)	—		—
Ending balance	$	20	$	18

Supplemental Disclosure of Cash Flow Information	Three Months Ended March 31,
	2023		2022
Cash paid during the period for:
Income taxes	$	4	$	2
Interest on long-term debt	50		15
Non-cash investing and financing activities:
Exchange of investments in Puerto Rico bonds for new securities issued in the restructuring transactions	$	—	$	185
Securities acquired (transferred) in transactions related to Puerto Rico restructurings	(1)		—
	March 31,
	2023		2022
Reconciliation of cash, cash equivalents, and restricted cash reported within the Consolidated Balance Sheets to the Consolidated Statements of Cash Flows:
Cash and cash equivalents	$	38	$	60
Restricted cash	10		7
Variable Interest Entity restricted cash	256		49
Total cash, cash equivalents, and restricted cash shown on the Consolidated Statements of Cash Flows	$	304	$	116

Restricted cash is cash that we do not have the right to use for general purposes and includes fiduciary cash held by Ambac's insurance distribution subsidiaries and consolidated variable interest entity cash to support the obligations of the consolidated VIEs and cash received as collateral under their derivatives agreements.

Reclassifications and Rounding

Reclassifications may have been made to prior years' amounts to conform to the current year's presentation. Certain amounts and tables in the consolidated financial statements and associated notes may not add due to rounding.

Adopted Accounting Standards:

There have been no new accounting standards adopted during 2023.

Future Application of Accounting Standards:

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Segment Reporting

3 Months Ended

Mar. 31, 2023

Segment Reporting [Abstract]

Segment Reporting Disclosure

3.    SEGMENT INFORMATION

The Company reports its results of operations in three segments: Legacy Financial Guarantee Insurance, Specialty Property and Casualty Insurance and Insurance Distribution, separate from Corporate and Other, which is consistent with the manner in which the Company's chief operating decision maker ("CODM") reviews the business to assess performance and allocate resources. See Note 1. Background and Business Description for a description of each of the Company's business segments.

The following tables summarize the components of the Company’s total revenues and expenses, pretax income (loss) and total assets by reportable business segment. Information provided below for “Corporate and Other” primarily relates to the operations of AFG, which will include investment income on its investment portfolio and costs to maintain the operations of AFG, including public company reporting, capital management and business development costs for the acquisition and development of new business initiatives.

	Three Months Ended March 31, 2023										Three Months Ended March 31, 2022
	Legacy Financial Guarantee Insurance		Specialty Property & Casualty Insurance		Insurance Distribution		Corporate & Other		Consoli-dated (2)		Legacy Financial Guarantee Insurance		Specialty Property & Casualty Insurance		Insurance Distribution		Corporate & Other		Consoli-dated (2)
Revenues:
Net premiums earned	$	7	$	7					$	14	$	13	$	1					$	15
Commission income					$	14			14						$	9			9
Program fees			1						1				—						—
Net investment income	31		1				$	2	34		5		—				$	—	5
Net investment gains (losses), including impairments	(4)		—				—		(4)		10		—				—		10
Net gains (losses) on derivative contracts	(3)						—		(4)		57								57
Other (1)	2		—		—		—		2		24		—		—		—		24
Total revenues (2)	32		9		15		2		58		109		2		9		—		119
Expenses:
Losses and loss adjustment expenses	13		5						18		23		1						24
Amortization of deferred acquisition costs, net	—		1						1		—		—						—
Commission expenses					8				8						5				5
General and administrative expenses (3)	28		4		2		2		36		21		3		1		3		29
Depreciation expense (3)	—		—		—		—		—		—		—		—		—		—
Intangible amortization	6				1				7		14				1				14
Interest expense	16								16		44								44
Total expenses (2)	64		10		11		2		86		102		4		6		3		116
Pretax income (loss)	$	(32)	$	(1)	$	4	$	—	$	(29)	$	6	$	(2)	$	2	$	(3)	$	3
Total assets (2)	$	7,503	$	349	$	140	$	227	$	8,219	$	11,075	$	191	$	97	$	168	$	11,531

(1)Other revenues include the following line item on the Consolidated Statements of Total Comprehensive Income: Income (loss) on variable interest entities and other income.

(2)Inter-segment revenues and inter-segment pre-tax income (loss) amounts are insignificant and are not presented separately. Total assets noted in the Corporate and Other Column is net of AFG's investment in surplus notes issued by the Legacy Financial Guarantee Segment with fair values of $0 and $77 at March 31, 2023 and 2022.

(3)The Consolidated Statements of Comprehensive Income presents the sum of these items as General & Administrative Expenses.

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Investments

3 Months Ended

Mar. 31, 2023

Investments, Debt and Equity Securities [Abstract]

Investments

4.    INVESTMENTS

Ambac’s non-VIE invested assets are primarily comprised of fixed maturity securities classified as either available-for-sale or trading securities, and interests in pooled investment funds, which are reported within Other investments on the Consolidated Balance Sheets. Interests in pooled investment funds in the form of common stock or in-substance common stock are classified as trading securities, while limited partner interests in such funds are

reported using the equity method. Fixed maturity securities classified as trading are unrated municipal bond obligations of Puerto Rico issuing entities that are part of the the PROMESA restructuring process as described further in Note 6. Insurance Contracts.

Fixed Maturity Securities:

The amortized cost and estimated fair value of available-for-sale investments, excluding VIE investments, at March 31, 2023 and December 31, 2022, were as follows:

	March 31, 2023:										December 31, 2022:
	Amortized Cost		Allowance for Credit Losses (2)		Gross Unrealized				Estimated Fair Value		Amortized Cost		Allowance for Credit Losses		Gross Unrealized				Estimated Fair Value
					Gains		Losses								Gains		Losses
Fixed maturity securities:
Municipal obligations	$	58	$	—	$	1	$	2	$	57	$	44	$	—	$	—	$	2	$	43
Corporate obligations	732		—		1		54		679		659		—		1		63		598
Foreign obligations	86		—		—		8		79		85		—		—		9		76
U.S. government obligations	66		—		—		3		63		68		—		—		4		65
Residential mortgage-backed securities	231		1		26		16		240		230		—		28		19		238
Commercial mortgage-backed securities	15		—		—		—		15		15		—		—		—		15
Collateralized debt obligations	140		—		—		3		137		141		—		—		4		137
Other asset-backed securities (1)	226		—		3		5		223		227		—		2		5		224
	1,554		1		31		90		1,494		1,469		—		31		106		1,395
Short-term	367		—		—		—		367		507		—		—		—		507
	1,922		1		31		90		1,862		1,977		—		31		106		1,902
Fixed maturity securities pledged as collateral:
Short-term	61		—		—		—		61		64		—		—		—		64
	61		—		—		—		61		64		—		—		—		64
Total available-for-sale investments	$	1,983	$	1	$	31	$	90	$	1,923	$	2,041	$	—	$	31	$	106	$	1,966

(1)Consists primarily of Ambac's holdings of military housing and student loan securities.

(2)For the three months ended March 31, 2023, the allowance for credit losses increased $1 on residential mortgage-backed securities on which credit losses were not previously recorded.

The amortized cost and estimated fair value of available-for-sale investments, excluding VIE investments, at March 31, 2023, by contractual maturity, were as follows:

	Amortized Cost		Estimated Fair Value
Due in one year or less	$	486	$	485
Due after one year through five years	536		508
Due after five years through ten years	297		268
Due after ten years	53		47
	1,371		1,307
Residential mortgage-backed securities	231		240
Commercial mortgage-backed securities	15		15
Collateralized debt obligations	140		137
Other asset-backed securities	226		223
Total	$	1,983	$	1,923

Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay certain obligations with or without call or prepayment penalties.

Unrealized Losses on Fixed Maturity Securities:

The following table shows gross unrealized losses and fair values of Ambac’s available-for-sale investments, excluding VIE investments, which at March 31, 2023 and December 31, 2022, did not have an allowance for credit losses under the CECL standard. This information is aggregated by investment category and length of time that the individual securities have been in a continuous unrealized loss position, at March 31, 2023 and December 31, 2022:

	March 31, 2023												December 31, 2022
	Less Than 12 Months				12 Months or More				Total				Less Than 12 Months				12 Months or More				Total
	Fair  Value		Gross Unrealized Loss		Fair  Value		Gross Unrealized Loss		Fair  Value		Gross Unrealized Loss		Fair  Value		Gross Unrealized Loss		Fair  Value		Gross Unrealized Loss		Fair  Value		Gross Unrealized Loss
Fixed maturity securities:
Municipal obligations	$	1	$	—	$	17	$	2	$	17	$	2	$	21	$	1	$	7	$	1	$	28	$	2
Corporate obligations	237		7		393		47		630		54		280		21		279		42		559		63
Foreign obligations	19		1		53		7		72		8		27		2		47		7		73		9
U.S. government obligations	19		1		38		2		57		3		40		3		19		1		58		4
Residential mortgage-backed securities	120		14		12		2		132		16		132		19		—		—		132		19
Commercial mortgage-backed securities	3		—		—		—		3		—		3		—		—		—		3		—
Collateralized debt obligations	10		—		115		3		125		3		90		3		36		1		126		4
Other asset-backed securities	105		4		6		1		111		5		198		4		5		1		203		5
	513		27		634		63		1,147		90		791		53		392		53		1,183		106
Short-term	12		—		2		—		14		—		78		—		8		—		86		—
Total temporarily impaired securities	$	525	$	27	$	636	$	63	$	1,161	$	90	$	869	$	53	$	400	$	53	$	1,269	$	106

Management has determined that the securities in the above table do not have credit impairment as of March 31, 2023 and December 31, 2022, based upon (i) no actual or expected principal and interest payment defaults on these securities; (ii) analysis of the creditworthiness of the issuer and financial guarantor, as applicable, and (iii) for debt securities that are non-highly rated beneficial interests in securitized financial assets, analysis of whether there was an adverse change in projected cash flows. Management's evaluation as of March 31, 2023, includes the expectation that all principal and interest payments on securities guaranteed by AAC or Ambac UK will be made timely and in full.

Ambac’s assessment about whether a security is credit impaired reflects management’s current judgment regarding facts and circumstances specific to the security and other factors. If that judgment changes, Ambac may record a charge for credit impairment in future periods.

The declines in fair value and resultant unrealized losses across asset classes as of March 31, 2023, included in the above table resulted from the impact of increasing interest rates and market spreads. Management has determined that the securities with unrealized losses are not credit impaired. Further discussion of management's assessment with respect to security categories with larger unrealized loss balances is below.

Corporate obligations

The gross unrealized losses on corporate obligations as of March 31, 2023, resulted from an increase in interest rates and, to a lesser extent, market spreads since the securities were purchased. Unrealized losses of $53 related to 738 investment grade securities with an average unrealized loss equal to 8% of amortized cost at March 31, 2023. Securities that have below investment grade credit ratings or are unrated comprise $1 of the gross unrealized loss and have an average unrealized loss equal to 6% of amortized cost at March 31, 2023. Management believes that the full and timely receipt of all principal and interest payment on corporate obligations with unrealized losses as of March 31, 2022, is probable.

Residential mortgage-backed securities and Other asset-backed securities

As of March 31, 2023, $16 of the unrealized loss on residential mortgage-backed securities related to 12 Ambac insured securities. Five of these account for $15 of the unrealized loss and have an average unrealized loss equal to 13% of amortized cost. The $5 unrealized loss on other asset backed securities related to 11 Ambac-insured securities that have an average unrealized loss equal to 4% of amortized cost. The majority of these unrealized losses for both residential mortgage-backed and other asset-backed securities relate to securities with long dated weighted average lives making their fair values more sensitive to interest rate changes. Also, most of these securities have below investment grade credit ratings or are unrated. The unrealized losses on these obligations resulted from adverse market conditions for long dated credit assets. As noted above, expected cash flows used in evaluating credit impairment of Ambac-insured securities contemplate full and timely payment of all

principal and interest payments. This assumption is included in the projection of model based cash flows used in evaluating credit impairments on beneficial interests in securitized financial assets, including the residential mortgage backed and student loan asset backed securities included in this group.

Investment Income (Loss)

Net investment income (loss) was comprised of the following for the affected periods:

Three Months Ended March 31,	2023		2022
Fixed maturity securities	$	17	$	15
Short-term investments	6		—
Investment expense	(2)		(1)
Securities available-for-sale and short-term	21		14
Fixed maturity securities - trading	—		(9)
Other investments	13		—
Total net investment income (loss)	$	34	$	5

Net investment income (loss) from Other investments primarily represents changes in fair value on equity securities, including certain pooled investment funds, and income from investment limited partnerships and other equity interests accounted for under the equity method.

Net Investments Gains (Losses), including Impairments:

The following table details amounts included in net investment gains (losses) and impairments included in earnings for the affected periods:

Three Months Ended March 31,	2023		2022
Gross realized gains on securities	$	—	$	23
Gross realized losses on securities	(2)		(15)
Foreign exchange gains (losses)	(2)		3
Credit impairments	(1)		(1)
Intent / requirement to sell impairments	—		—
Net investment gains (losses), including impairments	$	(4)	$	10

Ambac had an allowance for credit losses of $1 and $1 at March 31, 2023 and 2022, respectively.

Ambac did not purchase any financial assets with credit deterioration for the three months ended March 31, 2023 and 2022.

Counterparty Collateral, Deposits with Regulators and Other Restrictions:

Ambac routinely pledges and receives collateral related to certain transactions. Securities held directly in Ambac’s investment portfolio with a fair value of $61 and $64 at March 31, 2023 and December 31, 2022, respectively, were pledged to derivative counterparties. Ambac’s derivative counterparties have the right to re-pledge the investment securities and as such, these pledged securities are separately classified on the Consolidated Balance Sheets as “Fixed maturity securities pledged as collateral, at fair value” and "Short-term investments pledged as collateral, at fair value." Refer to Note 7. Derivative Instruments for further

information on cash collateral. There was no cash or securities received from other counterparties that were re-pledged by Ambac.

Securities carried at $23 and $23 at March 31, 2023 and December 31, 2022, respectively, were deposited by Ambac's insurance subsidiaries with governmental authorities or designated custodian banks as required by laws affecting insurance companies. Invested assets carried at $1 and $1 at March 31, 2023 and December 31, 2022, were deposited as security in connection with a letter of credit issued for an office lease.

Guaranteed Securities:

Ambac’s fixed maturity portfolio includes securities covered by guarantees issued by AAC and other financial guarantors

(“insured securities”). The published rating agency ratings on these securities reflect the higher of the financial strength rating of the financial guarantor or the rating of the underlying issuer. Rating agencies do not always publish separate underlying ratings (those ratings excluding the insurance by the financial guarantor). In the event these underlying ratings are not available from the rating agencies, Ambac will assign an internal rating. The following table represents the fair value and weighted-average underlying rating of insured securities in Ambac's investment portfolio at March 31, 2023 and December 31, 2022, respectively: 

	March 31, 2023:							December 31, 2022:
	Municipal Obligations		Mortgage and Asset- backed Securities		Total		Weighted Average Underlying Rating (1)	Municipal Obligations		Mortgage and Asset- backed Securities		Total		Weighted Average Underlying Rating (1)
Ambac Assurance Corporation	$	10	$	392	$	401	B-	$	10	$	394	$	403	B
Total	$	10	$	392	$	401	B-	$	10	$	394	$	403	B

(1)Ratings are based on the lower of Standard & Poor’s or Moody’s rating. If unavailable, Ambac’s internal rating is used.

Other Investments:

Ambac's investment portfolio includes interests in various pooled investment funds. Fair value and additional information about investments in pooled funds, by investment type, is summarized in the table below. Except as noted in the table, fair value as reported is determined using net asset value ("NAV") as a practical expedient. Redemption of certain funds valued using NAV may be subject to withdrawal limitations and/or redemption fees which vary with the timing and notification of withdrawal provided by the investor. In addition to these investments, Ambac has unfunded commitments of $57 to private credit and private equity funds at March 31, 2023.

	Fair Value
Class of Funds	March 31, 2023		December 31, 2022		Redemption Frequency	Redemption Notice Period
Hedge funds (1)	$	178	$	186	quarterly or semi-annually	90 days
Private credit (2)	87		84		quarterly if permitted	180 days if permitted
High yields and leveraged loans (3)	84		80		daily	0 - 30 days
Equity market investments (4) (10)	68		64		daily or quarterly	0 - 90 days
Investment grade floating rate income (5)	47		63		weekly	0 days
Private equity (6)	49		47		quarterly if permitted	90 days if permitted
Real estate properties (7)	22		22		quarterly	10 business days
Convertible bonds (8)(10)	9		8		daily	0 days
Insurance-linked investments (9)	1		1		see footnote (9)	see footnote (9)
Total equity investments in pooled funds	$	545	$	556

(1)This class seeks to generate superior risk-adjusted returns through selective asset sourcing, active trading and hedging strategies across a range of asset types.

(2)This class aims to obtain high long-term returns primarily through credit and preferred equity investments with low liquidity and defined term.

(3)This class of funds includes investments in a range of instruments including high-yield bonds, leveraged loans, CLOs, ABS and floating rate notes to generate income and capital appreciation.

(4)This class of funds aim to achieve long term growth through diversified exposure to global equity-markets.

(5)This class of funds includes investments in high quality floating rate debt securities including ABS and corporate floating rate notes.

(6)This class seeks to generate long-term capital appreciation through investments in private equity, equity-related and other instruments.

(7)Investments consist of UK property to generate income and capital growth.

(8)This class seeks to generate total returns from portfolios focused primarily on convertible securities.

(9)This class seeks to generate returns from insurance markets through investments in catastrophe bonds, life insurance and other insurance linked investments. This investment is restricted in connection with the unwind of certain insurance linked exposures. Ambac has redeemed its investment to the extent permitted by the fund.

(10)These categories include fair value amounts totaling $65 and $61 at March 31, 2023 and December 31, 2022, respectively, that are readily determinable and are priced through pricing vendors, including for Equity market investments $57 and $53 and Convertible bonds investments $9 and 8.

Other investments also include preferred equity investments with a carrying value of $12 and $12 as of March 31, 2023 and December 31, 2022, respectively, that do not have readily determinable fair values and are carried at cost, less any impairments as permitted under the Investments — Equity Securities Topic of the ASC. There were no impairments recorded on these investments or adjustments to fair value to reflect observable price changes in identical or similar investments from the same issuer during the periods presented.

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Fair Value Measurements

3 Months Ended

Mar. 31, 2023

Fair Value Disclosures [Abstract]

Fair Value Measurements

5.    FAIR VALUE MEASUREMENTS

The Fair Value Measurement Topic of the ASC establishes a framework for measuring fair value and disclosures about fair value measurements.

Fair Value Hierarchy:

The Fair Value Measurement Topic of the ASC specifies a fair value hierarchy based on whether the inputs to valuation techniques used to measure fair value are observable or unobservable. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect Company-based assumptions. The fair value hierarchy has three broad levels as follows:

l	Level 1	Quoted prices for identical instruments in active markets. Assets and liabilities classified as Level 1 include US Treasury and other foreign government obligations traded in highly liquid and transparent markets, certain highly liquid pooled fund investments, exchange traded futures contracts and money market funds.
l	Level 2	Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations in which all significant inputs and significant value drivers are observable in active markets. Assets and liabilities classified as Level 2 generally include investments in fixed maturity securities representing municipal, asset-backed and corporate obligations, certain interest rate swap contracts and most long-term debt of variable interest entities consolidated under the Consolidation Topic of the ASC.
l	Level 3	Model derived valuations in which one or more significant inputs or significant value drivers are unobservable. This hierarchy requires the use of observable market data when available. Assets and liabilities classified as Level 3 include certain uncollateralized interest rate swap contracts and certain investments in fixed maturity securities. Additionally, Level 3 assets and liabilities generally include loan receivables, and certain long-term debt of variable interest entities consolidated under the Consolidation Topic of the ASC.

The Fair Value Measurement Topic of the ASC permits, as a practical expedient, the estimation of fair value of certain investments in funds using the net asset value per share of the investment or its equivalent (“NAV”). Investments in funds valued using NAV are not categorized as Level 1, 2 or 3 under the fair value hierarchy. The Investments — Equity Securities Topic of the ASC permits the measurement of certain equity securities without a readily determinable fair value at cost, less impairment, and adjusted to fair value when observable price changes in identical or similar investments from the same issuer occur (the "measurement alternative"). The fair values of investments measured under this measurement alternative are not included in the below disclosures of fair value of financial instruments. The following table sets forth the carrying amount and fair value of Ambac’s financial assets and liabilities as of March 31, 2023 and December 31, 2022, including the level within the fair value hierarchy at which fair value measurements are categorized. As required by the Fair Value Measurement Topic of the ASC, financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement.

	March 31, 2023										December 31, 2022
	Carrying Amount		Total Fair Value		Fair Value Measurements Categorized as:						Carrying Amount		Total Fair Value		Fair Value Measurements Categorized as:
					Level 1		Level 2		Level 3						Level 1		Level 2		Level 3
Financial assets:
Fixed maturity securities:
Municipal obligations	$	86	$	86	$	—	$	86	$	—	$	102	$	102	$	—	$	102	$	—
Corporate obligations	679		679		—		667		13		598		598		—		585		12
Foreign obligations	79		79		79		—		—		76		76		76		—		—
U.S. government obligations	63		63		63		—		—		65		65		65		—		—
Residential mortgage-backed securities	240		240		—		240		—		238		238		—		238		—
Commercial mortgage-backed securities	15		15		—		15		—		15		15		—		15		—
Collateralized debt obligations	137		137		—		137		—		137		137		—		137		—
Other asset-backed securities	223		223		—		155		69		224		224		—		157		67
Fixed maturity securities, pledged as collateral:
Short-term	61		61		61		—		—		64		64		64		—		—
Short term investments	367		367		359		8		—		507		507		506		1		—
Other investments (1)	557		545		65		—		—		568		556		61		—		—
Cash, cash equivalents and restricted cash	40		40		38		2		—		44		44		43		1		—
Derivative assets:
Interest rate swaps—asset position	30		30		—		1		30		27		27		—		1		26
Warrants	1		1		—		—		1		1		1		—		—		1
Other assets-Loans	2		2		—		—		2		10		10		—		—		10
Variable interest entity assets:
Fixed maturity securities: Corporate obligations, fair value option	2,003		2,003		—		—		2,003		1,828		1,828		—		—		1,828
Fixed maturity securities: Municipal obligation, trading	16		16		—		16		—		43		43		—		43		—
Fixed maturity securities: Municipal obligations, available-for-sale	100		100		—		100		—		96		96		—		96		—
Restricted cash	256		256		256		—		—		17		17		17		—		—
Loans	1,856		1,856		—		—		1,856		1,829		1,829		—		—		1,829
Derivative assets: Interest rate swaps—asset position	198		198		—		198		—		190		190		—		190		—
Derivative assets: Currency swaps—asset position	45		45		—		45		—		49		49		—		49		—
Total financial assets	$	7,056	$	7,045	$	922	$	1,669	$	3,974	$	6,726	$	6,715	$	833	$	1,615	$	3,772
Financial liabilities:
Long term debt, including accrued interest	$	935	$	779	$	—	$	764	$	15	$	1,065	$	878	$	—	$	864	$	14
Derivative liabilities:
Interest rate swaps—liability position	44		44		—		44		—		38		38		—		38		—
Liabilities for net financial guarantees written (2)	318		668		—		—		668		159		476		—		—		476
Variable interest entity liabilities:
Long-term debt	3,060		3,053		—		2,937		116		3,107		3,145		—		2,992		154
Derivative liabilities: Interest rate swaps—liability position	1,174		1,174		—		1,174		—		1,048		1,048		—		1,048		—
Total financial liabilities	$	5,531	$	5,717	$	—	$	4,918	$	799	$	5,418	$	5,586	$	—	$	4,942	$	644

(1)Excluded from the fair value measurement categories in the table above are investment funds of $480 and $494 as of March 31, 2023 and December 31, 2022, respectively, which are measured using NAV as a practical expedient. Also excluded from the fair value amounts in the table above are equity securities with a carrying value of $12 and $12 as of March 31, 2023 and December 31, 2022, respectively, that do not have readily determinable fair values and have carrying amounts determined using the measurement alternative.

(2)The carrying value of net financial guarantees written includes financial guarantee amounts in the following balance sheet items: Premium receivables; Reinsurance recoverable on paid and unpaid losses; Deferred ceded premium; Subrogation recoverable; Insurance intangible asset; Unearned premiums; Loss and loss expense reserves; Ceded premiums payable, premiums taxes payable and other deferred fees recorded in Other liabilities.

Determination of Fair Value:

When available, Ambac uses quoted active market prices specific to the financial instrument to determine fair value, and classifies such items within Level 1. The determination of fair value for financial instruments categorized in Level 2 or 3 involves judgment due to the complexity of factors contributing to the valuation. Third-party sources from which we obtain independent market quotes also use assumptions, judgments and estimates in determining financial instrument values and different third parties may use different methodologies or provide different values for financial instruments. In addition, the use of internal valuation models may require assumptions about hypothetical or inactive markets. As a result of these factors, the actual trade value of a financial instrument in the market, or exit value of a financial instrument position by Ambac, may be significantly different from its recorded fair value.

Ambac’s financial instruments carried at fair value are mainly comprised of investments in fixed maturity securities, equity interests in pooled investment funds, derivative instruments and certain variable interest entity assets and liabilities. Valuation of financial instruments is performed by Ambac’s finance group using methods approved by senior financial management with consultation from risk management and portfolio managers as appropriate. Preliminary valuation results are discussed with portfolio managers quarterly to assess consistency with market transactions and trends as applicable. Market transactions such as trades or negotiated settlements of similar positions, if any, are reviewed to validate fair value model results. However, financial instruments valued using significant unobservable inputs typically have very little or no observable market activity. Methods and significant inputs and assumptions used to determine fair values across portfolios are reviewed quarterly by senior financial management. Other valuation control procedures specific to particular portfolios are described further below.

Fixed Maturity Securities:

The fair values of fixed maturity investment securities are based primarily on market prices received from broker quotes or alternative pricing sources. Because many fixed maturity securities do not trade on a daily basis, pricing sources apply available market information through processes such as matrix pricing to calculate fair value. Such prices generally consider a variety of factors, including recent trades of the same and similar securities. In those cases, the items are classified within Level 2. For those fixed maturity investments where quotes were not available or cannot be reasonably corroborated, fair values are based on internal valuation models. Key inputs to the internal valuation models generally include maturity date, coupon and yield curves for asset-type and credit rating characteristics that closely match those characteristics of the specific investment securities being valued. Items valued using valuation models are classified according to the lowest level input or value driver that is significant to the valuation. Thus, an item may be classified in Level 3 even though there may be significant inputs that are readily observable. Longer (shorter) expected maturities or higher (lower) yields used in the valuation model will, in isolation, result in decreases (increases) in fair value. Generally, lower credit ratings or longer expected maturities will be accompanied by higher yields used to value a security. At

March 31, 2023, approximately 5%, 91% and 4% of the fixed maturity investment portfolio (excluding variable interest entity investments) was valued using broker quotes, alternative pricing sources and internal valuation models, respectively. At December 31, 2022, approximately 5%, 91% and 4% of the fixed maturity investment portfolio (excluding variable interest entity investments) was valued using broker quotes, alternative pricing sources and internal valuation models, respectively.

Ambac performs various review and validation procedures to quoted and modeled prices for fixed maturity securities, including price variance analyses, missing and static price reviews, overall valuation analysis by portfolio managers and finance managers and reviews associated with our ongoing impairment analysis. Unusual prices identified through these procedures will be evaluated further against alternative third party quotes (if available), internally modeled prices and/or other relevant data, and the pricing source values will be challenged as necessary. Price challenges generally result in the use of the pricing source’s quote as originally provided or as revised by the source following their internal diligence process. A price challenge may result in a determination by either the pricing source or Ambac management that the pricing source cannot provide a reasonable value for a security or cannot adequately support a quote, in which case Ambac would resort to using either other quotes or internal models. Results of price challenges are reviewed by portfolio managers and finance managers.

Information about the valuation inputs for fixed maturity securities classified as Level 3 is included below:

Other asset-backed securities: This security is a subordinated tranche of a securitization collateralized by Ambac-insured military housing bonds. The fair value classified as Level 3 was $69 and $67 at March 31, 2023 and December 31, 2022, respectively. Fair value was calculated using a discounted cash flow approach with expected future cash flows discounted using a yield consistent with the security type and rating. Significant inputs for the valuation at March 31, 2023 and December 31, 2022 include the following:

March 31, 2023:
a. Coupon rate:	5.98%
b. Average Life:	13.30 years
c. Yield:	12.00%
December 31, 2022:
a. Coupon rate:	5.98%
b. Average Life:	13.46 years
c. Yield:	12.60%

Corporate obligations: This includes certain investments in convertible debt securities. The fair value classified as Level 3 was $13 and $12 at March 31, 2023 and December 31, 2022, respectively. Fair value was calculated by discounting cash flows to average maturity of 1.5 years and yield of 11.6% at March 31, 2023 and average maturity of 1.75 years and yield of 11.3% at

December 31, 2022. Yields used are consistent with the security type and rating.

Other Investments:

Other investments primarily relate to investments in pooled investment funds. The fair value of pooled investment funds is determined using dealer quotes or alternative pricing sources when such investments have readily determinable fair values. When fair value is not readily determinable, pooled investment funds are valued using NAV as a practical expedient as permitted under the Fair Value Measurement Topic of the ASC. Refer to Note 4. Investments for additional information about such investments in pooled funds that are reported at fair value using NAV as a practical expedient.

Derivative Instruments:

Ambac’s derivative instruments primarily comprise interest rate swaps and exchange traded futures contracts. Fair value is determined based upon market quotes from independent sources, when available. When independent quotes are not available, fair value is determined using valuation models. These valuation models require market-driven inputs, including contractual terms, credit spreads, and yield curves. The valuation of certain derivative contracts may require the use of data inputs and assumptions that are determined by management and are not readily observable in the market. Under the Fair Value Measurement Topic of the ASC, Ambac is required to consider its own credit risk when measuring the fair value of derivative liabilities. Factors considered in estimating the amount of any Ambac credit valuation adjustment ("CVA") on such contracts include collateral posting provisions, right of set-off with the counterparty, the period of time remaining on the derivative and the pricing of recent terminations. The aggregate Ambac CVA impact was not significant to the fair value of derivatives at March 31, 2023 or December 31, 2022.

Interest rate swaps that are not centrally cleared are valued using vendor-developed models that incorporate interest rates and yield curves that are observable and regularly quoted. These models provide the net present value of the derivatives based on contractual terms and observable market data. Generally, the need for counterparty (or Ambac) CVAs on interest rate derivatives is mitigated by the existence of collateral posting agreements under which adequate collateral has been posted. Certain of these derivative contracts entered into with financial guarantee customers are not subject to collateral posting agreements. Counterparty credit risk related to such customer derivative assets is included in our determination of their fair value.

Ambac holds warrants to purchase preferred stock of a development stage company. These warrants have a fair value of $1 and $1 as of March 31, 2023 and December 31, 2022, respectively. Fair value was determined using a standard warrant valuation model with internally developed input assumptions.

Financial Guarantees:

Fair value of net financial guarantees written represents our estimate of the cost to Ambac to completely transfer its insurance obligation to another market participant of comparable credit worthiness. In theory, this amount should be the same amount

that another market participant of comparable credit worthiness would hypothetically charge in the marketplace, on a present value basis, to provide the same protection as of the balance sheet date. This fair value estimate of financial guarantees is presented on a net basis and includes direct and assumed contracts written, net of ceded reinsurance contracts.

Long-term Debt:

Long-term debt includes AAC surplus notes, the Tier 2 Notes issued in connection with the Rehabilitation Exit Transactions (fully redeemed during the first quarter of 2023) and the Ambac UK debt issued in connection with the Ballantyne commutation. The fair values of surplus notes and Tier 2 Notes are classified as Level 2. The fair value of Ambac UK debt is classified as Level 3.

Other Financial Assets and Liabilities:

Included in Other assets are loans, the fair values of which are estimated based upon internal valuation models and are classified as Level 3.

Variable Interest Entity Assets and Liabilities:

The financial assets and liabilities of Legacy Financial Guarantee Insurance VIEs ("FG VIEs") consolidated under the Consolidation Topic of the ASC consist primarily of fixed maturity securities and loans held by the VIEs, derivative instruments and notes issued by the VIEs which are reported as long-term debt. As described in Note 9. Variable Interest Entities, these FG VIEs are securitization entities which have liabilities and/or assets guaranteed by AAC or Ambac UK.

The fair values of FG VIE long-term debt are based on price quotes received from independent market sources when available. Such quotes are considered Level 2 and generally consider a variety of factors, including recent trades of the same and similar securities. For those instruments where quotes were not available or cannot be reasonably corroborated, fair values are based on internal valuation models. Comparable to the sensitivities of investments in fixed maturity securities described above, longer (shorter) expected maturities or higher (lower) yields used in the valuation model will, in isolation, result in decreases (increases) in fair value liability measurement for FG VIE long-term debt.

FG VIE derivative asset and liability fair values are determined using vendor-developed valuation models, which incorporated observable market data related to specific derivative contractual terms including interest rates, foreign exchange rates and yield curves.

The fair value of FG VIE fixed maturity securities and loan assets are generally based on Level 2 market price quotes received from independent market sources when available. When FG VIE asset fair values are not readily available from market quotes, values are estimated internally. Internal valuations of FG VIE’s fixed maturity securities or loan assets are derived from the fair values of the notes issued by the respective VIE and the VIE’s derivatives, determined as described above, adjusted for the fair values of Ambac’s financial guarantees associated with the VIE. The fair value of financial guarantees consist of: (i) estimated future premium cash flows discounted at a rate consistent with

that implicit in the fair value of the VIE’s liabilities and (ii) estimates of future claim payments discounted at a rate that includes Ambac’s own credit risk. Estimated future premium payments to be paid by the VIEs were discounted at a weighted average rate of 6.3% and 6.8% at March 31, 2023 and December

31, 2022, respectively. At March 31, 2023, the range of these discount rates was between 5.5% and 7.3%. At December 31, 2022, the range of these discount rates were between 5.8% and 8.5%.

Additional Fair Value Information for Financial Assets and Liabilities Accounted for at Fair Value:

The following tables present the changes in the Level 3 fair value category for the periods presented in 2023 and 2022. Ambac classifies financial instruments in Level 3 of the fair value hierarchy when there is reliance on at least one significant unobservable input to the valuation model. In addition to these unobservable inputs, the valuation models for Level 3 financial instruments typically also rely on a number of inputs that are readily observable either directly or indirectly. Thus, the gains and losses presented below include changes in the fair value related to both observable and unobservable inputs.

Level 3 - Financial Assets and Liabilities Accounted for at Fair Value
					VIE Assets
	Investments		Derivatives		Investments		Loans		Total
Three Months Ended March 31, 2023:
Balance, beginning of period	$	79	$	26	$	1,828	$	1,829	$	3,762
Total gains/(losses) realized and unrealized:
Included in earnings	—		5		133		59		196
Included in other comprehensive income	3		—		43		42		87
Settlements	—		—		—		(73)		(74)
Balance, end of period	$	81	$	31	$	2,003	$	1,856	$	3,972
The amount of total gains/(losses) included in earnings attributable to the change in unrealized gains or losses relating to assets and liabilities still held at the reporting date	$	—	$	5	$	133	$	59	$	196
The amount of total gains/(losses) included in other comprehensive income attributable to the change in unrealized gains or losses relating to assets and liabilities still held at the reporting date	$	3	$	—	$	43	$	42	$	87
Three Months Ended March 31, 2022:
Balance, beginning of period	$	91	$	70	$	3,320	$	2,718	$	6,199
Total gains/(losses) realized and unrealized:
Included in earnings	—		(17)		(93)		(96)		(204)
Included in other comprehensive income	(4)		—		(96)		(76)		(176)
Settlements	(1)		(2)		—		(78)		(80)
Balance, end of period	$	86	$	52	$	3,131	$	2,469	$	5,738
The amount of total gains/(losses) included in earnings attributable to the change in unrealized gains or losses relating to assets and liabilities still held at the reporting date	$	—	$	(17)	$	(93)	$	(96)	$	(204)
The amount of total gains/(losses) included in other comprehensive income attributable to the change in unrealized gains or losses relating to assets and liabilities still held at the reporting date	$	(4)	$	—	$	(96)	$	(76)	$	(176)

Invested assets and VIE long-term debt are transferred into Level 3 when internal valuation models that include significant unobservable inputs are used to estimate fair value. All such securities that have internally modeled fair values have been classified as Level 3. Derivative instruments are transferred into Level 3 when the use of unobservable inputs becomes significant to the overall valuation. There were no transfers of financial instruments into or out of Level 3 in the periods disclosed.

Gains and losses (realized and unrealized) relating to Level 3 assets and liabilities included in earnings for the affected periods are reported as follows:

	Three Months Ended March 31, 2023								Three Months Ended March 31, 2022
	Net Investment Income		Net Gains (Losses) on Derivative Contracts		Income (Loss)  on Variable Interest Entities		Other Income or  (Expense)		Net Investment Income		Net Gains (Losses) on Derivative Contracts		Income (Loss)  on Variable Interest Entities		Other Income or  (Expense)
Total gains (losses) included in earnings for the period	$	—	$	5	$	191	$	—	$	—	$	(17)	$	(188)	$	—
Changes in unrealized gains (losses) relating to financial instruments still held at the reporting date	—		5		191		—		—		(17)		(188)		—

XML

Insurance Contracts

3 Months Ended

Mar. 31, 2023

Insurance [Abstract]

Fair Value Measurements

5.    FAIR VALUE MEASUREMENTS

The Fair Value Measurement Topic of the ASC establishes a framework for measuring fair value and disclosures about fair value measurements.

Fair Value Hierarchy:

The Fair Value Measurement Topic of the ASC specifies a fair value hierarchy based on whether the inputs to valuation techniques used to measure fair value are observable or unobservable. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect Company-based assumptions. The fair value hierarchy has three broad levels as follows:

l	Level 1	Quoted prices for identical instruments in active markets. Assets and liabilities classified as Level 1 include US Treasury and other foreign government obligations traded in highly liquid and transparent markets, certain highly liquid pooled fund investments, exchange traded futures contracts and money market funds.
l	Level 2	Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations in which all significant inputs and significant value drivers are observable in active markets. Assets and liabilities classified as Level 2 generally include investments in fixed maturity securities representing municipal, asset-backed and corporate obligations, certain interest rate swap contracts and most long-term debt of variable interest entities consolidated under the Consolidation Topic of the ASC.
l	Level 3	Model derived valuations in which one or more significant inputs or significant value drivers are unobservable. This hierarchy requires the use of observable market data when available. Assets and liabilities classified as Level 3 include certain uncollateralized interest rate swap contracts and certain investments in fixed maturity securities. Additionally, Level 3 assets and liabilities generally include loan receivables, and certain long-term debt of variable interest entities consolidated under the Consolidation Topic of the ASC.

The Fair Value Measurement Topic of the ASC permits, as a practical expedient, the estimation of fair value of certain investments in funds using the net asset value per share of the investment or its equivalent (“NAV”). Investments in funds valued using NAV are not categorized as Level 1, 2 or 3 under the fair value hierarchy. The Investments — Equity Securities Topic of the ASC permits the measurement of certain equity securities without a readily determinable fair value at cost, less impairment, and adjusted to fair value when observable price changes in identical or similar investments from the same issuer occur (the "measurement alternative"). The fair values of investments measured under this measurement alternative are not included in the below disclosures of fair value of financial instruments. The following table sets forth the carrying amount and fair value of Ambac’s financial assets and liabilities as of March 31, 2023 and December 31, 2022, including the level within the fair value hierarchy at which fair value measurements are categorized. As required by the Fair Value Measurement Topic of the ASC, financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement.

	March 31, 2023										December 31, 2022
	Carrying Amount		Total Fair Value		Fair Value Measurements Categorized as:						Carrying Amount		Total Fair Value		Fair Value Measurements Categorized as:
					Level 1		Level 2		Level 3						Level 1		Level 2		Level 3
Financial assets:
Fixed maturity securities:
Municipal obligations	$	86	$	86	$	—	$	86	$	—	$	102	$	102	$	—	$	102	$	—
Corporate obligations	679		679		—		667		13		598		598		—		585		12
Foreign obligations	79		79		79		—		—		76		76		76		—		—
U.S. government obligations	63		63		63		—		—		65		65		65		—		—
Residential mortgage-backed securities	240		240		—		240		—		238		238		—		238		—
Commercial mortgage-backed securities	15		15		—		15		—		15		15		—		15		—
Collateralized debt obligations	137		137		—		137		—		137		137		—		137		—
Other asset-backed securities	223		223		—		155		69		224		224		—		157		67
Fixed maturity securities, pledged as collateral:
Short-term	61		61		61		—		—		64		64		64		—		—
Short term investments	367		367		359		8		—		507		507		506		1		—
Other investments (1)	557		545		65		—		—		568		556		61		—		—
Cash, cash equivalents and restricted cash	40		40		38		2		—		44		44		43		1		—
Derivative assets:
Interest rate swaps—asset position	30		30		—		1		30		27		27		—		1		26
Warrants	1		1		—		—		1		1		1		—		—		1
Other assets-Loans	2		2		—		—		2		10		10		—		—		10
Variable interest entity assets:
Fixed maturity securities: Corporate obligations, fair value option	2,003		2,003		—		—		2,003		1,828		1,828		—		—		1,828
Fixed maturity securities: Municipal obligation, trading	16		16		—		16		—		43		43		—		43		—
Fixed maturity securities: Municipal obligations, available-for-sale	100		100		—		100		—		96		96		—		96		—
Restricted cash	256		256		256		—		—		17		17		17		—		—
Loans	1,856		1,856		—		—		1,856		1,829		1,829		—		—		1,829
Derivative assets: Interest rate swaps—asset position	198		198		—		198		—		190		190		—		190		—
Derivative assets: Currency swaps—asset position	45		45		—		45		—		49		49		—		49		—
Total financial assets	$	7,056	$	7,045	$	922	$	1,669	$	3,974	$	6,726	$	6,715	$	833	$	1,615	$	3,772
Financial liabilities:
Long term debt, including accrued interest	$	935	$	779	$	—	$	764	$	15	$	1,065	$	878	$	—	$	864	$	14
Derivative liabilities:
Interest rate swaps—liability position	44		44		—		44		—		38		38		—		38		—
Liabilities for net financial guarantees written (2)	318		668		—		—		668		159		476		—		—		476
Variable interest entity liabilities:
Long-term debt	3,060		3,053		—		2,937		116		3,107		3,145		—		2,992		154
Derivative liabilities: Interest rate swaps—liability position	1,174		1,174		—		1,174		—		1,048		1,048		—		1,048		—
Total financial liabilities	$	5,531	$	5,717	$	—	$	4,918	$	799	$	5,418	$	5,586	$	—	$	4,942	$	644

(1)Excluded from the fair value measurement categories in the table above are investment funds of $480 and $494 as of March 31, 2023 and December 31, 2022, respectively, which are measured using NAV as a practical expedient. Also excluded from the fair value amounts in the table above are equity securities with a carrying value of $12 and $12 as of March 31, 2023 and December 31, 2022, respectively, that do not have readily determinable fair values and have carrying amounts determined using the measurement alternative.

(2)The carrying value of net financial guarantees written includes financial guarantee amounts in the following balance sheet items: Premium receivables; Reinsurance recoverable on paid and unpaid losses; Deferred ceded premium; Subrogation recoverable; Insurance intangible asset; Unearned premiums; Loss and loss expense reserves; Ceded premiums payable, premiums taxes payable and other deferred fees recorded in Other liabilities.

Determination of Fair Value:

When available, Ambac uses quoted active market prices specific to the financial instrument to determine fair value, and classifies such items within Level 1. The determination of fair value for financial instruments categorized in Level 2 or 3 involves judgment due to the complexity of factors contributing to the valuation. Third-party sources from which we obtain independent market quotes also use assumptions, judgments and estimates in determining financial instrument values and different third parties may use different methodologies or provide different values for financial instruments. In addition, the use of internal valuation models may require assumptions about hypothetical or inactive markets. As a result of these factors, the actual trade value of a financial instrument in the market, or exit value of a financial instrument position by Ambac, may be significantly different from its recorded fair value.

Ambac’s financial instruments carried at fair value are mainly comprised of investments in fixed maturity securities, equity interests in pooled investment funds, derivative instruments and certain variable interest entity assets and liabilities. Valuation of financial instruments is performed by Ambac’s finance group using methods approved by senior financial management with consultation from risk management and portfolio managers as appropriate. Preliminary valuation results are discussed with portfolio managers quarterly to assess consistency with market transactions and trends as applicable. Market transactions such as trades or negotiated settlements of similar positions, if any, are reviewed to validate fair value model results. However, financial instruments valued using significant unobservable inputs typically have very little or no observable market activity. Methods and significant inputs and assumptions used to determine fair values across portfolios are reviewed quarterly by senior financial management. Other valuation control procedures specific to particular portfolios are described further below.

Fixed Maturity Securities:

The fair values of fixed maturity investment securities are based primarily on market prices received from broker quotes or alternative pricing sources. Because many fixed maturity securities do not trade on a daily basis, pricing sources apply available market information through processes such as matrix pricing to calculate fair value. Such prices generally consider a variety of factors, including recent trades of the same and similar securities. In those cases, the items are classified within Level 2. For those fixed maturity investments where quotes were not available or cannot be reasonably corroborated, fair values are based on internal valuation models. Key inputs to the internal valuation models generally include maturity date, coupon and yield curves for asset-type and credit rating characteristics that closely match those characteristics of the specific investment securities being valued. Items valued using valuation models are classified according to the lowest level input or value driver that is significant to the valuation. Thus, an item may be classified in Level 3 even though there may be significant inputs that are readily observable. Longer (shorter) expected maturities or higher (lower) yields used in the valuation model will, in isolation, result in decreases (increases) in fair value. Generally, lower credit ratings or longer expected maturities will be accompanied by higher yields used to value a security. At

March 31, 2023, approximately 5%, 91% and 4% of the fixed maturity investment portfolio (excluding variable interest entity investments) was valued using broker quotes, alternative pricing sources and internal valuation models, respectively. At December 31, 2022, approximately 5%, 91% and 4% of the fixed maturity investment portfolio (excluding variable interest entity investments) was valued using broker quotes, alternative pricing sources and internal valuation models, respectively.

Ambac performs various review and validation procedures to quoted and modeled prices for fixed maturity securities, including price variance analyses, missing and static price reviews, overall valuation analysis by portfolio managers and finance managers and reviews associated with our ongoing impairment analysis. Unusual prices identified through these procedures will be evaluated further against alternative third party quotes (if available), internally modeled prices and/or other relevant data, and the pricing source values will be challenged as necessary. Price challenges generally result in the use of the pricing source’s quote as originally provided or as revised by the source following their internal diligence process. A price challenge may result in a determination by either the pricing source or Ambac management that the pricing source cannot provide a reasonable value for a security or cannot adequately support a quote, in which case Ambac would resort to using either other quotes or internal models. Results of price challenges are reviewed by portfolio managers and finance managers.

Information about the valuation inputs for fixed maturity securities classified as Level 3 is included below:

Other asset-backed securities: This security is a subordinated tranche of a securitization collateralized by Ambac-insured military housing bonds. The fair value classified as Level 3 was $69 and $67 at March 31, 2023 and December 31, 2022, respectively. Fair value was calculated using a discounted cash flow approach with expected future cash flows discounted using a yield consistent with the security type and rating. Significant inputs for the valuation at March 31, 2023 and December 31, 2022 include the following:

March 31, 2023:
a. Coupon rate:	5.98%
b. Average Life:	13.30 years
c. Yield:	12.00%
December 31, 2022:
a. Coupon rate:	5.98%
b. Average Life:	13.46 years
c. Yield:	12.60%

Corporate obligations: This includes certain investments in convertible debt securities. The fair value classified as Level 3 was $13 and $12 at March 31, 2023 and December 31, 2022, respectively. Fair value was calculated by discounting cash flows to average maturity of 1.5 years and yield of 11.6% at March 31, 2023 and average maturity of 1.75 years and yield of 11.3% at

December 31, 2022. Yields used are consistent with the security type and rating.

Other Investments:

Other investments primarily relate to investments in pooled investment funds. The fair value of pooled investment funds is determined using dealer quotes or alternative pricing sources when such investments have readily determinable fair values. When fair value is not readily determinable, pooled investment funds are valued using NAV as a practical expedient as permitted under the Fair Value Measurement Topic of the ASC. Refer to Note 4. Investments for additional information about such investments in pooled funds that are reported at fair value using NAV as a practical expedient.

Derivative Instruments:

Ambac’s derivative instruments primarily comprise interest rate swaps and exchange traded futures contracts. Fair value is determined based upon market quotes from independent sources, when available. When independent quotes are not available, fair value is determined using valuation models. These valuation models require market-driven inputs, including contractual terms, credit spreads, and yield curves. The valuation of certain derivative contracts may require the use of data inputs and assumptions that are determined by management and are not readily observable in the market. Under the Fair Value Measurement Topic of the ASC, Ambac is required to consider its own credit risk when measuring the fair value of derivative liabilities. Factors considered in estimating the amount of any Ambac credit valuation adjustment ("CVA") on such contracts include collateral posting provisions, right of set-off with the counterparty, the period of time remaining on the derivative and the pricing of recent terminations. The aggregate Ambac CVA impact was not significant to the fair value of derivatives at March 31, 2023 or December 31, 2022.

Interest rate swaps that are not centrally cleared are valued using vendor-developed models that incorporate interest rates and yield curves that are observable and regularly quoted. These models provide the net present value of the derivatives based on contractual terms and observable market data. Generally, the need for counterparty (or Ambac) CVAs on interest rate derivatives is mitigated by the existence of collateral posting agreements under which adequate collateral has been posted. Certain of these derivative contracts entered into with financial guarantee customers are not subject to collateral posting agreements. Counterparty credit risk related to such customer derivative assets is included in our determination of their fair value.

Ambac holds warrants to purchase preferred stock of a development stage company. These warrants have a fair value of $1 and $1 as of March 31, 2023 and December 31, 2022, respectively. Fair value was determined using a standard warrant valuation model with internally developed input assumptions.

Financial Guarantees:

Fair value of net financial guarantees written represents our estimate of the cost to Ambac to completely transfer its insurance obligation to another market participant of comparable credit worthiness. In theory, this amount should be the same amount

that another market participant of comparable credit worthiness would hypothetically charge in the marketplace, on a present value basis, to provide the same protection as of the balance sheet date. This fair value estimate of financial guarantees is presented on a net basis and includes direct and assumed contracts written, net of ceded reinsurance contracts.

Long-term Debt:

Long-term debt includes AAC surplus notes, the Tier 2 Notes issued in connection with the Rehabilitation Exit Transactions (fully redeemed during the first quarter of 2023) and the Ambac UK debt issued in connection with the Ballantyne commutation. The fair values of surplus notes and Tier 2 Notes are classified as Level 2. The fair value of Ambac UK debt is classified as Level 3.

Other Financial Assets and Liabilities:

Included in Other assets are loans, the fair values of which are estimated based upon internal valuation models and are classified as Level 3.

Variable Interest Entity Assets and Liabilities:

The financial assets and liabilities of Legacy Financial Guarantee Insurance VIEs ("FG VIEs") consolidated under the Consolidation Topic of the ASC consist primarily of fixed maturity securities and loans held by the VIEs, derivative instruments and notes issued by the VIEs which are reported as long-term debt. As described in Note 9. Variable Interest Entities, these FG VIEs are securitization entities which have liabilities and/or assets guaranteed by AAC or Ambac UK.

The fair values of FG VIE long-term debt are based on price quotes received from independent market sources when available. Such quotes are considered Level 2 and generally consider a variety of factors, including recent trades of the same and similar securities. For those instruments where quotes were not available or cannot be reasonably corroborated, fair values are based on internal valuation models. Comparable to the sensitivities of investments in fixed maturity securities described above, longer (shorter) expected maturities or higher (lower) yields used in the valuation model will, in isolation, result in decreases (increases) in fair value liability measurement for FG VIE long-term debt.

FG VIE derivative asset and liability fair values are determined using vendor-developed valuation models, which incorporated observable market data related to specific derivative contractual terms including interest rates, foreign exchange rates and yield curves.

The fair value of FG VIE fixed maturity securities and loan assets are generally based on Level 2 market price quotes received from independent market sources when available. When FG VIE asset fair values are not readily available from market quotes, values are estimated internally. Internal valuations of FG VIE’s fixed maturity securities or loan assets are derived from the fair values of the notes issued by the respective VIE and the VIE’s derivatives, determined as described above, adjusted for the fair values of Ambac’s financial guarantees associated with the VIE. The fair value of financial guarantees consist of: (i) estimated future premium cash flows discounted at a rate consistent with

that implicit in the fair value of the VIE’s liabilities and (ii) estimates of future claim payments discounted at a rate that includes Ambac’s own credit risk. Estimated future premium payments to be paid by the VIEs were discounted at a weighted average rate of 6.3% and 6.8% at March 31, 2023 and December

31, 2022, respectively. At March 31, 2023, the range of these discount rates was between 5.5% and 7.3%. At December 31, 2022, the range of these discount rates were between 5.8% and 8.5%.

Additional Fair Value Information for Financial Assets and Liabilities Accounted for at Fair Value:

The following tables present the changes in the Level 3 fair value category for the periods presented in 2023 and 2022. Ambac classifies financial instruments in Level 3 of the fair value hierarchy when there is reliance on at least one significant unobservable input to the valuation model. In addition to these unobservable inputs, the valuation models for Level 3 financial instruments typically also rely on a number of inputs that are readily observable either directly or indirectly. Thus, the gains and losses presented below include changes in the fair value related to both observable and unobservable inputs.

Level 3 - Financial Assets and Liabilities Accounted for at Fair Value
					VIE Assets
	Investments		Derivatives		Investments		Loans		Total
Three Months Ended March 31, 2023:
Balance, beginning of period	$	79	$	26	$	1,828	$	1,829	$	3,762
Total gains/(losses) realized and unrealized:
Included in earnings	—		5		133		59		196
Included in other comprehensive income	3		—		43		42		87
Settlements	—		—		—		(73)		(74)
Balance, end of period	$	81	$	31	$	2,003	$	1,856	$	3,972
The amount of total gains/(losses) included in earnings attributable to the change in unrealized gains or losses relating to assets and liabilities still held at the reporting date	$	—	$	5	$	133	$	59	$	196
The amount of total gains/(losses) included in other comprehensive income attributable to the change in unrealized gains or losses relating to assets and liabilities still held at the reporting date	$	3	$	—	$	43	$	42	$	87
Three Months Ended March 31, 2022:
Balance, beginning of period	$	91	$	70	$	3,320	$	2,718	$	6,199
Total gains/(losses) realized and unrealized:
Included in earnings	—		(17)		(93)		(96)		(204)
Included in other comprehensive income	(4)		—		(96)		(76)		(176)
Settlements	(1)		(2)		—		(78)		(80)
Balance, end of period	$	86	$	52	$	3,131	$	2,469	$	5,738
The amount of total gains/(losses) included in earnings attributable to the change in unrealized gains or losses relating to assets and liabilities still held at the reporting date	$	—	$	(17)	$	(93)	$	(96)	$	(204)
The amount of total gains/(losses) included in other comprehensive income attributable to the change in unrealized gains or losses relating to assets and liabilities still held at the reporting date	$	(4)	$	—	$	(96)	$	(76)	$	(176)

Invested assets and VIE long-term debt are transferred into Level 3 when internal valuation models that include significant unobservable inputs are used to estimate fair value. All such securities that have internally modeled fair values have been classified as Level 3. Derivative instruments are transferred into Level 3 when the use of unobservable inputs becomes significant to the overall valuation. There were no transfers of financial instruments into or out of Level 3 in the periods disclosed.

Gains and losses (realized and unrealized) relating to Level 3 assets and liabilities included in earnings for the affected periods are reported as follows:

	Three Months Ended March 31, 2023								Three Months Ended March 31, 2022
	Net Investment Income		Net Gains (Losses) on Derivative Contracts		Income (Loss)  on Variable Interest Entities		Other Income or  (Expense)		Net Investment Income		Net Gains (Losses) on Derivative Contracts		Income (Loss)  on Variable Interest Entities		Other Income or  (Expense)
Total gains (losses) included in earnings for the period	$	—	$	5	$	191	$	—	$	—	$	(17)	$	(188)	$	—
Changes in unrealized gains (losses) relating to financial instruments still held at the reporting date	—		5		191		—		—		(17)		(188)		—

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Derivative Instruments

3 Months Ended

Mar. 31, 2023

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Instruments

7.    DERIVATIVE INSTRUMENTS

The following tables summarize the gross fair values of individual derivative instruments and the impact of legal rights of offset as reported in the Consolidated Balance Sheets as of March 31, 2023 and December 31, 2022:

	March 31, 2023										December 31, 2022
	Gross Amounts of Recognized Assets / Liabilities		Gross Amounts Offset in the Consolidated Balance Sheet		Net Amounts of Assets/ Liabilities Presented in the Consolidated Balance Sheet		Gross Amount of Collateral Received / Pledged Not Offset in the Consolidated Balance  Sheet		Net Amount		Gross Amounts of Recognized Assets / Liabilities		Gross Amounts Offset in the Consolidated Balance Sheet		Net Amounts of Assets/ Liabilities Presented in the Consolidated Balance Sheet		Gross Amount of Collateral Received / Pledged Not Offset in the Consolidated Balance  Sheet		Net Amount
Derivative Assets:
Interest rate swaps	$	30	$	—	$	30	$	—	$	30	$	27	$	—	$	27	$	—	$	27
Warrants	1		—		1		—		1		1		—		1		—		1
Total non-VIE derivative assets	$	31	$	—	$	31	$	—	$	31	$	28	$	—	$	27	$	—	$	27
Derivative Liabilities:
Interest rate swaps	$	44	$	—	$	44	$	43	$	—	$	38	$	—	$	38	$	38	$	—
Total non-VIE derivative liabilities	$	44	$	—	$	44	$	43	$	—	$	38	$	—	$	38	$	38	$	—
Variable Interest Entities Derivative Assets:
Interest rate swaps	$	198	$	—	$	198	$	198	$	—	$	190	$	—	$	190	$	—	$	190
Currency swaps	45		—		45		45		—		49		—		49		—		49
Total VIE derivative assets	$	243	$	—	$	243	$	243	$	—	$	239	$	—	$	239	$	—	$	239
Variable Interest Entities Derivative Liabilities:
Interest rate swaps	$	1,174	$	—	$	1,174	$	—	$	1,174	$	1,048	$	—	$	1,048	$	—	$	1,048
Total VIE derivative liabilities	$	1,174	$	—	$	1,174	$	—	$	1,174	$	1,048	$	—	$	1,048	$	—	$	1,048

Amounts representing the right to reclaim cash collateral or the obligation to return cash collateral are not offset against fair value amounts recognized for derivative instruments on the Unaudited Consolidated Balance Sheets. The amounts representing the right to reclaim cash collateral and posted margin, recorded in “Other assets” were $9 and $6 as of March 31, 2023 and December 31, 2022, respectively. Amounts representing an obligation to return cash collateral were $254 and $0 as of March 31, 2023 and December 31, 2022, respectively and are reported in "Variable interest entity liabilities: Other liabilities".

The following tables summarize the location and amount of gains and losses of derivative contracts in the Unaudited Consolidated Statements of Total Comprehensive Income (Loss) for the three months ended March 31, 2023 and 2022:

	Location of Gain (Loss) Recognized in Consolidated Statements of Total Comprehensive Income (Loss)	Amount of Gain (Loss) Recognized in Consolidated Statement of Total Comprehensive Income (Loss)
		Three Months Ended March 31,
		2023		2022
Non-VIE derivatives:
Interest rate swaps	Net gains (losses) on derivative contracts	(3)		30
Warrants	Net gains (losses) on derivative contracts	—		—
Futures contracts	Net gains (losses) on derivative contracts	—		27
Total Non-VIE derivatives		$	(4)	$	57
Variable Interest Entities:
Currency swaps	Income (loss) on variable interest entities	$	(99)	$	6
Interest rate swaps	Income (loss) on variable interest entities	(3)		5
Total Variable Interest Entities		(102)		11
Total derivative contracts		$	(105)	$	68

Interest Rate Derivatives:

Ambac, through its subsidiary Ambac Financial Services (“AFS”), uses interest rate swaps, US Treasury futures contracts and other derivatives, to provide a partial economic hedge against the effects of rising interest rates elsewhere in the Legacy Financial Guarantee Insurance segment, including on Ambac’s financial guarantee exposures. Additionally, AFS provided interest rate swaps to states, municipalities and their authorities, asset-backed issuers and other entities in connection with their

financings. As of March 31, 2023 and December 31, 2022, the notional amounts of AFS’s derivatives are as follows:

	Notional
Type of Derivative	March 31, 2023		December 31, 2022
Interest rate swaps—pay-fixed/receive-variable	$	861	$	989
Interest rate swaps—receive-fixed/pay-variable	332		337

Other Derivatives:

As of March 31, 2023 Ambac holds warrants to purchase preferred stock of a development stage company.

Derivatives of Consolidated Variable Interest Entities

Certain VIEs consolidated under the Consolidation Topic of the ASC entered into derivative contracts to meet specified purposes within the securitization structure. The notional for VIE derivatives outstanding as of March 31, 2023 and December 31, 2022, were as follows:

	Notional
Type of VIE Derivative	March 31, 2023		December 31, 2022
Interest rate swaps—receive-fixed/pay-variable	$	1,609	$	1,573
Interest rate swaps—pay-fixed/receive-variable	890		887
Currency swaps	169		176

Contingent Features in Derivatives Related to Ambac Credit Risk

Ambac’s over-the-counter interest rate swaps are centrally cleared when eligible. Certain interest rate swaps remain with professional swap-dealer counterparties and direct customer counterparties. These non-cleared swaps are generally executed under standardized derivative documents including collateral support and master netting agreements. Under these agreements, Ambac is required to post collateral in the event net unrealized losses exceed predetermined threshold levels. Additionally, given that AAC is no longer rated by an independent rating agency, counterparties have the right to terminate the swap positions.

As of March 31, 2023 and December 31, 2022, the net liability fair value of derivative instruments with contingent features linked to Ambac’s own credit risk was $43 and $38, respectively, related to which Ambac had posted cash and securities as collateral with a fair value of $58 and $54, respectively. All such ratings-based contingent features have been triggered requiring maximum collateral levels to be posted by Ambac while preserving counterparties’ rights to terminate the contracts. Assuming all such contracts terminated at fair value on March 31, 2023, settlement of collateral balances and net derivative liabilities would result in a net receipt of cash and/or securities by Ambac. If counterparties elect to exercise their right to terminate, the actual termination payment amounts will be determined in accordance with derivative contract terms, which may result in amounts that differ from market values as reported in Ambac’s financial statements.

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Intangible Assets

3 Months Ended

Mar. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets Disclosure [Text Block]

8.    GOODWILL AND INTANGIBLE ASSETS

See Note 2. Basis of Presentation and Significant Accounting Policies for discussion of goodwill. The following table presents the Company's goodwill.

	March 31, 2023		December 31, 2022
Beginning balance	$	61	$	46
Business acquisitions	—		15
Impairments	—		—
Ending balance	$	61	$	61

Intangible assets and accumulated amortization are included in the Consolidated Balance Sheets, as shown below.

	March 31, 2023		December 31, 2022
Finite-lived Intangible Assets:
Insurance intangible:
Gross carrying value	$	1,251	$	1,247
Accumulated amortization	990		981
Net insurance intangible asset	261		266
Other intangibles:
Gross carrying value	52		52
Accumulated amortization	7		6
Net other intangible assets	46		47
Total finite-lived intangible assets	307		312
Indefinite-lived Intangible Assets:
Insurance licenses	14		14
Total intangible assets	$	321	$	326

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Revenue Recognition and Deferred Revenue

3 Months Ended

Mar. 31, 2023

Revenue Recognition and Deferred Revenue [Abstract]

Revenue from Contract with Customer

The following table presents the Insurance Distribution business operations revenues recognized in accordance with the Revenue from Contracts with Customers Topic of the ASC disaggregated by policy type for the affected periods:

Three Months Ended March 31,	2023		2022
Employer Stop Loss	$	5	$	4
Affinity Products	5		5
Commercial auto	3		—
Other	1		—
Total	$	15	$	9

During the three months ended March 31, 2023 and 2022, the amount of revenue recognized related to performance obligations satisfied in a previous period, inclusive of changes due to estimates was approximately $3 and $4, respectively.

Contract Assets and Liabilities

The balances of contract assets and contract liabilities with customers were as follows:

	March 31, 2023		December 31, 2022
Premiums and commissions receivable	$	8	$	7
Contract assets	10		5
Contract liabilities	1		1

Contract assets represent estimated future consideration related to base commissions and profit-sharing commissions that were recognized as revenue upon the placement of the policy. The Company does not have the right to bill or collect payment on i) base commissions until the related premiums from policyholders has been collected nor ii) profit-sharing commissions until after the contract year is completed. Changes in contract assets during the three months ended March 31, 2023, is primarily due to the timing of new or renewal policies, growth in the business, reclassifications to receivables (unconditional right) and collections. Contract liabilities represent advance consideration received from customers related to employer stop loss base commissions that will be recognized over time as claims servicing is performed, which typically occurs between 17 and 20 months from contract inception. During the three months ended March 31, 2023 and 2022, the Company recognized revenue that was included in the contract liability balance as of the beginning of the period of $0 and $1, respectively.

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Comprehensive Income

3 Months Ended

Mar. 31, 2023

Equity [Abstract]

Comprehensive Income

11.    COMPREHENSIVE INCOME

The following tables detail the changes in the balances of each component of accumulated other comprehensive income for the affected periods:

	Three Months Ended March 31, 2023:										Three Months Ended March 31, 2022:
	Unrealized Gains (Losses) on Available for Sale Securities (1)		Amortization of Postretirement Benefit (1)		Gain (Loss) on Foreign  Currency Translation (1)		Credit Risk Changes of Fair Value Option Liabilities  (1) (2)		Total		Unrealized Gains (Losses) on Available for Sale Securities (1)		Amortization of Postretirement Benefit (1)		Gain (Loss) on Foreign  Currency Translation (1)		Credit Risk Changes of Fair Value Option Liabilities  (1) (2)		Total
Beginning Balance	$	(71)	$	3	$	(184)	$	(1)	$	(253)	$	154	$	4	$	(100)	$	(1)	$	58
Other comprehensive income (loss) before reclassifications	14		3		16		—		33		(104)		—		(23)		—		(127)
Amounts reclassified from accumulated other comprehensive income (loss)	4		—		—		—		3		(1)		—		—		—		(1)
Net current period other comprehensive income (loss)	17		3		16		—		36		(105)		—		(23)		—		(127)
Ending Balance	$	(54)	$	6	$	(168)	$	(1)	$	(217)	$	49	$	4	$	(123)	$	(1)	$	(70)

(1)All amounts are net of tax and noncontrolling interest. Amounts in parentheses indicate reductions to Accumulated Other Comprehensive Income.

(2)Represents the changes in fair value attributable to instrument-specific credit risk of liabilities for which the fair value option is elected.

The following table details the significant amounts reclassified from each component of accumulated other comprehensive income, shown in the above rollforward tables, for the affected periods:

Details about Accumulated Other Comprehensive Income Components	Amount Reclassified from  Accumulated Other Comprehensive Income				Affected Line Item in the Consolidated Statement of Total Comprehensive Income (Loss)
	Three Months Ended March 31,
	2023		2022
Unrealized Gains (Losses) on Available-for-Sale Securities
	$	4	$	(1)	Net realized investment gains (losses)
	(1)		—		Provision for income taxes
	$	4	$	(1)	Net of tax and noncontrolling interest
Amortization of Postretirement Benefit
Prior service cost	$	—	$	—	Other income
Actuarial (losses)	—		—		Other income
	—		—		Total before tax
	—		—		Provision for income taxes
	$	—	$	—	Net of tax and noncontrolling interest
Credit Risk Changes of Fair Value Option Liabilities
	$	—	$	1	Credit risk changes of fair value option liabilities
	—		—		Provision for income taxes
	$	—	$	—	Net of tax and noncontrolling interest
Total reclassifications for the period	$	3	$	(1)	Net of tax and noncontrolling interest

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Net Income Per Share

3 Months Ended

Mar. 31, 2023

Earnings Per Share [Abstract]

Net Income Per Share

12.    NET INCOME PER SHARE

As of March 31, 2023, 45,321,745 shares of AFG's common stock (par value $0.01) and warrants entitling holders to acquire up to 4,876,114 shares of new common stock at an exercise price of $16.67 per share were issued and outstanding. Common shares outstanding increased by 347,988 during the three months ended March 31, 2023, primarily due settlements of employee restricted and performance stock units. As of April 30, 2023, all of AFG's outstanding warrants expired without being exercised.

Earnings Per Share Calculation

The numerator of the basic and diluted earnings per share computation represents net income (loss) attributable to common stockholders adjusted by the retained earnings impact of the noncontrolling adjustment to redemption value under ASC 480. The redemption value adjustment is further described in the Redeemable Noncontrolling Interest section of Note 2. Basis of Presentation and Significant Accounting Policies.

The following table provides a reconciliation of net income attributable to common stockholders to the numerator in the basic and diluted earnings per share calculation, together with the resulting earnings per share amounts:

Three Months Ended March 31,	2023		2022
Net income (loss) attributable to common stockholders	$	(33)	$	2
Adjustment to redemption value (ASC 480)	—		—
Numerator of basic and diluted EPS	$	(33)	$	2
Per Share:
Basic	$	(0.73)	$	0.04
Diluted	$	(0.73)	$	0.04

The denominator of the basic earnings per share computation represents the weighted average common shares outstanding plus vested restricted stock units (together, "Basic Weighted Average Shares Outstanding"). The denominator of diluted earnings per share adjusts the Basic Weighted Average Shares Outstanding for all potential dilutive common shares outstanding during the period. All potential dilutive common shares outstanding consider common stock deliverable pursuant to warrants, unvested restricted stock units and performance stock units granted under existing compensation plans.

The following table provides a reconciliation of the weighted average shares denominator used for basic net income per share to the denominator used for diluted net income per share:

Three Months Ended March 31,	2023	2022
Basic weighted average shares outstanding denominator	45,564,276	46,731,459
Effect of potential dilutive shares :
Warrants	—	—
Restricted stock units	—	82,066
Performance stock units (1)	—	546,206
Diluted weighted average shares outstanding denominator	45,564,276	47,359,731
Anti-dilutive shares excluded from the above reconciliation:
Warrants	4,876,114	4,877,617
Restricted stock units	555,354	253,828
Performance stock units (1)	601,033	—

(1)    Performance stock units are reflected based on the performance metrics through the balance sheet date. Vesting of these units is contingent upon meeting certain performance metrics. Although a portion of these performance metrics have been achieved as of the respective period end, it is possible that awards may no longer meet the metric at the end of the performance period.

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Income Taxes

3 Months Ended

Mar. 31, 2023

Income Tax Disclosure [Abstract]

Income Taxes

13.    INCOME TAXES

AFG files a consolidated Federal income tax return with its subsidiaries. AFG and its subsidiaries also file separate or combined income tax returns in various states, local and foreign jurisdictions. The following are the major jurisdictions in which Ambac and its subsidiaries operate and the earliest tax years subject to examination:

Jurisdiction	Tax Year
United States	2010
New York State	2013
New York City	2018
United Kingdom	2019
Italy	2018

In accordance with the Income Tax Topic of the ASC, a valuation allowance is recognized if, based on the weight of available evidence, it is more-likely-than-not that some, or all, of the deferred tax asset will not be realized. As a result of the risks and uncertainties associated with future operating results, management believes it is more likely than not that the Company will not generate sufficient U.S. federal, state and/or local taxable income to recover its deferred tax operating assets and therefore maintains a full valuation allowance.

Consolidated Pretax Income (Loss)

U.S. and foreign components of pre-tax income (loss) were as follows:

Three Months Ended March 31,	2023		2022
U.S.	$	(48)	$	(1)
Foreign	19		4
Total	$	(29)	$	3

Provision (Benefit) for Income Taxes

The components of the provision for income taxes were as follows:

Three Months Ended March 31,	2023		2022
Current taxes
U. S. federal	$	—	$	—
U.S. state and local	—		—
Foreign	2		1
Total Current taxes	2		2
Deferred taxes
Foreign	2		(1)
Total Deferred taxes	2		(1)
Provision for income taxes	$	4	$	—

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2023

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

14.    COMMITMENTS AND CONTINGENCIES

The following commitments and contingencies provide an update of those discussed in Note 20: Commitments and Contingencies in the Notes to Consolidated Financial Statements included Part II, Item 8 in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022, and should be read in conjunction with the complete descriptions provided in the aforementioned Form 10-K.

Litigation Against Ambac

In re National Collegiate Student Loan Trusts Litigation (Delaware Court of Chancery, Consolidated C.A. No. 12111, filed November 1, 2019). The Vice Chancellor has entered a series of stays to facilitate good-faith settlement discussions, the most recent of which was entered on May 2, 2023 and stays the matter through May 5, 2023.

It is not reasonably possible to predict whether additional suits will be filed or whether additional inquiries or requests for information will be made, and it is also not possible to predict the outcome of litigation, inquiries or requests for information. It is possible that there could be unfavorable outcomes in these or other proceedings. Legal accruals for litigation against the Company which are probable and reasonably estimable, and management's estimated range of loss for such matters, are either not applicable or are not material to the operating results or financial position of the Company. For the litigation matters the Company is defending that do not meet the “probable and reasonably estimable” accrual threshold and where no loss estimates have been provided above, management is unable to make a meaningful estimate of the amount or range of loss that could result from unfavorable outcomes. Under some circumstances, adverse results in any such proceedings could be material to our business, operations, financial position, profitability or cash flows. The Company believes that it has substantial defenses to the claims above and, to the extent that these actions proceed, the Company intends to defend itself

vigorously; however, the Company is not able to predict the outcomes of these actions.

Litigation Filed or Joined by Ambac

In the ordinary course of their businesses, certain of Ambac’s subsidiaries assert claims in legal proceedings against third parties to recover losses already paid and/or mitigate future losses. The amounts recovered and/or losses avoided which may result from these proceedings is uncertain, although recoveries and/or losses avoided in any one or more of these proceedings during any quarter or fiscal year could be material to Ambac’s results of operations in that quarter or fiscal year.

Puerto Rico

In re Financial Oversight and Management Board for Puerto Rico (United States District Court, District of Puerto Rico, No. 1:17- bk-03283) (appeals of the Commonwealth Plan). On January 18, 2022, the District Court entered an order confirming the Commonwealth Plan and entered its findings of fact and conclusions of law related thereto. Several parties filed notices of appeal of the District Court’s confirmation order to the First Circuit Court of Appeals, including a number of teachers’ unions (“the Teachers’ Unions”), the Oversight Board, certain individual creditors, a number of credit unions (“the Credit Unions”), and Suiza Dairy Corporation (“Suiza”). Oversight Board: On July 18, 2022, the First Circuit rejected the Oversight Board’s challenges to, and affirmed, the confirmation order. The Oversight Board filed a petition for a writ of certiorari seeking Supreme Court review of the First Circuit’s decision in its appeal of the confirmation order on October 17, 2022; the Supreme Court denied the Oversight Board’s petition on February 21, 2023.

In re Financial Oversight and Management Board for Puerto Rico (United States District Court, District of Puerto Rico, No. 1:17- bk-03567) (appeal of the PRHTA POA). On October 12, 2022, the District Court entered an order confirming the PRHTA POA and entered its findings of fact and conclusions of law related thereto. On October 24, 2022, a group of present and former employees of PRHTA (“the Vazquez-Velazquez Group”) filed a notice of appeal with respect to, and a motion to stay, the PRHTA POA confirmation order. The Vazquez-Velazquez Group filed its opening brief in the First Circuit on February 15, 2023. The Oversight Board filed its response brief on March 29, 2023. On April 14, 2023, the First Circuit entered an order extending the Vazquez-Velazquez Group’s deadline to file its reply brief to May 4, 2023. Oral argument is scheduled for June 8, 2023.

Student Loans Exposure

CFPB v. Nat’l Collegiate Master Student Loan Trust (United States District Court, District of Delaware, Case No. 1:17-cv-01323, filed September 18, 2017). The Third Circuit is scheduled to hear oral argument in the matter on May 17, 2023.

RMBS Litigation

In connection with AAC’s efforts to seek redress for breaches of representations and warranties and fraud related to the information provided by both the underwriters and the sponsors of various transactions and for failure to comply with the

obligation by the sponsors to repurchase ineligible loans, AAC has filed various lawsuits:

•    Ambac Assurance Corporation v. U.S. Bank National Association (United States District Court, Southern District of New York, Docket No. 17-cv-02614, filed April 11, 2017). On October 18, 2022, the Court set a schedule for additional summary judgment briefing, which was concluded on February 10, 2023, and to be followed by briefing on AAC’s proposed use of statistical sampling before proceeding with Phase 2 discovery. Oral argument relating to the additional summary judgment briefing is scheduled to be held on June 5, 2023.

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Basis of Presentation and Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2023

Accounting Policies [Abstract]

Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block]

Consolidation: The consolidated financial statements include the accounts of AFG and all other entities in which AFG (directly or through its subsidiaries) has a controlling financial interest, including variable interest entities (“VIEs”) for which AFG or an AFG subsidiary is deemed the primary beneficiary in accordance with the Consolidation Topic of the Accounting Standards Codification ("ASC"). All significant intercompany balances have been eliminated. See Note 9. Variable Interest Entities, for a detailed discussion of Ambac’s involvement in VIEs, Ambac’s methodology for determining whether Ambac is required to consolidate a VIE and the effects of VIEs being consolidated and deconsolidated.

Basis of Presentation and Significant Accounting Policies [Text Block]

Basis of Presentation:

The accompanying unaudited consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles ("GAAP") for interim financial reporting and with the instructions to Form 10-Q and Article 10 of

Regulation S-X. Accordingly, they do not include all of the information and disclosures required by GAAP for annual periods. These consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Annual Report on Form 10-K for the year ended December 31, 2022. The accompanying consolidated financial statements have not been audited by an independent registered public accounting firm in accordance with the standards of the Public Company Accounting Oversight Board (U.S.), but in the opinion of management such financial statements include all adjustments necessary for the fair presentation of the Company’s consolidated financial position and results of operations. The results of operations for the three months ended March 31, 2023, may not be indicative of the results that may be expected for the year ending December 31, 2023. The December 31, 2022, consolidated balance sheet was derived from audited financial statements.The preparation of financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. As additional information becomes available or actual amounts become determinable, the recorded estimates are revised and reflected in operating results.

Foreign Currency Transactions and Translations Policy [Policy Text Block]

Foreign Currency:The impact of non-functional currency transactions and the remeasurement of non-functional currency assets and liabilities into the respective subsidiaries' functional currency (collectively "foreign currency transactions gains/(losses)") are $(2) and $1 for the three months ended March 31, 2023 and 2022, respectively. Foreign currency transactions gains/(losses) are primarily the result of remeasuring Ambac UK's assets and liabilities denominated in currencies (primarily the U.S. dollar and the Euro) other than its functional currency (the British Pound Sterling).

Noncontrolling Interest Disclosure

Redeemable Noncontrolling Interest:

The All Trans, Capacity Marine and Xchange acquisitions, further described in the in the Notes to Consolidated Financial Statements included in Part II, Item 8 in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022, resulted in 85%, 80% and 80%, respectively, ownership of the acquired entities by Ambac. Under the terms of the acquisition agreements, Ambac has call options to purchase the remaining 15%, 20% and 20%, respectively, from the minority owners (i.e., noncontrolling interests) and the minority owners have put options to sell the remaining 15%, 20% and 20%, respectively, to Ambac. Because the exercise of the put options are outside the control of Ambac, in accordance with the Distinguishing Liabilities from Equity Topic of the ASC, Ambac reports redeemable noncontrolling interests in the mezzanine section of its consolidated balance sheet.

The redeemable noncontrolling interest is remeasured each period as the greater of:

i.the carrying value under ASC 810, which attributes a portion of consolidated net income (loss) to the redeemable noncontrolling interest, and

ii.the redemption value of the put option under ASC 480 as if it were exercisable at the end of the reporting period.

Any increase (decrease) in the carrying amount of the redeemable noncontrolling interest as a result of adjusting to the redemption value of the put option is recorded as an offset to retained earnings. The impact of such differences on earnings per share are presented in Note 12. Net Income Per Share.

Following is a rollforward of redeemable noncontrolling interest.

Three Months Ended March 31,	2023		2022
Beginning balance	$	20	$	18
Net income attributable to redeemable noncontrolling interest (ASC 810)	—		—
Adjustment to redemption value (ASC 480)	—		—
Ending balance	$	20	$	18

Reclassifications

Reclassifications and Rounding

Reclassifications may have been made to prior years' amounts to conform to the current year's presentation. Certain amounts and tables in the consolidated financial statements and associated notes may not add due to rounding.

New Accounting Pronouncements, Policy [Policy Text Block]

Adopted Accounting Standards:

There have been no new accounting standards adopted during 2023.

Future Application of Accounting Standards:

Noncontrolling Interest Policy

Redeemable Noncontrolling Interest:

The All Trans, Capacity Marine and Xchange acquisitions, further described in the in the Notes to Consolidated Financial Statements included in Part II, Item 8 in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022, resulted in 85%, 80% and 80%, respectively, ownership of the acquired entities by Ambac. Under the terms of the acquisition agreements, Ambac has call options to purchase the remaining 15%, 20% and 20%, respectively, from the minority owners (i.e., noncontrolling interests) and the minority owners have put options to sell the remaining 15%, 20% and 20%, respectively, to Ambac. Because the exercise of the put options are outside the control of Ambac, in accordance with the Distinguishing Liabilities from Equity Topic of the ASC, Ambac reports redeemable noncontrolling interests in the mezzanine section of its consolidated balance sheet.

The redeemable noncontrolling interest is remeasured each period as the greater of:

i.the carrying value under ASC 810, which attributes a portion of consolidated net income (loss) to the redeemable noncontrolling interest, and

ii.the redemption value of the put option under ASC 480 as if it were exercisable at the end of the reporting period.

Any increase (decrease) in the carrying amount of the redeemable noncontrolling interest as a result of adjusting to the redemption value of the put option is recorded as an offset to retained earnings. The impact of such differences on earnings per share are presented in Note 12. Net Income Per Share.

Following is a rollforward of redeemable noncontrolling interest.

Three Months Ended March 31,	2023		2022
Beginning balance	$	20	$	18
Net income attributable to redeemable noncontrolling interest (ASC 810)	—		—
Adjustment to redemption value (ASC 480)	—		—
Ending balance	$	20	$	18

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Segment Reporting (Policies)	3 Months Ended
	Mar. 31, 2023
Segment Reporting [Abstract]
Segment Reporting, Policy	The Company reports its results of operations in three segments: Legacy Financial Guarantee Insurance, Specialty Property and Casualty Insurance and Insurance Distribution, separate from Corporate and Other, which is consistent with the manner in which the Company's chief operating decision maker ("CODM") reviews the business to assess performance and allocate resources.

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Basis of Presentation and Significant Accounting Policies Supplemental Cash Flow Information (Tables)

3 Months Ended

Mar. 31, 2023

Supplemental Cash Flow Elements [Abstract]

Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]

Supplemental Disclosure of Cash Flow Information	Three Months Ended March 31,
	2023		2022
Cash paid during the period for:
Income taxes	$	4	$	2
Interest on long-term debt	50		15
Non-cash investing and financing activities:
Exchange of investments in Puerto Rico bonds for new securities issued in the restructuring transactions	$	—	$	185
Securities acquired (transferred) in transactions related to Puerto Rico restructurings	(1)		—
	March 31,
	2023		2022
Reconciliation of cash, cash equivalents, and restricted cash reported within the Consolidated Balance Sheets to the Consolidated Statements of Cash Flows:
Cash and cash equivalents	$	38	$	60
Restricted cash	10		7
Variable Interest Entity restricted cash	256		49
Total cash, cash equivalents, and restricted cash shown on the Consolidated Statements of Cash Flows	$	304	$	116

Restricted cash is cash that we do not have the right to use for general purposes and includes fiduciary cash held by Ambac's insurance distribution subsidiaries and consolidated variable interest entity cash to support the obligations of the consolidated VIEs and cash received as collateral under their derivatives agreements.

Redeemable Noncontrolling Interest

Following is a rollforward of redeemable noncontrolling interest.

Three Months Ended March 31,	2023		2022
Beginning balance	$	20	$	18
Net income attributable to redeemable noncontrolling interest (ASC 810)	—		—
Adjustment to redemption value (ASC 480)	—		—
Ending balance	$	20	$	18

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Investments (Tables)

3 Months Ended

Mar. 31, 2023

Investments, Debt and Equity Securities [Abstract]

Summary of Amortized Cost and Estimated Fair Value of Available-for-Sale Investments, Excluding VIE Investments Held by Successor Ambac, by Contractual Maturity

The amortized cost and estimated fair value of available-for-sale investments, excluding VIE investments, at March 31, 2023, by contractual maturity, were as follows:

	Amortized Cost		Estimated Fair Value
Due in one year or less	$	486	$	485
Due after one year through five years	536		508
Due after five years through ten years	297		268
Due after ten years	53		47
	1,371		1,307
Residential mortgage-backed securities	231		240
Commercial mortgage-backed securities	15		15
Collateralized debt obligations	140		137
Other asset-backed securities	226		223
Total	$	1,983	$	1,923

Summary of Gross Unrealized Losses and Fair Values of Ambac's Available-for-Sale Investments

The following table shows gross unrealized losses and fair values of Ambac’s available-for-sale investments, excluding VIE investments, which at March 31, 2023 and December 31, 2022, did not have an allowance for credit losses under the CECL standard. This information is aggregated by investment category and length of time that the individual securities have been in a continuous unrealized loss position, at March 31, 2023 and December 31, 2022:

	March 31, 2023												December 31, 2022
	Less Than 12 Months				12 Months or More				Total				Less Than 12 Months				12 Months or More				Total
	Fair  Value		Gross Unrealized Loss		Fair  Value		Gross Unrealized Loss		Fair  Value		Gross Unrealized Loss		Fair  Value		Gross Unrealized Loss		Fair  Value		Gross Unrealized Loss		Fair  Value		Gross Unrealized Loss
Fixed maturity securities:
Municipal obligations	$	1	$	—	$	17	$	2	$	17	$	2	$	21	$	1	$	7	$	1	$	28	$	2
Corporate obligations	237		7		393		47		630		54		280		21		279		42		559		63
Foreign obligations	19		1		53		7		72		8		27		2		47		7		73		9
U.S. government obligations	19		1		38		2		57		3		40		3		19		1		58		4
Residential mortgage-backed securities	120		14		12		2		132		16		132		19		—		—		132		19
Commercial mortgage-backed securities	3		—		—		—		3		—		3		—		—		—		3		—
Collateralized debt obligations	10		—		115		3		125		3		90		3		36		1		126		4
Other asset-backed securities	105		4		6		1		111		5		198		4		5		1		203		5
	513		27		634		63		1,147		90		791		53		392		53		1,183		106
Short-term	12		—		2		—		14		—		78		—		8		—		86		—
Total temporarily impaired securities	$	525	$	27	$	636	$	63	$	1,161	$	90	$	869	$	53	$	400	$	53	$	1,269	$	106

Summary of Amounts Included in Net Realized (Losses) Gains and Other-Than-Temporary Impairments

The following table details amounts included in net investment gains (losses) and impairments included in earnings for the affected periods:

Three Months Ended March 31,	2023		2022
Gross realized gains on securities	$	—	$	23
Gross realized losses on securities	(2)		(15)
Foreign exchange gains (losses)	(2)		3
Credit impairments	(1)		(1)
Intent / requirement to sell impairments	—		—
Net investment gains (losses), including impairments	$	(4)	$	10

Summary of Fair Value, Including Financial Guarantee, and Weighted-Average Underlying Rating, Excluding Financial Guarantee, of Insured Securities

The following table represents the fair value and weighted-average underlying rating of insured securities in Ambac's investment portfolio at March 31, 2023 and December 31, 2022, respectively: 

	March 31, 2023:							December 31, 2022:
	Municipal Obligations		Mortgage and Asset- backed Securities		Total		Weighted Average Underlying Rating (1)	Municipal Obligations		Mortgage and Asset- backed Securities		Total		Weighted Average Underlying Rating (1)
Ambac Assurance Corporation	$	10	$	392	$	401	B-	$	10	$	394	$	403	B
Total	$	10	$	392	$	401	B-	$	10	$	394	$	403	B

(1)Ratings are based on the lower of Standard & Poor’s or Moody’s rating. If unavailable, Ambac’s internal rating is used.

Equity Method Investments [Table Text Block]

In addition to these investments, Ambac has unfunded commitments of $57 to private credit and private equity funds at March 31, 2023.

	Fair Value
Class of Funds	March 31, 2023		December 31, 2022		Redemption Frequency	Redemption Notice Period
Hedge funds (1)	$	178	$	186	quarterly or semi-annually	90 days
Private credit (2)	87		84		quarterly if permitted	180 days if permitted
High yields and leveraged loans (3)	84		80		daily	0 - 30 days
Equity market investments (4) (10)	68		64		daily or quarterly	0 - 90 days
Investment grade floating rate income (5)	47		63		weekly	0 days
Private equity (6)	49		47		quarterly if permitted	90 days if permitted
Real estate properties (7)	22		22		quarterly	10 business days
Convertible bonds (8)(10)	9		8		daily	0 days
Insurance-linked investments (9)	1		1		see footnote (9)	see footnote (9)
Total equity investments in pooled funds	$	545	$	556

(1)This class seeks to generate superior risk-adjusted returns through selective asset sourcing, active trading and hedging strategies across a range of asset types.

(2)This class aims to obtain high long-term returns primarily through credit and preferred equity investments with low liquidity and defined term.

(3)This class of funds includes investments in a range of instruments including high-yield bonds, leveraged loans, CLOs, ABS and floating rate notes to generate income and capital appreciation.

(4)This class of funds aim to achieve long term growth through diversified exposure to global equity-markets.

(5)This class of funds includes investments in high quality floating rate debt securities including ABS and corporate floating rate notes.

(6)This class seeks to generate long-term capital appreciation through investments in private equity, equity-related and other instruments.

(7)Investments consist of UK property to generate income and capital growth.

(8)This class seeks to generate total returns from portfolios focused primarily on convertible securities.

(9)This class seeks to generate returns from insurance markets through investments in catastrophe bonds, life insurance and other insurance linked investments. This investment is restricted in connection with the unwind of certain insurance linked exposures. Ambac has redeemed its investment to the extent permitted by the fund.

(10)These categories include fair value amounts totaling $65 and $61 at March 31, 2023 and December 31, 2022, respectively, that are readily determinable and are priced through pricing vendors, including for Equity market investments $57 and $53 and Convertible bonds investments $9 and 8.

Summary of Net Investment Income

Net investment income (loss) was comprised of the following for the affected periods:

Three Months Ended March 31,	2023		2022
Fixed maturity securities	$	17	$	15
Short-term investments	6		—
Investment expense	(2)		(1)
Securities available-for-sale and short-term	21		14
Fixed maturity securities - trading	—		(9)
Other investments	13		—
Total net investment income (loss)	$	34	$	5

Debt Securities, Available-for-Sale

The amortized cost and estimated fair value of available-for-sale investments, excluding VIE investments, at March 31, 2023 and December 31, 2022, were as follows:

	March 31, 2023:										December 31, 2022:
	Amortized Cost		Allowance for Credit Losses (2)		Gross Unrealized				Estimated Fair Value		Amortized Cost		Allowance for Credit Losses		Gross Unrealized				Estimated Fair Value
					Gains		Losses								Gains		Losses
Fixed maturity securities:
Municipal obligations	$	58	$	—	$	1	$	2	$	57	$	44	$	—	$	—	$	2	$	43
Corporate obligations	732		—		1		54		679		659		—		1		63		598
Foreign obligations	86		—		—		8		79		85		—		—		9		76
U.S. government obligations	66		—		—		3		63		68		—		—		4		65
Residential mortgage-backed securities	231		1		26		16		240		230		—		28		19		238
Commercial mortgage-backed securities	15		—		—		—		15		15		—		—		—		15
Collateralized debt obligations	140		—		—		3		137		141		—		—		4		137
Other asset-backed securities (1)	226		—		3		5		223		227		—		2		5		224
	1,554		1		31		90		1,494		1,469		—		31		106		1,395
Short-term	367		—		—		—		367		507		—		—		—		507
	1,922		1		31		90		1,862		1,977		—		31		106		1,902
Fixed maturity securities pledged as collateral:
Short-term	61		—		—		—		61		64		—		—		—		64
	61		—		—		—		61		64		—		—		—		64
Total available-for-sale investments	$	1,983	$	1	$	31	$	90	$	1,923	$	2,041	$	—	$	31	$	106	$	1,966

(1)Consists primarily of Ambac's holdings of military housing and student loan securities.

(2)For the three months ended March 31, 2023, the allowance for credit losses increased $1 on residential mortgage-backed securities on which credit losses were not previously recorded.

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Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2023

Fair Value Disclosures [Abstract]

Summary of Carrying Amount and Fair Value of Ambac's Financial Assets and Liabilities

The following table sets forth the carrying amount and fair value of Ambac’s financial assets and liabilities as of March 31, 2023 and December 31, 2022, including the level within the fair value hierarchy at which fair value measurements are categorized. As required by the Fair Value Measurement Topic of the ASC, financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement.

	March 31, 2023										December 31, 2022
	Carrying Amount		Total Fair Value		Fair Value Measurements Categorized as:						Carrying Amount		Total Fair Value		Fair Value Measurements Categorized as:
					Level 1		Level 2		Level 3						Level 1		Level 2		Level 3
Financial assets:
Fixed maturity securities:
Municipal obligations	$	86	$	86	$	—	$	86	$	—	$	102	$	102	$	—	$	102	$	—
Corporate obligations	679		679		—		667		13		598		598		—		585		12
Foreign obligations	79		79		79		—		—		76		76		76		—		—
U.S. government obligations	63		63		63		—		—		65		65		65		—		—
Residential mortgage-backed securities	240		240		—		240		—		238		238		—		238		—
Commercial mortgage-backed securities	15		15		—		15		—		15		15		—		15		—
Collateralized debt obligations	137		137		—		137		—		137		137		—		137		—
Other asset-backed securities	223		223		—		155		69		224		224		—		157		67
Fixed maturity securities, pledged as collateral:
Short-term	61		61		61		—		—		64		64		64		—		—
Short term investments	367		367		359		8		—		507		507		506		1		—
Other investments (1)	557		545		65		—		—		568		556		61		—		—
Cash, cash equivalents and restricted cash	40		40		38		2		—		44		44		43		1		—
Derivative assets:
Interest rate swaps—asset position	30		30		—		1		30		27		27		—		1		26
Warrants	1		1		—		—		1		1		1		—		—		1
Other assets-Loans	2		2		—		—		2		10		10		—		—		10
Variable interest entity assets:
Fixed maturity securities: Corporate obligations, fair value option	2,003		2,003		—		—		2,003		1,828		1,828		—		—		1,828
Fixed maturity securities: Municipal obligation, trading	16		16		—		16		—		43		43		—		43		—
Fixed maturity securities: Municipal obligations, available-for-sale	100		100		—		100		—		96		96		—		96		—
Restricted cash	256		256		256		—		—		17		17		17		—		—
Loans	1,856		1,856		—		—		1,856		1,829		1,829		—		—		1,829
Derivative assets: Interest rate swaps—asset position	198		198		—		198		—		190		190		—		190		—
Derivative assets: Currency swaps—asset position	45		45		—		45		—		49		49		—		49		—
Total financial assets	$	7,056	$	7,045	$	922	$	1,669	$	3,974	$	6,726	$	6,715	$	833	$	1,615	$	3,772
Financial liabilities:
Long term debt, including accrued interest	$	935	$	779	$	—	$	764	$	15	$	1,065	$	878	$	—	$	864	$	14
Derivative liabilities:
Interest rate swaps—liability position	44		44		—		44		—		38		38		—		38		—
Liabilities for net financial guarantees written (2)	318		668		—		—		668		159		476		—		—		476
Variable interest entity liabilities:
Long-term debt	3,060		3,053		—		2,937		116		3,107		3,145		—		2,992		154
Derivative liabilities: Interest rate swaps—liability position	1,174		1,174		—		1,174		—		1,048		1,048		—		1,048		—
Total financial liabilities	$	5,531	$	5,717	$	—	$	4,918	$	799	$	5,418	$	5,586	$	—	$	4,942	$	644

(1)Excluded from the fair value measurement categories in the table above are investment funds of $480 and $494 as of March 31, 2023 and December 31, 2022, respectively, which are measured using NAV as a practical expedient. Also excluded from the fair value amounts in the table above are equity securities with a carrying value of $12 and $12 as of March 31, 2023 and December 31, 2022, respectively, that do not have readily determinable fair values and have carrying amounts determined using the measurement alternative.

(2)The carrying value of net financial guarantees written includes financial guarantee amounts in the following balance sheet items: Premium receivables; Reinsurance recoverable on paid and unpaid losses; Deferred ceded premium; Subrogation recoverable; Insurance intangible asset; Unearned premiums; Loss and loss expense reserves; Ceded premiums payable, premiums taxes payable and other deferred fees recorded in Other liabilities.

Summary of Changes in Level 3 Fair Value Category

The following tables present the changes in the Level 3 fair value category for the periods presented in 2023 and 2022. Ambac classifies financial instruments in Level 3 of the fair value hierarchy when there is reliance on at least one significant unobservable input to the valuation model. In addition to these unobservable inputs, the valuation models for Level 3 financial instruments typically also rely on a number of inputs that are readily observable either directly or indirectly. Thus, the gains and losses presented below include changes in the fair value related to both observable and unobservable inputs.

Level 3 - Financial Assets and Liabilities Accounted for at Fair Value
					VIE Assets
	Investments		Derivatives		Investments		Loans		Total
Three Months Ended March 31, 2023:
Balance, beginning of period	$	79	$	26	$	1,828	$	1,829	$	3,762
Total gains/(losses) realized and unrealized:
Included in earnings	—		5		133		59		196
Included in other comprehensive income	3		—		43		42		87
Settlements	—		—		—		(73)		(74)
Balance, end of period	$	81	$	31	$	2,003	$	1,856	$	3,972
The amount of total gains/(losses) included in earnings attributable to the change in unrealized gains or losses relating to assets and liabilities still held at the reporting date	$	—	$	5	$	133	$	59	$	196
The amount of total gains/(losses) included in other comprehensive income attributable to the change in unrealized gains or losses relating to assets and liabilities still held at the reporting date	$	3	$	—	$	43	$	42	$	87
Three Months Ended March 31, 2022:
Balance, beginning of period	$	91	$	70	$	3,320	$	2,718	$	6,199
Total gains/(losses) realized and unrealized:
Included in earnings	—		(17)		(93)		(96)		(204)
Included in other comprehensive income	(4)		—		(96)		(76)		(176)
Settlements	(1)		(2)		—		(78)		(80)
Balance, end of period	$	86	$	52	$	3,131	$	2,469	$	5,738
The amount of total gains/(losses) included in earnings attributable to the change in unrealized gains or losses relating to assets and liabilities still held at the reporting date	$	—	$	(17)	$	(93)	$	(96)	$	(204)
The amount of total gains/(losses) included in other comprehensive income attributable to the change in unrealized gains or losses relating to assets and liabilities still held at the reporting date	$	(4)	$	—	$	(96)	$	(76)	$	(176)

Summary of Gains and Losses (Realized and Unrealized) Relating to Level 3 Assets and Liabilities Included in Earnings

Gains and losses (realized and unrealized) relating to Level 3 assets and liabilities included in earnings for the affected periods are reported as follows:

	Three Months Ended March 31, 2023								Three Months Ended March 31, 2022
	Net Investment Income		Net Gains (Losses) on Derivative Contracts		Income (Loss)  on Variable Interest Entities		Other Income or  (Expense)		Net Investment Income		Net Gains (Losses) on Derivative Contracts		Income (Loss)  on Variable Interest Entities		Other Income or  (Expense)
Total gains (losses) included in earnings for the period	$	—	$	5	$	191	$	—	$	—	$	(17)	$	(188)	$	—
Changes in unrealized gains (losses) relating to financial instruments still held at the reporting date	—		5		191		—		—		(17)		(188)		—

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Insurance Contracts (Tables)

3 Months Ended

Mar. 31, 2023

Mar. 31, 2022

Insurance [Line Items]

Schedule of Loss And Loss Expense Reserves And Subrogation Recoverable Table [Table Text Block]

Ambac’s loss and loss expense reserves (“loss reserves”) are based on management’s on-going review of the insured portfolio. Below are the components of the loss and loss expense reserves and the subrogation recoverable asset at March 31, 2023 and December 31, 2022:

	March 31, 2023										December 31, 2022
	Specialty Property and Casualty		Legacy Financial Guarantee								Specialty Property and Casualty		Legacy Financial Guarantee
			Present Value of Expected Net Cash Flows										Present Value of Expected Net Cash Flows				:	:		:	:
Balance Sheet Line Item	Gross Loss and Loss Expense Reserves		Claims and Loss Expenses		Recoveries		Unearned Premium Revenue		Gross Loss and Loss Expense Reserves		Gross Loss and Loss Expense Reserves		Claims and Loss Expenses		Recoveries			Unearned Premium Revenue			Gross Loss and Loss Expense Reserves
March 31, 2023:
Loss and loss expense reserves	$	107	$	822	$	(48)	$	(30)	$	851	$	90	$	787	$	(44)		$	(28)		$	805
Subrogation recoverable	—		2		(148)		—		(146)		—		5		(276)			—			(271)
Totals	$	107	$	824	$	(196)	$	(30)	$	705	$	90	$	791	$	(319)		$	(28)		$	534

Premiums Receivable by Risk Classification Code [Table Text Block]

Below is the amortized cost basis of financial guarantee premium receivables by risk classification code and asset class as of March 31, 2023 and December 31, 2022:

	Surveillance Categories as of March 31, 2023												Surveillance Categories as of December 31, 2022
Type of Guaranteed Bond	I		IA		II		III		IV		Total		I		IA		II		III		IV		Total
Public Finance:
Housing revenue	$	138	$	3	$	5	$	—	$	—	$	146	$	140	$	3	$	5	$	—	$	—	$	148
Other	2		—		—		—		—		2		2		—		—		—		—		2
Total Public Finance	140		3		5		—		—		148		142		3		5		—		—		150
Structured Finance:
Mortgage-backed and home equity	—		—		—		—		11		12		—		—		—		—		11		11
Student loan	1		1		—		7		—		8		1		1		—		7		—		8
Other	3		—		—		—		—		3		4		—		—		—		—		4
Total Structured Finance	4		1		—		7		11		23		5		1		—		7		11		24
International:
Sovereign/sub-sovereign	53		7		—		9		—		69		49		7		—		9		—		64
Investor-owned and public utilities	18		—		—		—		—		18		18		—		—		—		—		18
Other	3		—		—		—		—		3		2		—		—		—		—		2
Total International	74		7		—		9		—		90		70		7		—		9		—		85
Total (1) (2)	$	218	$	10	$	5	$	16	$	11	$	261	$	217	$	10	$	5	$	16	$	11	$	259

(1)    Excludes specialty property and casualty premium receivables of $17 and $16 at March 31, 2023 and December 31, 2022, respectively.

(2)    The underwriting origination dates for all policies included are greater than five years prior to the current reporting date.

Premium Receivable, Allowance for Credit Loss [Table Text Block]

Below is a rollforward of the premium receivable allowance for credit losses as of March 31, 2023 and 2022:

Three Months Ended March 31,	2023		2022
Beginning balance	$	5	$	9
Current period provision (benefit)	—		(1)
Write-offs of the allowance	—		—
Recoveries of previously written-off amounts	—		—
Ending balance (1)	$	5	$	8

(1)At March 31, 2023 and 2022, $0 and $1 of premiums were past due.

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:

Three Months Ended March 31,	2023		2022
Beginning gross loss and loss expense reserves	$	534	$	(522)
Reinsurance recoverable	115		56
Beginning balance of net loss and loss expense reserves	419		(578)
Losses and loss expenses (benefit):
Current year	2		1
Prior years	16		23
Total (1) (2)	18		24
Loss and loss expenses paid (recovered):
Current year	—		—
Prior years	(141)		(150)
Total	(141)		(150)
Foreign exchange effect	—		(1)
Ending net loss and loss expense reserves	578		(404)
Impact of VIE consolidation	—		(292)
Reinsurance recoverable (3)	127		49
Ending gross loss and loss expense reserves	$	705	$	(647)

(1)Total losses and loss expenses (benefit) includes $(20) and $(7) for the three months ended March 31, 2023 and 2022, respectively, related to ceded reinsurance.

(2)Ambac recorded 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 incurred associated with changes in estimated R&W's for the three months ended March 31, 2023 and 2022, was $0 and $224, respectively.

(3)Represents reinsurance recoverable on future loss and loss expenses. Additionally, the Balance Sheet line "Reinsurance recoverable on paid and unpaid losses" includes reinsurance recoverables (payables) of $3 and $0 as of March 31, 2023 and 2022, respectively, related to previously presented loss and loss 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 expense reserves or subrogation recoverable at March 31, 2023 and December 31, 2022, 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 March 31, 2023 and December 31, 2022,was 3.5% and 3.9%, respectively.

Surveillance Categories as of March 31, 2023
	I		IA		II		III		IV		V		Total
Number of policies	32		7		10		12		102		5		168
Remaining weighted-average contract period (in years) (1)	8		15		12		14		12		6		12
Gross insured contractual payments outstanding:
Principal	$	570	$	514	$	1,056	$	414	$	1,597	$	34	$	4,185
Interest	487		338		297		149		583		19		1,872
Total	$	1,057	$	852	$	1,353	$	563	$	2,180	$	53	$	6,058
Gross undiscounted claim liability	$	3	$	7	$	59	$	402	$	749	$	53	$	1,272
Discount, gross claim liability	—		(1)		(8)		(137)		(299)		(9)		(455)
Gross claim liability before all subrogation and before reinsurance	3		6		50		265		449		44		818
Less:
Gross other subrogation (2)	(14)		(4)		—		(30)		(194)		(12)		(254)
Discount, other subrogation	2		1		—		5		48		3		59
Discounted other subrogation, before reinsurance	(11)		(4)		—		(26)		(146)		(8)		(196)
Gross claim liability, net of all subrogation and discounts, before reinsurance	(9)		2		50		240		303		36		622
Less: Unearned premium revenue	(1)		(5)		(12)		(1)		(10)		(1)		(30)
Plus: Loss expense reserves	1		1		1		1		2		—		6
Gross loss and loss expense reserves	$	(9)	$	(2)	$	40	$	240	$	295	$	35	$	598
Reinsurance recoverable reported on Balance Sheet (3)	$	1	$	—	$	9	$	21	$	3			$	34

(1)Remaining weighted-average contract period is weighted based on projected gross claims over the lives of the respective policies.

(2)Other subrogation represents subrogation related to excess spread and other contractual cash flows on public finance and structured finance transactions, including RMBS.

(3)Reinsurance recoverable reported on the Balance Sheet includes reinsurance recoverables of $34 related to future loss and loss expenses and $0 related to presented loss and loss expenses and subrogation.

Surveillance Categories as of December 31, 2022
	I		IA		II		III		IV		V		Total
Number of policies	37		6		9		12		93		5		162
Remaining weighted-average contract period (in years) (1)	7		19		14		14		12		7		14
Gross insured contractual payments outstanding:
Principal	$	709	$	200	$	459	$	1,000	$	1,646	$	34	$	4,047
Interest	526		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 subrogation	2		—		—		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 reserves	1		1		—		2		4		—		8
Gross loss and loss 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 expenses and $0 related to presented loss and loss expenses and subrogation.

Summary of Rollforward of RMBS Subrogation, by Estimation Approach

On December 29, 2022, AAC entered into a Settlement Agreement and Release with Nomura Credit & Capital, Inc. ("Nomura") whereby the parties settled all RMBS litigation brought by AAC against Nomura and AAC received $140 on January 3, 2023, bringing to a close all of AAC's legacy litigation against RMBS sponsors.

Effects of Reinsurance

The effect of reinsurance on premiums written and earned was as follows:

	Three Months Ended March 31,
	2023				2022
	Written		Earned		Written		Earned
Direct	$	61	$	46	$	30	$	23
Assumed	—		—		—		—
Ceded	43		32		18		8
Net premiums	$	18	$	14	$	12	$	15

The following table summarizes net premiums earned by location of risk:

Three Months Ended March 31,	2023		2022
United States	$	11	$	9
United Kingdom	2		4
Other international	—		1
Total	$	14	$	15

Premiums Receivable for Financial Guarantees

Below is the gross premium receivable roll-forward, net of the allowance for credit losses, for the affected periods:

Three Months Ended March 31,	2023		2022
Beginning premium receivable	$	254	$	320
Premium receipts	(9)		(15)
Adjustments for changes in expected and contractual cash flows for contracts (1)	7		3
Accretion of premium receivable discount for contracts	2		2
Changes to allowance for credit losses	—		1
Other adjustments (including foreign exchange) (2)	2		(3)
Ending premium receivable (3)	$	256	$	308

(1)Adjustments for changes in expected and contractual cash flows are primarily due to lower discount rates

(2)Includes foreign exchange gains (losses) of $2 and $(4) for 2023 and 2022, respectively.

(3)Premium receivable includes premiums to be received in foreign denominated currencies most notably in British Pounds and Euros. At March 31, 2023 and 2022, premium receivables include British Pounds of $75 (£61) and $101 (£77), respectively, and Euros of $15 (€13) and $16 (€15), respectively.

Financial Guarantee Insurance Contracts, Premium Received over Contract Period

The following table summarizes the future gross undiscounted premiums to be collected and future premiums earned, net of reinsurance at March 31, 2023:

	Future Premiums to be Collected (1)		Future Premiums to be Earned Net of Reinsurance (2)
Three months ended:
June 30, 2023	$	7	$	5
September 30, 2023	7		5
December 31, 2023	5		5
Twelve months ended:
December 31, 2024	26		20
December 31, 2025	25		19
December 31, 2026	24		19
December 31, 2027	23		18
Five years ended:
December 31, 2032	98		73
December 31, 2037	62		44
December 31, 2042	29		17
December 31, 2047	14		8
December 31, 2052	4		2
December 31, 2057	—		—
Total	$	325	$	235

(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 in the Notes to Consolidated Financial Statements included in Ambac's Annual Report on Form 10-K for the year ended December 31, 2022. 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.

Reinsurance Recoverable, Credit Quality Indicator

The following table sets forth our three most significant reinsurers by amount of reinsurance recoverable as of March 31, 2023.

Reinsurers	Type of Insurance	Rating  (1)	Reinsurance Recoverable (2)		Unsecured Recoverable (3)
QBE Insurance Corporation	Specialty P&C	A	$	40	$	40
Assured Guaranty Re Ltd.	Financial Guarantee	AA	30		—
General Reinsurance Company	Specialty P&C	A++	37		27
All other reinsurers			23		7
Total recoverables			$	130	$	75

(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.

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Derivative Instruments (Tables)

3 Months Ended

Mar. 31, 2023

Summary of Gross Fair Values of Individual Derivative Instruments

The following tables summarize the gross fair values of individual derivative instruments and the impact of legal rights of offset as reported in the Consolidated Balance Sheets as of March 31, 2023 and December 31, 2022:

	March 31, 2023										December 31, 2022
	Gross Amounts of Recognized Assets / Liabilities		Gross Amounts Offset in the Consolidated Balance Sheet		Net Amounts of Assets/ Liabilities Presented in the Consolidated Balance Sheet		Gross Amount of Collateral Received / Pledged Not Offset in the Consolidated Balance  Sheet		Net Amount		Gross Amounts of Recognized Assets / Liabilities		Gross Amounts Offset in the Consolidated Balance Sheet		Net Amounts of Assets/ Liabilities Presented in the Consolidated Balance Sheet		Gross Amount of Collateral Received / Pledged Not Offset in the Consolidated Balance  Sheet		Net Amount
Derivative Assets:
Interest rate swaps	$	30	$	—	$	30	$	—	$	30	$	27	$	—	$	27	$	—	$	27
Warrants	1		—		1		—		1		1		—		1		—		1
Total non-VIE derivative assets	$	31	$	—	$	31	$	—	$	31	$	28	$	—	$	27	$	—	$	27
Derivative Liabilities:
Interest rate swaps	$	44	$	—	$	44	$	43	$	—	$	38	$	—	$	38	$	38	$	—
Total non-VIE derivative liabilities	$	44	$	—	$	44	$	43	$	—	$	38	$	—	$	38	$	38	$	—
Variable Interest Entities Derivative Assets:
Interest rate swaps	$	198	$	—	$	198	$	198	$	—	$	190	$	—	$	190	$	—	$	190
Currency swaps	45		—		45		45		—		49		—		49		—		49
Total VIE derivative assets	$	243	$	—	$	243	$	243	$	—	$	239	$	—	$	239	$	—	$	239
Variable Interest Entities Derivative Liabilities:
Interest rate swaps	$	1,174	$	—	$	1,174	$	—	$	1,174	$	1,048	$	—	$	1,048	$	—	$	1,048
Total VIE derivative liabilities	$	1,174	$	—	$	1,174	$	—	$	1,174	$	1,048	$	—	$	1,048	$	—	$	1,048

Summary of Location and Amount of Gains and Losses of Derivative Contracts

The following tables summarize the location and amount of gains and losses of derivative contracts in the Unaudited Consolidated Statements of Total Comprehensive Income (Loss) for the three months ended March 31, 2023 and 2022:

	Location of Gain (Loss) Recognized in Consolidated Statements of Total Comprehensive Income (Loss)	Amount of Gain (Loss) Recognized in Consolidated Statement of Total Comprehensive Income (Loss)
		Three Months Ended March 31,
		2023		2022
Non-VIE derivatives:
Interest rate swaps	Net gains (losses) on derivative contracts	(3)		30
Warrants	Net gains (losses) on derivative contracts	—		—
Futures contracts	Net gains (losses) on derivative contracts	—		27
Total Non-VIE derivatives		$	(4)	$	57
Variable Interest Entities:
Currency swaps	Income (loss) on variable interest entities	$	(99)	$	6
Interest rate swaps	Income (loss) on variable interest entities	(3)		5
Total Variable Interest Entities		(102)		11
Total derivative contracts		$	(105)	$	68

Summary of Notional Amounts of AFS's Trading Derivative Products

As of March 31, 2023 and December 31, 2022, the notional amounts of AFS’s derivatives are as follows:

	Notional
Type of Derivative	March 31, 2023		December 31, 2022
Interest rate swaps—pay-fixed/receive-variable	$	861	$	989
Interest rate swaps—receive-fixed/pay-variable	332		337

Variable Interest Entity, Primary Beneficiary [Member]

Summary of Notional Amounts of AFS's Trading Derivative Products

The notional for VIE derivatives outstanding as of March 31, 2023 and December 31, 2022, were as follows:

	Notional
Type of VIE Derivative	March 31, 2023		December 31, 2022
Interest rate swaps—receive-fixed/pay-variable	$	1,609	$	1,573
Interest rate swaps—pay-fixed/receive-variable	890		887
Currency swaps	169		176

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Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2023

Insurance Intangible Asset [Member]

Finite-Lived Intangible Assets [Line Items]

Schedule of Finite-Lived Intangible Assets

ntangible assets and accumulated amortization are included in the Consolidated Balance Sheets, as shown below.

	March 31, 2023		December 31, 2022
Finite-lived Intangible Assets:
Insurance intangible:
Gross carrying value	$	1,251	$	1,247
Accumulated amortization	990		981
Net insurance intangible asset	261		266
Other intangibles:
Gross carrying value	52		52
Accumulated amortization	7		6
Net other intangible assets	46		47
Total finite-lived intangible assets	307		312
Indefinite-lived Intangible Assets:
Insurance licenses	14		14
Total intangible assets	$	321	$	326

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Special Purpose Entities, Including Variable Interest Entities (Tables)

3 Months Ended

Mar. 31, 2023

Variable Interest Entity [Line Items]

Components of VIE Gain (Loss) [Table Text Block]

The following schedule details the components of Income (loss) on variable interest entities for the affected periods:

Three Months Ended March 31,	2023		2022
Net change in fair value of VIE assets and liabilities reported under the fair value option	$	3	$	(1)
Less: Credit risk changes of fair value option long-term debt reported through other comprehensive income (loss)	—		(1)
Net change in fair value of VIE assets and liabilities reported in earnings under the fair value option	3		(1)
Investment income (loss)	2		(4)
Net realized investment gains (losses) on available-for-sale securities	—		1
Interest expense on long-term debt carried at par less unamortized cost	(5)		(2)
Gain (loss) from consolidating VIEs	—		28
Income (loss) on variable interest entities	$	(1)	$	22

Summary of Carrying Amount of Assets, Liabilities and Maximum Exposure to Loss of Ambac's Variable Interests in Non-Consolidated Variable Interest Entities

The following table displays the carrying amount of the assets, liabilities and maximum exposure to loss of Ambac’s variable interests in non-consolidated VIEs resulting from financial guarantee and derivative contracts by major underlying asset classes, as of March 31, 2023 and December 31, 2022:

	March 31, 2023:								December 31, 2022:
	Carrying Value of Assets and Liabilities								Carrying Value of Assets and Liabilities
	Maximum Exposure To Loss (1)		Insurance Assets (2)		Insurance Liabilities (3)		Net Derivative Assets (Liabilities) (4)		Maximum Exposure To Loss (1)		Insurance Assets (2)		Insurance Liabilities (3)		Net Derivative Assets (Liabilities) (4)
Global structured finance:
Mortgage-backed—residential	$	2,531	$	141	$	437	$	—	$	2,559	$	266	$	400	$	—
Other consumer asset-backed	630		5		226		—		652		6		225		—
Other	424		2		2		—		430		2		2		1
Total global structured finance	3,585		148		665		—		3,642		274		628		1
Global public finance	17,907		221		216		—		17,997		216		212		—
Total	$	21,492	$	370	$	881	$	—	$	21,639	$	490	$	840	$	1

(1)Maximum exposure to loss represents the maximum future payments of principal and interest on insured obligations and derivative contracts. Ambac’s maximum exposure to loss does not include the benefit of any financial instruments (such as reinsurance or hedge contracts) that Ambac may utilize to mitigate the risks associated with these variable interests.

(2)Insurance assets represent the amount included in “Premium receivables” and “Subrogation recoverable” for financial guarantee insurance contracts on Ambac’s Consolidated Balance Sheets.

(3)Insurance liabilities represent the amount included in “Loss and loss expense reserves” and “Unearned premiums” for financial guarantee insurance contracts on Ambac’s Consolidated Balance Sheets.

(4)Net derivative assets (liabilities) represent the fair value recognized on interest rate swaps on Ambac’s Consolidated Balance Sheets.

Schedule of Variable Interest Entities Assets and Liabilities [Table Text Block]

The following table summarizes the carrying values of assets and liabilities, along with other supplemental information related to FG VIEs that are consolidated as a result of financial guarantees of Ambac UK and AAC:

	March 31, 2023						December 31, 2022
	Ambac UK		Ambac Assurance		Total VIEs		Ambac UK		Ambac Assurance		Total VIEs
ASSETS:
Fixed maturity securities, at fair value:
Corporate obligations, fair value option	$	2,003	$	—	$	2,003	$	1,828	$	—	$	1,828
Municipal obligations, trading	—		16		16		—		43		43
Municipal obligations, available-for-sale (1)	—		100		100		—		96		96
Total FG VIE fixed maturity securities, at fair value	2,003		116		2,119		1,828		139		1,967
Restricted cash	255		1		256		1		16		17
Loans, at fair value (2)	1,856		—		1,856		1,829		—		1,829
Derivative assets	243		—		243		239		—		239
Other assets	—		1		1		—		2		2
Total FG VIE assets	$	4,358	$	118	$	4,476	$	3,896	$	157	$	4,054
LIABILITIES:
Long-term debt:
Long-term debt, at fair value (3)	$	2,869	$	—	$	2,869	$	2,788	$	—	$	2,788
Long-term debt, at par less unamortized discount	—		191		191		—		319		319
Total long-term debt	2,869		191		3,060		2,788		319		3,107
Derivative liabilities	1,174		—		1,174		1,048		—		1,048
Cash collateral payable	254		—		254		—		—		—
Other liabilities	—		1		1		—		5		5
Total FG VIE liabilities	$	4,297	$	192	$	4,489	$	3,836	$	324	$	4,160
Number of FG VIEs consolidated	4		4		8		5		4		9

(1)Available-for-sale FG VIE fixed maturity securities consist of municipal obligations with an amortized cost basis of $99 and $99 at March 31, 2023 and December 31, 2022, respectively. At March 31, 2023, there were $2 aggregate gross unrealized gains and $(1) aggregated gross unrealized losses. At December 31, 2022, there were $1 aggregate gross unrealized gains and $(4) aggregated gross unrealized losses. All such securities had contractual maturities due after ten years as of March 31, 2023.

(2)The unpaid principal balances of loan assets carried at fair value were $1,975 as of March 31, 2023 and $1,977 as of December 31, 2022.

(3)The unpaid principal balances of long-term debt carried at fair value were $3,088 as of March 31, 2023 and $3,064 as of December 31, 2022.

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Revenue Recognition and Deferred Revenue (Tables)

3 Months Ended

Mar. 31, 2023

Revenue Recognition and Deferred Revenue [Abstract]

Disaggregation of Revenue

The following table presents the Insurance Distribution business operations revenues recognized in accordance with the Revenue from Contracts with Customers Topic of the ASC disaggregated by policy type for the affected periods:

Three Months Ended March 31,	2023		2022
Employer Stop Loss	$	5	$	4
Affinity Products	5		5
Commercial auto	3		—
Other	1		—
Total	$	15	$	9

Contract with Customer, Contract Asset, Contract Liability, and Receivable

The balances of contract assets and contract liabilities with customers were as follows:

	March 31, 2023		December 31, 2022
Premiums and commissions receivable	$	8	$	7
Contract assets	10		5
Contract liabilities	1		1

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Comprehensive Income (Tables)

3 Months Ended

Mar. 31, 2023

Equity [Abstract]

Schedule of Changes in Balances of Each Component of Accumulated Other Comprehensive Income

The following tables detail the changes in the balances of each component of accumulated other comprehensive income for the affected periods:

	Three Months Ended March 31, 2023:										Three Months Ended March 31, 2022:
	Unrealized Gains (Losses) on Available for Sale Securities (1)		Amortization of Postretirement Benefit (1)		Gain (Loss) on Foreign  Currency Translation (1)		Credit Risk Changes of Fair Value Option Liabilities  (1) (2)		Total		Unrealized Gains (Losses) on Available for Sale Securities (1)		Amortization of Postretirement Benefit (1)		Gain (Loss) on Foreign  Currency Translation (1)		Credit Risk Changes of Fair Value Option Liabilities  (1) (2)		Total
Beginning Balance	$	(71)	$	3	$	(184)	$	(1)	$	(253)	$	154	$	4	$	(100)	$	(1)	$	58
Other comprehensive income (loss) before reclassifications	14		3		16		—		33		(104)		—		(23)		—		(127)
Amounts reclassified from accumulated other comprehensive income (loss)	4		—		—		—		3		(1)		—		—		—		(1)
Net current period other comprehensive income (loss)	17		3		16		—		36		(105)		—		(23)		—		(127)
Ending Balance	$	(54)	$	6	$	(168)	$	(1)	$	(217)	$	49	$	4	$	(123)	$	(1)	$	(70)

(1)All amounts are net of tax and noncontrolling interest. Amounts in parentheses indicate reductions to Accumulated Other Comprehensive Income.

(2)Represents the changes in fair value attributable to instrument-specific credit risk of liabilities for which the fair value option is elected.

Schedule of Amounts Reclassed Out of Each Component of Accumulated Other Comprehensive Income

The following table details the significant amounts reclassified from each component of accumulated other comprehensive income, shown in the above rollforward tables, for the affected periods:

Details about Accumulated Other Comprehensive Income Components	Amount Reclassified from  Accumulated Other Comprehensive Income				Affected Line Item in the Consolidated Statement of Total Comprehensive Income (Loss)
	Three Months Ended March 31,
	2023		2022
Unrealized Gains (Losses) on Available-for-Sale Securities
	$	4	$	(1)	Net realized investment gains (losses)
	(1)		—		Provision for income taxes
	$	4	$	(1)	Net of tax and noncontrolling interest
Amortization of Postretirement Benefit
Prior service cost	$	—	$	—	Other income
Actuarial (losses)	—		—		Other income
	—		—		Total before tax
	—		—		Provision for income taxes
	$	—	$	—	Net of tax and noncontrolling interest
Credit Risk Changes of Fair Value Option Liabilities
	$	—	$	1	Credit risk changes of fair value option liabilities
	—		—		Provision for income taxes
	$	—	$	—	Net of tax and noncontrolling interest
Total reclassifications for the period	$	3	$	(1)	Net of tax and noncontrolling interest

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Net Income Per Share (Tables)

3 Months Ended

Mar. 31, 2023

Earnings Per Share [Abstract]

Reconciliation of Common Shares Used for Basic and Diluted Earnings Per Share

The following table provides a reconciliation of the weighted average shares denominator used for basic net income per share to the denominator used for diluted net income per share:

Three Months Ended March 31,	2023	2022
Basic weighted average shares outstanding denominator	45,564,276	46,731,459
Effect of potential dilutive shares :
Warrants	—	—
Restricted stock units	—	82,066
Performance stock units (1)	—	546,206
Diluted weighted average shares outstanding denominator	45,564,276	47,359,731
Anti-dilutive shares excluded from the above reconciliation:
Warrants	4,876,114	4,877,617
Restricted stock units	555,354	253,828
Performance stock units (1)	601,033	—

(1)    Performance stock units are reflected based on the performance metrics through the balance sheet date. Vesting of these units is contingent upon meeting certain performance metrics. Although a portion of these performance metrics have been achieved as of the respective period end, it is possible that awards may no longer meet the metric at the end of the performance period.

Schedule of Earnings Per Share, Basic and Diluted

The following table provides a reconciliation of net income attributable to common stockholders to the numerator in the basic and diluted earnings per share calculation, together with the resulting earnings per share amounts:

Three Months Ended March 31,	2023		2022
Net income (loss) attributable to common stockholders	$	(33)	$	2
Adjustment to redemption value (ASC 480)	—		—
Numerator of basic and diluted EPS	$	(33)	$	2
Per Share:
Basic	$	(0.73)	$	0.04
Diluted	$	(0.73)	$	0.04

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Income Taxes (Tables)

3 Months Ended

Mar. 31, 2023

Income Tax Disclosure [Abstract]

Major Jurisdictions

The following are the major jurisdictions in which Ambac and its subsidiaries operate and the earliest tax years subject to examination:

Jurisdiction	Tax Year
United States	2010
New York State	2013
New York City	2018
United Kingdom	2019
Italy	2018

Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]

U.S. and foreign components of pre-tax income (loss) were as follows:

Three Months Ended March 31,	2023		2022
U.S.	$	(48)	$	(1)
Foreign	19		4
Total	$	(29)	$	3

Schedule of Components of Income Tax Expense (Benefit)

The components of the provision for income taxes were as follows:

Three Months Ended March 31,	2023		2022
Current taxes
U. S. federal	$	—	$	—
U.S. state and local	—		—
Foreign	2		1
Total Current taxes	2		2
Deferred taxes
Foreign	2		(1)
Total Deferred taxes	2		(1)
Provision for income taxes	$	4	$	—

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Background and Business Description - Additional Information (Details)

3 Months Ended

Mar. 31, 2023

level3FinancialInstruments

USD ($)

Background And Basis Of Presentation [Line Items]

Entity Incorporation, Date of Incorporation

Apr. 29, 1991

Number of Admitted Carriers Owned | $

5

Number of Reportable Segments | level3FinancialInstruments

3

Background and Business Description

1.    BACKGROUND AND BUSINESS DESCRIPTION

The following description provides an update of Note 1. Background and Business Description in the Notes to the Consolidated Financial Statements included in Part II, Item 8 in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022, and should be read in conjunction with the complete descriptions provided in the Form 10-K. Capitalized terms used, but not defined herein, and in the other footnotes to the Consolidated Financial Statements included in this Quarterly Report on Form 10-Q shall have the meanings ascribed thereto in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022.

Ambac Financial Group, Inc. (“AFG”), headquartered in New York City, is a financial services holding company incorporated in the state of Delaware on April 29, 1991. References to “Ambac,” the “Company,” “we,” “our,” and “us” are to AFG and its subsidiaries, as the context requires. Ambac's business operations include:

•Legacy Financial Guarantee Insurance — Ambac's financial guarantee business includes the activities of Ambac Assurance Corporation ("AAC") and its wholly owned subsidiaries, including Ambac Assurance UK Limited (“Ambac UK”) and Ambac Financial Services LLC ("AFS"). Both AAC and Ambac UK (the "Legacy Financial Guarantee Companies") have financial guarantee insurance portfolios that have been in runoff since 2008. AFS uses derivatives to hedge interest rate risk in AAC's insurance and investment portfolios.

•Specialty Property & Casualty Insurance — Ambac's Specialty Property & Casualty Insurance program business. Currently includes five admitted carriers and an excess and surplus lines (“E&S” or “nonadmitted”) insurer (collectively, “Everspan”). Everspan carriers have an AM Best rating of 'A-' (Excellent).

•Insurance Distribution — Ambac's specialty property and casualty ("P&C") insurance distribution business, which could include Managing General Agents and Underwriters (collectively "MGAs"), insurance brokers, and other distribution businesses; currently includes Xchange Benefits, LLC (“Xchange”) a P&C MGA specializing in accident and health products; All Trans Risk Solutions, LLC ("All Trans"), an MGA specializing in commercial automobile insurance for specific "for-hire" auto clauses; and Capacity Marine Corporation ("Capacity Marine"), a wholesale and retail brokerage and reinsurance intermediary specializing in marine and international risk.

The Company reports these three business operations as segments; see Note 3. Segment Information for further information.

Strategies to Enhance Shareholder Value

The Company's primary goal is to maximize long-term shareholder value through the execution of targeted strategies for its (i) Specialty Property and Casualty Insurance and Insurance Distribution businesses and (ii) Legacy Financial Guarantee Insurance business.

Specialty Property and Casualty Insurance and Insurance Distribution strategic priorities include:

•Growing a Specialty Property and Casualty Insurance business which generates underwriting profits and an attractive return on capital from a diversified portfolio of commercial and personal liability risks accessed through program administrators.

•Building an Insurance Distribution business based on deep domain knowledge in specialty and niche classes of risk which generate attractive margins at scale. This will be achieved through acquisitions, new business “de-novo” formation and incubation, and product expansion supported by a centralized technology led shared services offering.

•Making opportunistic investments that are strategic to both the Specialty Property and Casualty Insurance and Insurance Distribution businesses.

Legacy Financial Guarantee Insurance strategic priorities include:

•Actively managing, de-risking and mitigating insured portfolio risk, and pursuing recovery of previously paid losses.

•Improving operating efficiency and optimizing our asset and liability profile.

•Exploring strategic options to further maximize value for AFG.

The execution of Ambac’s strategy to increase the value of its investment in AAC is subject to the restrictions set forth in the Settlement Agreement, dated as of June 7, 2010, as amended (the "Settlement Agreement"), by and among AAC, Ambac Credit Products LLC ("ACP"), AFG and certain counterparties to credit default swaps with ACP that were guaranteed by AAC, as well as the Stipulation and Order among the Office of the Commissioner of Insurance for the State of Wisconsin (“OCI”), AFG and AAC that became effective on February 12, 2018, as amended (the “Stipulation and Order”), each of which requires OCI and, under certain circumstances, holders of surplus notes, to approve certain actions taken by or in respect of AAC. In exercising its approval rights, OCI will act for the benefit of policyholders, and will not take into account the interests of AFG.

The Settlement Agreement limits certain activities of AAC and its subsidiaries, such as issuing indebtedness; engaging in mergers and similar transactions; disposing of assets; making restricted payments; creating or permitting liens; engaging in transactions with affiliates; modifying or creating tax sharing agreements; and taking certain actions with respect to surplus notes (among other restrictions and limitations). The Settlement Agreement includes certain allowances with respect to these activities and generally requires the approval of OCI and, in some cases, holders of

surplus notes issued pursuant to the Settlement Agreement, for consents, waivers or amendments.

The Stipulation and Order includes affirmative covenants, as well as restrictions on certain business activities and transactions, of AFG and AAC. The Stipulation and Order has no fixed term and may be terminated or modified only with the approval of OCI. OCI reserved the right to modify or terminate the Stipulation and Order in a manner consistent with the interests of policyholders, creditors and the public generally.

The execution of Ambac’s strategy to increase the value of its investment in AAC may also be affected by a new capital framework being developed by OCI ("OCI's Runoff Capital Framework") to assist OCI with making decisions related to capital and liquidity management at AAC. OCI's Runoff Capital Framework is not yet complete and therefore we are not able to predict the results of such and what it may mean for our Legacy Financial Guarantee strategy, particularly as it relates to deleveraging AAC and distributing capital to AFG.

Opportunities for remediating losses on poorly performing insured transactions also depend on market conditions, including the perception of AAC’s creditworthiness, the structure of the underlying risk and associated policy as well as other counterparty specific factors. AAC's ability to commute policies or purchase certain investments may also be limited by available liquidity.

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Basis of Presentation and Significant Accounting Policies FX gain (loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Foreign Currency Transaction Gain (Loss), before Tax	$ (2)	$ 1
Gain (Loss) on Investments [Member]
Foreign Currency Transaction Gain (Loss), before Tax	$ (2)	$ 3

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Basis of Presentation and Significant Accounting Policies Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Derivative [Line Items]
Stockholders' Equity Attributable to Noncontrolling Interest	$ 53,000,000		$ 53,000,000
Preferred Stock, Shares Issued	0
Redeemable Noncontrolling Interest, Equity, Carrying Amount	$ 20,000,000	$ 18,000,000	20,000,000	$ 18,000,000
Net Income (Loss) Attributable to Redeemable Noncontrolling Interest	0	0
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest	(1,000,000)	0
Noncontrolling Interest, Change in Redemption Value	$ 0	$ 0
Number of Variable Interest Entities Consolidated During the Period	0	2
Temporary Equity, Accretion to Redemption Value, Adjustment	$ 0	$ 0
Xchange
Derivative [Line Items]
Redeemable Noncontrolling Interest, Equity, Carrying Amount			$ 20,000,000
Redeemable Noncontrolling Interest, Equity, Redemption Value	$ 20,000,000
All Trans
Derivative [Line Items]
Business Combination, Redeemable Noncontrolling Percentage			15.00%
Business Acquisition, Percentage of Voting Interests Acquired			85.00%
Capacity Marine
Derivative [Line Items]
Business Combination, Redeemable Noncontrolling Percentage			20.00%
Business Acquisition, Percentage of Voting Interests Acquired			80.00%
Xchange
Derivative [Line Items]
Business Combination, Redeemable Noncontrolling Percentage			20.00%
Business Acquisition, Percentage of Voting Interests Acquired			80.00%

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Basis of Presentation and Significant Accounting Policies Supplemental Cash Flow information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Cash and Cash Equivalents, at Carrying Value	$ 38	$ 60
Income Taxes Paid	4	2
Restricted Cash	10	7	$ 14
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	304	116	61	$ 23
Non Cash Exchange of Puerto Rico Bonds		185
Securities acquired (transferred) in transactions related to Puerto Rico restructurings	(1)
Long-term Debt [Member]
Interest Paid, Including Capitalized Interest, Operating and Investing Activities	50	15
Variable Interest Entity, Primary Beneficiary [Member]
Restricted Cash	$ 256	$ 49	$ 17

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Segment Reporting (Details) $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($) level3FinancialInstruments	Mar. 31, 2022 USD ($)	Dec. 31, 2022 USD ($)
Segment Reporting, Revenue Reconciling Item [Line Items]
Number of Reportable Segments | level3FinancialInstruments	3
Revenues	$ 58	$ 119
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	(29)	3
Provision for income taxes	4	0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(33)	2
Premiums Earned, Net	14	15
Net Investment Income	34	5
Amortization of Intangible Assets	7	14
Interest Expense	16	44
Total assets	8,219	11,531	$ 7,973
Premiums Written, Net	18	12
Derivative, Gain (Loss) on Derivative, Net	(4)	57
Insurance Commissions and Fees	14	9
Losses and loss adjustment expenses	18	24
Other Cost and Expense, Operating	36	29
Insurance Commissions	8	5
Depreciation	0	0
Benefits, Losses and Expenses	86	116
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest	(1)	0
Net income attributable to common shareholders	(33)	2
Realized Investment Gains (Losses)	(4)	10
Contractually Specified Servicing Fee, Late Fee, and Ancillary Fee Earned in Exchange for Servicing Financial Asset	1	0
Other income Items	2	24
Deferred Policy Acquisition Costs, Amortization Expense	1	0
Financial Guarantee
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	32	109
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	(32)	6
Premiums Earned, Net	7	13
Net Investment Income	31	5
Amortization of Intangible Assets	6	14
Interest Expense	16	44
Total assets	7,503	11,075
Derivative, Gain (Loss) on Derivative, Net	(3)	57
Losses and loss adjustment expenses	13	23
Other Cost and Expense, Operating	28	21
Depreciation	0	0
Benefits, Losses and Expenses	64	102
Realized Investment Gains (Losses)	(4)	10
Other income Items	2	24
Deferred Policy Acquisition Costs, Amortization Expense	0	0
Specialty Property & Casualty Program
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	9	2
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	(1)	(2)
Premiums Earned, Net	7	1
Net Investment Income	1	0
Total assets	349	191
Losses and loss adjustment expenses	5	1
Other Cost and Expense, Operating	4	3
Depreciation	0	0
Benefits, Losses and Expenses	10	4
Managing General Agency Underwriter
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	15	9
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	4	2
Amortization of Intangible Assets	1	1
Total assets	140	97
Insurance Commissions and Fees	14	9
Other Cost and Expense, Operating	2	1
Insurance Commissions	8	5
Depreciation	0	0
Benefits, Losses and Expenses	11	6
Corporate and Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	2	0
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	0	(3)
Net Investment Income	2	0
Total assets	227	168
Derivative, Gain (Loss) on Derivative, Net	0
Other Cost and Expense, Operating	2	3
Depreciation	0	0
Benefits, Losses and Expenses	2	3
Surplus Notes	0	77
Realized Investment Gains (Losses)	0	0
Other income Items	0	0
Property and Casualty, Commercial Insurance
Segment Reporting, Revenue Reconciling Item [Line Items]
Contractually Specified Servicing Fee, Late Fee, and Ancillary Fee Earned in Exchange for Servicing Financial Asset	1	0
Other income Items	0	0
Deferred Policy Acquisition Costs, Amortization Expense	1	0
Insurance Distribution
Segment Reporting, Revenue Reconciling Item [Line Items]
Other income Items	$ 0	$ 0

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Investments - Summary of Amortized Cost and Estimated Fair Value of Available-for-Sale Investments, Excluding VIE Investments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Allowance for Credit Loss	$ 1	$ 0	$ 1
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	31	31
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	27	53
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	636	400
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	63	53
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	90	106
Fixed maturity securities, at fair value	1,923
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Period Increase (Decrease)	1
Short-term Investments [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position	14	86
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	12	78
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	2	8
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	0	0
Fixed maturity securities, at fair value	367	507
Fixed Income Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position	1,147	1,183
Debt Securities, Available-for-sale, Allowance for Credit Loss	1	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	31	31
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	513	791
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	27	53
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	634	392
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	63	53
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	90	106
Fixed maturity securities, at fair value	1,494	1,395
Fixed Income Securities [Member] | Municipal Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position	17	28
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	1	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	1	21
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	17	7
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	2	1
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	2	2
Fixed maturity securities, at fair value	57	43
Fixed Income Securities [Member] | Corporate Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position	630	559
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	1	1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	237	280
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	7	21
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	393	279
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	47	42
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	54	63
Fixed maturity securities, at fair value	679	598
Fixed Income Securities [Member] | Foreign Obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position	72	73
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	19	27
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1	2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	53	47
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	7	7
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	8	9
Fixed maturity securities, at fair value	79	76
Fixed Income Securities [Member] | US Government Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position	57	58
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	19	40
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1	3
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	38	19
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	2	1
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	3	4
Fixed maturity securities, at fair value	63	65
Fixed Income Securities [Member] | Residential Mortgage-Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position	132	132
Debt Securities, Available-for-sale, Allowance for Credit Loss	1	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	26	28
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	120	132
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	14	19
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	12	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	2	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	16	19
Fixed maturity securities, at fair value	240	238
Fixed Income Securities [Member] | Collateralized Debt Obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position	125	126
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	10	90
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	3
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	115	36
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	3	1
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	3	4
Fixed maturity securities, at fair value	137	137
Fixed Income Securities [Member] | Asset-backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position	111	203
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	3	2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	105	198
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	4	4
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	6	5
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	1	1
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	5	5
Fixed maturity securities, at fair value	223	224
Fixed Income Securities [Member] | Commercial Mortgage Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position	3	3
Debt Securities, Available-for-sale, Allowance for Credit Loss		0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	3	3
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	0	0
Fixed Income Securities [Member] | Collateralized Mortgage Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Allowance for Credit Loss	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	0	0
Fixed maturity securities, at fair value	15	15
Fixed Income Investments And Other Investments [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Allowance for Credit Loss	1	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	31	31
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	90	106
Fixed maturity securities, at fair value	1,862	1,902
Collateral Pledged [Member] | Fixed Income Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	0	0
Fixed maturity securities, at fair value	61	64
Collateral Pledged [Member] | Fixed Income Securities [Member] | Short-term Investments [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	0	0
Fixed maturity securities, at fair value	61	64
Asset Pledged as Collateral [Member] | Fixed Income Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Allowance for Credit Loss	$ 0	$ 0

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Investments - Summary of Amortized Cost and Estimated Fair Value of Available-for-Sale Investments, Excluding VIE Investments Held by Successor Ambac, by Contractual Maturity (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	$ 1,983	$ 2,041
Fixed maturity securities, at fair value	1,923
Amortized Cost, Due in one year or less	486
Amortized Cost, Due after one year through five years	536
Amortized Cost, Due after five years through ten years	297
Amortized Cost, Due after ten years	53
Amortized Cost, Total	1,371
Estimated Fair Value, Due in one year or less	485
Estimated Fair Value, Due after one year through five years	508
Estimated Fair Value, Due after five years through ten years	268
Estimated Fair Value, Due after ten years	47
Estimated Fair Value due, Total	1,307
Fixed Income Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	1,554	1,469
Fixed maturity securities, at fair value	1,494	1,395
Fixed Income Securities [Member] | Residential Mortgage-Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	231	230
Fixed maturity securities, at fair value	240	238
Fixed Income Securities [Member] | Collateralized Debt Obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	140	141
Fixed maturity securities, at fair value	137	137
Fixed Income Securities [Member] | Asset-backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	226	227
Fixed maturity securities, at fair value	$ 223	$ 224

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Investments - Summary of Gross Unrealized Losses and Fair Values of Ambac's Available-for-Sale Investments (Details) $ in Millions	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 27	$ 53
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	636	400
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	63	53
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	90	106
Debt Securities , Available for sale, Continuous Unrealized Loss Position,	525	869
Debt Securities, Available for sale, Unrealized Loss Position, Including Pledged Securities	1,161	1,269
Short-term Investments [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	12	78
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	2	8
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Unrealized Loss Position	14	86
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	$ 0	0
Ambac Insured Securities | Parsed Fixed Income Securities
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions	5
Fixed Income Investments And Other Investments [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	$ 90	106
Fixed Income Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	513	791
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	27	53
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	634	392
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	63	53
Debt Securities, Available-for-sale, Unrealized Loss Position	1,147	1,183
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	90	106
Fixed Income Securities [Member] | Municipal Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	1	21
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	17	7
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	2	1
Debt Securities, Available-for-sale, Unrealized Loss Position	17	28
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	2	2
Fixed Income Securities [Member] | Corporate Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	237	280
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	7	21
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	393	279
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	47	42
Debt Securities, Available-for-sale, Unrealized Loss Position	630	559
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	$ 54	63
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions	738
Fixed Income Securities [Member] | Debt Security, Government, Non-US [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 19	27
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1	2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	53	47
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	7	7
Debt Securities, Available-for-sale, Unrealized Loss Position	72	73
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	8	9
Fixed Income Securities [Member] | US Government Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	19	40
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1	3
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	38	19
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	2	1
Debt Securities, Available-for-sale, Unrealized Loss Position	57	58
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	3	4
Fixed Income Securities [Member] | Residential Mortgage-Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	120	132
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	14	19
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	12	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	2	0
Debt Securities, Available-for-sale, Unrealized Loss Position	132	132
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	16	19
Fixed Income Securities [Member] | Commercial Mortgage Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	3	3
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Unrealized Loss Position	3	3
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	0	0
Fixed Income Securities [Member] | Collateralized Debt Obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	10	90
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	3
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	115	36
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	3	1
Debt Securities, Available-for-sale, Unrealized Loss Position	125	126
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	3	4
Fixed Income Securities [Member] | Asset-backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	105	198
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	4	4
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	6	5
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	1	1
Debt Securities, Available-for-sale, Unrealized Loss Position	111	203
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	$ 5	5
Debt Securities Available for Sale Unrealized Loss Measured as a Percent of Amortized Cost	4.00%
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions	11
Fixed Income Securities [Member] | Ambac Insured Securities
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	$ 15
Debt Securities Available for Sale Unrealized Loss Measured as a Percent of Amortized Cost	13.00%
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions	12
Collateral Pledged [Member] | Fixed Income Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	$ 0	0
Collateral Pledged [Member] | Fixed Income Securities [Member] | Short-term Investments [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	$ 0	$ 0

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Investments - Additional Information (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Allowance for Credit Loss	$ 1	$ 0	$ 1
Securities fair value	23	23
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	$ 90	106
Average Percentage of Unrealized Loss Versus Amortized Cost for Below Investment Grade Securities	6.00%
Average Percentage of Unrealized Loss Versus Amortized Cost for Investment Grade Securities	8.00%
Investment Portfolio [Member]
Schedule of Investments [Line Items]
Fair Value of Cash and Securities Pledged to Derivative Counterparties	$ 61	64
Interest Rate Contract [Member]
Schedule of Investments [Line Items]
Other investments	84	80
Fixed Income Securities [Member]
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Allowance for Credit Loss	1	0
Debt Securities, Available-for-sale, Unrealized Loss Position	1,147	1,183
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	90	106
Fixed Income Securities [Member] | Corporate Debt Securities [Member]
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale, Unrealized Loss Position	630	559
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	54	63
Fixed Income Securities [Member] | Corporate Debt Securities [Member] | External Credit Rating, Investment Grade
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	53
Fixed Income Securities [Member] | Corporate Debt Securities [Member] | External Credit Rating, Non Investment Grade [Member]
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	1
Fixed Income Securities [Member] | Residential Mortgage-Backed Securities [Member]
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Allowance for Credit Loss	1	0
Debt Securities, Available-for-sale, Unrealized Loss Position	132	132
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	16	19
Fixed Income Securities [Member] | Asset-backed Securities [Member]
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale, Unrealized Loss Position	111	203
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	5	5
Reported Value Measurement [Member]
Schedule of Investments [Line Items]
Other investments	65	$ 61
Commitments [Member] | Partnership Interest [Member]
Schedule of Investments [Line Items]
Other investments	$ 57

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Investments - Summary of Amounts Included in Net Realized (Losses) Gains and Other-Than-Temporary Impairments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Investment [Line Items]
Foreign exchange (losses) gains	$ (2)	$ 1
Debt Securities, Available-for-sale, Allowance for Credit Loss, Not to Sell before Recovery, Credit Loss, Previously Recorded, Expense (Reversal)	(1)	(1)
Debt Securities, Available-for-sale, Allowance for Credit Loss, Sell before Recovery	0	0
Realized Investment Gains (Losses)	(4)	10
Fair Value of Securities Deposited in Connection wtih Letter of Credit	1		$ 1
Debt Securities, Available-for-sale, Realized Gain	0	23
Debt Securities, Available-for-sale, Realized Loss	2	15
Gain (Loss) on Investments [Member]
Investment [Line Items]
Foreign exchange (losses) gains	$ (2)	$ 3

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Investments - Summary of Sources of Collateral Received and Various Investment Agreement in which Collateral Pledged (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Investment [Line Items]
Fair Value Of Securities Deposited With Governmental Authorities	$ 23	$ 23
Fair Value of Securities Deposited in Connection wtih Letter of Credit	1	1
Standard & Poor's, B Rating [Member]
Investment [Line Items]
Investment Owned, at Fair Value	401	403
Standard & Poor's, B Rating [Member] | Municipal Bonds [Member]
Investment [Line Items]
Investment Owned, at Fair Value	10	10
Standard & Poor's, B Rating [Member] | Mortgage And Other Asset Backed Securities [Member]
Investment [Line Items]
Investment Owned, at Fair Value	392	394
Ambac Assurance Corporation [Member] | Standard & Poor's, B Rating [Member]
Investment [Line Items]
Investment Owned, at Fair Value	401	403
Ambac Assurance Corporation [Member] | Standard & Poor's, B Rating [Member] | Municipal Bonds [Member]
Investment [Line Items]
Investment Owned, at Fair Value	10	10
Ambac Assurance Corporation [Member] | Standard & Poor's, B Rating [Member] | Mortgage And Other Asset Backed Securities [Member]
Investment [Line Items]
Investment Owned, at Fair Value	$ 392	$ 394

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Investments - Summary of Fair Value, Including Financial Guarantee, and Weighted-Average Underlying Rating, Excluding Financial Guarantee, of Insured Securities (Details) - Standard & Poor's, B Rating [Member] - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Schedule of Investments [Line Items]
Fair value of securities that include benefit of guarantees provided by financial guarantors	$ 401	$ 403
Ambac Assurance Corporation [Member]
Schedule of Investments [Line Items]
Fair value of securities that include benefit of guarantees provided by financial guarantors	401	403
Municipal Bonds [Member]
Schedule of Investments [Line Items]
Fair value of securities that include benefit of guarantees provided by financial guarantors	10	10
Municipal Bonds [Member] | Ambac Assurance Corporation [Member]
Schedule of Investments [Line Items]
Fair value of securities that include benefit of guarantees provided by financial guarantors	10	10
Mortgage And Other Asset Backed Securities [Member]
Schedule of Investments [Line Items]
Fair value of securities that include benefit of guarantees provided by financial guarantors	392	394
Mortgage And Other Asset Backed Securities [Member] | Ambac Assurance Corporation [Member]
Schedule of Investments [Line Items]
Fair value of securities that include benefit of guarantees provided by financial guarantors	$ 392	$ 394

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Investments - Summary of Fair Value, Including Financial Guarantee, and Weighted-Average Underlying Rating, Excluding Financial Guarantee, of Insured Securities (Phantom) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Investment [Line Items]
Net Realized and Unrealized Gain (Loss) on Trading Securities	$ 7	$ (13)
Investment expense	(2)	(1)
Interest and Dividend Income, Securities, Operating, Available-for-Sale	21	14
Net investment income	34	5
Gains (losses) on securities held as of reporting date [Member]
Investment [Line Items]
Other Investments Income	5	(10)
Fixed Income Investments [Member]
Investment [Line Items]
Gross Investment Income, Operating	17	15
Short-Term [Member]
Investment [Line Items]
Gross Investment Income, Operating	6	0
Other Investments [Member]
Investment [Line Items]
Gross Investment Income, Operating	$ 13	$ 0

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Investments - Summary of Net Investment Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Investment [Line Items]
Equity Securities, FV-NI, Realized Gain (Loss)	$ 2	$ (3)
Interest and Dividend Income, Securities, Operating, Available-for-Sale	21	14
Short-term Investments [Member]
Investment [Line Items]
Gross Investment Income, Operating	6	0
Fixed Income Investments [Member]
Investment [Line Items]
Gross Investment Income, Operating	17	15
Fixed Income Securities, Trading
Investment [Line Items]
Gross Investment Income, Operating	$ 0	$ (9)

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Investments Investments - Equity Investments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]
Equity Securities Excluded From Fair Value Table	$ 12		$ 12
Equity Securities, FV-NI, Realized Gain (Loss)	2	$ (3)
Debt Securities, Available-for-sale, Allowance for Credit Loss	1	1	0
Net Realized and Unrealized Gain (Loss) on Trading Securities	7	$ (13)
Real Estate [Member]
Schedule of Equity Method Investments [Line Items]
Other investments	22		22
Hedge Funds, Multi-strategy [Member]
Schedule of Equity Method Investments [Line Items]
Other investments	178		186
Interest Rate Contract [Member]
Schedule of Equity Method Investments [Line Items]
Other investments	84		80
Illiquid Investments [Member]
Schedule of Equity Method Investments [Line Items]
Other investments	87		84
Insurance Linked [Member]
Schedule of Equity Method Investments [Line Items]
Other investments	1		1
Equity [Member]
Schedule of Equity Method Investments [Line Items]
Other investments	68		64
Credit Index Product [Member]
Schedule of Equity Method Investments [Line Items]
Other investments	47		63
Private Equity Funds [Member]
Schedule of Equity Method Investments [Line Items]
Other investments	49		47
Equity investments in pooled funds [Member]
Schedule of Equity Method Investments [Line Items]
Other investments	545		556
Equity Securities Excluded From Fair Value
Schedule of Equity Method Investments [Line Items]
Debt Securities, Available-for-sale, Allowance for Credit Loss	0		0
Convertibles and Bonds with Warrants Attached
Schedule of Equity Method Investments [Line Items]
Other investments	9
Priced Through Pricing Vendors [Member]
Schedule of Equity Method Investments [Line Items]
Other investments	65		61
Priced Through Pricing Vendors [Member] | Equity [Member]
Schedule of Equity Method Investments [Line Items]
Other investments	57		53
Priced Through Pricing Vendors [Member] | Convertibles and Bonds with Warrants Attached
Schedule of Equity Method Investments [Line Items]
Other investments	9		$ 8
Commitments [Member] | Partnership Interest [Member]
Schedule of Equity Method Investments [Line Items]
Other investments	$ 57

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Fair Value Measurements - Summary of Carrying Amount and Fair Value of Ambac's Financial Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	$ 1,923,000
Debt Securities, Available-for-sale, Allowance for Credit Loss	1,000	$ 0	$ 1,000
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	31,000	31,000
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	90,000	106,000
Financial assets:
Derivative assets	31,000	28,000
Other assets	0
Long-term Debt	497,000	639,000
Financial liabilities:
Derivative liabilities	44,000	38,000
Equity Securities Excluded From Fair Value Table	12,000	12,000
Debt Securities, Available-for-sale, Amortized Cost	1,983,000	2,041,000
Debt Securities, Available-for-Sale, Current	1,923,000	1,966,000
Fixed Income Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	1,494,000	1,395,000
Debt Securities, Available-for-sale, Allowance for Credit Loss	1,000	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	31,000	31,000
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	90,000	106,000
Financial liabilities:
Debt Securities, Available-for-sale, Amortized Cost	1,554,000	1,469,000
Fixed Income Investments And Other Investments [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	1,862,000	1,902,000
Debt Securities, Available-for-sale, Allowance for Credit Loss	1,000	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	31,000	31,000
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	90,000	106,000
Financial liabilities:
Debt Securities, Available-for-sale, Amortized Cost	1,922,000	1,977,000
Commercial Mortgage Backed Securities [Member] | Fixed Income Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Debt Securities, Available-for-sale, Allowance for Credit Loss		0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	0	0
Short-term Investments [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	367,000	507,000
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	0	0
Financial liabilities:
Debt Securities, Available-for-sale, Amortized Cost	367,000	507,000
Asset-backed Securities [Member] | Fixed Income Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	223,000	224,000
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	3,000	2,000
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	5,000	5,000
Financial liabilities:
Debt Securities, Available-for-sale, Amortized Cost	226,000	227,000
Collateralized Debt Obligations [Member] | Fixed Income Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	137,000	137,000
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	3,000	4,000
Financial liabilities:
Debt Securities, Available-for-sale, Amortized Cost	140,000	141,000
Residential Mortgage-Backed Securities [Member] | Fixed Income Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	240,000	238,000
Debt Securities, Available-for-sale, Allowance for Credit Loss	1,000	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	26,000	28,000
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	16,000	19,000
Financial liabilities:
Debt Securities, Available-for-sale, Amortized Cost	231,000	230,000
US Government Debt Securities [Member] | Fixed Income Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	63,000	65,000
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	3,000	4,000
Financial liabilities:
Debt Securities, Available-for-sale, Amortized Cost	66,000	68,000
Debt Security, Government, Non-US [Member] | Fixed Income Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	79,000	76,000
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	8,000	9,000
Financial liabilities:
Debt Securities, Available-for-sale, Amortized Cost	86,000	85,000
Corporate Debt Securities [Member] | Fixed Income Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	679,000	598,000
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	1,000	1,000
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	54,000	63,000
Financial liabilities:
Debt Securities, Available-for-sale, Amortized Cost	732,000	659,000
Municipal Bonds [Member] | Fixed Income Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	57,000	43,000
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	1,000	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	2,000	2,000
Financial liabilities:
Debt Securities, Available-for-sale, Amortized Cost	58,000	44,000
Collateralized Mortgage Backed Securities [Member] | Fixed Income Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	15,000	15,000
Debt Securities, Available-for-sale, Allowance for Credit Loss	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	0	0
Financial liabilities:
Debt Securities, Available-for-sale, Amortized Cost	15,000	15,000
Total Fair Value [Member]
Financial assets:
Cash	40,000	44,000
Reported Value Measurement [Member]
Financial assets:
Other investments	65,000	61,000
Cash	40,000	44,000
Loans	2,000	10,000
Total financial assets	7,056,000	6,726,000
Financial liabilities:
Liabilities for net financial guarantees written	318,000	159,000
Long-term debt	935,000	1,065,000
Total financial liabilities	5,531,000	5,418,000
Reported Value Measurement [Member] | Short-term Investments [Member]
Financial assets:
Short term investments	367,000	507,000
Reported Value Measurement [Member] | Other Debt Obligations [Member]
Financial assets:
Other investments	557,000	568,000
Reported Value Measurement [Member] | Interest Rate Swap [Member]
Financial liabilities:
Derivative liabilities	44,000	38,000
Reported Value Measurement [Member] | Interest Rate Swap [Member] | Other Assets [Member]
Financial assets:
Derivative assets	30,000	27,000
Reported Value Measurement [Member] | Warrants [Member]
Financial assets:
Derivative assets	1,000	1,000
Level 1 [Member]
Financial assets:
Cash	38,000	43,000
Total financial assets	922,000	833,000
Financial liabilities:
Liabilities for net financial guarantees written	0	0
Long-term debt	0	0
Total financial liabilities	0	0
Level 1 [Member] | Short-term Investments [Member]
Financial assets:
Short term investments	359,000	506,000
Level 1 [Member] | Loans Receivable [Member]
Financial assets:
Loans	0	0
Level 1 [Member] | Other Debt Obligations [Member]
Financial assets:
Other investments	65,000	61,000
Level 1 [Member] | Interest Rate Swap [Member]
Financial liabilities:
Derivative liabilities	0	0
Level 1 [Member] | Interest Rate Swap [Member] | Other Assets [Member]
Financial assets:
Derivative assets	0	0
Level 1 [Member] | Warrants [Member]
Financial assets:
Derivative assets	0	0
Level 2 [Member]
Financial assets:
Cash	2,000	1,000
Total financial assets	1,669,000	1,615,000
Financial liabilities:
Liabilities for net financial guarantees written	0	0
Long-term debt	764,000	864,000
Total financial liabilities	4,918,000	4,942,000
Level 2 [Member] | Short-term Investments [Member]
Financial assets:
Short term investments	8,000	1,000
Level 2 [Member] | Loans Receivable [Member]
Financial assets:
Loans	0	0
Level 2 [Member] | Other Debt Obligations [Member]
Financial assets:
Other investments	0	0
Level 2 [Member] | Interest Rate Swap [Member]
Financial liabilities:
Derivative liabilities	44,000	38,000
Level 2 [Member] | Interest Rate Swap [Member] | Other Assets [Member]
Financial assets:
Derivative assets	1,000	1,000
Level 2 [Member] | Warrants [Member]
Financial assets:
Derivative assets	0	0
Level 3 [Member]
Financial assets:
Cash	0	0
Total financial assets	3,974,000	3,772,000
Financial liabilities:
Liabilities for net financial guarantees written	668,000	476,000
Long-term debt	15,000	14,000
Total financial liabilities	799,000	644,000
Level 3 [Member] | Short-term Investments [Member]
Financial assets:
Short term investments	0	0
Level 3 [Member] | Loans Receivable [Member]
Financial assets:
Loans	2,000	10,000
Level 3 [Member] | Other Debt Obligations [Member]
Financial assets:
Other investments	0	0
Level 3 [Member] | Interest Rate Swap [Member]
Financial liabilities:
Derivative liabilities	0	0
Level 3 [Member] | Interest Rate Swap [Member] | Other Assets [Member]
Financial assets:
Derivative assets	30,000	26,000
Level 3 [Member] | Warrants [Member]
Financial assets:
Derivative assets	1,000	1,000
Commercial Mortgage Backed Securities [Member] | Reported Value Measurement [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	15,000	15,000
Municipal Bonds [Member] | Reported Value Measurement [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	86,000	102,000
Corporate Debt Securities [Member] | Reported Value Measurement [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	679,000	598,000
Debt Security, Government, Non-US [Member] | Reported Value Measurement [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	79,000	76,000
US Government Debt Securities [Member] | Reported Value Measurement [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	63,000	65,000
Residential Mortgage-Backed Securities [Member] | Reported Value Measurement [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	240,000	238,000
Collateralized Debt Obligations [Member] | Reported Value Measurement [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	137,000	137,000
Asset-backed Securities [Member] | Reported Value Measurement [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	223,000	224,000
Fair Value, Recurring [Member]
Financial assets:
Total financial assets	7,045,000	6,715,000
Financial liabilities:
Liabilities for net financial guarantees written	668,000	476,000
Long-term debt	779,000	878,000
Total financial liabilities	5,717,000	5,586,000
Fair Value, Recurring [Member] | Commercial Mortgage Backed Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	15,000	15,000
Fair Value, Recurring [Member] | Short-term Investments [Member]
Financial assets:
Short term investments	367,000	507,000
Fair Value, Recurring [Member] | Loans Receivable [Member]
Financial assets:
Loans	2,000	10,000
Fair Value, Recurring [Member] | Other Debt Obligations [Member]
Financial assets:
Other investments	545,000	556,000
Fair Value, Recurring [Member] | Asset-backed Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	223,000	224,000
Fair Value, Recurring [Member] | Collateralized Debt Obligations [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	137,000	137,000
Fair Value, Recurring [Member] | Residential Mortgage-Backed Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	240,000	238,000
Fair Value, Recurring [Member] | US Government Debt Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	63,000	65,000
Fair Value, Recurring [Member] | Debt Security, Government, Non-US [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	79,000	76,000
Fair Value, Recurring [Member] | Corporate Debt Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	679,000	598,000
Fair Value, Recurring [Member] | Municipal Bonds [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	86,000	102,000
Fair Value, Recurring [Member] | Interest Rate Swap [Member]
Financial liabilities:
Derivative liabilities	44,000	38,000
Fair Value, Recurring [Member] | Interest Rate Swap [Member] | Other Assets [Member]
Financial assets:
Derivative assets	30,000	27,000
Fair Value, Recurring [Member] | Warrants [Member]
Financial assets:
Derivative assets	1,000	1,000
Fair Value, Recurring [Member] | Level 1 [Member] | Commercial Mortgage Backed Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	0	0
Fair Value, Recurring [Member] | Level 1 [Member] | Asset-backed Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	0	0
Fair Value, Recurring [Member] | Level 1 [Member] | Collateralized Debt Obligations [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	0	0
Fair Value, Recurring [Member] | Level 1 [Member] | Residential Mortgage-Backed Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	0	0
Fair Value, Recurring [Member] | Level 1 [Member] | US Government Debt Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	63,000	65,000
Fair Value, Recurring [Member] | Level 1 [Member] | Debt Security, Government, Non-US [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	79,000	76,000
Fair Value, Recurring [Member] | Level 1 [Member] | Corporate Debt Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	0	0
Fair Value, Recurring [Member] | Level 1 [Member] | Municipal Bonds [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	0	0
Fair Value, Recurring [Member] | Level 2 [Member] | Commercial Mortgage Backed Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	15,000	15,000
Fair Value, Recurring [Member] | Level 2 [Member] | Asset-backed Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	155,000	157,000
Fair Value, Recurring [Member] | Level 2 [Member] | Collateralized Debt Obligations [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	137,000	137,000
Fair Value, Recurring [Member] | Level 2 [Member] | Residential Mortgage-Backed Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	240,000	238,000
Fair Value, Recurring [Member] | Level 2 [Member] | US Government Debt Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	0	0
Fair Value, Recurring [Member] | Level 2 [Member] | Debt Security, Government, Non-US [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	0	0
Fair Value, Recurring [Member] | Level 2 [Member] | Corporate Debt Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	667,000	585,000
Fair Value, Recurring [Member] | Level 2 [Member] | Municipal Bonds [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	86,000	102,000
Fair Value, Recurring [Member] | Level 3 [Member] | Commercial Mortgage Backed Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	0	0
Fair Value, Recurring [Member] | Level 3 [Member] | Asset-backed Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	69,000	67,000
Fair Value, Recurring [Member] | Level 3 [Member] | Collateralized Debt Obligations [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	0	0
Fair Value, Recurring [Member] | Level 3 [Member] | Residential Mortgage-Backed Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	0	0
Fair Value, Recurring [Member] | Level 3 [Member] | US Government Debt Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	0	0
Fair Value, Recurring [Member] | Level 3 [Member] | Debt Security, Government, Non-US [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	0	0
Fair Value, Recurring [Member] | Level 3 [Member] | Corporate Debt Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	13,000	12,000
Fair Value, Recurring [Member] | Level 3 [Member] | Municipal Bonds [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	0	0
Collateral Pledged [Member] | Fixed Income Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	61,000	64,000
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	0	0
Collateral Pledged [Member] | Short-term Investments [Member] | Fixed Income Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	61,000	64,000
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	0	0
Financial liabilities:
Debt Securities, Available-for-sale, Amortized Cost	61,000	64,000
Collateral Pledged [Member] | Short-term Investments [Member] | Reported Value Measurement [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	61,000	64,000
Collateral Pledged [Member] | Fair Value, Recurring [Member] | Short-term Investments [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	61,000	64,000
Collateral Pledged [Member] | Fair Value, Recurring [Member] | Level 1 [Member] | Short-term Investments [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	61,000	64,000
Collateral Pledged [Member] | Fair Value, Recurring [Member] | Level 2 [Member] | Short-term Investments [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	0	0
Collateral Pledged [Member] | Fair Value, Recurring [Member] | Level 3 [Member] | Short-term Investments [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	0	0
Asset Pledged as Collateral [Member] | Fixed Income Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	0
Financial liabilities:
Debt Securities, Available-for-sale, Amortized Cost	61,000	64,000
Variable Interest Entity, Primary Beneficiary [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	2,119,000	1,967,000
Financial assets:
Loans	1,856,000	1,829,000
Derivative assets	243,000	239,000
Long-term Debt	3,060,000	3,107,000
Financial liabilities:
Derivative liabilities	1,174,000	1,048,000
Long-term debt	2,869,000	2,788,000
Variable Interest Entity, Primary Beneficiary [Member] | Corporate Debt Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	2,003,000	1,828,000
Variable Interest Entity, Primary Beneficiary [Member] | Municipal Bonds [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	100,000	96,000
Financial liabilities:
Debt Securities, Available-for-sale, Amortized Cost	99,000	99,000
Variable Interest Entity, Primary Beneficiary [Member] | US States and Political Subdivisions Debt Securities
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	16,000	43,000
Variable Interest Entity, Primary Beneficiary [Member] | Reported Value Measurement [Member]
Financial assets:
Restricted Cash and Cash Equivalents, Current	256,000	17,000
Loans	1,856,000	1,829,000
Financial liabilities:
Long-term debt	3,060,000	3,107,000
Variable Interest Entity, Primary Beneficiary [Member] | Reported Value Measurement [Member] | Corporate Debt Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	2,003,000	1,828,000
Variable Interest Entity, Primary Beneficiary [Member] | Reported Value Measurement [Member] | Municipal Bonds [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	100,000		$ 96,000
Variable Interest Entity, Primary Beneficiary [Member] | Reported Value Measurement [Member] | Interest Rate Swap [Member]
Financial assets:
Derivative assets	198,000	190,000
Financial liabilities:
Derivative liabilities	1,174,000	1,048,000
Variable Interest Entity, Primary Beneficiary [Member] | Reported Value Measurement [Member] | Currency Swaps [Member]
Financial assets:
Derivative assets	45,000	49,000
Variable Interest Entity, Primary Beneficiary [Member] | Reported Value Measurement [Member] | US States and Political Subdivisions Debt Securities
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Debt Securities, Trading	16,000	43,000
Variable Interest Entity, Primary Beneficiary [Member] | Level 1 [Member]
Financial assets:
Restricted Cash and Cash Equivalents, Current	256,000	17,000
Loans	0	0
Financial liabilities:
Long-term debt	0	0
Variable Interest Entity, Primary Beneficiary [Member] | Level 1 [Member] | Corporate Debt Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	0	0
Variable Interest Entity, Primary Beneficiary [Member] | Level 1 [Member] | Municipal Bonds [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	0	0
Variable Interest Entity, Primary Beneficiary [Member] | Level 1 [Member] | Interest Rate Swap [Member]
Financial assets:
Derivative assets	0	0
Financial liabilities:
Derivative liabilities	0	0
Variable Interest Entity, Primary Beneficiary [Member] | Level 1 [Member] | Currency Swaps [Member]
Financial assets:
Derivative assets	0	0
Variable Interest Entity, Primary Beneficiary [Member] | Level 1 [Member] | US States and Political Subdivisions Debt Securities
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Debt Securities, Trading	0	0
Variable Interest Entity, Primary Beneficiary [Member] | Level 2 [Member]
Financial assets:
Restricted Cash and Cash Equivalents, Current	0	0
Loans	0	0
Financial liabilities:
Long-term debt	2,937,000	2,992,000
Variable Interest Entity, Primary Beneficiary [Member] | Level 2 [Member] | Corporate Debt Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	0	0
Variable Interest Entity, Primary Beneficiary [Member] | Level 2 [Member] | Municipal Bonds [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	100,000	96,000
Variable Interest Entity, Primary Beneficiary [Member] | Level 2 [Member] | Interest Rate Swap [Member]
Financial assets:
Derivative assets	198,000	190,000
Financial liabilities:
Derivative liabilities	1,174,000	1,048,000
Variable Interest Entity, Primary Beneficiary [Member] | Level 2 [Member] | Currency Swaps [Member]
Financial assets:
Derivative assets	45,000	49,000
Variable Interest Entity, Primary Beneficiary [Member] | Level 2 [Member] | US States and Political Subdivisions Debt Securities
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Debt Securities, Trading	16,000	43,000
Variable Interest Entity, Primary Beneficiary [Member] | Level 3 [Member]
Financial assets:
Restricted Cash and Cash Equivalents, Current	0	0
Loans	1,856,000	1,829,000
Financial liabilities:
Long-term debt	116,000	154,000
Variable Interest Entity, Primary Beneficiary [Member] | Level 3 [Member] | Corporate Debt Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	2,003,000	1,828,000
Variable Interest Entity, Primary Beneficiary [Member] | Level 3 [Member] | Municipal Bonds [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	0	0
Variable Interest Entity, Primary Beneficiary [Member] | Level 3 [Member] | Interest Rate Swap [Member]
Financial assets:
Derivative assets	0	0
Financial liabilities:
Derivative liabilities	0	0
Variable Interest Entity, Primary Beneficiary [Member] | Level 3 [Member] | Currency Swaps [Member]
Financial assets:
Derivative assets	0	0
Variable Interest Entity, Primary Beneficiary [Member] | Level 3 [Member] | US States and Political Subdivisions Debt Securities
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Debt Securities, Trading	0	0
Variable Interest Entity, Primary Beneficiary [Member] | Fair Value, Recurring [Member]
Financial assets:
Restricted Cash and Cash Equivalents, Current	256,000	17,000
Loans	1,856,000	1,829,000
Financial liabilities:
Long-term debt	3,053,000	3,145,000
Variable Interest Entity, Primary Beneficiary [Member] | Fair Value, Recurring [Member] | Corporate Debt Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	2,003,000	1,828,000
Variable Interest Entity, Primary Beneficiary [Member] | Fair Value, Recurring [Member] | Municipal Bonds [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Fixed maturity securities, at fair value	100,000	96,000
Variable Interest Entity, Primary Beneficiary [Member] | Fair Value, Recurring [Member] | Interest Rate Swap [Member]
Financial assets:
Derivative assets	198,000	190,000
Financial liabilities:
Derivative liabilities	1,174,000	1,048,000
Variable Interest Entity, Primary Beneficiary [Member] | Fair Value, Recurring [Member] | Currency Swaps [Member]
Financial assets:
Derivative assets	45,000	49,000
Variable Interest Entity, Primary Beneficiary [Member] | Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Debt Securities, Trading	$ 16,000	$ 43,000

XML

Fair Value Measurements - Additional Information (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Derivative Credit Risk Valuation Adjustment, Derivative Liabilities	$ 283	$ 19
Derivative liabilities	$ 44,000	$ 38,000
Weighted average discounted rate of estimated future premium payments to be paid by the VIEs	3.00%	3.00%
Derivative assets	$ 31,000	$ 27,000
Derivative assets	31,000	28,000
Warrants [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Derivative assets	1,000	1,000
Fair Value Measured at Net Asset Value Per Share [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Other investments	$ 480,000	$ 494,000
Fixed Income Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Percentage of investment portfolio valued using dealer quotes	5.00%	5.00%
Minimum [Member] | Fixed Income Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Percentage of investment portfolio valued using internal valuation models	4.00%	4.00%
Maximum [Member] | Fixed Income Securities [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Percentage of investment portfolio valued using external pricing services	91.00%	91.00%
Variable Interest Entity, Primary Beneficiary [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Derivative liabilities	$ 1,174,000	$ 1,048,000
Weighted average discounted rate of estimated future premium payments to be paid by the VIEs	6.30%	6.80%
Derivative assets	$ 243,000	$ 239,000
Derivative assets	$ 243,000	$ 239,000

XML

Fair Value Measurements - Information about Valuation Inputs for Fixed Income Securities Classified as Level 3 (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair Value Inputs Yield Rate	11.60%		11.30%
Asset-backed Securities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Coupon rate	5.98%		5.98%
Fair Value Inputs Maturity	13 years 3 months 18 days		13 years 5 months 15 days
Yield	12.00%		12.60%
Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability	$ 3,972	$ 5,738	$ 3,762	$ 6,199
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Settlements	(74)	(80)
Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss)	196	(204)
Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI	87	(176)
Fair Value, Inputs, Level 3 [Member] | Investments [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability	81	86	$ 79	91
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Settlements	0	(1)
Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI	3	$ (4)
Corporate Obligations [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair Value Inputs Maturity		1 year 6 months	1 year 9 months
Derivative Financial Instruments, Liabilities [Member] | Fair Value, Inputs, Level 3 [Member] | Derivative Financial Instruments, Liabilities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability	31	$ 52	$ 26	70
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Settlements	0	(2)
Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss)	5	(17)
Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI	0	0
Variable Interest Entity, Primary Beneficiary [Member] | Investment Contracts [Member] | Fair Value, Inputs, Level 3 [Member] | Corporate Obligations [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability	2,003	3,131	1,828	3,320
Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss)	133	(93)
Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI	43	(96)
Variable Interest Entity, Primary Beneficiary [Member] | Loan Origination Commitments [Member] | Fair Value, Inputs, Level 3 [Member] | Loans Receivable [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability	1,856	2,469	$ 1,829	$ 2,718
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Settlements	(73)	(78)
Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss)	59	(96)
Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI	$ 42	$ (76)

XML

Fair Value Measurements - Summary of Information about Described Model Inputs Used to Determine Fair Value of Each Class of Credit Derivatives (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair value of derivative liabilities	$ 43
Variable Interest Entity, Primary Beneficiary [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair value of derivative liabilities	0
Real Estate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Other investments	22	$ 22
Interest Rate Contract [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Other investments	84	80
Illiquid Investments [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Other investments	$ 87	$ 84
Asset-backed Securities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair Value Inputs Coupon Rate	5.98%	5.98%
Fair Value Inputs Maturity	13 years 3 months 18 days	13 years 5 months 15 days
Fair Value Inputs Yield	12.00%	12.60%

XML

Fair Value Measurements - Information about Valuation Inputs for Variable Interest Entity Assets and Liabilities Classified as Level 3 (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Variable Interest Entity, Primary Beneficiary [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Estimated Future Premium Payments Minimum Discounted Rate	5.50%		5.80%
Estimated Future Premium Payments Maximum Discounted Rate	7.30%		8.50%
Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability	$ 3,972	$ 5,738	$ 3,762	$ 6,199
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Earnings	196	(204)
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Other Comprehensive Income Loss	87	(176)
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Settlements	(74)	(80)
Fair Value, Inputs, Level 3 [Member] | Investments [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability	81	86	79	91
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Earnings	0	0
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Other Comprehensive Income Loss	3	(4)
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Settlements	0	(1)
Loan Origination Commitments [Member] | Fair Value, Inputs, Level 3 [Member] | Loans Receivable [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability	1,856	2,469	1,829	2,718
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Earnings	59	(96)
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Other Comprehensive Income Loss	42	(76)
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Settlements	(73)	(78)
Derivative Financial Instruments, Liabilities [Member] | Fair Value, Inputs, Level 3 [Member] | Derivative Financial Instruments, Liabilities [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability	31	52	26	70
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Earnings	5	(17)
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Settlements	0	(2)
Investment Contracts [Member] | Fair Value, Inputs, Level 3 [Member] | Corporate Debt Securities [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability	2,003	3,131	$ 1,828	$ 3,320
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Earnings	133	(93)
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Gain Loss Included In Other Comprehensive Income Loss	$ 43	$ (96)

XML

Fair Value Measurements - Summary of Changes in Level 3 Fair Value Category (Details) $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($) level3FinancialInstruments	Mar. 31, 2022 USD ($) level3FinancialInstruments
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis Asset or Liability, Transfers into or out of Level 3 | level3FinancialInstruments	0	0
Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Settlements	$ (74)	$ (80)
Level 3 [Member] | Loans Receivable [Member] | Loans [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Settlements	(73)	(78)
Level 3 [Member] | Investments [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Settlements	0	(1)
Level 3 [Member] | Derivative Financial Instruments, Liabilities [Member] | Derivative Financial Instruments, Liabilities [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liability Settlements	$ 0	$ (2)

XML

Fair Value Measurements - Summary of Gains and Losses (Realized and Unrealized) Relating to Level 3 Assets and Liabilities Included in Earnings (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Net Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total gains or losses included in earnings for the period	$ 0	$ 0
Fair Value Asset Or Liability Measured On Recurring Basis Change In Unrealized Gains Losses Still Held	0	0
Gain (Loss) on Derivative Instruments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total gains or losses included in earnings for the period	5	(17)
Fair Value Asset Or Liability Measured On Recurring Basis Change In Unrealized Gains Losses Still Held	5	(17)
Income Loss On Variable Interest Entities [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total gains or losses included in earnings for the period	191	(188)
Fair Value Asset Or Liability Measured On Recurring Basis Change In Unrealized Gains Losses Still Held	191	(188)
Other Income or (Loss) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total gains or losses included in earnings for the period	0	0
Fair Value Asset Or Liability Measured On Recurring Basis Change In Unrealized Gains Losses Still Held	$ 0	$ 0

XML

Insurance Contracts - Additional Information (Details) $ in Thousands, € in Millions, £ in Millions	3 Months Ended		6 Months Ended	12 Months Ended
	Mar. 31, 2023 USD ($)	Mar. 31, 2022 USD ($)	Jun. 30, 2022	Dec. 31, 2022 USD ($)	Mar. 31, 2023 GBP (£)	Mar. 31, 2023 EUR (€)	Mar. 31, 2022 GBP (£)	Mar. 31, 2022 EUR (€)	Dec. 31, 2021 USD ($)
Insurance [Line Items]
Reinsurance Recoverable Credit Exposure	$ 75,000			$ 60,000
Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Rmbs Subrogation	0			140,000
Financial Guarantee Insurance Contracts, Premium Receivable	$ 256,000	$ 308,000		$ 254,000					$ 320,000
Estimated Future Premium Payments Weighted Average Discounted Rate	3.00%			3.00%	3.00%	3.00%
Reinsurance Payable	$ 38,000			$ 39,000
Weighted average period of future premiums	8 years			8 years
Uncollectable premium receivables	$ 5,000			$ 5,000
Accelerated premium revenue for retired obligations	0	0
Reinsurance recoveries of losses included in losses and loss expenses	(20,000)	(7,000)
Subrogation recoveries, net of reinsurance	0			(140,000)
Amortization of Intangible Assets	7,000	14,000
Intangible assets	321,000			326,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	1,307,000	974,000		$ 1,305,000					$ 1,098,000
Past Due Premiums	$ 0	1,000
Loss Reserves [Member]
Insurance [Line Items]
Weighted average risk-free rate used to discount loss reserves	3.50%		3.90%
United Kingdom, Pounds
Insurance [Line Items]
Financial Guarantee Insurance Contracts, Premium Receivable	$ 75,000	101,000			£ 61		£ 77
Euro Member Countries, Euro
Insurance [Line Items]
Financial Guarantee Insurance Contracts, Premium Receivable	$ 15,000	$ 16,000				€ 13		€ 15

XML

Financial Guarantee Insurance Contracts - Summary of Gross Premium Receivable Roll-Forward (Direct and Assumed Contracts) (Details) $ in Thousands, € in Millions, £ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($)	Mar. 31, 2023 GBP (£)	Mar. 31, 2023 EUR (€)	Mar. 31, 2022 USD ($)	Mar. 31, 2022 GBP (£)	Mar. 31, 2022 EUR (€)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Insurance [Line Items]
Allowance for Doubtful Accounts, Premiums and Other Receivables	$ 5,000			$ 8,000			$ 5,000	$ 9,000
Financial Guarantee Insurance Contracts, Accelerated Premium Revenue, Amount	0			0
Past Due Premiums Receivable	0						0
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Beginning premium receivable	254,000			320,000
Premium receipts	9,000			15,000
Adjustments for changes in expected and contractual cash flows	7,000			3,000
Accretion of premium receivable discount	2,000			2,000
Uncollectable premiums	0			1,000
Other adjustments (including foreign exchange)	2,000			(3,000)
Ending premium receivable	256,000			308,000
Premium Receivable, Allowance for Credit Loss	5,000						5,000
Premium Receivable, Credit Loss Expense (Reversal)	0			(1,000)
Premium Receivable, Allowance for Credit Loss, Writeoff	0			0
Premium Receivable, Allowance for Credit Loss, Recovery	0			0
Financing Receivable, 90 Days or More Past Due, Still Accruing	0						0
Premiums Receivable, Gross	261,000						259,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	1,307,000			974,000			1,305,000	$ 1,098,000
Premiums Receivable, Net	272,000						269,000
Real Estate [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Other investments	22,000						22,000
Real Estate [Member] | Foreign Exchange
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Other adjustments (including foreign exchange)	2,000			(4,000)
Specialty Property & Casualty Program
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	17,000						16,000
Public Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	148,000						150,000
Structured Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	23,000						24,000
International Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	90,000						85,000
I/SL [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	218,000						217,000
I/SL [Member] | Public Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	140,000						142,000
I/SL [Member] | Structured Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	4,000						5,000
I/SL [Member] | International Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	74,000						70,000
IA [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	10,000						10,000
IA [Member] | Public Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	3,000						3,000
IA [Member] | Structured Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	1,000						1,000
IA [Member] | International Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	7,000						7,000
II [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	5,000						5,000
II [Member] | Public Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	5,000						5,000
II [Member] | Structured Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	0						0
II [Member] | International Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	0						0
III [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	16,000						16,000
III [Member] | Public Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	0						0
III [Member] | Structured Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	7,000						7,000
III [Member] | International Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	9,000						9,000
IV [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	11,000						11,000
IV [Member] | Public Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	0						0
IV [Member] | Structured Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	11,000						11,000
IV [Member] | International Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	0						0
United Kingdom, Pounds
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Ending premium receivable	75,000	£ 61		101,000	£ 77
Euro Member Countries, Euro
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Ending premium receivable	15,000		€ 13	$ 16,000		€ 15
Other Public Finance Sectors [Member] | Public Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	2,000						2,000
Other Public Finance Sectors [Member] | I/SL [Member] | Public Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	2,000						2,000
Other Public Finance Sectors [Member] | IA [Member] | Public Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	0						0
Other Public Finance Sectors [Member] | II [Member] | Public Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	0						0
Other Public Finance Sectors [Member] | III [Member] | Public Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	0						0
Other Public Finance Sectors [Member] | IV [Member] | Public Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	0						0
Other International [Member] | International Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	3,000						2,000
Other International [Member] | I/SL [Member] | International Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	3,000						2,000
Other International [Member] | IA [Member] | International Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	0						0
Other International [Member] | II [Member] | International Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	0						0
Other International [Member] | III [Member] | International Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	0						0
Other International [Member] | IV [Member] | International Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	0						0
Mortgage Backed And Home Equity [Member] | Structured Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	12,000						11,000
Mortgage Backed And Home Equity [Member] | I/SL [Member] | Structured Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	0						0
Mortgage Backed And Home Equity [Member] | IA [Member] | Structured Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	0						0
Mortgage Backed And Home Equity [Member] | II [Member] | Structured Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	0						0
Mortgage Backed And Home Equity [Member] | III [Member] | Structured Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	0						0
Mortgage Backed And Home Equity [Member] | IV [Member] | Structured Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	11,000						11,000
Student Loans [Member] | Structured Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	8,000						8,000
Student Loans [Member] | I/SL [Member] | Structured Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	1,000						1,000
Student Loans [Member] | IA [Member] | Structured Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	1,000						1,000
Student Loans [Member] | II [Member] | Structured Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	0						0
Student Loans [Member] | III [Member] | Structured Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	7,000						7,000
Student Loans [Member] | IV [Member] | Structured Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	0						0
Other Structured Finance [Member] | Structured Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	3,000						4,000
Other Structured Finance [Member] | I/SL [Member] | Structured Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	3,000						4,000
Other Structured Finance [Member] | IA [Member] | Structured Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	0						0
Other Structured Finance [Member] | II [Member] | Structured Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	0						0
Other Structured Finance [Member] | III [Member] | Structured Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	0						0
Other Structured Finance [Member] | IV [Member] | Structured Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	0						0
Sovereign And Sub Sovereign [Member] | International Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	69,000						64,000
Sovereign And Sub Sovereign [Member] | I/SL [Member] | International Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	53,000						49,000
Sovereign And Sub Sovereign [Member] | IA [Member] | International Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	7,000						7,000
Sovereign And Sub Sovereign [Member] | II [Member] | International Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	0						0
Sovereign And Sub Sovereign [Member] | III [Member] | International Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	9,000						9,000
Sovereign And Sub Sovereign [Member] | IV [Member] | International Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	0						0
Investor Owned And Public Utilities [Member] | International Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	18,000						18,000
Investor Owned And Public Utilities [Member] | I/SL [Member] | International Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	18,000						18,000
Investor Owned And Public Utilities [Member] | IA [Member] | International Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	0						0
Investor Owned And Public Utilities [Member] | II [Member] | International Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	0						0
Investor Owned And Public Utilities [Member] | III [Member] | International Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	0						0
Investor Owned And Public Utilities [Member] | IV [Member] | International Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	0						0
Housing Revenue [Member] | Public Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	146,000						148,000
Housing Revenue [Member] | I/SL [Member] | Public Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	138,000						140,000
Housing Revenue [Member] | IA [Member] | Public Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	3,000						3,000
Housing Revenue [Member] | II [Member] | Public Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	5,000						5,000
Housing Revenue [Member] | III [Member] | Public Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	0						0
Housing Revenue [Member] | IV [Member] | Public Finance [Member]
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward]
Premiums Receivable, Gross	$ 0						$ 0

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Insurance Contracts - Effect of Reinsurance on Premiums Written and Earned (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Direct Premiums Written	$ 61	$ 30
Assumed Reinsurance Premiums Written	0	0
Ceded Reinsurance Premiums Written	43	18
Premiums written, net of reinsurance	(18)	(12)
Direct Premiums Earned	46	23
Assumed Reinsurance Premiums Earned	0	0
Ceded Reinsurance Premiums Earned	$ 32	$ 8

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Insurance Contracts - Summarized Future Gross Undiscounted Premiums Expected to be Collected, and Future Expected Premiums Earned, Net of Reinsurance (Details) $ in Millions	Mar. 31, 2023 USD ($)
Future premiums expected to be collected, June 30. 2021	$ 7
Future premiums expected to be collected, September 30, 2021	7
Future premiums expected to be collected, December 31, 2021	5
Future premiums expected to be collected, December 31, 2022	26
Future premiums expected to be collected, December 31, 2023	25
Future premiums expected to be collected, December 31, 2024	24
Future premiums expected to be collected, December 31, 2025	23
Future premiums expected to be collected, December 31, 2030	98
Future premiums expected to be collected, December 31, 2035	62
Future premiums expected to be collected, December 31, 2040	29
Future premiums expected to be collected, December 31, 2045	14
Future premiums expected to be collected, December 31, 2050	4
Future premiums expected to be collected, December 31, 2055	0
Future premiums expected to be collected, Total	325
Future expected premiums to be earned, net of reinsurance, June 30, 2021	5
Future expected premiums to be earned, net of reinsurance, September 30, 2021	5
Future expected premiums to be earned, net of reinsurance, December 31, 2021	5
Future expected premiums to be earned, net of reinsurance, December 31, 2022	20
Future expected premiums to be earned, net of reinsurance, December 31, 2023	19
Future expected premiums to be earned, net of reinsurance, December 31, 2024	19
Future expected premiums to be earned, net of reinsurance, December 31, 2025	18
Future expected premiums to be earned, net of reinsurance, December 31, 2030	73
Future expected premiums to be earned, net of reinsurance, December 31, 2035	44
Future expected premiums to be earned, net of reinsurance, December 31, 2040	17
Future expected premiums to be earned, net of reinsurance, December 31, 2045	8
Future expected premiums to be earned, net of reinsurance, December 31, 2050	2
Future expected premiums to be earned, net of reinsurance, December 31, 2055	0
Future expected premiums to be earned, net of reinsurance, Total	$ 235

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Insurance Contracts Financial Guarantee Insurance Contracts - Components of Loss and Loss Expense Reserves and Subrogation Recoverable (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Components of Loss and Loss Expense Reserves and Subrogation Recoverable [Line Items]
Ceded Loss And Loss Expenses Paid Not Yet Recovered		$ 0
Policyholder Benefits and Claims Incurred, Ceded	$ 20	7
Subrogation recoverable	(146)		$ (271)
Claim liability reported on Balance Sheet, before reinsurance	598		444
Liability for Claims and Claims Adjustment Expense	851		805
Liability for Claim and Claim Adjustment Expenses Net of Subrogation recoverables	705	$ (647)	534	$ (522)
Property and Casualty, Commercial Insurance
Components of Loss and Loss Expense Reserves and Subrogation Recoverable [Line Items]
Liability for Claims and Claims Adjustment Expense	107		90
Liability for Claim and Claim Adjustment Expenses Net of Subrogation recoverables	107		90
Present Value of Expected Net Cash Flows- Claims and Loss Expenses [Member]
Components of Loss and Loss Expense Reserves and Subrogation Recoverable [Line Items]
Subrogation recoverable	2		5
Claim liability reported on Balance Sheet, before reinsurance	824		791
Liability for Claims and Claims Adjustment Expense	822		787
Present Value of Expected Net Cash Flows-Recoveries [Member]
Components of Loss and Loss Expense Reserves and Subrogation Recoverable [Line Items]
Subrogation recoverable	(148)		(276)
Claim liability reported on Balance Sheet, before reinsurance	(196)		(319)
Liability for Claims and Claims Adjustment Expense	(48)		(44)
Unearned Premium Reserve [Member]
Components of Loss and Loss Expense Reserves and Subrogation Recoverable [Line Items]
Subrogation recoverable	0		0
Claim liability reported on Balance Sheet, before reinsurance	(30)		(28)
Liability for Claims and Claims Adjustment Expense	$ (30)		$ (28)

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Insurance Contracts - Summary of Loss Reserve Roll-Forward, Net of Subrogation Recoverable and Reinsurance (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Loss And Loss Adjustment Expense Reserves [Line Items]
Impact of VIE Consolidation on Gross Loss and Loss Reserves	$ 0	$ 292
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Beginning balance of net loss and loss expense reserves	419	(578)
Current Year Claims and Claims Adjustment Expense	2	1
Prior Year Claims and Claims Adjustment Expense	16	23
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims	18	24
Claim and loss expense payments, net of subrogation and reinsurance	0	0
Claim and loss expense (payments) recoveries, net of subrogation and reinsurance	141	150
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid	(141)	(150)
Liability for Unpaid Claims and Claims Adjustment Expense, Foreign Currency Translation Gain (Loss)	0	(1)
Liability for Unpaid Claims and Claims Adjustment Expense, Net	578	(404)	$ 419	$ (578)
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments	127	49	115	56
Policyholder Benefits and Claims Incurred, Ceded	20	7
Net Incurred RMBS Subrogation Recoveries	0	(224)
Ceded Loss And Loss Expenses Paid Not Yet Recovered		0
Liability for Claim and Claim Adjustment Expenses Net of Subrogation recoverables	705	$ (647)	534	$ (522)
Financial Guarantee
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Ceded Loss And Loss Expenses Paid Not Yet Recovered	0		0
Loss Reserves Ceded To Reinsurers	$ 34		$ 33

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Insurance Contracts - Summary of Information Related to Policies Currently Included in Ambac's Loss Reserves or Subrogation Recoverable (Details) $ in Millions	3 Months Ended	6 Months Ended
	Mar. 31, 2023 USD ($) Policies	Jun. 30, 2022	Dec. 31, 2022 USD ($) Policies	Mar. 31, 2022 USD ($)
Schedule of Insured Financial Obligations with Credit Deterioration [Line Items]
Ceded Loss And Loss Expenses Paid Not Yet Recovered				$ 0
Number of policies | Policies	168		162
Remaining weighted-average contract period (in years)	12 years	14 years
Gross insured contractual payments outstanding:
Principal	$ 4,185		$ 4,047
Interest	1,872		1,750
Total	6,058		5,797
Gross undiscounted claim liability	1,272		1,279
Discount, gross claim liability	455		496
Gross claim liability before all subrogation and before reinsurance	(818)		783
Less:
Gross RMBS subrogation			(140)
Discount, RMBS subrogation			0
Discounted RMBS subrogation, before reinsurance	0		(140)
Less:
Gross other subrogation	(254)		(233)
Discount, other subrogation	59		54
Discounted other subrogation, before reinsurance	(196)		(179)
Gross claim liability, net of all subrogation and discounts, before reinsurance	(622)		464
Less: Unearned premium reserves	(30)		(28)
Plus: Loss adjustment expenses reserves	6		8
Claim liability reported on Balance Sheet, before reinsurance	598		444
Reinsurance recoverable reported on Balance Sheet	34		33
Financial Guarantee
Schedule of Insured Financial Obligations with Credit Deterioration [Line Items]
Ceded Loss And Loss Expenses Paid Not Yet Recovered	3
Financial Guarantee
Schedule of Insured Financial Obligations with Credit Deterioration [Line Items]
Loss Reserves Ceded To Reinsurers	34		33
Ceded Loss And Loss Expenses Paid Not Yet Recovered	$ 0		$ 0
I/SL [Member]
Schedule of Insured Financial Obligations with Credit Deterioration [Line Items]
Number of policies | Policies	32		37
Remaining weighted-average contract period (in years)	8 years	7 years
Gross insured contractual payments outstanding:
Principal	$ 570		$ 709
Interest	487		526
Total	1,057		1,235
Gross undiscounted claim liability	3		4
Discount, gross claim liability	0		1
Gross claim liability before all subrogation and before reinsurance	(3)		3
Less:
Gross RMBS subrogation			0
Discount, RMBS subrogation			0
Discounted RMBS subrogation, before reinsurance			0
Less:
Gross other subrogation	(14)		(14)
Discount, other subrogation	2		2
Discounted other subrogation, before reinsurance	(11)		(12)
Gross claim liability, net of all subrogation and discounts, before reinsurance	9		9
Less: Unearned premium reserves	(1)		(2)
Plus: Loss adjustment expenses reserves	1		1
Claim liability reported on Balance Sheet, before reinsurance	(9)		(10)
Reinsurance recoverable reported on Balance Sheet	$ 1		$ 1
IA [Member]
Schedule of Insured Financial Obligations with Credit Deterioration [Line Items]
Number of policies | Policies	7		6
Remaining weighted-average contract period (in years)	15 years	19 years
Gross insured contractual payments outstanding:
Principal	$ 514		$ 200
Interest	338		198
Total	852		399
Gross undiscounted claim liability	7		4
Discount, gross claim liability	1		1
Gross claim liability before all subrogation and before reinsurance	(6)		3
Less:
Gross RMBS subrogation			0
Discount, RMBS subrogation			0
Discounted RMBS subrogation, before reinsurance			0
Less:
Gross other subrogation	(4)		(4)
Discount, other subrogation	1		0
Discounted other subrogation, before reinsurance	(4)		(3)
Gross claim liability, net of all subrogation and discounts, before reinsurance	(2)		0
Less: Unearned premium reserves	(5)		(2)
Plus: Loss adjustment expenses reserves	1		1
Claim liability reported on Balance Sheet, before reinsurance	(2)		(2)
Reinsurance recoverable reported on Balance Sheet	$ 0		$ 0
II [Member]
Schedule of Insured Financial Obligations with Credit Deterioration [Line Items]
Number of policies | Policies	10		9
Remaining weighted-average contract period (in years)	12 years	14 years
Gross insured contractual payments outstanding:
Principal	$ 1,056		$ 459
Interest	297		286
Total	1,353		745
Gross undiscounted claim liability	59		43
Discount, gross claim liability	8		7
Gross claim liability before all subrogation and before reinsurance	(50)		36
Less:
Gross RMBS subrogation			0
Discount, RMBS subrogation			0
Discounted RMBS subrogation, before reinsurance			0
Less:
Gross other subrogation	0		0
Discount, other subrogation	0		0
Discounted other subrogation, before reinsurance	0		0
Gross claim liability, net of all subrogation and discounts, before reinsurance	(50)		36
Less: Unearned premium reserves	(12)		(5)
Plus: Loss adjustment expenses reserves	1		0
Claim liability reported on Balance Sheet, before reinsurance	40		32
Reinsurance recoverable reported on Balance Sheet	$ 9		$ 8
III [Member]
Schedule of Insured Financial Obligations with Credit Deterioration [Line Items]
Number of policies | Policies	12		12
Remaining weighted-average contract period (in years)	14 years	14 years
Gross insured contractual payments outstanding:
Principal	$ 414		$ 1,000
Interest	149		156
Total	563		1,156
Gross undiscounted claim liability	402		446
Discount, gross claim liability	137		162
Gross claim liability before all subrogation and before reinsurance	(265)		284
Less:
Gross RMBS subrogation			0
Discount, RMBS subrogation			0
Discounted RMBS subrogation, before reinsurance			0
Less:
Gross other subrogation	(30)		(31)
Discount, other subrogation	5		5
Discounted other subrogation, before reinsurance	(26)		(26)
Gross claim liability, net of all subrogation and discounts, before reinsurance	(240)		258
Less: Unearned premium reserves	(1)		(8)
Plus: Loss adjustment expenses reserves	1		2
Claim liability reported on Balance Sheet, before reinsurance	240		252
Reinsurance recoverable reported on Balance Sheet	$ 21		$ 21
IV [Member]
Schedule of Insured Financial Obligations with Credit Deterioration [Line Items]
Number of policies | Policies	102		93
Remaining weighted-average contract period (in years)	12 years	12 years
Gross insured contractual payments outstanding:
Principal	$ 1,597		$ 1,646
Interest	583		565
Total	2,180		2,210
Gross undiscounted claim liability	749		729
Discount, gross claim liability	299		316
Gross claim liability before all subrogation and before reinsurance	(449)		413
Less:
Gross RMBS subrogation			(140)
Discount, RMBS subrogation			0
Discounted RMBS subrogation, before reinsurance			(140)
Less:
Gross other subrogation	(194)		(172)
Discount, other subrogation	48		42
Discounted other subrogation, before reinsurance	(146)		(130)
Gross claim liability, net of all subrogation and discounts, before reinsurance	(303)		143
Less: Unearned premium reserves	(10)		(10)
Plus: Loss adjustment expenses reserves	2		4
Claim liability reported on Balance Sheet, before reinsurance	295		137
Reinsurance recoverable reported on Balance Sheet	$ 3		$ 3
V [Member]
Schedule of Insured Financial Obligations with Credit Deterioration [Line Items]
Number of policies | Policies	5		5
Remaining weighted-average contract period (in years)	6 years	7 years
Gross insured contractual payments outstanding:
Principal	$ 34		$ 34
Interest	19		19
Total	53		53
Gross undiscounted claim liability	53		53
Discount, gross claim liability	9		9
Gross claim liability before all subrogation and before reinsurance	(44)		43
Less:
Gross RMBS subrogation			0
Discount, RMBS subrogation			0
Discounted RMBS subrogation, before reinsurance			0
Less:
Gross other subrogation	(12)		(12)
Discount, other subrogation	3		4
Discounted other subrogation, before reinsurance	(8)		(8)
Gross claim liability, net of all subrogation and discounts, before reinsurance	(36)		35
Less: Unearned premium reserves	(1)		(1)
Plus: Loss adjustment expenses reserves	0		0
Claim liability reported on Balance Sheet, before reinsurance	35		34
Reinsurance recoverable reported on Balance Sheet			$ 0

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Insurance Contracts - Summary of Information Related to Policies Currently Included in Ambac's Loss Reserves or Subrogation Recoverable (Phantom) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Schedule of Insured Financial Obligations with Credit Deterioration [Line Items]
Loss and loss expense reserves	$ 851	$ 805
Subrogation recoverable	(146)	(271)
Liability for Claims	$ 851	$ 805
Ceded Loss And Loss Expenses Paid Not Yet Recovered			$ 0

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Insurance Contracts - Summary of Balance of RMBS Subrogation Recoveries and Related Claim Liabilities, by Estimation Approach (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Schedule Of Balance Of Rmbs Subrogation Recoveries And Related Claim Liabilities By Estimation Approach [Line Items]
Balance Of Rmbs Subrogation Recoveries Net Of Reinsurance	$ 0	$ (140)
Subrogation recoveries	0	$ 140
Nomura Credit & Capital, Inc.
Schedule Of Balance Of Rmbs Subrogation Recoveries And Related Claim Liabilities By Estimation Approach [Line Items]
Proceeds from Legal Settlements	$ 140

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Insurance Contracts Financial Guarantee Insurance Contracts - Summary of Percentage Ceded to Reinsurers and Reinsurance Recoverable and Rating Levels (Details) $ in Millions	Mar. 31, 2022 USD ($)
Insurance [Abstract]
Ceded Loss And Loss Expenses Paid Not Yet Recovered	$ 0

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Insurance - Summary of Percentage Ceded to Reinsurers and Reinsurance Recoverable and Rating Levels (Details) $ in Thousands	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Mar. 31, 2022 USD ($)
Summary of Ceded Par and Net Unsecured Reinsurance Recoverable [Line Items]
Ceded Loss And Loss Expenses Paid Not Yet Recovered			$ 0
Reinsurance Recoverable, Allowance for Credit Loss	$ 66
Reinsurance Recoverables, Gross	130,000
Unsecured Reinsurance Recoverables	75,000
Reinsurance Recoverable, Gross, All Other	23,000
Unsecured Reinsurance Recoverable, All Other	7,000
Letters of Credit Outstanding, Amount	$ 115,000
Number of Reinsurers Covering Majority	3
Percentage of Ceded Reinsurance Recoverable Represented by Top Three	82.60%
Uncollateralized Credit Exposure Supoorted by Unlimited Uncapped Indemnity	$ 43,000	$ 45,000
Deferred Ceded Premiums And Reinsurance Recoverables	265,000
Financial Guarantee
Summary of Ceded Par and Net Unsecured Reinsurance Recoverable [Line Items]
Ceded Loss And Loss Expenses Paid Not Yet Recovered	0	$ 0
QBE Insurance Corporation | Property and Casualty, Commercial Insurance
Summary of Ceded Par and Net Unsecured Reinsurance Recoverable [Line Items]
Reinsurance Recoverables, Gross	40,000
Unsecured Reinsurance Recoverables	40,000
Assured Guaranty Re Ltd | Financial Guarantee
Summary of Ceded Par and Net Unsecured Reinsurance Recoverable [Line Items]
Reinsurance Recoverables, Gross	30,000
Unsecured Reinsurance Recoverables	0
General Reinsurance Company | Property and Casualty, Commercial Insurance
Summary of Ceded Par and Net Unsecured Reinsurance Recoverable [Line Items]
Reinsurance Recoverables, Gross	37,000
Unsecured Reinsurance Recoverables	$ 27,000

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Insurance Contracts - Premium Earned (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Insurance [Line Items]
Premiums Earned, Net	$ 14	$ 15
Direct Premiums Written	61	30
Direct Premiums Earned	46	23
Assumed Reinsurance Premiums Written	0	0
Assumed Reinsurance Premiums Earned	0	0
Ceded Premiums Written	43	18
Ceded Reinsurance Premiums Earned	32	8
Premiums Written, Net	18	12
Premiums Receivable, Net	$ 272		$ 269
Estimated Future Premium Payments Weighted Average Discounted Rate	3.00%		3.00%
Weighted average period of future premiums	8 years		8 years
Reportable Geographical Components [Member] | United States [Member]
Insurance [Line Items]
Premiums Earned, Net	$ 11	9
Reportable Geographical Components [Member] | United Kingdom [Member]
Insurance [Line Items]
Premiums Earned, Net	2	4
Reportable Geographical Components [Member] | Other International [Member]
Insurance [Line Items]
Premiums Earned, Net	$ 0	$ 1

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Derivative Instruments - Summary of Gross Fair Values of Individual Derivative Instruments (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Derivatives, Fair Value [Line Items]
Derivative, Collateral, Right to Reclaim Cash	$ 9	$ 6
Net Amounts of Assets Presented in the Consolidated Balance Sheet, Derivative Assets	31	27
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	0	0
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet, Derivative Liabilities	44	38
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	43
Gross Amount of Collateral Received/Pledged Not Offset in the Consolidated Balance Sheet, Derivative Liabilities		38
Net Amount, Derivative Assets	31	27
Derivative Asset, Fair Value, Gross Asset	31	28
Derivative Asset, Fair Value, Amount Offset Against Collateral	0	0
Derivative liabilities	44	38
Derivative Liability, Fair Value, Amount Offset Against Collateral	0	0
Derivative Liabilities Net Amount	0	0
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Net Amounts of Assets Presented in the Consolidated Balance Sheet, Derivative Assets	30	27
Derivative Asset, Fair Value, Amount Not Offset Against Collateral		0
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet, Derivative Liabilities	44	38
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	43	38
Net Amount, Derivative Assets	30	27
Derivative Asset, Fair Value, Gross Asset	30	27
Derivative Asset, Fair Value, Amount Offset Against Collateral	0	0
Derivative liabilities	44	38
Derivative Liability, Fair Value, Amount Offset Against Collateral	0	0
Derivative Liabilities Net Amount	0	0
Warrants [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	1	1
Derivative Asset, Fair Value, Gross Asset	1	1
Derivative Asset, Fair Value, Amount Offset Against Collateral	0	0
Variable Interest Entity, Primary Beneficiary [Member]
Derivatives, Fair Value [Line Items]
Net Amounts of Assets Presented in the Consolidated Balance Sheet, Derivative Assets	243	239
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	243	0
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet, Derivative Liabilities	1,174	1,048
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	0
Gross Amount of Collateral Received/Pledged Not Offset in the Consolidated Balance Sheet, Derivative Liabilities		0
Net Amount, Derivative Assets	0	239
Derivative Asset, Fair Value, Gross Asset	243	239
Derivative Asset, Fair Value, Amount Offset Against Collateral	0	0
Derivative liabilities	1,174	1,048
Derivative Liability, Fair Value, Amount Offset Against Collateral	0	0
Derivative Liabilities Net Amount	1,174	1,048
Variable Interest Entity, Primary Beneficiary [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Net Amounts of Assets Presented in the Consolidated Balance Sheet, Derivative Assets	198	190
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	198
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet, Derivative Liabilities	1,174	1,048
Net Amount, Derivative Assets	0	190
Derivative Asset, Fair Value, Gross Asset	198	190
Derivative Asset, Fair Value, Amount Offset Against Collateral	0	0
Derivative liabilities	1,174	1,048
Derivative Liabilities Net Amount	1,174	1,048
Variable Interest Entity, Primary Beneficiary [Member] | Currency Swaps [Member]
Derivatives, Fair Value [Line Items]
Net Amounts of Assets Presented in the Consolidated Balance Sheet, Derivative Assets	45	49
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	45	0
Net Amount, Derivative Assets	0	49
Derivative Asset, Fair Value, Gross Asset	45	$ 49
Derivative Asset, Fair Value, Amount Offset Against Collateral	$ 0

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Derivative Instruments - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	May 01, 2013
Schedule Of Loans And Allowance For Loan By Class Individually And Collectively Evaluated For Impairment [Line Items]
Value of right to reclaim cash collateral and posted margin, recorded in Other assets	$ 9		$ 6
Gains in change in fair value of the call options	(4)	$ 57
Net liability fair value of all derivative instruments linked to Ambac's own credit risk	43		38
Fair value of posted assets as collateral	$ 58		54
Warrants outstanding	4,876,114
Exercise price of common stock				$ 16.67
Derivative assets	$ 31		28
Variable Interest Entity, Primary Beneficiary [Member]
Schedule Of Loans And Allowance For Loan By Class Individually And Collectively Evaluated For Impairment [Line Items]
Value of obligation to return cash collateral, recorded in "Other liabilities"	254		0
Derivative assets	243		239
Warrants [Member]
Schedule Of Loans And Allowance For Loan By Class Individually And Collectively Evaluated For Impairment [Line Items]
Derivative assets	$ 1		$ 1

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Derivative Instruments - Summary of Location and Amount of Gains and Losses of Derivative Contracts (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Debt and Equity Securities, FV-NI [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ (4)	$ 57
Derivative, Gain (Loss) on Derivatives, Total Net	(105)	68
Net gains (losses) on derivative contracts [Domain] | Interest Rate Swap [Member]
Debt and Equity Securities, FV-NI [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(3)	30
Net gains (losses) on derivative contracts [Domain] | Futures Contracts [Member]
Debt and Equity Securities, FV-NI [Line Items]
Derivative, Gain (Loss) on Derivative, Net	0	27
Net gains (losses) on derivative contracts [Domain] | Warrants [Member]
Debt and Equity Securities, FV-NI [Line Items]
Derivative, Gain (Loss) on Derivative, Net	0	0
Income Loss On Variable Interest Entities [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Debt and Equity Securities, FV-NI [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(102)	11
Income Loss On Variable Interest Entities [Member] | Interest Rate Swap [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Debt and Equity Securities, FV-NI [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(3)	5
Income Loss On Variable Interest Entities [Member] | Currency Swaps [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Debt and Equity Securities, FV-NI [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ (99)	$ 6

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Derivative Instruments - Summary of Notional Amounts of AFS's Trading Derivative Products (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
AFS [Member] | Interest Rate Swap [Member]
Schedule Of Loans And Allowance For Loan By Class Individually And Collectively Evaluated For Impairment [Line Items]
Derivative products, Notional Amount	$ 332	$ 337
AFS [Member] | Interest Rate Swaps-Pay-Fixed/Receive-Variable [Member]
Schedule Of Loans And Allowance For Loan By Class Individually And Collectively Evaluated For Impairment [Line Items]
Derivative products, Notional Amount	861	989
Variable Interest Entity, Primary Beneficiary [Member] | Interest Rate Swap [Member]
Schedule Of Loans And Allowance For Loan By Class Individually And Collectively Evaluated For Impairment [Line Items]
Derivative products, Notional Amount	1,609	1,573
Variable Interest Entity, Primary Beneficiary [Member] | Interest Rate Swaps-Pay-Fixed/Receive-Variable [Member]
Schedule Of Loans And Allowance For Loan By Class Individually And Collectively Evaluated For Impairment [Line Items]
Derivative products, Notional Amount	$ 890	$ 887

XML

Derivative Instruments - Summary of Notional for VIE Derivatives Outstanding (Details) - Variable Interest Entity, Primary Beneficiary [Member] - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Interest Rate Swap [Member]
Schedule Of Loans And Allowance For Loan By Class Individually And Collectively Evaluated For Impairment [Line Items]
Derivative products, Notional Amount	$ 1,609	$ 1,573
Interest Rate Swaps-Pay-Fixed/Receive-Variable [Member]
Schedule Of Loans And Allowance For Loan By Class Individually And Collectively Evaluated For Impairment [Line Items]
Derivative products, Notional Amount	890	887
Currency Swaps [Member]
Schedule Of Loans And Allowance For Loan By Class Individually And Collectively Evaluated For Impairment [Line Items]
Derivative products, Notional Amount	$ 169	$ 176

XML

Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Intangible assets	$ 321		$ 326
Amortization of Intangible Assets	7	$ 14
Finite-Lived Intangible Assets, Net	307		312
PWIC
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	14		14
Insurance Intangible Asset [Member]
Intangible Assets, Gross (Excluding Goodwill)	1,251		1,247
Finite-Lived Intangible Assets, Accumulated Amortization	990		981
Intangible assets	261		266
Other Intangible Assets
Intangible Assets, Gross (Excluding Goodwill)	52		52
Finite-Lived Intangible Assets, Accumulated Amortization	7		6
Intangible assets	$ 46		$ 47

XML

Special Purpose Entities, Including Variable Interest Entities - Additional Information (Details)	3 Months Ended
	Mar. 31, 2023 USD ($) Entity consolidationVIE	Mar. 31, 2022 USD ($) consolidationVIE	Dec. 31, 2022 USD ($) Entity
Variable Interest Entities [Line Items]
Variable Interest Entity Change in Fair Value of Assets and Liabilities	$ 3,000,000	$ (1,000,000)
Realized Investment Gains (Losses)	(4,000,000)	10,000,000
Other Operating Income (Expense), Net	3,000,000	2,000,000
Fair value of special purpose entities	0
Variable Interest Entity, Measure of Activity, Income or Loss before Tax	(1,000,000)	$ 22,000,000
Long-term debt	$ 497,000,000		$ 639,000,000
Number of Variable Interest Entities Consolidated During the Period	0	2
Number of Variable Interest Entities Deconsolidated During Period | consolidationVIE	1	0
Gain (loss) from consolidating VIEs	$ 0	$ 28,000,000
Number of Trusts Established Resulting From Puerto Rico Restructuring Transaction	2
Variable Interest Entity Deconsolidation Gain Loss	$ 0
Consolidated Entities [Member]
Variable Interest Entities [Line Items]
Number Of Consolidated Variable Interest Entities | Entity	8		9
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entities [Line Items]
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Reclassification Adjustment from AOCI for Derecognition, before Tax	$ 0	(1,000,000)
VIE Change in FV of Assets Liabilities, Net of Credit Risk Change	3,000,000	(1,000,000)
Gross Investment Income, Operating	2,000,000	(4,000,000)
Interest Expense, Long-term Debt	(5,000,000)	(2,000,000)
Long-term debt	$ 3,060,000,000		$ 3,107,000,000
Ambac UK [Member] | Consolidated Entities [Member]
Variable Interest Entities [Line Items]
Number Of Consolidated Variable Interest Entities | Entity	4		5
Ambac UK [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entities [Line Items]
Long-term debt	$ 2,869,000,000		$ 2,788,000,000
Ambac Assurance [Member] | Consolidated Entities [Member]
Variable Interest Entities [Line Items]
Number Of Consolidated Variable Interest Entities | Entity	4		4
Ambac Assurance [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entities [Line Items]
Long-term debt	$ 191,000,000		$ 319,000,000
Fixed Income Investments [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entities [Line Items]
Realized Investment Gains (Losses)	$ 0	$ 1,000,000

XML

Special Purpose Entities, Including Variable Interest Entities - Summary of Fair Value of Fixed Income Securities, by Asset-Type, Held by Consolidated Variable Interest Entities (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Variable Interest Entities [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	$ 1,983	$ 2,041
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	31	31
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	90	106
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entities [Line Items]
Loans Unpaid Principal Balance	1,975	1,977
Long Term Debt Unpaid Principal Balance	3,088	3,064
Variable Interest Entity, Primary Beneficiary [Member] | Municipal Bonds [Member]
Variable Interest Entities [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	$ 99	$ 99

XML

Special Purpose Entities, Including Variable Interest Entities - Supplemental Information about Loans Held as Assets and Long-Term Debt Associated with Consolidated Variable Interest Entities (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Variable Interest Entities [Line Items]
Long-term debt	$ 497	$ 639
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entities [Line Items]
Long-term debt	3,060	3,107
Long-term debt, Estimated fair value	2,869	2,788
Loans Unpaid Principal Balance	1,975	1,977
Long Term Debt Unpaid Principal Balance	$ 3,088	$ 3,064

XML

Special Purpose Entities, Including Variable Interest Entities - Summary of Carrying Amount of Assets, Liabilities and Maximum Exposure to Loss of Ambac's Variable Interests in Non-Consolidated Variable Interest Entities (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Variable Interest Entities [Line Items]
Maximum Exposure To Loss	$ 21,492	$ 21,639
Insurance Assets	370	490
Insurance Liabilities	881	840
Derivative Liabilities	0
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entities [Line Items]
Derivative Liabilities		1
Global Public Finance [Member]
Variable Interest Entities [Line Items]
Maximum Exposure To Loss	17,907	17,997
Insurance Assets	221	216
Insurance Liabilities	216	212
Derivative Liabilities	0	0
Global Structured Finance [Member]
Variable Interest Entities [Line Items]
Maximum Exposure To Loss	3,585	3,642
Insurance Assets	148	274
Insurance Liabilities	665	628
Derivative Liabilities	0	1
Global Structured Finance [Member] | Residential Mortgage-Backed Securities [Member]
Variable Interest Entities [Line Items]
Maximum Exposure To Loss	2,531	2,559
Insurance Assets	141	266
Insurance Liabilities	437	400
Derivative Liabilities	0	0
Global Structured Finance [Member] | Other Consumer Asset-Backed [Member]
Variable Interest Entities [Line Items]
Maximum Exposure To Loss	630	652
Insurance Assets	5	6
Insurance Liabilities	226	225
Derivative Liabilities	0	0
Global Structured Finance [Member] | Other [Member]
Variable Interest Entities [Line Items]
Maximum Exposure To Loss	424	430
Insurance Assets	2	2
Insurance Liabilities	2	2
Derivative Liabilities	$ 0	$ 1

XML

Variable Interest Entities Special Purpose Entities, including Variable Interest Entities - Summary of Assets and Liabilities (Details) $ in Millions	Mar. 31, 2023 USD ($) Entity	Dec. 31, 2022 USD ($) Entity	Mar. 31, 2022 USD ($)
Debt Securities, Available-for-sale, Amortized Cost	$ 1,983	$ 2,041
Fixed maturity securities, at fair value	1,923
Restricted Cash	10	14	$ 7
Derivative assets	31	27
Other assets	85	84
Total assets	8,219	7,973	11,531
Interest Payable	438	427
Long-term debt	497	639
Derivative Liability	44	38
Other Liabilities	141	163
Liabilities	6,892	6,647
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	31	31
Variable Interest Entity, Primary Beneficiary [Member]
Fixed maturity securities, at fair value	2,119	1,967
Restricted Cash	256	17	$ 49
Financing Receivable, after Allowance for Credit Loss	1,856	1,829
Derivative assets	243	239
Other assets	1	2
Total assets	4,476	4,054
Long-term debt	2,869	2,788
Long-term Debt, at par less amortized discount	191	319
Long-term debt	3,060	3,107
Derivative Liability	1,174	1,048
Other Liabilities	1	5
Liabilities	4,489	4,160
Estimated Future Premium Payments Maximum Discounted Rate	254	0
Variable Interest Entity, Primary Beneficiary [Member] | Corporate Debt Securities [Member]
Fixed maturity securities, at fair value	2,003	1,828
Variable Interest Entity, Primary Beneficiary [Member] | Municipal Bonds [Member]
Debt Securities, Available-for-sale, Amortized Cost	99	99
Fixed maturity securities, at fair value	100	96
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(1)	(4)
Available-for-Sale Securities, Accumulated Gross Unrealized Gain, before Tax	2	1
Variable Interest Entity, Primary Beneficiary [Member] | US States and Political Subdivisions Debt Securities
Fixed maturity securities, at fair value	16	43
Variable Interest Entity, Primary Beneficiary [Member] | Ambac UK [Member]
Fixed maturity securities, at fair value	2,003	1,828
Restricted Cash	255	1
Financing Receivable, after Allowance for Credit Loss	1,856	1,829
Derivative assets	243	239
Other assets	0	0
Total assets	4,358	3,896
Long-term debt	2,869	2,788
Long-term Debt, at par less amortized discount	0	0
Long-term debt	2,869	2,788
Derivative Liability	1,174	1,048
Cash collateral payable	254
Other Liabilities	0	0
Liabilities	4,297	3,836
Estimated Future Premium Payments Maximum Discounted Rate		0
Variable Interest Entity, Primary Beneficiary [Member] | Ambac UK [Member] | Corporate Debt Securities [Member]
Fixed maturity securities, at fair value	2,003	1,828
Variable Interest Entity, Primary Beneficiary [Member] | Ambac UK [Member] | Municipal Bonds [Member]
Fixed maturity securities, at fair value	0	0
Variable Interest Entity, Primary Beneficiary [Member] | Ambac UK [Member] | US States and Political Subdivisions Debt Securities
Fixed maturity securities, at fair value	0	0
Variable Interest Entity, Primary Beneficiary [Member] | Ambac Assurance [Member]
Fixed maturity securities, at fair value	116	139
Restricted Cash	1	16
Financing Receivable, after Allowance for Credit Loss	0	0
Derivative assets	0	0
Other assets	1	2
Total assets	118	157
Long-term debt	0	0
Long-term Debt, at par less amortized discount	191	319
Long-term debt	191	319
Derivative Liability	0	0
Other Liabilities	1	5
Liabilities	192	324
Estimated Future Premium Payments Maximum Discounted Rate	0	0
Variable Interest Entity, Primary Beneficiary [Member] | Ambac Assurance [Member] | Corporate Debt Securities [Member]
Fixed maturity securities, at fair value	0	0
Variable Interest Entity, Primary Beneficiary [Member] | Ambac Assurance [Member] | Municipal Bonds [Member]
Fixed maturity securities, at fair value	100	96
Variable Interest Entity, Primary Beneficiary [Member] | Ambac Assurance [Member] | US States and Political Subdivisions Debt Securities
Fixed maturity securities, at fair value	$ 16	$ 43
Consolidated Entities [Member]
Number Of Consolidated Variable Interest Entities | Entity	8	9
Consolidated Entities [Member] | Ambac UK [Member]
Number Of Consolidated Variable Interest Entities | Entity	4	5
Consolidated Entities [Member] | Ambac Assurance [Member]
Number Of Consolidated Variable Interest Entities | Entity	4	4

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Revenue Recognition and Deferred Revenue (Details) $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2022 USD ($)
Contract with Customer, Liability, Revenue Recognized	$ 0	$ 1
Revenue from Contract with Customer, Excluding Assessed Tax	15	9
Contract with Customer, Receivable, after Allowance for Credit Loss	8		$ 7
Contract with Customer, Asset, after Allowance for Credit Loss	10		5
Contract with Customer, Liability	1		$ 1
Contract with Customer, Performance Obligation Satisfied in Previous Period	3	4
Employer Stop Loss
Revenue from Contract with Customer, Excluding Assessed Tax	5	4
Affinity Products
Revenue from Contract with Customer, Excluding Assessed Tax	5	5
Commercial Auto
Revenue from Contract with Customer, Excluding Assessed Tax	3	0
Product and Service, Other
Revenue from Contract with Customer, Excluding Assessed Tax	$ 1	$ 0
Minimum [Member]
Employee Stop Loss Time When Base Commissions Recognized Begin and End In Months	17
Maximum [Member]
Employee Stop Loss Time When Base Commissions Recognized Begin and End In Months	20

XML

Comprehensive Income - Schedule of Changes in Balances of Each Component of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Changes In Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	$ (253)	$ 58
Other comprehensive income before reclassifications	(33)	127
Amounts reclassified from accumulated other comprehensive income	3	(1)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	36	(127)
Ending Balance	(217)	(70)
Income Tax Expense (Benefit)	4	0
Realized Investment Gains (Losses)	(4)	10
Unrealized Gains (Losses) on Available-for-Sale Securities [Member]
Changes In Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(71)	154
Other comprehensive income before reclassifications	(14)	104
Amounts reclassified from accumulated other comprehensive income	4	(1)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	17	(105)
Ending Balance	(54)	49
Realized Investment Gains (Losses)	4	(1)
Accumulated Translation Adjustment [Member]
Changes In Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(184)	(100)
Other comprehensive income before reclassifications	(16)	23
Amounts reclassified from accumulated other comprehensive income	0	0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	16	(23)
Ending Balance	(168)	(123)
Accumulated Gain (Loss), Financial Liability, Fair Value Option, Attributable to Parent [Member]
Changes In Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(1)	(1)
Other comprehensive income before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive income	0	0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	0	0
Ending Balance	(1)	(1)
Other Postretirement Benefits Plan [Member]
Changes In Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	3	4
Other comprehensive income before reclassifications	(3)	0
Amounts reclassified from accumulated other comprehensive income	0	0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	3	0
Ending Balance	6	4
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gains (Losses) on Available-for-Sale Securities [Member]
Changes In Accumulated Other Comprehensive Income [Roll Forward]
Income Tax Expense (Benefit)	(1)	0
Reclassification out of Accumulated Other Comprehensive Income [Member] | Other Postretirement Benefits Plan [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax	0	0
Changes In Accumulated Other Comprehensive Income [Roll Forward]
Amounts reclassified from accumulated other comprehensive income	0	0
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax	0	0
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	0	0
Income Tax Expense (Benefit)	$ 0	$ 0

XML

Comprehensive Income - Schedule of Amounts Reclassed Out of Each Component of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax expense (benefit)	$ (4)	$ 0
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Unrealized Gain (Loss) Arising During Period, after Tax	0	0
Net of tax and noncontrolling interest	(33)	2
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	3	(1)
Unrealized Gains (Losses) on Available-for-Sale Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net of tax and noncontrolling interest	4	(1)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	4	(1)
Accumulated Gain (Loss), Financial Liability, Fair Value Option, Attributable to Parent [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Unrealized Gain (Loss) Arising During Period, after Tax	0	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0	0
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, before Tax, after Reclassification Adjustment	0	1
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net of tax and noncontrolling interest	3	(1)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gains (Losses) on Available-for-Sale Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax expense (benefit)	1	0
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Gain (Loss), Financial Liability, Fair Value Option, Including Portion Attributable to Noncontrolling Interest [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax expense (benefit)	0	0
Other Postretirement Benefits Plan [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0	0
Other Postretirement Benefits Plan [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax expense (benefit)	0	0
Prior service cost	0	0
Actuarial gains (losses)	0	0
Total before tax	0	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	$ 0	$ 0

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Net Income Per Share - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	May 01, 2013	Apr. 30, 2013
Schedule Of Earnings Per Share [Line Items]
Common stock, shares outstanding	45,321,745
Par value of common stock issued	$ 0.01			$ 0.01
Exercise price of common stock			$ 16.67
Warrants outstanding	4,876,114
Earnings Per Share, Basic	$ (0.73)	$ 0.04
Earnings Per Share, Diluted	$ (0.73)	$ 0.04
Noncontrolling Interest, Change in Redemption Value	$ 0	$ 0
Net Income (Loss) Available to Common Stockholders, Basic	$ (33)	$ 2
Common Stock [Member]
Schedule Of Earnings Per Share [Line Items]
Number of new common stock issued	347,988

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Net Income Per Share - Reconciliation of Common Shares Used for Basic and Diluted Earnings Per Share (Details) - shares	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted average number of common shares used for basic earnings per share	45,564,276	46,731,459
Effect of potential dilutive shares:
Weighted average number of common shares and potential dilutive shares used for diluted earnings per share	45,564,276	47,359,731
Warrants [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	4,876,114	4,877,617
Restricted Stock Units (RSUs) [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	555,354	253,828
Performance Shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	601,033	0
Warrants [Member]
Effect of potential dilutive shares:
Effect of potential dilutive shares	0	0
Restricted Stock Units (RSUs) [Member]
Effect of potential dilutive shares:
Effect of potential dilutive shares	0	82,066
Performance Shares [Member]
Effect of potential dilutive shares:
Effect of potential dilutive shares	0	546,206

XML

Net Income Per Share Schedule of Basic and Dilutive Securities for EPS (Details) - shares	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Weighted Average Number of Shares Outstanding, Basic	45,564,276	46,731,459
Weighted Average Number of Shares Outstanding, Diluted	45,564,276	47,359,731
Restricted Stock Units (RSUs) [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	555,354	253,828
Warrants [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	4,876,114	4,877,617
Performance Shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	601,033	0
Performance Shares [Member]
Weighted Average Number Diluted Shares Outstanding Adjustment	0	546,206
Restricted Stock Units (RSUs) [Member]
Weighted Average Number Diluted Shares Outstanding Adjustment	0	82,066

XML

Income Taxes - Additional Information (Details)	3 Months Ended
	Mar. 31, 2023
Minimum [Member]
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2030
Maximum [Member]
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2044

XML

Income Taxes Income Taxes - Provision for Income Taxes Charged To Income From Continuing Operations (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Provision for Income Taxes [Line Items]
Current Federal Tax Expense (Benefit)	$ 0	$ 0
Income (Loss) from Continuing Operations before Income Taxes, Domestic	(48)	(1)
Current Income Tax Expense (Benefit)	2	2
Deferred Foreign Income Tax Expense (Benefit)	2	(1)
Deferred Income Tax Expense (Benefit)	2	(1)
Income Tax Expense (Benefit)	4	0
Income (Loss) from Continuing Operations before Income Taxes, Foreign	19	4
Current State and Local Tax Expense (Benefit)	0	0
Current Foreign Tax Expense (Benefit)	$ 2	$ 1

XML

Income Taxes Income Taxes - NOL Usage Table (Details) $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($)
Net Income Loss Reconciliation [Line Items]
NOL allocated amount	$ 3,461
Domestic Tax Authority [Member] | Interest Expense
Net Income Loss Reconciliation [Line Items]
NOL allocated amount	$ 310
Minimum [Member]
Net Income Loss Reconciliation [Line Items]
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2030
Maximum [Member]
Net Income Loss Reconciliation [Line Items]
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2044

XML

Income Taxes Schedule of Income Before Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Schedule of Income Before Income Tax, Domestic and Foreign [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Domestic	$ (48)	$ (1)
Income (Loss) from Continuing Operations before Income Taxes, Foreign	19	4
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	$ (29)	$ 3

XML

Label	Element	Value
Goodwill, Acquired During Period	us-gaap_GoodwillAcquiredDuringPeriod	$ 15,000,000