Assured Guaranty (AGO) 10-Q 4 Aug 16 2016 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2016	Aug. 02, 2016
Document And Entity Information [Abstract]
Entity Registrant Name	ASSURED GUARANTY LTD
Entity Central Index Key	1,273,813
Document Type	10-Q
Document Period End Date	Jun. 30, 2016
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		132,122,615
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q2

Consolidated Balance Sheets (un

Consolidated Balance Sheets (unaudited) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Investment portfolio:
Fixed-maturity securities, available-for-sale, at fair value (amortized cost of $9,401 and $10,275)	$ 9,960	$ 10,627
Short-term investments, at fair value	585	396
Other invested assets	170	169
Total investment portfolio	10,715	11,192
Cash	190	166
Premiums receivable, net of commissions payable	623	693
Ceded unearned premium reserve	228	232
Deferred acquisition costs	110	114
Reinsurance recoverable on unpaid losses	82	69
Salvage and subrogation recoverable	323	126
Credit derivative assets	36	81
Deferred tax asset, net	235	276
Current income tax receivable	0	40
Financial guaranty variable interest entities’ assets, at fair value	814	1,261
Funds restricted for CIFG acquisition	451	0
Other assets	285	294
Total assets	14,092	14,544
Liabilities and shareholders’ equity
Unearned premium reserve	3,617	3,996
Loss and loss adjustment expense reserve	1,268	1,067
Reinsurance balances payable, net	56	51
Long-term debt	1,303	1,300
Credit derivative liabilities	432	446
Current income tax payable	19	0
Financial guaranty variable interest entities’ liabilities with recourse, at fair value	790	1,225
Financial guaranty variable interest entities’ liabilities without recourse, at fair value	115	124
Other liabilities	242	272
Total liabilities	7,842	8,481
Commitments and contingencies
Common stock ($0.01 par value, 500,000,000 shares authorized; 132,814,422 and 137,928,552 shares issued and outstanding)	1	1
Additional paid-in capital	1,213	1,342
Retained earnings	4,648	4,478
Accumulated other comprehensive income, net of tax of $147 and $104	383	237
Deferred equity compensation (320,193 and 320,193 shares)	5	5
Total shareholders’ equity	6,250	6,063
Total liabilities and shareholders’ equity	$ 14,092	$ 14,544

Consolidated Balance Sheets (u3

Consolidated Balance Sheets (unaudited) (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Fixed maturity securities, available-for-sale, at fair value	$ 9,401	$ 10,275
Common stock par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	500,000,000	500,000,000
Common stock, shares issued (in shares)	132,814,422	137,928,552
Common stock, shares outstanding (in shares)	132,814,422	137,928,552
Accumulated other comprehensive income, tax provision	$ 147	$ 104
Deferred equity compensation (in shares)	320,193	320,193

Consolidated Statements of Oper

Consolidated Statements of Operations (unaudited) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenues
Net earned premiums	[1]	$ 214	$ 219	$ 397	$ 361
Net investment income		98	98	197	199
Net realized investment gains (losses):
Other-than-temporary impairment losses		(8)	(11)	(28)	(16)
Less: portion of other-than-temporary impairment loss recognized in other comprehensive income		(3)	1	(7)	3
Net impairment loss		(5)	(12)	(21)	(19)
Other net realized investment gains (losses)		15	3	18	26
Net realized investment gains (losses)		10	(9)	(3)	7
Net change in fair value of credit derivatives:
Realized gains (losses) and other settlements		24	8	32	29
Net unrealized gains (losses)		39	82	(29)	185
Net change in fair value of credit derivatives		63	90	3	214
Fair value gains (losses) on committed capital securities		(11)	23	(27)	25
Fair value gains (losses) on financial guaranty variable interest entities		4	5	22	(2)
Bargain purchase gain and settlement of pre-existing relationships		0	214	0	214
Other income (loss)		18	55	52	46
Total revenues		396	695	641	1,064
Expenses
Loss and loss adjustment expenses		102	188	192	206
Amortization of deferred acquisition costs		5	6	9	10
Interest expense		25	26	51	51
Other operating expenses		63	66	123	122
Total expenses		195	286	375	389
Income (loss) before income taxes		201	409	266	675
Provision (benefit) for income taxes
Current		32	24	62	37
Deferred		23	88	(1)	140
Total provision (benefit) for income taxes		55	112	61	177
Net income (loss)		$ 146	$ 297	$ 205	$ 498
Earnings per share:
Basic (in dollars per share)		$ 1.09	$ 1.97	$ 1.52	$ 3.25
Diluted (in dollars per share)		1.09	1.96	1.51	3.23
Dividends (in dollars per share)		$ 0.13	$ 0.12	$ 0.26	$ 0.24
[1]	Excludes $3 million and $5 million for Second Quarter 2016 and 2015, respectively, and $8 million and $10 million for Six Months 2016 and 2015, respectively, related to consolidated FG VIEs.

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 146	$ 297	$ 205	$ 498
Unrealized holding gains (losses) arising during the period on:
Investments with no other-than-temporary impairment, net of tax provision (benefit) of $31, $(54), $62 and $(53)	84	(136)	179	(118)
Investments with other-than-temporary impairment, net of tax provision (benefit) of $(3), $(1), $(13) and $(3)	(6)	(6)	(23)	(8)
Unrealized holding gains (losses) arising during the period, net of tax	78	(142)	156	(126)
Less: reclassification adjustment for gains (losses) included in net income (loss), net of tax provision (benefit) of $4, $(4), $0 and $2	5	(5)	(1)	5
Change in net unrealized gains on investments	73	(137)	157	(131)
Other, net of tax provision	(9)	6	(11)	0
Other comprehensive income (loss)	64	(131)	146	(131)
Comprehensive income (loss)	$ 210	$ 166	$ 351	$ 367

Consolidated Statements of Com6

Consolidated Statements of Comprehensive Income (unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Investments with no other-than-temporary impairment, tax provision (benefit)	$ 31	$ (54)	$ 62	$ (53)
Investments with other-than-temporary impairment, tax provision (benefit)	(3)	(1)	(13)	(3)
Reclassification adjustment for gains (losses) included in net income (loss), tax provision (benefit)	$ 4	$ (4)	$ 0	$ 2

Consolidated Statement of Share

Consolidated Statement of Shareholders' Equity (unaudited) - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Deferred Equity Compensation [Member]
Beginning balance at Dec. 31, 2014					$ 370
Increase (Decrease) in Shareholders' Equity
Net Income	$ 498
Other comprehensive income	(131)
Ending balance at Jun. 30, 2015					239
Beginning balance at Mar. 31, 2015					370
Increase (Decrease) in Shareholders' Equity
Net Income	297
Other comprehensive income	(131)
Ending balance at Jun. 30, 2015					239
Beginning balance (in shares) at Dec. 31, 2015		137,928,552
Beginning balance at Dec. 31, 2015	6,063	$ 1	$ 1,342	$ 4,478	237	$ 5
Increase (Decrease) in Shareholders' Equity
Net Income	205			205
Dividends ($0.26 per share)	(35)			(35)
Common stock repurchases (in shares)		(5,370,402)
Common stock repurchases	(135)		(135)
Share-based compensation and other (in shares)		256,272
Share-based compensation and other	6		6
Other comprehensive income	146				146
Ending balance (in shares) at Jun. 30, 2016		132,814,422
Ending balance at Jun. 30, 2016	6,250	$ 1	1,213	4,648	383	5
Beginning balance at Mar. 31, 2016					319
Increase (Decrease) in Shareholders' Equity
Net Income	146
Other comprehensive income	64
Ending balance (in shares) at Jun. 30, 2016		132,814,422
Ending balance at Jun. 30, 2016	$ 6,250	$ 1	$ 1,213	$ 4,648	$ 383	$ 5

Consolidated Statement of Shar8

Consolidated Statement of Shareholders' Equity (unaudited) (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Stockholders' Equity [Abstract]
Dividends, per share (in dollars per share)	$ 0.13	$ 0.12	$ 0.26	$ 0.24

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Statement of Cash Flows [Abstract]
Net cash flows provided by (used in) operating activities	$ (47)	$ 105
Fixed-maturity securities:
Purchases	(510)	(1,172)
Sales	739	1,381
Maturities	645	411
Net sales (purchases) of short-term investments	(190)	382
Net proceeds from paydowns on financial guaranty variable interest entities’ assets	556	70
Acquisition of Radian Asset, net of cash acquired	0	(800)
Cash restricted for CIFG acquisition	(451)	0
Other	(12)	27
Net cash flows provided by (used in) investing activities	777	299
Financing activities
Dividends paid	(35)	(37)
Repurchases of common stock	(135)	(285)
Share activity under option and incentive plans	(1)	(2)
Net paydowns of financial guaranty variable interest entities’ liabilities	(531)	(78)
Repayment of long-term debt	(1)	(2)
Net cash flows provided by (used in) financing activities	(703)	(404)
Effect of foreign exchange rate changes	(3)	0
Increase (decrease) in cash	24	0
Cash at beginning of period	166	75
Cash at end of period	190	75
Supplemental cash flow information
Income taxes	1	51
Interest	$ 48	$ 48

Business and Basis of Presentat

Business and Basis of Presentation	6 Months Ended
	Jun. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business and Basis of Presentation	Business and Basis of Presentation Business Assured Guaranty Ltd. (“AGL” and, together with its subsidiaries, “Assured Guaranty” or the “Company”) is a Bermuda-based holding company that provides, through its operating subsidiaries, credit protection products to the United States (“U.S.”) and international public finance (including infrastructure) and structured finance markets. The Company applies its credit underwriting judgment, risk management skills and capital markets experience to offer financial guaranty insurance that protects holders of debt instruments and other monetary obligations from defaults in scheduled payments. If an obligor defaults on a scheduled payment due on an obligation, including a scheduled principal or interest payment (“debt service”), the Company is required under its unconditional and irrevocable financial guaranty to pay the amount of the shortfall to the holder of the obligation. The Company markets its financial guaranty insurance directly to issuers and underwriters of public finance and structured finance securities as well as to investors in such obligations. The Company guarantees obligations issued principally in the U.S. and the United Kingdom ("U.K."), and also guarantees obligations issued in other countries and regions, including Australia and Western Europe. In the past, the Company sold credit protection by issuing policies that guaranteed payment obligations under credit derivatives, primarily credit default swaps ("CDS"). Financial guaranty contracts accounted for as credit derivatives are generally structured such that the circumstances giving rise to the Company’s obligation to make loss payments are similar to those for financial guaranty insurance contracts. The Company’s credit derivative transactions are governed by International Swaps and Derivative Association, Inc. (“ISDA”) documentation. The Company has not entered into any new CDS in order to sell credit protection since the beginning of 2009, when regulatory guidelines were issued that limited the terms under which such protection could be sold. The capital and margin requirements applicable under the Dodd-Frank Wall Street Reform and Consumer Protection Act also contributed to the Company not entering into such new CDS since 2009. The Company actively pursues opportunities to terminate existing CDS, which have the effect of reducing future fair value volatility in income and/or reducing rating agency capital charges. Basis of Presentation The unaudited interim consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”) and, in the opinion of management, reflect all adjustments that are of a normal recurring nature, necessary for a fair statement of the financial condition, results of operations and cash flows of the Company and its consolidated variable interest entities (“VIEs”) for the periods presented. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of 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. These unaudited interim consolidated financial statements are as of June 30, 2016 and cover the three-month period ended June 30, 2016 (" Second Quarter 2016 "), the three-month period ended June 30, 2015 (" Second Quarter 2015 "), the six-month period ended June 30, 2016 (" Six Months 2016 ") and the six-month period ended June 30, 2015 (" Six Months 2015 "). Certain financial information that is normally included in annual financial statements prepared in accordance with GAAP, but is not required for interim reporting purposes, has been condensed or omitted. The year-end balance sheet data was derived from audited financial statements. The unaudited interim consolidated financial statements include the accounts of AGL, its direct and indirect subsidiaries (collectively, the “Subsidiaries”), and its consolidated VIEs. Intercompany accounts and transactions between and among all consolidated entities have been eliminated. Certain prior year balances have been reclassified to conform to the current year's presentation. These unaudited interim consolidated financial statements should be read in conjunction with the consolidated financial statements included in AGL’s Annual Report on Form 10-K for the year ended December 31, 2015 , filed with the U.S. Securities and Exchange Commission (the “SEC”). The Company's principal insurance company subsidiaries are: • Assured Guaranty Municipal Corp. ("AGM"), domiciled in New York; • Municipal Assurance Corp. ("MAC"), domiciled in New York; • Assured Guaranty Corp. ("AGC"), domiciled in Maryland; • Assured Guaranty (Europe) Ltd. ("AGE"), organized in the United Kingdom; and • Assured Guaranty Re Ltd. (“AG Re”), domiciled in Bermuda. The Company’s organizational structure includes various holding companies, two of which - Assured Guaranty US Holdings Inc. (“AGUS”) and Assured Guaranty Municipal Holdings Inc. (“AGMH”) - have public debt outstanding. See Note 15, Long-Term Debt and Credit Facilities and Note 18, Subsidiary Information. Future Application of Accounting Standards Credit Losses on Financial Instruments In June 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments . The amendments in this ASU are intended to improve financial reporting by requiring timelier recording of credit losses on loans and other financial instruments held by financial institutions and other organizations. The ASU requires the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. Financial institutions will use forward-looking information to better inform their credit loss estimates as a result of the ASU. While many of the loss estimation techniques applied today will still be permitted, the inputs to those techniques will change to reflect the full amount of expected credit losses. The ASU requires enhanced disclosures to help investors and other financial statement users to better understand significant estimates and judgments used in estimating credit losses, as well as credit quality and underwriting standards of an organization’s portfolio. In addition, the ASU amends the accounting for credit losses on available-for-sale securities and purchased financial assets with credit deterioration. The ASU makes targeted improvements to the existing “other than temporary” impairment model for certain available-for-sale debt securities to eliminate the concept of “other than temporary” from that model. Accordingly, the ASU states that an entity must use an allowance approach, must limit the allowance to an amount at which the security’s fair value is less than its amortized cost basis, may not consider the length of time fair value has been less than amortized cost, and may not consider recoveries in fair value after the balance sheet date when assessing whether a credit loss exists. For purchased financial assets with credit deterioration, the ASU requires an entity’s method for measuring credit losses to be consistent with its method for measuring expected losses for originated and purchased non-credit-deteriorated assets. The ASU is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. For most debt instruments, entities will be required to record a cumulative-effect adjustment to the statement of financial position as of the beginning of the first reporting period in which the guidance is adopted. The changes to the impairment model for available-for-sale securities and changes to purchased financial assets with credit deterioration are to be applied prospectively. For the Company, this would be as of January 1, 2020. Early adoption is permitted for fiscal years, and interim periods with those fiscal years, beginning after December 15, 2018. The Company is currently evaluating the effect on its Consolidated Financial Statements of adopting this ASU. Share-Based Payments In March 2016, the FASB issued ASU 2016-09, Compensation - Stock Compensation (Topic 718) - Improvements to Employee Share-Based Payment , which simplifies several aspects of the accounting for employee share-based payment transactions, including the accounting for income taxes, forfeitures, and statutory tax withholding requirements, as well as classification in the statement of cash flows. The new guidance will require all income tax effects of awards to be recognized in the income statement when the awards vest or are settled. It also will allow an employer to repurchase more of an employee’s shares than it can today for tax withholding purposes without triggering liability accounting and to make a policy election to account for forfeitures as they occur. The ASU is effective for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years, and early adoption is permitted. The Company is currently evaluating the effect on its Consolidated Financial Statements of adopting this ASU.

Acquisitions

Acquisitions	6 Months Ended
	Jun. 30, 2016
Business Combinations [Abstract]
Acquisitions	Acquisitions Consistent with one of its key business strategies of supplementing its book of business through acquisitions, the Company has acquired two financial guaranty companies since January 1, 2015. CIFG Holding Inc. On July 1, 2016, AGC acquired all of the issued and outstanding capital stock of CIFG Holding Inc., the parent of financial guaranty insurer CIFG Assurance North America, Inc. ("CIFG") (the "CIFG Acquisition"), in accordance with the agreement announced on April 13, 2016. AGC transferred $450.6 million in cash to a paying agent on June 30, 2016, in anticipation of closing; the Company recorded this transaction as funds restricted for the CIFG Acquisition on the consolidated balance sheet as of June 30, 2016. AGC caused the acquisition to be consummated on July 1, 2016 and merged CIFG with and into AGC, with AGC as the surviving company, on July 5, 2016. The CIFG Acquisition added $4.4 billion of net par insured on July 1, 2016. The Company is in the process of allocating the purchase price to the assets acquired and liabilities assumed and conforming accounting policies but has not yet completed the acquisition date balance sheet. The Company intends to include this information in its third quarter 2016 Form 10-Q. Radian Asset Assurance Inc. On April 1, 2015, AGC completed the acquisition (“Radian Asset Acquisition”) of all of the issued and outstanding capital stock of financial guaranty insurer Radian Asset Assurance Inc. (“Radian Asset”) for $804.5 million . Radian Asset was merged with and into AGC, with AGC as the surviving company of the merger. The Radian Asset Acquisition added $13.6 billion to the Company's net par outstanding on April 1, 2015. Please refer to Note 2, Acquisition of Radian Asset Assurance Inc., in Part II, Item 8. “Financial Statements and Supplementary Data” of AGL’s Annual Report on Form 10-K for the year ended December 31, 2015 for additional information on the acquisition of Radian Asset, including the purchase price and the allocation of the purchase price to net assets acquired and the resulting bargain purchase gain and the gains on settlement of pre-existing relationships.

Rating Actions

Rating Actions	6 Months Ended
	Jun. 30, 2016
Rating Actions [Abstract]
Rating Actions	Rating Actions When a rating agency assigns a public rating to a financial obligation guaranteed by one of AGL’s insurance company subsidiaries, it generally awards that obligation the same rating it has assigned to the financial strength of the AGL subsidiary that provides the guaranty. Investors in products insured by AGL’s insurance company subsidiaries frequently rely on ratings published by the rating agencies because such ratings influence the trading value of securities and form the basis for many institutions’ investment guidelines as well as individuals’ bond purchase decisions. Therefore, the Company manages its business with the goal of achieving strong financial strength ratings. However, the methodologies and models used by rating agencies differ, presenting conflicting goals that may make it inefficient or impractical to reach the highest rating level. The methodologies and models are not fully transparent, contain subjective elements and data (such as assumptions about future market demand for the Company’s products) and change frequently. Ratings are subject to continuous review and revision or withdrawal at any time. If the financial strength ratings of one (or more) of the Company’s insurance subsidiaries were reduced below current levels, the Company expects it could have adverse effects on the impacted subsidiary's future business opportunities as well as the premiums the impacted subsidiary could charge for its insurance policies. The Company periodically assesses the value of each rating assigned to each of its companies, and as a result of such assessment may request that a rating agency add or drop a rating from certain of its companies. For example, the Kroll Bond Rating Agency ("KBRA") ratings were first assigned to MAC in 2013 and to AGM in 2014 and the A.M. Best Company, Inc. ("Best") rating was first assigned to Assured Guaranty Re Overseas Ltd. ("AGRO") in 2015, while a Moody's Investors Service, Inc. ("Moody's") rating was never requested for MAC and was dropped from AG Re and AGRO in 2015. In the last several years, Standard & Poor's Ratings Services ("S&P") and Moody's have changed, multiple times, their financial strength ratings of AGL's insurance subsidiaries, or changed the outlook on such ratings. More recently, KBRA and Best have assigned financial strength ratings to some of AGL's insurance subsidiaries. The rating agencies' most recent actions related to AGL's insurance subsidiaries are: • On July 27, 2016, S&P affirmed the AA (stable) financial strength ratings of AGL's insurance subsidiaries. • On July 8, 2016 and December 10, 2015, KBRA affirmed the AA+ (stable outlook) financial strength ratings of MAC and AGM, respectively. • On May 27, 2016, Best affirmed the A+ (stable) financial strength rating, which is their second highest rating, of AGRO. • On December 8, 2015, Moody's published credit opinions maintaining its existing insurance financial strength ratings of A2 (stable outlook) on AGM and AGE and A3 (negative outlook) on AGC and AGC's subsidiary Assured Guaranty (UK) Ltd. ("AGUK"). Effective April 8, 2015, at the Company's request, Moody’s withdrew the financial strength ratings it had assigned to AG Re and AGRO. There can be no assurance that any of the rating agencies will not take negative action on their financial strength ratings of AGL's insurance subsidiaries in the future. For a discussion of the effects of rating actions on the Company, see the following: • Note 6, Financial Guaranty Insurance • Note 8, Financial Guaranty Contracts Accounted for as Credit Derivatives • Note 13, Reinsurance and Other Monoline Exposures • Note 15, Long-Term Debt and Credit Facilities

Outstanding Exposure

Outstanding Exposure	6 Months Ended
	Jun. 30, 2016
Outstanding Exposure Disclosure
Outstanding Exposure	Outstanding Exposure The Company’s financial guaranty contracts are written in either insurance or credit derivative form, but collectively are considered financial guaranty contracts. The Company seeks to limit its exposure to losses by underwriting obligations that it views as investment grade at inception, although, as part of its loss mitigation strategy for existing troubled credits, it may underwrite new issuances that it views as below-investment-grade ("BIG"). The Company diversifies its insured portfolio across asset classes and, in the structured finance portfolio, requires rigorous subordination or collateralization requirements. Reinsurance may be used in order to reduce net exposure to certain insured transactions. Public finance obligations insured by the Company consist primarily of general obligation bonds supported by the taxing powers of U.S. state or municipal governmental authorities, as well as tax-supported bonds, revenue bonds and other obligations supported by covenants from state or municipal governmental authorities or other municipal obligors to impose and collect fees and charges for public services or specific infrastructure projects. The Company also includes within public finance obligations those obligations backed by the cash flow from leases or other revenues from projects serving substantial public purposes, including utilities, toll roads, health care facilities and government office buildings. The Company also includes within public finance similar obligations issued by territorial and non-U.S. sovereign and sub-sovereign issuers and governmental authorities. Structured finance obligations insured by the Company are generally issued by special purpose entities, including VIEs, and backed by pools of assets having an ascertainable cash flow or market value or other specialized financial obligations. Some of these VIEs are consolidated as described in Note 9, Consolidated Variable Interest Entities. Unless otherwise specified, the outstanding par and debt service amounts presented in this note include outstanding exposures on VIEs whether or not they are consolidated. Surveillance Categories The Company segregates its insured portfolio into investment grade and BIG surveillance categories to facilitate the appropriate allocation of resources to monitoring and loss mitigation efforts and to aid in establishing the appropriate cycle for periodic review for each exposure. BIG exposures include all exposures with internal credit ratings below BBB-. The Company’s internal credit ratings are based on internal assessments of the likelihood of default and loss severity in the event of default. Internal credit ratings are expressed on a ratings scale similar to that used by the rating agencies and are generally reflective of an approach similar to that employed by the rating agencies, except that the Company's internal credit ratings focus on future performance rather than lifetime performance. The Company monitors its investment grade credits to determine whether any need to be internally downgraded to BIG and refreshes its internal credit ratings on individual credits in quarterly, semi-annual or annual cycles based on the Company’s view of the credit’s quality, loss potential, volatility and sector. Ratings on credits in sectors identified as under the most stress or with the most potential volatility are reviewed every quarter. The Company’s credit ratings on assumed credits are based on the Company’s reviews of low-rated credits or credits in volatile sectors, unless such information is not available, in which case, the ceding company’s credit rating of the transactions are used. Credits identified as BIG are subjected to further review to determine the probability of a loss. See Note 5, Expected Loss to be Paid, for additional information. Surveillance personnel then assign each BIG transaction to the appropriate BIG surveillance category based upon whether a future loss is expected and whether a claim has been paid. For surveillance purposes, the Company calculates present value using a constant discount rate of 4% or 5% depending on the insurance subsidiary. (Risk-free rates are used for calculating the expected loss for financial statement measurement purposes.) More extensive monitoring and intervention is employed for all BIG surveillance categories, with internal credit ratings reviewed quarterly. The Company expects “future losses” on a transaction when the Company believes there is at least a 50% chance that, on a present value basis, it will pay more claims in the future of that transaction than it will have reimbursed. The three BIG categories are: • BIG Category 1: Below-investment-grade transactions showing sufficient deterioration to make future losses possible, but for which none are currently expected. • BIG Category 2: Below-investment-grade transactions for which future losses are expected but for which no claims (other than liquidity claims, which are claims that the Company expects to be reimbursed within one year) have yet been paid. • BIG Category 3: Below-investment-grade transactions for which future losses are expected and on which claims (other than liquidity claims) have been paid. Components of Outstanding Exposure Unless otherwise noted, ratings disclosed herein on the Company's insured portfolio reflect its internal ratings. The Company classifies those portions of risks benefiting from reimbursement obligations collateralized by eligible assets held in trust in acceptable reimbursement structures as the higher of 'AA' or their current internal rating. The Company purchases securities that it has insured, and for which it has expected losses to be paid, in order to mitigate the economic effect of insured losses ("loss mitigation securities"). The Company excludes amounts attributable to loss mitigation securities (unless otherwise indicated) from par and debt service outstanding, because it manages such securities as investments and not insurance exposure. The following table presents the gross and net debt service for all financial guaranty contracts. Financial Guaranty Debt Service Outstanding Gross Debt Service Outstanding Net Debt Service Outstanding June 30, December 31, June 30, December 31, (in millions) Public finance $ 473,991 $ 515,494 $ 455,056 $ 494,426 Structured finance 34,814 43,976 33,306 41,915 Total financial guaranty $ 508,805 $ 559,470 $ 488,362 $ 536,341 In addition to the amounts shown in the table above, the Company’s net mortgage guaranty insurance debt service was approximately $104 million as of June 30, 2016 and $102 million as of December 31, 2015 , related to loans originated in Ireland. The increase in the net mortgage guaranty insurance debt service is due to exchange rate fluctuations. Financial Guaranty Portfolio by Internal Rating As of June 30, 2016 Public Finance U.S. Public Finance Non-U.S. Structured Finance U.S Structured Finance Non-U.S Total Rating Category Net Par Outstanding % Net Par Outstanding % Net Par Outstanding % Net Par Outstanding % Net Par Outstanding % (dollars in millions) AAA $ 2,376 0.9 % $ 695 2.5 % $ 11,362 44.4 % $ 1,628 40.1 % $ 16,061 4.9 % AA 59,310 21.8 1,775 6.3 6,719 26.3 149 3.7 67,953 20.6 A 142,028 52.2 6,440 22.9 2,008 7.9 457 11.2 150,933 45.7 BBB 60,132 22.1 17,840 63.4 920 3.6 1,235 30.4 80,127 24.3 BIG 8,268 3.0 1,378 4.9 4,553 17.8 591 14.6 14,790 4.5 Total net par outstanding (1) $ 272,114 100.0 % $ 28,128 100.0 % $ 25,562 100.0 % $ 4,060 100.0 % $ 329,864 100.0 % _____________________ (1) Excludes $1.4 billion of loss mitigation securities insured and held by the Company as of June 30, 2016 , which are primarily BIG. Financial Guaranty Portfolio by Internal Rating As of December 31, 2015 Public Finance U.S. Public Finance Non-U.S. Structured Finance U.S Structured Finance Non-U.S Total Rating Category Net Par Outstanding % Net Par Outstanding % Net Par Outstanding % Net Par Outstanding % Net Par Outstanding % (dollars in millions) AAA $ 3,053 1.1 % $ 709 2.4 % $ 14,366 45.2 % $ 2,709 50.6 % $ 20,837 5.8 % AA 69,274 23.7 2,017 6.8 7,934 25.0 177 3.3 79,402 22.1 A 157,440 53.9 6,765 22.9 2,486 7.8 555 10.3 167,246 46.7 BBB 54,315 18.6 18,708 63.2 1,515 4.8 1,365 25.5 75,903 21.2 BIG 7,784 2.7 1,378 4.7 5,469 17.2 552 10.3 15,183 4.2 Total net par outstanding (1) $ 291,866 100.0 % $ 29,577 100.0 % $ 31,770 100.0 % $ 5,358 100.0 % $ 358,571 100.0 % _____________________ (1) Excludes $1.5 billion of loss mitigation securities insured and held by the Company as of December 31, 2015 , which are primarily BIG. In addition to amounts shown in the tables above, the Company had outstanding commitments to provide guaranties of $117 million for public finance obligations as of June 30, 2016 . The expiration dates for the public finance commitments range between July 1, 2016 and February 25, 2017 , with $53 million expiring prior to the date of this filing. The commitments are contingent on the satisfaction of all conditions set forth in them and may expire unused or be canceled at the counterparty’s request. Therefore, the total commitment amount does not necessarily reflect actual future guaranteed amounts. Components of BIG Portfolio Components of BIG Net Par Outstanding (Insurance and Credit Derivative Form) As of June 30, 2016 BIG Net Par Outstanding Net Par BIG 1 BIG 2 BIG 3 Total BIG Outstanding (in millions) U.S. public finance (1) $ 4,902 $ 3,191 $ 175 $ 8,268 $ 272,114 Non-U.S. public finance 863 515 — 1,378 28,128 Structured finance: First lien U.S. residential mortgage-backed securities ("RMBS"): Prime first lien 21 83 20 124 237 Alt-A first lien 120 42 459 621 1,090 Option ARM 27 6 63 96 186 Subprime 128 210 882 1,220 3,193 Second lien U.S. RMBS 22 73 1,271 1,366 1,376 Total U.S. RMBS 318 414 2,695 3,427 6,082 Triple-X life insurance transactions — — 216 216 2,189 Trust preferred securities (“TruPS”) 436 127 — 563 3,255 Student loans — 68 42 110 1,645 Other structured finance 537 254 37 828 16,451 Total $ 7,056 $ 4,569 $ 3,165 $ 14,790 $ 329,864 Components of BIG Net Par Outstanding (Insurance and Credit Derivative Form) As of December 31, 2015 BIG Net Par Outstanding Net Par BIG 1 BIG 2 BIG 3 Total BIG Outstanding (in millions) U.S. public finance $ 4,765 $ 2,883 $ 136 $ 7,784 $ 291,866 Non-U.S. public finance 875 503 — 1,378 29,577 Structured finance: First lien U.S. RMBS: Prime first lien 225 34 25 284 445 Alt-A first lien 119 73 601 793 1,353 Option ARM 39 12 90 141 252 Subprime 146 228 930 1,304 3,457 Second lien U.S. RMBS 491 50 910 1,451 1,560 Total U.S. RMBS 1,020 397 2,556 3,973 7,067 Triple-X life insurance transactions — — 216 216 2,750 TruPS 679 127 — 806 4,379 Student loans 12 68 83 163 1,818 Other structured finance 672 151 40 863 21,114 Total $ 8,023 $ 4,129 $ 3,031 $ 15,183 $ 358,571 _____________________ (1) Subsequent to June 30, 2016, and as a result of its July 1, 2016 Puerto Rico claim payments, the Company downgraded from BIG 1 to BIG 3 $1,803 million net par outstanding of financial guaranty insurance across two risks. . BIG Net Par Outstanding and Number of Risks As of June 30, 2016 Net Par Outstanding Number of Risks(2) Description Financial Guaranty Insurance(1) Credit Derivative Total Financial Guaranty Insurance(1) Credit Derivative Total (dollars in millions) BIG: Category 1 (3) $ 6,546 $ 510 $ 7,056 198 10 208 Category 2 4,119 450 4,569 76 5 81 Category 3 (3) 3,039 126 3,165 131 12 143 Total BIG $ 13,704 $ 1,086 $ 14,790 405 27 432 BIG Net Par Outstanding and Number of Risks As of December 31, 2015 Net Par Outstanding Number of Risks(2) Description Financial Guaranty Insurance(1) Credit Derivative Total Financial Guaranty Insurance(1) Credit Derivative Total (dollars in millions) BIG: Category 1 $ 7,019 $ 1,004 $ 8,023 202 12 214 Category 2 3,655 474 4,129 85 8 93 Category 3 2,900 131 3,031 132 12 144 Total BIG $ 13,574 $ 1,609 $ 15,183 419 32 451 _____________________ (1) Includes net par outstanding for VIEs. (2) A risk represents the aggregate of the financial guaranty policies that share the same revenue source for purposes of making debt service payments. (3) Subsequent to June 30, 2016, and as a result of its July 1, 2016 Puerto Rico claim payments, the Company downgraded from BIG 1 to BIG 3 $1,803 million net par outstanding of financial guaranty insurance across two risks. Exposure to Puerto Rico The Company has insured exposure to general obligation bonds of the Commonwealth of Puerto Rico (“Puerto Rico” or the “Commonwealth”) and various obligations of its related authorities and public corporations aggregating $5.1 billion net par as of June 30, 2016 , all of which are rated BIG. Puerto Rico has experienced significant general fund budget deficits in recent years. In addition to high debt levels, Puerto Rico faces a challenging economic environment; the economy has declined nearly every year since 2007, while the population has shrunk every year since 2006 as residents have emigrated. On June 28, 2015, Governor García Padilla of Puerto Rico (the "Governor") publicly stated that the Commonwealth’s public debt, considering the current level of economic activity, was unpayable and that a comprehensive debt restructuring might be necessary. On November 30, 2015 and December 8, 2015, the Governor issued executive orders (“Clawback Orders”) directing the Puerto Rico Department of Treasury and the Puerto Rico Tourism Company to retain or transfer certain taxes pledged to secure the payment of bonds issued by the Puerto Rico Highways and Transportation Authority ("PRHTA"), Puerto Rico Infrastructure Financing Authority ("PRIFA"), and Puerto Rico Convention Center District Authority ("PRCCDA"). On January 7, 2016, the Company sued various Puerto Rico governmental officials in the United States District Court, District of Puerto Rico, asserting that this attempt to “claw back” pledged taxes is unconstitutional, and demanding declaratory and injunctive relief. The Puerto Rico credits insured by the Company subject to the Clawback Orders are shown in the table “Puerto Rico Net Par Outstanding” below. On January 1, 2016, PRIFA defaulted on payment of a portion of the interest due on its bonds on that date, resulting in a claim on the Company for those PRIFA bonds the Company insures. There have been additional payment defaults on this and other Puerto Rico credits since then, including, on July 1, 2016, a default on the payment of the Commonwealth’s general obligation bonds. The Company has now paid claims on several Puerto Rico credits as shown in the table “Puerto Rico Net Par Outstanding” below. On April 6, 2016, the Governor signed into law the Puerto Rico Emergency Moratorium & Financial Rehabilitation Act (the “Moratorium Act”). The Moratorium Act purportedly empowers the Governor to declare, entity by entity, states of emergencies and moratoriums on debt service payments on obligations of the Commonwealth and its related authorities and public corporations, as well as instituting a stay against related litigation, among other things. The Governor has used the authority of the Moratorium Act to take a number of actions related to issuers of obligations the Company insures. National Public Finance Guarantee Corp. (another financial guarantor), holders of the Commonwealth general obligation bonds and certain Puerto Rico residents have filed suits to invalidate the Moratorium Act, and on July 21, 2016, the Company filed a motion and form of complaint in the U.S. District Court for the District of Puerto Rico seeking relief from the stay of litigation imposed by the Puerto Rico Oversight, Management, and Economic Stability Act (“PROMESA”) to seek a declaration that the Moratorium Act is preempted by Federal bankruptcy law. On June 13, 2016, the Supreme Court of the United States affirmed rulings of lower courts finding that the Puerto Rico Public Corporation Debt Enforcement and Recovery Act, which was enacted by Puerto Rico in June 2014 in order to provide a legislative framework for certain public corporations experiencing severe financial stress to restructure their debt, was preempted by the U.S. Bankruptcy Code and therefore void. On June 30, 2016, PROMESA was signed into law by the President of the United States. PROMESA establishes a seven-member federal financial oversight board (“Oversight Board”) with authority to require that balanced budgets and fiscal plans be adopted and implemented by Puerto Rico. PROMESA provides a legal framework under which the debt of the Commonwealth and its related authorities and public corporations may be voluntarily restructured, and grants the Oversight Board the sole authority to file restructuring petitions in a federal court to restructure the debt of the Commonwealth and its related authorities and public corporations if voluntary negotiations fail, provided that any such restructuring must be in accordance with an Oversight Board approved fiscal plan that respects the liens and priorities provided under Puerto Rico law. PROMESA also appears to preempt at least portions of the Moratorium Act and appears to stay debt-related litigation, possibly including the Company’s litigation regarding the Clawback Orders. Members of the Oversight Board have yet to be named. The final shape, timing and validity of responses to Puerto Rico’s distress eventually enacted or implemented under the auspices of PROMESA and the Oversight Board or otherwise, and the impact of any such responses on obligations insured by the Company, is uncertain. The Company groups its Puerto Rico exposure into three categories: • Constitutionally Guaranteed. The Company includes in this category public debt benefiting from Article VI of the Constitution of the Commonwealth, which expressly provides that interest and principal payments on the public debt are to be paid before other disbursements are made. • Public Corporations – Certain Revenues Potentially Subject to Clawback. The Company includes in this category the debt of public corporations for which applicable law permits the Commonwealth to claw back, subject to certain conditions and for the payment of public debt, at least a portion of the revenues supporting the bonds the Company insures. As a Constitutional condition to clawback, available Commonwealth revenues for any fiscal year must be insufficient to pay Commonwealth debt service before the payment of any appropriations for that year. The Company believes that this condition has not been satisfied to date, and accordingly that the Commonwealth has not to date been entitled to clawback revenues supporting debt insured by the Company. As noted above, the Company sued various Puerto Rico governmental officials in the United States District Court, District of Puerto Rico asserting that Puerto Rico's recent attempt to “claw back” pledged taxes is unconstitutional, and demanding declaratory and injunctive relief. • Other Public Corporations. The Company includes in this category the debt of public corporations that are supported by revenues it does not believe are subject to clawback. Constitutionally Guaranteed General Obligation. As of June 30, 2016, the Company had $1,615 million insured net par outstanding of the general obligations of Puerto Rico, which are supported by the good faith, credit and taxing power of the Commonwealth. On July 1, 2016, despite the requirements of Article VI of its Constitution but pursuant to an executive order issued by the Governor under the Moratorium Act, the Commonwealth defaulted on most of the debt service payment due that day, and the Company made its first claim payments on these bonds. Puerto Rico Public Buildings Authority (“PBA”). As of June 30, 2016, the Company had $188 million insured net par outstanding of PBA bonds, which are supported by a pledge of the rents due under leases of government facilities to departments, agencies, instrumentalities and municipalities of the Commonwealth, and that benefit from a Commonwealth guaranty supported by a pledge of the Commonwealth’s good faith, credit and taxing power. On July 1, 2016, despite the requirements of Article VI of its Constitution but pursuant to an executive order issued by the Governor under the Moratorium Act, the PBA defaulted on most of the debt service payment due that day, and the Company made its first claim payments on these bonds. Public Corporations - Certain Revenues Potentially Subject to Clawback PRHTA. As of June 30, 2016 , the Company had $910 million insured net par outstanding of PRHTA (Transportation revenue) bonds and $369 million insured net par of PRHTA (Highways revenue) bonds. The transportation revenue bonds are secured by a subordinate gross pledge of gasoline and gas oil and diesel oil taxes, motor vehicle license fees and certain tolls, plus a first lien on up to $120 million annually of taxes on crude oil, unfinished oil and derivative products. The highways revenue bonds are secured by a gross pledge of gasoline and gas oil and diesel oil taxes, motor vehicle license fees and certain tolls. The Clawback Orders cover Commonwealth-derived taxes that are allocated to PRHTA. The Company believes that such sources represented a substantial majority of PRHTA’s revenues in 2015. The PRHTA bonds are subject to executive orders issued pursuant to the Moratorium Act. As noted above, the Company filed a motion and form of complaint in the U.S. District Court for the District of Puerto Rico seeking relief from the PROMESA stay to seek a declaration that the Moratorium Act is preempted by Federal bankruptcy law and that certain gubernatorial executive orders diverting PRHTA pledged toll revenues (which are not subject to the Clawback Orders) are preempted by PROMESA and violate the U.S. Constitution, and also seeking damages and injunctive relief. There were sufficient funds in the PRHTA bond accounts to make the July 1, 2016, PRHTA debt service payments guaranteed by the Company, and those payments were made in full. PRCCDA. As of June 30, 2016 , the Company had $164 million insured net par outstanding of PRCCDA bonds, which are secured by certain hotel tax revenues. These revenues are sensitive to the level of economic activity in the area and are subject to the Clawback Orders, and the bonds are subject to an executive order issued pursuant to the Moratorium Act. There were sufficient funds in the PRCCDA bond accounts to make the July 1, 2016 PRCCDA bond payments guaranteed by the Company, and those payments were made in full. PRIFA. As of June 30, 2016, the Company had $18 million insured net par outstanding of PRIFA bonds, which are secured primarily by the return to Puerto Rico of federal excise taxes paid on rum. These revenues are subject to the Clawback Orders and the bonds are subject to an executive order issued pursuant to the Moratorium Act. The Company made its first claim payment on PRIFA bonds in January 2016, and has continued to make claim payments on PRIFA bonds. Other Public Corporations Puerto Rico Electric Power Authority ("PREPA"). As of June 30, 2016 , the Company had $744 million insured net par outstanding of PREPA obligations, which are payable from a pledge of net revenues of the electric system. On December 24, 2015, AGM and AGC entered into a Restructuring Support Agreement (“RSA”) with PREPA, an ad hoc group of uninsured bondholders and a group of fuel-line lenders that would, subject to certain conditions, result in, among other things, modernization of the utility and a restructuring of current debt. Upon finalization of the contemplated restructuring transaction, insured PREPA revenue bonds (with no reduction to par or stated interest rate or extension of maturity) will be supported by securitization bonds issued by a special purpose corporation and secured by a transition charge assessed on ratepayers. To facilitate the securitization transaction and in exchange for a market premium, Assured Guaranty will issue surety insurance policies in an aggregate amount not expected to exceed $113 million ( $14 million for AGC and $99 million for AGM) to support a portion of the reserve fund for the securitization bonds. Certain of the creditors also agreed, subject to certain conditions, to participate in a bridge financing, which was closed in two tranches on May 19, 2016 and June 22, 2016. AGM's and AGC's share of the bridge financing was approximately $15 million ( $2 million for AGC and $13 million for AGM). Legislation meeting the requirements of the RSA was enacted on February 16, 2016, and a transition charge to be paid by PREPA rate payers for debt service on the securitization bonds as contemplated by the RSA was approved by the Puerto Rico Energy Commission on June 20, 2016. The closing of the restructuring transaction and the issuance of the surety bonds are subject to certain conditions, including execution of acceptable documentation and legal opinions. On July 1, 2016, PREPA made full payment of the $41 million of principal and interest due on PREPA revenue bonds insured by AGM and AGC. That payment was funded in part by AGM’s purchase of $26 million of PREPA bonds maturing in 2020. Upon finalization of the RSA, these new PREPA revenue bonds will be supported by securitization bonds contemplated by the RSA. In early 2016, PREPA repaid in full the $74 million in aggregate principal amount of PREPA revenue bonds purchased by AGM and AGC in July 2015 to replenish some of the operating funds PREPA used to make the July 2015 payments on the PREPA revenue bonds insured by AGM and AGC. There can be no assurance that the conditions in the RSA will be met or that, if the conditions are met, the RSA's other provisions, including those related to the insured PREPA revenue bonds, will be implemented. In addition, the impact of PROMESA and the Moratorium Act or any attempt to exercise the power purportedly granted by the Moratorium Act on the implementation of the RSA is uncertain. PREPA, during the pendency of the agreements, has suspended deposits into its debt service fund. Puerto Rico Aqueduct and Sewer Authority (“PRASA”). As of June 30, 2016 , the Company had $388 million of insured net par outstanding to PRASA bonds, which are secured by the gross revenues of the water and sewer system. On September 15, 2015, PRASA entered into a settlement with the U.S.Department of Justice and the U.S. Environmental Protection Agency that requires it to spend $1.6 billion to upgrade and improve its sewer system island-wide. According to a material event notice PRASA filed on March 4, 2016, PRASA owed its contractors $140 million . The PRASA Revitalization Act, which establishes a securitization mechanism that could facilitate debt issuance, was signed into law on July 13, 2016. While certain bonds benefiting from a guarantee by the Commonwealth are subject to an executive order issued under the Moratorium Act, bonds insured by the Company are not subject to that order. There were sufficient funds in the PRASA bond accounts to make the July 1, 2016, PRASA bond payments guaranteed by the Company, and those payments were made in full. Municipal Finance Agency ("MFA"). As of June 30, 2016 , the Company had $387 million net par outstanding of bonds issued by MFA secured by a pledge of local property tax revenues. There were sufficient funds in the MFA bond accounts to make the July 1, 2016 MFA bond payments guaranteed by the Company, and those payments were made in full. Puerto Rico Sales Tax Financing Corporation (“COFINA”). As of June 30, 2016 , the Company had $270 million insured net par outstanding of junior COFINA bonds, which are secured primarily by a second lien on certain sales and use taxes. There were no debt service payments due on July 1, 2016 on Company-insured COFINA bonds, and, as of the date of this filing, all payments on Company-insured COFINA bonds had been made. University of Puerto Rico (“U of PR”). As of June 30, 2016, the Company had $1 million insured net par outstanding of U of PR bonds, which are general obligations of the university and are secured by a subordinate lien on the proceeds, profits and other income of the University, subject to a senior pledge and lien for the benefit of outstanding university system revenue bonds. The U of PR bonds are subject to an executive order issued under the Moratorium Act. There were no debt service payments due on July 1, 2016 on Company-insured U of PR bonds, and, as of the date of this filing, all payments on Company-insured U of PR bonds had been made. All Puerto Rico exposures are internally rated triple-C or below. The following tables show the Company’s insured exposure to general obligation bonds of Puerto Rico and various obligations of its related authorities and public corporations. Puerto Rico Gross Par and Gross Debt Service Outstanding Gross Par Outstanding Gross Debt Service Outstanding June 30, December 31, June 30, December 31, (in millions) Exposure to Puerto Rico $ 5,756 $ 5,755 $ 9,483 $ 9,632 Puerto Rico Net Par Outstanding As of As of (in millions) Commonwealth Constitutionally Guaranteed Commonwealth of Puerto Rico - General Obligation Bonds (1) $ 1,615 $ 1,615 Puerto Rico Public Buildings Authority (1) 188 188 Public Corporations - Certain Revenues Potentially Subject to Clawback PRHTA (Transportation revenue) 910 909 PRHTA (Highways revenue) 369 370 PRCCDA 164 164 PRIFA (1) 18 18 Other Public Corporations PREPA 744 744 PRASA 388 388 MFA 387 387 COFINA 270 269 U of PR 1 1 Total net exposure to Puerto Rico $ 5,054 $ 5,053 ____________________ (1) As of the date of this filing, the Company has paid claims on these credits. The following table shows the scheduled amortization of the insured general obligation bonds of Puerto Rico and various obligations of its related authorities and public corporations. The Company guarantees payments of interest and principal when those amounts are scheduled to be paid and cannot be required to pay on an accelerated basis. In the event that obligors default on their obligations, the Company would only be required to pay the shortfall between the principal and interest due in any given period and the amount paid by the obligors. Amortization Schedule of Puerto Rico Net Par Outstanding and Net Debt Service Outstanding As of June 30, 2016 Scheduled Net Par Amortization Scheduled Net Debt Service Amortization (in millions) 2016 (July 1 – September 30) $ 302 $ 428 2016 (October 1 – December 31) 0 2 2017 222 463 2018 179 410 2019 204 424 2020 270 482 2021 125 323 2022 115 305 2023 150 338 2024 174 352 2025 196 366 2026-2030 943 1,633 2031-2035 1,131 1,599 2036-2040 579 780 2041-2045 296 380 2046-2047 168 181 Total $ 5,054 $ 8,466 Exposure to Selected European Countries The European countries where the Company has exposure and believes heightened uncertainties exist are: Hungary, Italy, Portugal, Spain and Turkey (collectively, the “Selected European Countries”). The Company added Turkey to its list of Selected European Countries as of June 30, 2016, as a result of the recent political turmoil in the country. The Company’s direct economic exposure to the Selected European Countries (based on par for financial guaranty contracts and notional amount for financial guaranty contracts accounted for as derivatives) is shown in the following table, net of ceded reinsurance. Net Direct Economic Exposure to Selected European Countries(1) As of June 30, 2016 Hungary Italy Portugal Spain Turkey Total (in millions) Sub-sovereign exposure(2) $ 265 $ 793 $ 80 $ 366 $ — $ 1,504 Non-sovereign exposure(3) 174 432 — — 204 810 Total $ 439 $ 1,225 $ 80 $ 366 $ 204 $ 2,314 Total BIG (See Note 5) $ 369 $ — $ 80 $ 366 $ — $ 815 ____________________ (1) While the Company’s exposures are shown in U.S. dollars, the obligations the Company insures are in various currencies, primarily Euros. (2) Sub-sovereign exposure in Selected European Countries includes transactions backed by receivables from or supported by sub-sovereigns, which are governmental or government-backed entities other than the ultimate governing body of the country. (3) Non-sovereign exposure in Selected European Countries includes debt of regulated utilities, RMBS and diversified payment rights ("DPR") securitizations. The Company has excluded from the exposure tables above its indirect economic exposure to the Selected European Countries through policies it provides on pooled corporate and commercial receivables transactions. The Company calculates indirect exposure to a country by multiplying the par amount of a transaction insured by the Company times the percent of the relevant collateral pool reported as having a nexus to the country. On that basis, the Comp

Expected Loss to be Paid

Expected Loss to be Paid	6 Months Ended
	Jun. 30, 2016
Expected Losses [Abstract]
Expected Loss to be Paid	Expected Loss to be Paid Loss Estimation Process This note provides information regarding expected claim payments to be made under all contracts in the insured portfolio, regardless of the accounting model. The Company’s loss reserve committees estimate expected loss to be paid for all contracts by reviewing analyses that consider various scenarios with corresponding probabilities assigned to them. Depending upon the nature of the risk, the Company’s view of the potential size of any loss and the information available to the Company, that analysis may be based upon individually developed cash flow models, internal credit rating assessments and sector-driven loss severity assumptions or judgmental assessments. The financial guaranties issued by the Company insure the credit performance of the guaranteed obligations over an extended period of time, in some cases over 30 years, and in most circumstances, the Company has no right to cancel such financial guaranties. The determination of expected loss to be paid is an inherently subjective process involving numerous estimates, assumptions and judgments by management, using both internal and external data sources with regard to frequency, severity of loss, economic projections, governmental actions, negotiations and other factors that affect credit performance. These estimates, assumptions and judgments, and the factors on which they are based, may change materially over a quarter, and as a result the Company’s loss estimates may change materially over that same period. The Company does not use traditional actuarial approaches to determine its estimates of expected losses. Actual losses will ultimately depend on future events or transaction performance and may be influenced by many interrelated factors that are difficult to predict. As a result, the Company's current projections of probable and estimable losses may be subject to considerable volatility and may not reflect the Company's ultimate claims paid. For information on the Company's loss estimation process, please refer to Note 5, Expected Losses to be Paid, of Part II, Item 8, Financial Statements and Supplementary Data in AGL's Annual Report on Form 10-K for the year ended December 31, 2015. The following tables present a roll forward of the present value of net expected loss to be paid for all contracts, whether accounted for as insurance, credit derivatives or financial guaranty ("FG") VIEs, by sector, after the benefit for expected recoveries for breaches of representations and warranties ("R&W") and other expected recoveries. The Company used weighted average risk-free rates for U.S. dollar denominated obligations that ranged from 0.0% to 2.46% as of June 30, 2016 and 0.0% to 3.25% as of December 31, 2015 . Net Expected Loss to be Paid After Net Expected Recoveries for Breaches of R&W Roll Forward Second Quarter Six Months 2016 2015 2016 2015 (in millions) Net expected loss to be paid, beginning of period $ 1,337 $ 1,154 $ 1,391 $ 1,169 Net expected loss to be paid on Radian Asset portfolio as of April 1, 2015 — 190 — 190 Economic loss development due to: Accretion of discount 6 7 15 14 Changes in discount rates 45 (47 ) 108 (40 ) Changes in timing and assumptions (29 ) 232 (42 ) 215 Total economic loss development 22 192 81 189 Paid losses (33 ) (26 ) (146 ) (38 ) Net expected loss to be paid, end of period $ 1,326 $ 1,510 $ 1,326 $ 1,510 Net Expected Loss to be Paid After Net Expected Recoveries for Breaches of R&W Roll Forward by Sector Second Quarter 2016 Net Expected Loss to be Paid (Recovered) as of March 31, 2016 Economic Loss Development (Paid) Recovered Losses (1) Net Expected (Recovered) as of (in millions) Public Finance: U.S. public finance $ 864 $ 111 $ (12 ) $ 963 Non-U.S. public finance 39 (2 ) — 37 Public Finance 903 109 (12 ) 1,000 Structured Finance: U.S. RMBS: First lien: Prime first lien (1 ) 0 4 3 Alt-A first lien 36 (38 ) (94 ) (96 ) Option ARM (47 ) (10 ) 1 (56 ) Subprime 240 (26 ) 13 227 Total first lien 228 (74 ) (76 ) 78 Second lien 65 (7 ) 56 114 Total U.S. RMBS 293 (81 ) (20 ) 192 Triple-X life insurance transactions 102 (2 ) 0 100 Student loans 32 (1 ) 0 31 Other structured finance 7 (3 ) (1 ) 3 Structured Finance 434 (87 ) (21 ) 326 Total $ 1,337 $ 22 $ (33 ) $ 1,326 Net Expected Loss to be Paid After Net Expected Recoveries for Breaches of R&W Roll Forward by Sector Second Quarter 2015 Net Expected Loss to be Paid (Recovered) as of March 31, 2015 Net Expected Loss to be Paid (Recovered) on Radian Asset portfolio as of April 1, 2015 Economic Loss Development (Paid) Recovered Losses (1) Net Expected (Recovered) as of (in millions) Public Finance: U.S. public finance $ 310 $ 81 $ 226 $ (4 ) $ 613 Non-U.S public finance 42 4 (2 ) — 44 Public Finance 352 85 224 (4 ) 657 Structured Finance: U.S. RMBS: First lien: Prime first lien 3 — (1 ) (1 ) 1 Alt-A first lien 289 7 (16 ) (15 ) 265 Option ARM (16 ) 0 (3 ) 1 (18 ) Subprime 293 (4 ) (6 ) (10 ) 273 Total first lien 569 3 (26 ) (25 ) 521 Second lien 1 1 (6 ) 7 3 Total U.S. RMBS 570 4 (32 ) (18 ) 524 Triple-X life insurance transactions 165 — 2 (2 ) 165 Student loans 62 — 1 (5 ) 58 Other structured finance 5 101 (3 ) 3 106 Structured Finance 802 105 (32 ) (22 ) 853 Total $ 1,154 $ 190 $ 192 $ (26 ) $ 1,510 Net Expected Loss to be Paid After Net Expected Recoveries for Breaches of R&W Roll Forward by Sector Six Months 2016 Net Expected Loss to be Paid (Recovered) as of December 31, 2015 (2) Economic Loss Development (Paid) Recovered Losses (1) Net Expected (Recovered) as of (in millions) Public Finance: U.S. public finance $ 771 $ 209 $ (17 ) $ 963 Non-U.S. public finance 38 (1 ) — 37 Public Finance 809 208 (17 ) 1,000 Structured Finance: U.S. RMBS: First lien: Prime first lien (2 ) 0 5 3 Alt-A first lien 127 (54 ) (169 ) (96 ) Option ARM (28 ) (31 ) 3 (56 ) Subprime 251 (25 ) 1 227 Total first lien 348 (110 ) (160 ) 78 Second lien 61 (2 ) 55 114 Total U.S. RMBS 409 (112 ) (105 ) 192 Triple-X life insurance transactions 99 2 (1 ) 100 Student loans 54 (15 ) (8 ) 31 Other structured finance 20 (2 ) (15 ) 3 Structured Finance 582 (127 ) (129 ) 326 Total $ 1,391 $ 81 $ (146 ) $ 1,326 Net Expected Loss to be Paid After Net Expected Recoveries for Breaches of R&W Roll Forward by Sector Six Months 2015 Net Expected Loss to be Paid (Recovered ) as of December 31, 2014 Net Expected Loss to be Paid (Recovered) on Radian Asset portfolio as of April 1, 2015 Economic Loss Development (Paid) Recovered Losses (1) Net Expected ) as of (in millions) Public Finance: U.S. public finance $ 303 $ 81 $ 235 $ (6 ) $ 613 Non-U.S. public finance 45 4 (5 ) — 44 Public Finance 348 85 230 (6 ) 657 Structured Finance: U.S. RMBS: First lien: Prime first lien 4 — (1 ) (2 ) 1 Alt-A first lien 304 7 (21 ) (25 ) 265 Option ARM (16 ) 0 1 (3 ) (18 ) Subprime 303 (4 ) (7 ) (19 ) 273 Total first lien 595 3 (28 ) (49 ) 521 Second lien (11 ) 1 0 13 3 Total U.S. RMBS 584 4 (28 ) (36 ) 524 Triple-X life insurance transactions 161 — 7 (3 ) 165 Student loans 68 — (5 ) (5 ) 58 Other structured finance 8 101 (15 ) 12 106 Structured Finance 821 105 (41 ) (32 ) 853 Total $ 1,169 $ 190 $ 189 $ (38 ) $ 1,510 ____________________ (1) Net of ceded paid losses, whether or not such amounts have been settled with reinsurers. Ceded paid losses are typically settled 45 days after the end of the reporting period. Such amounts are recorded in reinsurance recoverable on paid losses included in other assets. The Company paid $7 million and $5 million in loss adjustment expenses (" LAE") for Second Quarter 2016 and 2015 , respectively, and $9 million and $9 million in LAE for Six Months 2016 and 2015 , respectively. (2) Includes expected LAE to be paid of $8 million as of June 30, 2016 and $12 million as of December 31, 2015 . Future Net R&W Recoverable (Payable)(1) As of As of (in millions) U.S. RMBS: First lien $ (90 ) $ 0 Second lien 32 79 Total $ (58 ) $ 79 ____________________ (1) The Company’s agreements with R&W providers generally provide that, as the Company makes claim payments, the R&W providers reimburse it for those claims; if the Company later receives reimbursement through the transaction (for example, from excess spread), the Company repays the R&W providers. See the section “Breaches of Representations and Warranties” for information about the R&W agreements and eligible assets held in trust with respect to such agreements. When the Company projects receiving more reimbursements in the future than it projects paying in claims on transactions covered by R&W settlement agreements, the Company will have a net R&W payable. The following tables present the present value of net expected loss to be paid for all contracts by accounting model, by sector and after the benefit for expected recoveries for breaches of R&W. Net Expected Loss to be Paid (Recovered) By Accounting Model As of June 30, 2016 Financial Guaranty Insurance FG VIEs(1) and Other Credit Derivatives(2) Total (in millions) Public Finance: U.S. public finance $ 963 $ — $ 0 $ 963 Non-U.S. public finance 37 — — 37 Public Finance 1,000 — 0 1,000 Structured Finance: U.S. RMBS: First lien: Prime first lien 3 — — 3 Alt-A first lien (115 ) 20 (1 ) (96 ) Option ARM (51 ) — (5 ) (56 ) Subprime 145 50 32 227 Total first lien (18 ) 70 26 78 Second lien 68 43 3 114 Total U.S. RMBS 50 113 29 192 Triple-X life insurance transactions 89 — 11 100 Student loans 31 — — 31 Other structured finance 38 1 (36 ) 3 Structured Finance 208 114 4 326 Total $ 1,208 $ 114 $ 4 $ 1,326 Net Expected Loss to be Paid (Recovered) By Accounting Model As of December 31, 2015 Financial Guaranty Insurance FG VIEs(1) and Other Credit Derivatives(2) Total (in millions) Public Finance: U.S. public finance $ 771 $ — $ 0 $ 771 Non-U.S. public finance 38 — — 38 Public Finance 809 — 0 809 Structured Finance: U.S. RMBS: First lien: Prime first lien 2 — (4 ) (2 ) Alt-A first lien 110 17 0 127 Option ARM (27 ) — (1 ) (28 ) Subprime 153 59 39 251 Total first lien 238 76 34 348 Second lien 13 44 4 61 Total U.S. RMBS 251 120 38 409 Triple-X life insurance transactions 88 — 11 99 Student loans 54 — — 54 Other structured finance 37 16 (33 ) 20 Structured Finance 430 136 16 582 Total $ 1,239 $ 136 $ 16 $ 1,391 ___________________ (1) Refer to Note 9, Consolidated Variable Interest Entities. (2) Refer to Note 8, Financial Guaranty Contracts Accounted for as Credit Derivatives. The following tables present the net economic loss development for all contracts by accounting model, by sector and after the benefit for expected recoveries for breaches of R&W. Net Economic Loss Development (Benefit) By Accounting Model Second Quarter 2016 Financial Guaranty Insurance FG VIEs(1) and Other Credit Derivatives(2) Total (in millions) Public Finance: U.S. public finance $ 111 $ — $ — $ 111 Non-U.S. public finance (2 ) — — (2 ) Public Finance 109 — — 109 Structured Finance: U.S. RMBS: First lien: Prime first lien 0 — 0 0 Alt-A first lien (39 ) 2 (1 ) (38 ) Option ARM (9 ) — (1 ) (10 ) Subprime (17 ) (2 ) (7 ) (26 ) Total first lien (65 ) 0 (9 ) (74 ) Second lien (1 ) (6 ) 0 (7 ) Total U.S. RMBS (66 ) (6 ) (9 ) (81 ) Triple-X life insurance transactions (1 ) — (1 ) (2 ) Student loans (1 ) — — (1 ) Other structured finance (1 ) (1 ) (1 ) (3 ) Structured Finance (69 ) (7 ) (11 ) (87 ) Total $ 40 $ (7 ) $ (11 ) $ 22 Net Economic Loss Development (Benefit) By Accounting Model Second Quarter 2015 Financial Guaranty Insurance FG VIEs(1) and Other Credit Derivatives(2) Total (in millions) Public Finance: U.S. public finance $ 232 $ — $ (6 ) $ 226 Non-U.S. public finance (2 ) — — (2 ) Public Finance 230 — (6 ) 224 Structured Finance: U.S. RMBS: First lien: Prime first lien (1 ) — — (1 ) Alt-A first lien (12 ) (1 ) (3 ) (16 ) Option ARM (4 ) — 1 (3 ) Subprime — (1 ) (5 ) (6 ) Total first lien (17 ) (2 ) (7 ) (26 ) Second lien (7 ) — 1 (6 ) Total U.S. RMBS (24 ) (2 ) (6 ) (32 ) Triple-X life insurance transactions 1 — 1 2 Student loans 1 — — 1 Other structured finance (1 ) 1 (3 ) (3 ) Structured Finance (23 ) (1 ) (8 ) (32 ) Total $ 207 $ (1 ) $ (14 ) $ 192 Net Economic Loss Development (Benefit) By Accounting Model Six Months 2016 Financial Guaranty Insurance FG VIEs(1) and Other Credit Derivatives(2) Total (in millions) Public Finance: U.S. public finance $ 209 $ — $ — $ 209 Non-U.S. public finance (1 ) — — (1 ) Public Finance 208 — — 208 Structured Finance: U.S. RMBS: First lien: Prime first lien 0 — 0 0 Alt-A first lien (56 ) 3 (1 ) (54 ) Option ARM (28 ) — (3 ) (31 ) Subprime (14 ) (2 ) (9 ) (25 ) Total first lien (98 ) 1 (13 ) (110 ) Second lien 1 (3 ) 0 (2 ) Total U.S. RMBS (97 ) (2 ) (13 ) (112 ) Triple-X life insurance transactions 2 — 0 2 Student loans (15 ) — — (15 ) Other structured finance 3 (1 ) (4 ) (2 ) Structured Finance (107 ) (3 ) (17 ) (127 ) Total $ 101 $ (3 ) $ (17 ) $ 81 Net Economic Loss Development (Benefit) By Accounting Model Six Months 2015 Financial Guaranty Insurance FG VIEs(1) and Other Credit Derivatives(2) Total (in millions) Public Finance: U.S. public finance $ 241 $ — $ (6 ) $ 235 Non-U.S. public finance (5 ) — — (5 ) Public Finance 236 — (6 ) 230 Structured Finance: U.S. RMBS: First lien: Prime first lien 0 — (1 ) (1 ) Alt-A first lien (10 ) (1 ) (10 ) (21 ) Option ARM (3 ) — 4 1 Subprime (4 ) 3 (6 ) (7 ) Total first lien (17 ) 2 (13 ) (28 ) Second lien 1 (1 ) — — Total U.S. RMBS (16 ) 1 (13 ) (28 ) Triple-X life insurance transactions 5 — 2 7 Student loans (5 ) — — (5 ) Other structured finance (1 ) — (14 ) (15 ) Structured Finance (17 ) 1 (25 ) (41 ) Total $ 219 $ 1 $ (31 ) $ 189 _________________ (1) Refer to Note 9, Consolidated Variable Interest Entities. (2) Refer to Note 8, Financial Guaranty Contracts Accounted for as Credit Derivatives. Selected U.S. Public Finance Transactions The Company insures general obligation bonds of the Commonwealth of Puerto Rico and various obligations of its related authorities and public corporations aggregating $5.1 billion net par as of June 30, 2016 , all of which are BIG. For additional information regarding the Company's exposure to general obligations of Commonwealth of Puerto Rico and various obligations of its related authorities and public corporations, please refer to "Exposure to Puerto Rico" in Note 4, Outstanding Exposure. On February 25, 2015, a plan of adjustment resolving the bankruptcy filing of the City of Stockton, California under chapter 9 of the U.S. Bankruptcy Code became effective. As of June 30, 2016 , the Company’s net par subject to the plan consists of $115 million of pension obligation bonds. As part of the plan settlement, the City will repay the pension obligation bonds from certain fixed payments and certain variable payments contingent on the City's revenue growth. The Company has approximately $20 million of net par exposure as of June 30, 2016 to bonds issued by Parkway East Public Improvement District, which is located in Madison County, Mississippi. The bonds, which are rated BIG, are payable from special assessments on properties within the District, as well as amounts paid under a contribution agreement with the County in which the County covenants that it will provide funds in the event special assessments are not sufficient to make a debt service payment. The special assessments have not been sufficient to pay debt service in full. In earlier years, the County provided funding to cover the balance of the debt service requirement, but the County now claims that the District’s failure to reimburse it within the two years stipulated in the contribution agreement means that the County is not required to provide funding until it is reimbursed. On April 27, 2016, the court granted the Company's motion for summary judgment in a declaratory judgment action, agreeing with the Company's interpretation of the County's obligations under the contribution agreement. See "Recovery Litigation" below. The Company also has $13.6 billion of net par exposure to healthcare transactions. The BIG net par outstanding in this sector is $303 million . The Company projects that its total net expected loss across its troubled U.S. public finance credits as of June 30, 2016 , which incorporated the likelihood of the various outcomes, will be $963 million , compared with a net expected loss of $771 million as of December 31, 2015. Economic loss development in Second Quarter 2016 and Six Months 2016 was $111 million and $209 million , respectively, which was primarily attributable to Puerto Rico exposures. Certain Selected European Country Sub-Sovereign Transactions The Company insures and reinsures credits with sub-sovereign exposure to various Spanish and Portuguese issuers where a Spanish and Portuguese sovereign default may cause the sub-sovereigns also to default. The Company's exposure net of reinsurance to these Spanish and Portuguese credits is $366 million and $80 million , respectively. The Company rates most of these issuers in the BB category due to the financial condition of Spain and Portugal and their dependence on the sovereign. The Company's Hungary exposure is to infrastructure bonds dependent on payments from Hungarian governmental entities. The Company's exposure net of reinsurance to these Hungarian credits is $265 million , all of which is rated BIG. The Company estimated net expected losses of $34 million related to these Spanish, Portuguese and Hungarian credits. The economic benefit of approximately $2 million during Second Quarter 2016 and approximately $1 million during Six Months 2016 was primarily related to changes in the exchange rate between the Euro and U.S. Dollar. Approach to Projecting Losses in U.S. RMBS The Company projects losses on its insured U.S. RMBS on a transaction-by-transaction basis by projecting the performance of the underlying pool of mortgages over time and then applying the structural features (i.e., payment priorities and tranching) of the RMBS and any R&W agreements to the projected performance of the collateral over time. The resulting projected claim payments or reimbursements are then discounted using risk-free rates. Second Quarter 2016 U.S. RMBS Loss Projections Based on its observation during the period of the performance of its insured transactions (including early stage delinquencies, late stage delinquencies and loss severity) as well as the residential property market and economy in general, the Company chose to use the same general assumptions to project RMBS losses as of June 30, 2016 as it used as of December 31, 2015 , but increased severities for specific vintages of Alt-A first lien and Option ARM transactions, decreased liquidation rates for certain vintages of subprime and increased liquidation rates for second lien transactions based on observed data. U.S. First Lien RMBS Loss Projections: Alt-A First Lien, Option ARM, Subprime and Prime The majority of projected losses in first lien RMBS transactions are expected to come from non-performing mortgage loans (those that are or in the past twelve months have been two or more payments behind, have been modified, are in foreclosure, or have been foreclosed upon). Changes in the amount of non-performing loans from the amount projected in the previous period are one of the primary drivers of loss development in this portfolio. In order to determine the number of defaults resulting from these delinquent and foreclosed loans, the Company applies a liquidation rate assumption to loans in each of various non-performing categories. The Company arrived at its liquidation rates based on data purchased from a third party provider and assumptions about how delays in the foreclosure process and loan modifications may ultimately affect the rate at which loans are liquidated. Each quarter the Company reviews the most recent twelve months of this data and (if necessary) adjusts its liquidation rates based on its observations. The following table shows liquidation assumptions for various non-performing categories. First Lien Liquidation Rates June 30, 2016 March 31, 2016 December 31, 2015 Current Loans Modified in the Previous 12 Months Alt A and Prime 25% 25% 25% Option ARM 25 25 25 Subprime 25 25 25 Current Loans Delinquent in the Previous 12 Months Alt A and Prime 25 25 25 Option ARM 25 25 25 Subprime 25 25 25 30 – 59 Days Delinquent Alt A and Prime 35 35 35 Option ARM 40 40 40 Subprime 45 45 45 60 – 89 Days Delinquent Alt A and Prime 45 45 45 Option ARM 50 50 50 Subprime 50 55 55 90+ Days Delinquent Alt A and Prime 55 55 55 Option ARM 60 60 60 Subprime 55 60 60 Bankruptcy Alt A and Prime 45 45 45 Option ARM 50 50 50 Subprime 40 40 40 Foreclosure Alt A and Prime 65 65 65 Option ARM 70 70 70 Subprime 65 70 70 Real Estate Owned All 100 100 100 While the Company uses liquidation rates as described above to project defaults of non-performing loans (including current loans modified or delinquent within the last 12 months), it projects defaults on presently current loans by applying a conditional default rate (" CDR") trend. The start of that CDR trend is based on the defaults the Company projects will emerge from currently nonperforming, recently nonperforming and modified loans. The total amount of expected defaults from the non-performing loans is translated into a constant CDR ( i.e ., the CDR plateau), which, if applied for each of the next 36 months, would be sufficient to produce approximately the amount of defaults that were calculated to emerge from the various delinquency categories. The CDR thus calculated individually on the delinquent collateral pool for each RMBS is then used as the starting point for the CDR curve used to project defaults of the presently performing loans. In the base case, after the initial 36 -month CDR plateau period, each transaction’s CDR is projected to improve over 12 months to an intermediate CDR (calculated as 20% of its CDR plateau); that intermediate CDR is held constant for 36 months and then trails off in steps to a final CDR of 5% of the CDR plateau. In the base case, the Company assumes the final CDR will be reached 7 years after the initial 36 -month CDR plateau period. Under the Company’s methodology, defaults projected to occur in the first 36 months represent defaults that can be attributed to loans that were modified or delinquent in the last 12 months or that are currently delinquent or in foreclosure, while the defaults projected to occur using the projected CDR trend after the first 36 month period represent defaults attributable to borrowers that are currently performing or are projected to reperform. Another important driver of loss projections is loss severity, which is the amount of loss the transaction incurs on a loan after the application of net proceeds from the disposal of the underlying property. Loss severities experienced in first lien transactions have reached historically high levels, and the Company is assuming in the base case that these high levels generally will continue for another 18 months. The Company determines its initial loss severity based on actual recent experience. As a result, as of March 31, 2016, the Company updated severities for specific vintages of Alt-A first lien and subprime transactions based on observed data and as of June 30, 2016 the Company updated severities again for certain vintages of Alt-A, as well as Option ARM. The Company then assumes that loss severities begin returning to levels consistent with underwriting assumptions beginning after the initial 18 month period, declining to 40% in the base case over 2.5 years. The following table shows the range as well as the average, weighted by outstanding net insured par, for key assumptions used in the calculation of expected loss to be paid for individual transactions for direct vintage 2004 - 2008 first lien U.S. RMBS. Key Assumptions in Base Case Expected Loss Estimates First Lien RMBS(1) As of As of As of Range Weighted Average Range Weighted Average Range Weighted Average Alt-A First Lien Plateau CDR 0.9 % - 27.0% 6.1% 0.9 % - 27.8% 6.4% 1.7 % – 26.4% 6.4% Intermediate CDR 0.2 % - 5.4% 1.2% 0.2 % - 5.6% 1.3% 0.3 % – 5.3% 1.3% Period until intermediate CDR 48 months 48 months 48 months Final CDR 0.0 % - 1.3% 0.3% 0.0 % - 1.4% 0.3% 0.1 % – 1.3% 0.3% Initial loss severity: 2005 and prior 60.0% 60.0% 60.0% 2006 80.0% 80.0% 70.0% 2007 70.0% 65.0% 65.0% Initial conditional prepayment rate ("CPR") 3.5 % - 29.3% 11.0% 2.7 % - 31.6% 11.8% 2.7 % – 32.5% 11.5% Final CPR(2) 15% 15% 15% Option ARM Plateau CDR 3.2 % - 10.1% 7.4% 3.4 % - 10.6% 7.8% 3.5 % – 10.3% 7.8% Intermediate CDR 0.6 % - 2.0% 1.5% 0.7 % - 2.1% 1.6% 0.7 % – 2.1% 1.6% Period until intermediate CDR 48 months 48 months 48 months Final CDR 0.2 % - 0.5% 0.3% 0.2 % - 0.5% 0.4% 0.2 % – 0.5% 0.4% Initial loss severity: 2005 and prior 60.0% 60.0% 60.0% 2006 70.0% 70.0% 70.0% 2007 75.0% 65.0% 65.0% Initial CPR 2.0 % - 13.2% 5.7% 2.0 % - 13.7% 5.5% 1.5 % – 10.9% 5.1% Final CPR(2) 15% 15% 15% Subprime Plateau CDR 4.4 % - 12.7% 8.5% 4.2 % - 14.4% 9.4% 4.7 % – 13.2% 9.5% Intermediate CDR 0.9 % - 2.5% 1.7% 0.8 % - 2.9% 1.9% 0.9 % – 2.6% 1.9% Period until intermediate CDR 48 months 48 months 48 months Final CDR 0.2 % - 0.6% 0.4% 0.2 % - 0.7% 0.4% 0.2 % – 0.7% 0.4% Initial loss severity: 2005 and prior 80.0% 80.0% 75.0% 2006 90.0% 90.0% 90.0% 2007 90.0% 90.0% 90.0% Initial CPR 0.6 % - 11.3% 4.9% 0.3 % - 9.2% 4.2% 0.0 % – 10.1% 3.6% Final CPR(2) 15% 15% 15% ____________________ (1) Represents variables for most heavily weighted scenario (the “base case”). (2) For transactions where the initial CPR is higher than the final CPR, the initial CPR is held constant and the final CPR is not used. The rate at which the principal amount of loans is voluntarily prepaid may impact both the amount of losses projected (since that amount is a function of the CDR, the loss severity and the loan balance over time) as well as the amount of excess spread (the amount by which the interest paid by the borrowers on the underlying loan exceeds the amount of interest owed on the insured obligations). The assumption for the voluntary CPR follows a similar pattern to that of the CDR. The current level of voluntary prepayments is assumed to continue for the plateau period before gradually increasing over 12 months to the final CPR, which is assumed to be 15% in the base case. For transactions where the initial CPR is higher than the final CPR, the initial CPR is held constant and the final CPR is not used. These CPR assumptions are the same as those the Company used for March 31, 2016 and December 31, 2015 . In estimating expected losses, the Company modeled and probability weighted sensitivities for first lien transactions by varying its assumptions of how fast a recovery is expected to occur. One of the variables used to model sensitivities was how quickly the CDR returned to its modeled equilibrium, which was defined as 5% of the initial CDR. The Company also stressed CPR and the speed of recovery of loss severity rates. The Company probability weighted a total of five scenarios as of June 30, 2016 . The Company used a similar approach to establish its pessimistic and optimistic scenarios as of June 30, 2016 as it used as of March 31, 2016 and December 31, 2015 , increasing and decreasing the periods of stress from those used in the base case. In a somewhat more stressful environment than that of the base case, where the CDR plateau was extended six months (to be 42 months long) before the same more gradual CDR recovery and loss severities were assumed to recover over 4.5 rather than 2.5 years (and subprime loss severities were assumed to recover only to 60% and Option ARM and Alt A loss severities to only 45% ), expected loss to be paid would increase from current projections by approximately $13 million for Alt-A first liens, $7 million for Option ARM, $43 million for subprime and $0.1 million for prime transactions. In an even more stressful scenario where loss severities were assumed to rise and then recover over nine years and the initial ramp-down of the CDR was assumed to occur over 15 months and other assumptions were the same as the other stress scenario, expected loss to be paid would increase from current projections by approximately $33 million for Alt-A first liens, $14 million for Option ARM, $59 million for subprime and $0.4 million for prime transactions. In a scenario with a somewhat less stressful environment than the base case, where CDR recovery was somewhat less gradual, expected loss to be paid would decrease from current projections by approximately $6 million for Alt-A first liens, $21 million for Option ARM, $10 million for subprime and $17 thousand for prime transactions. In an even less stressful scenario where the CDR plateau was six months shorter ( 30 months, effectively assuming that liquidation rates would improve) and the CDR recovery was more pronounced (including an initial ramp-down of the CDR over nine months), expected loss to be paid would decrease from current projections by approximately $18 million for Alt-A first liens, $32 million for Option ARM, $35 million for subprime and $0.1 million for prime transactions. U.S. Second Lien RMBS Loss Projections Second lien RMBS transactions include both home equity lines of credit ("HELOC") and closed end second lien. The Company believes the primary variable affecting its expected losses in second lien RMBS transactions is the amount and timing of future losses in the collateral pool supporting the transactions. Expected losses are also a function of the structure of the transaction; the voluntary prepayment rate (typically also referred to as CPR of the collateral); the interest rate environment; and assumptions about the draw rate and loss severity. In second lien transactions the projection of near-term defaults from currently delinquent loans is relatively straightforward because loans in second lien transactions are generally “charged off” (treated as defaulted) by the securitization’s servicer once the loan is 180 days past due. The Company estimates the amount of loans that will default over the next six months by calculating current representative liquidation rates. A liquidation rate is the percent of loans in a given cohort (in this instance, delinquency category) that ultimately default. Similar to first liens, the Company then calculates a CDR for six months, which is the period over which the currently delinquent collateral is expected to be liquidated. That CDR is then used as the basis for the plateau CDR period that follows the embedded five months of losses. Liquidation rates assumed as of June 30, 2016 were from 25% to 100% , which were the same as of March 31, 2016 . Liquidation rates assumed as of December 31, 2015 were from 10% to 100% . For the base case scenario, the CDR (the “plateau CDR”) was held constant for six months. Once the plateau period has ended, the CDR is assumed to gradually trend down in uniform increments to its final long-term steady state CDR. (The long-term steady state CDR is calculated as the constant CDR that would have yielded the amount of losses originally expected at underwriting.) In the base case scenario, the time over which the CDR trends down to its final CDR is 28 months. Therefore, the total stress period for second lien transactions is 34 months, comprising five months of delinquent data, a one month plateau period and 28 months of decrease to the steady state CDR, the same as of March 31, 2016 and December 31, 2015 . HELOC loans generally permit the borrower to pay only interest for an initial period (often ten years ) and, after that period, require the borrower to make both the monthly interest payment and a monthly principal payment, and so increase the borrower's aggregate monthly payment. Some of the HELOC loans underlying the Company's insured HELOC transactions have reached their principal amortization period. The Company has observed that the increase in monthly payments occurring when a loan reaches its principal amortization period, even if mitigated by borrower relief offered by the servicer, is associated with increased borrower defaults. Thus, most of the Company's HELOC projections incorporate an assumption that a percentage of loans reaching their amortization periods will default around the time of the payment increase. These projected defaults are in addition to those generated using the CDR curve as described above. This assumption is similar to the one used as of March 31, 2016 and December 31, 2015 . For June 30, 2016 the Company used the same general approach as of March 31, 2016 and December 31, 2015 . When a second lien loan defaults, there is generally a very low recovery. The Company had assumed as of June

Financial Guaranty Insurance

Financial Guaranty Insurance	6 Months Ended
	Jun. 30, 2016
Insurance [Abstract]
Financial Guaranty Insurance	Financial Guaranty Insurance Financial Guaranty Insurance Premiums The portfolio of outstanding exposures discussed in Note 4, Outstanding Exposure, includes financial guaranty contracts that meet the definition of insurance contracts as well as those that meet the definition of a derivative under GAAP. Amounts presented in this note relate to financial guaranty insurance contracts, unless otherwise noted. See Note 8, Financial Guaranty Contracts Accounted for as Credit Derivatives for amounts that relate to CDS and Note 9, Consolidated Variable Interest Entities for amounts that relate to FG VIEs. Net Earned Premiums Second Quarter Six Months 2016 2015 2016 2015 (in millions) Scheduled net earned premiums $ 93 $ 118 $ 184 $ 214 Acceleration of net earned premiums (1) 117 96 206 137 Accretion of discount on net premiums receivable 4 5 7 9 Financial guaranty insurance net earned premiums 214 219 397 360 Other — 0 0 1 Net earned premiums (2) $ 214 $ 219 $ 397 $ 361 ___________________ (1) Reflects the unscheduled refunding or termination of the insurance on an insured obligation as well as changes in scheduled earnings due to changes in the expected lives of the insured obligations. (2) Excludes $3 million and $5 million for Second Quarter 2016 and 2015 , respectively, and $8 million and $10 million for Six Months 2016 and 2015 , respectively, related to consolidated FG VIEs. Components of Unearned Premium Reserve As of June 30, 2016 As of December 31, 2015 Gross Ceded Net(1) Gross Ceded Net(1) (in millions) Deferred premium revenue 3,641 230 3,411 4,008 238 3,770 Contra-paid (2) (24 ) (2 ) (22 ) (12 ) (6 ) (6 ) Unearned premium reserve $ 3,617 $ 228 $ 3,389 $ 3,996 $ 232 $ 3,764 ____________________ (1) Excludes $98 million and $110 million of deferred premium revenue, and $30 million and $30 million of contra-paid related to FG VIEs as of June 30, 2016 and December 31, 2015 , respectively. (2) See "Financial Guaranty Insurance Losses– Insurance Contracts' Loss Information" below for an explanation of "contra-paid". Gross Premium Receivable, Net of Commissions on Assumed Business Roll Forward Six Months 2016 2015 (in millions) Beginning of period, December 31 $ 693 $ 729 Premiums receivable acquired in Radian Asset Acquisition on April 1, 2015 — 2 Gross written premiums, net of commissions on assumed business 83 61 Gross premiums received, net of commissions on assumed business (107 ) (79 ) Adjustments: Changes in the expected term (27 ) (9 ) Accretion of discount, net of commissions on assumed business 3 10 Foreign exchange translation (22 ) (8 ) Consolidation/deconsolidation of FG VIEs 0 (4 ) End of period, June 30 (1) $ 623 $ 702 ____________________ (1) Excludes $11 million and $23 million as of June 30, 2016 and June 30, 2015 , respectively, related to consolidated FG VIEs. Excludes $1 million related to non-financial guaranty line of business as of June 30, 2015. Foreign exchange translation relates to installment premium receivables denominated in currencies other than the U.S. dollar. Approximately 55% , 52% and 50% of installment premiums at June 30, 2016 , December 31, 2015 and June 30, 2015 , respectively, are denominated in currencies other than the U.S. dollar, primarily the Euro and British Pound Sterling. The timing and cumulative amount of actual collections may differ from expected collections in the tables below due to factors such as foreign exchange rate fluctuations, counterparty collectability issues, accelerations, commutations and changes in expected lives. Expected Collections of Financial Guaranty Insurance Gross Premiums Receivable, Net of Commissions on Assumed Business (Undiscounted) As of June 30, 2016 (in millions) 2016 (July 1 – September 30) $ 21 2016 (October 1 – December 31) 21 2017 66 2018 59 2019 54 2020 53 2021-2025 212 2026-2030 139 2031-2035 97 After 2035 79 Total(1) $ 801 ____________________ (1) Excludes expected cash collections on FG VIEs of $14 million . Scheduled Financial Guaranty Insurance Net Earned Premiums As of June 30, 2016 (in millions) 2016 (July 1 – September 30) $ 89 2016 (October 1 – December 31) 85 2017 313 2018 287 2019 258 2020 236 2021-2025 922 2026-2030 588 2031-2035 350 After 2035 283 Net deferred premium revenue(1) 3,411 Future accretion 166 Total future net earned premiums $ 3,577 ____________________ (1) Excludes scheduled net earned premiums on consolidated FG VIEs of $98 million . Selected Information for Financial Guaranty Insurance Policies Paid in Installments As of As of (dollars in millions) Premiums receivable, net of commission payable $ 623 $ 693 Gross deferred premium revenue 1,086 1,240 Weighted-average risk-free rate used to discount premiums 3.1 % 3.1 % Weighted-average period of premiums receivable (in years) 9.2 9.4 Financial Guaranty Insurance Losses Insurance Contracts' Loss Information The following table provides information on loss and LAE reserves and salvage and subrogation recoverable, net of reinsurance. The Company used weighted average risk-free rates for U.S. dollar denominated financial guaranty insurance obligations that ranged from 0.0% to 2.46% as of June 30, 2016 and 0.0% to 3.25% as of December 31, 2015 . Loss and LAE Reserve and Salvage and Subrogation Recoverable Net of Reinsurance Insurance Contracts As of June 30, 2016 As of December 31, 2015 Loss and LAE Reserve, net Salvage and Subrogation Recoverable, net Net Reserve (Recoverable) Loss and LAE Reserve, net Salvage and Subrogation Recoverable, net Net Reserve (Recoverable) (in millions) Public Finance: U.S. public finance $ 807 $ 14 $ 793 $ 604 $ 7 $ 597 Non-U.S. public finance 24 — 24 25 — 25 Public Finance 831 14 817 629 7 622 Structured Finance: U.S. RMBS: First lien: Prime first lien 3 — 3 2 — 2 Alt-A first lien 40 184 (144 ) 46 — 46 Option ARM 9 58 (49 ) 13 42 (29 ) Subprime 147 14 133 169 21 148 First lien 199 256 (57 ) 230 63 167 Second lien 84 45 39 32 53 (21 ) Total U.S. RMBS 283 301 (18 ) 262 116 146 Triple-X life insurance transactions 83 — 83 82 — 82 Student loans 30 — 30 51 — 51 Other structured finance 30 1 29 48 — 48 Structured Finance 426 302 124 443 116 327 Subtotal 1,257 316 941 1,072 123 949 Other recoverables — 3 (3 ) — 3 (3 ) Subtotal 1,257 319 938 1,072 126 946 Effect of consolidating FG VIEs (71 ) — (71 ) (74 ) 0 (74 ) Total (1) $ 1,186 $ 319 $ 867 $ 998 $ 126 $ 872 ____________________ (1) See “Components of Net Reserves (Salvage)” table for loss and LAE reserve and salvage and subrogation recoverable components. Components of Net Reserves (Salvage) As of As of (in millions) Loss and LAE reserve $ 1,268 $ 1,067 Reinsurance recoverable on unpaid losses (82 ) (69 ) Loss and LAE reserve, net 1,186 998 Salvage and subrogation recoverable (323 ) (126 ) Salvage and subrogation payable(1) 7 3 Other recoverables (3 ) (3 ) Salvage and subrogation recoverable, net and other recoverable (319 ) (126 ) Net reserves (salvage) $ 867 $ 872 ____________________ (1) Recorded as a component of reinsurance balances payable. The table below provides a reconciliation of net expected loss to be paid to net expected loss to be expensed. Expected loss to be paid differs from expected loss to be expensed due to: (i) the contra-paid which represent the claim payments made and recoveries received that have not yet been recognized in the statement of operations, (ii) salvage and subrogation recoverable for transactions that are in a net recovery position where the Company has not yet received recoveries on claims previously paid (having the effect of reducing net expected loss to be paid by the amount of the previously paid claim and the expected recovery), but will have no future income effect (because the previously paid claims and the corresponding recovery of those claims will offset in income in future periods), and (iii) loss reserves that have already been established (and therefore expensed but not yet paid). Reconciliation of Net Expected Loss to be Paid and Net Expected Loss to be Expensed Financial Guaranty Insurance Contracts As of (in millions) Net expected loss to be paid - financial guaranty insurance (1) $ 1,208 Contra-paid, net 22 Salvage and subrogation recoverable, net of reinsurance 316 Loss and LAE reserve - financial guaranty insurance contracts, net of reinsurance (1,185 ) Other recoveries 3 Net expected loss to be expensed (present value) (2) $ 364 ____________________ (1) See "Net Expected Loss to be Paid (Recovered) by Accounting Model" table in Note 5, Expected Loss to be Paid. (2) Excludes $72 million as of June 30, 2016 , related to consolidated FG VIEs. The following table provides a schedule of the expected timing of net expected losses to be expensed. The amount and timing of actual loss and LAE may differ from the estimates shown below due to factors such as accelerations, commutations, changes in expected lives and updates to loss estimates. This table excludes amounts related to FG VIEs, which are eliminated in consolidation. Net Expected Loss to be Expensed Financial Guaranty Insurance Contracts As of (in millions) 2016 (July 1 – September 30) $ 9 2016 (October 1 – December 31) 8 Subtotal 2016 17 2017 30 2018 28 2019 29 2020 27 2021-2025 103 2026-2030 71 2031-2035 40 After 2035 19 Net expected loss to be expensed 364 Future accretion 199 Total expected future loss and LAE $ 563 The following table presents the loss and LAE recorded in the consolidated statements of operations by sector for insurance contracts. Amounts presented are net of reinsurance. Loss and LAE Reported on the Consolidated Statements of Operations Second Quarter Six Months 2016 2015 2016 2015 (in millions) Public Finance: U.S. public finance $ 116 $ 196 $ 213 $ 209 Non-U.S. public finance (1 ) 1 (1 ) 6 Public finance 115 197 212 215 Structured Finance: U.S. RMBS: First lien: Prime first lien (1 ) (1 ) (1 ) (1 ) Alt-A first lien 3 (9 ) 11 (11 ) Option ARM (7 ) 0 (21 ) (1 ) Subprime (11 ) 1 (7 ) 1 First lien (16 ) (9 ) (18 ) (12 ) Second lien 4 0 17 10 Total U.S. RMBS (12 ) (9 ) (1 ) (2 ) Triple-X life insurance transactions (1 ) 1 2 7 Student loans 0 1 (14 ) (5 ) Other structured finance (3 ) 0 (3 ) (2 ) Structured finance (16 ) (7 ) (16 ) (2 ) Loss and LAE on insurance contracts before FG VIE consolidation 99 190 196 213 Effect of consolidating FG VIEs 3 (2 ) (4 ) (7 ) Loss and LAE $ 102 $ 188 $ 192 $ 206 The following table provides information on financial guaranty insurance contracts categorized as BIG. Financial Guaranty Insurance BIG Transaction Loss Summary As of June 30, 2016 BIG Categories BIG 1 BIG 2 BIG 3 Total BIG, Net Effect of Consolidating FG VIEs Total Gross Ceded Gross Ceded Gross Ceded (dollars in millions) Number of risks(1) 198 (42 ) 76 (12 ) 131 (46 ) 405 — 405 Remaining weighted-average contract period (in years) 9.8 7.4 12.7 10.0 6.6 5.1 10.1 — 10.1 Outstanding exposure: Principal $ 7,012 $ (466 ) $ 4,571 $ (452 ) $ 3,276 $ (237 ) $ 13,704 $ — $ 13,704 Interest 3,618 (200 ) 2,991 (228 ) 937 (50 ) 7,068 — 7,068 Total(2) $ 10,630 $ (666 ) $ 7,562 $ (680 ) $ 4,213 $ (287 ) $ 20,772 $ — $ 20,772 Expected cash outflows (inflows) $ 331 $ (27 ) $ 1,466 $ (82 ) $ 1,228 $ (57 ) $ 2,859 $ (330 ) $ 2,529 Potential recoveries Undiscounted R&W 122 (3 ) (2 ) — (33 ) 1 85 — 85 Other(3) (667 ) 16 (298 ) 11 (499 ) 30 (1,407 ) 200 (1,207 ) Total potential recoveries (545 ) 13 (300 ) 11 (532 ) 31 (1,322 ) 200 (1,122 ) Subtotal (214 ) (14 ) 1,166 (71 ) 696 (26 ) 1,537 (130 ) 1,407 Discount 133 (3 ) (232 ) 12 (29 ) (97 ) (216 ) 17 (199 ) Present value of expected cash flows $ (81 ) $ (17 ) $ 934 $ (59 ) $ 667 $ (123 ) $ 1,321 $ (113 ) $ 1,208 Deferred premium revenue $ 256 $ (8 ) $ 152 $ (7 ) $ 347 $ (32 ) $ 708 $ (94 ) $ 614 Reserves (salvage) $ (177 ) $ (11 ) $ 811 $ (53 ) $ 378 $ (11 ) $ 937 $ (71 ) $ 866 Financial Guaranty Insurance BIG Transaction Loss Summary As of December 31, 2015 BIG Categories BIG 1 BIG 2 BIG 3 Total BIG, Net Effect of Consolidating FG VIEs Total Gross Ceded Gross Ceded Gross Ceded (dollars in millions) Number of risks(1) 202 (46 ) 85 (13 ) 132 (44 ) 419 — 419 Remaining weighted-average contract period (in years) 10.0 8.7 13.8 9.5 7.7 5.9 10.7 — 10.7 Outstanding exposure: Principal $ 7,751 $ (732 ) $ 3,895 $ (240 ) $ 3,087 $ (187 ) $ 13,574 $ — $ 13,574 Interest 4,109 (354 ) 2,805 (110 ) 1,011 (42 ) 7,419 — 7,419 Total(2) $ 11,860 $ (1,086 ) $ 6,700 $ (350 ) $ 4,098 $ (229 ) $ 20,993 $ — $ 20,993 Expected cash outflows (inflows) $ 386 $ (42 ) $ 1,158 $ (60 ) $ 1,464 $ (53 ) $ 2,853 $ (343 ) $ 2,510 Potential recoveries Undiscounted R&W 69 (2 ) (49 ) 1 (85 ) 5 (61 ) 7 (54 ) Other(3) (441 ) 14 (118 ) 7 (587 ) 19 (1,106 ) 175 (931 ) Total potential recoveries (372 ) 12 (167 ) 8 (672 ) 24 (1,167 ) 182 (985 ) Subtotal 14 (30 ) 991 (52 ) 792 (29 ) 1,686 (161 ) 1,525 Discount 91 3 (286 ) 12 (58 ) (89 ) (327 ) 41 (286 ) Present value of expected cash flows $ 105 $ (27 ) $ 705 $ (40 ) $ 734 $ (118 ) $ 1,359 $ (120 ) $ 1,239 Deferred premium revenue $ 371 $ (37 ) $ 150 $ (4 ) $ 386 $ (32 ) $ 834 $ (100 ) $ 734 Reserves (salvage) $ 2 $ (19 ) $ 591 $ (38 ) $ 404 $ (9 ) $ 931 $ (74 ) $ 857 ____________________ (1) A risk represents the aggregate of the financial guaranty policies that share the same revenue source for purposes of making debt service payments. The ceded number of risks represents the number of risks for which the Company ceded a portion of its exposure. (2) Includes BIG amounts related to FG VIEs. (3) Includes excess spread. Ratings Impact on Financial Guaranty Business A downgrade of one of AGL’s insurance subsidiaries may result in increased claims under financial guaranties issued by the Company, if the insured obligors were unable to pay. For example, AGM has issued financial guaranty insurance policies in respect of the obligations of municipal obligors under interest rate swaps. AGM insures periodic payments owed by the municipal obligors to the bank counterparties. In certain cases, AGM also insures termination payments that may be owed by the municipal obligors to the bank counterparties. If (i) AGM has been downgraded below the rating trigger set forth in a swap under which it has insured the termination payment, which rating trigger varies on a transaction by transaction basis; (ii) the municipal obligor has the right to cure by, but has failed in, posting collateral, replacing AGM or otherwise curing the downgrade of AGM; (iii) the transaction documents include as a condition that an event of default or termination event with respect to the municipal obligor has occurred, such as the rating of the municipal obligor being downgraded past a specified level, and such condition has been met; (iv) the bank counterparty has elected to terminate the swap; (v) a termination payment is payable by the municipal obligor; and (vi) the municipal obligor has failed to make the termination payment payable by it, then AGM would be required to pay the termination payment due by the municipal obligor, in an amount not to exceed the policy limit set forth in the financial guaranty insurance policy. At AGM's current financial strength ratings, if the conditions giving rise to the obligation of AGM to make a termination payment under the swap termination policies were all satisfied, then AGM could pay claims in an amount not exceeding approximately $193 million in respect of such termination payments. Taking into consideration whether the rating of the municipal obligor is below any applicable specified trigger, if the financial strength ratings of AGM were further downgraded below "A" by S&P or below "A2" by Moody's, and the conditions giving rise to the obligation of AGM to make a payment under the swap policies were all satisfied, then AGM could pay claims in an additional amount not exceeding approximately $455 million in respect of such termination payments. As another example, with respect to variable rate demand obligations ("VRDOs") for which a bank has agreed to provide a liquidity facility, a downgrade of AGM or AGC may provide the bank with the right to give notice to bondholders that the bank will terminate the liquidity facility, causing the bondholders to tender their bonds to the bank. Bonds held by the bank accrue interest at a “bank bond rate” that is higher than the rate otherwise borne by the bond (typically the prime rate plus 2.00% — 3.00% , and capped at the lesser of 25% and the maximum legal limit). In the event the bank holds such bonds for longer than a specified period of time, usually 90 - 180 days , the bank has the right to demand accelerated repayment of bond principal, usually through payment of equal installments over a period of not less than five years . In the event that a municipal obligor is unable to pay interest accruing at the bank bond rate or to pay principal during the shortened amortization period, a claim could be submitted to AGM or AGC under its financial guaranty policy. As of June 30, 2016 , AGM and AGC had insured approximately $5.4 billion net par of VRDOs, of which approximately $0.3 billion of net par constituted VRDOs issued by municipal obligors rated BBB- or lower pursuant to the Company’s internal rating. The specific terms relating to the rating levels that trigger the bank’s termination right, and whether it is triggered by a downgrade by one rating agency or a downgrade by all rating agencies then rating the insurer, vary depending on the transaction. In addition, AGM may be required to pay claims in respect of AGMH’s former financial products business if Dexia SA and its affiliates, from which the Company had purchased AGMH and its subsidiaries, do not comply with their obligations following a downgrade of the financial strength rating of AGM. Most of the guaranteed investment contracts ("GICs") insured by AGM allow the GIC holder to terminate the GIC and withdraw the funds in the event of a downgrade of AGM below A3 or A-, with no right of the GIC issuer to avoid such withdrawal by posting collateral or otherwise enhancing its credit. Each GIC contract stipulates the thresholds below which the GIC issuer must post eligible collateral, along with the types of securities eligible for posting and the collateralization percentage applicable to each security type. These collateralization percentages range from 100% of the GIC balance for cash posted as collateral to, typically, 108% for asset-backed securities. If the entire aggregate accreted GIC balance of approximately $1.7 billion as of June 30, 2016 were terminated, the assets of the GIC issuers (which had an aggregate market value which exceed the liabilities by $0.8 billion ) would be sufficient to fund the withdrawal of the GIC funds.

Fair Value Measurement

Fair Value Measurement	6 Months Ended
	Jun. 30, 2016
Fair Value Disclosures [Abstract]
Fair Value Measurement	Fair Value Measurement The Company carries a significant portion of its assets and liabilities at fair value. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (i.e., exit price). The price represents the price available in the principal market for the asset or liability. If there is no principal market, then the price is based on a hypothetical market that maximizes the value received for an asset or minimizes the amount paid for a liability (i.e., the most advantageous market). Fair value is based on quoted market prices, where available. If listed prices or quotes are not available, fair value is based on either internally developed models that primarily use, as inputs, market-based or independently sourced market parameters, including but not limited to yield curves, interest rates and debt prices or with the assistance of an independent third-party using a discounted cash flow approach and the third party’s proprietary pricing models. In addition to market information, models also incorporate transaction details, such as maturity of the instrument and contractual features designed to reduce the Company’s credit exposure, such as collateral rights as applicable. Valuation adjustments may be made to ensure that financial instruments are recorded at fair value. These adjustments include amounts to reflect counterparty credit quality, the Company’s creditworthiness and constraints on liquidity. As markets and products develop and the pricing for certain products becomes more or less transparent, the Company may refine its methodologies and assumptions. During Six Months 2016 , no changes were made to the Company’s valuation models that had or are expected to have, a material impact on the Company’s consolidated balance sheets or statements of operations and comprehensive income. The Company’s methods for calculating fair value produce a fair value that may not be indicative of net realizable value or reflective of future fair values. The use of different methodologies or assumptions to determine fair value of certain financial instruments could result in a different estimate of fair value at the reporting date. The categorization within the fair value hierarchy is determined 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 estimates of market assumptions. The fair value hierarchy prioritizes model inputs into three broad levels as follows, with Level 1 being the highest and Level 3 the lowest. An asset or liability’s categorization is based on the lowest level of significant input to its valuation. Level 1—Quoted prices for identical instruments in active markets. The Company generally defines an active market as a market in which trading occurs at significant volumes. Active markets generally are more liquid and have a lower bid-ask spread than an inactive market. Level 2—Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and observable inputs other than quoted prices, such as interest rates or yield curves and other inputs derived from or corroborated by observable market inputs. Level 3—Model derived valuations in which one or more significant inputs or significant value drivers are unobservable. Financial instruments are considered Level 3 when their values are determined using pricing models, discounted cash flow methodologies or similar techniques and at least one significant model assumption or input is unobservable. Level 3 financial instruments also include those for which the determination of fair value requires significant management judgment or estimation. Transfers between Levels 1, 2 and 3 are recognized at the end of the period when the transfer occurs. The Company reviews the classification between Levels 1, 2 and 3 quarterly to determine whether a transfer is necessary. During the periods presented, there were no transfers between Level 1, 2 and 3. Measured and Carried at Fair Value Fixed-Maturity Securities and Short-Term Investments The fair value of bonds in the investment portfolio is generally based on prices received from third party pricing services or alternative pricing sources with reasonable levels of price transparency. The pricing services prepare estimates of fair value measurements using their pricing models, which include available relevant market information, benchmark curves, benchmarking of like securities, and sector groupings. Additional valuation factors that can be taken into account are nominal spreads and liquidity adjustments. The pricing services evaluate each asset class based on relevant market and credit information, perceived market movements, and sector news. The market inputs used in the pricing evaluation include: benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers, reference data and industry and economic events. Benchmark yields have in many cases taken priority over reported trades for securities that trade less frequently or those that are distressed trades, and therefore may not be indicative of the market. The extent of the use of each input is dependent on the asset class and the market conditions. Given the asset class, the priority of the use of inputs may change or some market inputs may not be relevant. Additionally, the valuation of fixed-maturity investments is more subjective when markets are less liquid due to the lack of market based inputs, which may increase the potential that the estimated fair value of an investment is not reflective of the price at which an actual transaction would occur. Short-term investments, that are traded in active markets, are classified within Level 1 in the fair value hierarchy and their value is based on quoted market prices. Securities such as discount notes are classified within Level 2 because these securities are typically not actively traded due to their approaching maturity and, as such, their cost approximates fair value. Short term securities that were obtained as part of loss mitigation efforts and whose prices were determined based on models, where at least one significant model assumption or input is unobservable, are considered to be Level 3 in the fair value hierarchy. Annually, the Company reviews each pricing service’s procedures, controls and models used in the valuations of the Company’s investment portfolio, as well as the competency of the pricing service’s key personnel. In addition, on a quarterly basis, the Company holds a meeting of the internal valuation committee (comprised of individuals within the Company with market, valuation, accounting, and/or finance experience) that reviews and approves prices and assumptions used by the pricing services. For Level 1 and 2 securities, the Company, on a quarterly basis, reviews internally developed analytic packages that highlight, at a CUSIP level, price changes from the previous quarter to the current quarter. Where unexpected price movements are noted for a specific CUSIP, the Company formally challenges the price provided, and reviews all key inputs utilized in the third party’s pricing model, and compares such information to management’s own market information. For Level 3 securities, the Company, on a quarterly basis: • reviews methodologies, any model updates and inputs and compares such information to management’s own market information and, where applicable, the internal models, • reviews internally developed analytic packages that highlight, at a CUSIP level, price changes from the previous quarter to the current quarter, and evaluates, documents, and resolves any significant pricing differences with the assistance of the third party pricing source, and • compares prices received from different third party pricing sources, and evaluates, documents the rationale for, and resolves any significant pricing differences. As of June 30, 2016 , the Company used models to price 41 fixed-maturity securities (which were purchased or obtained for loss mitigation or other risk management purposes), which were 9.6% or $1,012 million of the Company’s fixed-maturity securities and short-term investments at fair value. Most Level 3 securities were priced with the assistance of an independent third-party. The pricing is based on a discounted cash flow approach using the third-party’s proprietary pricing models. The models use inputs such as projected prepayment speeds; severity assumptions; recovery lag assumptions; estimated default rates (determined on the basis of an analysis of collateral attributes, historical collateral performance, borrower profiles and other features relevant to the evaluation of collateral credit quality); home price appreciation/depreciation rates based on macroeconomic forecasts and recent trading activity. The yield used to discount the projected cash flows is determined by reviewing various attributes of the bond including collateral type, weighted average life, sensitivity to losses, vintage, and convexity, in conjunction with market data on comparable securities. Significant changes to any of these inputs could materially change the expected timing of cash flows within these securities which is a significant factor in determining the fair value of the securities. Other Invested Assets As of June 30, 2016 and December 31, 2015 , other invested assets include investments carried and measured at fair value on a recurring basis of $55 million and $53 million , respectively, and include primarily an investment in the global property catastrophe risk market and an investment in a fund that invests primarily in senior loans and bonds. Fair values for the majority of these investments are based on their respective net asset value ("NAV") per share or equivalent. Other Assets Committed Capital Securities The fair value of committed capital securities ("CCS"), which is recorded in "other assets" on the consolidated balance sheets, represents the difference between the present value of remaining expected put option premium payments under AGC’s CCS (the “AGC CCS”) and AGM’s Committed Preferred Trust Securities (the “AGM CPS”) agreements, and the estimated present value that the Company would hypothetically have to pay currently for a comparable security (see Note 15, Long Term Debt and Credit Facilities). The AGC CCS and AGM CPS are carried at fair value with changes in fair value recorded in the consolidated statement of operations. The estimated current cost of the Company’s CCS is based on several factors, including AGM and AGC CDS spreads, the U.S. dollar forward swap curve, London Interbank Offered Rate ("LIBOR") curve projections and the term the securities are estimated to remain outstanding. Supplemental Executive Retirement Plans The Company classifies the fair value measurement of the assets of the Company's various supplemental executive retirement plans as either Level 1 or Level 2. The fair value of these assets is valued based on the observable published daily values of the underlying mutual fund included in the aforementioned plans (Level 1) or based upon the NAV of the funds if a published daily value is not available (Level 2). The NAV are based on observable information. Financial Guaranty Contracts Accounted for as Credit Derivatives The Company’s credit derivatives consist primarily of insured CDS contracts, and also include interest rate swaps and hedges on other financial guarantors that fall under derivative accounting standards requiring fair value accounting through the statement of operations. The following is a description of the fair value methodology applied to the Company's insured credit default swaps that are accounted for as credit derivatives, which constitute the vast majority of the net credit derivative liability in the consolidated balance sheets. The Company did not enter into CDS with the intent to trade these contracts and the Company may not unilaterally terminate a CDS contract absent an event of default or termination event that entitles the Company to terminate such contracts; however, the Company has mutually agreed with various counterparties to terminate certain CDS transactions. Such terminations generally are not completed at fair value but instead for an amount that approximates the present value of future premiums or for a negotiated amount. The terms of the Company’s CDS contracts differ from more standardized credit derivative contracts sold by companies outside the financial guaranty industry. The non-standard terms include the absence of collateral support agreements or immediate settlement provisions. In addition, the Company employs relatively high attachment points and does not exit derivatives it sells or purchases for credit protection purposes, except under specific circumstances such as mutual agreements with counterparties. Management considers the non-standard terms of its credit derivative contracts in determining the fair value of these contracts. Due to the lack of quoted prices and other observable inputs for its instruments or for similar instruments, the Company determines the fair value of its credit derivative contracts primarily through internally developed, proprietary models that use both observable and unobservable market data inputs to derive an estimate of the fair value of the Company's contracts in its principal markets (see "Assumptions and Inputs"). There is no established market where financial guaranty insured credit derivatives are actively traded, therefore, management has determined that the exit market for the Company’s credit derivatives is a hypothetical one based on its entry market. Management has tracked the historical pricing of the Company’s deals to establish historical price points in the hypothetical market that are used in the fair value calculation. These contracts are classified as Level 3 in the fair value hierarchy since there is reliance on at least one unobservable input deemed significant to the valuation model, most importantly the Company’s estimate of the value of the non-standard terms and conditions of its credit derivative contracts and of the Company’s current credit standing. The Company’s models and the related assumptions are continuously reevaluated by management and enhanced, as appropriate, based upon improvements in modeling techniques and availability of more timely and relevant market information. The fair value of the Company’s credit derivative contracts represents the difference between the present value of remaining premiums the Company expects to receive or pay and the estimated present value of premiums that a financial guarantor of comparable credit-worthiness would hypothetically charge or pay at the reporting date for the same protection. The fair value of the Company’s credit derivatives depends on a number of factors, including notional amount of the contract, expected term, credit spreads, changes in interest rates, the credit ratings of referenced entities, the Company’s own credit risk and remaining contractual cash flows. The expected remaining contractual premium cash flows are the most readily observable inputs since they are based on the CDS contractual terms. Credit spreads capture the effect of recovery rates and performance of underlying assets of these contracts, among other factors. Consistent with previous years, market conditions at June 30, 2016 were such that market prices of the Company’s CDS contracts were not available. Management considers factors such as current prices charged for similar agreements, when available, performance of underlying assets, life of the instrument, and the nature and extent of activity in the financial guaranty credit derivative marketplace. The assumptions that management uses to determine the fair value may change in the future due to market conditions. Due to the inherent uncertainties of the assumptions used in the valuation models, actual experience may differ from the estimates reflected in the Company’s consolidated financial statements and the differences may be material. Assumptions and Inputs The various inputs and assumptions that are key to the establishment of the Company’s fair value for CDS contracts are as follows: • Gross spread. • The allocation of gross spread among: ◦ the profit the originator, usually an investment bank, realizes for putting the deal together and funding the transaction (“bank profit”); ◦ premiums paid to the Company for the Company’s credit protection provided (“net spread”); and ◦ the cost of CDS protection purchased by the originator to hedge their counterparty credit risk exposure to the Company (“hedge cost”). • The weighted average life which is based on debt service schedules. The rates used to discount future expected premium cash flows ranged from 0.47% to 1.72% at June 30, 2016 and 0.44% to 2.51% at December 31, 2015 . The Company obtains gross spreads on its outstanding contracts from market data sources published by third parties (e.g., dealer spread tables for the collateral similar to assets within the Company’s transactions), as well as collateral-specific spreads provided by trustees or obtained from market sources. If observable market credit spreads are not available or reliable for the underlying reference obligations, then market indices are used that most closely resemble the underlying reference obligations, considering asset class, credit quality rating and maturity of the underlying reference obligations. These indices are adjusted to reflect the non-standard terms of the Company’s CDS contracts. Market sources determine credit spreads by reviewing new issuance pricing for specific asset classes and receiving price quotes from their trading desks for the specific asset in question. Management validates these quotes by cross-referencing quotes received from one market source against quotes received from another market source to ensure reasonableness. In addition, the Company compares the relative change in price quotes received from one quarter to another, with the relative change experienced by published market indices for a specific asset class. Collateral specific spreads obtained from third-party, independent market sources are un-published spread quotes from market participants or market traders who are not trustees. Management obtains this information as the result of direct communication with these sources as part of the valuation process. With respect to CDS transactions for which there is an expected claim payment within the next twelve months, the allocation of gross spread reflects a higher allocation to the cost of credit rather than the bank profit component. In the current market, it is assumed that a bank would be willing to accept a lower profit on distressed transactions in order to remove these transactions from its financial statements. The following spread hierarchy is utilized in determining which source of gross spread to use, with the rule being to use CDS spreads where available. If not available, CDS spreads are either interpolated or extrapolated based on similar transactions or market indices. • Actual collateral specific credit spreads (if up-to-date and reliable market-based spreads are available). • Deals priced or closed during a specific quarter within a specific asset class and specific rating. No transactions closed during the periods presented. • Credit spreads interpolated based upon market indices. • Credit spreads provided by the counterparty of the CDS. • Credit spreads extrapolated based upon transactions of similar asset classes, similar ratings, and similar time to maturity. Information by Credit Spread Type (1) As of As of Based on actual collateral specific spreads 13 % 13 % Based on market indices 72 % 73 % Provided by the CDS counterparty 15 % 14 % Total 100 % 100 % ____________________ (1) Based on par. Over time the data inputs can change as new sources become available or existing sources are discontinued or are no longer considered to be the most appropriate. It is the Company’s objective to move to higher levels on the hierarchy whenever possible, but it is sometimes necessary to move to lower priority inputs because of discontinued data sources or management’s assessment that the higher priority inputs are no longer considered to be representative of market spreads for a given type of collateral. This can happen, for example, if transaction volume changes such that a previously used spread index is no longer viewed as being reflective of current market levels. The Company interpolates a curve based on the historical relationship between the premium the Company receives when a credit derivative is closed to the daily closing price of the market index related to the specific asset class and rating of the deal. This curve indicates expected credit spreads at each indicative level on the related market index. For transactions with unique terms or characteristics where no price quotes are available, management extrapolates credit spreads based on a similar transaction for which the Company has received a spread quote from one of the first three sources within the Company’s spread hierarchy. This alternative transaction will be within the same asset class, have similar underlying assets, similar credit ratings, and similar time to maturity. The Company then calculates the percentage of relative spread change quarter over quarter for the alternative transaction. This percentage change is then applied to the historical credit spread of the transaction for which no price quote was received in order to calculate the transactions’ current spread. Counterparties determine credit spreads by reviewing new issuance pricing for specific asset classes and receiving price quotes from their trading desks for the specific asset in question. These quotes are validated by cross-referencing quotes received from one market source with those quotes received from another market source to ensure reasonableness. The premium the Company receives is referred to as the “net spread.” The Company’s pricing model takes into account not only how credit spreads on risks that it assumes affect pricing, but also how the Company’s own credit spread affects the pricing of its deals. The Company’s own credit risk is factored into the determination of net spread based on the impact of changes in the quoted market price for credit protection bought on the Company, as reflected by quoted market prices on CDS referencing AGC or AGM. For credit spreads on the Company’s name the Company obtains the quoted price of CDS contracts traded on AGC and AGM from market data sources published by third parties. The cost to acquire CDS protection referencing AGC or AGM affects the amount of spread on CDS deals that the Company retains and, hence, their fair value. As the cost to acquire CDS protection referencing AGC or AGM increases, the amount of premium the Company retains on a deal generally decreases. As the cost to acquire CDS protection referencing AGC or AGM decreases, the amount of premium the Company retains on a deal generally increases. In the Company’s valuation model, the premium the Company captures is not permitted to go below the minimum rate that the Company would currently charge to assume similar risks. This assumption can have the effect of mitigating the amount of unrealized gains that are recognized on certain CDS contracts. Given the current market conditions and the Company’s own credit spreads, approximately 16% , 18% a nd 20% based on number of deals, of the Company's CDS contracts are fair valued using this minimum premium as of June 30, 2016 , March 31, 2016 and December 31, 2015 , respectively. The percentage of deals that price using the minimum premiums fluctuates due to changes in AGM's and AGC's credit spreads. In general when AGM's and AGC's credit spreads narrow, the cost to hedge AGM's and AGC's name declines and more transactions price above previously established floor levels. Meanwhile, when AGM's and AGC's credit spreads widen, the cost to hedge AGM's and AGC's name increases causing more transactions to price at previously established floor levels. The Company corroborates the assumptions in its fair value model, including the portion of exposure to AGC and AGM hedged by its counterparties, with independent third parties each reporting period. The current level of AGC’s and AGM’s own credit spread has resulted in the bank or deal originator hedging a significant portion of its exposure to AGC and AGM. This reduces the amount of contractual cash flows AGC and AGM can capture as premium for selling its protection. The amount of premium a financial guaranty insurance market participant can demand is inversely related to the cost of credit protection on the insurance company as measured by market credit spreads assuming all other assumptions remain constant. This is because the buyers of credit protection typically hedge a portion of their risk to the financial guarantor, due to the fact that the contractual terms of the Company's contracts typically do not require the posting of collateral by the guarantor. The extent of the hedge depends on the types of instruments insured and the current market conditions. A fair value resulting in a credit derivative asset on protection sold is the result of contractual cash inflows on in-force deals in excess of what a hypothetical financial guarantor could receive if it sold protection on the same risk as of the reporting date. If the Company were able to freely exchange these contracts (i.e., assuming its contracts did not contain proscriptions on transfer and there was a viable exchange market), it would be able to realize a gain representing the difference between the higher contractual premiums to which it is entitled and the current market premiums for a similar contract. The Company determines the fair value of its CDS contracts by applying the difference between the current net spread and the contractual net spread for the remaining duration of each contract to the notional value of its CDS contracts and taking the present value of such amounts discounted at the corresponding LIBOR over the weighted average remaining life of the contract. Example The following is an example of how changes in gross spreads, the Company’s own credit spread and the cost to buy protection on the Company affect the amount of premium the Company can demand for its credit protection. The assumptions used in these examples are hypothetical amounts. Scenario 1 represents the market conditions in effect on the transaction date and Scenario 2 represents market conditions at a subsequent reporting date. Scenario 1 Scenario 2 bps % of Total bps % of Total Original gross spread/cash bond price (in bps) 185 500 Bank profit (in bps) 115 62 % 50 10 % Hedge cost (in bps) 30 16 % 440 88 % The premium the Company receives per annum (in bps) 40 22 % 10 2 % In Scenario 1, the gross spread is 185 basis points. The bank or deal originator captures 115 basis points of the original gross spread and hedges 10% of its exposure to AGC, when the CDS spread on AGC was 300 basis points ( 300 basis points × 10% = 30 basis points). Under this scenario the Company receives premium of 40 basis points, or 22% of the gross spread. In Scenario 2, the gross spread is 500 basis points. The bank or deal originator captures 50 basis points of the original gross spread and hedges 25% of its exposure to AGC, when the CDS spread on AGC was 1,760 basis points ( 1,760 basis points × 25% = 440 basis points). Under this scenario the Company would receive premium of 10 basis points, or 2% of the gross spread. Due to the increased cost to hedge AGC’s name, the amount of profit the bank would expect to receive, and the premium the Company would expect to receive decline significantly. In this example, the contractual cash flows (the Company premium received per annum above) exceed the amount a market participant would require the Company to pay in today’s market to accept its obligations under the CDS contract, thus resulting in an asset. Strengths and Weaknesses of Model The Company’s credit derivative valuation model, like any financial model, has certain strengths and weaknesses. The primary strengths of the Company’s CDS modeling techniques are: • The model takes into account the transaction structure and the key drivers of market value. The transaction structure includes par insured, weighted average life, level of subordination and composition of collateral. • The model maximizes the use of market-driven inputs whenever they are available. The key inputs to the model are market-based spreads for the collateral, and the credit rating of referenced entities. These are viewed by the Company to be the key parameters that affect fair value of the transaction. • The model is a consistent approach to valuing positions. The Company has developed a hierarchy for market-based spread inputs that helps mitigate the degree of subjectivity during periods of high illiquidity. The primary weaknesses of the Company’s CDS modeling techniques are: • There is no exit market or actual exit transactions. Therefore the Company’s exit market is a hypothetical one based on the Company’s entry market. • There is a very limited market in which to validate the reasonableness of the fair values developed by the Company’s model. • The markets for the inputs to the model were highly illiquid, which impacts their reliability. • Due to the non-standard terms under which the Company enters into derivative contracts, the fair value of its credit derivatives may not reflect the same prices observed in an actively traded market of credit derivatives that do not contain terms and conditions similar to those observed in the financial guaranty market. These contracts were classified as Level 3 in the fair value hierarchy because there is a reliance on at least one unobservable input deemed significant to the valuation model, most significantly the Company's estimate of the value of non-standard terms and conditions of its credit derivative contracts and amount of protection purchased on AGC or AGM's name. Fair Value Option on FG VIEs’ Assets and Liabilities The Company elected the fair value option for all the FG VIEs’ assets and liabilities. See Note 9, Consolidated Variable Interest Entities. The FG VIEs issued securities collateralized by first lien and second lien RMBS as well as loans and receivables. The lowest level input that is significant to the fair value measurement of these assets and liabilities was a Level 3 input (i.e., unobservable), therefore management classified them as Level 3 in the fair value hierarchy. Prices are generally determined with the assistance of an independent third-party, based on a discounted cash flow approach. The models to price the FG VIEs’ liabilities used, where appropriate, inputs such as estimated prepayment speeds; market values of the assets that collateralize the securities; estimated default rates (determined on the basis of an analysis of collateral attributes, historical collateral performance, borrower profiles and other features relevant to the evaluation of collateral credit quality); yields implied by market prices for similar securities; house price depreciation/appreciation rates based on macroeconomic forecasts and, for those liabilities insured by the Company, the benefit from the Company’s insurance policy guaranteeing the timely payment of principal and interest, taking into account the timing of the potential default and the Company’s own credit rating. The third-party also utilizes an internal model to determine an appropriate yield at which to discount the cash flows of the security, by factoring in collateral types, weighted-average lives, and other structural attributes specific to the security being priced. The expected yield is further calibrated by utilizing algorithms designed to aggregate market color, received by the third-party, on comparable bonds. The fair value of the Company’s FG VIE assets is generally sensitive to changes related to estimated prepayment speeds; estimated default rates (determined on the basis of an analysis of collateral attributes such as: historical collateral performance, borrower profiles and other features relevant to the evaluation of collateral credit quality); discount rates

Financial Guaranty Contracts Ac

Financial Guaranty Contracts Accounted for as Credit Derivatives	6 Months Ended
	Jun. 30, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Financial Guaranty Contracts Accounted for as Credit Derivatives	Financial Guaranty Contracts Accounted for as Credit Derivatives The Company has a portfolio of financial guaranty contracts that meet the definition of a derivative in accordance with GAAP (primarily CDS). Credit derivative transactions are governed by ISDA documentation and have different characteristics from financial guaranty insurance contracts. For example, the Company’s control rights with respect to a reference obligation under a credit derivative may be more limited than when the Company issues a financial guaranty insurance contract. In addition, there are more circumstances under which the Company may be obligated to make payments. Similar to a financial guaranty insurance contract, the Company would be obligated to pay if the obligor failed to make a scheduled payment of principal or interest in full. However, the Company may also be required to pay if the obligor becomes bankrupt or if the reference obligation were restructured if, after negotiation, those credit events are specified in the documentation for the credit derivative transactions. Furthermore, the Company may be required to make a payment due to an event that is unrelated to the performance of the obligation referenced in the credit derivative. If events of default or termination events specified in the credit derivative documentation were to occur, the non-defaulting or the non-affected party, which may be either the Company or the counterparty, depending upon the circumstances, may decide to terminate a credit derivative prior to maturity. In that case, the Company may be required to make a termination payment to its swap counterparty upon such termination. Absent such an event of default or termination event, the Company may not unilaterally terminate a CDS contract; however, the Company on occasion has mutually agreed with various counterparties to terminate certain CDS transactions. Credit Derivative Net Par Outstanding by Sector The estimated remaining weighted average life of credit derivatives was 5.0 years at June 30, 2016 and 5.4 years at December 31, 2015 . The components of the Company’s credit derivative net par outstanding are presented below. Credit Derivatives Subordination and Ratings As of June 30, 2016 As of December 31, 2015 Asset Type Net Par Outstanding Original Subordination(1) Current Subordination(1) Weighted Average Credit Rating Net Par Outstanding Original Subordination(1) Current Subordination(1) Weighted Average Credit Rating (dollars in millions) Pooled corporate obligations: Collateralized loan obligation/collateral bond obligations $ 3,006 29.7 % 55.8 % AAA $ 5,873 30.9 % 42.3 % AAA Synthetic investment grade pooled corporate 7,116 21.7 19.4 AAA 7,108 21.7 19.4 AAA TruPS CDOs 2,531 45.3 44.0 A- 3,429 45.8 42.6 A- Market value CDOs of corporate obligations — — — -- 1,113 17.0 30.1 AAA Total pooled corporate obligations 12,653 28.3 33.0 AAA 17,523 29.2 32.3 AAA U.S. RMBS: Option ARM and Alt-A first lien 289 9.5 13.1 AA- 351 10.5 12.7 AA- Subprime first lien 925 27.7 45.3 AA 981 27.7 45.2 AA Prime first lien — — — -- 177 10.9 0.0 BB Closed-end second lien 15 — — CCC 17 — — CCC Total U.S. RMBS 1,229 25.1 40.7 AA 1,526 24.1 37.4 A+ CMBS 384 44.8 58.4 AAA 530 44.8 52.6 AAA Other 5,748 — — A 6,015 — — A Total $ 20,014 AA $ 25,594 AA+ ____________________ (1) Represents the sum of subordinate tranches and over-collateralization and does not include any benefit from excess interest collections that may be used to absorb losses. Except for TruPS CDOs, the Company’s exposure to pooled corporate obligations is highly diversified in terms of obligors and industries. Most pooled corporate transactions are structured to limit exposure to any given obligor and industry. The majority of the Company’s pooled corporate exposure consists of collateralized loan obligation ("CLO") or synthetic pooled corporate obligations. Most of these CLOs have an average obligor size of less than 1% of the total transaction and typically restrict the maximum exposure to any one industry to approximately 10% . The Company’s exposure also benefits from embedded credit enhancement in the transactions which allows a transaction to sustain a certain level of losses in the underlying collateral, further insulating the Company from industry specific concentrations of credit risk on these deals. The Company’s TruPS CDO asset pools are generally less diversified by obligors and industries than the typical CLO asset pool. Also, the underlying collateral in TruPS CDOs consists primarily of subordinated debt instruments such as TruPS issued by bank holding companies and similar instruments issued by insurance companies, real estate investment trusts and other real estate related issuers while CLOs typically contain primarily senior secured obligations. However, to mitigate these risks TruPS CDOs were typically structured with higher levels of embedded credit enhancement than typical CLOs. The Company’s exposure to “Other” CDS contracts is also highly diversified. It includes $1.6 billion of exposure to one pooled infrastructure transaction comprising diversified pools of international infrastructure project transactions and loans to regulated utilities. These pools were all structured with underlying credit enhancement sufficient for the Company to attach at AAA levels at origination. The remaining $4.1 billion of exposure in “Other” CDS contracts comprises numerous deals across various asset classes, such as commercial receivables, international RMBS, infrastructure, regulated utilities and consumer receivables. Distribution of Credit Derivative Net Par Outstanding by Internal Rating As of June 30, 2016 As of December 31, 2015 Ratings Net Par Outstanding % of Total Net Par Outstanding % of Total (dollars in millions) AAA $ 10,966 54.8 % $ 14,808 57.9 % AA 4,137 20.7 4,821 18.8 A 2,067 10.3 2,144 8.4 BBB 1,758 8.8 2,212 8.6 BIG 1,086 5.4 1,609 6.3 Credit derivative net par outstanding $ 20,014 100.0 % $ 25,594 100.0 % Fair Value of Credit Derivatives Net Change in Fair Value of Credit Derivatives Gain (Loss) Second Quarter Six Months 2016 2015 2016 2015 (in millions) Realized gains on credit derivatives $ 18 $ 15 $ 28 $ 38 Net credit derivative losses (paid and payable) recovered and recoverable and other settlements 6 (7 ) 4 (9 ) Realized gains (losses) and other settlements 24 8 32 29 Net unrealized gains (losses): Pooled corporate obligations 8 7 (40 ) 24 U.S. RMBS 27 62 12 137 CMBS 0 4 0 4 Other 4 9 (1 ) 20 Net unrealized gains (losses) 39 82 (29 ) 185 Net change in fair value of credit derivatives $ 63 $ 90 $ 3 $ 214 Net Par and Realized Gains from Terminations and Settlements of Credit Derivative Contracts Second Quarter Six Months 2016 2015 2016 2015 (in millions) Net par of terminated credit derivative contracts $ 2,436 $ 471 $ 2,436 $ 564 Realized gains on credit derivatives 8 2 8 13 Net unrealized gains (losses) on credit derivatives 59 0 70 (1 ) During Second Quarter 2016, unrealized fair value gains were generated primarily as a result of CDS terminations. The Company reached a settlement agreement with two CDS counterparties to terminate several CDS transactions. This was the primary driver of the unrealized fair value gains in the U.S. RMBS, pooled corporate CLO, and Other sectors. The unrealized fair value gains were partially offset by unrealized losses resulting from wider implied net spreads across all sectors. The wider implied net spreads were primarily a result of the decreased cost to buy protection in AGC’s and AGM’s name, particularly for the one year CDS spread, as the market cost of AGC’s and AGM’s credit protection decreased significantly during the period. For those CDS transactions that were pricing at or above their floor levels, when the cost of purchasing CDS protection on AGC and AGM decreased, the implied spreads that the Company would expect to receive on these transactions increased. During Six Months 2016, unrealized fair value losses were generated primarily in the TruPS CDO sector, due to wider implied net spreads. The wider implied net spreads were primarily a result of the decreased cost to buy protection in AGC’s and AGM’s name, particularly for the one year and five year CDS spread, as the market cost of AGC’s and AGM’s credit protection decreased during the period. For those CDS transactions that were pricing at or above their floor levels, when the cost of purchasing CDS protection on AGC and AGM decreased, the implied spreads that the Company would expect to receive on these transactions increased. The unrealized fair value losses were partially offset by unrealized fair value gains which resulted from the terminations of several CDS transactions during the period. The majority of the CDS transactions were terminated as a result of settlement agreements with two CDS counterparties in Second Quarter 2016, as discussed above. During Second Quarter 2015, unrealized fair value gains were generated primarily in the TruPS CDO sector, and U.S. RMBS prime first lien and Option ARM and subprime sectors, due to tighter implied net spreads. The tighter implied net spreads were primarily a result of the increased cost to buy protection in AGC’s and AGM’s name, particularly for the one year and five year CDS spread, as the market cost of AGC’s and AGM’s credit protection increased during the period. For those CDS transactions that were pricing above their floor levels, when the cost of purchasing CDS protection on AGC and AGM increased, the implied spreads that the Company would expect to receive on these transactions decreased. During Six Months 2015, unrealized fair value gains were generated primarily in the TruPS CDO sector, and U.S. RMBS prime first lien and Option ARM and subprime sectors, due to tighter implied net spreads. The tighter implied net spreads were primarily a result of the increased cost to buy protection in AGC's and AGM's name, particularly for the one year and five year CDS spread, as the market cost of AGC's and AGM's credit protection increased during the period. For those CDS transactions that were pricing above their floor levels, when the cost of purchasing CDS protection on AGC and AGM increased, the implied spreads that the Company would expect to receive on these transactions decreased. In addition, during Six Months 2015 there was a refinement in methodology to address an instance in a U.S. RMBS transaction that changed from an expected loss to an expected recovery position. This refinement resulted in approximately $49 million in fair value gains in Six Months 2015. The impact of changes in credit spreads will vary based upon the volume, tenor, interest rates, and other market conditions at the time these fair values are determined. In addition, since each transaction has unique collateral and structural terms, the underlying change in fair value of each transaction may vary considerably. The fair value of credit derivative contracts also reflects the change in the Company’s own credit cost based on the price to purchase credit protection on AGC and AGM. The Company determines its own credit risk based on quoted CDS prices traded on the Company at each balance sheet date. CDS Spread on AGC and AGM Quoted price of CDS contract (in basis points) As of As of As of As of As of As of Five-year CDS spread: AGC 265 307 376 390 317 323 AGM 265 309 366 410 341 325 One-year CDS spread AGC 45 105 139 120 60 80 AGM 47 102 131 125 80 85 Fair Value of Credit Derivatives Assets (Liabilities) and Effect of AGC and AGM Credit Spreads As of As of (in millions) Fair value of credit derivatives before effect of AGC and AGM credit spreads $ (1,170 ) $ (1,448 ) Plus: Effect of AGC and AGM credit spreads 774 1,083 Net fair value of credit derivatives $ (396 ) $ (365 ) The fair value of CDS contracts at June 30, 2016 , before considering the implications of AGC’s and AGM’s credit spreads, is a direct result of continued wide credit spreads in the fixed income security markets and ratings downgrades. The asset classes that remain most affected are TruPS and pooled corporate securities as well as 2005-2007 vintages of prime first lien, Alt-A, Option ARM and subprime RMBS deals. Comparing June 30, 2016 with December 31, 2015 , there were several CDS terminations as well as a narrowing of spreads primarily related to the Company's TruPS obligations which resulted in mark to market benefit. Management believes that the trading level of AGC’s and AGM’s credit spreads over the past several years has been due to the correlation between AGC’s and AGM’s risk profile and the current risk profile of the broader financial markets, as well as the overall lack of liquidity in the CDS market. Offsetting the benefit attributable to AGC’s and AGM’s credit spread were higher credit spreads in the fixed income security markets. The higher credit spreads in the fixed income security market are due to the lack of liquidity in the high yield CDO, TruPS CDO, and CLO markets as well as continuing market concerns over the 2005-2007 vintages of RMBS. The following table presents the fair value and the present value of expected claim payments or recoveries (i.e. net expected loss to be paid as described in Note 5) for contracts accounted for as derivatives. Net Fair Value and Expected Losses of Credit Derivatives by Sector Fair Value of Credit Derivative Asset (Liability), net Expected Loss to be (Paid) Recovered Asset Type As of As of As of As of (in millions) Pooled corporate obligations $ (124 ) $ (82 ) $ (4 ) $ (5 ) U.S. RMBS (86 ) (98 ) (29 ) (38 ) Other (186 ) (185 ) 29 27 Total $ (396 ) $ (365 ) $ (4 ) $ (16 ) Ratings Sensitivities of Credit Derivative Contracts Within the Company's insured CDS portfolio, the transaction documentation for approximately $1.0 billion in CDS gross par insured as of June 30, 2016 requires AGC to post eligible collateral to secure its obligations to make payments under such contracts. This constitutes a $2.7 billion reduction from the $3.7 billion in CDS gross par insured subject to such a requirement as of March 31, 2016, primarily due to an agreement reached in May 2016 with a CDS counterparty reducing the collateral posting requirement with that counterparty to zero . Eligible collateral is generally cash or U.S. government or agency securities; eligible collateral other than cash is valued at a discount to the face amount. • For approximately $0.8 billion of such contracts, AGC has negotiated caps such that the posting requirement cannot exceed a certain fixed amount, regardless of the mark-to-market valuation of the exposure or the financial strength ratings of AGC. For such contracts, AGC need not post on a cash basis an aggregate of more than $500 million , although the value of the collateral posted may exceed such fixed amount depending on the advance rate agreed with the counterparty for the particular type of collateral posted. The May 2016 agreement with the CDS counterparty mentioned above had the effect of reducing the aggregate cap on the amount AGC would be required to post on a cash basis from $575 million as of March 31, 2016, to $500 million as of June 30, 2016. • For the remaining approximately $208 million of such contracts, AGC could be required from time to time to post additional collateral without such cap based on movements in the mark-to-market valuation of the underlying exposure. As of June 30, 2016 , the Company was posting approximately $216 million to secure its obligations under CDS, of which approximately $17 million related to the $208 million of notional described above, as to which the obligation to collateralize is not capped. As of December 31, 2015 , the Company was posting approximately $305 million to secure its obligations under CDS, of which approximately $23 million related to $221 million of notional as to which the obligation to collateralize was not capped. The obligation to post collateral could impair the Company's liquidity and results of operations. Sensitivity to Changes in Credit Spread The following table summarizes the estimated change in fair values on the net balance of the Company’s credit derivative positions assuming immediate parallel shifts in credit spreads on AGC and AGM and on the risks that they both assume. Effect of Changes in Credit Spread As of June 30, 2016 Credit Spreads(1) Estimated Net Fair Value (Pre-Tax) Estimated Change in Gain/(Loss) (Pre-Tax) (in millions) 100% widening in spreads $ (805 ) $ (409 ) 50% widening in spreads (601 ) (205 ) 25% widening in spreads (499 ) (103 ) 10% widening in spreads (437 ) (41 ) Base Scenario (396 ) — 10% narrowing in spreads (358 ) 38 25% narrowing in spreads (301 ) 95 50% narrowing in spreads (206 ) 190 ____________________ (1) Includes the effects of spreads on both the underlying asset classes and the Company’s own credit spread.

Consolidated Variable Interest

Consolidated Variable Interest Entities	6 Months Ended
	Jun. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Consolidated Variable Interest Entities	Consolidated Variable Interest Entities Consolidated FG VIEs The Company provides financial guaranties with respect to debt obligations of special purpose entities, including VIEs. Assured Guaranty does not act as the servicer or collateral manager for any VIE obligations insured by its companies. The transaction structure generally provides certain financial protections to the Company. This financial protection can take several forms, the most common of which are overcollateralization, first loss protection (or subordination) and excess spread. In the case of overcollateralization (i.e., the principal amount of the securitized assets exceeds the principal amount of the structured finance obligations guaranteed by the Company), the structure allows defaults of the securitized assets before a default is experienced on the structured finance obligation guaranteed by the Company. In the case of first loss, the financial guaranty insurance policy only covers a senior layer of losses experienced by multiple obligations issued by special purpose entities, including VIEs. The first loss exposure with respect to the assets is either retained by the seller or sold off in the form of equity or mezzanine debt to other investors. In the case of excess spread, the financial assets contributed to special purpose entities, including VIEs, generate interest income that are in excess of the interest payments on the debt issued by the special purpose entity. Such excess spread is typically distributed through the transaction’s cash flow waterfall and may be used to create additional credit enhancement, applied to redeem debt issued by the special purpose entities, including VIEs (thereby, creating additional overcollateralization), or distributed to equity or other investors in the transaction. Assured Guaranty is not primarily liable for the debt obligations issued by the VIEs it insures and would only be required to make payments on those insured debt obligations in the event that the issuer of such debt obligations defaults on any principal or interest due and only for the amount of the shortfall. AGL’s and its Subsidiaries’ creditors do not have any rights with regard to the collateral supporting the debt issued by the FG VIEs. Proceeds from sales, maturities, prepayments and interest from such underlying collateral may only be used to pay debt service on VIE liabilities. Net fair value gains and losses on FG VIEs are expected to reverse to zero at maturity of the VIE debt, except for net premiums received and net claims paid by Assured Guaranty under the financial guaranty insurance contract. The Company’s estimate of expected loss to be paid for FG VIEs is included in Note 5, Expected Loss to be Paid. As part of the terms of its financial guaranty contracts, the Company obtains certain protective rights with respect to the VIE that are triggered by the occurrence of certain events, such as failure to be in compliance with a covenant due to poor deal performance or a deterioration in a servicer or collateral manager's financial condition. At deal inception, the Company typically is not deemed to control a VIE; however, once a trigger event occurs, the Company's control of the VIE typically increases. The Company continuously evaluates its power to direct the activities that most significantly impact the economic performance of VIEs that have debt obligations insured by the Company and, accordingly, where the Company is obligated to absorb VIE losses or receive benefits that could potentially be significant to the VIE. The Company obtains protective rights under its insurance contracts that give the Company additional controls over a VIE if there is either deterioration of deal performance or in the financial health of the deal servicer. The Company is deemed to be the control party for certain VIEs under GAAP, typically when its protective rights give it the power to both terminate and replace the deal servicer, which are characteristics specific to the Company's financial guaranty contracts. If the protective rights that could make the Company the control party have not been triggered, then the VIE is not consolidated. If the Company is deemed no longer to have those protective rights, the transaction is deconsolidated. Number of FG VIEs Consolidated Six Months 2016 2015 Beginning of the period, December 31 34 32 Radian Asset Acquisition — 4 Consolidated (1) — 1 Deconsolidated (1) (1 ) — Matured (1 ) — End of the period, June 30 32 37 ____________________ (1) Net loss on deconsolidation was de minimis in Six Months 2016 , and net loss on consolidation was $26 million in Six Months 2015 , and recorded in “fair value gains (losses) on FG VIEs” in the consolidated statement of operations. The total unpaid principal balance for the FG VIEs’ assets that were over 90 days or more past due was approximately $142 million at June 30, 2016 and $154 million at December 31, 2015 . The aggregate unpaid principal of the FG VIEs’ assets was approximately $655 million greater than the aggregate fair value at June 30, 2016 . The aggregate unpaid principal of the FG VIEs’ assets was approximately $804 million greater than the aggregate fair value at December 31, 2015 , excluding the effect of R&W settlements. The change in the instrument-specific credit risk of the FG VIEs’ assets held as of June 30, 2016 that was recorded in the consolidated statements of operations for Second Quarter 2016 and Six Months 2016 were losses of $3 million and gains of $31 million , respectively. The change in the instrument-specific credit risk of the FG VIEs’ assets held as of June 30, 2015 that was recorded in the consolidated statements of operations for Second Quarter 2015 and Six Months 2015 were losses of $50 million and $32 million , respectively. To calculate the instrument specific credit risk, the changes in the fair value of the FG VIE assets are allocated between changes that are due to the instrument specific credit risk and changes due to other factors, including interest rates. The instrument specific credit risk amount is determined by using expected contractual cash flows versus current expected cash flows discounted at original contractual rate. The net present value is calculated by discounting the expected cash flows of the underlying security, excluding the Company’s financial guaranty insurance, at the relevant effective interest rate. The unpaid principal for FG VIE liabilities with recourse, which represent obligations insured by AGC or AGM, was $885 million and $1,436 million as of June 30, 2016 and December 31, 2015 , respectively. FG VIE liabilities with recourse will mature at various dates ranging from 2025 to 2038 . The aggregate unpaid principal balance of the FG VIE liabilities with and without recourse was approximately $287 million greater than the aggregate fair value of the FG VIEs’ liabilities as of June 30, 2016 . The aggregate unpaid principal balance was approximately $423 million greater than the aggregate fair value of the FG VIEs' liabilities as of December 31, 2015 . The table below shows the carrying value of the consolidated FG VIEs’ assets and liabilities in the consolidated financial statements, segregated by the types of assets that collateralize their respective debt obligations for FG VIE liabilities with recourse. Consolidated FG VIEs By Type of Collateral As of June 30, 2016 As of December 31, 2015 Assets Liabilities Assets Liabilities (in millions) With recourse: U.S. RMBS first lien $ 442 $ 477 $ 506 $ 521 U.S. RMBS second lien 174 235 194 273 Life insurance — — 347 347 Manufactured housing 78 78 84 84 Total with recourse 694 790 1,131 1,225 Without recourse 120 115 130 124 Total $ 814 $ 905 $ 1,261 $ 1,349 The consolidation of FG VIEs has a significant effect on net income and shareholders' equity due to (i) changes in fair value gains (losses) on FG VIE assets and liabilities, (ii) the elimination of premiums and losses related to the AGC and AGM FG VIE liabilities with recourse and (iii) the elimination of investment balances related to the Company’s purchase of AGC and AGM insured FG VIE debt. Upon consolidation of a FG VIE, the related insurance and, if applicable, the related investment balances, are considered intercompany transactions and therefore eliminated. Such eliminations are included in the table below to present the full effect of consolidating FG VIEs. Effect of Consolidating FG VIEs on Net Income, Cash Flows From Operating Activities and Shareholders' Equity Second Quarter Six Months 2016 2015 2016 2015 (in millions) Net earned premiums $ (3 ) $ (5 ) $ (8 ) $ (10 ) Net investment income (2 ) (3 ) (7 ) (6 ) Net realized investment gains (losses) 0 3 1 3 Fair value gains (losses) on FG VIEs 4 5 22 (2 ) Bargain purchase gain — 2 — 2 Loss and LAE (2 ) 2 4 7 Effect on income before tax (3 ) 4 12 (6 ) Less: tax provision (benefit) (1 ) 1 4 (3 ) Effect on net income (loss) $ (2 ) $ 3 $ 8 $ (3 ) Effect on cash flows from operating activities $ (1 ) $ 15 $ 5 $ 33 As of As of (in millions) Effect on shareholders' equity (decrease) increase $ (12 ) $ (23 ) Fair value gains (losses) on FG VIEs represent the net change in fair value on the consolidated FG VIEs’ assets and liabilities. During Second Quarter and Six Months 2016, the Company recorded a pre-tax net fair value gain on consolidated FG VIEs of $4 million and $22 million respectively. The primary driver of the gains was mark-to-market gains due to price appreciation on the FG VIE assets during the quarter and six months period resulting from improvements in the underlying collateral. During Second Quarter 2015, the Company recorded a pre-tax net fair value gain on consolidated FG VIEs of $5 million . The primary driver of the gain was mark-to-market gains due to price appreciation on the FG VIE assets during the quarter resulting from improvements in the underlying collateral. During Six Months 2015, the Company recorded a pre-tax net fair value loss on consolidated FG VIEs of $2 million . The primary driver of the loss was a pre-tax loss of $26 million on the consolidation of one new FG VIE which was partially offset by net mark-to-market gains due to price appreciation on the FG VIE assets resulting from improvements in the underlying collateral. Other Consolidated VIEs In certain instances where the Company consolidates a VIE that was established as part of a loss mitigation negotiation settlement agreement that results in the termination of the original insured financial guaranty insurance or credit derivative contract the Company classifies the assets and liabilities of those VIEs in the line items that most accurately reflect the nature of the items, as opposed to within the FG VIE assets and FG VIE liabilities. Non-Consolidated VIEs As of June 30, 2016 and December 31, 2015 , the Company had financial guaranty contracts outstanding for approximately 670 and 750 VIEs, respectively, that it did not consolidate. To date, the Company’s analyses have indicated that it does not have a controlling financial interest in any other VIEs and, as a result, they are not consolidated. The Company’s exposure provided through its financial guaranties with respect to debt obligations of special purpose entities is included within net par outstanding in Note 4, Outstanding Exposure.

Investments and Cash

Investments and Cash	6 Months Ended
	Jun. 30, 2016
Investments, Debt and Equity Securities [Abstract]
Investments and Cash	Investments and Cash Net Investment Income and Realized Gains (Losses) Net investment income is a function of the yield that the Company earns on invested assets and the size of the portfolio. The investment yield is a function of market interest rates at the time of investment as well as the type, credit quality and maturity of the invested assets. Accrued investment income, which is recorded in Other Assets, was $ 89 million and $ 99 million as of June 30, 2016 and December 31, 2015 , respectively. Net Investment Income Second Quarter Six Months 2016 2015 2016 2015 (in millions) Income from fixed-maturity securities managed by third parties $ 77 $ 85 $ 156 $ 167 Income from internally managed securities: Fixed maturities 22 14 39 29 Other 1 1 6 7 Gross investment income 100 100 201 203 Investment expenses (2 ) (2 ) (4 ) (4 ) Net investment income $ 98 $ 98 $ 197 $ 199 Net Realized Investment Gains (Losses) Second Quarter Six Months 2016 2015 2016 2015 (in millions) Gross realized gains on available-for-sale securities $ 14 $ 8 $ 20 $ 32 Gross realized losses on available-for-sale securities 0 (6 ) (2 ) (7 ) Net realized gains (losses) on other invested assets 1 1 0 1 Other-than-temporary impairment (5 ) (12 ) (21 ) (19 ) Net realized investment gains (losses) $ 10 $ (9 ) $ (3 ) $ 7 The following table presents the roll-forward of the credit losses of fixed-maturity securities for which the Company has recognized an other-than-temporary-impairment and where the portion of the fair value adjustment related to other factors was recognized in other comprehensive income ("OCI"). Roll Forward of Credit Losses in the Investment Portfolio Second Quarter Six Months 2016 2015 2016 2015 (in millions) Balance, beginning of period $ 107 $ 106 $ 108 $ 124 Additions for credit losses on securities for which an other-than-temporary-impairment was not previously recognized 0 0 2 0 Reductions for securities sold and other settlement during the period (2 ) (7 ) (4 ) (28 ) Additions for credit losses on securities for which an other-than-temporary-impairment was previously recognized 3 5 2 8 Balance, end of period $ 108 $ 104 $ 108 $ 104 Investment Portfolio Fixed-Maturity Securities and Short-Term Investments by Security Type As of June 30, 2016 Investment Category Percent of Total(1) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value AOCI(2) Gain (Loss) on Securities with Other-Than-Temporary Impairment Weighted Average Credit Rating (3) (dollars in millions) Fixed-maturity securities: Obligations of state and political subdivisions 52 % $ 5,143 $ 461 $ (1 ) $ 5,603 $ 17 AA- U.S. government and agencies 3 299 27 0 326 — AA+ Corporate securities 14 1,402 79 (38 ) 1,443 (29 ) A- Mortgage-backed securities(4): 0 RMBS 10 1,037 44 (19 ) 1,062 (9 ) A CMBS 5 505 34 0 539 — AAA Asset-backed securities 7 745 2 (17 ) 730 (15 ) B+ Foreign government securities 3 270 5 (18 ) 257 — AA Total fixed-maturity securities 94 9,401 652 (93 ) 9,960 (36 ) A+ Short-term investments 6 585 0 0 585 — AAA Total investment portfolio 100 % $ 9,986 $ 652 $ (93 ) $ 10,545 $ (36 ) A+ Fixed-Maturity Securities and Short-Term Investments by Security Type As of December 31, 2015 Investment Category Percent of Total(1) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value AOCI Gain (Loss) on Securities with Other-Than-Temporary Impairment Weighted Average Credit Rating (3) (dollars in millions) Fixed-maturity securities: Obligations of state and political subdivisions 52 % $ 5,528 $ 323 $ (10 ) $ 5,841 $ 5 AA U.S. government and agencies 3 377 23 0 400 — AA+ Corporate securities 14 1,505 38 (23 ) 1,520 (13 ) A- Mortgage-backed securities(4): RMBS 11 1,238 29 (22 ) 1,245 (7 ) A CMBS 5 506 9 (2 ) 513 — AAA Asset-backed securities 8 831 4 (10 ) 825 (6 ) B+ Foreign government securities 3 290 4 (11 ) 283 — AA+ Total fixed-maturity securities 96 10,275 430 (78 ) 10,627 (21 ) A+ Short-term investments 4 396 0 0 396 — AA- Total investment portfolio 100 % $ 10,671 $ 430 $ (78 ) $ 11,023 $ (21 ) A+ ____________________ (1) Based on amortized cost. (2) Accumulated OCI. See also Note 17, Shareholders' Equity for additional information as applicable. (3) Ratings in the tables above represent the lower of the Moody’s and S&P classifications except for bonds purchased for loss mitigation or risk management strategies, which use internal ratings classifications. The Company’s portfolio consists primarily of high-quality, liquid instruments. (4) Government-agency obligations were approximately 47% of mortgage backed securities as of June 30, 2016 and 54% as of December 31, 2015 based on fair value. The Company’s investment portfolio in tax-exempt and taxable municipal securities includes issuances by a wide number of municipal authorities across the U.S. and its territories. Under the Company's investment guidelines, securities rated lower than A-/A3 by S&P or Moody’s are typically not purchased for the Company’s portfolio unless acquired for loss mitigation or risk management strategies. The majority of the investment portfolio is managed by four outside managers. The Company has established detailed guidelines regarding credit quality, exposure to a particular sector and exposure to a particular obligor within a sector. The following tables summarize, for all fixed-maturity securities in an unrealized loss position, the aggregate fair value and gross unrealized loss by length of time the amounts have continuously been in an unrealized loss position. Fixed-Maturity Securities Gross Unrealized Loss by Length of Time As of June 30, 2016 Less than 12 months 12 months or more Total Fair Value Unrealized Loss Fair Unrealized Fair Unrealized (dollars in millions) Obligations of state and political subdivisions $ 25 $ 0 $ 10 $ (1 ) $ 35 $ (1 ) U.S. government and agencies 10 0 — — 10 0 Corporate securities 54 (5 ) 81 (33 ) 135 (38 ) Mortgage-backed securities: RMBS 47 (5 ) 115 (14 ) 162 (19 ) CMBS 7 0 — — 7 0 Asset-backed securities 543 (17 ) — — 543 (17 ) Foreign government securities 84 (9 ) 52 (9 ) 136 (18 ) Total $ 770 $ (36 ) $ 258 $ (57 ) $ 1,028 $ (93 ) Number of securities (1) 68 53 113 Number of securities with other-than-temporary impairment (1) 8 7 14 Fixed-Maturity Securities Gross Unrealized Loss by Length of Time As of December 31, 2015 Less than 12 months 12 months or more Total Fair Unrealized Fair Unrealized Fair Unrealized (dollars in millions) Obligations of state and political subdivisions $ 316 $ (10 ) $ 7 $ 0 $ 323 $ (10 ) U.S. government and agencies 77 0 — — 77 0 Corporate securities 381 (8 ) 95 (15 ) 476 (23 ) Mortgage-backed securities: RMBS 438 (8 ) 90 (14 ) 528 (22 ) CMBS 140 (2 ) 2 0 142 (2 ) Asset-backed securities 517 (10 ) — — 517 (10 ) Foreign government securities 97 (4 ) 82 (7 ) 179 (11 ) Total $ 1,966 $ (42 ) $ 276 $ (36 ) $ 2,242 $ (78 ) Number of securities (1) 335 71 396 Number of securities with other-than-temporary impairment 9 4 13 ___________________ (1) The number of securities does not add across because lots consisting of the same securities have been purchased at different times and appear in both categories above (i.e., less than 12 months and 12 months or more). If a security appears in both categories, it is counted only once in the total column. Of the securities in an unrealized loss position for 12 months or more as of June 30, 2016 , 26 securities had unrealized losses greater than 10% of book value. The total unrealized loss for these securities as of June 30, 2016 was $55 million . As of December 31, 2015, of the securities in an unrealized loss position for 12 months or more, nine securities had unrealized losses greater than 10% of book value with unrealized loss amount of $26 million . The Company has determined that the unrealized losses recorded as of June 30, 2016 and December 31, 2015 were yield related and not the result of other-than-temporary-impairment. The amortized cost and estimated fair value of available-for-sale fixed maturity securities by contractual maturity as of June 30, 2016 are shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Distribution of Fixed-Maturity Securities by Contractual Maturity As of June 30, 2016 Amortized Cost Estimated Fair Value (in millions) Due within one year $ 482 $ 484 Due after one year through five years 1,484 1,536 Due after five years through 10 years 1,926 2,066 Due after 10 years 3,967 4,273 Mortgage-backed securities: RMBS 1,037 1,062 CMBS 505 539 Total $ 9,401 $ 9,960 The investment portfolio contains securities and cash that are either held in trust for the benefit of third party reinsurers in accordance with statutory requirements, invested in a guaranteed investment contract for future claims payments, placed on deposit to fulfill state licensing requirements, or otherwise restricted in the amount of $300 million and $ 283 million as of June 30, 2016 and December 31, 2015 , respectively, based on fair value. The investment portfolio also contains securities that are held in trust by certain AGL subsidiaries for the benefit of other AGL subsidiaries in accordance with statutory and regulatory requirements in the amount of $1,561 million and $1,411 million as of June 30, 2016 and December 31, 2015 , respectively, based on fair value. The fair value of the Company’s pledged securities to secure its obligations under its CDS exposure totaled $216 million and $ 305 million as of June 30, 2016 and December 31, 2015 , respectively. No material investments of the Company were non-income producing for Six Months 2016 and Six Months 2015 , respectively. Internally Managed Portfolio The investment portfolio tables shown above include both assets managed externally and internally. In the table below, more detailed information is provided for the component of the total investment portfolio that is internally managed (excluding short-term investments). The internally managed portfolio, as defined below, represents approximately 13% and 13% of the investment portfolio, on a fair value basis as of June 30, 2016 and December 31, 2015 , respectively. The internally managed portfolio consists primarily of the Company's investments in securities for (i) loss mitigation purposes, (ii) other risk management purposes and (iii) where the Company believes a particular security presents an attractive investment opportunity. One of the Company's strategies for mitigating losses has been to purchase securities it has insured that have expected losses, at discounted prices (assets purchased for loss mitigation purposes). In addition, the Company holds other invested assets that were obtained or purchased as part of negotiated settlements with insured counterparties or under the terms of our financial guaranties (other risk management assets). Internally Managed Portfolio Carrying Value As of As of (in millions) Assets purchased for loss mitigation and other risk management purposes: Fixed-maturity securities, at fair value $ 1,208 $ 1,266 Other invested assets 113 114 Other 58 55 Total $ 1,379 $ 1,435

Insurance Company Regulatory Re

Insurance Company Regulatory Requirements	6 Months Ended
	Jun. 30, 2016
Insurance Company Regulatory Requirements [Abstract]
Insurance Company Regulatory Requirements	Insurance Company Regulatory Requirements Dividend Restrictions and Capital Requirements Under New York insurance law, AGM may only pay dividends out of "earned surplus," which is the portion of the company's surplus that represents the net earnings, gains or profits (after deduction of all losses) that have not been distributed to shareholders as dividends or transferred to stated capital or capital surplus, or applied to other purposes permitted by law, but does not include unrealized appreciation of assets. AGM may pay dividends without the prior approval of the New York Superintendent of Financial Services ("New York Superintendent") that, together with all dividends declared or distributed by it during the preceding 12 months, does not exceed the lesser of 10% of its policyholders' surplus (as of its last annual or quarterly statement filed with the New York Superintendent) or 100% of its adjusted net investment income during that period. The maximum amount available during 2016 for AGM to distribute as dividends without regulatory approval is estimated to be approximately $244 million , of which approximately $65 million is estimated to be available for distribution in the third quarter of 2016. Under Maryland's insurance law, AGC may, with prior notice to the Maryland Insurance Commissioner, pay an ordinary dividend that, together with all dividends paid in the prior 12 months, does not exceed the lesser of 10% of its policyholders' surplus (as of the prior December 31) or 100% of its adjusted net investment income during that period. The maximum amount available during 2016 for AGC to distribute as ordinary dividends is approximately $79 million , of which approximately $16 million is available for distribution in the third quarter of 2016. MAC is a New York domiciled insurance company subject to the same dividend limitations described above for AGM. The Company does not currently anticipate that MAC will distribute any dividends. On June 30, 2016, MAC obtained approval from the New York State Department of Financial Services to repay its $300 million surplus note to Municipal Assurance Holdings Inc. ("MAC Holdings") and its $100 million surplus note (plus accrued interest) to AGM. Accordingly, on June 30, 2016, MAC transferred cash and/or marketable securities to (i) MAC Holdings in an aggregate amount equal to $300 million , and (ii) AGM in an aggregate amount of $102.5 million . MAC Holdings, upon receipt of such $300 million from MAC, distributed cash and/or marketable securities in an aggregate amount of $300 million to its shareholders, AGM and AGC, in proportion to their respective 60.7% and 39.3% ownership interests such that AGM received $182.1 million and AGC received $117.9 million . For AG Re, any distribution (including repurchase of shares) of any share capital, contributed surplus or other statutory capital that would reduce its total statutory capital by 15% or more of its total statutory capital as set out in its previous year's financial statements requires the prior approval of the Bermuda Monetary Authority ("Authority"). Separately, dividends are paid out of an insurer's statutory surplus and cannot exceed that surplus. Further, annual dividends cannot exceed 25% of total statutory capital and surplus as set out in its previous year's financial statements, which is $246 million without AG Re certifying to the Authority that it will continue to meet required margins. Based on the foregoing limitations, in 2016 AG Re has the capacity to (i) make capital distributions in an aggregate amount up to $127 million without the prior approval of the Authority and (ii) declare and pay dividends in an aggregate amount up to the limit of its outstanding statutory surplus, which was approximately $223 million as of June 30, 2016 . Such dividend capacity is further limited by the actual amount of AG Re’s unencumbered assets, which amount changes from time to time due in part to collateral posting requirements. As of June 30, 2016 , AG Re had unencumbered assets of approximately $580 million . U.K. company law prohibits each of AGE and AGUK from declaring a dividend to its shareholders unless it has “profits available for distribution.” The determination of whether a company has profits available for distribution is based on its accumulated realized profits less its accumulated realized losses. While the U.K. insurance regulatory laws impose no statutory restrictions on a general insurer's ability to declare a dividend, the Prudential Regulation Authority's capital requirements may in practice act as a restriction on dividends. The Company does not expect AGE or AGUK to distribute any dividends at this time. Dividends and Surplus Notes By Insurance Company Subsidiaries Second Quarter Six Months 2016 2015 2016 2015 (in millions) Dividends paid by AGC to AGUS $ 23 $ 15 $ 23 $ 35 Dividends paid by AGM to AGMH 32 40 127 106 Dividends paid by AG Re to AGL 25 35 50 85 Repayment of surplus note by AGM to AGMH — — — 25 Repayment of surplus note by MAC to AGM 100 — 100 — Repayment of surplus note by MAC to MAC Holdings (1) 300 — 300 — ____________________ (1) MAC Holdings returned $300 million to AGM and AGC, in proportion to their ownership percentages, in Second Quarter 2016.

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Overview AGL, and its "Bermuda Subsidiaries," which consist of AG Re, AGRO, and Cedar Personnel Ltd., are not subject to any income, withholding or capital gains taxes under current Bermuda law. The Company has received an assurance from the Minister of Finance in Bermuda that, in the event of any taxes being imposed, AGL and its Bermuda Subsidiaries will be exempt from taxation in Bermuda until March 31, 2035. AGL's U.S. and U.K. subsidiaries are subject to income taxes imposed by U.S. and U.K. authorities, respectively, and file applicable tax returns. In addition, AGRO, a Bermuda domiciled company and AGE, a U.K. domiciled company, have elected under Section 953(d) of the U.S. Internal Revenue Code to be taxed as a U.S. domestic corporation. In November 2013, AGL became tax resident in the U.K. although it will remain a Bermuda-based company and its administrative and head office functions will continue to be carried on in Bermuda. As a U.K. tax resident company, AGL is required to file a corporation tax return with Her Majesty’s Revenue & Customs (“HMRC”). AGL is subject to U.K. corporation tax in respect of its worldwide profits (both income and capital gains), subject to any applicable exemptions. The main rate of corporation tax remains at 20% for 2016. AGL has also registered in the U.K. to report its Value Added Tax (“VAT”) liability. The current rate of VAT is 20% . Assured Guaranty expects that the dividends AGL receives from its direct subsidiaries will be exempt from U.K. corporation tax due to the exemption in section 931D of the U.K. Corporation Tax Act 2009. In addition, any dividends paid by AGL to its shareholders should not be subject to any withholding tax in the U.K. The U.K. government implemented a tax regime for “controlled foreign companies” (“CFC regime”) effective January 1, 2013. Assured Guaranty does not expect any profits of non-U.K. resident members of the group to be taxed under the CFC regime and has obtained a clearance from HMRC confirming this on the basis of current facts. AGUS files a consolidated federal income tax return with AGC, AG Financial Products Inc. ("AGFP"), AG Analytics Inc., AGMH, beginning May 12, 2012 MAC and MAC Holdings, and beginning April 1, 2015 Radian Asset and Van American (“AGUS consolidated tax group”). Assured Guaranty Overseas US Holdings Inc. and its subsidiaries AGRO and AG Intermediary Inc., file their own consolidated federal income tax return. Provision for Income Taxes The Company's provision for income taxes for interim financial periods is not based on an estimated annual effective rate due, for example, to the variability in fair value of its credit derivatives, which prevents the Company from projecting a reliable estimated annual effective tax rate and pretax income for the full year 2016. A discrete calculation of the provision is calculated for each interim period. The effective tax rates reflect the proportion of income recognized by each of the Company’s operating subsidiaries, with U.S. subsidiaries taxed at the U.S. marginal corporate income tax rate of 35% , U.K. subsidiaries taxed at the U.K. marginal corporate tax rate of 20% unless subject to U.S. tax by election or as a U.S. controlled foreign corporation, and no taxes for the Company’s Bermuda subsidiaries unless subject to U.S. tax by election or as a U.S. controlled foreign corporation. For periods subsequent to April 1, 2015, the U.K. corporation tax rate has been reduced to 20% and will remain unchanged until April 1, 2017. For the period April 1, 2014 to April 1, 2015 the U.K. corporation tax rate was 21% resulting in a blended tax rate of 20.25% in 2015. The Company’s overall effective tax rate fluctuates based on the distribution of income across jurisdictions. A reconciliation of the difference between the provision for income taxes and the expected tax provision at statutory rates in taxable jurisdictions is presented below. Effective Tax Rate Reconciliation Second Quarter Six Months 2016 2015 2016 2015 (in millions) Expected tax provision (benefit) at statutory rates in taxable jurisdictions $ 66 $ 143 $ 84 $ 220 Tax-exempt interest (13 ) (13 ) (26 ) (27 ) Gain on bargain purchase — (19 ) — (19 ) Change in liability for uncertain tax positions 1 1 2 2 Other 1 0 1 1 Total provision (benefit) for income taxes $ 55 $ 112 $ 61 $ 177 Effective tax rate 26.9 % 27.5 % 22.8 % 26.2 % The expected tax provision at statutory rates in taxable jurisdictions is calculated as the sum of pretax income in each jurisdiction multiplied by the statutory tax rate of the jurisdiction by which it will be taxed. Pretax income of the Company’s subsidiaries which are not U.S. or U.K. domiciled but are subject to U.S. or U.K. tax by election, establishment of tax residency or as controlled foreign corporations, are included at the U.S. or U.K. statutory tax rate. Where there is a pretax loss in one jurisdiction and pretax income in another, the total combined expected tax rate may be higher or lower than any of the individual statutory rates. The following table presents pretax income and revenue by jurisdiction. Pretax Income (Loss) by Tax Jurisdiction Second Quarter Six Months 2016 2015 2016 2015 (in millions) United States $ 194 $ 414 $ 249 $ 637 Bermuda 15 5 32 55 U.K. (8 ) (10 ) (15 ) (17 ) Total $ 201 $ 409 $ 266 $ 675 Revenue by Tax Jurisdiction Second Quarter Six Months 2016 2015 2016 2015 (in millions) United States $ 337 $ 618 $ 542 $ 918 Bermuda 59 78 101 151 U.K. 0 (1 ) (2 ) (5 ) Total $ 396 $ 695 $ 641 $ 1,064 Pretax income by jurisdiction may be disproportionate to revenue by jurisdiction to the extent that insurance losses incurred are disproportionate. Valuation Allowance As part of the Radian Asset Acquisition, the Company acquired $11 million of foreign tax credits (“FTC”) which will expire between 2018 and 2020. After reviewing positive and negative evidence, the Company came to the conclusion that it is more likely than not that the FTC will not be utilized, and therefore recorded a valuation allowance with respect to this tax attribute. The Company came to the conclusion that it is more likely than not that the remaining net deferred tax asset will be fully realized after weighing all positive and negative evidence available as required under GAAP. The positive evidence that was considered included the cumulative income the Company has earned over the last three years, and the significant unearned premium income to be included in taxable income. The positive evidence outweighs any negative evidence that exists. As such, the Company believes that no valuation allowance is necessary in connection with this deferred tax asset. The Company will continue to analyze the need for a valuation allowance on a quarterly basis. Audits AGUS has open tax years with the U.S. Internal Revenue Service (“IRS”) for 2009 forward and is currently under audit for the 2009-2012 tax years. Assured Guaranty Oversees US Holdings Inc. has open tax years of 2012 forward. The Company's U.K. subsidiaries are not currently under examination and have open tax years of 2014 forward. Uncertain Tax Positions The Company's policy is to recognize interest and penalties related to uncertain tax positions in income tax expense and has accrued $1 million for Six Months 2016 and $1 million for 2015. As of June 30, 2016 and December 31, 2015 , the Company has accrued $6.2 million and $5.4 million of interest, respectively. The total amount of unrecognized tax benefits as of June 30, 2016 and December 31, 2015 , that would affect the effective tax rate, if recognized, was $47 million and $45 million , respectively.

Reinsurance and Other Monoline

Reinsurance and Other Monoline Exposures	6 Months Ended
	Jun. 30, 2016
Insurance [Abstract]
Reinsurance and Other Monoline Exposures	Reinsurance and Other Monoline Exposures The Company assumes exposure on insured obligations (“Assumed Business”) and may cede portions of its exposure on obligations it has insured (“Ceded Business”) in exchange for premiums, net of ceding commissions. The Company historically entered into ceded reinsurance contracts in order to obtain greater business diversification and reduce the net potential loss from large risks. Assumed and Ceded Business The Company assumes business from other monoline financial guaranty companies. Under these relationships, the Company assumes a portion of the ceding company’s insured risk in exchange for a premium. The Company may be exposed to risk in this portfolio in that the Company may be required to pay losses without a corresponding premium in circumstances where the ceding company is experiencing financial distress and is unable to pay premiums. The Company’s facultative and treaty agreements are generally subject to termination at the option of the ceding company: • if the Company fails to meet certain financial and regulatory criteria and to maintain a specified minimum financial strength rating, or • upon certain changes of control of the Company. Upon termination under these conditions, the Company may be required (under some of its reinsurance agreements) to return to the ceding company unearned premiums (net of ceding commissions) and loss reserves calculated on a statutory basis of accounting, attributable to reinsurance assumed pursuant to such agreements after which the Company would be released from liability with respect to the Assumed Business. Upon the occurrence of the conditions set forth in the first bullet above, whether or not an agreement is terminated, the Company may be required to obtain a letter of credit or alternative form of security to collateralize its obligation to perform under such agreement or it may be obligated to increase the level of ceding commission paid. The downgrade of the financial strength ratings of AG Re or of AGC gives certain ceding companies the right to recapture business they had ceded to AG Re and AGC, which would lead to a reduction in the Company's unearned premium reserve and related earnings on such reserve. With respect to a significant portion of the Company's in-force financial guaranty assumed business, based on AG Re's and AGC's current ratings and subject to the terms of each reinsurance agreement, the third party ceding company may have the right to recapture business it had ceded to AG Re and/or AGC, and in connection therewith, to receive payment from AG Re or AGC of an amount equal to the statutory unearned premium (net of ceding commissions) and statutory loss reserves (if any) associated with that business, plus, in certain cases, an additional ceding commission. As of June 30, 2016 , if each third party insurer ceding business to AG Re and/or AGC had a right to recapture such business, and chose to exercise such right, the aggregate amounts that AG Re and AGC could be required to pay to all such companies would be approximately $49 million and $32 million , respectively. The Company has Ceded Business to non-affiliated companies to limit its exposure to risk. Under these relationships, the Company ceded a portion of its insured risk in exchange for a premium paid to the reinsurer. The Company remains primarily liable for all risks it directly underwrites and is required to pay all gross claims. It then seeks reimbursement from the reinsurer for its proportionate share of claims. The Company may be exposed to risk for this exposure if it were required to pay the gross claims and not be able to collect ceded claims from an assuming company experiencing financial distress. A number of the financial guaranty insurers to which the Company has ceded par have experienced financial distress and been downgraded by the rating agencies as a result. In addition, state insurance regulators have intervened with respect to some of these insurers. The Company’s ceded contracts generally allow the Company to recapture Ceded Business after certain triggering events, such as reinsurer downgrades. In Six Months 2015, the Company entered into a commutation agreement to reassume previously ceded U.S. public finance business. For such reassumption, the Company received the statutory unearned premium outstanding as of the commutation date plus a commutation premium. The following table presents the components of premiums and losses reported in the consolidated statement of operations and the contribution of the Company's Assumed and Ceded Businesses. Effect of Reinsurance on Statement of Operations Second Quarter Six Months 2016 2015 2016 2015 (in millions) Premiums Written: Direct $ 42 $ 23 $ 63 $ 52 Assumed (1) (6 ) (1 ) (8 ) 2 Ceded 0 2 (17 ) 2 Net $ 36 $ 24 $ 38 $ 56 Premiums Earned: Direct $ 220 $ 224 $ 410 $ 372 Assumed 5 12 13 22 Ceded (11 ) (17 ) (26 ) (33 ) Net $ 214 $ 219 $ 397 $ 361 Loss and LAE: Direct $ 101 $ 186 $ 210 $ 212 Assumed 11 19 (3 ) 12 Ceded (10 ) (17 ) (15 ) (18 ) Net $ 102 $ 188 $ 192 $ 206 ____________________ (1) Negative assumed premiums written were due to changes in expected debt service schedules. Other Monoline Exposures In addition to assumed and ceded reinsurance arrangements, the Company may also have exposure to some financial guaranty reinsurers (i.e., monolines) in other areas. Second-to-pay insured par outstanding represents transactions the Company has insured that were previously insured by other monolines. The Company underwrites such transactions based on the underlying insured obligation without regard to the primary insurer. Another area of exposure is in the investment portfolio where the Company holds fixed-maturity securities that are wrapped by monolines and whose value may change based on the rating of the monoline. As of June 30, 2016 , based on fair value, the Company had fixed-maturity securities in its investment portfolio consisting of $155 million insured by National Public Finance Guarantee Corporation ("National"), $139 million insured by Ambac and $8 million insured by other guarantors. In addition, the Company acquired bonds for loss mitigation or other risk management purposes. As of June 30, 2016 these bonds had a fair value of $243 million insured by MBIA Insurance Corp. and $127 million insured by FGIC UK Limited. Monoline and Reinsurer Exposure by Company Ratings at Par Outstanding (1) August 1, 2016 As of June 30, 2016 Reinsurer Moody’s Reinsurer Rating S&P Reinsurer Rating Ceded Par Outstanding Second-to- Pay Insured Par Outstanding Assumed Par Outstanding (dollars in millions) American Overseas Reinsurance Company Limited (2) WR (3) WR $ 4,511 $ — $ 30 Tokio Marine & Nichido Fire Insurance Co., Ltd. (2) Aa3 (4) A+ (4) 3,887 — — Syncora (2) WR WR 2,269 1,184 662 Mitsui Sumitomo Insurance Co. Ltd. (2) A1 A+ (4) 1,513 — — ACA Financial Guaranty Corp. NR (5) WR 657 33 — Ambac WR WR 115 3,541 8,862 National (6) A3 AA- — 4,967 4,960 MBIA (7) (7) — 1,357 414 FGIC (8) (8) — 1,341 593 Ambac Assurance Corp. Segregated Account NR NR — 81 645 CIFG (9) WR WR — 43 2,488 Other (2) Various Various 72 715 126 Total $ 13,024 $ 13,262 $ 18,780 ____________________ (1) Includes par related to insured credit derivatives. (2) The total collateral posted by all non-affiliated reinsurers required or agreeing to post collateral as of June 30, 2016 was approximately $438 million . (3) Represents “Withdrawn Rating.” (4) The Company benefits from trust arrangements that satisfy the triple-A credit requirement of S&P and/or Moody’s. (5) Represents “Not Rated.” (6) Rated AA+ by KBRA. (7) MBIA includes subsidiaries MBIA Insurance Corp. rated CCC by S&P and Caa1 by Moody's and MBIA U.K. Insurance Ltd. rated BB by S&P and Ba2 by Moody’s. (8) FGIC includes subsidiaries Financial Guaranty Insurance Company and FGIC UK Limited both of which had their ratings withdrawn by rating agencies. (9) On July 1, 2016, AGC acquired all of the issued and outstanding capital stock of CIFG Holding Inc., the parent of financial guaranty insurer CIFG. On July 5, 2016, CIFG merged with and into AGC, with AGC as the surviving company. See Note 2, Acquisitions, for additional information. Amounts Due (To) From Reinsurers As of June 30, 2016 Assumed Premium, net of Commissions Ceded Premium, net of Commissions Assumed Ceded (in millions) American Overseas Reinsurance Company Limited $ — $ (5 ) $ — $ 29 Tokio Marine & Nichido Fire Insurance Co., Ltd. — (11 ) — 46 Syncora 13 (20 ) — 8 Mitsui Sumitomo Insurance Co. Ltd. — (2 ) — 19 Ambac 36 — (3 ) — National 6 — (6 ) — MBIA 4 — (9 ) — FGIC 4 — (17 ) — Ambac Assurance Corp. Segregated Account 7 — (45 ) — CIFG (1) — — (71 ) — Other — (12 ) — 0 Total $ 70 $ (50 ) $ (151 ) $ 102 ____________________ (1) On July 1, 2016, AGC acquired all of the issued and outstanding capital stock of CIFG Holding Inc., the parent of financial guaranty insurer CIFG. On July 5, 2016, CIFG merged with and into AGC, with AGC as the surviving company. See Note 2, Acquisitions, for additional information. Excess of Loss Reinsurance Facility AGC, AGM and MAC entered into a $360 million aggregate excess of loss reinsurance facility with a number of reinsurers, effective as of January 1, 2016. This facility replaces a similar $450 million aggregate excess of loss reinsurance facility that AGC, AGM and MAC had entered into effective January 1, 2014 and which terminated on December 31, 2015. The new facility covers losses occurring either from January 1, 2016 through December 31, 2023, or January 1, 2017 through December 31, 2024, at the option of AGC, AGM and MAC. It terminates on January 1, 2018, unless AGC, AGM and MAC choose to extend it. The new facility covers certain U.S. public finance credits insured or reinsured by AGC, AGM and MAC as of September 30, 2015, excluding credits that were rated non-investment grade as of December 31, 2015 by Moody’s or S&P or internally by AGC, AGM or MAC and is subject to certain per credit limits. Among the credits excluded are those associated with the Commonwealth of Puerto Rico and its related authorities and public corporations. The new facility attaches when AGC’s, AGM’s and MAC’s net losses (net of AGC’s and AGM's reinsurance (including from affiliates) and net of recoveries) exceed $1.25 billion in the aggregate. The new facility covers a portion of the next $400 million of losses, with the reinsurers assuming pro rata in the aggregate $360 million of the $400 million of losses and AGC, AGM and MAC jointly retaining the remaining $40 million . The reinsurers are required to be rated at least AA- or to post collateral sufficient to provide AGM, AGC and MAC with the same reinsurance credit as reinsurers rated AA-. AGM, AGC and MAC are obligated to pay the reinsurers their share of recoveries relating to losses during the coverage period in the covered portfolio. AGC, AGM and MAC paid approximately $9 million of premiums in 2016 for the term January 1, 2016 through December 31, 2016 and deposited approximately $9 million of securities into trust accounts for the benefit of the reinsurers to be used to pay the premium for January 1, 2017 through December 31, 2017. The main differences between the new facility and the prior facility that terminated on December 31, 2015 are the reinsurance attachment point ( $1.25 billion versus $1.5 billion ), the total reinsurance coverage ( $360 million part of $400 million versus $450 million part of $500 million ) and the annual premium ( $9 million versus $19 million ).

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Legal Proceedings Lawsuits arise in the ordinary course of the Company’s business. It is the opinion of the Company’s management, based upon the information available, that the expected outcome of litigation against the Company, individually or in the aggregate, will not have a material adverse effect on the Company’s financial position or liquidity, although an adverse resolution of litigation against the Company in a fiscal quarter or year could have a material adverse effect on the Company’s results of operations in a particular quarter or year. In addition, in the ordinary course of their respective businesses, certain of the Company's subsidiaries assert claims in legal proceedings against third parties to recover losses paid in prior periods or prevent losses in the future. For example, as described in the "Recovery Litigation" section of Note 5, Expected Loss to be Paid, in January 2016, the Company commenced an action for declaratory judgment and injunctive relief in the U.S. District Court for the District of Puerto Rico to invalidate executive orders issued by the Governor of Puerto Rico directing the retention or transfer of certain taxes and revenues pledged to secure the payment of certain bonds insured by the Company. In July 2016, the Company filed a motion and form of complaint in the U.S. District Court for the District of Puerto Rico seeking relief from the PROMESA stay in order to file a complaint to protect its interest in certain pledged PRHTA toll revenues. Also, in December 2008, the Company filed a claim in the Supreme Court of the State of New York against an investment manager in a transaction it insured alleging breach of fiduciary duty, gross negligence and breach of contract. The amounts, if any, the Company will recover in these and other proceedings to recover losses are uncertain, and recoveries, or failure to obtain recoveries, in any one or more of these proceedings during any quarter or year could be material to the Company’s results of operations in that particular quarter or year. The Company establishes accruals for litigation and regulatory matters to the extent it is probable that a loss has been incurred and the amount of that loss can be reasonably estimated. For litigation and regulatory matters where a loss may be reasonably possible, but not probable, or is probable but not reasonably estimable, no accrual is established, but if the matter is material, it is disclosed, including matters discussed below. The Company reviews relevant information with respect to its litigation and regulatory matters on a quarterly, and annual basis and updates its accruals, disclosures and estimates of reasonably possible loss based on such reviews. Litigation Proceedings Relating to the Company’s Financial Guaranty Business The Company receives subpoenas duces tecum and interrogatories from regulators from time to time. On November 28, 2011, Lehman Brothers International (Europe) (in administration) (“LBIE”) sued AGFP, an affiliate of AGC which in the past had provided credit protection to counterparties under credit default swaps. AGC acts as the credit support provider of AGFP under these credit default swaps. LBIE’s complaint, which was filed in the Supreme Court of the State of New York, alleged that AGFP improperly terminated nine credit derivative transactions between LBIE and AGFP and improperly calculated the termination payment in connection with the termination of 28 other credit derivative transactions between LBIE and AGFP. Following defaults by LBIE, AGFP properly terminated the transactions in question in compliance with the agreement between AGFP and LBIE, and calculated the termination payment properly. AGFP calculated that LBIE owes AGFP approximately $29 million in connection with the termination of the credit derivative transactions, whereas LBIE asserted in the complaint that AGFP owes LBIE a termination payment of approximately $1.4 billion . On February 3, 2012, AGFP filed a motion to dismiss certain of the counts in the complaint, and on March 15, 2013, the court granted AGFP's motion to dismiss the count relating to improper termination of the nine credit derivative transactions and denied AGFP's motion to dismiss the counts relating to the remaining transactions. On February 22, 2016, AGFP filed a motion for summary judgment on the remaining causes of action asserted by LBIE and on AGFP's counterclaims. Oral argument on AGFP's motion took place on July 21, 2016. LBIE's administrators disclosed in an April 10, 2015 report to LBIE’s unsecured creditors that LBIE's valuation expert has calculated LBIE's damages in aggregate for the 28 transactions to range between a minimum of approximately $200 million and a maximum of approximately $500 million , depending on what adjustment, if any, is made for AGFP's credit risk and excluding any applicable interest. Notwithstanding the range calculated by LBIE's valuation expert, the Company cannot reasonably estimate the possible loss, if any, that may arise from this lawsuit. On September 25, 2013, Wells Fargo Bank, N.A., as trust administrator of the MASTR Adjustable Rate Mortgages Trust 2007-3, filed an interpleader complaint in the U.S. District Court for the Southern District of New York against AGM, among others, relating to the right of AGM to be reimbursed from certain cashflows for principal claims paid in respect of insured certificates. The Company estimates that an adverse outcome to the interpleader proceeding could increase losses on the transaction by approximately $10 - $20 million , net of expected settlement payments and reinsurance in force. Proceedings Resolved Since December 31, 2015 On May 28, 2014, Houston Casualty Company Europe, Seguros y Reseguros, S.A. (“HCCE”) notified Radian Asset that it was demanding arbitration against Radian Asset in connection with housing cooperative losses presented to Radian Asset by HCCE under several years of quota-share surety reinsurance contracts. Through November 30, 2015, HCCE had presented AGC, as successor to Radian Asset, with approximately €15 million in claims. In January 2016, Assured Guaranty and HCCE settled all the claims related to the Spanish housing cooperative losses. Proceedings Related to AGMH’s Former Financial Products Business The following is a description of legal proceedings involving AGMH’s former Financial Products Business. Although the Company did not acquire AGMH’s former Financial Products Business, which included AGMH’s former GIC business, medium term notes business and portions of the leveraged lease businesses, certain legal proceedings relating to those businesses were against entities that the Company did acquire. While Dexia SA and Dexia Crédit Local S.A. (together, "Dexia") have paid all expenses and settlement amounts due to date as a result of the proceedings described below, such indemnification might not be sufficient to fully hold the Company harmless against any injunctive relief or civil or criminal sanction that is imposed against AGMH or its subsidiaries as a result of any potential newly asserted claims related to these matters. Governmental Investigations into Former Financial Products Business AGMH and/or AGM received subpoenas duces tecum and interrogatories or civil investigative demands from the Attorneys General of the States of Connecticut, Florida, Illinois, Massachusetts, Missouri, New York, Texas and West Virginia relating to their investigations of alleged bid rigging of municipal GICs. In addition, AGMH received a subpoena from the Antitrust Division of the Department of Justice in November 2006 issued in connection with an ongoing criminal investigation of bid rigging of awards of municipal GICs and other municipal derivatives. AGMH responded to such requests when they were received several years ago. While it is possible AGMH may receive additional inquiries from these or other regulators, the Company is not currently aware that any governmental authority, including such Attorneys General or the Department of Justice, are actively pursuing or contemplating legal proceedings with respect to AGMH's former Financial Products Business. Lawsuits Relating to Former Financial Products Business From 2008 through 2010, complaints were brought on behalf of a purported class of state, local and municipal government entities alleging federal antitrust violations in the municipal derivatives industry, seeking damages and alleging, among other things, a conspiracy to fix the pricing of, and manipulate bids for, municipal derivatives, including GICs. These actions were consolidated before one judge in the Southern District of New York as MDL 1950. Following motions to dismiss, amended class action complaints were filed on behalf of a putative class of plaintiffs. The most recently amended, operative class action complaint does not list AGMH or its affiliates as defendants or co-conspirators. On July 8, 2016, the MDL 1950 Court entered an order approving settlement of the remaining class claims, resolving the putative class case. In addition, the Attorney General of the State of West Virginia filed a lawsuit that, as amended, named AGM and Assured Guaranty US Holdings as defendants and alleged a conspiracy to decrease the returns that West Virginia public entities earned on municipal derivative instruments. Also, approximately 19 California and New York government entities brought individual lawsuits that were not a part of the class action and that did not dismiss AGMH or its affiliates. All these cases were transferred to the Southern District of New York and consolidated with MDL 1950 for pretrial purposes. In June and July 2016, Dexia executed settlement agreements covering the action brought by the Attorney General of the State of West Virginia and the actions brought by the individual California and New York plaintiffs, and on July 1, 2016 and July 27, 2016, respectively, the MDL 1950 court dismissed with prejudice the claims against Assured Guaranty US Holdings and AGM in all such actions. Those settlements release all claims as to Assured Guaranty US Holdings, AGMH and AGM, as well as their parents, subsidiaries and affiliates.

Long-Term Debt and Credit Facil

Long-Term Debt and Credit Facilities	6 Months Ended
	Jun. 30, 2016
Debt Disclosure [Abstract]
Long-Term Debt and Credit Facilities	Long-Term Debt and Credit Facilities The principal and carrying values of the Company’s long-term debt are presented in the table below. Principal and Carrying Amounts of Debt As of June 30, 2016 As of December 31, 2015 Principal Carrying Value Principal Carrying Value (in millions) AGUS: 7% Senior Notes $ 200 $ 197 $ 200 $ 197 5% Senior Notes 500 495 500 495 Series A Enhanced Junior Subordinated Debentures 150 150 150 150 Total AGUS 850 842 850 842 AGMH: 6 7 / 8 % QUIBS 100 69 100 69 6.25% Notes 230 140 230 140 5.6% Notes 100 56 100 56 Junior Subordinated Debentures 300 184 300 180 Total AGMH 730 449 730 445 AGM: Notes Payable 11 12 12 13 Total AGM 11 12 12 13 Total $ 1,591 $ 1,303 $ 1,592 $ 1,300 Recourse Credit Facilities 2009 Strip Coverage Facility In connection with the Company's acquisition of AGMH and its subsidiaries from Dexia Holdings Inc., AGM agreed to retain the risks relating to the debt and strip policy portions of the leveraged lease business. In a leveraged lease transaction, a tax-exempt entity (such as a transit agency) transfers tax benefits to a tax-paying entity by transferring ownership of a depreciable asset, such as subway cars. The tax-exempt entity then leases the asset back from its new owner. If the lease is terminated early, the tax-exempt entity must make an early termination payment to the lessor. A portion of this early termination payment is funded from monies that were pre-funded and invested at the closing of the leveraged lease transaction (along with earnings on those invested funds). The tax-exempt entity is obligated to pay the remaining, unfunded portion of this early termination payment (known as the “strip coverage”) from its own sources. AGM issued financial guaranty insurance policies (known as “strip policies”) that guaranteed the payment of these unfunded strip coverage amounts to the lessor, in the event that a tax-exempt entity defaulted on its obligation to pay this portion of its early termination payment. AGM can then seek reimbursement of its strip policy payments from the tax-exempt entity, and can also sell the transferred depreciable asset and reimburse itself from the sale proceeds. Currently, all the leveraged lease transactions in which AGM acts as strip coverage provider are breaching a rating trigger related to AGM and are subject to early termination. However, early termination of a lease does not result in a draw on the AGM policy if the tax-exempt entity makes the required termination payment. If all the leases were to terminate early and the tax-exempt entities do not make the required early termination payments, then AGM would be exposed to possible liquidity claims on gross exposure of approximately $1.1 billion as of June 30, 2016 . To date, none of the leveraged lease transactions that involve AGM has experienced an early termination due to a lease default and a claim on the AGM policy. At June 30, 2016 , approximately $1.5 billion of cumulative strip par exposure had been terminated since 2008 on a consensual basis. The consensual terminations have resulted in no claims on AGM. On July 1, 2009, AGM and Dexia Crédit Local S.A., acting through its New York Branch (“Dexia Crédit Local (NY)”), entered into a credit facility (the “Strip Coverage Facility”). Under the Strip Coverage Facility, Dexia Crédit Local (NY) agreed to make loans to AGM to finance all draws made by lessors on AGM strip policies that were outstanding as of November 13, 2008, up to the commitment amount, which was $495 million at June 30, 2016. There have never been any borrowings under the Strip Coverage Facility, the amount of the leveraged leases covered by the Strip Coverage Facility has declined since July 1, 2009 and, as noted above, to date, none of the leveraged lease transactions in which AGM acts as the strip coverage provider has experienced an early termination due to a lease default. Consequently, and in view of the credit quality of the relevant tax-exempt entities and the cost of the Strip Coverage Facility, the Company determined that maintaining the Strip Coverage Facility was no longer warranted. On July 29, 2016, the parties terminated the facility. Intercompany Credit Facility and Intercompany Debt On October 25, 2013, AGL, as borrower, and AGUS, as lender, entered into a revolving credit facility pursuant to which AGL may, from time to time, borrow for general corporate purposes. Under the credit facility, AGUS committed to lend a principal amount not exceeding $225 million in the aggregate. Such commitment terminates on October 25, 2018 (the “loan termination date”). The unpaid principal amount of each loan will bear interest at a fixed rate equal to 100% of the then applicable Federal short-term or mid-term interest rate, as the case may be, as determined under Internal Revenue Code Sec. 1274(d), and interest on all loans will be computed for the actual number of days elapsed on the basis of a year consisting of 360 days. Accrued interest on all loans will be paid on the last day of each June and December, beginning on December 31, 2013, and at maturity. AGL must repay the then unpaid principal amounts of the loans by the third anniversary of the loan termination date. No amounts are currently outstanding under the credit facility. In addition, in 2012 AGUS borrowed $90 million from its affiliate AGRO to fund the acquisition of MAC. That loan remained outstanding as of June 30, 2016 . Committed Capital Securities On April 8, 2005, AGC entered into separate agreements (the “Put Agreements”) with four custodial trusts (each, a “Custodial Trust”) pursuant to which AGC may, at its option, cause each of the Custodial Trusts to purchase up to $50 million of perpetual preferred stock of AGC (the “AGC Preferred Stock”). The custodial trusts were created as a vehicle for providing capital support to AGC by allowing AGC to obtain immediate access to new capital at its sole discretion at any time through the exercise of the put option. If the put options were exercised, AGC would receive $200 million in return for the issuance of its own perpetual preferred stock, the proceeds of which may be used for any purpose, including the payment of claims. The put options have not been exercised through the date of this filing. Distributions on the AGC CCS are determined pursuant to an auction process. Beginning on April 7, 2008 this auction process failed, thereby increasing the annualized rate on the AGC CCS to one-month LIBOR plus 250 basis points. In June 2003, $200 million of “AGM CPS”, money market preferred trust securities, were issued by trusts created for the primary purpose of issuing the AGM CPS, investing the proceeds in high-quality commercial paper and selling put options to AGM, allowing AGM to issue the trusts non-cumulative redeemable perpetual preferred stock (the “AGM Preferred Stock”) of AGM in exchange for cash. There are four trusts, each with an initial aggregate face amount of $50 million . These trusts hold auctions every 28 days, at which time investors submit bid orders to purchase AGM CPS. If AGM were to exercise a put option, the applicable trust would transfer the portion of the proceeds attributable to principal received upon maturity of its assets, net of expenses, to AGM in exchange for AGM Preferred Stock. AGM pays a floating put premium to the trusts, which represents the difference between the commercial paper yield and the winning auction rate (plus all fees and expenses of the trust). If an auction does not attract sufficient clearing bids, however, the auction rate is subject to a maximum rate of one-month LIBOR plus 200 basis points for the next succeeding distribution period. Beginning in August 2007, the AGM CPS required the maximum rate for each of the relevant trusts. AGM continues to have the ability to exercise its put option and cause the related trusts to purchase AGM Preferred Stock. The trusts provide AGM access to new capital at its sole discretion through the exercise of the put options. As of June 30, 2016 the put option had not been exercised. See Note 7, Fair Value Measurement, –Other Assets–Committed Capital Securities, for a fair value measurement discussion.

Earnings Per Share

Earnings Per Share	6 Months Ended
	Jun. 30, 2016
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share Computation of Earnings Per Share Second Quarter Six Months 2016 2015 2016 2015 (in millions) Basic earnings per share ("EPS"): Net income (loss) attributable to AGL $ 146 $ 297 $ 205 $ 498 Less: Distributed and undistributed income (loss) available to nonvested shareholders 0 0 0 0 Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries, basic $ 146 $ 297 $ 205 $ 498 Basic shares 134.0 150.6 135.1 153.2 Basic EPS $ 1.09 $ 1.97 $ 1.52 $ 3.25 Diluted EPS: Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries, basic $ 146 $ 297 $ 205 $ 498 Plus: Re-allocation of undistributed income (loss) available to nonvested shareholders of AGL and subsidiaries 0 0 0 0 Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries, diluted $ 146 $ 297 $ 205 $ 498 Basic shares 134.0 150.6 135.1 153.2 Dilutive securities: Options and restricted stock awards 0.8 1.0 0.8 0.9 Diluted shares 134.8 151.6 135.9 154.1 Diluted EPS $ 1.09 $ 1.96 $ 1.51 $ 3.23 Potentially dilutive securities excluded from computation of EPS because of antidilutive effect 0.6 0.1 0.7 0.4

Shareholders' Equity

Shareholders' Equity	6 Months Ended
	Jun. 30, 2016
Equity [Abstract]
Shareholders' Equity	Shareholders' Equity Other Comprehensive Income The following tables present the changes in each component of AOCI and the effect of reclassifications out of AOCI on the respective line items in net income. Changes in Accumulated Other Comprehensive Income by Component Second Quarter 2016 Net Unrealized Gains (Losses) on Investments with no Other-Than-Temporary Impairment Net Unrealized Gains (Losses) on Investments with Other-Than-Temporary Impairment Cumulative Translation Adjustment Cash Flow Hedge Total Accumulated Other Comprehensive Income (in millions) Balance, March 31, 2016 $ 350 $ (21 ) $ (18 ) $ 8 $ 319 Other comprehensive income (loss) before reclassifications 84 (6 ) (8 ) — 70 Amounts reclassified from AOCI to: Net realized investment gains (losses) (13 ) 4 — — (9 ) Net investment income — — — — — Interest expense — — — (1 ) (1 ) Total before tax (13 ) 4 — (1 ) (10 ) Tax (provision) benefit 5 (1 ) — 0 4 Total amount reclassified from AOCI, net of tax (8 ) 3 — (1 ) (6 ) Net current period other comprehensive income (loss) 76 (3 ) (8 ) (1 ) 64 Balance, June 30, 2016 $ 426 $ (24 ) $ (26 ) $ 7 $ 383 Changes in Accumulated Other Comprehensive Income by Component Second Quarter 2015 Net Unrealized Gains (Losses) on Investments with no Other-Than-Temporary Impairment Net Unrealized Gains (Losses) on Investments with Other-Than-Temporary Impairment Cumulative Translation Adjustment Cash Flow Hedge Total Accumulated Other Comprehensive Income (in millions) Balance, March 31, 2015 $ 372 $ 5 $ (15 ) $ 8 $ 370 Other comprehensive income (loss) before reclassifications (136 ) (6 ) 6 — (136 ) Amounts reclassified from AOCI to: Net realized investment gains (losses) 1 8 — — 9 Interest expense — — — 0 0 Total before tax 1 8 — 0 9 Tax (provision) benefit (1 ) (3 ) — 0 (4 ) Total amount reclassified from AOCI, net of tax 0 5 — 0 5 Net current period other comprehensive income (loss) (136 ) (1 ) 6 0 (131 ) Balance, June 30, 2015 $ 236 $ 4 $ (9 ) $ 8 $ 239 Changes in Accumulated Other Comprehensive Income by Component Six Months 2016 Net Unrealized Gains (Losses) on Investments with no Other-Than-Temporary Impairment Net Unrealized Gains (Losses) on Investments with Other-Than-Temporary Impairment Cumulative Translation Adjustment Cash Flow Hedge Total Accumulated Other Comprehensive Income (in millions) Balance, December 31, 2015 $ 260 $ (15 ) $ (16 ) $ 8 $ 237 Other comprehensive income (loss) before reclassifications 179 (23 ) (10 ) — 146 Amounts reclassified from AOCI to: Net realized investment gains (losses) (17 ) 21 — — 4 Net investment income (3 ) — — — (3 ) Interest expense — — — (1 ) (1 ) Total before tax (20 ) 21 — (1 ) 0 Tax (provision) benefit 7 (7 ) — 0 0 Total amount reclassified from AOCI, net of tax (13 ) 14 — (1 ) 0 Net current period other comprehensive income (loss) 166 (9 ) (10 ) (1 ) 146 Balance, June 30, 2016 $ 426 $ (24 ) $ (26 ) $ 7 $ 383 Changes in Accumulated Other Comprehensive Income by Component Six Months 2015 Net Unrealized Gains (Losses) on Investments with no Other-Than-Temporary Impairment Net Unrealized Gains (Losses) on Investments with Other-Than-Temporary Impairment Cumulative Translation Adjustment Cash Flow Hedge Total Accumulated Other Comprehensive Income (in millions) Balance, December 31, 2014 $ 367 $ 4 $ (10 ) $ 9 $ 370 Other comprehensive income (loss) before reclassifications (118 ) (8 ) 1 — (125 ) Amounts reclassified from AOCI to: Net realized investment gains (losses) (19 ) 12 — — (7 ) Interest expense — — — (1 ) (1 ) Total before tax (19 ) 12 — (1 ) (8 ) Tax (provision) benefit 6 (4 ) — 0 2 Total amount reclassified from AOCI, net of tax (13 ) 8 — (1 ) (6 ) Net current period other comprehensive income (loss) (131 ) 0 1 (1 ) (131 ) Balance, June 30, 2015 $ 236 $ 4 $ (9 ) $ 8 $ 239 Share Repurchase The following table presents share repurchases since January 2013. Share Repurchases Period Number of Shares Repurchased Total Payments(in millions) Average Price Paid Per Share 2013 12,512,759 $ 264 $ 21.12 2014 24,413,781 590 24.17 2015 (January 1 - March 31) 5,860,291 152 25.87 2015 (April 1 - June 30) 4,737,388 133 28.13 2015 (July 1 - September 30) 5,362,103 135 25.17 2015 (October 1 - December 31) 5,035,637 135 26.81 Total 2015 20,995,419 555 26.43 2016 (January 1 - March 31) 3,038,928 75 24.69 2016 (April 1 - June 30) 2,331,474 60 25.73 Total 2016 (through June 30) 5,370,402 135 25.14 2016 (July 1 - through August 3, 2016) 772,635 20 25.89 Total 2016 6,143,037 155 25.24 Cumulative repurchases since the beginning of 2013 64,064,996 $ 1,564 $ 24.42 On February 24, 2016, the Board of Directors approved a $250 million share repurchase authorization. The Company expects to repurchase shares from time to time in the open market or in privately negotiated transactions. The timing, form and amount of the share repurchases under the program are at the discretion of management and will depend on a variety of factors, including funds available at the parent company, market conditions, the Company's capital position, legal requirements and other factors. The repurchase program may be modified, extended or terminated by the Board of Directors at any time. It does not have an expiration date. As of June 30, 2016 , the Company's remaining share repurchase authorization was $170 million , and as of August 3, 2016, it was approximately $150 million .

Subsidiary Information

Subsidiary Information	6 Months Ended
	Jun. 30, 2016
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Subsidiary Information	Subsidiary Information The following tables present the condensed consolidating financial information for AGUS and AGMH, 100%-owned subsidiaries of AGL, which have issued publicly traded debt securities (see Note 15, Long Term Debt and Credit Facilities). The information for AGL, AGUS and AGMH presents its subsidiaries on the equity method of accounting. CONDENSED CONSOLIDATING BALANCE SHEET AS OF JUNE 30, 2016 (in millions) Assured Guaranty Ltd. (Parent) AGUS (Issuer) AGMH (Issuer) Other Entities Consolidating Adjustments Assured Guaranty Ltd. (Consolidated) ASSETS Total investment portfolio and cash $ 42 $ 85 $ 20 $ 11,113 $ (355 ) $ 10,905 Investment in subsidiaries 6,173 5,705 4,167 284 (16,329 ) — Premiums receivable, net of commissions payable — — — 748 (125 ) 623 Ceded unearned premium reserve — — — 1,189 (961 ) 228 Deferred acquisition costs — — — 167 (57 ) 110 Reinsurance recoverable on unpaid losses — — — 532 (450 ) 82 Credit derivative assets — — — 144 (108 ) 36 Deferred tax asset, net — 29 — 335 (129 ) 235 Intercompany receivable — — — 90 (90 ) — Financial guaranty variable interest entities’ assets, at fair value — — — 814 — 814 Funds restricted for CIFG acquisition — — — 451 — 451 Other 39 63 35 756 (285 ) 608 TOTAL ASSETS $ 6,254 $ 5,882 $ 4,222 $ 16,623 $ (18,889 ) $ 14,092 LIABILITIES AND SHAREHOLDERS’ EQUITY Unearned premium reserves $ — $ — $ — $ 4,675 $ (1,058 ) $ 3,617 Loss and LAE reserve — — — 1,790 (522 ) 1,268 Long-term debt — 842 449 12 — 1,303 Intercompany payable — 90 — 300 (390 ) — Credit derivative liabilities — — — 540 (108 ) 432 Deferred tax liabilities, net — — 90 — (90 ) — Financial guaranty variable interest entities’ liabilities, at fair value — — — 905 — 905 Other 4 15 14 692 (408 ) 317 TOTAL LIABILITIES 4 947 553 8,914 (2,576 ) 7,842 TOTAL SHAREHOLDERS’ EQUITY ATTRIBUTABLE TO ASSURED GUARANTY LTD. 6,250 4,935 3,669 7,425 (16,029 ) 6,250 Noncontrolling interest — — — 284 (284 ) — TOTAL SHAREHOLDERS' EQUITY 6,250 4,935 3,669 7,709 (16,313 ) 6,250 TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY $ 6,254 $ 5,882 $ 4,222 $ 16,623 $ (18,889 ) $ 14,092 CONDENSED CONSOLIDATING BALANCE SHEET AS OF DECEMBER 31, 2015 (in millions) Assured Guaranty Ltd. (Parent) AGUS (Issuer) AGMH (Issuer) Other Entities Consolidating Adjustments Assured Guaranty Ltd. (Consolidated) ASSETS Total investment portfolio and cash $ 10 $ 156 $ 22 $ 11,530 $ (360 ) $ 11,358 Investment in subsidiaries 5,961 5,569 4,081 377 (15,988 ) — Premiums receivable, net of commissions payable — — — 833 (140 ) 693 Ceded unearned premium reserve — — — 1,266 (1,034 ) 232 Deferred acquisition costs — — — 176 (62 ) 114 Reinsurance recoverable on unpaid losses — — — 467 (398 ) 69 Credit derivative assets — — — 207 (126 ) 81 Deferred tax asset, net — 52 — 357 (133 ) 276 Intercompany receivable — — — 90 (90 ) — Financial guaranty variable interest entities’ assets, at fair value — — — 1,261 — 1,261 Other 98 29 26 571 (264 ) 460 TOTAL ASSETS $ 6,069 $ 5,806 $ 4,129 $ 17,135 $ (18,595 ) $ 14,544 LIABILITIES AND SHAREHOLDERS’ EQUITY Unearned premium reserves $ — $ — $ — $ 5,143 $ (1,147 ) $ 3,996 Loss and LAE reserve — — — 1,537 (470 ) 1,067 Long-term debt — 842 445 13 — 1,300 Intercompany payable — 90 — 300 (390 ) — Credit derivative liabilities — — — 572 (126 ) 446 Deferred tax liabilities, net — — 91 — (91 ) — Financial guaranty variable interest entities’ liabilities, at fair value — — — 1,349 — 1,349 Other 6 82 15 622 (402 ) 323 TOTAL LIABILITIES 6 1,014 551 9,536 (2,626 ) 8,481 TOTAL SHAREHOLDERS’ EQUITY ATTRIBUTABLE TO ASSURED GUARANTY LTD. 6,063 4,792 3,578 7,222 (15,592 ) 6,063 Noncontrolling interest — — — 377 (377 ) — TOTAL SHAREHOLDERS’ EQUITY 6,063 4,792 3,578 7,599 (15,969 ) 6,063 TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY $ 6,069 $ 5,806 $ 4,129 $ 17,135 $ (18,595 ) $ 14,544 CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME FOR THE THREE MONTHS ENDED JUNE 30, 2016 (in millions) Assured Guaranty Ltd. (Parent) AGUS (Issuer) AGMH (Issuer) Other Entities Consolidating Adjustments Assured Guaranty Ltd. (Consolidated) REVENUES Net earned premiums $ — $ — $ — $ 222 $ (8 ) $ 214 Net investment income 0 0 0 98 0 98 Net realized investment gains (losses) 0 — 0 10 0 10 Net change in fair value of credit derivatives: Realized gains (losses) and other settlements — — — 24 0 24 Net unrealized gains (losses) — — — 39 — 39 Net change in fair value of credit derivatives — — — 63 0 63 Other 0 — — 11 0 11 TOTAL REVENUES 0 0 0 404 (8 ) 396 EXPENSES Loss and LAE — — — 104 (2 ) 102 Amortization of deferred acquisition costs — — — 7 (2 ) 5 Interest expense — 13 14 2 (4 ) 25 Other operating expenses 8 0 0 55 0 63 TOTAL EXPENSES 8 13 14 168 (8 ) 195 INCOME (LOSS) BEFORE INCOME TAXES AND EQUITY IN NET EARNINGS OF SUBSIDIARIES (8 ) (13 ) (14 ) 236 0 201 Total (provision) benefit for income taxes — 4 5 (65 ) 1 (55 ) Equity in net earnings of subsidiaries 154 140 113 14 (421 ) — NET INCOME (LOSS) $ 146 $ 131 $ 104 $ 185 $ (420 ) $ 146 Less: noncontrolling interest — — — 14 (14 ) — NET INCOME (LOSS) ATTRIBUTABLE TO ASSURED GUARANTY LTD. $ 146 $ 131 $ 104 $ 171 $ (406 ) $ 146 COMPREHENSIVE INCOME (LOSS) $ 210 $ 166 $ 125 $ 248 $ (539 ) $ 210 CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME FOR THE THREE MONTHS ENDED JUNE 30, 2015 (in millions) Assured Guaranty Ltd. (Parent) AGUS (Issuer) AGMH (Issuer) Other Entities Consolidating Adjustments Assured Guaranty Ltd. (Consolidated) REVENUES Net earned premiums $ — $ — $ — $ 226 $ (7 ) $ 219 Net investment income 0 0 0 101 (3 ) 98 Net realized investment gains (losses) 0 0 1 (10 ) 0 (9 ) Net change in fair value of credit derivatives: Realized gains (losses) and other settlements — — — 8 0 8 Net unrealized gains (losses) — — — 108 (26 ) 82 Net change in fair value of credit derivatives — — — 116 (26 ) 90 Bargain purchase gain and settlement of pre-existing relationships — — — 54 160 214 Other — — — 83 — 83 TOTAL REVENUES 0 0 1 570 124 695 EXPENSES Loss and LAE — — — 184 4 188 Amortization of deferred acquisition costs — — — 8 (2 ) 6 Interest expense — 13 14 3 (4 ) 26 Other operating expenses 9 1 0 57 (1 ) 66 TOTAL EXPENSES 9 14 14 252 (3 ) 286 INCOME (LOSS) BEFORE INCOME TAXES AND EQUITY IN NET EARNINGS OF SUBSIDIARIES (9 ) (14 ) (13 ) 318 127 409 Total (provision) benefit for income taxes — 4 4 (78 ) (42 ) (112 ) Equity in net earnings of subsidiaries 306 305 122 11 (744 ) — NET INCOME (LOSS) $ 297 $ 295 $ 113 $ 251 $ (659 ) $ 297 Less: noncontrolling interest — — — 11 (11 ) — NET INCOME (LOSS) ATTRIBUTABLE TO ASSURED GUARANTY LTD. $ 297 $ 295 $ 113 $ 240 $ (648 ) $ 297 COMPREHENSIVE INCOME (LOSS) $ 166 $ 210 $ 50 $ 122 $ (382 ) $ 166 CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME FOR THE SIX MONTHS ENDED JUNE 30, 2016 (in millions) Assured Guaranty Ltd. (Parent) AGUS (Issuer) AGMH (Issuer) Other Entities Consolidating Adjustments Assured Guaranty Ltd. (Consolidated) REVENUES Net earned premiums $ — $ — $ — $ 414 $ (17 ) $ 397 Net investment income 0 0 0 198 (1 ) 197 Net realized investment gains (losses) 0 — 0 (2 ) (1 ) (3 ) Net change in fair value of credit derivatives: Realized gains (losses) and other settlements — — — 32 0 32 Net unrealized gains (losses) — — — (29 ) — (29 ) Net change in fair value of credit derivatives — — — 3 0 3 Other 0 — — 47 0 47 TOTAL REVENUES 0 0 0 660 (19 ) 641 EXPENSES Loss and LAE — — — 197 (5 ) 192 Amortization of deferred acquisition costs — — — 14 (5 ) 9 Interest expense — 26 27 5 (7 ) 51 Other operating expenses 16 0 1 107 (1 ) 123 TOTAL EXPENSES 16 26 28 323 (18 ) 375 INCOME (LOSS) BEFORE INCOME TAXES AND EQUITY IN NET EARNINGS OF SUBSIDIARIES (16 ) (26 ) (28 ) 337 (1 ) 266 Total (provision) benefit for income taxes — 9 10 (81 ) 1 (61 ) Equity in net earnings of subsidiaries 221 190 190 23 (624 ) — NET INCOME (LOSS) $ 205 $ 173 $ 172 $ 279 $ (624 ) $ 205 Less: noncontrolling interest — — — 23 (23 ) — NET INCOME (LOSS) ATTRIBUTABLE TO ASSURED GUARANTY LTD. $ 205 $ 173 $ 172 $ 256 $ (601 ) $ 205 COMPREHENSIVE INCOME (LOSS) $ 351 $ 246 $ 217 $ 426 $ (889 ) $ 351 CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME FOR THE SIX MONTHS ENDED JUNE 30, 2015 (in millions) Assured Guaranty Ltd. (Parent) AGUS (Issuer) AGMH (Issuer) Other Entities Consolidating Adjustments Assured Guaranty Ltd. (Consolidated) REVENUES Net earned premiums $ — $ — $ — $ 366 $ (5 ) $ 361 Net investment income 0 0 0 205 (6 ) 199 Net realized investment gains (losses) 0 0 1 9 (3 ) 7 Net change in fair value of credit derivatives: Realized gains (losses) and other settlements — — — 29 0 29 Net unrealized gains (losses) — — — 211 (26 ) 185 Net change in fair value of credit derivatives — — — 240 (26 ) 214 Bargain purchase gain and settlement of pre-existing relationships — — — 54 160 214 Other — — — 69 — 69 TOTAL REVENUES 0 0 1 943 120 1,064 EXPENSES Loss and LAE — — — 202 4 206 Amortization of deferred acquisition costs — — — 14 (4 ) 10 Interest expense — 26 27 7 (9 ) 51 Other operating expenses 17 1 0 105 (1 ) 122 TOTAL EXPENSES 17 27 27 328 (10 ) 389 INCOME (LOSS) BEFORE INCOME TAXES AND EQUITY IN NET EARNINGS OF SUBSIDIARIES (17 ) (27 ) (26 ) 615 130 675 Total (provision) benefit for income taxes — 9 9 (150 ) (45 ) (177 ) Equity in net earnings of subsidiaries 515 468 214 20 (1,217 ) — NET INCOME (LOSS) $ 498 $ 450 $ 197 $ 485 $ (1,132 ) $ 498 Less: noncontrolling interest — — — 20 (20 ) — NET INCOME (LOSS) ATTRIBUTABLE TO ASSURED GUARANTY LTD. $ 498 $ 450 $ 197 $ 465 $ (1,112 ) $ 498 COMPREHENSIVE INCOME (LOSS) $ 367 $ 344 $ 130 $ 355 $ (829 ) $ 367 CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS FOR THE SIX MONTHS ENDED JUNE 30, 2016 (in millions) Assured Guaranty Ltd. (Parent) AGUS (Issuer) AGMH (Issuer) Other Entities Consolidating Adjustments Assured Guaranty Ltd. (Consolidated) Net cash flows provided by (used in) operating activities $ 202 $ 31 $ 101 $ 139 $ (520 ) $ (47 ) Cash flows from investing activities Fixed-maturity securities: Purchases (4 ) (32 ) — (474 ) — (510 ) Sales 4 — 10 725 — 739 Maturities — 21 — 624 — 645 Sales (purchases) of short-term investments, net (31 ) (12 ) (11 ) (136 ) — (190 ) Net proceeds from financial guaranty variable entities’ assets — — — 556 — 556 Investment in subsidiary — — — 4 (4 ) — Cash restricted for CIFG acquisition — — — (451 ) — (451 ) Other — — — (12 ) — (12 ) Net cash flows provided by (used in) investing activities (31 ) (23 ) (1 ) 836 (4 ) 777 Cash flows from financing activities Return of capital — — — (4 ) 4 — Dividends paid (35 ) (103 ) (103 ) (314 ) 520 (35 ) Repurchases of common stock (135 ) — — — — (135 ) Share activity under option and incentive plans 0 — — (1 ) — (1 ) Net paydowns of financial guaranty variable entities’ liabilities — — — (531 ) — (531 ) Payment of long-term debt — — — (1 ) — (1 ) Net cash flows provided by (used in) financing activities (170 ) (103 ) (103 ) (851 ) 524 (703 ) Effect of exchange rate changes — — — (3 ) — (3 ) Increase (decrease) in cash 1 (95 ) (3 ) 121 — 24 Cash at beginning of period 0 95 8 63 — 166 Cash at end of period $ 1 $ 0 $ 5 $ 184 $ — $ 190 CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS FOR THE SIX MONTHS ENDED JUNE 30, 2015 (in millions) Assured Guaranty Ltd. (Parent) AGUS (Issuer) AGMH (Issuer) Other Entities Consolidating Adjustments Assured Guaranty Ltd. (Consolidated) Net cash flows provided by (used in) operating activities $ 343 $ 138 $ 83 $ 170 $ (629 ) $ 105 Cash flows from investing activities Fixed-maturity securities: Purchases — (67 ) (6 ) (1,099 ) — (1,172 ) Sales — 159 27 1,195 — 1,381 Maturities — 6 — 405 — 411 Sales (purchases) of short-term investments, net (19 ) 39 (1 ) 363 — 382 Net proceeds from financial guaranty variable entities’ assets — — — 70 — 70 Investment in subsidiary — — 25 — (25 ) — Acquisition of Radian Asset, net of cash acquired — — — (800 ) — (800 ) Other — — — 27 — 27 Net cash flows provided by (used in) investing activities (19 ) 137 45 161 (25 ) 299 Cash flows from financing activities Return of capital — — — (25 ) 25 — Dividends paid (37 ) (275 ) (128 ) (226 ) 629 (37 ) Repurchases of common stock (285 ) — — — — (285 ) Share activity under option and incentive plans (2 ) — — — — (2 ) Net paydowns of financial guaranty variable entities’ liabilities — — — (78 ) — (78 ) Payment of long-term debt — — — (2 ) — (2 ) Net cash flows provided by (used in) financing activities (324 ) (275 ) (128 ) (331 ) 654 (404 ) Effect of exchange rate changes — — — 0 — 0 Increase (decrease) in cash — — — — — 0 Cash at beginning of period 0 0 4 71 — 75 Cash at end of period $ 0 $ 0 $ 4 $ 71 $ — $ 75

Business and Basis of Present28

Business and Basis of Presentation (Policies)	6 Months Ended
	Jun. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	The unaudited interim consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”) and, in the opinion of management, reflect all adjustments that are of a normal recurring nature, necessary for a fair statement of the financial condition, results of operations and cash flows of the Company and its consolidated variable interest entities (“VIEs”) for the periods presented. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of 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. These unaudited interim consolidated financial statements are as of June 30, 2016 and cover the three-month period ended June 30, 2016 (" Second Quarter 2016 "), the three-month period ended June 30, 2015 (" Second Quarter 2015 "), the six-month period ended June 30, 2016 (" Six Months 2016 ") and the six-month period ended June 30, 2015 (" Six Months 2015 "). Certain financial information that is normally included in annual financial statements prepared in accordance with GAAP, but is not required for interim reporting purposes, has been condensed or omitted. The year-end balance sheet data was derived from audited financial statements.
Consolidation	The unaudited interim consolidated financial statements include the accounts of AGL, its direct and indirect subsidiaries (collectively, the “Subsidiaries”), and its consolidated VIEs. Intercompany accounts and transactions between and among all consolidated entities have been eliminated.
Future Application of Accounting Standards	Future Application of Accounting Standards Credit Losses on Financial Instruments In June 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments . The amendments in this ASU are intended to improve financial reporting by requiring timelier recording of credit losses on loans and other financial instruments held by financial institutions and other organizations. The ASU requires the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. Financial institutions will use forward-looking information to better inform their credit loss estimates as a result of the ASU. While many of the loss estimation techniques applied today will still be permitted, the inputs to those techniques will change to reflect the full amount of expected credit losses. The ASU requires enhanced disclosures to help investors and other financial statement users to better understand significant estimates and judgments used in estimating credit losses, as well as credit quality and underwriting standards of an organization’s portfolio. In addition, the ASU amends the accounting for credit losses on available-for-sale securities and purchased financial assets with credit deterioration. The ASU makes targeted improvements to the existing “other than temporary” impairment model for certain available-for-sale debt securities to eliminate the concept of “other than temporary” from that model. Accordingly, the ASU states that an entity must use an allowance approach, must limit the allowance to an amount at which the security’s fair value is less than its amortized cost basis, may not consider the length of time fair value has been less than amortized cost, and may not consider recoveries in fair value after the balance sheet date when assessing whether a credit loss exists. For purchased financial assets with credit deterioration, the ASU requires an entity’s method for measuring credit losses to be consistent with its method for measuring expected losses for originated and purchased non-credit-deteriorated assets. The ASU is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. For most debt instruments, entities will be required to record a cumulative-effect adjustment to the statement of financial position as of the beginning of the first reporting period in which the guidance is adopted. The changes to the impairment model for available-for-sale securities and changes to purchased financial assets with credit deterioration are to be applied prospectively. For the Company, this would be as of January 1, 2020. Early adoption is permitted for fiscal years, and interim periods with those fiscal years, beginning after December 15, 2018. The Company is currently evaluating the effect on its Consolidated Financial Statements of adopting this ASU. Share-Based Payments In March 2016, the FASB issued ASU 2016-09, Compensation - Stock Compensation (Topic 718) - Improvements to Employee Share-Based Payment , which simplifies several aspects of the accounting for employee share-based payment transactions, including the accounting for income taxes, forfeitures, and statutory tax withholding requirements, as well as classification in the statement of cash flows. The new guidance will require all income tax effects of awards to be recognized in the income statement when the awards vest or are settled. It also will allow an employer to repurchase more of an employee’s shares than it can today for tax withholding purposes without triggering liability accounting and to make a policy election to account for forfeitures as they occur. The ASU is effective for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years, and early adoption is permitted. The Company is currently evaluating the effect on its Consolidated Financial Statements of adopting this ASU.
Fair Value of Financial Instruments	The Company carries a significant portion of its assets and liabilities at fair value. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (i.e., exit price). The price represents the price available in the principal market for the asset or liability. If there is no principal market, then the price is based on a hypothetical market that maximizes the value received for an asset or minimizes the amount paid for a liability (i.e., the most advantageous market). Fair value is based on quoted market prices, where available. If listed prices or quotes are not available, fair value is based on either internally developed models that primarily use, as inputs, market-based or independently sourced market parameters, including but not limited to yield curves, interest rates and debt prices or with the assistance of an independent third-party using a discounted cash flow approach and the third party’s proprietary pricing models. In addition to market information, models also incorporate transaction details, such as maturity of the instrument and contractual features designed to reduce the Company’s credit exposure, such as collateral rights as applicable. Valuation adjustments may be made to ensure that financial instruments are recorded at fair value. These adjustments include amounts to reflect counterparty credit quality, the Company’s creditworthiness and constraints on liquidity. As markets and products develop and the pricing for certain products becomes more or less transparent, the Company may refine its methodologies and assumptions. During Six Months 2016 , no changes were made to the Company’s valuation models that had or are expected to have, a material impact on the Company’s consolidated balance sheets or statements of operations and comprehensive income. The Company’s methods for calculating fair value produce a fair value that may not be indicative of net realizable value or reflective of future fair values. The use of different methodologies or assumptions to determine fair value of certain financial instruments could result in a different estimate of fair value at the reporting date. The categorization within the fair value hierarchy is determined 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 estimates of market assumptions. The fair value hierarchy prioritizes model inputs into three broad levels as follows, with Level 1 being the highest and Level 3 the lowest. An asset or liability’s categorization is based on the lowest level of significant input to its valuation. Level 1—Quoted prices for identical instruments in active markets. The Company generally defines an active market as a market in which trading occurs at significant volumes. Active markets generally are more liquid and have a lower bid-ask spread than an inactive market. Level 2—Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and observable inputs other than quoted prices, such as interest rates or yield curves and other inputs derived from or corroborated by observable market inputs. Level 3—Model derived valuations in which one or more significant inputs or significant value drivers are unobservable. Financial instruments are considered Level 3 when their values are determined using pricing models, discounted cash flow methodologies or similar techniques and at least one significant model assumption or input is unobservable. Level 3 financial instruments also include those for which the determination of fair value requires significant management judgment or estimation. Transfers between Levels 1, 2 and 3 are recognized at the end of the period when the transfer occurs. The Company reviews the classification between Levels 1, 2 and 3 quarterly to determine whether a transfer is necessary.
Consolidation, Variable Interest Entity	As part of the terms of its financial guaranty contracts, the Company obtains certain protective rights with respect to the VIE that are triggered by the occurrence of certain events, such as failure to be in compliance with a covenant due to poor deal performance or a deterioration in a servicer or collateral manager's financial condition. At deal inception, the Company typically is not deemed to control a VIE; however, once a trigger event occurs, the Company's control of the VIE typically increases. The Company continuously evaluates its power to direct the activities that most significantly impact the economic performance of VIEs that have debt obligations insured by the Company and, accordingly, where the Company is obligated to absorb VIE losses or receive benefits that could potentially be significant to the VIE. The Company obtains protective rights under its insurance contracts that give the Company additional controls over a VIE if there is either deterioration of deal performance or in the financial health of the deal servicer. The Company is deemed to be the control party for certain VIEs under GAAP, typically when its protective rights give it the power to both terminate and replace the deal servicer, which are characteristics specific to the Company's financial guaranty contracts. If the protective rights that could make the Company the control party have not been triggered, then the VIE is not consolidated. If the Company is deemed no longer to have those protective rights, the transaction is deconsolidated.

Outstanding Exposure (Tables)

Outstanding Exposure (Tables)	6 Months Ended
	Jun. 30, 2016
Schedule of Insured Financial Obligations [Line Items]
Debt Service Outstanding	The following table presents the gross and net debt service for all financial guaranty contracts. Financial Guaranty Debt Service Outstanding Gross Debt Service Outstanding Net Debt Service Outstanding June 30, December 31, June 30, December 31, (in millions) Public finance $ 473,991 $ 515,494 $ 455,056 $ 494,426 Structured finance 34,814 43,976 33,306 41,915 Total financial guaranty $ 508,805 $ 559,470 $ 488,362 $ 536,341
Financial Guaranty Portfolio by Internal Rating	Financial Guaranty Portfolio by Internal Rating As of June 30, 2016 Public Finance U.S. Public Finance Non-U.S. Structured Finance U.S Structured Finance Non-U.S Total Rating Category Net Par Outstanding % Net Par Outstanding % Net Par Outstanding % Net Par Outstanding % Net Par Outstanding % (dollars in millions) AAA $ 2,376 0.9 % $ 695 2.5 % $ 11,362 44.4 % $ 1,628 40.1 % $ 16,061 4.9 % AA 59,310 21.8 1,775 6.3 6,719 26.3 149 3.7 67,953 20.6 A 142,028 52.2 6,440 22.9 2,008 7.9 457 11.2 150,933 45.7 BBB 60,132 22.1 17,840 63.4 920 3.6 1,235 30.4 80,127 24.3 BIG 8,268 3.0 1,378 4.9 4,553 17.8 591 14.6 14,790 4.5 Total net par outstanding (1) $ 272,114 100.0 % $ 28,128 100.0 % $ 25,562 100.0 % $ 4,060 100.0 % $ 329,864 100.0 % _____________________ (1) Excludes $1.4 billion of loss mitigation securities insured and held by the Company as of June 30, 2016 , which are primarily BIG. Financial Guaranty Portfolio by Internal Rating As of December 31, 2015 Public Finance U.S. Public Finance Non-U.S. Structured Finance U.S Structured Finance Non-U.S Total Rating Category Net Par Outstanding % Net Par Outstanding % Net Par Outstanding % Net Par Outstanding % Net Par Outstanding % (dollars in millions) AAA $ 3,053 1.1 % $ 709 2.4 % $ 14,366 45.2 % $ 2,709 50.6 % $ 20,837 5.8 % AA 69,274 23.7 2,017 6.8 7,934 25.0 177 3.3 79,402 22.1 A 157,440 53.9 6,765 22.9 2,486 7.8 555 10.3 167,246 46.7 BBB 54,315 18.6 18,708 63.2 1,515 4.8 1,365 25.5 75,903 21.2 BIG 7,784 2.7 1,378 4.7 5,469 17.2 552 10.3 15,183 4.2 Total net par outstanding (1) $ 291,866 100.0 % $ 29,577 100.0 % $ 31,770 100.0 % $ 5,358 100.0 % $ 358,571 100.0 % _____________________ (1) Excludes $1.5 billion of loss mitigation securities insured and held by the Company as of December 31, 2015 , which are primarily BIG.
Components of BIG Net Par Outstanding (Insurance and Credit Derivative Form)	Components of BIG Net Par Outstanding (Insurance and Credit Derivative Form) As of June 30, 2016 BIG Net Par Outstanding Net Par BIG 1 BIG 2 BIG 3 Total BIG Outstanding (in millions) U.S. public finance (1) $ 4,902 $ 3,191 $ 175 $ 8,268 $ 272,114 Non-U.S. public finance 863 515 — 1,378 28,128 Structured finance: First lien U.S. residential mortgage-backed securities ("RMBS"): Prime first lien 21 83 20 124 237 Alt-A first lien 120 42 459 621 1,090 Option ARM 27 6 63 96 186 Subprime 128 210 882 1,220 3,193 Second lien U.S. RMBS 22 73 1,271 1,366 1,376 Total U.S. RMBS 318 414 2,695 3,427 6,082 Triple-X life insurance transactions — — 216 216 2,189 Trust preferred securities (“TruPS”) 436 127 — 563 3,255 Student loans — 68 42 110 1,645 Other structured finance 537 254 37 828 16,451 Total $ 7,056 $ 4,569 $ 3,165 $ 14,790 $ 329,864 Components of BIG Net Par Outstanding (Insurance and Credit Derivative Form) As of December 31, 2015 BIG Net Par Outstanding Net Par BIG 1 BIG 2 BIG 3 Total BIG Outstanding (in millions) U.S. public finance $ 4,765 $ 2,883 $ 136 $ 7,784 $ 291,866 Non-U.S. public finance 875 503 — 1,378 29,577 Structured finance: First lien U.S. RMBS: Prime first lien 225 34 25 284 445 Alt-A first lien 119 73 601 793 1,353 Option ARM 39 12 90 141 252 Subprime 146 228 930 1,304 3,457 Second lien U.S. RMBS 491 50 910 1,451 1,560 Total U.S. RMBS 1,020 397 2,556 3,973 7,067 Triple-X life insurance transactions — — 216 216 2,750 TruPS 679 127 — 806 4,379 Student loans 12 68 83 163 1,818 Other structured finance 672 151 40 863 21,114 Total $ 8,023 $ 4,129 $ 3,031 $ 15,183 $ 358,571 _____________________ (1) Subsequent to June 30, 2016, and as a result of its July 1, 2016 Puerto Rico claim payments, the Company downgraded from BIG 1 to BIG 3 $1,803 million net par outstanding of financial guaranty insurance across two risks. .
BIG Net Par Outstanding and Number of Risks	The following table provides information on financial guaranty insurance contracts categorized as BIG. Financial Guaranty Insurance BIG Transaction Loss Summary As of June 30, 2016 BIG Categories BIG 1 BIG 2 BIG 3 Total BIG, Net Effect of Consolidating FG VIEs Total Gross Ceded Gross Ceded Gross Ceded (dollars in millions) Number of risks(1) 198 (42 ) 76 (12 ) 131 (46 ) 405 — 405 Remaining weighted-average contract period (in years) 9.8 7.4 12.7 10.0 6.6 5.1 10.1 — 10.1 Outstanding exposure: Principal $ 7,012 $ (466 ) $ 4,571 $ (452 ) $ 3,276 $ (237 ) $ 13,704 $ — $ 13,704 Interest 3,618 (200 ) 2,991 (228 ) 937 (50 ) 7,068 — 7,068 Total(2) $ 10,630 $ (666 ) $ 7,562 $ (680 ) $ 4,213 $ (287 ) $ 20,772 $ — $ 20,772 Expected cash outflows (inflows) $ 331 $ (27 ) $ 1,466 $ (82 ) $ 1,228 $ (57 ) $ 2,859 $ (330 ) $ 2,529 Potential recoveries Undiscounted R&W 122 (3 ) (2 ) — (33 ) 1 85 — 85 Other(3) (667 ) 16 (298 ) 11 (499 ) 30 (1,407 ) 200 (1,207 ) Total potential recoveries (545 ) 13 (300 ) 11 (532 ) 31 (1,322 ) 200 (1,122 ) Subtotal (214 ) (14 ) 1,166 (71 ) 696 (26 ) 1,537 (130 ) 1,407 Discount 133 (3 ) (232 ) 12 (29 ) (97 ) (216 ) 17 (199 ) Present value of expected cash flows $ (81 ) $ (17 ) $ 934 $ (59 ) $ 667 $ (123 ) $ 1,321 $ (113 ) $ 1,208 Deferred premium revenue $ 256 $ (8 ) $ 152 $ (7 ) $ 347 $ (32 ) $ 708 $ (94 ) $ 614 Reserves (salvage) $ (177 ) $ (11 ) $ 811 $ (53 ) $ 378 $ (11 ) $ 937 $ (71 ) $ 866 Financial Guaranty Insurance BIG Transaction Loss Summary As of December 31, 2015 BIG Categories BIG 1 BIG 2 BIG 3 Total BIG, Net Effect of Consolidating FG VIEs Total Gross Ceded Gross Ceded Gross Ceded (dollars in millions) Number of risks(1) 202 (46 ) 85 (13 ) 132 (44 ) 419 — 419 Remaining weighted-average contract period (in years) 10.0 8.7 13.8 9.5 7.7 5.9 10.7 — 10.7 Outstanding exposure: Principal $ 7,751 $ (732 ) $ 3,895 $ (240 ) $ 3,087 $ (187 ) $ 13,574 $ — $ 13,574 Interest 4,109 (354 ) 2,805 (110 ) 1,011 (42 ) 7,419 — 7,419 Total(2) $ 11,860 $ (1,086 ) $ 6,700 $ (350 ) $ 4,098 $ (229 ) $ 20,993 $ — $ 20,993 Expected cash outflows (inflows) $ 386 $ (42 ) $ 1,158 $ (60 ) $ 1,464 $ (53 ) $ 2,853 $ (343 ) $ 2,510 Potential recoveries Undiscounted R&W 69 (2 ) (49 ) 1 (85 ) 5 (61 ) 7 (54 ) Other(3) (441 ) 14 (118 ) 7 (587 ) 19 (1,106 ) 175 (931 ) Total potential recoveries (372 ) 12 (167 ) 8 (672 ) 24 (1,167 ) 182 (985 ) Subtotal 14 (30 ) 991 (52 ) 792 (29 ) 1,686 (161 ) 1,525 Discount 91 3 (286 ) 12 (58 ) (89 ) (327 ) 41 (286 ) Present value of expected cash flows $ 105 $ (27 ) $ 705 $ (40 ) $ 734 $ (118 ) $ 1,359 $ (120 ) $ 1,239 Deferred premium revenue $ 371 $ (37 ) $ 150 $ (4 ) $ 386 $ (32 ) $ 834 $ (100 ) $ 734 Reserves (salvage) $ 2 $ (19 ) $ 591 $ (38 ) $ 404 $ (9 ) $ 931 $ (74 ) $ 857 ____________________ (1) A risk represents the aggregate of the financial guaranty policies that share the same revenue source for purposes of making debt service payments. The ceded number of risks represents the number of risks for which the Company ceded a portion of its exposure. (2) Includes BIG amounts related to FG VIEs. (3) Includes excess spread.
Net Direct Economic Exposure to Selected European Countries	Net Direct Economic Exposure to Selected European Countries(1) As of June 30, 2016 Hungary Italy Portugal Spain Turkey Total (in millions) Sub-sovereign exposure(2) $ 265 $ 793 $ 80 $ 366 $ — $ 1,504 Non-sovereign exposure(3) 174 432 — — 204 810 Total $ 439 $ 1,225 $ 80 $ 366 $ 204 $ 2,314 Total BIG (See Note 5) $ 369 $ — $ 80 $ 366 $ — $ 815 ____________________ (1) While the Company’s exposures are shown in U.S. dollars, the obligations the Company insures are in various currencies, primarily Euros. (2) Sub-sovereign exposure in Selected European Countries includes transactions backed by receivables from or supported by sub-sovereigns, which are governmental or government-backed entities other than the ultimate governing body of the country. (3) Non-sovereign exposure in Selected European Countries includes debt of regulated utilities, RMBS and diversified payment rights ("DPR") securitizations.
Schedule Of Insured Financial Obligations With Outstanding Principal Amount With Below Investment Grade [Table Text Block]	BIG Net Par Outstanding and Number of Risks As of June 30, 2016 Net Par Outstanding Number of Risks(2) Description Financial Guaranty Insurance(1) Credit Derivative Total Financial Guaranty Insurance(1) Credit Derivative Total (dollars in millions) BIG: Category 1 (3) $ 6,546 $ 510 $ 7,056 198 10 208 Category 2 4,119 450 4,569 76 5 81 Category 3 (3) 3,039 126 3,165 131 12 143 Total BIG $ 13,704 $ 1,086 $ 14,790 405 27 432 BIG Net Par Outstanding and Number of Risks As of December 31, 2015 Net Par Outstanding Number of Risks(2) Description Financial Guaranty Insurance(1) Credit Derivative Total Financial Guaranty Insurance(1) Credit Derivative Total (dollars in millions) BIG: Category 1 $ 7,019 $ 1,004 $ 8,023 202 12 214 Category 2 3,655 474 4,129 85 8 93 Category 3 2,900 131 3,031 132 12 144 Total BIG $ 13,574 $ 1,609 $ 15,183 419 32 451 _____________________ (1) Includes net par outstanding for VIEs. (2) A risk represents the aggregate of the financial guaranty policies that share the same revenue source for purposes of making debt service payments. (3) Subsequent to June 30, 2016, and as a result of its July 1, 2016 Puerto Rico claim payments, the Company downgraded from BIG 1 to BIG 3 $1,803 million net par outstanding of financial guaranty insurance across two risks.
Puerto Rico [Member]
Schedule of Insured Financial Obligations [Line Items]
BIG Net Par Outstanding and Number of Risks	Amortization Schedule of Puerto Rico Net Par Outstanding and Net Debt Service Outstanding As of June 30, 2016 Scheduled Net Par Amortization Scheduled Net Debt Service Amortization (in millions) 2016 (July 1 – September 30) $ 302 $ 428 2016 (October 1 – December 31) 0 2 2017 222 463 2018 179 410 2019 204 424 2020 270 482 2021 125 323 2022 115 305 2023 150 338 2024 174 352 2025 196 366 2026-2030 943 1,633 2031-2035 1,131 1,599 2036-2040 579 780 2041-2045 296 380 2046-2047 168 181 Total $ 5,054 $ 8,466
Gross Par and Gross Debt Service Outstanding	Puerto Rico Gross Par and Gross Debt Service Outstanding Gross Par Outstanding Gross Debt Service Outstanding June 30, December 31, June 30, December 31, (in millions) Exposure to Puerto Rico $ 5,756 $ 5,755 $ 9,483 $ 9,632
Schedule of Geographic Exposure of Net Par Outstanding	Puerto Rico Net Par Outstanding As of As of (in millions) Commonwealth Constitutionally Guaranteed Commonwealth of Puerto Rico - General Obligation Bonds (1) $ 1,615 $ 1,615 Puerto Rico Public Buildings Authority (1) 188 188 Public Corporations - Certain Revenues Potentially Subject to Clawback PRHTA (Transportation revenue) 910 909 PRHTA (Highways revenue) 369 370 PRCCDA 164 164 PRIFA (1) 18 18 Other Public Corporations PREPA 744 744 PRASA 388 388 MFA 387 387 COFINA 270 269 U of PR 1 1 Total net exposure to Puerto Rico $ 5,054 $ 5,053 ____________________ (1) As of the date of this filing, the Company has paid claims on these credits.

Expected Loss to be Paid (Table

Expected Loss to be Paid (Tables)	6 Months Ended
	Jun. 30, 2016
Expected Losses [Abstract]
Net Expected Loss to be Paid After Net Expected Recoveries for Breaches of R&W Roll Forward	The following tables present a roll forward of the present value of net expected loss to be paid for all contracts, whether accounted for as insurance, credit derivatives or financial guaranty ("FG") VIEs, by sector, after the benefit for expected recoveries for breaches of representations and warranties ("R&W") and other expected recoveries. The Company used weighted average risk-free rates for U.S. dollar denominated obligations that ranged from 0.0% to 2.46% as of June 30, 2016 and 0.0% to 3.25% as of December 31, 2015 . Net Expected Loss to be Paid After Net Expected Recoveries for Breaches of R&W Roll Forward Second Quarter Six Months 2016 2015 2016 2015 (in millions) Net expected loss to be paid, beginning of period $ 1,337 $ 1,154 $ 1,391 $ 1,169 Net expected loss to be paid on Radian Asset portfolio as of April 1, 2015 — 190 — 190 Economic loss development due to: Accretion of discount 6 7 15 14 Changes in discount rates 45 (47 ) 108 (40 ) Changes in timing and assumptions (29 ) 232 (42 ) 215 Total economic loss development 22 192 81 189 Paid losses (33 ) (26 ) (146 ) (38 ) Net expected loss to be paid, end of period $ 1,326 $ 1,510 $ 1,326 $ 1,510 Net Expected Loss to be Paid After Net Expected Recoveries for Breaches of R&W Roll Forward by Sector Second Quarter 2016 Net Expected Loss to be Paid (Recovered) as of March 31, 2016 Economic Loss Development (Paid) Recovered Losses (1) Net Expected (Recovered) as of (in millions) Public Finance: U.S. public finance $ 864 $ 111 $ (12 ) $ 963 Non-U.S. public finance 39 (2 ) — 37 Public Finance 903 109 (12 ) 1,000 Structured Finance: U.S. RMBS: First lien: Prime first lien (1 ) 0 4 3 Alt-A first lien 36 (38 ) (94 ) (96 ) Option ARM (47 ) (10 ) 1 (56 ) Subprime 240 (26 ) 13 227 Total first lien 228 (74 ) (76 ) 78 Second lien 65 (7 ) 56 114 Total U.S. RMBS 293 (81 ) (20 ) 192 Triple-X life insurance transactions 102 (2 ) 0 100 Student loans 32 (1 ) 0 31 Other structured finance 7 (3 ) (1 ) 3 Structured Finance 434 (87 ) (21 ) 326 Total $ 1,337 $ 22 $ (33 ) $ 1,326 Net Expected Loss to be Paid After Net Expected Recoveries for Breaches of R&W Roll Forward by Sector Second Quarter 2015 Net Expected Loss to be Paid (Recovered) as of March 31, 2015 Net Expected Loss to be Paid (Recovered) on Radian Asset portfolio as of April 1, 2015 Economic Loss Development (Paid) Recovered Losses (1) Net Expected (Recovered) as of (in millions) Public Finance: U.S. public finance $ 310 $ 81 $ 226 $ (4 ) $ 613 Non-U.S public finance 42 4 (2 ) — 44 Public Finance 352 85 224 (4 ) 657 Structured Finance: U.S. RMBS: First lien: Prime first lien 3 — (1 ) (1 ) 1 Alt-A first lien 289 7 (16 ) (15 ) 265 Option ARM (16 ) 0 (3 ) 1 (18 ) Subprime 293 (4 ) (6 ) (10 ) 273 Total first lien 569 3 (26 ) (25 ) 521 Second lien 1 1 (6 ) 7 3 Total U.S. RMBS 570 4 (32 ) (18 ) 524 Triple-X life insurance transactions 165 — 2 (2 ) 165 Student loans 62 — 1 (5 ) 58 Other structured finance 5 101 (3 ) 3 106 Structured Finance 802 105 (32 ) (22 ) 853 Total $ 1,154 $ 190 $ 192 $ (26 ) $ 1,510 Net Expected Loss to be Paid After Net Expected Recoveries for Breaches of R&W Roll Forward by Sector Six Months 2016 Net Expected Loss to be Paid (Recovered) as of December 31, 2015 (2) Economic Loss Development (Paid) Recovered Losses (1) Net Expected (Recovered) as of (in millions) Public Finance: U.S. public finance $ 771 $ 209 $ (17 ) $ 963 Non-U.S. public finance 38 (1 ) — 37 Public Finance 809 208 (17 ) 1,000 Structured Finance: U.S. RMBS: First lien: Prime first lien (2 ) 0 5 3 Alt-A first lien 127 (54 ) (169 ) (96 ) Option ARM (28 ) (31 ) 3 (56 ) Subprime 251 (25 ) 1 227 Total first lien 348 (110 ) (160 ) 78 Second lien 61 (2 ) 55 114 Total U.S. RMBS 409 (112 ) (105 ) 192 Triple-X life insurance transactions 99 2 (1 ) 100 Student loans 54 (15 ) (8 ) 31 Other structured finance 20 (2 ) (15 ) 3 Structured Finance 582 (127 ) (129 ) 326 Total $ 1,391 $ 81 $ (146 ) $ 1,326 Net Expected Loss to be Paid After Net Expected Recoveries for Breaches of R&W Roll Forward by Sector Six Months 2015 Net Expected Loss to be Paid (Recovered ) as of December 31, 2014 Net Expected Loss to be Paid (Recovered) on Radian Asset portfolio as of April 1, 2015 Economic Loss Development (Paid) Recovered Losses (1) Net Expected ) as of (in millions) Public Finance: U.S. public finance $ 303 $ 81 $ 235 $ (6 ) $ 613 Non-U.S. public finance 45 4 (5 ) — 44 Public Finance 348 85 230 (6 ) 657 Structured Finance: U.S. RMBS: First lien: Prime first lien 4 — (1 ) (2 ) 1 Alt-A first lien 304 7 (21 ) (25 ) 265 Option ARM (16 ) 0 1 (3 ) (18 ) Subprime 303 (4 ) (7 ) (19 ) 273 Total first lien 595 3 (28 ) (49 ) 521 Second lien (11 ) 1 0 13 3 Total U.S. RMBS 584 4 (28 ) (36 ) 524 Triple-X life insurance transactions 161 — 7 (3 ) 165 Student loans 68 — (5 ) (5 ) 58 Other structured finance 8 101 (15 ) 12 106 Structured Finance 821 105 (41 ) (32 ) 853 Total $ 1,169 $ 190 $ 189 $ (38 ) $ 1,510 ____________________ (1) Net of ceded paid losses, whether or not such amounts have been settled with reinsurers. Ceded paid losses are typically settled 45 days after the end of the reporting period. Such amounts are recorded in reinsurance recoverable on paid losses included in other assets. The Company paid $7 million and $5 million in loss adjustment expenses (" LAE") for Second Quarter 2016 and 2015 , respectively, and $9 million and $9 million in LAE for Six Months 2016 and 2015 , respectively. (2) Includes expected LAE to be paid of $8 million as of June 30, 2016 and $12 million as of December 31, 2015 .
Schedule Of Net Expected Losses To Be Paid For Future Benefits, Net Representations And Warranties	Future Net R&W Recoverable (Payable)(1) As of As of (in millions) U.S. RMBS: First lien $ (90 ) $ 0 Second lien 32 79 Total $ (58 ) $ 79 ____________________ (1) The Company’s agreements with R&W providers generally provide that, as the Company makes claim payments, the R&W providers reimburse it for those claims; if the Company later receives reimbursement through the transaction (for example, from excess spread), the Company repays the R&W providers.
Net Expected Loss to be Paid By Accounting Model	The following tables present the present value of net expected loss to be paid for all contracts by accounting model, by sector and after the benefit for expected recoveries for breaches of R&W. Net Expected Loss to be Paid (Recovered) By Accounting Model As of June 30, 2016 Financial Guaranty Insurance FG VIEs(1) and Other Credit Derivatives(2) Total (in millions) Public Finance: U.S. public finance $ 963 $ — $ 0 $ 963 Non-U.S. public finance 37 — — 37 Public Finance 1,000 — 0 1,000 Structured Finance: U.S. RMBS: First lien: Prime first lien 3 — — 3 Alt-A first lien (115 ) 20 (1 ) (96 ) Option ARM (51 ) — (5 ) (56 ) Subprime 145 50 32 227 Total first lien (18 ) 70 26 78 Second lien 68 43 3 114 Total U.S. RMBS 50 113 29 192 Triple-X life insurance transactions 89 — 11 100 Student loans 31 — — 31 Other structured finance 38 1 (36 ) 3 Structured Finance 208 114 4 326 Total $ 1,208 $ 114 $ 4 $ 1,326 Net Expected Loss to be Paid (Recovered) By Accounting Model As of December 31, 2015 Financial Guaranty Insurance FG VIEs(1) and Other Credit Derivatives(2) Total (in millions) Public Finance: U.S. public finance $ 771 $ — $ 0 $ 771 Non-U.S. public finance 38 — — 38 Public Finance 809 — 0 809 Structured Finance: U.S. RMBS: First lien: Prime first lien 2 — (4 ) (2 ) Alt-A first lien 110 17 0 127 Option ARM (27 ) — (1 ) (28 ) Subprime 153 59 39 251 Total first lien 238 76 34 348 Second lien 13 44 4 61 Total U.S. RMBS 251 120 38 409 Triple-X life insurance transactions 88 — 11 99 Student loans 54 — — 54 Other structured finance 37 16 (33 ) 20 Structured Finance 430 136 16 582 Total $ 1,239 $ 136 $ 16 $ 1,391 ___________________ (1) Refer to Note 9, Consolidated Variable Interest Entities. (2) Refer to Note 8, Financial Guaranty Contracts Accounted for as Credit Derivatives.
Schedule of Net Economic Loss Development	The following tables present the net economic loss development for all contracts by accounting model, by sector and after the benefit for expected recoveries for breaches of R&W. Net Economic Loss Development (Benefit) By Accounting Model Second Quarter 2016 Financial Guaranty Insurance FG VIEs(1) and Other Credit Derivatives(2) Total (in millions) Public Finance: U.S. public finance $ 111 $ — $ — $ 111 Non-U.S. public finance (2 ) — — (2 ) Public Finance 109 — — 109 Structured Finance: U.S. RMBS: First lien: Prime first lien 0 — 0 0 Alt-A first lien (39 ) 2 (1 ) (38 ) Option ARM (9 ) — (1 ) (10 ) Subprime (17 ) (2 ) (7 ) (26 ) Total first lien (65 ) 0 (9 ) (74 ) Second lien (1 ) (6 ) 0 (7 ) Total U.S. RMBS (66 ) (6 ) (9 ) (81 ) Triple-X life insurance transactions (1 ) — (1 ) (2 ) Student loans (1 ) — — (1 ) Other structured finance (1 ) (1 ) (1 ) (3 ) Structured Finance (69 ) (7 ) (11 ) (87 ) Total $ 40 $ (7 ) $ (11 ) $ 22 Net Economic Loss Development (Benefit) By Accounting Model Second Quarter 2015 Financial Guaranty Insurance FG VIEs(1) and Other Credit Derivatives(2) Total (in millions) Public Finance: U.S. public finance $ 232 $ — $ (6 ) $ 226 Non-U.S. public finance (2 ) — — (2 ) Public Finance 230 — (6 ) 224 Structured Finance: U.S. RMBS: First lien: Prime first lien (1 ) — — (1 ) Alt-A first lien (12 ) (1 ) (3 ) (16 ) Option ARM (4 ) — 1 (3 ) Subprime — (1 ) (5 ) (6 ) Total first lien (17 ) (2 ) (7 ) (26 ) Second lien (7 ) — 1 (6 ) Total U.S. RMBS (24 ) (2 ) (6 ) (32 ) Triple-X life insurance transactions 1 — 1 2 Student loans 1 — — 1 Other structured finance (1 ) 1 (3 ) (3 ) Structured Finance (23 ) (1 ) (8 ) (32 ) Total $ 207 $ (1 ) $ (14 ) $ 192 Net Economic Loss Development (Benefit) By Accounting Model Six Months 2016 Financial Guaranty Insurance FG VIEs(1) and Other Credit Derivatives(2) Total (in millions) Public Finance: U.S. public finance $ 209 $ — $ — $ 209 Non-U.S. public finance (1 ) — — (1 ) Public Finance 208 — — 208 Structured Finance: U.S. RMBS: First lien: Prime first lien 0 — 0 0 Alt-A first lien (56 ) 3 (1 ) (54 ) Option ARM (28 ) — (3 ) (31 ) Subprime (14 ) (2 ) (9 ) (25 ) Total first lien (98 ) 1 (13 ) (110 ) Second lien 1 (3 ) 0 (2 ) Total U.S. RMBS (97 ) (2 ) (13 ) (112 ) Triple-X life insurance transactions 2 — 0 2 Student loans (15 ) — — (15 ) Other structured finance 3 (1 ) (4 ) (2 ) Structured Finance (107 ) (3 ) (17 ) (127 ) Total $ 101 $ (3 ) $ (17 ) $ 81 Net Economic Loss Development (Benefit) By Accounting Model Six Months 2015 Financial Guaranty Insurance FG VIEs(1) and Other Credit Derivatives(2) Total (in millions) Public Finance: U.S. public finance $ 241 $ — $ (6 ) $ 235 Non-U.S. public finance (5 ) — — (5 ) Public Finance 236 — (6 ) 230 Structured Finance: U.S. RMBS: First lien: Prime first lien 0 — (1 ) (1 ) Alt-A first lien (10 ) (1 ) (10 ) (21 ) Option ARM (3 ) — 4 1 Subprime (4 ) 3 (6 ) (7 ) Total first lien (17 ) 2 (13 ) (28 ) Second lien 1 (1 ) — — Total U.S. RMBS (16 ) 1 (13 ) (28 ) Triple-X life insurance transactions 5 — 2 7 Student loans (5 ) — — (5 ) Other structured finance (1 ) — (14 ) (15 ) Structured Finance (17 ) 1 (25 ) (41 ) Total $ 219 $ 1 $ (31 ) $ 189 _________________ (1) Refer to Note 9, Consolidated Variable Interest Entities. (2) Refer to Note 8, Financial Guaranty Contracts Accounted for as Credit Derivatives.
Liquidation Rates and Key Assumptions in Base Case Expected Loss Estimates First Lien RMBS	Key Assumptions in Base Case Expected Loss Estimates First Lien RMBS(1) As of As of As of Range Weighted Average Range Weighted Average Range Weighted Average Alt-A First Lien Plateau CDR 0.9 % - 27.0% 6.1% 0.9 % - 27.8% 6.4% 1.7 % – 26.4% 6.4% Intermediate CDR 0.2 % - 5.4% 1.2% 0.2 % - 5.6% 1.3% 0.3 % – 5.3% 1.3% Period until intermediate CDR 48 months 48 months 48 months Final CDR 0.0 % - 1.3% 0.3% 0.0 % - 1.4% 0.3% 0.1 % – 1.3% 0.3% Initial loss severity: 2005 and prior 60.0% 60.0% 60.0% 2006 80.0% 80.0% 70.0% 2007 70.0% 65.0% 65.0% Initial conditional prepayment rate ("CPR") 3.5 % - 29.3% 11.0% 2.7 % - 31.6% 11.8% 2.7 % – 32.5% 11.5% Final CPR(2) 15% 15% 15% Option ARM Plateau CDR 3.2 % - 10.1% 7.4% 3.4 % - 10.6% 7.8% 3.5 % – 10.3% 7.8% Intermediate CDR 0.6 % - 2.0% 1.5% 0.7 % - 2.1% 1.6% 0.7 % – 2.1% 1.6% Period until intermediate CDR 48 months 48 months 48 months Final CDR 0.2 % - 0.5% 0.3% 0.2 % - 0.5% 0.4% 0.2 % – 0.5% 0.4% Initial loss severity: 2005 and prior 60.0% 60.0% 60.0% 2006 70.0% 70.0% 70.0% 2007 75.0% 65.0% 65.0% Initial CPR 2.0 % - 13.2% 5.7% 2.0 % - 13.7% 5.5% 1.5 % – 10.9% 5.1% Final CPR(2) 15% 15% 15% Subprime Plateau CDR 4.4 % - 12.7% 8.5% 4.2 % - 14.4% 9.4% 4.7 % – 13.2% 9.5% Intermediate CDR 0.9 % - 2.5% 1.7% 0.8 % - 2.9% 1.9% 0.9 % – 2.6% 1.9% Period until intermediate CDR 48 months 48 months 48 months Final CDR 0.2 % - 0.6% 0.4% 0.2 % - 0.7% 0.4% 0.2 % – 0.7% 0.4% Initial loss severity: 2005 and prior 80.0% 80.0% 75.0% 2006 90.0% 90.0% 90.0% 2007 90.0% 90.0% 90.0% Initial CPR 0.6 % - 11.3% 4.9% 0.3 % - 9.2% 4.2% 0.0 % – 10.1% 3.6% Final CPR(2) 15% 15% 15% ____________________ (1) Represents variables for most heavily weighted scenario (the “base case”). (2) For transactions where the initial CPR is higher than the final CPR, the initial CPR is held constant and the final CPR is not used. First Lien Liquidation Rates June 30, 2016 March 31, 2016 December 31, 2015 Current Loans Modified in the Previous 12 Months Alt A and Prime 25% 25% 25% Option ARM 25 25 25 Subprime 25 25 25 Current Loans Delinquent in the Previous 12 Months Alt A and Prime 25 25 25 Option ARM 25 25 25 Subprime 25 25 25 30 – 59 Days Delinquent Alt A and Prime 35 35 35 Option ARM 40 40 40 Subprime 45 45 45 60 – 89 Days Delinquent Alt A and Prime 45 45 45 Option ARM 50 50 50 Subprime 50 55 55 90+ Days Delinquent Alt A and Prime 55 55 55 Option ARM 60 60 60 Subprime 55 60 60 Bankruptcy Alt A and Prime 45 45 45 Option ARM 50 50 50 Subprime 40 40 40 Foreclosure Alt A and Prime 65 65 65 Option ARM 70 70 70 Subprime 65 70 70 Real Estate Owned All 100 100 100
Key Assumptions in Base Case Expected Loss Estimates Second Lien RMBS	Key Assumptions in Base Case Expected Loss Estimates HELOCs (1) As of As of As of Range Weighted Average Range Weighted Average Range Weighted Average Plateau CDR 2.5 % – 26.3% 12.6% 5.3 % – 26.1% 11.9% 4.9 % – 23.5% 10.3% Final CDR trended down to 0.5 % – 3.2% 1.2% 0.5 % – 3.2% 1.2% 0.5 % – 3.2% 1.2% Period until final CDR 34 months 34 months 34 months Initial CPR 11.0 % – 15.4% 11.1% 11.0 % – 14.9% 11.1% 10.9% Final CPR(2) 10.0 % – 15.4% 13.3% 10.0 % – 15.0% 13.3% 10.0 % – 15.0% 13.3% Loss severity 98.0% 98.0% 98.0% ____________________ (1) Represents variables for most heavily weighted scenario (the “base case”). (2) For transactions where the initial CPR is higher than the final CPR, the initial CPR is held constant and the final CPR is not used.

Financial Guaranty Insurance (T

Financial Guaranty Insurance (Tables)	6 Months Ended
	Jun. 30, 2016
Insurance [Abstract]
Net Earned Premiums	Net Earned Premiums Second Quarter Six Months 2016 2015 2016 2015 (in millions) Scheduled net earned premiums $ 93 $ 118 $ 184 $ 214 Acceleration of net earned premiums (1) 117 96 206 137 Accretion of discount on net premiums receivable 4 5 7 9 Financial guaranty insurance net earned premiums 214 219 397 360 Other — 0 0 1 Net earned premiums (2) $ 214 $ 219 $ 397 $ 361 ___________________ (1) Reflects the unscheduled refunding or termination of the insurance on an insured obligation as well as changes in scheduled earnings due to changes in the expected lives of the insured obligations. (2) Excludes $3 million and $5 million for Second Quarter 2016 and 2015 , respectively, and $8 million and $10 million for Six Months 2016 and 2015 , respectively, related to consolidated FG VIEs.
Components of Unearned Premium Reserve	Components of Unearned Premium Reserve As of June 30, 2016 As of December 31, 2015 Gross Ceded Net(1) Gross Ceded Net(1) (in millions) Deferred premium revenue 3,641 230 3,411 4,008 238 3,770 Contra-paid (2) (24 ) (2 ) (22 ) (12 ) (6 ) (6 ) Unearned premium reserve $ 3,617 $ 228 $ 3,389 $ 3,996 $ 232 $ 3,764 ____________________ (1) Excludes $98 million and $110 million of deferred premium revenue, and $30 million and $30 million of contra-paid related to FG VIEs as of June 30, 2016 and December 31, 2015 , respectively. (2) See "Financial Guaranty Insurance Losses– Insurance Contracts' Loss Information" below for an explanation of "contra-paid".
Gross Premium Receivable, Net of Commissions on Assumed Business Roll Forward	Gross Premium Receivable, Net of Commissions on Assumed Business Roll Forward Six Months 2016 2015 (in millions) Beginning of period, December 31 $ 693 $ 729 Premiums receivable acquired in Radian Asset Acquisition on April 1, 2015 — 2 Gross written premiums, net of commissions on assumed business 83 61 Gross premiums received, net of commissions on assumed business (107 ) (79 ) Adjustments: Changes in the expected term (27 ) (9 ) Accretion of discount, net of commissions on assumed business 3 10 Foreign exchange translation (22 ) (8 ) Consolidation/deconsolidation of FG VIEs 0 (4 ) End of period, June 30 (1) $ 623 $ 702 ____________________ (1) Excludes $11 million and $23 million as of June 30, 2016 and June 30, 2015 , respectively, related to consolidated FG VIEs. Excludes $1 million related to non-financial guaranty line of business as of June 30, 2015. Expected Collections of Financial Guaranty Insurance Gross Premiums Receivable, Net of Commissions on Assumed Business (Undiscounted) As of June 30, 2016 (in millions) 2016 (July 1 – September 30) $ 21 2016 (October 1 – December 31) 21 2017 66 2018 59 2019 54 2020 53 2021-2025 212 2026-2030 139 2031-2035 97 After 2035 79 Total(1) $ 801 ____________________ (1) Excludes expected cash collections on FG VIEs of $14 million .
Schedule of Net Earned Premiums	Scheduled Financial Guaranty Insurance Net Earned Premiums As of June 30, 2016 (in millions) 2016 (July 1 – September 30) $ 89 2016 (October 1 – December 31) 85 2017 313 2018 287 2019 258 2020 236 2021-2025 922 2026-2030 588 2031-2035 350 After 2035 283 Net deferred premium revenue(1) 3,411 Future accretion 166 Total future net earned premiums $ 3,577 ____________________ (1) Excludes scheduled net earned premiums on consolidated FG VIEs of $98 million .
Selected Information for Policies Paid in Installments	Selected Information for Financial Guaranty Insurance Policies Paid in Installments As of As of (dollars in millions) Premiums receivable, net of commission payable $ 623 $ 693 Gross deferred premium revenue 1,086 1,240 Weighted-average risk-free rate used to discount premiums 3.1 % 3.1 % Weighted-average period of premiums receivable (in years) 9.2 9.4
Loss and LAE Reserve and Salvage and Subrogation Recoverable Net of Reinsurance Insurance Contracts	Loss and LAE Reserve and Salvage and Subrogation Recoverable Net of Reinsurance Insurance Contracts As of June 30, 2016 As of December 31, 2015 Loss and LAE Reserve, net Salvage and Subrogation Recoverable, net Net Reserve (Recoverable) Loss and LAE Reserve, net Salvage and Subrogation Recoverable, net Net Reserve (Recoverable) (in millions) Public Finance: U.S. public finance $ 807 $ 14 $ 793 $ 604 $ 7 $ 597 Non-U.S. public finance 24 — 24 25 — 25 Public Finance 831 14 817 629 7 622 Structured Finance: U.S. RMBS: First lien: Prime first lien 3 — 3 2 — 2 Alt-A first lien 40 184 (144 ) 46 — 46 Option ARM 9 58 (49 ) 13 42 (29 ) Subprime 147 14 133 169 21 148 First lien 199 256 (57 ) 230 63 167 Second lien 84 45 39 32 53 (21 ) Total U.S. RMBS 283 301 (18 ) 262 116 146 Triple-X life insurance transactions 83 — 83 82 — 82 Student loans 30 — 30 51 — 51 Other structured finance 30 1 29 48 — 48 Structured Finance 426 302 124 443 116 327 Subtotal 1,257 316 941 1,072 123 949 Other recoverables — 3 (3 ) — 3 (3 ) Subtotal 1,257 319 938 1,072 126 946 Effect of consolidating FG VIEs (71 ) — (71 ) (74 ) 0 (74 ) Total (1) $ 1,186 $ 319 $ 867 $ 998 $ 126 $ 872 ____________________ (1) See “Components of Net Reserves (Salvage)” table for loss and LAE reserve and salvage and subrogation recoverable components.
Components of Net Reserves (Salvage) Insurance Contracts	Components of Net Reserves (Salvage) As of As of (in millions) Loss and LAE reserve $ 1,268 $ 1,067 Reinsurance recoverable on unpaid losses (82 ) (69 ) Loss and LAE reserve, net 1,186 998 Salvage and subrogation recoverable (323 ) (126 ) Salvage and subrogation payable(1) 7 3 Other recoverables (3 ) (3 ) Salvage and subrogation recoverable, net and other recoverable (319 ) (126 ) Net reserves (salvage) $ 867 $ 872 ____________________ (1) Recorded as a component of reinsurance balances payable.
Reconciliation of Net Expected Loss to be Paid and Net Expected Loss to be Expensed Financial Guaranty Insurance Contracts	Reconciliation of Net Expected Loss to be Paid and Net Expected Loss to be Expensed Financial Guaranty Insurance Contracts As of (in millions) Net expected loss to be paid - financial guaranty insurance (1) $ 1,208 Contra-paid, net 22 Salvage and subrogation recoverable, net of reinsurance 316 Loss and LAE reserve - financial guaranty insurance contracts, net of reinsurance (1,185 ) Other recoveries 3 Net expected loss to be expensed (present value) (2) $ 364 ____________________ (1) See "Net Expected Loss to be Paid (Recovered) by Accounting Model" table in Note 5, Expected Loss to be Paid. (2) Excludes $72 million as of June 30, 2016 , related to consolidated FG VIEs.
Net Expected Loss to be Expensed Insurance Contracts	Net Expected Loss to be Expensed Financial Guaranty Insurance Contracts As of (in millions) 2016 (July 1 – September 30) $ 9 2016 (October 1 – December 31) 8 Subtotal 2016 17 2017 30 2018 28 2019 29 2020 27 2021-2025 103 2026-2030 71 2031-2035 40 After 2035 19 Net expected loss to be expensed 364 Future accretion 199 Total expected future loss and LAE $ 563
Loss and LAE Reported on the Consolidated Statements of Operations	Loss and LAE Reported on the Consolidated Statements of Operations Second Quarter Six Months 2016 2015 2016 2015 (in millions) Public Finance: U.S. public finance $ 116 $ 196 $ 213 $ 209 Non-U.S. public finance (1 ) 1 (1 ) 6 Public finance 115 197 212 215 Structured Finance: U.S. RMBS: First lien: Prime first lien (1 ) (1 ) (1 ) (1 ) Alt-A first lien 3 (9 ) 11 (11 ) Option ARM (7 ) 0 (21 ) (1 ) Subprime (11 ) 1 (7 ) 1 First lien (16 ) (9 ) (18 ) (12 ) Second lien 4 0 17 10 Total U.S. RMBS (12 ) (9 ) (1 ) (2 ) Triple-X life insurance transactions (1 ) 1 2 7 Student loans 0 1 (14 ) (5 ) Other structured finance (3 ) 0 (3 ) (2 ) Structured finance (16 ) (7 ) (16 ) (2 ) Loss and LAE on insurance contracts before FG VIE consolidation 99 190 196 213 Effect of consolidating FG VIEs 3 (2 ) (4 ) (7 ) Loss and LAE $ 102 $ 188 $ 192 $ 206
BIG Net Par Outstanding and Number of Risks	The following table provides information on financial guaranty insurance contracts categorized as BIG. Financial Guaranty Insurance BIG Transaction Loss Summary As of June 30, 2016 BIG Categories BIG 1 BIG 2 BIG 3 Total BIG, Net Effect of Consolidating FG VIEs Total Gross Ceded Gross Ceded Gross Ceded (dollars in millions) Number of risks(1) 198 (42 ) 76 (12 ) 131 (46 ) 405 — 405 Remaining weighted-average contract period (in years) 9.8 7.4 12.7 10.0 6.6 5.1 10.1 — 10.1 Outstanding exposure: Principal $ 7,012 $ (466 ) $ 4,571 $ (452 ) $ 3,276 $ (237 ) $ 13,704 $ — $ 13,704 Interest 3,618 (200 ) 2,991 (228 ) 937 (50 ) 7,068 — 7,068 Total(2) $ 10,630 $ (666 ) $ 7,562 $ (680 ) $ 4,213 $ (287 ) $ 20,772 $ — $ 20,772 Expected cash outflows (inflows) $ 331 $ (27 ) $ 1,466 $ (82 ) $ 1,228 $ (57 ) $ 2,859 $ (330 ) $ 2,529 Potential recoveries Undiscounted R&W 122 (3 ) (2 ) — (33 ) 1 85 — 85 Other(3) (667 ) 16 (298 ) 11 (499 ) 30 (1,407 ) 200 (1,207 ) Total potential recoveries (545 ) 13 (300 ) 11 (532 ) 31 (1,322 ) 200 (1,122 ) Subtotal (214 ) (14 ) 1,166 (71 ) 696 (26 ) 1,537 (130 ) 1,407 Discount 133 (3 ) (232 ) 12 (29 ) (97 ) (216 ) 17 (199 ) Present value of expected cash flows $ (81 ) $ (17 ) $ 934 $ (59 ) $ 667 $ (123 ) $ 1,321 $ (113 ) $ 1,208 Deferred premium revenue $ 256 $ (8 ) $ 152 $ (7 ) $ 347 $ (32 ) $ 708 $ (94 ) $ 614 Reserves (salvage) $ (177 ) $ (11 ) $ 811 $ (53 ) $ 378 $ (11 ) $ 937 $ (71 ) $ 866 Financial Guaranty Insurance BIG Transaction Loss Summary As of December 31, 2015 BIG Categories BIG 1 BIG 2 BIG 3 Total BIG, Net Effect of Consolidating FG VIEs Total Gross Ceded Gross Ceded Gross Ceded (dollars in millions) Number of risks(1) 202 (46 ) 85 (13 ) 132 (44 ) 419 — 419 Remaining weighted-average contract period (in years) 10.0 8.7 13.8 9.5 7.7 5.9 10.7 — 10.7 Outstanding exposure: Principal $ 7,751 $ (732 ) $ 3,895 $ (240 ) $ 3,087 $ (187 ) $ 13,574 $ — $ 13,574 Interest 4,109 (354 ) 2,805 (110 ) 1,011 (42 ) 7,419 — 7,419 Total(2) $ 11,860 $ (1,086 ) $ 6,700 $ (350 ) $ 4,098 $ (229 ) $ 20,993 $ — $ 20,993 Expected cash outflows (inflows) $ 386 $ (42 ) $ 1,158 $ (60 ) $ 1,464 $ (53 ) $ 2,853 $ (343 ) $ 2,510 Potential recoveries Undiscounted R&W 69 (2 ) (49 ) 1 (85 ) 5 (61 ) 7 (54 ) Other(3) (441 ) 14 (118 ) 7 (587 ) 19 (1,106 ) 175 (931 ) Total potential recoveries (372 ) 12 (167 ) 8 (672 ) 24 (1,167 ) 182 (985 ) Subtotal 14 (30 ) 991 (52 ) 792 (29 ) 1,686 (161 ) 1,525 Discount 91 3 (286 ) 12 (58 ) (89 ) (327 ) 41 (286 ) Present value of expected cash flows $ 105 $ (27 ) $ 705 $ (40 ) $ 734 $ (118 ) $ 1,359 $ (120 ) $ 1,239 Deferred premium revenue $ 371 $ (37 ) $ 150 $ (4 ) $ 386 $ (32 ) $ 834 $ (100 ) $ 734 Reserves (salvage) $ 2 $ (19 ) $ 591 $ (38 ) $ 404 $ (9 ) $ 931 $ (74 ) $ 857 ____________________ (1) A risk represents the aggregate of the financial guaranty policies that share the same revenue source for purposes of making debt service payments. The ceded number of risks represents the number of risks for which the Company ceded a portion of its exposure. (2) Includes BIG amounts related to FG VIEs. (3) Includes excess spread.

Fair Value Measurement (Tables)

Fair Value Measurement (Tables)	6 Months Ended
	Jun. 30, 2016
Fair Value Disclosures [Abstract]
Information by Credit Spread Type	Information by Credit Spread Type (1) As of As of Based on actual collateral specific spreads 13 % 13 % Based on market indices 72 % 73 % Provided by the CDS counterparty 15 % 14 % Total 100 % 100 % ____________________ (1) Based on par.
Schedule of example effects of change in gross spreads, company's own credit spread and cost to buy protection on the on the Company affect the amount of premium the company can demand for credit protection	Scenario 1 Scenario 2 bps % of Total bps % of Total Original gross spread/cash bond price (in bps) 185 500 Bank profit (in bps) 115 62 % 50 10 % Hedge cost (in bps) 30 16 % 440 88 % The premium the Company receives per annum (in bps) 40 22 % 10 2 %
Fair Value Hierarchy of Financial Instruments Carried at Fair Value	Fair Value Hierarchy of Financial Instruments Carried at Fair Value As of June 30, 2016 Fair Value Hierarchy Fair Value Level 1 Level 2 Level 3 (in millions) Assets: Investment portfolio, available-for-sale: Fixed-maturity securities Obligations of state and political subdivisions $ 5,603 $ — $ 5,562 $ 41 U.S. government and agencies 326 — 326 — Corporate securities 1,443 — 1,385 58 Mortgage-backed securities: RMBS 1,062 — 713 349 Commercial mortgage-backed securities ("CMBS") 539 — 539 — Asset-backed securities 730 — 166 564 Foreign government securities 257 — 257 — Total fixed-maturity securities 9,960 — 8,948 1,012 Short-term investments 585 521 64 — Other invested assets (1) 13 — 6 7 Credit derivative assets 36 — — 36 FG VIEs’ assets, at fair value 814 — — 814 Other assets 84 22 27 35 Total assets carried at fair value $ 11,492 $ 543 $ 9,045 $ 1,904 Liabilities: Credit derivative liabilities $ 432 $ — $ — $ 432 FG VIEs’ liabilities with recourse, at fair value 790 — — 790 FG VIEs’ liabilities without recourse, at fair value 115 — — 115 Total liabilities carried at fair value $ 1,337 $ — $ — $ 1,337 Fair Value Hierarchy of Financial Instruments Carried at Fair Value As of December 31, 2015 Fair Value Hierarchy Fair Value Level 1 Level 2 Level 3 (in millions) Assets: Investment portfolio, available-for-sale: Fixed-maturity securities Obligations of state and political subdivisions $ 5,841 $ — $ 5,833 $ 8 U.S. government and agencies 400 — 400 — Corporate securities 1,520 — 1,449 71 Mortgage-backed securities: RMBS 1,245 — 897 348 CMBS 513 — 513 — Asset-backed securities 825 — 168 657 Foreign government securities 283 — 283 — Total fixed-maturity securities 10,627 — 9,543 1,084 Short-term investments 396 305 31 60 Other invested assets (1) 12 — 5 7 Credit derivative assets 81 — — 81 FG VIEs’ assets, at fair value 1,261 — — 1,261 Other assets 106 23 21 62 Total assets carried at fair value $ 12,483 $ 328 $ 9,600 $ 2,555 Liabilities: Credit derivative liabilities $ 446 $ — $ — $ 446 FG VIEs’ liabilities with recourse, at fair value 1,225 — — 1,225 FG VIEs’ liabilities without recourse, at fair value 124 — — 124 Total liabilities carried at fair value $ 1,795 $ — $ — $ 1,795 ____________________ (1) Excluded from the table above are investments funds of $46 million and $45 million as of June 30, 2016 and December 31, 2015 , respectively, measured using NAV per share. Includes Level 3 mortgage loans that are recorded at fair value on a non-recurring basis.
Fair Value Assets Measured on Recurring Basis	Fair Value Level 3 Rollforward Recurring Basis Second Quarter 2015 Fixed-Maturity Securities Obligations Corporate Securities RMBS Asset- FG VIEs’ Other Credit FG VIEs' Liabilities FG VIEs’ Liabilities (in millions) Fair value as of March 31, 2015 $ 8 $ 79 $ 383 $ 226 $ 1,495 $ 40 $ (782 ) $ (1,278 ) $ (145 ) Radian Asset Acquisition — — 4 — 122 2 (215 ) (114 ) (4 ) Total pretax realized and unrealized gains/(losses) recorded in: (1) Net income (loss) 0 (2 ) (3 ) (2 ) 8 (2 ) 3 (2 ) 19 (3 ) 23 (4 ) 90 (6 ) (5 ) (3 ) (25 ) (3 ) Other comprehensive income (loss) (1 ) 1 (9 ) 8 — (1 ) — — — Purchases — — 1 — — — — — — Settlements — (7 ) — (51 ) (1 ) (40 ) — (19 ) 36 3 FG VIE consolidations — — (1 ) — — — — — — FG VIE deconsolidations — — — — — — — — — Fair value as of June 30, 2015 $ 7 $ 77 $ 335 $ 236 $ 1,596 $ 64 $ (926 ) $ (1,361 ) $ (171 ) Change in unrealized gains/(losses) related to financial instruments held as of June 30, 2015 $ 0 $ 1 $ (7 ) $ 8 $ 31 $ 22 $ 82 $ (6 ) $ (14 ) Fair Value Level 3 Rollforward Recurring Basis Six Months 2016 Fixed-Maturity Securities Obligations Corporate Securities RMBS Asset- Short-Term Investments FG VIEs’ Other Credit FG VIEs' Liabilities FG VIEs’ Liabilities (in millions) Fair value as of December 31, 2015 $ 8 $ 71 $ 348 $ 657 $ 60 $ 1,261 $ 65 $ (365 ) $ (1,225 ) $ (124 ) Total pretax realized and unrealized gains/(losses) recorded in: (1) Net income (loss) 0 (2 ) 4 (2 ) 2 (2 ) 11 (2 ) 0 (2 ) 109 (3 ) (27 ) (4 ) 3 (6 ) (91 ) (3 ) 4 (3 ) Other comprehensive income (loss) 1 (17 ) (2 ) (10 ) 0 — 0 — — — Purchases 33 — 40 — — — — — — — Settlements (1 ) — (39 ) (94 ) (60 ) (556 ) — (34 ) 526 5 FG VIE consolidations — — — — — — — — — — FG VIE deconsolidations — — 0 — — 0 — — 0 — Fair value as of June 30, 2016 $ 41 $ 58 $ 349 $ 564 $ — $ 814 $ 38 $ (396 ) $ (790 ) $ (115 ) Change in unrealized gains/(losses) related to financial instruments held as of June 30, 2016 $ 1 $ (17 ) $ (3 ) $ (10 ) $ — $ 15 $ (27 ) $ (99 ) $ 19 $ 3 Fair Value Level 3 Rollforward Recurring Basis Six Months 2015 Fixed-Maturity Securities Obligations Corporate Securities RMBS Asset- FG VIEs’ Other Credit FG VIEs' Liabilities FG VIEs’ Liabilities (in millions) Fair value as of December 31, 2014 $ 38 $ 79 $ 425 $ 228 $ 1,398 $ 37 $ (895 ) $ (1,277 ) $ (142 ) Radian Asset Acquisition — — 4 — 122 2 (215 ) (114 ) (4 ) Total pretax realized and unrealized gains/(losses) recorded in: (1) Net income (loss) 3 (2 ) (1 ) (2 ) 17 (2 ) 1 (2 ) 42 (3 ) 25 (4 ) 214 (6 ) 88 (3 ) (30 ) (3 ) Other comprehensive income (loss) (3 ) (1 ) (4 ) 9 — — — — — Purchases — — 10 — — — — — — Settlements (31 ) (7 ) — (116 ) (2 ) (70 ) 0 (30 ) 73 5 FG VIE consolidations — — (1 ) — 104 — — (131 ) — FG VIE deconsolidations — — — — — — — — — Fair value as of June 30, 2015 $ 7 $ 77 $ 335 $ 236 $ 1,596 $ 64 $ (926 ) $ (1,361 ) $ (171 ) Change in unrealized gains/(losses) related to financial instruments held as of June 30, 2015 $ 0 $ (1 ) $ (1 ) $ 9 $ 65 $ 25 $ 186 $ (12 ) $ (19 ) ____________________ (1) Realized and unrealized gains (losses) from changes in values of Level 3 financial instruments represent gains (losses) from changes in values of those financial instruments only for the periods in which the instruments were classified as Level 3. (2) Included in net realized investment gains (losses) and net investment income. (3) Included in fair value gains (losses) on FG VIEs. (4) Recorded in fair value gains (losses) on CCS, net investment income and other income. (5) Represents net position of credit derivatives. The consolidated balance sheet presents gross assets and liabilities based on net counterparty exposure. (6) Reported in net change in fair value of credit derivatives. (7) Primarily non-cash transaction. (8) Includes CCS and other invested assets.
Fair Value, Liabilities Measured on Recurring Basis	Fair Value Level 3 Rollforward Recurring Basis Second Quarter 2015 Fixed-Maturity Securities Obligations Corporate Securities RMBS Asset- FG VIEs’ Other Credit FG VIEs' Liabilities FG VIEs’ Liabilities (in millions) Fair value as of March 31, 2015 $ 8 $ 79 $ 383 $ 226 $ 1,495 $ 40 $ (782 ) $ (1,278 ) $ (145 ) Radian Asset Acquisition — — 4 — 122 2 (215 ) (114 ) (4 ) Total pretax realized and unrealized gains/(losses) recorded in: (1) Net income (loss) 0 (2 ) (3 ) (2 ) 8 (2 ) 3 (2 ) 19 (3 ) 23 (4 ) 90 (6 ) (5 ) (3 ) (25 ) (3 ) Other comprehensive income (loss) (1 ) 1 (9 ) 8 — (1 ) — — — Purchases — — 1 — — — — — — Settlements — (7 ) — (51 ) (1 ) (40 ) — (19 ) 36 3 FG VIE consolidations — — (1 ) — — — — — — FG VIE deconsolidations — — — — — — — — — Fair value as of June 30, 2015 $ 7 $ 77 $ 335 $ 236 $ 1,596 $ 64 $ (926 ) $ (1,361 ) $ (171 ) Change in unrealized gains/(losses) related to financial instruments held as of June 30, 2015 $ 0 $ 1 $ (7 ) $ 8 $ 31 $ 22 $ 82 $ (6 ) $ (14 ) Fair Value Level 3 Rollforward Recurring Basis Six Months 2016 Fixed-Maturity Securities Obligations Corporate Securities RMBS Asset- Short-Term Investments FG VIEs’ Other Credit FG VIEs' Liabilities FG VIEs’ Liabilities (in millions) Fair value as of December 31, 2015 $ 8 $ 71 $ 348 $ 657 $ 60 $ 1,261 $ 65 $ (365 ) $ (1,225 ) $ (124 ) Total pretax realized and unrealized gains/(losses) recorded in: (1) Net income (loss) 0 (2 ) 4 (2 ) 2 (2 ) 11 (2 ) 0 (2 ) 109 (3 ) (27 ) (4 ) 3 (6 ) (91 ) (3 ) 4 (3 ) Other comprehensive income (loss) 1 (17 ) (2 ) (10 ) 0 — 0 — — — Purchases 33 — 40 — — — — — — — Settlements (1 ) — (39 ) (94 ) (60 ) (556 ) — (34 ) 526 5 FG VIE consolidations — — — — — — — — — — FG VIE deconsolidations — — 0 — — 0 — — 0 — Fair value as of June 30, 2016 $ 41 $ 58 $ 349 $ 564 $ — $ 814 $ 38 $ (396 ) $ (790 ) $ (115 ) Change in unrealized gains/(losses) related to financial instruments held as of June 30, 2016 $ 1 $ (17 ) $ (3 ) $ (10 ) $ — $ 15 $ (27 ) $ (99 ) $ 19 $ 3 Fair Value Level 3 Rollforward Recurring Basis Six Months 2015 Fixed-Maturity Securities Obligations Corporate Securities RMBS Asset- FG VIEs’ Other Credit FG VIEs' Liabilities FG VIEs’ Liabilities (in millions) Fair value as of December 31, 2014 $ 38 $ 79 $ 425 $ 228 $ 1,398 $ 37 $ (895 ) $ (1,277 ) $ (142 ) Radian Asset Acquisition — — 4 — 122 2 (215 ) (114 ) (4 ) Total pretax realized and unrealized gains/(losses) recorded in: (1) Net income (loss) 3 (2 ) (1 ) (2 ) 17 (2 ) 1 (2 ) 42 (3 ) 25 (4 ) 214 (6 ) 88 (3 ) (30 ) (3 ) Other comprehensive income (loss) (3 ) (1 ) (4 ) 9 — — — — — Purchases — — 10 — — — — — — Settlements (31 ) (7 ) — (116 ) (2 ) (70 ) 0 (30 ) 73 5 FG VIE consolidations — — (1 ) — 104 — — (131 ) — FG VIE deconsolidations — — — — — — — — — Fair value as of June 30, 2015 $ 7 $ 77 $ 335 $ 236 $ 1,596 $ 64 $ (926 ) $ (1,361 ) $ (171 ) Change in unrealized gains/(losses) related to financial instruments held as of June 30, 2015 $ 0 $ (1 ) $ (1 ) $ 9 $ 65 $ 25 $ 186 $ (12 ) $ (19 ) ____________________ (1) Realized and unrealized gains (losses) from changes in values of Level 3 financial instruments represent gains (losses) from changes in values of those financial instruments only for the periods in which the instruments were classified as Level 3. (2) Included in net realized investment gains (losses) and net investment income. (3) Included in fair value gains (losses) on FG VIEs. (4) Recorded in fair value gains (losses) on CCS, net investment income and other income. (5) Represents net position of credit derivatives. The consolidated balance sheet presents gross assets and liabilities based on net counterparty exposure. (6) Reported in net change in fair value of credit derivatives. (7) Primarily non-cash transaction. (8) Includes CCS and other invested assets.
Schedule of Quantitative Information About Level 3 Assets, Fair Value Measurements	Quantitative Information About Level 3 Fair Value Inputs At June 30, 2016 Financial Instrument Description (1) Fair Value at June 30, 2016 (in millions) Significant Unobservable Inputs Range Weighted Average as a Percentage of Current Par Outstanding Assets (2): Fixed-maturity securities: Obligations of state and political subdivisions $ 41 Yield 4.3 % - 18.4% 13.2% Corporate securities 58 Yield 20.3% RMBS 349 CPR 1.6 % - 9.5% 3.3% CDR 0.1 % - 12.4% 9.4% Loss severity 50.0 % - 100.0% 75.2% Yield 4.8 % - 8.5% 6.0% Asset-backed securities: Triple-X life insurance transactions 321 Yield 4.3 % - 6.8% 5.1% Collateralized debt obligations ("CDO") 243 Yield 15.0% FG VIEs’ assets, at fair value 814 CPR 2.5 % - 8.0% 5.1% CDR 1.2 % - 16.3% 5.8% Loss severity 50.0 % - 100.0% 85.4% Yield 3.2 % - 21.5% 7.0% Other assets 35 Estimated pricing $59 - $61 $60 Term (years) 5 years Liabilities: Credit derivative liabilities, net (396 ) Year 1 loss estimates 0.0 % - 37.0% 0.9% Hedge cost (in bps) 11.3 - 198.8 39.1 Bank profit (in bps) 3.8 - 1,572.5 99.7 Internal floor (in bps) 7.0 - 100.0 27.9 Internal credit rating AAA - CCC AA FG VIEs’ liabilities, at fair value (905 ) CPR 2.5 % - 8.0% 5.1% CDR 1.2 % - 16.3% 5.8% Loss severity 50.0 % - 100.0% 85.4% Yield 3.2 % - 21.5% 5.8% ___________________ (1) Discounted cash flow is used as valuation technique for all financial instruments. (2) Excludes several investments recorded in other invested assets with fair value of $7 million . Quantitative Information About Level 3 Fair Value Inputs At December 31, 2015 Financial Instrument Description (1) Fair Value at Significant Unobservable Inputs Range Weighted Average as a Percentage of Current Par Outstanding Assets (2): Fixed-maturity securities (3): Corporate securities $ 71 Yield 21.8% RMBS 348 CPR 0.3 % - 9.0% 2.6% CDR 2.7 % - 9.3% 7.0% Loss severity 60.0 % - 100.0% 74.0% Yield 4.7 % - 8.2% 6.0% Asset-backed securities: Investor owned utility 69 Cash flow receipts 100.0% Collateral recovery period 2.9 years Discount factor 7.0% Triple-X life insurance transactions 329 Yield 3.5 % - 7.5% 5.0% CDO 259 Yield 20.0% Short-term investments 60 Yield 17.0% FG VIEs’ assets, at fair value 1,261 CPR 0.3 % - 9.2% 3.9% CDR 1.2 % - 16.0% 4.7% Loss severity 40.0 % - 100.0% 85.9% Yield 1.9 % - 20.0% 6.4% Other assets 62 Quotes from third party pricing $44 - $46 $45 Term (years) 5 years Liabilities: Credit derivative liabilities, net (365 ) Year 1 loss estimates 0.0 % - 41.0% 0.6% Hedge cost (in bps) 32.8 - 282.0 66.3 Bank profit (in bps) 3.8 - 1,017.5 110.8 Internal floor (in bps) 7.0 - 100.0 16.8 Internal credit rating AAA - CCC AA+ FG VIEs’ liabilities, at fair value (1,349 ) CPR 0.3 % - 9.2% 3.9% CDR 1.2 % - 16.0% 4.7% Loss severity 40.0 % - 100.0% 85.9% Yield 1.9 % - 20.0% 5.6% ____________________ (1) Discounted cash flow is used as valuation technique for all financial instruments. (2) Excludes several investments recorded in other invested assets with fair value of $7 million . (3) Excludes obligations of state and political subdivisions investments with fair value of $8 million .
Schedule of Quantitative Information About Level 3 Liabilities, Fair Value Measurements	Quantitative Information About Level 3 Fair Value Inputs At June 30, 2016 Financial Instrument Description (1) Fair Value at June 30, 2016 (in millions) Significant Unobservable Inputs Range Weighted Average as a Percentage of Current Par Outstanding Assets (2): Fixed-maturity securities: Obligations of state and political subdivisions $ 41 Yield 4.3 % - 18.4% 13.2% Corporate securities 58 Yield 20.3% RMBS 349 CPR 1.6 % - 9.5% 3.3% CDR 0.1 % - 12.4% 9.4% Loss severity 50.0 % - 100.0% 75.2% Yield 4.8 % - 8.5% 6.0% Asset-backed securities: Triple-X life insurance transactions 321 Yield 4.3 % - 6.8% 5.1% Collateralized debt obligations ("CDO") 243 Yield 15.0% FG VIEs’ assets, at fair value 814 CPR 2.5 % - 8.0% 5.1% CDR 1.2 % - 16.3% 5.8% Loss severity 50.0 % - 100.0% 85.4% Yield 3.2 % - 21.5% 7.0% Other assets 35 Estimated pricing $59 - $61 $60 Term (years) 5 years Liabilities: Credit derivative liabilities, net (396 ) Year 1 loss estimates 0.0 % - 37.0% 0.9% Hedge cost (in bps) 11.3 - 198.8 39.1 Bank profit (in bps) 3.8 - 1,572.5 99.7 Internal floor (in bps) 7.0 - 100.0 27.9 Internal credit rating AAA - CCC AA FG VIEs’ liabilities, at fair value (905 ) CPR 2.5 % - 8.0% 5.1% CDR 1.2 % - 16.3% 5.8% Loss severity 50.0 % - 100.0% 85.4% Yield 3.2 % - 21.5% 5.8% ___________________ (1) Discounted cash flow is used as valuation technique for all financial instruments. (2) Excludes several investments recorded in other invested assets with fair value of $7 million . Quantitative Information About Level 3 Fair Value Inputs At December 31, 2015 Financial Instrument Description (1) Fair Value at Significant Unobservable Inputs Range Weighted Average as a Percentage of Current Par Outstanding Assets (2): Fixed-maturity securities (3): Corporate securities $ 71 Yield 21.8% RMBS 348 CPR 0.3 % - 9.0% 2.6% CDR 2.7 % - 9.3% 7.0% Loss severity 60.0 % - 100.0% 74.0% Yield 4.7 % - 8.2% 6.0% Asset-backed securities: Investor owned utility 69 Cash flow receipts 100.0% Collateral recovery period 2.9 years Discount factor 7.0% Triple-X life insurance transactions 329 Yield 3.5 % - 7.5% 5.0% CDO 259 Yield 20.0% Short-term investments 60 Yield 17.0% FG VIEs’ assets, at fair value 1,261 CPR 0.3 % - 9.2% 3.9% CDR 1.2 % - 16.0% 4.7% Loss severity 40.0 % - 100.0% 85.9% Yield 1.9 % - 20.0% 6.4% Other assets 62 Quotes from third party pricing $44 - $46 $45 Term (years) 5 years Liabilities: Credit derivative liabilities, net (365 ) Year 1 loss estimates 0.0 % - 41.0% 0.6% Hedge cost (in bps) 32.8 - 282.0 66.3 Bank profit (in bps) 3.8 - 1,017.5 110.8 Internal floor (in bps) 7.0 - 100.0 16.8 Internal credit rating AAA - CCC AA+ FG VIEs’ liabilities, at fair value (1,349 ) CPR 0.3 % - 9.2% 3.9% CDR 1.2 % - 16.0% 4.7% Loss severity 40.0 % - 100.0% 85.9% Yield 1.9 % - 20.0% 5.6% ____________________ (1) Discounted cash flow is used as valuation technique for all financial instruments. (2) Excludes several investments recorded in other invested assets with fair value of $7 million . (3) Excludes obligations of state and political subdivisions investments with fair value of $8 million .
Fair Value of Financial Instruments	Fair Value of Financial Instruments As of As of Carrying Amount Estimated Fair Value Carrying Amount Estimated Fair Value (in millions) Assets: Fixed-maturity securities $ 9,960 $ 9,960 $ 10,627 $ 10,627 Short-term investments 585 585 396 396 Other invested assets (1) 155 157 150 152 Credit derivative assets 36 36 81 81 FG VIEs’ assets, at fair value 814 814 1,261 1,261 Other assets 187 187 206 206 Liabilities: Financial guaranty insurance contracts (2) 3,690 9,928 3,998 8,712 Long-term debt 1,303 1,527 1,300 1,512 Credit derivative liabilities 432 432 446 446 FG VIEs’ liabilities with recourse, at fair value 790 790 1,225 1,225 FG VIEs’ liabilities without recourse, at fair value 115 115 124 124 Other liabilities 7 7 9 9 ____________________ (1) Includes investments not carried at fair value with a carrying value of $96 million and $93 million as of June 30, 2016 and December 31, 2015 , respectively. Excludes investments carried under the equity method. (2) Carrying amount includes the assets and liabilities related to financial guaranty insurance contract premiums, losses, and salvage and subrogation and other recoverables net of reinsurance.

Financial Guaranty Contracts 33

Financial Guaranty Contracts Accounted for as Credit Derivatives (Tables)	6 Months Ended
	Jun. 30, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Credit Derivatives Subordination and Ratings and Net Par Outstanding by Internal Rating	Distribution of Credit Derivative Net Par Outstanding by Internal Rating As of June 30, 2016 As of December 31, 2015 Ratings Net Par Outstanding % of Total Net Par Outstanding % of Total (dollars in millions) AAA $ 10,966 54.8 % $ 14,808 57.9 % AA 4,137 20.7 4,821 18.8 A 2,067 10.3 2,144 8.4 BBB 1,758 8.8 2,212 8.6 BIG 1,086 5.4 1,609 6.3 Credit derivative net par outstanding $ 20,014 100.0 % $ 25,594 100.0 % Credit Derivatives Subordination and Ratings As of June 30, 2016 As of December 31, 2015 Asset Type Net Par Outstanding Original Subordination(1) Current Subordination(1) Weighted Average Credit Rating Net Par Outstanding Original Subordination(1) Current Subordination(1) Weighted Average Credit Rating (dollars in millions) Pooled corporate obligations: Collateralized loan obligation/collateral bond obligations $ 3,006 29.7 % 55.8 % AAA $ 5,873 30.9 % 42.3 % AAA Synthetic investment grade pooled corporate 7,116 21.7 19.4 AAA 7,108 21.7 19.4 AAA TruPS CDOs 2,531 45.3 44.0 A- 3,429 45.8 42.6 A- Market value CDOs of corporate obligations — — — -- 1,113 17.0 30.1 AAA Total pooled corporate obligations 12,653 28.3 33.0 AAA 17,523 29.2 32.3 AAA U.S. RMBS: Option ARM and Alt-A first lien 289 9.5 13.1 AA- 351 10.5 12.7 AA- Subprime first lien 925 27.7 45.3 AA 981 27.7 45.2 AA Prime first lien — — — -- 177 10.9 0.0 BB Closed-end second lien 15 — — CCC 17 — — CCC Total U.S. RMBS 1,229 25.1 40.7 AA 1,526 24.1 37.4 A+ CMBS 384 44.8 58.4 AAA 530 44.8 52.6 AAA Other 5,748 — — A 6,015 — — A Total $ 20,014 AA $ 25,594 AA+ ____________________ (1) Represents the sum of subordinate tranches and over-collateralization and does not include any benefit from excess interest collections that may be used to absorb losses.
Net Change in Fair Value of Credit Derivatives	Net Change in Fair Value of Credit Derivatives Gain (Loss) Second Quarter Six Months 2016 2015 2016 2015 (in millions) Realized gains on credit derivatives $ 18 $ 15 $ 28 $ 38 Net credit derivative losses (paid and payable) recovered and recoverable and other settlements 6 (7 ) 4 (9 ) Realized gains (losses) and other settlements 24 8 32 29 Net unrealized gains (losses): Pooled corporate obligations 8 7 (40 ) 24 U.S. RMBS 27 62 12 137 CMBS 0 4 0 4 Other 4 9 (1 ) 20 Net unrealized gains (losses) 39 82 (29 ) 185 Net change in fair value of credit derivatives $ 63 $ 90 $ 3 $ 214
Par and Accelerations From Termination of CDS Contracts	Net Par and Realized Gains from Terminations and Settlements of Credit Derivative Contracts Second Quarter Six Months 2016 2015 2016 2015 (in millions) Net par of terminated credit derivative contracts $ 2,436 $ 471 $ 2,436 $ 564 Realized gains on credit derivatives 8 2 8 13 Net unrealized gains (losses) on credit derivatives 59 0 70 (1 )
CDS Spread on AGC and AGM	CDS Spread on AGC and AGM Quoted price of CDS contract (in basis points) As of As of As of As of As of As of Five-year CDS spread: AGC 265 307 376 390 317 323 AGM 265 309 366 410 341 325 One-year CDS spread AGC 45 105 139 120 60 80 AGM 47 102 131 125 80 85
Fair Value of Credit Derivatives and Effect of AGC and AGM Credit Spreads	Fair Value of Credit Derivatives Assets (Liabilities) and Effect of AGC and AGM Credit Spreads As of As of (in millions) Fair value of credit derivatives before effect of AGC and AGM credit spreads $ (1,170 ) $ (1,448 ) Plus: Effect of AGC and AGM credit spreads 774 1,083 Net fair value of credit derivatives $ (396 ) $ (365 )
Net Fair Value and Expected Losses of Credit Derivatives by Sector	Net Fair Value and Expected Losses of Credit Derivatives by Sector Fair Value of Credit Derivative Asset (Liability), net Expected Loss to be (Paid) Recovered Asset Type As of As of As of As of (in millions) Pooled corporate obligations $ (124 ) $ (82 ) $ (4 ) $ (5 ) U.S. RMBS (86 ) (98 ) (29 ) (38 ) Other (186 ) (185 ) 29 27 Total $ (396 ) $ (365 ) $ (4 ) $ (16 )
Effects of Changes in Credit Spread	Effect of Changes in Credit Spread As of June 30, 2016 Credit Spreads(1) Estimated Net Fair Value (Pre-Tax) Estimated Change in Gain/(Loss) (Pre-Tax) (in millions) 100% widening in spreads $ (805 ) $ (409 ) 50% widening in spreads (601 ) (205 ) 25% widening in spreads (499 ) (103 ) 10% widening in spreads (437 ) (41 ) Base Scenario (396 ) — 10% narrowing in spreads (358 ) 38 25% narrowing in spreads (301 ) 95 50% narrowing in spreads (206 ) 190 ____________________ (1) Includes the effects of spreads on both the underlying asset classes and the Company’s own credit spread.

Consolidated Variable Interes34

Consolidated Variable Interest Entities (Tables)	6 Months Ended
	Jun. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Consolidated FG VIE's	Consolidated FG VIEs By Type of Collateral As of June 30, 2016 As of December 31, 2015 Assets Liabilities Assets Liabilities (in millions) With recourse: U.S. RMBS first lien $ 442 $ 477 $ 506 $ 521 U.S. RMBS second lien 174 235 194 273 Life insurance — — 347 347 Manufactured housing 78 78 84 84 Total with recourse 694 790 1,131 1,225 Without recourse 120 115 130 124 Total $ 814 $ 905 $ 1,261 $ 1,349 Effect of Consolidating FG VIEs on Net Income, Cash Flows From Operating Activities and Shareholders' Equity Second Quarter Six Months 2016 2015 2016 2015 (in millions) Net earned premiums $ (3 ) $ (5 ) $ (8 ) $ (10 ) Net investment income (2 ) (3 ) (7 ) (6 ) Net realized investment gains (losses) 0 3 1 3 Fair value gains (losses) on FG VIEs 4 5 22 (2 ) Bargain purchase gain — 2 — 2 Loss and LAE (2 ) 2 4 7 Effect on income before tax (3 ) 4 12 (6 ) Less: tax provision (benefit) (1 ) 1 4 (3 ) Effect on net income (loss) $ (2 ) $ 3 $ 8 $ (3 ) Effect on cash flows from operating activities $ (1 ) $ 15 $ 5 $ 33 As of As of (in millions) Effect on shareholders' equity (decrease) increase $ (12 ) $ (23 ) Number of FG VIEs Consolidated Six Months 2016 2015 Beginning of the period, December 31 34 32 Radian Asset Acquisition — 4 Consolidated (1) — 1 Deconsolidated (1) (1 ) — Matured (1 ) — End of the period, June 30 32 37 ____________________ (1) Net loss on deconsolidation was de minimis in Six Months 2016 , and net loss on consolidation was $26 million in Six Months 2015 , and recorded in “fair value gains (losses) on FG VIEs” in the consolidated statement of operations.

Investments and Cash (Tables)

Investments and Cash (Tables)	6 Months Ended
	Jun. 30, 2016
Investments, Debt and Equity Securities [Abstract]
Net Investment Income	Net Investment Income Second Quarter Six Months 2016 2015 2016 2015 (in millions) Income from fixed-maturity securities managed by third parties $ 77 $ 85 $ 156 $ 167 Income from internally managed securities: Fixed maturities 22 14 39 29 Other 1 1 6 7 Gross investment income 100 100 201 203 Investment expenses (2 ) (2 ) (4 ) (4 ) Net investment income $ 98 $ 98 $ 197 $ 199
Net Realized Investment Gains (Losses)	Net Realized Investment Gains (Losses) Second Quarter Six Months 2016 2015 2016 2015 (in millions) Gross realized gains on available-for-sale securities $ 14 $ 8 $ 20 $ 32 Gross realized losses on available-for-sale securities 0 (6 ) (2 ) (7 ) Net realized gains (losses) on other invested assets 1 1 0 1 Other-than-temporary impairment (5 ) (12 ) (21 ) (19 ) Net realized investment gains (losses) $ 10 $ (9 ) $ (3 ) $ 7
Roll Forward of Credit Losses in the Investment Portfolio	Roll Forward of Credit Losses in the Investment Portfolio Second Quarter Six Months 2016 2015 2016 2015 (in millions) Balance, beginning of period $ 107 $ 106 $ 108 $ 124 Additions for credit losses on securities for which an other-than-temporary-impairment was not previously recognized 0 0 2 0 Reductions for securities sold and other settlement during the period (2 ) (7 ) (4 ) (28 ) Additions for credit losses on securities for which an other-than-temporary-impairment was previously recognized 3 5 2 8 Balance, end of period $ 108 $ 104 $ 108 $ 104
Fixed Maturity Securities and Short Term Investments by Security Type	Fixed-Maturity Securities and Short-Term Investments by Security Type As of June 30, 2016 Investment Category Percent of Total(1) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value AOCI(2) Gain (Loss) on Securities with Other-Than-Temporary Impairment Weighted Average Credit Rating (3) (dollars in millions) Fixed-maturity securities: Obligations of state and political subdivisions 52 % $ 5,143 $ 461 $ (1 ) $ 5,603 $ 17 AA- U.S. government and agencies 3 299 27 0 326 — AA+ Corporate securities 14 1,402 79 (38 ) 1,443 (29 ) A- Mortgage-backed securities(4): 0 RMBS 10 1,037 44 (19 ) 1,062 (9 ) A CMBS 5 505 34 0 539 — AAA Asset-backed securities 7 745 2 (17 ) 730 (15 ) B+ Foreign government securities 3 270 5 (18 ) 257 — AA Total fixed-maturity securities 94 9,401 652 (93 ) 9,960 (36 ) A+ Short-term investments 6 585 0 0 585 — AAA Total investment portfolio 100 % $ 9,986 $ 652 $ (93 ) $ 10,545 $ (36 ) A+ Fixed-Maturity Securities and Short-Term Investments by Security Type As of December 31, 2015 Investment Category Percent of Total(1) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value AOCI Gain (Loss) on Securities with Other-Than-Temporary Impairment Weighted Average Credit Rating (3) (dollars in millions) Fixed-maturity securities: Obligations of state and political subdivisions 52 % $ 5,528 $ 323 $ (10 ) $ 5,841 $ 5 AA U.S. government and agencies 3 377 23 0 400 — AA+ Corporate securities 14 1,505 38 (23 ) 1,520 (13 ) A- Mortgage-backed securities(4): RMBS 11 1,238 29 (22 ) 1,245 (7 ) A CMBS 5 506 9 (2 ) 513 — AAA Asset-backed securities 8 831 4 (10 ) 825 (6 ) B+ Foreign government securities 3 290 4 (11 ) 283 — AA+ Total fixed-maturity securities 96 10,275 430 (78 ) 10,627 (21 ) A+ Short-term investments 4 396 0 0 396 — AA- Total investment portfolio 100 % $ 10,671 $ 430 $ (78 ) $ 11,023 $ (21 ) A+ ____________________ (1) Based on amortized cost. (2) Accumulated OCI. See also Note 17, Shareholders' Equity for additional information as applicable. (3) Ratings in the tables above represent the lower of the Moody’s and S&P classifications except for bonds purchased for loss mitigation or risk management strategies, which use internal ratings classifications. The Company’s portfolio consists primarily of high-quality, liquid instruments. (4) Government-agency obligations were approximately 47% of mortgage backed securities as of June 30, 2016 and 54% as of December 31, 2015 based on fair value.
Fixed Maturity Securities Gross Unrealized Loss by Length of Time	Fixed-Maturity Securities Gross Unrealized Loss by Length of Time As of June 30, 2016 Less than 12 months 12 months or more Total Fair Value Unrealized Loss Fair Unrealized Fair Unrealized (dollars in millions) Obligations of state and political subdivisions $ 25 $ 0 $ 10 $ (1 ) $ 35 $ (1 ) U.S. government and agencies 10 0 — — 10 0 Corporate securities 54 (5 ) 81 (33 ) 135 (38 ) Mortgage-backed securities: RMBS 47 (5 ) 115 (14 ) 162 (19 ) CMBS 7 0 — — 7 0 Asset-backed securities 543 (17 ) — — 543 (17 ) Foreign government securities 84 (9 ) 52 (9 ) 136 (18 ) Total $ 770 $ (36 ) $ 258 $ (57 ) $ 1,028 $ (93 ) Number of securities (1) 68 53 113 Number of securities with other-than-temporary impairment (1) 8 7 14 Fixed-Maturity Securities Gross Unrealized Loss by Length of Time As of December 31, 2015 Less than 12 months 12 months or more Total Fair Unrealized Fair Unrealized Fair Unrealized (dollars in millions) Obligations of state and political subdivisions $ 316 $ (10 ) $ 7 $ 0 $ 323 $ (10 ) U.S. government and agencies 77 0 — — 77 0 Corporate securities 381 (8 ) 95 (15 ) 476 (23 ) Mortgage-backed securities: RMBS 438 (8 ) 90 (14 ) 528 (22 ) CMBS 140 (2 ) 2 0 142 (2 ) Asset-backed securities 517 (10 ) — — 517 (10 ) Foreign government securities 97 (4 ) 82 (7 ) 179 (11 ) Total $ 1,966 $ (42 ) $ 276 $ (36 ) $ 2,242 $ (78 ) Number of securities (1) 335 71 396 Number of securities with other-than-temporary impairment 9 4 13 ___________________ (1) The number of securities does not add across because lots consisting of the same securities have been purchased at different times and appear in both categories above (i.e., less than 12 months and 12 months or more). If a security appears in both categories, it is counted only once in the total column.
Distribution of Fixed Maturity Securities by Contractual Maturity	Distribution of Fixed-Maturity Securities by Contractual Maturity As of June 30, 2016 Amortized Cost Estimated Fair Value (in millions) Due within one year $ 482 $ 484 Due after one year through five years 1,484 1,536 Due after five years through 10 years 1,926 2,066 Due after 10 years 3,967 4,273 Mortgage-backed securities: RMBS 1,037 1,062 CMBS 505 539 Total $ 9,401 $ 9,960
Internally Managed Investment Portfolio	Internally Managed Portfolio Carrying Value As of As of (in millions) Assets purchased for loss mitigation and other risk management purposes: Fixed-maturity securities, at fair value $ 1,208 $ 1,266 Other invested assets 113 114 Other 58 55 Total $ 1,379 $ 1,435

Insurance Company Regulatory 36

Insurance Company Regulatory Requirements (Tables)	6 Months Ended
	Jun. 30, 2016
Insurance Company Regulatory Requirements [Abstract]
Schedule of Dividends Paid by Insurance Company Subsidiaries	Dividends and Surplus Notes By Insurance Company Subsidiaries Second Quarter Six Months 2016 2015 2016 2015 (in millions) Dividends paid by AGC to AGUS $ 23 $ 15 $ 23 $ 35 Dividends paid by AGM to AGMH 32 40 127 106 Dividends paid by AG Re to AGL 25 35 50 85 Repayment of surplus note by AGM to AGMH — — — 25 Repayment of surplus note by MAC to AGM 100 — 100 — Repayment of surplus note by MAC to MAC Holdings (1) 300 — 300 — ____________________ (1) MAC Holdings returned $300 million to AGM and AGC, in proportion to their ownership percentages, in Second Quarter 2016.

Income Taxes (Tables)

Income Taxes (Tables)	6 Months Ended
	Jun. 30, 2016
Income Tax Disclosure [Abstract]
Effective Tax Rate Reconciliation	Effective Tax Rate Reconciliation Second Quarter Six Months 2016 2015 2016 2015 (in millions) Expected tax provision (benefit) at statutory rates in taxable jurisdictions $ 66 $ 143 $ 84 $ 220 Tax-exempt interest (13 ) (13 ) (26 ) (27 ) Gain on bargain purchase — (19 ) — (19 ) Change in liability for uncertain tax positions 1 1 2 2 Other 1 0 1 1 Total provision (benefit) for income taxes $ 55 $ 112 $ 61 $ 177 Effective tax rate 26.9 % 27.5 % 22.8 % 26.2 %
Pretax Income (Loss) by Tax Jurisdiction	Pretax Income (Loss) by Tax Jurisdiction Second Quarter Six Months 2016 2015 2016 2015 (in millions) United States $ 194 $ 414 $ 249 $ 637 Bermuda 15 5 32 55 U.K. (8 ) (10 ) (15 ) (17 ) Total $ 201 $ 409 $ 266 $ 675
Revenue by Tax Jurisdiction	Revenue by Tax Jurisdiction Second Quarter Six Months 2016 2015 2016 2015 (in millions) United States $ 337 $ 618 $ 542 $ 918 Bermuda 59 78 101 151 U.K. 0 (1 ) (2 ) (5 ) Total $ 396 $ 695 $ 641 $ 1,064

Reinsurance and Other Monolin38

Reinsurance and Other Monoline Exposures (Tables)	6 Months Ended
	Jun. 30, 2016
Insurance [Abstract]
Effects of Reinsurance on Statement of Operations	Effect of Reinsurance on Statement of Operations Second Quarter Six Months 2016 2015 2016 2015 (in millions) Premiums Written: Direct $ 42 $ 23 $ 63 $ 52 Assumed (1) (6 ) (1 ) (8 ) 2 Ceded 0 2 (17 ) 2 Net $ 36 $ 24 $ 38 $ 56 Premiums Earned: Direct $ 220 $ 224 $ 410 $ 372 Assumed 5 12 13 22 Ceded (11 ) (17 ) (26 ) (33 ) Net $ 214 $ 219 $ 397 $ 361 Loss and LAE: Direct $ 101 $ 186 $ 210 $ 212 Assumed 11 19 (3 ) 12 Ceded (10 ) (17 ) (15 ) (18 ) Net $ 102 $ 188 $ 192 $ 206 ____________________ (1) Negative assumed premiums written were due to changes in expected debt service schedules.
Exposure by Reinsurer	Ratings at Par Outstanding (1) August 1, 2016 As of June 30, 2016 Reinsurer Moody’s Reinsurer Rating S&P Reinsurer Rating Ceded Par Outstanding Second-to- Pay Insured Par Outstanding Assumed Par Outstanding (dollars in millions) American Overseas Reinsurance Company Limited (2) WR (3) WR $ 4,511 $ — $ 30 Tokio Marine & Nichido Fire Insurance Co., Ltd. (2) Aa3 (4) A+ (4) 3,887 — — Syncora (2) WR WR 2,269 1,184 662 Mitsui Sumitomo Insurance Co. Ltd. (2) A1 A+ (4) 1,513 — — ACA Financial Guaranty Corp. NR (5) WR 657 33 — Ambac WR WR 115 3,541 8,862 National (6) A3 AA- — 4,967 4,960 MBIA (7) (7) — 1,357 414 FGIC (8) (8) — 1,341 593 Ambac Assurance Corp. Segregated Account NR NR — 81 645 CIFG (9) WR WR — 43 2,488 Other (2) Various Various 72 715 126 Total $ 13,024 $ 13,262 $ 18,780 ____________________ (1) Includes par related to insured credit derivatives. (2) The total collateral posted by all non-affiliated reinsurers required or agreeing to post collateral as of June 30, 2016 was approximately $438 million . (3) Represents “Withdrawn Rating.” (4) The Company benefits from trust arrangements that satisfy the triple-A credit requirement of S&P and/or Moody’s. (5) Represents “Not Rated.” (6) Rated AA+ by KBRA. (7) MBIA includes subsidiaries MBIA Insurance Corp. rated CCC by S&P and Caa1 by Moody's and MBIA U.K. Insurance Ltd. rated BB by S&P and Ba2 by Moody’s. (8) FGIC includes subsidiaries Financial Guaranty Insurance Company and FGIC UK Limited both of which had their ratings withdrawn by rating agencies. (9) On July 1, 2016, AGC acquired all of the issued and outstanding capital stock of CIFG Holding Inc., the parent of financial guaranty insurer CIFG. On July 5, 2016, CIFG merged with and into AGC, with AGC as the surviving company.
Amounts Due (To) From Reinsurers	Amounts Due (To) From Reinsurers As of June 30, 2016 Assumed Premium, net of Commissions Ceded Premium, net of Commissions Assumed Ceded (in millions) American Overseas Reinsurance Company Limited $ — $ (5 ) $ — $ 29 Tokio Marine & Nichido Fire Insurance Co., Ltd. — (11 ) — 46 Syncora 13 (20 ) — 8 Mitsui Sumitomo Insurance Co. Ltd. — (2 ) — 19 Ambac 36 — (3 ) — National 6 — (6 ) — MBIA 4 — (9 ) — FGIC 4 — (17 ) — Ambac Assurance Corp. Segregated Account 7 — (45 ) — CIFG (1) — — (71 ) — Other — (12 ) — 0 Total $ 70 $ (50 ) $ (151 ) $ 102 ____________________ (1) On July 1, 2016, AGC acquired all of the issued and outstanding capital stock of CIFG Holding Inc., the parent of financial guaranty insurer CIFG. On July 5, 2016, CIFG merged with and into AGC, with AGC as the surviving company. See Note 2, Acquisitions, for additional information

Long-Term Debt and Credit Fac39

Long-Term Debt and Credit Facilities (Tables)	6 Months Ended
	Jun. 30, 2016
Debt Disclosure [Abstract]
Principal and Carrying Amounts of Debt	The principal and carrying values of the Company’s long-term debt are presented in the table below. Principal and Carrying Amounts of Debt As of June 30, 2016 As of December 31, 2015 Principal Carrying Value Principal Carrying Value (in millions) AGUS: 7% Senior Notes $ 200 $ 197 $ 200 $ 197 5% Senior Notes 500 495 500 495 Series A Enhanced Junior Subordinated Debentures 150 150 150 150 Total AGUS 850 842 850 842 AGMH: 6 7 / 8 % QUIBS 100 69 100 69 6.25% Notes 230 140 230 140 5.6% Notes 100 56 100 56 Junior Subordinated Debentures 300 184 300 180 Total AGMH 730 449 730 445 AGM: Notes Payable 11 12 12 13 Total AGM 11 12 12 13 Total $ 1,591 $ 1,303 $ 1,592 $ 1,300

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2016
Earnings Per Share [Abstract]
Schedule of computation of basic and diluted earnings per share	Computation of Earnings Per Share Second Quarter Six Months 2016 2015 2016 2015 (in millions) Basic earnings per share ("EPS"): Net income (loss) attributable to AGL $ 146 $ 297 $ 205 $ 498 Less: Distributed and undistributed income (loss) available to nonvested shareholders 0 0 0 0 Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries, basic $ 146 $ 297 $ 205 $ 498 Basic shares 134.0 150.6 135.1 153.2 Basic EPS $ 1.09 $ 1.97 $ 1.52 $ 3.25 Diluted EPS: Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries, basic $ 146 $ 297 $ 205 $ 498 Plus: Re-allocation of undistributed income (loss) available to nonvested shareholders of AGL and subsidiaries 0 0 0 0 Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries, diluted $ 146 $ 297 $ 205 $ 498 Basic shares 134.0 150.6 135.1 153.2 Dilutive securities: Options and restricted stock awards 0.8 1.0 0.8 0.9 Diluted shares 134.8 151.6 135.9 154.1 Diluted EPS $ 1.09 $ 1.96 $ 1.51 $ 3.23 Potentially dilutive securities excluded from computation of EPS because of antidilutive effect 0.6 0.1 0.7 0.4
Schedule of antidilutive securities excluded from computation of earnings per share	Computation of Earnings Per Share Second Quarter Six Months 2016 2015 2016 2015 (in millions) Basic earnings per share ("EPS"): Net income (loss) attributable to AGL $ 146 $ 297 $ 205 $ 498 Less: Distributed and undistributed income (loss) available to nonvested shareholders 0 0 0 0 Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries, basic $ 146 $ 297 $ 205 $ 498 Basic shares 134.0 150.6 135.1 153.2 Basic EPS $ 1.09 $ 1.97 $ 1.52 $ 3.25 Diluted EPS: Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries, basic $ 146 $ 297 $ 205 $ 498 Plus: Re-allocation of undistributed income (loss) available to nonvested shareholders of AGL and subsidiaries 0 0 0 0 Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries, diluted $ 146 $ 297 $ 205 $ 498 Basic shares 134.0 150.6 135.1 153.2 Dilutive securities: Options and restricted stock awards 0.8 1.0 0.8 0.9 Diluted shares 134.8 151.6 135.9 154.1 Diluted EPS $ 1.09 $ 1.96 $ 1.51 $ 3.23 Potentially dilutive securities excluded from computation of EPS because of antidilutive effect 0.6 0.1 0.7 0.4

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	6 Months Ended
	Jun. 30, 2016
Equity [Abstract]
Changes in Accumulated Other Comprehensive Income by Component	The following tables present the changes in each component of AOCI and the effect of reclassifications out of AOCI on the respective line items in net income. Changes in Accumulated Other Comprehensive Income by Component Second Quarter 2016 Net Unrealized Gains (Losses) on Investments with no Other-Than-Temporary Impairment Net Unrealized Gains (Losses) on Investments with Other-Than-Temporary Impairment Cumulative Translation Adjustment Cash Flow Hedge Total Accumulated Other Comprehensive Income (in millions) Balance, March 31, 2016 $ 350 $ (21 ) $ (18 ) $ 8 $ 319 Other comprehensive income (loss) before reclassifications 84 (6 ) (8 ) — 70 Amounts reclassified from AOCI to: Net realized investment gains (losses) (13 ) 4 — — (9 ) Net investment income — — — — — Interest expense — — — (1 ) (1 ) Total before tax (13 ) 4 — (1 ) (10 ) Tax (provision) benefit 5 (1 ) — 0 4 Total amount reclassified from AOCI, net of tax (8 ) 3 — (1 ) (6 ) Net current period other comprehensive income (loss) 76 (3 ) (8 ) (1 ) 64 Balance, June 30, 2016 $ 426 $ (24 ) $ (26 ) $ 7 $ 383 Changes in Accumulated Other Comprehensive Income by Component Second Quarter 2015 Net Unrealized Gains (Losses) on Investments with no Other-Than-Temporary Impairment Net Unrealized Gains (Losses) on Investments with Other-Than-Temporary Impairment Cumulative Translation Adjustment Cash Flow Hedge Total Accumulated Other Comprehensive Income (in millions) Balance, March 31, 2015 $ 372 $ 5 $ (15 ) $ 8 $ 370 Other comprehensive income (loss) before reclassifications (136 ) (6 ) 6 — (136 ) Amounts reclassified from AOCI to: Net realized investment gains (losses) 1 8 — — 9 Interest expense — — — 0 0 Total before tax 1 8 — 0 9 Tax (provision) benefit (1 ) (3 ) — 0 (4 ) Total amount reclassified from AOCI, net of tax 0 5 — 0 5 Net current period other comprehensive income (loss) (136 ) (1 ) 6 0 (131 ) Balance, June 30, 2015 $ 236 $ 4 $ (9 ) $ 8 $ 239 Changes in Accumulated Other Comprehensive Income by Component Six Months 2016 Net Unrealized Gains (Losses) on Investments with no Other-Than-Temporary Impairment Net Unrealized Gains (Losses) on Investments with Other-Than-Temporary Impairment Cumulative Translation Adjustment Cash Flow Hedge Total Accumulated Other Comprehensive Income (in millions) Balance, December 31, 2015 $ 260 $ (15 ) $ (16 ) $ 8 $ 237 Other comprehensive income (loss) before reclassifications 179 (23 ) (10 ) — 146 Amounts reclassified from AOCI to: Net realized investment gains (losses) (17 ) 21 — — 4 Net investment income (3 ) — — — (3 ) Interest expense — — — (1 ) (1 ) Total before tax (20 ) 21 — (1 ) 0 Tax (provision) benefit 7 (7 ) — 0 0 Total amount reclassified from AOCI, net of tax (13 ) 14 — (1 ) 0 Net current period other comprehensive income (loss) 166 (9 ) (10 ) (1 ) 146 Balance, June 30, 2016 $ 426 $ (24 ) $ (26 ) $ 7 $ 383 Changes in Accumulated Other Comprehensive Income by Component Six Months 2015 Net Unrealized Gains (Losses) on Investments with no Other-Than-Temporary Impairment Net Unrealized Gains (Losses) on Investments with Other-Than-Temporary Impairment Cumulative Translation Adjustment Cash Flow Hedge Total Accumulated Other Comprehensive Income (in millions) Balance, December 31, 2014 $ 367 $ 4 $ (10 ) $ 9 $ 370 Other comprehensive income (loss) before reclassifications (118 ) (8 ) 1 — (125 ) Amounts reclassified from AOCI to: Net realized investment gains (losses) (19 ) 12 — — (7 ) Interest expense — — — (1 ) (1 ) Total before tax (19 ) 12 — (1 ) (8 ) Tax (provision) benefit 6 (4 ) — 0 2 Total amount reclassified from AOCI, net of tax (13 ) 8 — (1 ) (6 ) Net current period other comprehensive income (loss) (131 ) 0 1 (1 ) (131 ) Balance, June 30, 2015 $ 236 $ 4 $ (9 ) $ 8 $ 239
Schedule of Share Repurchases	Share Repurchases Period Number of Shares Repurchased Total Payments(in millions) Average Price Paid Per Share 2013 12,512,759 $ 264 $ 21.12 2014 24,413,781 590 24.17 2015 (January 1 - March 31) 5,860,291 152 25.87 2015 (April 1 - June 30) 4,737,388 133 28.13 2015 (July 1 - September 30) 5,362,103 135 25.17 2015 (October 1 - December 31) 5,035,637 135 26.81 Total 2015 20,995,419 555 26.43 2016 (January 1 - March 31) 3,038,928 75 24.69 2016 (April 1 - June 30) 2,331,474 60 25.73 Total 2016 (through June 30) 5,370,402 135 25.14 2016 (July 1 - through August 3, 2016) 772,635 20 25.89 Total 2016 6,143,037 155 25.24 Cumulative repurchases since the beginning of 2013 64,064,996 $ 1,564 $ 24.42

Subsidiary Information (Tables)

Subsidiary Information (Tables)	6 Months Ended
	Jun. 30, 2016
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Consolidating Balance Sheet	CONDENSED CONSOLIDATING BALANCE SHEET AS OF JUNE 30, 2016 (in millions) Assured Guaranty Ltd. (Parent) AGUS (Issuer) AGMH (Issuer) Other Entities Consolidating Adjustments Assured Guaranty Ltd. (Consolidated) ASSETS Total investment portfolio and cash $ 42 $ 85 $ 20 $ 11,113 $ (355 ) $ 10,905 Investment in subsidiaries 6,173 5,705 4,167 284 (16,329 ) — Premiums receivable, net of commissions payable — — — 748 (125 ) 623 Ceded unearned premium reserve — — — 1,189 (961 ) 228 Deferred acquisition costs — — — 167 (57 ) 110 Reinsurance recoverable on unpaid losses — — — 532 (450 ) 82 Credit derivative assets — — — 144 (108 ) 36 Deferred tax asset, net — 29 — 335 (129 ) 235 Intercompany receivable — — — 90 (90 ) — Financial guaranty variable interest entities’ assets, at fair value — — — 814 — 814 Funds restricted for CIFG acquisition — — — 451 — 451 Other 39 63 35 756 (285 ) 608 TOTAL ASSETS $ 6,254 $ 5,882 $ 4,222 $ 16,623 $ (18,889 ) $ 14,092 LIABILITIES AND SHAREHOLDERS’ EQUITY Unearned premium reserves $ — $ — $ — $ 4,675 $ (1,058 ) $ 3,617 Loss and LAE reserve — — — 1,790 (522 ) 1,268 Long-term debt — 842 449 12 — 1,303 Intercompany payable — 90 — 300 (390 ) — Credit derivative liabilities — — — 540 (108 ) 432 Deferred tax liabilities, net — — 90 — (90 ) — Financial guaranty variable interest entities’ liabilities, at fair value — — — 905 — 905 Other 4 15 14 692 (408 ) 317 TOTAL LIABILITIES 4 947 553 8,914 (2,576 ) 7,842 TOTAL SHAREHOLDERS’ EQUITY ATTRIBUTABLE TO ASSURED GUARANTY LTD. 6,250 4,935 3,669 7,425 (16,029 ) 6,250 Noncontrolling interest — — — 284 (284 ) — TOTAL SHAREHOLDERS' EQUITY 6,250 4,935 3,669 7,709 (16,313 ) 6,250 TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY $ 6,254 $ 5,882 $ 4,222 $ 16,623 $ (18,889 ) $ 14,092 CONDENSED CONSOLIDATING BALANCE SHEET AS OF DECEMBER 31, 2015 (in millions) Assured Guaranty Ltd. (Parent) AGUS (Issuer) AGMH (Issuer) Other Entities Consolidating Adjustments Assured Guaranty Ltd. (Consolidated) ASSETS Total investment portfolio and cash $ 10 $ 156 $ 22 $ 11,530 $ (360 ) $ 11,358 Investment in subsidiaries 5,961 5,569 4,081 377 (15,988 ) — Premiums receivable, net of commissions payable — — — 833 (140 ) 693 Ceded unearned premium reserve — — — 1,266 (1,034 ) 232 Deferred acquisition costs — — — 176 (62 ) 114 Reinsurance recoverable on unpaid losses — — — 467 (398 ) 69 Credit derivative assets — — — 207 (126 ) 81 Deferred tax asset, net — 52 — 357 (133 ) 276 Intercompany receivable — — — 90 (90 ) — Financial guaranty variable interest entities’ assets, at fair value — — — 1,261 — 1,261 Other 98 29 26 571 (264 ) 460 TOTAL ASSETS $ 6,069 $ 5,806 $ 4,129 $ 17,135 $ (18,595 ) $ 14,544 LIABILITIES AND SHAREHOLDERS’ EQUITY Unearned premium reserves $ — $ — $ — $ 5,143 $ (1,147 ) $ 3,996 Loss and LAE reserve — — — 1,537 (470 ) 1,067 Long-term debt — 842 445 13 — 1,300 Intercompany payable — 90 — 300 (390 ) — Credit derivative liabilities — — — 572 (126 ) 446 Deferred tax liabilities, net — — 91 — (91 ) — Financial guaranty variable interest entities’ liabilities, at fair value — — — 1,349 — 1,349 Other 6 82 15 622 (402 ) 323 TOTAL LIABILITIES 6 1,014 551 9,536 (2,626 ) 8,481 TOTAL SHAREHOLDERS’ EQUITY ATTRIBUTABLE TO ASSURED GUARANTY LTD. 6,063 4,792 3,578 7,222 (15,592 ) 6,063 Noncontrolling interest — — — 377 (377 ) — TOTAL SHAREHOLDERS’ EQUITY 6,063 4,792 3,578 7,599 (15,969 ) 6,063 TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY $ 6,069 $ 5,806 $ 4,129 $ 17,135 $ (18,595 ) $ 14,544
Condensed Consolidating Statement of Operations and Comprehensive Income	CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME FOR THE THREE MONTHS ENDED JUNE 30, 2016 (in millions) Assured Guaranty Ltd. (Parent) AGUS (Issuer) AGMH (Issuer) Other Entities Consolidating Adjustments Assured Guaranty Ltd. (Consolidated) REVENUES Net earned premiums $ — $ — $ — $ 222 $ (8 ) $ 214 Net investment income 0 0 0 98 0 98 Net realized investment gains (losses) 0 — 0 10 0 10 Net change in fair value of credit derivatives: Realized gains (losses) and other settlements — — — 24 0 24 Net unrealized gains (losses) — — — 39 — 39 Net change in fair value of credit derivatives — — — 63 0 63 Other 0 — — 11 0 11 TOTAL REVENUES 0 0 0 404 (8 ) 396 EXPENSES Loss and LAE — — — 104 (2 ) 102 Amortization of deferred acquisition costs — — — 7 (2 ) 5 Interest expense — 13 14 2 (4 ) 25 Other operating expenses 8 0 0 55 0 63 TOTAL EXPENSES 8 13 14 168 (8 ) 195 INCOME (LOSS) BEFORE INCOME TAXES AND EQUITY IN NET EARNINGS OF SUBSIDIARIES (8 ) (13 ) (14 ) 236 0 201 Total (provision) benefit for income taxes — 4 5 (65 ) 1 (55 ) Equity in net earnings of subsidiaries 154 140 113 14 (421 ) — NET INCOME (LOSS) $ 146 $ 131 $ 104 $ 185 $ (420 ) $ 146 Less: noncontrolling interest — — — 14 (14 ) — NET INCOME (LOSS) ATTRIBUTABLE TO ASSURED GUARANTY LTD. $ 146 $ 131 $ 104 $ 171 $ (406 ) $ 146 COMPREHENSIVE INCOME (LOSS) $ 210 $ 166 $ 125 $ 248 $ (539 ) $ 210 CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME FOR THE THREE MONTHS ENDED JUNE 30, 2015 (in millions) Assured Guaranty Ltd. (Parent) AGUS (Issuer) AGMH (Issuer) Other Entities Consolidating Adjustments Assured Guaranty Ltd. (Consolidated) REVENUES Net earned premiums $ — $ — $ — $ 226 $ (7 ) $ 219 Net investment income 0 0 0 101 (3 ) 98 Net realized investment gains (losses) 0 0 1 (10 ) 0 (9 ) Net change in fair value of credit derivatives: Realized gains (losses) and other settlements — — — 8 0 8 Net unrealized gains (losses) — — — 108 (26 ) 82 Net change in fair value of credit derivatives — — — 116 (26 ) 90 Bargain purchase gain and settlement of pre-existing relationships — — — 54 160 214 Other — — — 83 — 83 TOTAL REVENUES 0 0 1 570 124 695 EXPENSES Loss and LAE — — — 184 4 188 Amortization of deferred acquisition costs — — — 8 (2 ) 6 Interest expense — 13 14 3 (4 ) 26 Other operating expenses 9 1 0 57 (1 ) 66 TOTAL EXPENSES 9 14 14 252 (3 ) 286 INCOME (LOSS) BEFORE INCOME TAXES AND EQUITY IN NET EARNINGS OF SUBSIDIARIES (9 ) (14 ) (13 ) 318 127 409 Total (provision) benefit for income taxes — 4 4 (78 ) (42 ) (112 ) Equity in net earnings of subsidiaries 306 305 122 11 (744 ) — NET INCOME (LOSS) $ 297 $ 295 $ 113 $ 251 $ (659 ) $ 297 Less: noncontrolling interest — — — 11 (11 ) — NET INCOME (LOSS) ATTRIBUTABLE TO ASSURED GUARANTY LTD. $ 297 $ 295 $ 113 $ 240 $ (648 ) $ 297 COMPREHENSIVE INCOME (LOSS) $ 166 $ 210 $ 50 $ 122 $ (382 ) $ 166 CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME FOR THE SIX MONTHS ENDED JUNE 30, 2016 (in millions) Assured Guaranty Ltd. (Parent) AGUS (Issuer) AGMH (Issuer) Other Entities Consolidating Adjustments Assured Guaranty Ltd. (Consolidated) REVENUES Net earned premiums $ — $ — $ — $ 414 $ (17 ) $ 397 Net investment income 0 0 0 198 (1 ) 197 Net realized investment gains (losses) 0 — 0 (2 ) (1 ) (3 ) Net change in fair value of credit derivatives: Realized gains (losses) and other settlements — — — 32 0 32 Net unrealized gains (losses) — — — (29 ) — (29 ) Net change in fair value of credit derivatives — — — 3 0 3 Other 0 — — 47 0 47 TOTAL REVENUES 0 0 0 660 (19 ) 641 EXPENSES Loss and LAE — — — 197 (5 ) 192 Amortization of deferred acquisition costs — — — 14 (5 ) 9 Interest expense — 26 27 5 (7 ) 51 Other operating expenses 16 0 1 107 (1 ) 123 TOTAL EXPENSES 16 26 28 323 (18 ) 375 INCOME (LOSS) BEFORE INCOME TAXES AND EQUITY IN NET EARNINGS OF SUBSIDIARIES (16 ) (26 ) (28 ) 337 (1 ) 266 Total (provision) benefit for income taxes — 9 10 (81 ) 1 (61 ) Equity in net earnings of subsidiaries 221 190 190 23 (624 ) — NET INCOME (LOSS) $ 205 $ 173 $ 172 $ 279 $ (624 ) $ 205 Less: noncontrolling interest — — — 23 (23 ) — NET INCOME (LOSS) ATTRIBUTABLE TO ASSURED GUARANTY LTD. $ 205 $ 173 $ 172 $ 256 $ (601 ) $ 205 COMPREHENSIVE INCOME (LOSS) $ 351 $ 246 $ 217 $ 426 $ (889 ) $ 351 CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME FOR THE SIX MONTHS ENDED JUNE 30, 2015 (in millions) Assured Guaranty Ltd. (Parent) AGUS (Issuer) AGMH (Issuer) Other Entities Consolidating Adjustments Assured Guaranty Ltd. (Consolidated) REVENUES Net earned premiums $ — $ — $ — $ 366 $ (5 ) $ 361 Net investment income 0 0 0 205 (6 ) 199 Net realized investment gains (losses) 0 0 1 9 (3 ) 7 Net change in fair value of credit derivatives: Realized gains (losses) and other settlements — — — 29 0 29 Net unrealized gains (losses) — — — 211 (26 ) 185 Net change in fair value of credit derivatives — — — 240 (26 ) 214 Bargain purchase gain and settlement of pre-existing relationships — — — 54 160 214 Other — — — 69 — 69 TOTAL REVENUES 0 0 1 943 120 1,064 EXPENSES Loss and LAE — — — 202 4 206 Amortization of deferred acquisition costs — — — 14 (4 ) 10 Interest expense — 26 27 7 (9 ) 51 Other operating expenses 17 1 0 105 (1 ) 122 TOTAL EXPENSES 17 27 27 328 (10 ) 389 INCOME (LOSS) BEFORE INCOME TAXES AND EQUITY IN NET EARNINGS OF SUBSIDIARIES (17 ) (27 ) (26 ) 615 130 675 Total (provision) benefit for income taxes — 9 9 (150 ) (45 ) (177 ) Equity in net earnings of subsidiaries 515 468 214 20 (1,217 ) — NET INCOME (LOSS) $ 498 $ 450 $ 197 $ 485 $ (1,132 ) $ 498 Less: noncontrolling interest — — — 20 (20 ) — NET INCOME (LOSS) ATTRIBUTABLE TO ASSURED GUARANTY LTD. $ 498 $ 450 $ 197 $ 465 $ (1,112 ) $ 498 COMPREHENSIVE INCOME (LOSS) $ 367 $ 344 $ 130 $ 355 $ (829 ) $ 367
Condensed Consolidating Statement of Cash Flows	CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS FOR THE SIX MONTHS ENDED JUNE 30, 2016 (in millions) Assured Guaranty Ltd. (Parent) AGUS (Issuer) AGMH (Issuer) Other Entities Consolidating Adjustments Assured Guaranty Ltd. (Consolidated) Net cash flows provided by (used in) operating activities $ 202 $ 31 $ 101 $ 139 $ (520 ) $ (47 ) Cash flows from investing activities Fixed-maturity securities: Purchases (4 ) (32 ) — (474 ) — (510 ) Sales 4 — 10 725 — 739 Maturities — 21 — 624 — 645 Sales (purchases) of short-term investments, net (31 ) (12 ) (11 ) (136 ) — (190 ) Net proceeds from financial guaranty variable entities’ assets — — — 556 — 556 Investment in subsidiary — — — 4 (4 ) — Cash restricted for CIFG acquisition — — — (451 ) — (451 ) Other — — — (12 ) — (12 ) Net cash flows provided by (used in) investing activities (31 ) (23 ) (1 ) 836 (4 ) 777 Cash flows from financing activities Return of capital — — — (4 ) 4 — Dividends paid (35 ) (103 ) (103 ) (314 ) 520 (35 ) Repurchases of common stock (135 ) — — — — (135 ) Share activity under option and incentive plans 0 — — (1 ) — (1 ) Net paydowns of financial guaranty variable entities’ liabilities — — — (531 ) — (531 ) Payment of long-term debt — — — (1 ) — (1 ) Net cash flows provided by (used in) financing activities (170 ) (103 ) (103 ) (851 ) 524 (703 ) Effect of exchange rate changes — — — (3 ) — (3 ) Increase (decrease) in cash 1 (95 ) (3 ) 121 — 24 Cash at beginning of period 0 95 8 63 — 166 Cash at end of period $ 1 $ 0 $ 5 $ 184 $ — $ 190 CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS FOR THE SIX MONTHS ENDED JUNE 30, 2015 (in millions) Assured Guaranty Ltd. (Parent) AGUS (Issuer) AGMH (Issuer) Other Entities Consolidating Adjustments Assured Guaranty Ltd. (Consolidated) Net cash flows provided by (used in) operating activities $ 343 $ 138 $ 83 $ 170 $ (629 ) $ 105 Cash flows from investing activities Fixed-maturity securities: Purchases — (67 ) (6 ) (1,099 ) — (1,172 ) Sales — 159 27 1,195 — 1,381 Maturities — 6 — 405 — 411 Sales (purchases) of short-term investments, net (19 ) 39 (1 ) 363 — 382 Net proceeds from financial guaranty variable entities’ assets — — — 70 — 70 Investment in subsidiary — — 25 — (25 ) — Acquisition of Radian Asset, net of cash acquired — — — (800 ) — (800 ) Other — — — 27 — 27 Net cash flows provided by (used in) investing activities (19 ) 137 45 161 (25 ) 299 Cash flows from financing activities Return of capital — — — (25 ) 25 — Dividends paid (37 ) (275 ) (128 ) (226 ) 629 (37 ) Repurchases of common stock (285 ) — — — — (285 ) Share activity under option and incentive plans (2 ) — — — — (2 ) Net paydowns of financial guaranty variable entities’ liabilities — — — (78 ) — (78 ) Payment of long-term debt — — — (2 ) — (2 ) Net cash flows provided by (used in) financing activities (324 ) (275 ) (128 ) (331 ) 654 (404 ) Effect of exchange rate changes — — — 0 — 0 Increase (decrease) in cash — — — — — 0 Cash at beginning of period 0 0 4 71 — 75 Cash at end of period $ 0 $ 0 $ 4 $ 71 $ — $ 75

Business and Basis of Present43

Business and Basis of Presentation Business and Basis of Presentation (Details)	Jun. 30, 2016Company
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of holding companies having outstanding public debt	2

Acquisitions - Narrative (Detai

Acquisitions - Narrative (Details) $ in Millions	Jul. 01, 2016USD ($)	Apr. 01, 2015USD ($)	Jun. 30, 2016Company
Business Acquisition [Line Items]
Financial guaranty companies acquired | Company			2
Radian [Member]
Business Acquisition [Line Items]
Net par amount outstanding assumed in business acquisition		$ 13,600
Subsidiaries [Member] | Radian [Member]
Business Acquisition [Line Items]
Cash purchase price		$ 804.5
Subsequent Event [Member] | Subsidiaries [Member] | CIFG Holding Inc. [Member]
Business Acquisition [Line Items]
Cash purchase price	$ 450.6
Subsequent Event [Member] | CIFG Holding Inc. [Member]
Business Acquisition [Line Items]
Net par amount outstanding assumed in business acquisition	$ 4,400

Outstanding Exposure - Debt Ser

Outstanding Exposure - Debt Service Outstanding (Details) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Schedule of Insured Financial Obligations [Line Items]
Gross Debt Service Outstanding	$ 508,805	$ 559,470
Net Debt Service Outstanding	488,362	536,341
Public Finance [Member]
Schedule of Insured Financial Obligations [Line Items]
Gross Debt Service Outstanding	473,991	515,494
Net Debt Service Outstanding	455,056	494,426
Structured Finance [Member]
Schedule of Insured Financial Obligations [Line Items]
Gross Debt Service Outstanding	34,814	43,976
Net Debt Service Outstanding	$ 33,306	$ 41,915

Outstanding Exposure - Financia

Outstanding Exposure - Financial Guaranty Portfolio by Internal Rating (Details) - USD ($) $ in Millions	Jun. 30, 2016		Dec. 31, 2015
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	$ 329,864	[1]	$ 358,571	[2]
% of total net par outstanding	100.00%	[1]	100.00%	[2]
Loss mitigation bonds	$ 1,400		$ 1,500
AAA [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	$ 16,061		$ 20,837
% of total net par outstanding	4.90%		5.80%
AA [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	$ 67,953		$ 79,402
% of total net par outstanding	20.60%		22.10%
A [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	$ 150,933		$ 167,246
% of total net par outstanding	45.70%		46.70%
BBB [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	$ 80,127		$ 75,903
% of total net par outstanding	24.30%		21.20%
BIG [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	$ 14,790		$ 15,183
% of total net par outstanding	4.50%		4.20%
Public Finance [Member] | United States [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	$ 272,114	[1],[3]	$ 291,866	[2]
% of total net par outstanding	100.00%	[1]	100.00%	[2]
Public Finance [Member] | Non United States [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	$ 28,128	[1]	$ 29,577	[2]
% of total net par outstanding	100.00%	[1]	100.00%	[2]
Public Finance [Member] | AAA [Member] | United States [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	$ 2,376		$ 3,053
% of total net par outstanding	0.90%		1.10%
Public Finance [Member] | AAA [Member] | Non United States [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	$ 695		$ 709
% of total net par outstanding	2.50%		2.40%
Public Finance [Member] | AA [Member] | United States [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	$ 59,310		$ 69,274
% of total net par outstanding	21.80%		23.70%
Public Finance [Member] | AA [Member] | Non United States [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	$ 1,775		$ 2,017
% of total net par outstanding	6.30%		6.80%
Public Finance [Member] | A [Member] | United States [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	$ 142,028		$ 157,440
% of total net par outstanding	52.20%		53.90%
Public Finance [Member] | A [Member] | Non United States [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	$ 6,440		$ 6,765
% of total net par outstanding	22.90%		22.90%
Public Finance [Member] | BBB [Member] | United States [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	$ 60,132		$ 54,315
% of total net par outstanding	22.10%		18.60%
Public Finance [Member] | BBB [Member] | Non United States [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	$ 17,840		$ 18,708
% of total net par outstanding	63.40%		63.20%
Public Finance [Member] | BIG [Member] | United States [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	$ 8,268	[3]	$ 7,784
% of total net par outstanding	3.00%		2.70%
Public Finance [Member] | BIG [Member] | Non United States [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	$ 1,378		$ 1,378
% of total net par outstanding	4.90%		4.70%
Structured Finance [Member] | United States [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	$ 25,562	[1]	$ 31,770	[2]
% of total net par outstanding	100.00%	[1]	100.00%	[2]
Structured Finance [Member] | Non United States [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	$ 4,060	[1]	$ 5,358	[2]
% of total net par outstanding	100.00%	[1]	100.00%	[2]
Structured Finance [Member] | AAA [Member] | United States [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	$ 11,362		$ 14,366
% of total net par outstanding	44.40%		45.20%
Structured Finance [Member] | AAA [Member] | Non United States [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	$ 1,628		$ 2,709
% of total net par outstanding	40.10%		50.60%
Structured Finance [Member] | AA [Member] | United States [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	$ 6,719		$ 7,934
% of total net par outstanding	26.30%		25.00%
Structured Finance [Member] | AA [Member] | Non United States [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	$ 149		$ 177
% of total net par outstanding	3.70%		3.30%
Structured Finance [Member] | A [Member] | United States [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	$ 2,008		$ 2,486
% of total net par outstanding	7.90%		7.80%
Structured Finance [Member] | A [Member] | Non United States [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	$ 457		$ 555
% of total net par outstanding	11.20%		10.30%
Structured Finance [Member] | BBB [Member] | United States [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	$ 920		$ 1,515
% of total net par outstanding	3.60%		4.80%
Structured Finance [Member] | BBB [Member] | Non United States [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	$ 1,235		$ 1,365
% of total net par outstanding	30.40%		25.50%
Structured Finance [Member] | BIG [Member] | United States [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	$ 4,553		$ 5,469
% of total net par outstanding	17.80%		17.20%
Structured Finance [Member] | BIG [Member] | Non United States [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	$ 591		$ 552
% of total net par outstanding	14.60%		10.30%
[1]	Excludes $1.4 billion of loss mitigation securities insured and held by the Company as of June 30, 2016, which are primarily BIG.
[2]	Excludes $1.5 billion of loss mitigation securities insured and held by the Company as of December 31, 2015, which are primarily BIG.
[3]	Subsequent to June 30, 2016, and as a result of its July 1, 2016 Puerto Rico claim payments, the Company downgraded from BIG 1 to BIG 3 $1,803 million net par outstanding of financial guaranty insurance across two risks..

Outstanding Exposure - Componen

Outstanding Exposure - Components of BIG Net Par Outstanding (Details) - USD ($) $ in Millions	Jun. 30, 2016		Dec. 31, 2015
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	$ 329,864	[1]	$ 358,571	[2]
Triple-X Life Insurance Transaction [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	2,189		2,750
Trust Preferred Securities (TruPS) [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	3,255		4,379
Student Loan [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	1,645		1,818
Other structured finance [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	16,451		21,114
BIG [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	14,790		15,183
BIG [Member] | Triple-X Life Insurance Transaction [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	216		216
BIG [Member] | Trust Preferred Securities (TruPS) [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	563		806
BIG [Member] | Student Loan [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	110		163
BIG [Member] | Other structured finance [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	828		863
BIG [Member] | BIG 1 [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	7,056	[3]	8,023
BIG [Member] | BIG 1 [Member] | Triple-X Life Insurance Transaction [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	0		0
BIG [Member] | BIG 1 [Member] | Trust Preferred Securities (TruPS) [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	436		679
BIG [Member] | BIG 1 [Member] | Student Loan [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	0		12
BIG [Member] | BIG 1 [Member] | Other structured finance [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	537		672
BIG [Member] | BIG 2 [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	4,569		4,129
BIG [Member] | BIG 2 [Member] | Triple-X Life Insurance Transaction [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	0		0
BIG [Member] | BIG 2 [Member] | Trust Preferred Securities (TruPS) [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	127		127
BIG [Member] | BIG 2 [Member] | Student Loan [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	68		68
BIG [Member] | BIG 2 [Member] | Other structured finance [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	254		151
BIG [Member] | BIG 3 [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	3,165	[3]	3,031
BIG [Member] | BIG 3 [Member] | Triple-X Life Insurance Transaction [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	216		216
BIG [Member] | BIG 3 [Member] | Trust Preferred Securities (TruPS) [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	0		0
BIG [Member] | BIG 3 [Member] | Student Loan [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	42		83
BIG [Member] | BIG 3 [Member] | Other structured finance [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	37		40
United States [Member] | Public Finance [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	272,114	[1],[4]	291,866	[2]
United States [Member] | RMBS [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	6,082		7,067
United States [Member] | BIG [Member] | Public Finance [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	8,268	[4]	7,784
United States [Member] | BIG [Member] | RMBS [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	3,427		3,973
United States [Member] | BIG [Member] | BIG 1 [Member] | Public Finance [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	4,902	[4]	4,765
United States [Member] | BIG [Member] | BIG 1 [Member] | RMBS [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	318		1,020
United States [Member] | BIG [Member] | BIG 2 [Member] | Public Finance [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	3,191	[4]	2,883
United States [Member] | BIG [Member] | BIG 2 [Member] | RMBS [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	414		397
United States [Member] | BIG [Member] | BIG 3 [Member] | Public Finance [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	175	[4]	136
United States [Member] | BIG [Member] | BIG 3 [Member] | RMBS [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	2,695		2,556
Non United States [Member] | Public Finance [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	28,128	[1]	29,577	[2]
Non United States [Member] | BIG [Member] | Public Finance [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	1,378		1,378
Non United States [Member] | BIG [Member] | BIG 1 [Member] | Public Finance [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	863		875
Non United States [Member] | BIG [Member] | BIG 2 [Member] | Public Finance [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	515		503
Non United States [Member] | BIG [Member] | BIG 3 [Member] | Public Finance [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	0		0
First Lien [Member] | United States [Member] | Prime [Member] | RMBS [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	237		445
First Lien [Member] | United States [Member] | Alt-A [Member] | RMBS [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	1,090		1,353
First Lien [Member] | United States [Member] | Option ARM [Member] | RMBS [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	186		252
First Lien [Member] | United States [Member] | Subprime [Member] | RMBS [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	3,193		3,457
First Lien [Member] | United States [Member] | BIG [Member] | Prime [Member] | RMBS [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	124		284
First Lien [Member] | United States [Member] | BIG [Member] | Alt-A [Member] | RMBS [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	621		793
First Lien [Member] | United States [Member] | BIG [Member] | Option ARM [Member] | RMBS [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	96		141
First Lien [Member] | United States [Member] | BIG [Member] | Subprime [Member] | RMBS [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	1,220		1,304
First Lien [Member] | United States [Member] | BIG [Member] | BIG 1 [Member] | Prime [Member] | RMBS [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	21		225
First Lien [Member] | United States [Member] | BIG [Member] | BIG 1 [Member] | Alt-A [Member] | RMBS [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	120		119
First Lien [Member] | United States [Member] | BIG [Member] | BIG 1 [Member] | Option ARM [Member] | RMBS [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	27		39
First Lien [Member] | United States [Member] | BIG [Member] | BIG 1 [Member] | Subprime [Member] | RMBS [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	128		146
First Lien [Member] | United States [Member] | BIG [Member] | BIG 2 [Member] | Prime [Member] | RMBS [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	83		34
First Lien [Member] | United States [Member] | BIG [Member] | BIG 2 [Member] | Alt-A [Member] | RMBS [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	42		73
First Lien [Member] | United States [Member] | BIG [Member] | BIG 2 [Member] | Option ARM [Member] | RMBS [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	6		12
First Lien [Member] | United States [Member] | BIG [Member] | BIG 2 [Member] | Subprime [Member] | RMBS [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	210		228
First Lien [Member] | United States [Member] | BIG [Member] | BIG 3 [Member] | Prime [Member] | RMBS [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	20		25
First Lien [Member] | United States [Member] | BIG [Member] | BIG 3 [Member] | Alt-A [Member] | RMBS [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	459		601
First Lien [Member] | United States [Member] | BIG [Member] | BIG 3 [Member] | Option ARM [Member] | RMBS [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	63		90
First Lien [Member] | United States [Member] | BIG [Member] | BIG 3 [Member] | Subprime [Member] | RMBS [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	882		930
Second Lien [Member] | United States [Member] | RMBS [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	1,376		1,560
Second Lien [Member] | United States [Member] | BIG [Member] | RMBS [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	1,366		1,451
Second Lien [Member] | United States [Member] | BIG [Member] | BIG 1 [Member] | RMBS [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	22		491
Second Lien [Member] | United States [Member] | BIG [Member] | BIG 2 [Member] | RMBS [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	73		50
Second Lien [Member] | United States [Member] | BIG [Member] | BIG 3 [Member] | RMBS [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	$ 1,271		$ 910
[1]	Excludes $1.4 billion of loss mitigation securities insured and held by the Company as of June 30, 2016, which are primarily BIG.
[2]	Excludes $1.5 billion of loss mitigation securities insured and held by the Company as of December 31, 2015, which are primarily BIG.
[3]	Subsequent to June 30, 2016, and as a result of its July 1, 2016 Puerto Rico claim payments, the Company downgraded from BIG 1 to BIG 3 $1,803 million net par outstanding of financial guaranty insurance across two risks.
[4]	Subsequent to June 30, 2016, and as a result of its July 1, 2016 Puerto Rico claim payments, the Company downgraded from BIG 1 to BIG 3 $1,803 million net par outstanding of financial guaranty insurance across two risks..

Outstanding Exposure - BIG Net

Outstanding Exposure - BIG Net Par Outstanding (Details) $ in Millions		1 Months Ended
		Aug. 03, 2016USD ($)	Jul. 01, 2016risk	Jun. 30, 2016USD ($)risk		Dec. 31, 2015USD ($)risk
Schedule of Insured Financial Obligations [Line Items]
Net Par Outstanding, Credit Derivative				$ 20,014		$ 25,594
Net par amount outstanding				329,864	[1]	358,571	[2]
BIG [Member]
Schedule of Insured Financial Obligations [Line Items]
Net Par Outstanding, Financial Guaranty Insurance	[3]			13,704		13,574
Net Par Outstanding, Credit Derivative				1,086		1,609
Net par amount outstanding				$ 14,790		$ 15,183
Number of Risks, Financial Guaranty Insurance | risk	[3],[4],[5]			405		419
Number of Risks, Credit Derivative | risk	[4]			27		32
Number of Risks | risk	[4]			432		451
BIG [Member] | BIG 1 [Member]
Schedule of Insured Financial Obligations [Line Items]
Net Par Outstanding, Financial Guaranty Insurance	[3]			$ 6,546	[6]	$ 7,019
Net Par Outstanding, Credit Derivative				510	[6]	1,004
Net par amount outstanding				$ 7,056	[6]	$ 8,023
Number of Risks, Financial Guaranty Insurance | risk	[3],[4]			198	[6]	202
Number of Risks, Credit Derivative | risk	[4]			10	[6]	12
Number of Risks | risk	[4]			208	[6]	214
BIG [Member] | BIG 2 [Member]
Schedule of Insured Financial Obligations [Line Items]
Net Par Outstanding, Financial Guaranty Insurance	[3]			$ 4,119		$ 3,655
Net Par Outstanding, Credit Derivative				450		474
Net par amount outstanding				$ 4,569		$ 4,129
Number of Risks, Financial Guaranty Insurance | risk	[3],[4]			76		85
Number of Risks, Credit Derivative | risk	[4]			5		8
Number of Risks | risk	[4]			81		93
BIG [Member] | BIG 3 [Member]
Schedule of Insured Financial Obligations [Line Items]
Net Par Outstanding, Financial Guaranty Insurance	[3]			$ 3,039	[6]	$ 2,900
Net Par Outstanding, Credit Derivative				126	[6]	131
Net par amount outstanding				$ 3,165	[6]	$ 3,031
Number of Risks, Financial Guaranty Insurance | risk	[3],[4]			131	[6]	132
Number of Risks, Credit Derivative | risk	[4]			12	[6]	12
Number of Risks | risk	[4]			143	[6]	144
Subsequent Event [Member] | BIG [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding downgraded		$ 1,803
Number of risks downgraded | risk			2
[1]	Excludes $1.4 billion of loss mitigation securities insured and held by the Company as of June 30, 2016, which are primarily BIG.
[2]	Excludes $1.5 billion of loss mitigation securities insured and held by the Company as of December 31, 2015, which are primarily BIG.
[3]	Includes net par outstanding for VIEs.
[4]	A risk represents the aggregate of the financial guaranty policies that share the same revenue source for purposes of making debt service payments.
[5]	A risk represents the aggregate of the financial guaranty policies that share the same revenue source for purposes of making debt service payments. The ceded number of risks represents the number of risks for which the Company ceded a portion of its exposure
[6]	Subsequent to June 30, 2016, and as a result of its July 1, 2016 Puerto Rico claim payments, the Company downgraded from BIG 1 to BIG 3 $1,803 million net par outstanding of financial guaranty insurance across two risks.

Outstanding Exposure - Puerto R

Outstanding Exposure - Puerto Rico Gross Par and Gross Debt Service Outstanding (Details) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Schedule of Insured Financial Obligations [Line Items]
Gross Debt Service Outstanding	$ 508,805	$ 559,470
Puerto Rico [Member]
Schedule of Insured Financial Obligations [Line Items]
Gross par outstanding	5,756	5,755
Gross Debt Service Outstanding	$ 9,483	$ 9,632

Outstanding Exposure - Puerto50

Outstanding Exposure - Puerto Rico Net Par Outstanding (Details) - USD ($) $ in Millions		Jun. 30, 2016		Dec. 31, 2015
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding		$ 329,864	[1]	$ 358,571	[2]
Puerto Rico [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding		5,054		5,053
Constitutionally Guaranteed [Member] | Puerto Rico [Member] | Commonwealth of Puerto Rico - General Obligation Bonds [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	[3]	1,615		1,615
Constitutionally Guaranteed [Member] | Puerto Rico [Member] | Puerto Rico Public Buildings Authority [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	[3]	188		188
Public Corporations, Subject To Clawback [Member] | Puerto Rico [Member] | PRHTA (Transportation revenue) [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding		910		909
Public Corporations, Subject To Clawback [Member] | Puerto Rico [Member] | PRHTA (Highway revenue) [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding		369		370
Public Corporations, Subject To Clawback [Member] | Puerto Rico [Member] | Puerto Rico Convention Center District Authority [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding		164		164
Public Corporations, Subject To Clawback [Member] | Puerto Rico [Member] | PRIFA [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding	[3]	18		18
Public Corporations [Member] | Puerto Rico [Member] | PREPA [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding		744		744
Public Corporations [Member] | Puerto Rico [Member] | Puerto Rico Aqueduct and Sewer Authority [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding		388		388
Public Corporations [Member] | Puerto Rico [Member] | MFA [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding		387		387
Public Corporations [Member] | Puerto Rico [Member] | Puerto Rico Sales Tax Financing Corporation [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding		270		269
Public Corporations [Member] | Puerto Rico [Member] | University of Puerto Rico [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding		$ 1		$ 1
[1]	Excludes $1.4 billion of loss mitigation securities insured and held by the Company as of June 30, 2016, which are primarily BIG.
[2]	Excludes $1.5 billion of loss mitigation securities insured and held by the Company as of December 31, 2015, which are primarily BIG.
[3]	As of the date of this filing, the Company has paid claims on these credits.

Outstanding Exposure - Amortiza

Outstanding Exposure - Amortization Schedule of Puerto Rico Net Par Outstanding and Net Debt Service Outstanding (Details) - USD ($) $ in Millions	Jun. 30, 2016		Dec. 31, 2015
Estimated Net Par Amortization [Abstract]
Net par amount outstanding	$ 329,864	[1]	$ 358,571	[2]
Estimated Net Debt Service Amortization [Abstract]
Total	488,362		536,341
Puerto Rico [Member]
Estimated Net Par Amortization [Abstract]
2016 (July 1 – September 30)	302
2016 (October 1 – December 31)	0
2,017	222
2,018	179
2,019	204
2,020	270
2,021	125
2,022	115
2,023	150
2,024	174
2,025	196
2026-2030	943
2031-2035	1,131
2036-2040	579
2041-2045	296
2046-2047	168
Net par amount outstanding	5,054		5,053
Estimated Net Debt Service Amortization [Abstract]
2016 (July 1 – September 30)	428
2016 (October 1 – December 31)	2
2,017	463
2,018	410
2,019	424
2,020	482
2,021	323
2,022	305
2,023	338
2,024	352
2,025	366
2026-2030	1,633
2031-2035	1,599
2036-2040	780
2041-2045	380
2046-2047	181
Total	8,466
BIG [Member]
Estimated Net Par Amortization [Abstract]
Net par amount outstanding	14,790		$ 15,183
BIG [Member] | Puerto Rico [Member]
Estimated Net Par Amortization [Abstract]
Net par amount outstanding	$ 5,100
[1]	Excludes $1.4 billion of loss mitigation securities insured and held by the Company as of June 30, 2016, which are primarily BIG.
[2]	Excludes $1.5 billion of loss mitigation securities insured and held by the Company as of December 31, 2015, which are primarily BIG.

Outstanding Exposure - Net Dire

Outstanding Exposure - Net Direct Economic Exposure to Selected European Countries (Details) $ in Millions	Jun. 30, 2016USD ($)	[1]
Schedule of Insured Financial Obligations [Line Items]
Net Par Outstanding, European Exposure	$ 2,314
BIG [Member]
Schedule of Insured Financial Obligations [Line Items]
Net Par Outstanding, European Exposure	815
Hungary [Member]
Schedule of Insured Financial Obligations [Line Items]
Net Par Outstanding, European Exposure	439
Hungary [Member] | BIG [Member]
Schedule of Insured Financial Obligations [Line Items]
Net Par Outstanding, European Exposure	369
Italy [Member]
Schedule of Insured Financial Obligations [Line Items]
Net Par Outstanding, European Exposure	1,225
Italy [Member] | BIG [Member]
Schedule of Insured Financial Obligations [Line Items]
Net Par Outstanding, European Exposure	0
Portugal [Member]
Schedule of Insured Financial Obligations [Line Items]
Net Par Outstanding, European Exposure	80
Portugal [Member] | BIG [Member]
Schedule of Insured Financial Obligations [Line Items]
Net Par Outstanding, European Exposure	80
Spain [Member]
Schedule of Insured Financial Obligations [Line Items]
Net Par Outstanding, European Exposure	366
Spain [Member] | BIG [Member]
Schedule of Insured Financial Obligations [Line Items]
Net Par Outstanding, European Exposure	366
Turkey [Member]
Schedule of Insured Financial Obligations [Line Items]
Net Par Outstanding, European Exposure	204
Turkey [Member] | BIG [Member]
Schedule of Insured Financial Obligations [Line Items]
Net Par Outstanding, European Exposure	0
Total Sovereign Exposure [Member]
Schedule of Insured Financial Obligations [Line Items]
Net Par Outstanding, European Exposure	1,504	[2]
Total Sovereign Exposure [Member] | Hungary [Member]
Schedule of Insured Financial Obligations [Line Items]
Net Par Outstanding, European Exposure	265	[2]
Total Sovereign Exposure [Member] | Italy [Member]
Schedule of Insured Financial Obligations [Line Items]
Net Par Outstanding, European Exposure	793	[2]
Total Sovereign Exposure [Member] | Portugal [Member]
Schedule of Insured Financial Obligations [Line Items]
Net Par Outstanding, European Exposure	80	[2]
Total Sovereign Exposure [Member] | Spain [Member]
Schedule of Insured Financial Obligations [Line Items]
Net Par Outstanding, European Exposure	366	[2]
Total Sovereign Exposure [Member] | Turkey [Member]
Schedule of Insured Financial Obligations [Line Items]
Net Par Outstanding, European Exposure	0	[2]
Total Non-sovereign Exposure [Member]
Schedule of Insured Financial Obligations [Line Items]
Net Par Outstanding, European Exposure	810	[3]
Total Non-sovereign Exposure [Member] | Hungary [Member]
Schedule of Insured Financial Obligations [Line Items]
Net Par Outstanding, European Exposure	174	[3]
Total Non-sovereign Exposure [Member] | Italy [Member]
Schedule of Insured Financial Obligations [Line Items]
Net Par Outstanding, European Exposure	432	[3]
Total Non-sovereign Exposure [Member] | Portugal [Member]
Schedule of Insured Financial Obligations [Line Items]
Net Par Outstanding, European Exposure	0	[3]
Total Non-sovereign Exposure [Member] | Spain [Member]
Schedule of Insured Financial Obligations [Line Items]
Net Par Outstanding, European Exposure	0	[3]
Total Non-sovereign Exposure [Member] | Turkey [Member]
Schedule of Insured Financial Obligations [Line Items]
Net Par Outstanding, European Exposure	$ 204	[3]
[1]	While the Company’s exposures are shown in U.S. dollars, the obligations the Company insures are in various currencies, primarily Euros.
[2]	Sub-sovereign exposure in Selected European Countries includes transactions backed by receivables from or supported by sub-sovereigns, which are governmental or government-backed entities other than the ultimate governing body of the country.
[3]	Non-sovereign exposure in Selected European Countries includes debt of regulated utilities, RMBS and diversified payment rights ("DPR") securitizations.

Outstanding Exposure - Narrativ

Outstanding Exposure - Narrative (Details) - USD ($)		Jul. 01, 2016	Jun. 30, 2016		Mar. 04, 2016	Dec. 31, 2015		Dec. 24, 2015	Sep. 15, 2015
Schedule of Insured Financial Obligations [Line Items]
Net Debt Service Outstanding			$ 488,362,000,000			$ 536,341,000,000
Indirect European exposure			3,500,000,000
Net par amount outstanding			329,864,000,000	[1]		358,571,000,000	[2]
Net Par Outstanding, European Exposure	[3]		2,314,000,000
Pooled corporate obligations [Member]
Schedule of Insured Financial Obligations [Line Items]
Indirect European exposure			192,000,000
Structured Finance [Member]
Schedule of Insured Financial Obligations [Line Items]
Net Debt Service Outstanding			33,306,000,000			41,915,000,000
Public Finance [Member]
Schedule of Insured Financial Obligations [Line Items]
Net Debt Service Outstanding			455,056,000,000			494,426,000,000
Diversified Payment Rights [Member]
Schedule of Insured Financial Obligations [Line Items]
Net Par Outstanding, European Exposure			$ 204,000,000
BIG [Member]
Schedule of Insured Financial Obligations [Line Items]
Maximum period of liquidity claims (in years)			1 year
Net par amount outstanding			$ 14,790,000,000			15,183,000,000
Net Par Outstanding, European Exposure	[3]		815,000,000
AAA [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding			16,061,000,000			20,837,000,000
Ireland [Member] | Mortgage Loans on Real Estate [Member]
Schedule of Insured Financial Obligations [Line Items]
Net Debt Service Outstanding			104,000,000			102,000,000
United States [Member] | RMBS [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding			6,082,000,000			7,067,000,000
United States [Member] | Structured Finance [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding			25,562,000,000	[1]		31,770,000,000	[2]
United States [Member] | Public Finance [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding			272,114,000,000	[1],[4]		291,866,000,000	[2]
United States [Member] | BIG [Member] | RMBS [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding			3,427,000,000			3,973,000,000
United States [Member] | BIG [Member] | Structured Finance [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding			4,553,000,000			5,469,000,000
United States [Member] | BIG [Member] | Public Finance [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding			8,268,000,000	[4]		7,784,000,000
United States [Member] | AAA [Member] | Structured Finance [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding			11,362,000,000			14,366,000,000
United States [Member] | AAA [Member] | Public Finance [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding			2,376,000,000			3,053,000,000
Select European Countries [Member]
Schedule of Insured Financial Obligations [Line Items]
Indirect European exposure			203,000,000
Greece [Member] | Pooled corporate obligations [Member]
Schedule of Insured Financial Obligations [Line Items]
Indirect European exposure			4,000,000
Puerto Rico [Member]
Schedule of Insured Financial Obligations [Line Items]
Net Debt Service Outstanding			8,466,000,000
Net par amount outstanding			5,054,000,000			$ 5,053,000,000
Puerto Rico [Member] | BIG [Member]
Schedule of Insured Financial Obligations [Line Items]
Net par amount outstanding			5,100,000,000
Commitment to Provide Guarantees [Member] | Public Finance [Member]
Schedule of Insured Financial Obligations [Line Items]
Outstanding commitments to provide guaranties			117,000,000
Commitments due before expiration date			$ 53,000,000
Minimum [Member]
Schedule of Insured Financial Obligations [Line Items]
Probability of paying more claims than being reimbursed (as a percent)			50.00%
Minimum [Member] | Public Finance [Member]
Schedule of Insured Financial Obligations [Line Items]
Expiration date for insured financial obligation commitments			Jul. 1, 2016
Minimum [Member] | BIG [Member]
Schedule of Insured Financial Obligations [Line Items]
Constant discount rate (as a percent)			4.00%
Maximum [Member] | Public Finance [Member]
Schedule of Insured Financial Obligations [Line Items]
Expiration date for insured financial obligation commitments			Feb. 25, 2017
Maximum [Member] | BIG [Member]
Schedule of Insured Financial Obligations [Line Items]
Constant discount rate (as a percent)			5.00%
PRHTA (Highway revenue) [Member] | Puerto Rico [Member]
Schedule of Insured Financial Obligations [Line Items]
Obligations secured by taxes on crude oil, unfinished oil and derivative products			$ 120,000,000
PREPA [Member] | AGM and AGC [Member] | Puerto Rico [Member]
Schedule of Insured Financial Obligations [Line Items]
Payment On Outstanding Principal Amount			$ 74,000,000
Puerto Rico Aqueduct and Sewer Authority [Member] | U.S. Justice Department and U.S. Environmental Protection Agency [Member]
Schedule of Insured Financial Obligations [Line Items]
Settlement agreement, required spending threshold									$ 1,600,000,000
Settlement agreement, required spending, payable to contractor					$ 140,000,000
Surety Bond [Member] | Restructuring Support Agreement [Member] | PREPA [Member] | Puerto Rico [Member]
Schedule of Insured Financial Obligations [Line Items]
Possible liquidity claims, gross exposure								$ 113,000,000
Surety Bond [Member] | AGC [Member] | Restructuring Support Agreement [Member] | PREPA [Member] | Puerto Rico [Member]
Schedule of Insured Financial Obligations [Line Items]
Possible liquidity claims, gross exposure								14,000,000
Surety Bond [Member] | AGM [Member] | Restructuring Support Agreement [Member] | PREPA [Member] | Puerto Rico [Member]
Schedule of Insured Financial Obligations [Line Items]
Possible liquidity claims, gross exposure								99,000,000
Bridge Loan [Member] | Restructuring Support Agreement [Member] | PREPA [Member] | Puerto Rico [Member]
Schedule of Insured Financial Obligations [Line Items]
Guarantor obligations, debt financing amount								15,000,000
Bridge Loan [Member] | AGC [Member] | Restructuring Support Agreement [Member] | PREPA [Member] | Puerto Rico [Member]
Schedule of Insured Financial Obligations [Line Items]
Guarantor obligations, debt financing amount								2,000,000
Bridge Loan [Member] | AGM [Member] | Restructuring Support Agreement [Member] | PREPA [Member] | Puerto Rico [Member]
Schedule of Insured Financial Obligations [Line Items]
Guarantor obligations, debt financing amount								$ 13,000,000
Subsequent Event [Member] | Puerto Rico [Member]
Schedule of Insured Financial Obligations [Line Items]
Payments Made To Public On Outstanding Principal Amounts		$ 41,000,000
Subsequent Event [Member] | AGM [Member] | PREPA [Member] | Puerto Rico [Member]
Schedule of Insured Financial Obligations [Line Items]
Bonds issued in settlement		$ 26,000,000
[1]	Excludes $1.4 billion of loss mitigation securities insured and held by the Company as of June 30, 2016, which are primarily BIG.
[2]	Excludes $1.5 billion of loss mitigation securities insured and held by the Company as of December 31, 2015, which are primarily BIG.
[3]	While the Company’s exposures are shown in U.S. dollars, the obligations the Company insures are in various currencies, primarily Euros.
[4]	Subsequent to June 30, 2016, and as a result of its July 1, 2016 Puerto Rico claim payments, the Company downgraded from BIG 1 to BIG 3 $1,803 million net par outstanding of financial guaranty insurance across two risks..

Expected Loss to be Paid - Net

Expected Loss to be Paid - Net Expected Loss to be Paid After Net Expected Recoveries for Breaches of R&W Rollforward (Details) - USD ($) $ in Millions		3 Months Ended			6 Months Ended
		Jun. 30, 2016		Jun. 30, 2015	Jun. 30, 2016		Jun. 30, 2015	Dec. 31, 2015
Present Value of Net Expected Loss and Loss Adjustment Expenses to be Paid [Roll Forward]
Beginning of Period, Net Expected Loss to be Paid After Recoveries for R&W		$ 1,337		$ 1,154	$ 1,391	[1]	$ 1,169
Net expected loss to be paid on Radian Asset portfolio as of April 1, 2015				190			190
Economic loss development after recoveries for R&W		22		192	81		189
Accretion of discount		6		7	15		14
Changes in discount rates		45		(47)	108		(40)
Changes in timing and assumptions		(29)		232	(42)		215
(Paid) Recovered Losses After Recoveries for R&W	[2]	(33)		(26)	(146)		(38)
End of Period, Net Expected Loss to be Paid After Recoveries for R&W		1,326	[1]	1,510	$ 1,326	[1]	1,510
Period after the end of the reporting period within which the ceded paid losses are typically settled (in days)					45 days
Loss and LAE Reserve paid		7		5	$ 9		9
Expected LAE to be paid		8			8			$ 12
Subtotal [Member]
Present Value of Net Expected Loss and Loss Adjustment Expenses to be Paid [Roll Forward]
Beginning of Period, Net Expected Loss to be Paid After Recoveries for R&W					1,391
Economic loss development after recoveries for R&W		22		192	81		189
End of Period, Net Expected Loss to be Paid After Recoveries for R&W		1,326			1,326
Public Finance [Member]
Present Value of Net Expected Loss and Loss Adjustment Expenses to be Paid [Roll Forward]
Beginning of Period, Net Expected Loss to be Paid After Recoveries for R&W		903		352	809	[1]	348
Net expected loss to be paid on Radian Asset portfolio as of April 1, 2015				85			85
Economic loss development after recoveries for R&W		109		224	208		230
(Paid) Recovered Losses After Recoveries for R&W	[2]	(12)		(4)	(17)		(6)
End of Period, Net Expected Loss to be Paid After Recoveries for R&W		1,000	[1]	657	1,000	[1]	657
Public Finance [Member] | United States [Member]
Present Value of Net Expected Loss and Loss Adjustment Expenses to be Paid [Roll Forward]
Beginning of Period, Net Expected Loss to be Paid After Recoveries for R&W		864		310	771	[1]	303
Net expected loss to be paid on Radian Asset portfolio as of April 1, 2015				81			81
Economic loss development after recoveries for R&W		111		226	209		235
(Paid) Recovered Losses After Recoveries for R&W	[2]	(12)		(4)	(17)		(6)
End of Period, Net Expected Loss to be Paid After Recoveries for R&W		963	[1]	613	963	[1]	613
Public Finance [Member] | Non United States [Member]
Present Value of Net Expected Loss and Loss Adjustment Expenses to be Paid [Roll Forward]
Beginning of Period, Net Expected Loss to be Paid After Recoveries for R&W		39		42	38	[1]	45
Net expected loss to be paid on Radian Asset portfolio as of April 1, 2015				4			4
Economic loss development after recoveries for R&W		(2)		(2)	(1)		(5)
(Paid) Recovered Losses After Recoveries for R&W	[2]	0		0	0		0
End of Period, Net Expected Loss to be Paid After Recoveries for R&W		37	[1]	44	37	[1]	44
RMBS [Member] | United States [Member]
Present Value of Net Expected Loss and Loss Adjustment Expenses to be Paid [Roll Forward]
Beginning of Period, Net Expected Loss to be Paid After Recoveries for R&W		293		570	409	[1]	584
Net expected loss to be paid on Radian Asset portfolio as of April 1, 2015				4			4
Economic loss development after recoveries for R&W		(81)		(32)	(112)		(28)
(Paid) Recovered Losses After Recoveries for R&W	[2]	(20)		(18)	(105)		(36)
End of Period, Net Expected Loss to be Paid After Recoveries for R&W		192	[1]	524	192	[1]	524
RMBS [Member] | First Lien [Member] | United States [Member]
Present Value of Net Expected Loss and Loss Adjustment Expenses to be Paid [Roll Forward]
Beginning of Period, Net Expected Loss to be Paid After Recoveries for R&W		228		569	348	[1]	595
Net expected loss to be paid on Radian Asset portfolio as of April 1, 2015				3			3
Economic loss development after recoveries for R&W		(74)		(26)	(110)		(28)
(Paid) Recovered Losses After Recoveries for R&W	[2]	(76)		(25)	(160)		(49)
End of Period, Net Expected Loss to be Paid After Recoveries for R&W		78	[1]	521	78	[1]	521
RMBS [Member] | First Lien [Member] | Prime [Member] | United States [Member]
Present Value of Net Expected Loss and Loss Adjustment Expenses to be Paid [Roll Forward]
Beginning of Period, Net Expected Loss to be Paid After Recoveries for R&W		(1)		3	(2)	[1]	4
Net expected loss to be paid on Radian Asset portfolio as of April 1, 2015				0			0
Economic loss development after recoveries for R&W		0		(1)	0		(1)
(Paid) Recovered Losses After Recoveries for R&W	[2]	4		(1)	5		(2)
End of Period, Net Expected Loss to be Paid After Recoveries for R&W		3	[1]	1	3	[1]	1
RMBS [Member] | First Lien [Member] | Alt-A [Member] | United States [Member]
Present Value of Net Expected Loss and Loss Adjustment Expenses to be Paid [Roll Forward]
Beginning of Period, Net Expected Loss to be Paid After Recoveries for R&W		36		289	127	[1]	304
Net expected loss to be paid on Radian Asset portfolio as of April 1, 2015				7			7
Economic loss development after recoveries for R&W		(38)		(16)	(54)		(21)
(Paid) Recovered Losses After Recoveries for R&W	[2]	(94)		(15)	(169)		(25)
End of Period, Net Expected Loss to be Paid After Recoveries for R&W		(96)	[1]	265	(96)	[1]	265
RMBS [Member] | First Lien [Member] | Option ARM [Member] | United States [Member]
Present Value of Net Expected Loss and Loss Adjustment Expenses to be Paid [Roll Forward]
Beginning of Period, Net Expected Loss to be Paid After Recoveries for R&W		(47)		(16)	(28)	[1]	(16)
Net expected loss to be paid on Radian Asset portfolio as of April 1, 2015				0			0
Economic loss development after recoveries for R&W		(10)		(3)	(31)		1
(Paid) Recovered Losses After Recoveries for R&W	[2]	1		1	3		(3)
End of Period, Net Expected Loss to be Paid After Recoveries for R&W		(56)	[1]	(18)	(56)	[1]	(18)
RMBS [Member] | First Lien [Member] | Subprime [Member] | United States [Member]
Present Value of Net Expected Loss and Loss Adjustment Expenses to be Paid [Roll Forward]
Beginning of Period, Net Expected Loss to be Paid After Recoveries for R&W		240		293	251	[1]	303
Net expected loss to be paid on Radian Asset portfolio as of April 1, 2015				(4)			(4)
Economic loss development after recoveries for R&W		(26)		(6)	(25)		(7)
(Paid) Recovered Losses After Recoveries for R&W	[2]	13		(10)	1		(19)
End of Period, Net Expected Loss to be Paid After Recoveries for R&W		227	[1]	273	227	[1]	273
RMBS [Member] | Second Lien [Member] | United States [Member]
Present Value of Net Expected Loss and Loss Adjustment Expenses to be Paid [Roll Forward]
Beginning of Period, Net Expected Loss to be Paid After Recoveries for R&W		65		1	61	[1]	(11)
Net expected loss to be paid on Radian Asset portfolio as of April 1, 2015				1			1
Economic loss development after recoveries for R&W		(7)		(6)	(2)		0
(Paid) Recovered Losses After Recoveries for R&W	[2]	56		7	55		13
End of Period, Net Expected Loss to be Paid After Recoveries for R&W		114	[1]	3	114	[1]	3
Triple-X Life Insurance Transaction [Member]
Present Value of Net Expected Loss and Loss Adjustment Expenses to be Paid [Roll Forward]
Beginning of Period, Net Expected Loss to be Paid After Recoveries for R&W		102		165	99	[1]	161
Net expected loss to be paid on Radian Asset portfolio as of April 1, 2015				0			0
Economic loss development after recoveries for R&W		(2)		2	2		7
(Paid) Recovered Losses After Recoveries for R&W	[2]	0		(2)	(1)		(3)
End of Period, Net Expected Loss to be Paid After Recoveries for R&W		100	[1]	165	100	[1]	165
Student Loan [Member]
Present Value of Net Expected Loss and Loss Adjustment Expenses to be Paid [Roll Forward]
Beginning of Period, Net Expected Loss to be Paid After Recoveries for R&W		32		62	54	[1]	68
Net expected loss to be paid on Radian Asset portfolio as of April 1, 2015				0			0
Economic loss development after recoveries for R&W		(1)		1	(15)		(5)
(Paid) Recovered Losses After Recoveries for R&W	[2]	0		(5)	(8)		(5)
End of Period, Net Expected Loss to be Paid After Recoveries for R&W		31	[1]	58	31	[1]	58
Other structured finance [Member]
Present Value of Net Expected Loss and Loss Adjustment Expenses to be Paid [Roll Forward]
Beginning of Period, Net Expected Loss to be Paid After Recoveries for R&W		7		5	20	[1]	8
Net expected loss to be paid on Radian Asset portfolio as of April 1, 2015				101			101
Economic loss development after recoveries for R&W		(3)		(3)	(2)		(15)
(Paid) Recovered Losses After Recoveries for R&W	[2]	(1)		3	(15)		12
End of Period, Net Expected Loss to be Paid After Recoveries for R&W		3	[1]	106	3	[1]	106
Structured Finance [Member]
Present Value of Net Expected Loss and Loss Adjustment Expenses to be Paid [Roll Forward]
Beginning of Period, Net Expected Loss to be Paid After Recoveries for R&W		434		802	582	[1]	821
Net expected loss to be paid on Radian Asset portfolio as of April 1, 2015				105			105
Economic loss development after recoveries for R&W		(87)		(32)	(127)		(41)
(Paid) Recovered Losses After Recoveries for R&W	[2]	(21)		(22)	(129)		(32)
End of Period, Net Expected Loss to be Paid After Recoveries for R&W		326	[1]	853	326	[1]	853
Radian [Member]
Present Value of Net Expected Loss and Loss Adjustment Expenses to be Paid [Roll Forward]
Net expected loss to be paid on Radian Asset portfolio as of April 1, 2015		$ 0		$ (190)	$ 0		$ (190)
[1]	Includes expected LAE to be paid of $8 million as of June 30, 2016 and $12 million as of December 31, 2015.
[2]	Net of ceded paid losses, whether or not such amounts have been settled with reinsurers. Ceded paid losses are typically settled 45 days after the end of the reporting period. Such amounts are recorded in reinsurance recoverable on paid losses included in other assets. The Company paid $7 million and $5 million in loss adjustment expenses ("LAE") for Second Quarter 2016 and 2015, respectively, and $9 million and $9 million in LAE for Six Months 2016 and 2015, respectively.

Expected Loss to be Paid - Ne55

Expected Loss to be Paid - Net Expected Recoveries from Breaches of R&W Rollforward (Details) - RMBS [Member] - United States [Member] - USD ($) $ in Millions		Jun. 30, 2016	Dec. 31, 2015
Schedule of Expected Losses to be Paid [Line Items]
Future net R&W benefit	[1]	$ (58)	$ 79
First Lien [Member]
Schedule of Expected Losses to be Paid [Line Items]
Future net R&W benefit	[1]	(90)	0
Second Lien [Member]
Schedule of Expected Losses to be Paid [Line Items]
Future net R&W benefit	[1]	$ 32	$ 79
[1]	The Company’s agreements with R&W providers generally provide that, as the Company makes claim payments, the R&W providers reimburse it for those claims; if the Company later receives reimbursement through the transaction (for example, from excess spread), the Company repays the R&W providers. See the section “Breaches of Representations and Warranties” for information about the R&W agreements and eligible assets held in trust with respect to such agreements. When the Company projects receiving more reimbursements in the future than it projects paying in claims on transactions covered by R&W settlement agreements, the Company will have a net R&W payable.

Expected Loss to be Paid - Ne56

Expected Loss to be Paid - Net Expected Loss to be Paid and Net Economic Loss Development by Accounting Model (Details) - USD ($) $ in Millions		3 Months Ended			6 Months Ended
		Jun. 30, 2016		Jun. 30, 2015	Jun. 30, 2016		Jun. 30, 2015	Mar. 31, 2016	Dec. 31, 2015		Mar. 31, 2015	Dec. 31, 2014
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W		$ 1,326	[1]	$ 1,510	$ 1,326	[1]	$ 1,510	$ 1,337	$ 1,391	[1]	$ 1,154	$ 1,169
Economic loss development after recoveries for R&W		22		192	81		189
Subtotal [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W		1,326			1,326				1,391
Economic loss development after recoveries for R&W		22		192	81		189
Public Finance [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W		1,000	[1]	657	1,000	[1]	657	903	809	[1]	352	348
Economic loss development after recoveries for R&W		109		224	208		230
Public Finance [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W		963	[1]	613	963	[1]	613	864	771	[1]	310	303
Economic loss development after recoveries for R&W		111		226	209		235
Public Finance [Member] | Non United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W		37	[1]	44	37	[1]	44	39	38	[1]	42	45
Economic loss development after recoveries for R&W		(2)		(2)	(1)		(5)
RMBS [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W		192	[1]	524	192	[1]	524	293	409	[1]	570	584
Economic loss development after recoveries for R&W		(81)		(32)	(112)		(28)
RMBS [Member] | First Lien [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W		78	[1]	521	78	[1]	521	228	348	[1]	569	595
Economic loss development after recoveries for R&W		(74)		(26)	(110)		(28)
RMBS [Member] | First Lien [Member] | Prime [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W		3	[1]	1	3	[1]	1	(1)	(2)	[1]	3	4
Economic loss development after recoveries for R&W		0		(1)	0		(1)
RMBS [Member] | First Lien [Member] | Alt-A [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W		(96)	[1]	265	(96)	[1]	265	36	127	[1]	289	304
Economic loss development after recoveries for R&W		(38)		(16)	(54)		(21)
RMBS [Member] | First Lien [Member] | Option ARM [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W		(56)	[1]	(18)	(56)	[1]	(18)	(47)	(28)	[1]	(16)	(16)
Economic loss development after recoveries for R&W		(10)		(3)	(31)		1
RMBS [Member] | First Lien [Member] | Subprime [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W		227	[1]	273	227	[1]	273	240	251	[1]	293	303
Economic loss development after recoveries for R&W		(26)		(6)	(25)		(7)
RMBS [Member] | Second Lien [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W		114	[1]	3	114	[1]	3	65	61	[1]	1	(11)
Economic loss development after recoveries for R&W		(7)		(6)	(2)		0
Triple-X Life Insurance Transaction [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W		100	[1]	165	100	[1]	165	102	99	[1]	165	161
Economic loss development after recoveries for R&W		(2)		2	2		7
Student Loan [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W		31	[1]	58	31	[1]	58	32	54	[1]	62	68
Economic loss development after recoveries for R&W		(1)		1	(15)		(5)
Other structured finance [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W		3	[1]	106	3	[1]	106	7	20	[1]	5	8
Economic loss development after recoveries for R&W		(3)		(3)	(2)		(15)
Structured Finance [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W		326	[1]	853	326	[1]	853	$ 434	582	[1]	$ 802	$ 821
Economic loss development after recoveries for R&W		(87)		(32)	(127)		(41)
Financial Guarantee Accounted for as Insurance Contracts [Member] | Subtotal [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W		1,208			1,208				1,239
Economic loss development after recoveries for R&W		40		207	101		219
Financial Guarantee Accounted for as Insurance Contracts [Member] | Public Finance [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W		1,000			1,000				809
Economic loss development after recoveries for R&W		109		230	208		236
Financial Guarantee Accounted for as Insurance Contracts [Member] | Public Finance [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W		963			963				771
Economic loss development after recoveries for R&W		111		232	209		241
Financial Guarantee Accounted for as Insurance Contracts [Member] | Public Finance [Member] | Non United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W		37			37				38
Economic loss development after recoveries for R&W		(2)		(2)	(1)		(5)
Financial Guarantee Accounted for as Insurance Contracts [Member] | RMBS [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W		50			50				251
Economic loss development after recoveries for R&W		(66)		(24)	(97)		(16)
Financial Guarantee Accounted for as Insurance Contracts [Member] | RMBS [Member] | First Lien [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W		(18)			(18)				238
Economic loss development after recoveries for R&W		(65)		(17)	(98)		(17)
Financial Guarantee Accounted for as Insurance Contracts [Member] | RMBS [Member] | First Lien [Member] | Prime [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W		3			3				2
Economic loss development after recoveries for R&W		0		(1)	0		0
Financial Guarantee Accounted for as Insurance Contracts [Member] | RMBS [Member] | First Lien [Member] | Alt-A [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W		(115)			(115)				110
Economic loss development after recoveries for R&W		(39)		(12)	(56)		(10)
Financial Guarantee Accounted for as Insurance Contracts [Member] | RMBS [Member] | First Lien [Member] | Option ARM [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W		(51)			(51)				(27)
Economic loss development after recoveries for R&W		(9)		(4)	(28)		(3)
Financial Guarantee Accounted for as Insurance Contracts [Member] | RMBS [Member] | First Lien [Member] | Subprime [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W		145			145				153
Economic loss development after recoveries for R&W		(17)		0	(14)		(4)
Financial Guarantee Accounted for as Insurance Contracts [Member] | RMBS [Member] | Second Lien [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W		68			68				13
Economic loss development after recoveries for R&W		(1)		(7)	1		1
Financial Guarantee Accounted for as Insurance Contracts [Member] | Triple-X Life Insurance Transaction [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W		89			89				88
Economic loss development after recoveries for R&W		(1)		1	2		5
Financial Guarantee Accounted for as Insurance Contracts [Member] | Student Loan [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W		31			31				54
Economic loss development after recoveries for R&W		(1)		1	(15)		(5)
Financial Guarantee Accounted for as Insurance Contracts [Member] | Other structured finance [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W		38			38				37
Economic loss development after recoveries for R&W		(1)		(1)	3		(1)
Financial Guarantee Accounted for as Insurance Contracts [Member] | Structured Finance [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W		208			208				430
Economic loss development after recoveries for R&W		(69)		(23)	(107)		(17)
Financial Guaranty Variable Interest Entities and Other [Member] | Subtotal [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W	[2]	114			114				136
Economic loss development after recoveries for R&W	[3]	(7)		(1)	(3)		1
Financial Guaranty Variable Interest Entities and Other [Member] | Public Finance [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W	[2]	0			0				0
Economic loss development after recoveries for R&W	[3]	0		0	0		0
Financial Guaranty Variable Interest Entities and Other [Member] | Public Finance [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W	[2]	0			0				0
Economic loss development after recoveries for R&W	[3]	0		0	0		0
Financial Guaranty Variable Interest Entities and Other [Member] | Public Finance [Member] | Non United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W	[2]	0			0				0
Economic loss development after recoveries for R&W	[3]	0		0	0		0
Financial Guaranty Variable Interest Entities and Other [Member] | RMBS [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W	[2]	113			113				120
Economic loss development after recoveries for R&W	[3]	(6)		(2)	(2)		1
Financial Guaranty Variable Interest Entities and Other [Member] | RMBS [Member] | First Lien [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W	[2]	70			70				76
Economic loss development after recoveries for R&W	[3]	0		(2)	1		2
Financial Guaranty Variable Interest Entities and Other [Member] | RMBS [Member] | First Lien [Member] | Prime [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W	[2]	0			0				0
Economic loss development after recoveries for R&W	[3]	0		0	0		0
Financial Guaranty Variable Interest Entities and Other [Member] | RMBS [Member] | First Lien [Member] | Alt-A [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W	[2]	20			20				17
Economic loss development after recoveries for R&W	[3]	2		(1)	3		(1)
Financial Guaranty Variable Interest Entities and Other [Member] | RMBS [Member] | First Lien [Member] | Option ARM [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W	[2]	0			0				0
Economic loss development after recoveries for R&W	[3]	0		0	0		0
Financial Guaranty Variable Interest Entities and Other [Member] | RMBS [Member] | First Lien [Member] | Subprime [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W	[2]	50			50				59
Economic loss development after recoveries for R&W	[3]	(2)		(1)	(2)		3
Financial Guaranty Variable Interest Entities and Other [Member] | RMBS [Member] | Second Lien [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W	[2]	43			43				44
Economic loss development after recoveries for R&W	[3]	(6)		0	(3)		(1)
Financial Guaranty Variable Interest Entities and Other [Member] | Triple-X Life Insurance Transaction [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W	[2]	0			0				0
Economic loss development after recoveries for R&W	[3]	0		0	0		0
Financial Guaranty Variable Interest Entities and Other [Member] | Student Loan [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W	[2]	0			0				0
Economic loss development after recoveries for R&W	[3]	0		0	0		0
Financial Guaranty Variable Interest Entities and Other [Member] | Other structured finance [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W	[2]	1			1				16
Economic loss development after recoveries for R&W	[3]	(1)		1	(1)		0
Financial Guaranty Variable Interest Entities and Other [Member] | Structured Finance [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W	[2]	114			114				136
Economic loss development after recoveries for R&W	[3]	(7)		(1)	(3)		1
Financial Guarantee Accounted for as Credit Derivatives [Member] | Subtotal [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W	[4]	4			4				16
Economic loss development after recoveries for R&W	[5]	(11)		(14)	(17)		(31)
Financial Guarantee Accounted for as Credit Derivatives [Member] | Public Finance [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W	[4]	0			0				0
Economic loss development after recoveries for R&W	[5]	0		(6)	0		(6)
Financial Guarantee Accounted for as Credit Derivatives [Member] | Public Finance [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W	[4]	0			0				0
Economic loss development after recoveries for R&W	[5]	0		(6)	0		(6)
Financial Guarantee Accounted for as Credit Derivatives [Member] | Public Finance [Member] | Non United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W	[4]	0			0				0
Economic loss development after recoveries for R&W	[5]	0		0	0		0
Financial Guarantee Accounted for as Credit Derivatives [Member] | RMBS [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W	[4]	29			29				38
Economic loss development after recoveries for R&W	[5]	(9)		(6)	(13)		(13)
Financial Guarantee Accounted for as Credit Derivatives [Member] | RMBS [Member] | First Lien [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W	[4]	26			26				34
Economic loss development after recoveries for R&W	[5]	(9)		(7)	(13)		(13)
Financial Guarantee Accounted for as Credit Derivatives [Member] | RMBS [Member] | First Lien [Member] | Prime [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W	[4]	0			0				(4)
Economic loss development after recoveries for R&W	[5]	0		0	0		(1)
Financial Guarantee Accounted for as Credit Derivatives [Member] | RMBS [Member] | First Lien [Member] | Alt-A [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W	[4]	(1)			(1)				0
Economic loss development after recoveries for R&W	[5]	(1)		(3)	(1)		(10)
Financial Guarantee Accounted for as Credit Derivatives [Member] | RMBS [Member] | First Lien [Member] | Option ARM [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W	[4]	(5)			(5)				(1)
Economic loss development after recoveries for R&W	[5]	(1)		1	(3)		4
Financial Guarantee Accounted for as Credit Derivatives [Member] | RMBS [Member] | First Lien [Member] | Subprime [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W	[4]	32			32				39
Economic loss development after recoveries for R&W	[5]	(7)		(5)	(9)		(6)
Financial Guarantee Accounted for as Credit Derivatives [Member] | RMBS [Member] | Second Lien [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W	[4]	3			3				4
Economic loss development after recoveries for R&W	[5]	0		1	0		0
Financial Guarantee Accounted for as Credit Derivatives [Member] | Triple-X Life Insurance Transaction [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W	[4]	11			11				11
Economic loss development after recoveries for R&W	[5]	(1)		1	0		2
Financial Guarantee Accounted for as Credit Derivatives [Member] | Student Loan [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W	[4]	0			0				0
Economic loss development after recoveries for R&W	[5]	0		0	0		0
Financial Guarantee Accounted for as Credit Derivatives [Member] | Other structured finance [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W	[4]	(36)			(36)				(33)
Economic loss development after recoveries for R&W	[5]	(1)		(3)	(4)		(14)
Financial Guarantee Accounted for as Credit Derivatives [Member] | Structured Finance [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net expected loss to be paid after recoveries for R&W	[4]	4			4				$ 16
Economic loss development after recoveries for R&W	[5]	$ (11)		$ (8)	$ (17)		$ (25)
[1]	Includes expected LAE to be paid of $8 million as of June 30, 2016 and $12 million as of December 31, 2015.
[2]	Refer to Note 9, Consolidated Variable Interest Entities.
[3]	Refer to Note 9, Consolidated Variable Interest Entities.
[4]	Refer to Note 8, Financial Guaranty Contracts Accounted for as Credit Derivatives.
[5]	Refer to Note 8, Financial Guaranty Contracts Accounted for as Credit Derivatives.

Expected Loss to be Paid - Liqu

Expected Loss to be Paid - Liquidation Rates and Key Assumptions in Base Case Expected Loss First Lien RMBS (Details)		3 Months Ended	6 Months Ended	12 Months Ended
		Mar. 31, 2016	Jun. 30, 2016	Dec. 31, 2015
Financing Receivable, Modified in Previous 12 Months [Member] | Subprime [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liquidation Rate		25.00%	25.00%	25.00%
Financing Receivable, Modified in Previous 12 Months [Member] | Alt-A and Prime [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liquidation Rate		25.00%	25.00%	25.00%
Financing Receivable, Modified in Previous 12 Months [Member] | Option ARM [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liquidation Rate		25.00%	25.00%	25.00%
Financing Receivable, Delinquent in the Previous 12 Months [Member] | Subprime [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liquidation Rate		25.00%	25.00%	25.00%
Financing Receivable, Delinquent in the Previous 12 Months [Member] | Alt-A and Prime [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liquidation Rate		25.00%	25.00%	25.00%
Financing Receivable, Delinquent in the Previous 12 Months [Member] | Option ARM [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liquidation Rate		25.00%	25.00%	25.00%
Financing Receivables, 30 to 59 Days Past Due [Member] | Subprime [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liquidation Rate		45.00%	45.00%	45.00%
Financing Receivables, 30 to 59 Days Past Due [Member] | Alt-A and Prime [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liquidation Rate		35.00%	35.00%	35.00%
Financing Receivables, 30 to 59 Days Past Due [Member] | Option ARM [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liquidation Rate		40.00%	40.00%	40.00%
Financing Receivables, 60 to 89 Days Past Due [Member] | Subprime [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liquidation Rate		55.00%	50.00%	55.00%
Financing Receivables, 60 to 89 Days Past Due [Member] | Alt-A and Prime [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liquidation Rate		45.00%	45.00%	45.00%
Financing Receivables, 60 to 89 Days Past Due [Member] | Option ARM [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liquidation Rate		50.00%	50.00%	50.00%
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Subprime [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liquidation Rate		60.00%	55.00%	60.00%
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Alt-A and Prime [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liquidation Rate		55.00%	55.00%	55.00%
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Option ARM [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liquidation Rate		60.00%	60.00%	60.00%
Financing Receivables, Bankruptcy [Member] | Subprime [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liquidation Rate		40.00%	40.00%	40.00%
Financing Receivables, Bankruptcy [Member] | Alt-A and Prime [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liquidation Rate		45.00%	45.00%	45.00%
Financing Receivables, Bankruptcy [Member] | Option ARM [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liquidation Rate		50.00%	50.00%	50.00%
Financing Receivable, Foreclosure [Member] | Subprime [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liquidation Rate		70.00%	65.00%	70.00%
Financing Receivable, Foreclosure [Member] | Alt-A and Prime [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liquidation Rate		65.00%	65.00%	65.00%
Financing Receivable, Foreclosure [Member] | Option ARM [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liquidation Rate		70.00%	70.00%	70.00%
Financing Receivable, Real Estate Owned [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liquidation Rate		100.00%	100.00%	100.00%
United States [Member] | Alt-A [Member] | RMBS [Member]
Schedule of Expected Losses to be Paid [Line Items]
Period until intermediate CDR	[1]	48 months	48 months	48 months
Final CPR	[1],[2]	15.00%	15.00%	15.00%
United States [Member] | Alt-A [Member] | 2005 and prior [Member] | RMBS [Member]
Schedule of Expected Losses to be Paid [Line Items]
Initial loss severity	[1]	60.00%	60.00%	60.00%
United States [Member] | Alt-A [Member] | 2006 [Member] | RMBS [Member]
Schedule of Expected Losses to be Paid [Line Items]
Initial loss severity	[1]	80.00%	80.00%	70.00%
United States [Member] | Alt-A [Member] | 2007 [Member] | RMBS [Member]
Schedule of Expected Losses to be Paid [Line Items]
Initial loss severity	[1]	65.00%	70.00%	65.00%
United States [Member] | Alt-A [Member] | Minimum [Member] | RMBS [Member]
Schedule of Expected Losses to be Paid [Line Items]
Plateau CDR	[1]	0.90%	0.90%	1.70%
Intermediate CDR	[1]	0.20%	0.20%	0.30%
Final CDR	[1]	0.00%	0.00%	0.10%
Initial CPR	[1]	2.70%	3.50%	2.70%
United States [Member] | Alt-A [Member] | Maximum [Member] | RMBS [Member]
Schedule of Expected Losses to be Paid [Line Items]
Plateau CDR	[1]	27.80%	27.00%	26.40%
Intermediate CDR	[1]	5.60%	5.40%	5.30%
Final CDR	[1]	1.40%	1.30%	1.30%
Initial CPR	[1]	31.60%	29.30%	32.50%
United States [Member] | Alt-A [Member] | Weighted Average [Member] | RMBS [Member]
Schedule of Expected Losses to be Paid [Line Items]
Plateau CDR	[1]	6.40%	6.10%	6.40%
Intermediate CDR	[1]	1.30%	1.20%	1.30%
Final CDR	[1]	0.30%	0.30%	0.30%
Initial CPR	[1]	11.80%	11.00%	11.50%
United States [Member] | Option ARM [Member] | RMBS [Member]
Schedule of Expected Losses to be Paid [Line Items]
Period until intermediate CDR	[1]	48 months	48 months	48 months
Final CPR	[1],[2]	15.00%	15.00%	15.00%
United States [Member] | Option ARM [Member] | 2005 and prior [Member] | RMBS [Member]
Schedule of Expected Losses to be Paid [Line Items]
Initial loss severity	[1]	60.00%	60.00%	60.00%
United States [Member] | Option ARM [Member] | 2006 [Member] | RMBS [Member]
Schedule of Expected Losses to be Paid [Line Items]
Initial loss severity	[1]	70.00%	70.00%	70.00%
United States [Member] | Option ARM [Member] | 2007 [Member] | RMBS [Member]
Schedule of Expected Losses to be Paid [Line Items]
Initial loss severity	[1]	65.00%	75.00%	65.00%
United States [Member] | Option ARM [Member] | Minimum [Member] | RMBS [Member]
Schedule of Expected Losses to be Paid [Line Items]
Plateau CDR	[1]	3.40%	3.20%	3.50%
Intermediate CDR	[1]	0.70%	0.60%	0.70%
Final CDR	[1]	0.20%	0.20%	0.20%
Initial CPR	[1]	2.00%	2.00%	1.50%
United States [Member] | Option ARM [Member] | Maximum [Member] | RMBS [Member]
Schedule of Expected Losses to be Paid [Line Items]
Plateau CDR	[1]	10.60%	10.10%	10.30%
Intermediate CDR	[1]	2.10%	2.00%	2.10%
Final CDR	[1]	0.50%	0.50%	0.50%
Initial CPR	[1]	13.70%	13.20%	10.90%
United States [Member] | Option ARM [Member] | Weighted Average [Member] | RMBS [Member]
Schedule of Expected Losses to be Paid [Line Items]
Plateau CDR	[1]	7.80%	7.40%	7.80%
Intermediate CDR	[1]	1.60%	1.50%	1.60%
Final CDR	[1]	0.40%	0.30%	0.40%
Initial CPR	[1]	5.50%	5.70%	5.10%
United States [Member] | Subprime [Member] | RMBS [Member]
Schedule of Expected Losses to be Paid [Line Items]
Period until intermediate CDR	[1]	48 months	48 months	48 months
Final CPR	[1],[2]	15.00%	15.00%	15.00%
United States [Member] | Subprime [Member] | 2005 and prior [Member] | RMBS [Member]
Schedule of Expected Losses to be Paid [Line Items]
Initial loss severity	[1]	80.00%	80.00%	75.00%
United States [Member] | Subprime [Member] | 2006 [Member] | RMBS [Member]
Schedule of Expected Losses to be Paid [Line Items]
Initial loss severity	[1]	90.00%	90.00%	90.00%
United States [Member] | Subprime [Member] | 2007 [Member] | RMBS [Member]
Schedule of Expected Losses to be Paid [Line Items]
Initial loss severity	[1]	90.00%	90.00%	90.00%
United States [Member] | Subprime [Member] | Minimum [Member] | RMBS [Member]
Schedule of Expected Losses to be Paid [Line Items]
Plateau CDR	[1]	4.20%	4.40%	4.70%
Intermediate CDR	[1]	0.80%	0.90%	0.90%
Final CDR	[1]	0.20%	0.20%	0.20%
Initial CPR	[1]	0.30%	0.60%	0.00%
United States [Member] | Subprime [Member] | Maximum [Member] | RMBS [Member]
Schedule of Expected Losses to be Paid [Line Items]
Plateau CDR	[1]	14.40%	12.70%	13.20%
Intermediate CDR	[1]	2.90%	2.50%	2.60%
Final CDR	[1]	0.70%	0.60%	0.70%
Initial CPR	[1]	9.20%	11.30%	10.10%
United States [Member] | Subprime [Member] | Weighted Average [Member] | RMBS [Member]
Schedule of Expected Losses to be Paid [Line Items]
Plateau CDR	[1]	9.40%	8.50%	9.50%
Intermediate CDR	[1]	1.90%	1.70%	1.90%
Final CDR	[1]	0.40%	0.40%	0.40%
Initial CPR	[1]	4.20%	4.90%	3.60%
First Lien [Member] | United States [Member] | RMBS [Member]
Schedule of Expected Losses to be Paid [Line Items]
Projected loss assumptions, Final CDR, Period for voluntary prepayments to continue			12 months
Base Scenario [Member] | First Lien [Member] | United States [Member] | RMBS [Member]
Schedule of Expected Losses to be Paid [Line Items]
Projected loss assumptions, Final CDR, Period for voluntary prepayments to continue			7 years
Final CPR			15.00%
[1]	Represents variables for most heavily weighted scenario (the “base case”).
[2]	For transactions where the initial CPR is higher than the final CPR, the initial CPR is held constant and the final CPR is not used.

Expected Loss to be Paid - Key

Expected Loss to be Paid - Key Assumptions in Base Case Expected Loss Second Lien RMBS (Details) - scenario		3 Months Ended	6 Months Ended	12 Months Ended
		Mar. 31, 2016	Jun. 30, 2016	Dec. 31, 2015
Minimum [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liquidation rate for bankruptcy delinquent category		25.00%	25.00%	10.00%
Maximum [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liquidation rate for bankruptcy delinquent category		100.00%	100.00%	100.00%
RMBS [Member] | United States [Member] | Home Equity Line of Credit [Member]
Schedule of Expected Losses to be Paid [Line Items]
Expected period until final CDR	[1]	34 months	34 months	34 months	[2]
RMBS [Member] | United States [Member] | Home Equity Line of Credit [Member] | Minimum [Member]
Schedule of Expected Losses to be Paid [Line Items]
Plateau CDR	[1]	5.30%	2.50%	4.90%
Final CDR	[1]	0.50%	0.50%	0.50%
Initial CPR	[1],[2]	11.00%	11.00%	10.90%
Final CPR	[1],[2]	10.00%	10.00%	10.00%
Loss severity	[1]	98.00%	98.00%	98.00%
RMBS [Member] | United States [Member] | Home Equity Line of Credit [Member] | Maximum [Member]
Schedule of Expected Losses to be Paid [Line Items]
Plateau CDR	[1]	26.10%	26.30%	23.50%
Final CDR	[1]	3.20%	3.20%	3.20%
Initial CPR		14.90%	15.40%
Final CPR	[1],[2]	15.00%	15.40%	15.00%
RMBS [Member] | United States [Member] | Home Equity Line of Credit [Member] | Weighted Average [Member]
Schedule of Expected Losses to be Paid [Line Items]
Plateau CDR	[1]	11.90%	12.60%	10.30%
Final CDR	[1]	1.20%	1.20%	1.20%
Initial CPR	[1]	11.10%	11.10%
Final CPR	[1],[2]	13.30%	13.30%	13.30%
RMBS [Member] | United States [Member] | Subprime [Member]
Schedule of Expected Losses to be Paid [Line Items]
Period until intermediate CDR	[3]	48 months	48 months	48 months
Final CPR	[3],[4]	15.00%	15.00%	15.00%
RMBS [Member] | United States [Member] | Subprime [Member] | Minimum [Member]
Schedule of Expected Losses to be Paid [Line Items]
Plateau CDR	[3]	4.20%	4.40%	4.70%
Final CDR	[3]	0.20%	0.20%	0.20%
Initial CPR	[3]	0.30%	0.60%	0.00%
RMBS [Member] | United States [Member] | Subprime [Member] | Maximum [Member]
Schedule of Expected Losses to be Paid [Line Items]
Plateau CDR	[3]	14.40%	12.70%	13.20%
Final CDR	[3]	0.70%	0.60%	0.70%
Initial CPR	[3]	9.20%	11.30%	10.10%
RMBS [Member] | United States [Member] | Subprime [Member] | Weighted Average [Member]
Schedule of Expected Losses to be Paid [Line Items]
Plateau CDR	[3]	9.40%	8.50%	9.50%
Final CDR	[3]	0.40%	0.40%	0.40%
Initial CPR	[3]	4.20%	4.90%	3.60%
Financing Receivable, Modified in Previous 12 Months [Member] | Alt-A and Prime [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liquidation Rate		25.00%	25.00%	25.00%
Second Lien [Member] | RMBS [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Loss recovery assumption (as a percent)		2.00%	2.00%	2.00%
Number of scenarios weighted in estimating expected losses			5	5
Second Lien [Member] | RMBS [Member] | United States [Member] | Home Equity Line of Credit and Closed-end Mortgage [Member]
Schedule of Expected Losses to be Paid [Line Items]
Final CPR		15.00%	15.00%	15.00%
First Lien [Member] | RMBS [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Number of scenarios weighted in estimating expected losses			5
Projected loss assumptions, Final CDR, Period for voluntary prepayments to continue			12 months
Base Scenario [Member] | First Lien [Member] | RMBS [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Final CPR			15.00%
Projected loss assumptions, Final CDR, Period for voluntary prepayments to continue			7 years
[1]	Represents variables for most heavily weighted scenario (the “base case”).
[2]	For transactions where the initial CPR is higher than the final CPR, the initial CPR is held constant and the final CPR is not used.
[3]	Represents variables for most heavily weighted scenario (the “base case”).
[4]	For transactions where the initial CPR is higher than the final CPR, the initial CPR is held constant and the final CPR is not used.

Expected Loss to be Paid - Narr

Expected Loss to be Paid - Narrative (Details)		Feb. 04, 2015USD ($)	Jun. 30, 2016USD ($)Transaction		Jun. 30, 2015USD ($)	Jun. 30, 2016USD ($)TransactionCounterpartyCurvePaymentscenario		Jun. 30, 2015USD ($)	Dec. 31, 2015USD ($)scenario		Mar. 31, 2016USD ($)	Mar. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Jan. 15, 2013USD ($)	Nov. 26, 2012USD ($)	May 31, 2012USD ($)Transaction
Schedule of Expected Losses to be Paid [Line Items]
Loss and LAE Reserve paid			$ 7,000,000		$ 5,000,000	$ 9,000,000		$ 9,000,000
Liability for unpaid claims and claims adjustment expense, net largest single loss			1,326,000,000	[1]	1,510,000,000	1,326,000,000	[1]	1,510,000,000	$ 1,391,000,000	[1]	$ 1,337,000,000	$ 1,154,000,000	$ 1,169,000,000
Economic loss development after recoveries for R&W			22,000,000		192,000,000	81,000,000		189,000,000
Net par amount outstanding			$ 329,864,000,000	[2]		$ 329,864,000,000	[2]		$ 358,571,000,000	[3]
Minimum [Member]
Schedule of Expected Losses to be Paid [Line Items]
Discount factor (as a percent)						0.00%			0.00%
Liquidation rate for bankruptcy delinquent category			25.00%			25.00%			10.00%		25.00%
Maximum [Member]
Schedule of Expected Losses to be Paid [Line Items]
Discount factor (as a percent)						2.46%			3.25%
Liquidation rate for bankruptcy delinquent category			100.00%			100.00%			100.00%		100.00%
Puerto Rico [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net par amount outstanding			$ 5,054,000,000			$ 5,054,000,000			$ 5,053,000,000
RMBS [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Estimated benefit from loan repurchases related to breaches of R&W included in net expected loss estimates	[4]		(58,000,000)			$ (58,000,000)			79,000,000
Guarantor obligations, aggregate lifetime collateral losses, number of counterparties with collateralized by eligible assets held in trust | Counterparty						2
Liability for unpaid claims and claims adjustment expense, net largest single loss			192,000,000	[1]	524,000,000	$ 192,000,000	[1]	524,000,000	409,000,000	[1]	$ 293,000,000	570,000,000	584,000,000
Economic loss development after recoveries for R&W			(81,000,000)		(32,000,000)	(112,000,000)		(28,000,000)
Net par amount outstanding			$ 6,082,000,000			$ 6,082,000,000			$ 7,067,000,000
RMBS [Member] | United States [Member] | Subprime [Member]
Schedule of Expected Losses to be Paid [Line Items]
Final CPR	[5],[6]		15.00%			15.00%			15.00%		15.00%
RMBS [Member] | United States [Member] | Option ARM [Member]
Schedule of Expected Losses to be Paid [Line Items]
Final CPR	[5],[6]		15.00%			15.00%			15.00%		15.00%
RMBS [Member] | United States [Member] | Alt-A [Member]
Schedule of Expected Losses to be Paid [Line Items]
Final CPR	[5],[6]		15.00%			15.00%			15.00%		15.00%
RMBS [Member] | United States [Member] | Minimum [Member] | HELOCs [Member]
Schedule of Expected Losses to be Paid [Line Items]
Final CPR	[7],[8]		10.00%			10.00%			10.00%		10.00%
RMBS [Member] | United States [Member] | Maximum [Member] | HELOCs [Member]
Schedule of Expected Losses to be Paid [Line Items]
Final CPR	[7],[8]		15.40%			15.40%			15.00%		15.00%
HELOCs [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Initial period for which borrower can pay only interest payments						10 years
Trust Preferred Securities (TruPS) [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net par amount outstanding			$ 3,255,000,000			$ 3,255,000,000			$ 4,379,000,000
Other structured finance [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liability for unpaid claims and claims adjustment expense, net largest single loss			3,000,000	[1]	106,000,000	3,000,000	[1]	106,000,000	20,000,000	[1]	$ 7,000,000	5,000,000	8,000,000
Economic loss development after recoveries for R&W			(3,000,000)		(3,000,000)	(2,000,000)		(15,000,000)
Net par amount outstanding			16,451,000,000			16,451,000,000			21,114,000,000
Triple-X Life Insurance Transaction [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liability for unpaid claims and claims adjustment expense, net largest single loss			100,000,000	[1]	165,000,000	100,000,000	[1]	165,000,000	99,000,000	[1]	102,000,000	165,000,000	161,000,000
Economic loss development after recoveries for R&W			(2,000,000)		2,000,000	2,000,000		7,000,000
Net par amount outstanding			2,189,000,000			2,189,000,000			2,750,000,000
Student Loan [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liability for unpaid claims and claims adjustment expense, net largest single loss			31,000,000	[1]	58,000,000	31,000,000	[1]	58,000,000	54,000,000	[1]	32,000,000	62,000,000	68,000,000
Economic loss development after recoveries for R&W			(1,000,000)		1,000,000	(15,000,000)		(5,000,000)
Net par amount outstanding			1,645,000,000			1,645,000,000			1,818,000,000
Other Structured Finance and TruPS [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liability for unpaid claims and claims adjustment expense, net largest single loss			3,000,000			3,000,000
Economic loss development after recoveries for R&W			(3,000,000)			(2,000,000)
Public Finance [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liability for unpaid claims and claims adjustment expense, net largest single loss			1,000,000,000	[1]	657,000,000	1,000,000,000	[1]	657,000,000	809,000,000	[1]	903,000,000	352,000,000	348,000,000
Economic loss development after recoveries for R&W			109,000,000		224,000,000	208,000,000		230,000,000
Public Finance [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liability for unpaid claims and claims adjustment expense, net largest single loss			963,000,000	[1]	613,000,000	963,000,000	[1]	613,000,000	771,000,000	[1]	864,000,000	310,000,000	303,000,000
Economic loss development after recoveries for R&W			111,000,000		226,000,000	209,000,000		235,000,000
Net par amount outstanding			272,114,000,000	[2],[9]		272,114,000,000	[2],[9]		291,866,000,000	[3]
Public Finance Stockton Pension Oblgiation Bonds [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net par amount outstanding			115,000,000			115,000,000
Non-Infrastructure Public Finance [Member] | Spain [Member] | Sovereign and Sub Sovereign [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net par amount outstanding			366,000,000			366,000,000
Non-Infrastructure Public Finance [Member] | Portugal [Member] | Sovereign and Sub Sovereign [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net par amount outstanding			80,000,000			80,000,000
Non-Infrastructure Public Finance [Member] | Spain, Hungry and Portugal [Member] | Sovereign and Sub Sovereign [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liability for unpaid claims and claims adjustment expense, net largest single loss			34,000,000			34,000,000
Economic loss development after recoveries for R&W			(2,000,000)			(1,000,000)
Guarantor Obligations, Group One [Member] | Deutsche Bank [Member] | RMBS [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Number of claims agreed on to be reimbursed | Transaction																8
BIG [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net par amount outstanding			14,790,000,000			14,790,000,000			15,183,000,000
BIG [Member] | Puerto Rico [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net par amount outstanding			5,100,000,000			5,100,000,000
BIG [Member] | RMBS [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net par amount outstanding			3,427,000,000			3,427,000,000			3,973,000,000
BIG [Member] | Trust Preferred Securities (TruPS) [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net par amount outstanding			563,000,000			563,000,000			806,000,000
BIG [Member] | Other structured finance [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net par amount outstanding			828,000,000			828,000,000			863,000,000
BIG [Member] | Triple-X Life Insurance Transaction [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net par amount outstanding			$ 216,000,000			$ 216,000,000			216,000,000
Insured financial obligations, transactions related BIG | Transaction			2			2
BIG [Member] | Student Loan [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net par amount outstanding			$ 110,000,000			$ 110,000,000			163,000,000
BIG [Member] | Public Finance [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net par amount outstanding			8,268,000,000	[9]		8,268,000,000	[9]		7,784,000,000
BIG [Member] | Non-Infrastructure Public Finance [Member] | Hungary [Member] | Sovereign and Sub Sovereign [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net par amount outstanding			265,000,000			265,000,000
BIG [Member] | Parkway East [Member] | Public Finance [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net par amount outstanding			$ 20,000,000			$ 20,000,000
First Lien [Member] | RMBS [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Number of delinquent payments | Payment						2
Projected loss assumptions, CDR, plateau rate, projection period						36 months
Projected loss assumptions, Final CDR, Period for voluntary prepayments to continue						12 months
Intermediate conditional default rate (as a percent)			5.00%			5.00%
Number of scenarios weighted in estimating expected losses | scenario						5
Estimated benefit from loan repurchases related to breaches of R&W included in net expected loss estimates	[4]		$ (90,000,000)			$ (90,000,000)			0
Liability for unpaid claims and claims adjustment expense, net largest single loss			78,000,000	[1]	521,000,000	78,000,000	[1]	521,000,000	348,000,000	[1]	228,000,000	569,000,000	595,000,000
Economic loss development after recoveries for R&W			(74,000,000)		(26,000,000)	(110,000,000)		(28,000,000)
First Lien [Member] | RMBS [Member] | United States [Member] | Subprime [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liability for unpaid claims and claims adjustment expense, net largest single loss			227,000,000	[1]	273,000,000	227,000,000	[1]	273,000,000	251,000,000	[1]	240,000,000	293,000,000	303,000,000
Economic loss development after recoveries for R&W			(26,000,000)		(6,000,000)	(25,000,000)		(7,000,000)
Net par amount outstanding			3,193,000,000			3,193,000,000			3,457,000,000
First Lien [Member] | RMBS [Member] | United States [Member] | Prime [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liability for unpaid claims and claims adjustment expense, net largest single loss			3,000,000	[1]	1,000,000	3,000,000	[1]	1,000,000	(2,000,000)	[1]	(1,000,000)	3,000,000	4,000,000
Economic loss development after recoveries for R&W			0		(1,000,000)	0		(1,000,000)
Net par amount outstanding			237,000,000			237,000,000			445,000,000
First Lien [Member] | RMBS [Member] | United States [Member] | Option ARM [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liability for unpaid claims and claims adjustment expense, net largest single loss			(56,000,000)	[1]	(18,000,000)	(56,000,000)	[1]	(18,000,000)	(28,000,000)	[1]	(47,000,000)	(16,000,000)	(16,000,000)
Economic loss development after recoveries for R&W			(10,000,000)		(3,000,000)	(31,000,000)		1,000,000
Net par amount outstanding			186,000,000			186,000,000			252,000,000
First Lien [Member] | RMBS [Member] | United States [Member] | Alt-A [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liability for unpaid claims and claims adjustment expense, net largest single loss			(96,000,000)	[1]	265,000,000	(96,000,000)	[1]	265,000,000	127,000,000	[1]	$ 36,000,000	289,000,000	304,000,000
Economic loss development after recoveries for R&W			(38,000,000)		(16,000,000)	(54,000,000)		(21,000,000)
Net par amount outstanding			$ 1,090,000,000			$ 1,090,000,000			1,353,000,000
First Lien [Member] | Base Scenario [Member] | RMBS [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Final CPR			15.00%			15.00%
Projected loss assumptions, CDR, plateau rate, projection period						36 months
Period from plateau to intermediate conditional default rate (in months)						12 months
Period of constant intermediate conditional default rate (in months)						36 months
Intermediate conditional default rate as a percentage of plateau conditional default rate						20.00%
Final conditional default rate as a percentage of plateau conditional default rate						5.00%
Default from delinquentor rate, term						36 months
Guarantor obligations, default period currently performing						36 months
Projected loss assumptions, loss severity, subsequent period						18 months
Estimated loss severity rate, one through six months (as a percent)						18 months
Loss severity (as a percent)			40.00%			40.00%
Projected loss assumptions, period to reach final loss severity rate						2 years 6 months
Projected loss assumptions, Final CDR, Period for voluntary prepayments to continue						7 years
First Lien [Member] | Somewhat Stressful Environment [Member] | RMBS [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Projected loss assumptions, CDR, plateau rate, projection period						42 months
Projected loss assumptions, period to reach final loss severity rate						4 years 6 months
Increase in the plateau period used to calculate potential change in loss estimate (in months)						6 months
Projected loss assumptions, prior period to reach final loss severity rate						2 years 6 months
First Lien [Member] | Somewhat Stressful Environment [Member] | RMBS [Member] | United States [Member] | Subprime [Member]
Schedule of Expected Losses to be Paid [Line Items]
Projected loss assumptions, increase (decrease) in expected loss to be paid, net						$ 43,000,000
First Lien [Member] | Somewhat Stressful Environment [Member] | RMBS [Member] | United States [Member] | Prime [Member]
Schedule of Expected Losses to be Paid [Line Items]
Projected loss assumptions, increase (decrease) in expected loss to be paid, net						$ 100,000
First Lien [Member] | Somewhat Stressful Environment [Member] | RMBS [Member] | United States [Member] | Option Adjustable Rate Mortgage and Alt-A Mortgage [Member]
Schedule of Expected Losses to be Paid [Line Items]
Loss severity (as a percent)			45.00%			45.00%
First Lien [Member] | Somewhat Stressful Environment [Member] | RMBS [Member] | United States [Member] | Option ARM [Member]
Schedule of Expected Losses to be Paid [Line Items]
Projected loss assumptions, increase (decrease) in expected loss to be paid, net						$ 7,000,000
First Lien [Member] | Somewhat Stressful Environment [Member] | RMBS [Member] | United States [Member] | Alt-A [Member]
Schedule of Expected Losses to be Paid [Line Items]
Projected loss assumptions, increase (decrease) in expected loss to be paid, net						$ 13,000,000
First Lien [Member] | Somewhat Stressful Environment [Member] | Subprime [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Loss severity (as a percent)			60.00%			60.00%
First Lien [Member] | More Stressful Environment [Member] | RMBS [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Period from plateau to intermediate conditional default rate (in months)						15 months
Projected loss assumptions, period to reach final loss severity rate						9 years
First Lien [Member] | More Stressful Environment [Member] | RMBS [Member] | United States [Member] | Subprime [Member]
Schedule of Expected Losses to be Paid [Line Items]
Projected loss assumptions, increase (decrease) in expected loss to be paid, net						$ 59,000,000
First Lien [Member] | More Stressful Environment [Member] | RMBS [Member] | United States [Member] | Prime [Member]
Schedule of Expected Losses to be Paid [Line Items]
Projected loss assumptions, increase (decrease) in expected loss to be paid, net						400,000
First Lien [Member] | More Stressful Environment [Member] | RMBS [Member] | United States [Member] | Option ARM [Member]
Schedule of Expected Losses to be Paid [Line Items]
Projected loss assumptions, increase (decrease) in expected loss to be paid, net						14,000,000
First Lien [Member] | More Stressful Environment [Member] | RMBS [Member] | United States [Member] | Alt-A [Member]
Schedule of Expected Losses to be Paid [Line Items]
Projected loss assumptions, increase (decrease) in expected loss to be paid, net						33,000,000
First Lien [Member] | Somewhat Less Stressful Environment [Member] | RMBS [Member] | United States [Member] | Subprime [Member]
Schedule of Expected Losses to be Paid [Line Items]
Projected loss assumptions, increase (decrease) in expected loss to be paid, net						(10,000,000)
First Lien [Member] | Somewhat Less Stressful Environment [Member] | RMBS [Member] | United States [Member] | Prime [Member]
Schedule of Expected Losses to be Paid [Line Items]
Projected loss assumptions, increase (decrease) in expected loss to be paid, net						(17,000)
First Lien [Member] | Somewhat Less Stressful Environment [Member] | RMBS [Member] | United States [Member] | Option ARM [Member]
Schedule of Expected Losses to be Paid [Line Items]
Projected loss assumptions, increase (decrease) in expected loss to be paid, net						(21,000,000)
First Lien [Member] | Somewhat Less Stressful Environment [Member] | RMBS [Member] | United States [Member] | Alt-A [Member]
Schedule of Expected Losses to be Paid [Line Items]
Projected loss assumptions, increase (decrease) in expected loss to be paid, net						$ (6,000,000)
First Lien [Member] | Least Stressful Environment [Member] | RMBS [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Projected loss assumptions, CDR, plateau rate, projection period						30 months
Period from plateau to intermediate conditional default rate (in months)						9 months
Decrease in the plateau period used to calculate potential change in loss estimate (in months)						6 months
First Lien [Member] | Least Stressful Environment [Member] | RMBS [Member] | United States [Member] | Subprime [Member]
Schedule of Expected Losses to be Paid [Line Items]
Projected loss assumptions, increase (decrease) in expected loss to be paid, net						$ (35,000,000)
First Lien [Member] | Least Stressful Environment [Member] | RMBS [Member] | United States [Member] | Prime [Member]
Schedule of Expected Losses to be Paid [Line Items]
Projected loss assumptions, increase (decrease) in expected loss to be paid, net						(100,000)
First Lien [Member] | Least Stressful Environment [Member] | RMBS [Member] | United States [Member] | Option ARM [Member]
Schedule of Expected Losses to be Paid [Line Items]
Projected loss assumptions, increase (decrease) in expected loss to be paid, net						(32,000,000)
First Lien [Member] | Least Stressful Environment [Member] | RMBS [Member] | United States [Member] | Alt-A [Member]
Schedule of Expected Losses to be Paid [Line Items]
Projected loss assumptions, increase (decrease) in expected loss to be paid, net						$ (18,000,000)
First Lien [Member] | Bank of America [Member] | RMBS [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Agreed reimbursement of R&W, percentage			80.00%			80.00%
Maximum loss up to which loss sharing percentage applicable			$ 6,600,000,000			$ 6,600,000,000
Collateral losses			4,500,000,000			4,500,000,000
First Lien [Member] | Bank of America [Member] | Base Scenario [Member] | RMBS [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Collateral losses			5,200,000,000			5,200,000,000
Assets held under trust for reimbursement payment			$ 577,000,000			$ 577,000,000
First Lien [Member] | UBS [Member] | RMBS [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Agreed reimbursement of R&W, percentage			85.00%			85.00%
Guarantor obligations, number of future losses transactions reimbursed | Transaction						3
Assets held under trust for reimbursement payment			$ 44,000,000			$ 44,000,000
First Lien [Member] | BIG [Member] | RMBS [Member] | United States [Member] | Subprime [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net par amount outstanding			1,220,000,000			1,220,000,000			1,304,000,000
First Lien [Member] | BIG [Member] | RMBS [Member] | United States [Member] | Prime [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net par amount outstanding			124,000,000			124,000,000			284,000,000
First Lien [Member] | BIG [Member] | RMBS [Member] | United States [Member] | Option ARM [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net par amount outstanding			96,000,000			96,000,000			141,000,000
First Lien [Member] | BIG [Member] | RMBS [Member] | United States [Member] | Alt-A [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net par amount outstanding			$ 621,000,000			$ 621,000,000			$ 793,000,000
Second Lien [Member] | RMBS [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Period from plateau to intermediate conditional default rate (in months)						28 months
Number of scenarios weighted in estimating expected losses | scenario						5			5
Period of loan default estimate						6 months
Number of preceding months average liquidation rates used to estimate loan default rate						6 months
Monthly delinquency threshold						5 months
Projected loss assumptions, period of consistent conditional default rate						6 months
Stress period (in months)						34 months
Period of constant conditional default rate (in months)						1 month
Loss recovery assumption (as a percent)			2.00%			2.00%			2.00%		2.00%
Number of conditional default rate curves modeled in estimating losses | Curve						5
Estimated benefit from loan repurchases related to breaches of R&W included in net expected loss estimates	[4]		$ 32,000,000			$ 32,000,000			$ 79,000,000
Liability for unpaid claims and claims adjustment expense, net largest single loss			114,000,000	[1]	3,000,000	114,000,000	[1]	3,000,000	61,000,000	[1]	$ 65,000,000	$ 1,000,000	$ (11,000,000)
Economic loss development after recoveries for R&W			(7,000,000)		(6,000,000)	(2,000,000)		0
Net par amount outstanding			$ 1,376,000,000			$ 1,376,000,000			$ 1,560,000,000
Second Lien [Member] | RMBS [Member] | United States [Member] | Home Equity Line of Credit and Closed-end Mortgage [Member]
Schedule of Expected Losses to be Paid [Line Items]
Final CPR			15.00%			15.00%			15.00%		15.00%
Second Lien [Member] | Base Scenario [Member] | RMBS [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Period from plateau to intermediate conditional default rate (in months)						28 months
Stress period (in months)						34 months
Period of constant conditional default rate (in months)						6 months
Second Lien [Member] | Base Scenario One [Member] | RMBS [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Projected loss assumptions, CDR, plateau rate, projection period						8 months
Period from plateau to intermediate conditional default rate (in months)						31 months
Stress period (in months)						39 months
Increase in conditional default rate ramp down period						3 months
Second Lien [Member] | Base Scenario One [Member] | RMBS [Member] | United States [Member] | HELOCs [Member]
Schedule of Expected Losses to be Paid [Line Items]
Change in estimate for increased conditional default rate plateau period						$ 49,000,000
Second Lien [Member] | Based Scenario Two [Member] | RMBS [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Stress period (in months)						29 months
Period of constant conditional default rate (in months)						4 months
Change in estimate for decreased prepayment rate, Percent						10.00%
Decreased conditional default rate ramp down period						25 months
Second Lien [Member] | Based Scenario Two [Member] | RMBS [Member] | United States [Member] | HELOCs [Member]
Schedule of Expected Losses to be Paid [Line Items]
Change in estimate for decreased conditional default rate ramp down period						$ 30,000,000
Second Lien [Member] | Guarantor Obligations, Group One [Member] | Deutsche Bank [Member] | RMBS [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Maximum aggregate collateral losses up to which first layer of loss sharing will be applicable																$ 319,000,000
Loss sharing percentage, first layer																80.00%
Second Lien [Member] | BIG [Member] | RMBS [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net par amount outstanding			$ 1,366,000,000			1,366,000,000			$ 1,451,000,000
Southern District of Mississippi Vs Madison County, Mississippi [Member] | Parkway East [Member] | Public Finance [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net par amount outstanding			20,000,000			$ 20,000,000
Payment time period on annual debt service						2 years
Healthcare [Member] | Public Finance [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net par amount outstanding			13,600,000,000			$ 13,600,000,000
Healthcare [Member] | BIG [Member] | Public Finance [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Net par amount outstanding			303,000,000			303,000,000
Financial Guarantee Accounted for as Credit Derivatives [Member] | RMBS [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liability for unpaid claims and claims adjustment expense, net largest single loss	[10]		29,000,000			29,000,000			38,000,000
Economic loss development after recoveries for R&W	[11]		(9,000,000)		(6,000,000)	(13,000,000)		(13,000,000)
Financial Guarantee Accounted for as Credit Derivatives [Member] | Other structured finance [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liability for unpaid claims and claims adjustment expense, net largest single loss	[10]		(36,000,000)			(36,000,000)			(33,000,000)
Economic loss development after recoveries for R&W	[11]		(1,000,000)		(3,000,000)	(4,000,000)		(14,000,000)
Financial Guarantee Accounted for as Credit Derivatives [Member] | Triple-X Life Insurance Transaction [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liability for unpaid claims and claims adjustment expense, net largest single loss	[10]		11,000,000			11,000,000			11,000,000
Economic loss development after recoveries for R&W	[11]		(1,000,000)		1,000,000	0		2,000,000
Financial Guarantee Accounted for as Credit Derivatives [Member] | Student Loan [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liability for unpaid claims and claims adjustment expense, net largest single loss	[10]		0			0			0
Economic loss development after recoveries for R&W	[11]		0		0	0		0
Financial Guarantee Accounted for as Credit Derivatives [Member] | Public Finance [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liability for unpaid claims and claims adjustment expense, net largest single loss	[10]		0			0			0
Economic loss development after recoveries for R&W	[11]		0		(6,000,000)	0		(6,000,000)
Financial Guarantee Accounted for as Credit Derivatives [Member] | Public Finance [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liability for unpaid claims and claims adjustment expense, net largest single loss	[10]		0			0			0
Economic loss development after recoveries for R&W	[11]		0		(6,000,000)	0		(6,000,000)
Financial Guarantee Accounted for as Credit Derivatives [Member] | First Lien [Member] | RMBS [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liability for unpaid claims and claims adjustment expense, net largest single loss	[10]		26,000,000			26,000,000			34,000,000
Economic loss development after recoveries for R&W	[11]		(9,000,000)		(7,000,000)	(13,000,000)		(13,000,000)
Financial Guarantee Accounted for as Credit Derivatives [Member] | First Lien [Member] | RMBS [Member] | United States [Member] | Subprime [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liability for unpaid claims and claims adjustment expense, net largest single loss	[10]		32,000,000			32,000,000			39,000,000
Economic loss development after recoveries for R&W	[11]		(7,000,000)		(5,000,000)	(9,000,000)		(6,000,000)
Financial Guarantee Accounted for as Credit Derivatives [Member] | First Lien [Member] | RMBS [Member] | United States [Member] | Prime [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liability for unpaid claims and claims adjustment expense, net largest single loss	[10]		0			0			(4,000,000)
Economic loss development after recoveries for R&W	[11]		0		0	0		(1,000,000)
Financial Guarantee Accounted for as Credit Derivatives [Member] | First Lien [Member] | RMBS [Member] | United States [Member] | Option ARM [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liability for unpaid claims and claims adjustment expense, net largest single loss	[10]		(5,000,000)			(5,000,000)			(1,000,000)
Economic loss development after recoveries for R&W	[11]		(1,000,000)		1,000,000	(3,000,000)		4,000,000
Financial Guarantee Accounted for as Credit Derivatives [Member] | First Lien [Member] | RMBS [Member] | United States [Member] | Alt-A [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liability for unpaid claims and claims adjustment expense, net largest single loss	[10]		(1,000,000)			(1,000,000)			0
Economic loss development after recoveries for R&W	[11]		(1,000,000)		(3,000,000)	(1,000,000)		(10,000,000)
Financial Guarantee Accounted for as Credit Derivatives [Member] | Second Lien [Member] | RMBS [Member] | United States [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liability for unpaid claims and claims adjustment expense, net largest single loss	[10]		3,000,000			3,000,000			$ 4,000,000
Economic loss development after recoveries for R&W	[11]		$ 0		$ 1,000,000	$ 0		$ 0
ACA 2005-2 Collateralized Debt Obligations [Member] | CIFG Holding Inc. [Member] | Credit Default Swap [Member] | Financial Guarantee Accounted for as Credit Derivatives [Member] | CIFG Holdings Inc. vs JP Morgan Securities LLC [Member] | RMBS [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liability for unpaid claims and claims adjustment expense, net largest single loss															$ 400,000,000
Libertas II Collateralized Debt Obligations [Member] | CIFG Holding Inc. [Member] | Credit Default Swap [Member] | Financial Guarantee Accounted for as Credit Derivatives [Member] | CIFG Holdings Inc. vs JP Morgan Securities LLC [Member] | RMBS [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liability for unpaid claims and claims adjustment expense, net largest single loss															$ 325,000,000
Class A-1 Note [Member] | Domestic Corporate Debt Securities [Member] | CIFG Holding Inc. [Member] | CIFG Holding Inc. vs Goldman, Sachs & Co [Member] | RMBS [Member]
Schedule of Expected Losses to be Paid [Line Items]
Liability for unpaid claims and claims adjustment expense, net largest single loss														$ 325,000,000
Class A-2 Note [Member] | Domestic Corporate Debt Securities [Member] | CIFG Holding Inc. [Member] | CIFG Holding Inc. vs Goldman, Sachs & Co [Member] | RMBS [Member]
Schedule of Expected Losses to be Paid [Line Items]
Purchased debt securities														$ 10,000,000
Positive Outcome of Litigation [Member] | CIFG Holding Inc. [Member] | CIFG Holding Inc. vs Goldman, Sachs & Co [Member] | RMBS [Member]
Schedule of Expected Losses to be Paid [Line Items]
Awarded damages		$ 2,500,000
[1]	Includes expected LAE to be paid of $8 million as of June 30, 2016 and $12 million as of December 31, 2015.
[2]	Excludes $1.4 billion of loss mitigation securities insured and held by the Company as of June 30, 2016, which are primarily BIG.
[3]	Excludes $1.5 billion of loss mitigation securities insured and held by the Company as of December 31, 2015, which are primarily BIG.
[4]	The Company’s agreements with R&W providers generally provide that, as the Company makes claim payments, the R&W providers reimburse it for those claims; if the Company later receives reimbursement through the transaction (for example, from excess spread), the Company repays the R&W providers. See the section “Breaches of Representations and Warranties” for information about the R&W agreements and eligible assets held in trust with respect to such agreements. When the Company projects receiving more reimbursements in the future than it projects paying in claims on transactions covered by R&W settlement agreements, the Company will have a net R&W payable.
[5]	For transactions where the initial CPR is higher than the final CPR, the initial CPR is held constant and the final CPR is not used.
[6]	Represents variables for most heavily weighted scenario (the “base case”).
[7]	For transactions where the initial CPR is higher than the final CPR, the initial CPR is held constant and the final CPR is not used.
[8]	Represents variables for most heavily weighted scenario (the “base case”).
[9]	Subsequent to June 30, 2016, and as a result of its July 1, 2016 Puerto Rico claim payments, the Company downgraded from BIG 1 to BIG 3 $1,803 million net par outstanding of financial guaranty insurance across two risks..
[10]	Refer to Note 8, Financial Guaranty Contracts Accounted for as Credit Derivatives.
[11]	Refer to Note 8, Financial Guaranty Contracts Accounted for as Credit Derivatives.

Financial Guaranty Insurance -

Financial Guaranty Insurance - Narrative (Details) - USD ($) $ in Millions	6 Months Ended			12 Months Ended
	Jun. 30, 2016		Jun. 30, 2015	Dec. 31, 2015
Guarantor Obligations [Line Items]
Net par amount outstanding	$ 329,864	[1]		$ 358,571	[2]
Guaranteed investment contract, aggregate accreted balance	1,700
Assets of GIC issuers, aggregate market value	$ 800
Variable Rate Demand Obligation [Member]
Guarantor Obligations [Line Items]
Rate basis for bank bond rate	prime rate
Bonds held by bank, minimum installment payment period	5 years
Minimum [Member]
Guarantor Obligations [Line Items]
Weighted average risk-free rates for U.S. dollar denominated financial guaranty insurance obligations	0.00%			0.00%
Minimum [Member] | Variable Rate Demand Obligation [Member]
Guarantor Obligations [Line Items]
Bank bond rate (as a percent)	2.00%
Threshold period of bonds held by bank for right of accelerated repayment (in days)	90 days
Maximum [Member]
Guarantor Obligations [Line Items]
Weighted average risk-free rates for U.S. dollar denominated financial guaranty insurance obligations	2.46%			3.25%
Maximum [Member] | Variable Rate Demand Obligation [Member]
Guarantor Obligations [Line Items]
Bank bond rate (as a percent)	3.00%
Bank bond capped rate (as a percent)	25.00%
Threshold period of bonds held by bank for right of accelerated repayment (in days)	180 days
Cash [Member] | Minimum [Member]
Guarantor Obligations [Line Items]
Collateralization as a percentage of GIC balance	100.00%
Asset-backed Securities [Member] | Maximum [Member]
Guarantor Obligations [Line Items]
Collateralization as a percentage of GIC balance	108.00%
Termination of Swap Obligation due to Rating Downgrade [Member] | Maximum [Member] | AGM [Member]
Guarantor Obligations [Line Items]
Increase in losses as a result of an adverse outcome, minimum	$ 193
Termination of Swap Obligation due to Further Rating Downgrade [Member] | Maximum [Member] | AGM [Member]
Guarantor Obligations [Line Items]
Increase in losses as a result of an adverse outcome, minimum	455
Variable Rate Demand Obligation [Member] | AGM and AGC [Member]
Guarantor Obligations [Line Items]
Net par amount outstanding	5,400
Internal Credit, BBB Minus Rating [Member] | Variable Rate Demand Obligation [Member] | AGM and AGC [Member]
Guarantor Obligations [Line Items]
Net par amount outstanding	$ 300
Foreign Currency Concentration Risk [Member] | Premiums Receivable [Member]
Guarantor Obligations [Line Items]
Percentage of installment premiums denominated in currencies other than the U.S. dollar	55.00%		50.00%	52.00%
[1]	Excludes $1.4 billion of loss mitigation securities insured and held by the Company as of June 30, 2016, which are primarily BIG.
[2]	Excludes $1.5 billion of loss mitigation securities insured and held by the Company as of December 31, 2015, which are primarily BIG.

Financial Guaranty Insurance 61

Financial Guaranty Insurance - Net Earned Premiums (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Financial Guarantee Insurance Premiums [Line Items]
Scheduled net earned premiums		$ 93	$ 118	$ 184	$ 214
Acceleration of net earned premiums	[1]	117	96	206	137
Accretion of discount on net premiums receivable		4	5	7	9
Financial guaranty insurance net earned premiums		214	219	397	360
Other		0	0	0	1
Net	[2]	214	219	397	361
Variable Interest Entity, Primary Beneficiary [Member]
Financial Guarantee Insurance Premiums [Line Items]
Net		$ 5	$ 3	$ 8	$ 10
[1]	Reflects the unscheduled refunding or termination of the insurance on an insured obligation as well as changes in scheduled earnings due to changes in the expected lives of the insured obligations.
[2]	Excludes $3 million and $5 million for Second Quarter 2016 and 2015, respectively, and $8 million and $10 million for Six Months 2016 and 2015, respectively, related to consolidated FG VIEs.

Financial Guaranty Insurance 62

Financial Guaranty Insurance - Components of Unearned Premium Reserve (Details) - USD ($) $ in Millions		Jun. 30, 2016	Dec. 31, 2015
Insurance [Abstract]
Deferred premium revenue, gross		$ 3,641	$ 4,008
Deferred premium revenue, ceded		230	238
Deferred premium revenue, net	[1]	3,411	3,770
Contra-paid, gross	[2]	(24)	(12)
Contra-paid, ceded	[2]	(2)	(6)
Contra-paid, net	[1],[2]	(22)	(6)
Unearned premium reserve, gross		3,617	3,996
Unearned premium reserve, ceded		228	232
Unearned premium reserve, net	[1]	3,389	3,764
Total net unearned premium reserve related to FG VIE		98	110
Contra-paid related to FG VIE		$ 30	$ 30
[1]	Excludes $98 million and $110 million of deferred premium revenue, and $30 million and $30 million of contra-paid related to FG VIEs as of June 30, 2016 and December 31, 2015, respectively.
[2]	See "Financial Guaranty Insurance Losses– Insurance Contracts' Loss Information" below for an explanation of "contra-paid".

Financial Guaranty Insurance 63

Financial Guaranty Insurance - Gross Premium Receivable Net of Commissions on Assumed Business Roll Forward (Details) - USD ($) $ in Millions	6 Months Ended				12 Months Ended
	Jun. 30, 2016		Jun. 30, 2015		Dec. 31, 2015
Gross Premium Receivable Net of Ceding Commissions [Roll Forward]
Beginning of period	$ 693		$ 729		$ 729
Premiums receivable acquired in Radian Asset Acquisition on April 1, 2015	0		2
Gross written premiums, net of commissions on assumed business	83		61
Gross premiums received, net of commissions on assumed business	(107)		(79)
Adjustments:
Changes in the expected term	(27)		(9)
Accretion of discount, net of commissions on assumed business	3		10
Foreign exchange translation	(22)		(8)
Consolidation/deconsolidation of FG VIEs	0		(4)
End of period	623	[1]	702	[1]	693
Premiums receivable, net of commissions payable	623				$ 693
Variable Interest Entity, Primary Beneficiary [Member]
Adjustments:
End of period	$ 11		23
Non-financial Guaranty Line of business [Member]
Adjustments:
Premiums receivable, net of commissions payable			$ 1
Premiums Receivable [Member] | Foreign Currency Concentration Risk [Member]
Adjustments:
Percentage of installment premiums denominated in currencies other than the U.S. dollar	55.00%		50.00%		52.00%
[1]	Excludes $11 million and $23 million as of June 30, 2016 and June 30, 2015, respectively, related to consolidated FG VIEs. Excludes $1 million related to non-financial guaranty line of business as of June 30, 2015

Financial Guaranty Insurance 64

Financial Guaranty Insurance - Expected Collections of Gross Premiums Receivable Net of Commissions on Assumed Business (Details) $ in Millions	Jun. 30, 2016USD ($)
Consolidated Entity Excluding Variable Interest Entities (VIE) [Member]
Financial Guarantee Insurance Premiums [Line Items]
2016 (July 1 – September 30)	$ 21
2016 (October 1 – December 31)	21
2,017	66
2,018	59
2,019	54
2,020	53
2021-2025	212
2026-2030	139
2031-2035	97
After 2,035	79
Total	801	[1]
Variable Interest Entity, Primary Beneficiary [Member]
Financial Guarantee Insurance Premiums [Line Items]
Cash collections on FG VIEs	$ 14
[1]	Excludes expected cash collections on FG VIEs of $14 million

Financial Guaranty Insurance 65

Financial Guaranty Insurance - Scheduled Net Earned Premiums Insurance Contracts (Details) - USD ($) $ in Millions		Jun. 30, 2016	Dec. 31, 2015
Financial Guarantee Insurance Premiums [Line Items]
Deferred premium revenue, net	[1]	$ 3,411	$ 3,770
Financial Guarantee Insurance Product Line [Member]
Financial Guarantee Insurance Premiums [Line Items]
2016 (July 1 – September 30)		89
2016 (October 1 – December 31)		85
2,017		313
2,018		287
2,019		258
2,020		236
2021-2025		922
2026-2030		588
2031-2035		350
After 2,035		283
Deferred premium revenue, net	[2]	3,411
Future accretion		166
Total future net earned premiums		3,577
Variable Interest Entity, Primary Beneficiary [Member]
Financial Guarantee Insurance Premiums [Line Items]
Deferred premium revenue, net		$ 98
[1]	Excludes $98 million and $110 million of deferred premium revenue, and $30 million and $30 million of contra-paid related to FG VIEs as of June 30, 2016 and December 31, 2015, respectively.
[2]	Excludes scheduled net earned premiums on consolidated FG VIEs of $98 million.

Financial Guaranty Insurance 66

Financial Guaranty Insurance - Selected Information for Policies Paid In Installments (Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Jun. 30, 2016		Dec. 31, 2015	Jun. 30, 2015	[1]	Dec. 31, 2014
Financial Guarantee Insurance Premiums [Line Items]
Premiums receivable, net of commission payable	$ 623	[1]	$ 693	$ 702		$ 729
Financial Guarantee Policies Paid in Installments [Member]
Financial Guarantee Insurance Premiums [Line Items]
Premiums receivable, net of commission payable	623		693
Gross deferred premium revenue	$ 1,086		$ 1,240
Weighted-average risk-free rate used to discount premiums	3.10%		3.10%
Weighted-average period of premiums receivable (in years)	9 years 2 months 4 days		9 years 4 months 24 days
[1]	Excludes $11 million and $23 million as of June 30, 2016 and June 30, 2015, respectively, related to consolidated FG VIEs. Excludes $1 million related to non-financial guaranty line of business as of June 30, 2015

Financial Guaranty Insurance 67

Financial Guaranty Insurance - Loss and LAE Reserve and Salvage and Subrogation Recoverable Net of Reinsurance (Details) - USD ($) $ in Millions		Jun. 30, 2016	Dec. 31, 2015
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE Reserve, net	[1]	$ 1,186	$ 998
Salvage and Subrogation Recoverable, net	[1]	319	126
Net Reserve (Recoverable)	[1]	867	872
Financial Guarantee Insurance And Other Product Line [Member]
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE Reserve, net		1,185
Financial Guarantee Insurance And Other Product Line [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member]
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE Reserve, net		1,257	1,072
Salvage and Subrogation Recoverable, net		319	126
Net Reserve (Recoverable)		938	946
Financial Guarantee Insurance And Other Product Line [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE Reserve, net		(71)	(74)
Salvage and Subrogation Recoverable, net		0	0
Net Reserve (Recoverable)		(71)	(74)
Triple-X Life Insurance Transaction [Member] | Financial Guarantee Insurance And Other Product Line [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member]
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE Reserve, net		83	82
Salvage and Subrogation Recoverable, net		0	0
Net Reserve (Recoverable)		83	82
Student Loan [Member] | Financial Guarantee Insurance And Other Product Line [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member]
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE Reserve, net		30	51
Salvage and Subrogation Recoverable, net		0	0
Net Reserve (Recoverable)		30	51
Other structured finance [Member] | Financial Guarantee Insurance And Other Product Line [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member]
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE Reserve, net		30	48
Salvage and Subrogation Recoverable, net		1	0
Net Reserve (Recoverable)		29	48
Structured Finance [Member] | Financial Guarantee Insurance And Other Product Line [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member]
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE Reserve, net		426	443
Salvage and Subrogation Recoverable, net		302	116
Net Reserve (Recoverable)		124	327
Financial Guarantee [Member] | Financial Guarantee Insurance And Other Product Line [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member]
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE Reserve, net		1,257	1,072
Salvage and Subrogation Recoverable, net		316	123
Net Reserve (Recoverable)		941	949
Public Finance [Member] | Financial Guarantee Insurance And Other Product Line [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member]
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE Reserve, net		831	629
Salvage and Subrogation Recoverable, net		14	7
Net Reserve (Recoverable)		817	622
Other [Member] | Financial Guarantee Insurance And Other Product Line [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member]
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE Reserve, net		0	0
Salvage and Subrogation Recoverable, net		3	3
Net Reserve (Recoverable)		(3)	(3)
United States [Member] | RMBS [Member] | Financial Guarantee Insurance And Other Product Line [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member]
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE Reserve, net		283	262
Salvage and Subrogation Recoverable, net		301	116
Net Reserve (Recoverable)		(18)	146
United States [Member] | Public Finance [Member] | Financial Guarantee Insurance And Other Product Line [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member]
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE Reserve, net		807	604
Salvage and Subrogation Recoverable, net		14	7
Net Reserve (Recoverable)		793	597
Non United States [Member] | Public Finance [Member] | Financial Guarantee Insurance And Other Product Line [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member]
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE Reserve, net		24	25
Salvage and Subrogation Recoverable, net		0	0
Net Reserve (Recoverable)		24	25
First Lien [Member] | United States [Member] | RMBS [Member] | Financial Guarantee Insurance And Other Product Line [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member]
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE Reserve, net		199	230
Salvage and Subrogation Recoverable, net		256	63
Net Reserve (Recoverable)		(57)	167
Second Lien [Member] | United States [Member] | RMBS [Member] | Financial Guarantee Insurance And Other Product Line [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member]
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE Reserve, net		84	32
Salvage and Subrogation Recoverable, net		45	53
Net Reserve (Recoverable)		39	(21)
Prime [Member] | First Lien [Member] | United States [Member] | RMBS [Member] | Financial Guarantee Insurance And Other Product Line [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member]
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE Reserve, net		3	2
Salvage and Subrogation Recoverable, net		0	0
Net Reserve (Recoverable)		3	2
Alt-A [Member] | First Lien [Member] | United States [Member] | RMBS [Member] | Financial Guarantee Insurance And Other Product Line [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member]
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE Reserve, net		40	46
Salvage and Subrogation Recoverable, net		184	0
Net Reserve (Recoverable)		(144)	46
Option ARM [Member] | First Lien [Member] | United States [Member] | RMBS [Member] | Financial Guarantee Insurance And Other Product Line [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member]
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE Reserve, net		9	13
Salvage and Subrogation Recoverable, net		58	42
Net Reserve (Recoverable)		(49)	(29)
Subprime [Member] | First Lien [Member] | United States [Member] | RMBS [Member] | Financial Guarantee Insurance And Other Product Line [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member]
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE Reserve, net		147	169
Salvage and Subrogation Recoverable, net		14	21
Net Reserve (Recoverable)		$ 133	$ 148
[1]	See “Components of Net Reserves (Salvage)” table for loss and LAE reserve and salvage and subrogation recoverable components.

Financial Guaranty Insurance 68

Financial Guaranty Insurance - Components of Net Reserves (Salvage) Insurance Contracts (Details) - USD ($) $ in Millions		Jun. 30, 2016	Dec. 31, 2015
Insurance [Abstract]
Loss and LAE reserve		$ 1,268	$ 1,067
Reinsurance recoverable on unpaid losses		(82)	(69)
Loss and LAE reserve, net	[1]	1,186	998
Salvage and subrogation recoverable		(323)	(126)
Salvage and subrogation payable	[2]	7	3
Other recoverables		(3)	(3)
Salvage and subrogation recoverable, net and other recoverable		(319)	(126)
Net reserves (salvage)		$ 867	$ 872
[1]	See “Components of Net Reserves (Salvage)” table for loss and LAE reserve and salvage and subrogation recoverable components.
[2]	Recorded as a component of reinsurance balances payable.

Financial Guaranty Insurance 69

Financial Guaranty Insurance - Reconciliation of Net Expected Loss to be Paid and Expensed (Details) - USD ($) $ in Millions		Jun. 30, 2016		Mar. 31, 2016	Dec. 31, 2015		Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014
Guarantor Obligations [Line Items]
Net expected loss to be paid after recoveries for R&W		$ (1,326)	[1]	$ (1,337)	$ (1,391)	[1]	$ (1,510)	$ (1,154)	$ (1,169)
Contra-paid, net	[2],[3]	22			6
Loss and LAE reserve - financial guaranty insurance contracts, net of reinsurance	[4]	(1,186)			(998)
Other recoveries		3			3
Net expected loss to be expensed		364
Variable Interest Entity, Primary Beneficiary [Member]
Guarantor Obligations [Line Items]
Net expected loss to be expensed		72
Financial Guarantee Insurance And Other Product Line [Member]
Guarantor Obligations [Line Items]
Net expected loss to be paid after recoveries for R&W	[5]	1,208
Contra-paid, net		22
Salvage and subrogation recoverable, net of reinsurance		316
Loss and LAE reserve - financial guaranty insurance contracts, net of reinsurance		(1,185)
Other recoveries		3
Net expected loss to be expensed	[6]	364
Financial Guarantee Insurance And Other Product Line [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Guarantor Obligations [Line Items]
Loss and LAE reserve - financial guaranty insurance contracts, net of reinsurance		71			74
Financial Guarantee Insurance And Other Product Line [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member]
Guarantor Obligations [Line Items]
Loss and LAE reserve - financial guaranty insurance contracts, net of reinsurance		$ (1,257)			$ (1,072)
[1]	Includes expected LAE to be paid of $8 million as of June 30, 2016 and $12 million as of December 31, 2015.
[2]	Excludes $98 million and $110 million of deferred premium revenue, and $30 million and $30 million of contra-paid related to FG VIEs as of June 30, 2016 and December 31, 2015, respectively.
[3]	See "Financial Guaranty Insurance Losses– Insurance Contracts' Loss Information" below for an explanation of "contra-paid".
[4]	See “Components of Net Reserves (Salvage)” table for loss and LAE reserve and salvage and subrogation recoverable components.
[5]	See "Net Expected Loss to be Paid (Recovered) by Accounting Model" table in Note 5, Expected Loss to be Paid.
[6]	Excludes $72 million as of June 30, 2016, related to consolidated FG VIEs.

Financial Guaranty Insurance 70

Financial Guaranty Insurance - Net Expected Loss to be Expensed Insurance Contracts (Details) $ in Millions	Jun. 30, 2016USD ($)
Insurance [Abstract]
2016 (July 1 – September 30)	$ 9
2016 (October 1 – December 31)	8
Subtotal 2,016	17
2,017	30
2,018	28
2,019	29
2,020	27
2021-2025	103
2026-2030	71
2031-2035	40
After 2,035	19
Net expected loss to be expensed	364
Future accretion	199
Total expected future loss and LAE	$ 563

Financial Guaranty Insurance 71

Financial Guaranty Insurance - Loss and LAE Reported on the Statements of Operations (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE	$ 102	$ 188	$ 192	$ 206
Consolidated Entity Excluding Variable Interest Entities (VIE) [Member]
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE	99	190	196	213
Variable Interest Entity, Primary Beneficiary [Member]
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE	3	(2)	(4)	(7)
RMBS [Member] | Financial Guarantee Insurance And Other Product Line [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] | United States [Member]
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE	(12)	(9)	(1)	(2)
Triple-X Life Insurance Transaction [Member] | Financial Guarantee Insurance And Other Product Line [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member]
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE	(1)	1	2	7
Student Loan [Member] | Financial Guarantee Insurance And Other Product Line [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member]
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE	0	1	(14)	(5)
Other structured finance [Member] | Financial Guarantee Insurance And Other Product Line [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member]
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE	(3)	0	(3)	(2)
Structured Finance [Member] | Financial Guarantee Insurance And Other Product Line [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member]
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE	(16)	(7)	(16)	(2)
Public Finance [Member] | Financial Guarantee Insurance And Other Product Line [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member]
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE	115	197	212	215
Public Finance [Member] | Financial Guarantee Insurance And Other Product Line [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] | United States [Member]
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE	116	196	213	209
Public Finance [Member] | Financial Guarantee Insurance And Other Product Line [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] | Non United States [Member]
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE	(1)	1	(1)	6
First Lien [Member] | RMBS [Member] | Financial Guarantee Insurance And Other Product Line [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] | United States [Member]
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE	(16)	(9)	(18)	(12)
Second Lien [Member] | RMBS [Member] | Financial Guarantee Insurance And Other Product Line [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] | United States [Member]
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE	4	0	17	10
Prime [Member] | First Lien [Member] | RMBS [Member] | Financial Guarantee Insurance And Other Product Line [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] | United States [Member]
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE	(1)	(1)	(1)	(1)
Alt-A [Member] | First Lien [Member] | RMBS [Member] | Financial Guarantee Insurance And Other Product Line [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] | United States [Member]
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE	3	(9)	11	(11)
Option ARM [Member] | First Lien [Member] | RMBS [Member] | Financial Guarantee Insurance And Other Product Line [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] | United States [Member]
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE	(7)	0	(21)	(1)
Subprime [Member] | First Lien [Member] | RMBS [Member] | Financial Guarantee Insurance And Other Product Line [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] | United States [Member]
Liability for Claims and Claims Adjustment Expense Including Salvage and Subrogation Recoverable [Line Items]
Loss and LAE	$ (11)	$ 1	$ (7)	$ 1

Financial Guaranty Insurance 72

Financial Guaranty Insurance - BIG Transaction Loss Summary (Details) $ in Millions		6 Months Ended		12 Months Ended
		Jun. 30, 2016USD ($)risk		Dec. 31, 2015USD ($)risk
Discount
Total		$ (199)
Reserves (salvage)
Total		$ 867		$ 872
BIG [Member]
Number of risks
Total (in contracts) | risk	[1],[2],[3]	405		419
Remaining weighted average contract period
Total (in years)		10 years 1 month 2 days		10 years 8 months 4 days
Principal
Total	[3]	$ 13,704		$ 13,574
Interest
Total		7,068		7,419
Total net outstanding exposure
Total	[4]	20,772		20,993
Expected cash outflows (inflows)
Total		2,529		2,510
Potential recoveries
Total, Undiscounted R&W		85		(54)
Total, Other	[5]	(1,207)		(931)
Total		(1,122)		(985)
Subtotal
Total		1,407		1,525
Discount
Total		(199)		(286)
Present value of expected cash flows
Net expected loss to be paid		1,208		1,239
Deferred premium revenue
Total		614		734
Reserves (salvage)
Total		$ 866		$ 857
BIG [Member] | BIG 1 [Member]
Number of risks
Total (in contracts) | risk	[1],[3]	198	[6]	202
Principal
Total	[3]	$ 6,546	[6]	$ 7,019
BIG [Member] | BIG 2 [Member]
Number of risks
Total (in contracts) | risk	[1],[3]	76		85
Principal
Total	[3]	$ 4,119		$ 3,655
BIG [Member] | BIG 3 [Member]
Number of risks
Total (in contracts) | risk	[1],[3]	131	[6]	132
Principal
Total	[3]	$ 3,039	[6]	$ 2,900
BIG [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member]
Number of risks
Total (in contracts) | risk	[2]	405		419
Remaining weighted average contract period
Total (in years)		10 years 1 month 2 days		10 years 8 months 4 days
Principal
Total		$ 13,704		$ 13,574
Interest
Total		7,068		7,419
Total net outstanding exposure
Total	[4]	20,772		20,993
Expected cash outflows (inflows)
Total		2,859		2,853
Potential recoveries
Total, Undiscounted R&W		85		(61)
Total, Other	[5]	(1,407)		(1,106)
Total		(1,322)		(1,167)
Subtotal
Total		1,537		1,686
Discount
Total		(216)		(327)
Present value of expected cash flows
Net expected loss to be paid		1,321		1,359
Deferred premium revenue
Total		708		834
Reserves (salvage)
Total		$ 937		$ 931
BIG [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] | BIG 1 [Member]
Number of risks
Total (in contracts) | risk	[2]	198		202
Ceded (in contracts) | risk	[2]	(42)		(46)
Remaining weighted average contract period
Gross (in years)		9 years 9 months 6 days		10 years
Ceded (in years)		7 years 4 months 8 days		8 years 8 months 4 days
Principal
Gross		$ 7,012		$ 7,751
Ceded		(466)		(732)
Interest
Gross		3,618		4,109
Ceded		(200)		(354)
Total net outstanding exposure
Gross	[4]	10,630		11,860
Ceded	[4]	(666)		(1,086)
Expected cash outflows (inflows)
Gross		331		386
Ceded		(27)		(42)
Total		(81)		105
Potential recoveries
Gross, Undiscounted R&W		122		69
Ceded, Undiscounted R&W		(3)		(2)
Gross, Other	[5]	(667)		(441)
Ceded, Other	[5]	16		14
Gross		(545)		(372)
Ceded		13		12
Subtotal
Gross		(214)		14
Ceded		(14)		(30)
Discount
Gross		133		91
Ceded		(3)		3
Present value of expected cash flows
Ceded		(17)		(27)
Deferred premium revenue
Gross		256		371
Ceded		(8)		(37)
Reserves (salvage)
Gross		(177)		2
Ceded		$ (11)		$ (19)
BIG [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] | BIG 2 [Member]
Number of risks
Total (in contracts) | risk	[2]	76		85
Ceded (in contracts) | risk	[2]	(12)		(13)
Remaining weighted average contract period
Gross (in years)		12 years 8 months 4 days		13 years 9 months 6 days
Ceded (in years)		10 years		9 years 6 months
Principal
Gross		$ 4,571		$ 3,895
Ceded		(452)		(240)
Interest
Gross		2,991		2,805
Ceded		(228)		(110)
Total net outstanding exposure
Gross	[4]	7,562		6,700
Ceded	[4]	(680)		(350)
Expected cash outflows (inflows)
Gross		1,466		1,158
Ceded		(82)		(60)
Total		934		705
Potential recoveries
Gross, Undiscounted R&W		(2)		(49)
Ceded, Undiscounted R&W		0		1
Gross, Other	[5]	(298)		(118)
Ceded, Other	[5]	11		7
Gross		(300)		(167)
Ceded		11		8
Subtotal
Gross		1,166		991
Ceded		(71)		(52)
Discount
Gross		(232)		(286)
Ceded		12		12
Present value of expected cash flows
Ceded		(59)		(40)
Deferred premium revenue
Gross		152		150
Ceded		(7)		(4)
Reserves (salvage)
Gross		811		591
Ceded		$ (53)		$ (38)
BIG [Member] | Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] | BIG 3 [Member]
Number of risks
Total (in contracts) | risk	[2]	131		132
Ceded (in contracts) | risk	[2]	(46)		(44)
Remaining weighted average contract period
Gross (in years)		6 years 7 months 2 days		7 years 8 months 4 days
Ceded (in years)		5 years 1 month 2 days		5 years 10 months 8 days
Principal
Gross		$ 3,276		$ 3,087
Ceded		(237)		(187)
Interest
Gross		937		1,011
Ceded		(50)		(42)
Total net outstanding exposure
Gross	[4]	4,213		4,098
Ceded	[4]	(287)		(229)
Expected cash outflows (inflows)
Gross		1,228		1,464
Ceded		(57)		(53)
Total		667		734
Potential recoveries
Gross, Undiscounted R&W		(33)		(85)
Ceded, Undiscounted R&W		1		5
Gross, Other	[5]	(499)		(587)
Ceded, Other	[5]	30		19
Gross		(532)		(672)
Ceded		31		24
Subtotal
Gross		696		792
Ceded		(26)		(29)
Discount
Gross		(29)		(58)
Ceded		(97)		(89)
Present value of expected cash flows
Ceded		(123)		(118)
Deferred premium revenue
Gross		347		386
Ceded		(32)		(32)
Reserves (salvage)
Gross		378		404
Ceded		(11)		(9)
BIG [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Expected cash outflows (inflows)
Total		(330)		(343)
Potential recoveries
Total, Undiscounted R&W		0		7
Total, Other	[5]	200		175
Total		200		182
Subtotal
Total		(130)		(161)
Discount
Total		17		41
Present value of expected cash flows
Net expected loss to be paid		(113)		(120)
Deferred premium revenue
Total		(94)		(100)
Reserves (salvage)
Total		$ (71)		$ (74)
[1]	A risk represents the aggregate of the financial guaranty policies that share the same revenue source for purposes of making debt service payments.
[2]	A risk represents the aggregate of the financial guaranty policies that share the same revenue source for purposes of making debt service payments. The ceded number of risks represents the number of risks for which the Company ceded a portion of its exposure
[3]	Includes net par outstanding for VIEs.
[4]	Includes BIG amounts related to FG VIEs.
[5]	Includes excess spread.
[6]	Subsequent to June 30, 2016, and as a result of its July 1, 2016 Puerto Rico claim payments, the Company downgraded from BIG 1 to BIG 3 $1,803 million net par outstanding of financial guaranty insurance across two risks.

Fair Value Measurement - Measur

Fair Value Measurement - Measured and Carried at Fair Value (Details) $ in Millions		6 Months Ended	12 Months Ended
		Jun. 30, 2016USD ($)sourceSecurity	Dec. 31, 2015USD ($)	Mar. 31, 2016
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Percentage of CDS contracts which are fair valued using minimum premium		16.00%	20.00%	18.00%
CDS contracts [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Gross spread percentage	[1]	100.00%	100.00%
Number of sources of credit spread | source		3
Based on actual collateral specific spreads [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Gross spread percentage	[1]	13.00%	13.00%
Based on market indices [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Gross spread percentage	[1]	72.00%	73.00%
Provided by the CDS counterparty [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Gross spread percentage	[1]	15.00%	14.00%
Scenario 1 [Member] | CDS contracts [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Bank profit as % of total		62.00%
Hedge cost as % of total		16.00%
Premium received per annum as % of total		22.00%
Original gross spread/cash bond price (as a percent)		1.85%
Bank profit (as a percent)		1.15%
Hedge cost (as a percent)		0.30%
The Company premium received per annum (as a percent)		0.40%
Scenario 1 [Member] | CDS contracts [Member] | AGC [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Original gross spread/cash bond price (as a percent)		3.00%
Percentage of exposure hedged		10.00%
Scenario 2 [Member] | CDS contracts [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Bank profit as % of total		10.00%
Hedge cost as % of total		88.00%
Premium received per annum as % of total		2.00%
Original gross spread/cash bond price (as a percent)		5.00%
Bank profit (as a percent)		0.50%
Hedge cost (as a percent)		4.40%
The Company premium received per annum (as a percent)		0.10%
Scenario 2 [Member] | CDS contracts [Member] | AGC [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Original gross spread/cash bond price (as a percent)		17.60%
Percentage of exposure hedged		25.00%
Recurring [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Other invested assets		$ 55	$ 53
Recurring [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Number of fixed maturity securities valued using model processes | Security		41
Fixed maturity securities		$ 1,012
Recurring [Member] | Level 3 [Member] | CDS contracts [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount factor (as a percent)		0.47%	0.44%
Recurring [Member] | Level 3 [Member] | CDS contracts [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount factor (as a percent)		1.72%	2.51%
Available-for-Sale Debt Securities and Short Term Investments [Member] | Recurring [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Percentage of fixed maturity securities valued using model processes to the Company's fixed-income securities and short-term investments at fair value		9.60%
[1]	Based on par.

Fair Value Measurement - Financ

Fair Value Measurement - Financial Instruments Carried at Fair Value (Details) - USD ($) $ in Millions		Jun. 30, 2016	Dec. 31, 2015
Assets:
Fixed-maturity securities		$ 10,545	$ 11,023
Other invested assets		170	169
Credit derivative assets		36	81
Liabilities:
Credit derivative liabilities		432	446
Investment funds, fair value		46	45
Recurring [Member]
Assets:
Other invested assets	[1]	13	12
Credit derivative assets		36	81
FG VIEs’ assets, at fair value		814	1,261
Other assets		84	106
Total assets carried at fair value		11,492	12,483
Liabilities:
Credit derivative liabilities		432	446
FG VIEs’ liabilities with recourse, at fair value		790	1,225
FG VIEs’ liabilities without recourse, at fair value		115	124
Total liabilities carried at fair value		1,337	1,795
Recurring [Member] | Level 1 [Member]
Assets:
Other invested assets	[1]	0	0
Credit derivative assets		0	0
FG VIEs’ assets, at fair value		0	0
Other assets		22	23
Total assets carried at fair value		543	328
Liabilities:
Credit derivative liabilities		0	0
FG VIEs’ liabilities with recourse, at fair value		0	0
FG VIEs’ liabilities without recourse, at fair value		0	0
Total liabilities carried at fair value		0	0
Recurring [Member] | Level 2 [Member]
Assets:
Other invested assets	[1]	6	5
Credit derivative assets		0	0
FG VIEs’ assets, at fair value		0	0
Other assets		27	21
Total assets carried at fair value		9,045	9,600
Liabilities:
Credit derivative liabilities		0	0
FG VIEs’ liabilities with recourse, at fair value		0	0
FG VIEs’ liabilities without recourse, at fair value		0	0
Total liabilities carried at fair value		0	0
Recurring [Member] | Level 3 [Member]
Assets:
Other invested assets	[1]	7	7
Credit derivative assets		36	81
FG VIEs’ assets, at fair value		814	1,261
Other assets		35	62
Total assets carried at fair value		1,904	2,555
Liabilities:
Credit derivative liabilities		432	446
FG VIEs’ liabilities with recourse, at fair value		790	1,225
FG VIEs’ liabilities without recourse, at fair value		115	124
Total liabilities carried at fair value		1,337	1,795
Fixed Maturities [Member]
Assets:
Fixed-maturity securities		9,960	10,627
Fixed Maturities [Member] | Obligations of state and political subdivisions [Member]
Assets:
Fixed-maturity securities		5,603	5,841
Fixed Maturities [Member] | US government and agencies [Member]
Assets:
Fixed-maturity securities		326	400
Fixed Maturities [Member] | Corporate securities [Member]
Assets:
Fixed-maturity securities		1,443	1,520
Fixed Maturities [Member] | RMBS [Member]
Assets:
Fixed-maturity securities	[2]	1,062	1,245
Fixed Maturities [Member] | CMBS [Member]
Assets:
Fixed-maturity securities	[2]	539	513
Fixed Maturities [Member] | Asset-backed Securities [Member]
Assets:
Fixed-maturity securities		730	825
Fixed Maturities [Member] | Foreign government securities [Member]
Assets:
Fixed-maturity securities		257	283
Fixed Maturities [Member] | Recurring [Member]
Assets:
Fixed-maturity securities		9,960	10,627
Fixed Maturities [Member] | Recurring [Member] | Obligations of state and political subdivisions [Member]
Assets:
Fixed-maturity securities		5,603	5,841
Fixed Maturities [Member] | Recurring [Member] | US government and agencies [Member]
Assets:
Fixed-maturity securities		326	400
Fixed Maturities [Member] | Recurring [Member] | Corporate securities [Member]
Assets:
Fixed-maturity securities		1,443	1,520
Fixed Maturities [Member] | Recurring [Member] | RMBS [Member]
Assets:
Fixed-maturity securities		1,062	1,245
Fixed Maturities [Member] | Recurring [Member] | CMBS [Member]
Assets:
Fixed-maturity securities		539	513
Fixed Maturities [Member] | Recurring [Member] | Asset-backed Securities [Member]
Assets:
Fixed-maturity securities		730	825
Fixed Maturities [Member] | Recurring [Member] | Foreign government securities [Member]
Assets:
Fixed-maturity securities		257	283
Fixed Maturities [Member] | Recurring [Member] | Level 1 [Member]
Assets:
Fixed-maturity securities		0	0
Fixed Maturities [Member] | Recurring [Member] | Level 1 [Member] | Obligations of state and political subdivisions [Member]
Assets:
Fixed-maturity securities		0	0
Fixed Maturities [Member] | Recurring [Member] | Level 1 [Member] | US government and agencies [Member]
Assets:
Fixed-maturity securities		0	0
Fixed Maturities [Member] | Recurring [Member] | Level 1 [Member] | Corporate securities [Member]
Assets:
Fixed-maturity securities		0	0
Fixed Maturities [Member] | Recurring [Member] | Level 1 [Member] | RMBS [Member]
Assets:
Fixed-maturity securities		0	0
Fixed Maturities [Member] | Recurring [Member] | Level 1 [Member] | CMBS [Member]
Assets:
Fixed-maturity securities		0	0
Fixed Maturities [Member] | Recurring [Member] | Level 1 [Member] | Asset-backed Securities [Member]
Assets:
Fixed-maturity securities		0	0
Fixed Maturities [Member] | Recurring [Member] | Level 1 [Member] | Foreign government securities [Member]
Assets:
Fixed-maturity securities		0	0
Fixed Maturities [Member] | Recurring [Member] | Level 2 [Member]
Assets:
Fixed-maturity securities		8,948	9,543
Fixed Maturities [Member] | Recurring [Member] | Level 2 [Member] | Obligations of state and political subdivisions [Member]
Assets:
Fixed-maturity securities		5,562	5,833
Fixed Maturities [Member] | Recurring [Member] | Level 2 [Member] | US government and agencies [Member]
Assets:
Fixed-maturity securities		326	400
Fixed Maturities [Member] | Recurring [Member] | Level 2 [Member] | Corporate securities [Member]
Assets:
Fixed-maturity securities		1,385	1,449
Fixed Maturities [Member] | Recurring [Member] | Level 2 [Member] | RMBS [Member]
Assets:
Fixed-maturity securities		713	897
Fixed Maturities [Member] | Recurring [Member] | Level 2 [Member] | CMBS [Member]
Assets:
Fixed-maturity securities		539	513
Fixed Maturities [Member] | Recurring [Member] | Level 2 [Member] | Asset-backed Securities [Member]
Assets:
Fixed-maturity securities		166	168
Fixed Maturities [Member] | Recurring [Member] | Level 2 [Member] | Foreign government securities [Member]
Assets:
Fixed-maturity securities		257	283
Fixed Maturities [Member] | Recurring [Member] | Level 3 [Member]
Assets:
Fixed-maturity securities		1,012	1,084
Fixed Maturities [Member] | Recurring [Member] | Level 3 [Member] | Obligations of state and political subdivisions [Member]
Assets:
Fixed-maturity securities		41	8
Fixed Maturities [Member] | Recurring [Member] | Level 3 [Member] | US government and agencies [Member]
Assets:
Fixed-maturity securities		0	0
Fixed Maturities [Member] | Recurring [Member] | Level 3 [Member] | Corporate securities [Member]
Assets:
Fixed-maturity securities		58	71
Fixed Maturities [Member] | Recurring [Member] | Level 3 [Member] | RMBS [Member]
Assets:
Fixed-maturity securities		349	348
Fixed Maturities [Member] | Recurring [Member] | Level 3 [Member] | CMBS [Member]
Assets:
Fixed-maturity securities		0	0
Fixed Maturities [Member] | Recurring [Member] | Level 3 [Member] | Asset-backed Securities [Member]
Assets:
Fixed-maturity securities		564	657
Fixed Maturities [Member] | Recurring [Member] | Level 3 [Member] | Foreign government securities [Member]
Assets:
Fixed-maturity securities		0	0
Short-term Investments [Member]
Assets:
Fixed-maturity securities		585	396
Short-term Investments [Member] | Recurring [Member]
Assets:
Fixed-maturity securities		585	396
Short-term Investments [Member] | Recurring [Member] | Level 1 [Member]
Assets:
Fixed-maturity securities		521	305
Short-term Investments [Member] | Recurring [Member] | Level 2 [Member]
Assets:
Fixed-maturity securities		64	31
Short-term Investments [Member] | Recurring [Member] | Level 3 [Member]
Assets:
Fixed-maturity securities		$ 0	$ 60
[1]	Excluded from the table above are investments funds of $46 million and $45 million as of June 30, 2016 and December 31, 2015, respectively, measured using NAV per share. Includes Level 3 mortgage loans that are recorded at fair value on a non-recurring basis.
[2]	Government-agency obligations were approximately 47% of mortgage backed securities as of June 30, 2016 and 54% as of December 31, 2015 based on fair value.

Fair Value Measurement - Fair V

Fair Value Measurement - Fair Value Level 3 Rollforward Recurring Basis (Details) - USD ($) $ in Millions		3 Months Ended			6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015		Jun. 30, 2016	Jun. 30, 2015
Total Pretax Realized And Unrealized Gains (Losses) Recorded As Assets [Abstract]
Net Income (loss)	[1]	$ 0			$ 0
Other comprehensive income (loss)	[1]	0			0
Purchases		0			0
Settlements		0			(60)
FG VIE Consolidations		0			0
FG VIE deconsolidations		0			0
Fair value at end of period		0			0
Change in unrealized gains/(losses) related to financial instruments held		0			0
Short-term Investments [Member]
Fair Value Level 3 Rollforward
Fair value at beginning of period		0			60
FG VIEs' assets, at fair value [Member]
Fair Value Level 3 Rollforward
Fair value at beginning of period		1,191	$ 1,495		1,261	$ 1,398
Radian Asset Acquisition			122			122
Total Pretax Realized And Unrealized Gains (Losses) Recorded As Assets [Abstract]
Net Income (loss)	[1],[2]	113	19		109	42
Other comprehensive income (loss)	[1]	0	0		0	0
Purchases		0	0		0	0
Settlements		(490)	(40)		(556)	(70)
FG VIE Consolidations		0	0		0	104
FG VIE deconsolidations		0	0		0	0
Fair value at end of period		814	1,596		814	1,596
Change in unrealized gains/(losses) related to financial instruments held		11	31		15	65
Other Assets and Other Invested Assets [Member]
Fair Value Level 3 Rollforward
Fair value at beginning of period	[3]	49	40		65	37
Radian Asset Acquisition	[3]		2			2
Total Pretax Realized And Unrealized Gains (Losses) Recorded As Assets [Abstract]
Net Income (loss)	[1],[3],[4]	(11)	23		(27)	25
Other comprehensive income (loss)	[1],[3]	0	(1)		0	0
Purchases	[3]	0	0		0	0
Settlements	[3]	0	0		0	0
FG VIE Consolidations	[3]	0	0		0	0
FG VIE deconsolidations	[3]	0	0		0	0
Fair value at end of period	[3]	38	64		38	64
Change in unrealized gains/(losses) related to financial instruments held	[3]	(11)	22		(27)	25
Obligations of state and political subdivisions [Member] | Fixed Maturities [Member]
Fair Value Level 3 Rollforward
Fair value at beginning of period		7	8		8	38
Radian Asset Acquisition			0			0
Total Pretax Realized And Unrealized Gains (Losses) Recorded As Assets [Abstract]
Net Income (loss)	[1],[5]	0	0		0	3
Other comprehensive income (loss)	[1]	1	(1)		1	(3)
Purchases		33	0		33	0
Settlements		0	0	[6]	(1)	(31)	[6]
FG VIE Consolidations		0	0		0	0
FG VIE deconsolidations		0	0		0	0
Fair value at end of period		41	7		41	7
Change in unrealized gains/(losses) related to financial instruments held		1	0		1	0
Corporate securities [Member] | Fixed Maturities [Member]
Fair Value Level 3 Rollforward
Fair value at beginning of period		74	79		71	79
Radian Asset Acquisition			0			0
Total Pretax Realized And Unrealized Gains (Losses) Recorded As Assets [Abstract]
Net Income (loss)	[1],[5]	2	(3)		4	(1)
Other comprehensive income (loss)	[1]	(18)	1		(17)	(1)
Purchases		0	0		0	0
Settlements		0	0		0	0
FG VIE Consolidations		0	0		0	0
FG VIE deconsolidations		0	0		0	0
Fair value at end of period		58	77		58	77
Change in unrealized gains/(losses) related to financial instruments held		(18)	1		(17)	(1)
RMBS [Member] | Fixed Maturities [Member]
Fair Value Level 3 Rollforward
Fair value at beginning of period		360	383		348	425
Radian Asset Acquisition			4			4
Total Pretax Realized And Unrealized Gains (Losses) Recorded As Assets [Abstract]
Net Income (loss)	[1],[5]	4	8		2	17
Other comprehensive income (loss)	[1]	3	(9)		(2)	(4)
Purchases		6	1		40	10
Settlements		(24)	(51)		(39)	(116)
FG VIE Consolidations		0	(1)		0	(1)
FG VIE deconsolidations		0	0		0	0
Fair value at end of period		349	335		349	335
Change in unrealized gains/(losses) related to financial instruments held		2	(7)		(3)	(1)
Asset-backed Securities [Member] | Fixed Maturities [Member]
Fair Value Level 3 Rollforward
Fair value at beginning of period		639	226		657	228
Radian Asset Acquisition			0			0
Total Pretax Realized And Unrealized Gains (Losses) Recorded As Assets [Abstract]
Net Income (loss)	[1],[5]	10	3		11	1
Other comprehensive income (loss)	[1]	(5)	8		(10)	9
Purchases		0	0		0	0
Settlements		(80)	(1)		(94)	(2)
FG VIE Consolidations		0	0		0	0
FG VIE deconsolidations		0	0		0	0
Fair value at end of period		564	236		564	236
Change in unrealized gains/(losses) related to financial instruments held		(4)	8		(10)	9
FG VIEs' liabilities with recourse, at fair value [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value at beginning of period		(1,165)	(1,278)		(1,225)	(1,277)
Radian Asset Acquisition			(114)			(114)
Total Pretax Realized And Unrealized Gains (Losses) Recorded As Liabilities [Abstract]
Net income (loss)	[1],[2]	(112)	(5)		(91)	88
Other comprehensive income (loss)	[1]	0	0		0	0
Purchases		0	0		0	0
Settlements		487	36		526	73
FG VIE consolidations		0	0		0	(131)
FG VIE deconsolidations		0	0		0	0
Fair value at end of period		(790)	(1,361)		(790)	(1,361)
Change in unrealized gains/(losses) related to financial instruments held		(2)	(6)		19	(12)
Financial Guaranty Variable Interest Liabilities without Recourse [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value at beginning of period		(119)	(145)		(124)	(142)
Radian Asset Acquisition			(4)			(4)
Total Pretax Realized And Unrealized Gains (Losses) Recorded As Liabilities [Abstract]
Net income (loss)	[1],[2]	2	(25)		4	(30)
Other comprehensive income (loss)	[1]	0	0		0	0
Purchases		0	0		0	0
Settlements		2	3		5	5
FG VIE consolidations		0	0		0	0
FG VIE deconsolidations		0	0		0	0
Fair value at end of period		(115)	(171)		(115)	(171)
Change in unrealized gains/(losses) related to financial instruments held		2	(14)		3	(19)
Credit Risk Contract [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Fair value at start of period	[7]	(434)	(782)		(365)	(895)
Radian Asset Acquisition	[7]		(215)			(215)
Total Pretax Realized And Unrealized Gains (Losses) Recorded As Net Derivative Asset (Liability) [Abstract]
Net income (loss)	[1],[7],[8]	63	90		3	214
Other comprehensive income (loss)	[1],[7]	0	0		0	0
Purchases	[7]	0	0		0	0
Settlements	[7]	(25)	(19)		(34)	(30)
FG VIE consolidations	[7]	0	0		0	0
FG VIE deconsolidations	[7]	0	0		0	0
Fair value at end of period	[7]	(396)	(926)		(396)	(926)
Change in unrealized gains/(losses) related to financial instruments held	[7]	$ (20)	$ 82		$ (99)	$ 186
[1]	Realized and unrealized gains (losses) from changes in values of Level 3 financial instruments represent gains (losses) from changes in values of those financial instruments only for the periods in which the instruments were classified as Level 3.
[2]	Included in fair value gains (losses) on FG VIEs.
[3]	Includes CCS and other invested assets.
[4]	Recorded in fair value gains (losses) on CCS, net investment income and other income.
[5]	Included in net realized investment gains (losses) and net investment income.
[6]	Primarily non-cash transaction.
[7]	Represents net position of credit derivatives. The consolidated balance sheet presents gross assets and liabilities based on net counterparty exposure.
[8]	Reported in net change in fair value of credit derivatives.

- Quantitative Information - As

- Quantitative Information - Assets (Details) - Income Approach Valuation Technique [Member] - Level 3 [Member] - USD ($) $ / shares in Units, $ in Millions		6 Months Ended		12 Months Ended
		Jun. 30, 2016		Dec. 31, 2015
Obligations of state and political subdivisions [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Asset, fair value		$ 41	[1],[2]	$ 8
Obligations of state and political subdivisions [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield (as a percent)	[1],[2]	4.30%
Obligations of state and political subdivisions [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield (as a percent)	[1],[2]	18.40%
Obligations of state and political subdivisions [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield (as a percent)	[1],[2]	13.20%
Corporate securities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Asset, fair value		$ 58	[1],[2]	$ 71	[3],[4],[5]
Yield (as a percent)		20.30%	[1],[2]	21.80%	[3],[4],[5]
RMBS [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Asset, fair value		$ 349	[1],[2]	$ 348	[3],[4],[5]
RMBS [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield (as a percent)		4.80%	[1],[2]	4.70%	[3],[4],[5]
Conditional prepayment rate (as a percent)		1.60%	[1],[2]	0.30%	[3],[4],[5]
Conditional default rate (as a percent)		0.10%	[1],[2]	2.70%	[3],[4],[5]
Loss severity rate (as a percent)		50.00%	[1],[2]	60.00%	[3],[4],[5]
RMBS [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield (as a percent)		8.50%	[1],[2]	8.20%	[3],[4],[5]
Conditional prepayment rate (as a percent)		9.50%	[1],[2]	9.00%	[3],[4],[5]
Conditional default rate (as a percent)		12.40%	[1],[2]	9.30%	[3],[4],[5]
Loss severity rate (as a percent)		100.00%	[1],[2]	100.00%	[3],[4],[5]
RMBS [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield (as a percent)		6.00%	[1],[2]	6.00%	[3],[4],[5]
Conditional prepayment rate (as a percent)		3.30%	[1],[2]	2.60%	[3],[4],[5]
Conditional default rate (as a percent)		9.40%	[1],[2]	7.00%	[3],[4],[5]
Loss severity rate (as a percent)		75.20%	[1],[2]	74.00%	[3],[4],[5]
Investor-owned utilities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Asset, fair value	[3],[5]			$ 69
Cash flow receipts (as a percent)	[3],[5]			100.00%
Discount factor (as a percent)	[3],[5]			7.00%
Collateral recovery period (in years)	[3],[5]			2 years 11 months
Triple-X Life Insurance Transaction [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Asset, fair value		$ 321	[1],[2]	$ 329	[3],[5]
Triple-X Life Insurance Transaction [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield (as a percent)		4.30%	[1],[2]	3.50%	[3],[5]
Triple-X Life Insurance Transaction [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield (as a percent)		6.80%	[1],[2]	7.50%	[3],[5]
Triple-X Life Insurance Transaction [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield (as a percent)		5.10%	[1],[2]	5.00%	[3],[5]
Pooled corporate obligations [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Asset, fair value		$ 243	[1],[2]	$ 259	[3],[5]
Discount factor (as a percent)		15.00%	[1],[2]	20.00%	[3],[5]
Short-term Investments [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Asset, fair value	[3],[5]			$ 60
Yield (as a percent)	[3],[5]			17.00%
Other invested assets [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Asset, fair value		$ 7		$ 7
Financial Guaranty Variable Interest Entities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Asset, fair value		$ 814	[1],[2]	$ 1,261	[3],[5]
Financial Guaranty Variable Interest Entities [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield (as a percent)		3.20%	[1],[2]	1.90%	[3],[5]
Conditional prepayment rate (as a percent)		2.50%	[1],[2]	0.30%	[3],[5]
Conditional default rate (as a percent)		1.20%	[1],[2]	1.20%	[3],[5]
Loss severity rate (as a percent)		50.00%	[1],[2]	40.00%	[3],[5]
Financial Guaranty Variable Interest Entities [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield (as a percent)		21.50%	[1],[2]	20.00%	[3],[5]
Conditional prepayment rate (as a percent)		8.00%	[1],[2]	9.20%	[3],[5]
Conditional default rate (as a percent)		16.30%	[1],[2]	16.00%	[3],[5]
Loss severity rate (as a percent)		100.00%	[1],[2]	100.00%	[3],[5]
Financial Guaranty Variable Interest Entities [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield (as a percent)		7.00%	[1],[2]	6.40%	[3],[5]
Conditional prepayment rate (as a percent)		5.10%	[1],[2]	3.90%	[3],[5]
Conditional default rate (as a percent)		5.80%	[1],[2]	4.70%	[3],[5]
Loss severity rate (as a percent)		85.40%	[1],[2]	85.90%	[3],[5]
Other Assets [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Asset, fair value		$ 35	[1],[2]	$ 62	[3],[5]
Fair Value Inputs Term		5 years	[1],[2]	5 years	[3],[5]
Other Assets [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Quotes from third party pricing (in dollars per share)		$ 59	[1],[2]	$ 44	[3],[5]
Other Assets [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Quotes from third party pricing (in dollars per share)		61	[1],[2]	46	[3],[5]
Other Assets [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Quotes from third party pricing (in dollars per share)		$ 60	[1],[2]	$ 45	[3],[5]
[1]	Discounted cash flow is used as valuation technique for all financial instruments.
[2]	Excludes several investments recorded in other invested assets with fair value of $7 million.
[3]	Discounted cash flow is used as valuation technique for all financial instruments.
[4]	Excludes obligations of state and political subdivisions investments with fair value of $8 million.
[5]	Excludes several investments recorded in other invested assets with fair value of $7 million.

- Quantitative Information - Li

- Quantitative Information - Liabilities (Details) - Income Approach Valuation Technique [Member] - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Jun. 30, 2016		Dec. 31, 2015
Credit derivative liabilities, net [Member] | Level 3 [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Total liabilities carried at fair value	$ (396)	[1]	$ (365)	[2]
Credit derivative liabilities, net [Member] | Minimum [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Internal floor (as a percent)	0.07%		0.07%
Bank profit (as a percent)	0.038%		0.038%
Hedge cost (as a percent)	0.113%		0.328%
Credit derivative liabilities, net [Member] | Minimum [Member] | Level 3 [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Year 1 loss estimates (as a percent)	0.00%	[1]	0.00%	[2]
Credit derivative liabilities, net [Member] | Maximum [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Internal floor (as a percent)	1.00%		1.00%
Bank profit (as a percent)	15.725%		10.175%
Hedge cost (as a percent)	1.988%		2.82%
Credit derivative liabilities, net [Member] | Maximum [Member] | Level 3 [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Year 1 loss estimates (as a percent)	37.00%	[1]	41.00%	[2]
Credit derivative liabilities, net [Member] | Weighted Average [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Internal floor (as a percent)	0.279%		0.168%
Bank profit (as a percent)	0.997%		1.108%
Hedge cost (as a percent)	0.391%		0.663%
Credit derivative liabilities, net [Member] | Weighted Average [Member] | Level 3 [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Year 1 loss estimates (as a percent)	0.90%	[1]	0.60%	[2]
Financial Guaranty Variable Interest Entities [Member] | Level 3 [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Total liabilities carried at fair value	$ (905)	[1]	$ (1,349)	[2]
Financial Guaranty Variable Interest Entities [Member] | Minimum [Member] | Level 3 [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Loss severity rate (as a percent)	50.00%	[1]	40.00%	[2]
Conditional default rate (as a percent)	1.20%	[1]	1.20%	[2]
Conditional prepayment rate (as a percent)	2.50%	[1]	0.30%	[2]
Yield (as a percent)	3.20%	[1]	1.90%	[2]
Financial Guaranty Variable Interest Entities [Member] | Maximum [Member] | Level 3 [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Loss severity rate (as a percent)	100.00%	[1]	100.00%	[2]
Conditional default rate (as a percent)	16.30%	[1]	16.00%	[2]
Conditional prepayment rate (as a percent)	8.00%	[1]	9.20%	[2]
Yield (as a percent)	21.50%	[1]	20.00%	[2]
Financial Guaranty Variable Interest Entities [Member] | Weighted Average [Member] | Level 3 [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Loss severity rate (as a percent)	85.40%	[1]	85.90%	[2]
Conditional default rate (as a percent)	5.80%	[1]	4.70%	[2]
Conditional prepayment rate (as a percent)	5.10%	[1]	3.90%	[2]
Yield (as a percent)	5.80%	[1]	5.60%	[2]
[1]	Discounted cash flow is used as valuation technique for all financial instruments.
[2]	Discounted cash flow is used as valuation technique for all financial instruments.

Fair Value Measurement - Fair78

Fair Value Measurement - Fair Value of Financial Instruments (Details) - USD ($) $ in Millions		Jun. 30, 2016	Dec. 31, 2015
Assets:
Fixed-maturity securities		$ 10,545	$ 11,023
Short-term investments		585	396
Other invested assets		170	169
Credit derivative assets		36	81
Liabilities:
Credit derivative liabilities		432	446
Investments not carried at fair value, carrying value		96	93
Carrying Amount [Member]
Assets:
Fixed-maturity securities		9,960	10,627
Short-term investments		585	396
Other invested assets	[1]	155	150
Credit derivative assets		36	81
FG VIEs’ assets, at fair value		814	1,261
Other assets		187	206
Liabilities:
Financial guaranty insurance contracts	[2]	3,690	3,998
Long-term debt		1,303	1,300
Credit derivative liabilities		432	446
FG VIEs’ liabilities with recourse, at fair value		790	1,225
FG VIEs’ liabilities without recourse, at fair value		115	124
Other liabilities		7	9
Estimated Fair Value [Member]
Assets:
Fixed-maturity securities		9,960	10,627
Short-term investments		585	396
Other invested assets	[1]	157	152
Credit derivative assets		36	81
FG VIEs’ assets, at fair value		814	1,261
Other assets		187	206
Liabilities:
Financial guaranty insurance contracts	[2]	9,928	8,712
Long-term debt		1,527	1,512
Credit derivative liabilities		432	446
FG VIEs’ liabilities with recourse, at fair value		790	1,225
FG VIEs’ liabilities without recourse, at fair value		115	124
Other liabilities		$ 7	$ 9
[1]	Includes investments not carried at fair value with a carrying value of $96 million and $93 million as of June 30, 2016 and December 31, 2015, respectively. Excludes investments carried under the equity method.
[2]	Carrying amount includes the assets and liabilities related to financial guaranty insurance contract premiums, losses, and salvage and subrogation and other recoverables net of reinsurance.

Financial Guaranty Contracts 79

Financial Guaranty Contracts Accounted for as Credit Derivatives - Credit Derivatives Subordination and Ratings (Details) - USD ($) $ in Millions		Jun. 30, 2016	Dec. 31, 2015
Net Par Outstanding on Credit Derivatives
Net Par Outstanding		$ 20,014	$ 25,594
Pooled corporate obligations [Member]
Net Par Outstanding on Credit Derivatives
Net Par Outstanding		$ 12,653	$ 17,523
Original Subordination (as a percent)	[1]	28.30%	29.20%
Current Subordination (as a percent)	[1]	33.00%	32.30%
Pooled corporate obligations [Member] | Collateralized loan obligations and collateral bond obligations [Member]
Net Par Outstanding on Credit Derivatives
Net Par Outstanding		$ 3,006	$ 5,873
Original Subordination (as a percent)	[1]	29.70%	30.90%
Current Subordination (as a percent)	[1]	55.80%	42.30%
Pooled corporate obligations [Member] | Synthetic investment grade pooled corporate [Member]
Net Par Outstanding on Credit Derivatives
Net Par Outstanding		$ 7,116	$ 7,108
Original Subordination (as a percent)	[1]	21.70%	21.70%
Current Subordination (as a percent)	[1]	19.40%	19.40%
Pooled corporate obligations [Member] | TruPS CDOs [Member]
Net Par Outstanding on Credit Derivatives
Net Par Outstanding		$ 2,531	$ 3,429
Original Subordination (as a percent)	[1]	45.30%	45.80%
Current Subordination (as a percent)	[1]	44.00%	42.60%
Pooled corporate obligations [Member] | Market Value of CDOs of corporate obligations [Member]
Net Par Outstanding on Credit Derivatives
Net Par Outstanding		$ 0	$ 1,113
Original Subordination (as a percent)	[1]	0.00%	17.00%
Current Subordination (as a percent)	[1]	0.00%	30.10%
RMBS [Member] | United States [Member]
Net Par Outstanding on Credit Derivatives
Net Par Outstanding		$ 1,229	$ 1,526
Original Subordination (as a percent)	[1]	25.10%	24.10%
Current Subordination (as a percent)	[1]	40.70%	37.40%
RMBS [Member] | Option Adjustable Rate Mortgage and Alt-A Mortgage [Member] | United States [Member]
Net Par Outstanding on Credit Derivatives
Net Par Outstanding		$ 289	$ 351
Original Subordination (as a percent)	[1]	9.50%	10.50%
Current Subordination (as a percent)	[1]	13.10%	12.70%
RMBS [Member] | Subprime [Member] | United States [Member]
Net Par Outstanding on Credit Derivatives
Net Par Outstanding		$ 925	$ 981
Original Subordination (as a percent)	[1]	27.70%	27.70%
Current Subordination (as a percent)	[1]	45.30%	45.20%
RMBS [Member] | Prime [Member] | United States [Member]
Net Par Outstanding on Credit Derivatives
Net Par Outstanding		$ 0	$ 177
Original Subordination (as a percent)	[1]	0.00%	10.90%
Current Subordination (as a percent)	[1]	0.00%	0.00%
RMBS [Member] | Closed-end [Member] | United States [Member]
Net Par Outstanding on Credit Derivatives
Net Par Outstanding		$ 15	$ 17
Original Subordination (as a percent)	[1]	0.00%	0.00%
Current Subordination (as a percent)	[1]	0.00%	0.00%
CMBS [Member]
Net Par Outstanding on Credit Derivatives
Net Par Outstanding		$ 384	$ 530
Original Subordination (as a percent)	[1]	44.80%	44.80%
Current Subordination (as a percent)	[1]	58.40%	52.60%
Other [Member]
Net Par Outstanding on Credit Derivatives
Net Par Outstanding		$ 5,748	$ 6,015
Original Subordination (as a percent)	[1]	0.00%	0.00%
Current Subordination (as a percent)	[1]	0.00%	0.00%
[1]	Represents the sum of subordinate tranches and over-collateralization and does not include any benefit from excess interest collections that may be used to absorb losses.

Financial Guaranty Contracts 80

Financial Guaranty Contracts Accounted for as Credit Derivatives - Distribution of Credit Derivative Net Par Outstanding by Internal Rating (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Credit Derivatives
Net Par Outstanding	$ 20,014	$ 25,594
BIG [Member]
Credit Derivatives
Net Par Outstanding	1,086	1,609
Credit Concentration Risk [Member] | Derivative, Aggregate Notional Amount [Member]
Credit Derivatives
Net Par Outstanding	$ 20,014	$ 25,594
Percentage of installment premiums denominated in currencies other than the U.S. dollar	100.00%	100.00%
Credit Concentration Risk [Member] | Derivative, Aggregate Notional Amount [Member] | Internal Credit Rating, AAA [Member]
Credit Derivatives
Net Par Outstanding	$ 10,966	$ 14,808
Percentage of installment premiums denominated in currencies other than the U.S. dollar	54.80%	57.90%
Credit Concentration Risk [Member] | Derivative, Aggregate Notional Amount [Member] | Internal Credit Rating, AA [Member]
Credit Derivatives
Net Par Outstanding	$ 4,137	$ 4,821
Percentage of installment premiums denominated in currencies other than the U.S. dollar	20.70%	18.80%
Credit Concentration Risk [Member] | Derivative, Aggregate Notional Amount [Member] | Internal Credit Rating, A [Member]
Credit Derivatives
Net Par Outstanding	$ 2,067	$ 2,144
Percentage of installment premiums denominated in currencies other than the U.S. dollar	10.30%	8.40%
Credit Concentration Risk [Member] | Derivative, Aggregate Notional Amount [Member] | Internal Credit Rating, BBB [Member]
Credit Derivatives
Net Par Outstanding	$ 1,758	$ 2,212
Percentage of installment premiums denominated in currencies other than the U.S. dollar	8.80%	8.60%
Credit Concentration Risk [Member] | Derivative, Aggregate Notional Amount [Member] | BIG [Member]
Credit Derivatives
Net Par Outstanding	$ 1,086	$ 1,609
Percentage of installment premiums denominated in currencies other than the U.S. dollar	5.40%	6.30%

Financial Guaranty Contracts 81

Financial Guaranty Contracts Accounted for as Credit Derivatives - Net Change in Fair Value of Credit Derivatives Gains (Losses) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Credit Derivatives
Realized gains on credit derivatives	$ 18	$ 15	$ 28	$ 38
Net credit derivative losses (paid and payable) recovered and recoverable and other settlements	6	(7)	4	(9)
Realized gains (losses) and other settlements	24	8	32	29
Net unrealized gains (losses):
Net change in unrealized gains (losses) on credit derivatives	39	82	(29)	185
Net change in fair value of credit derivatives	63	90	3	214
Pooled corporate obligations [Member]
Net unrealized gains (losses):
Net change in unrealized gains (losses) on credit derivatives	8	7	(40)	24
CMBS [Member]
Net unrealized gains (losses):
Net change in unrealized gains (losses) on credit derivatives	0	4	0	4
Other [Member]
Net unrealized gains (losses):
Net change in unrealized gains (losses) on credit derivatives	4	9	(1)	20
United States [Member] | RMBS [Member]
Net unrealized gains (losses):
Net change in unrealized gains (losses) on credit derivatives	27	62	12	137
Credit Risk Contract [Member]
Net unrealized gains (losses):
Net change in unrealized gains (losses) on credit derivatives	59	0	70	(1)
Net change in fair value of credit derivatives	8	2	8	13
Net par of terminated credit derivative contracts	$ 2,436	$ 471	$ 2,436	$ 564

Financial Guaranty Contracts 82

Financial Guaranty Contracts Accounted for as Credit Derivatives - CDS Spread and Components of Credit Derivative Assets (Liabilities) (Details) - USD ($) $ in Millions	Jun. 30, 2016		Mar. 31, 2016	Dec. 31, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014
Credit Derivatives
Fair value of credit derivatives before effect of AGC and AGM credit spreads	$ (1,170)			$ (1,448)
Plus: Effect of AGC and AGM credit spreads	774			1,083
Net fair value of credit derivatives	$ (396)	[1]		$ (365)
Credit Risk Contract, 5 Year Spread [Member] | AGC [Member]
Credit Derivatives
Quoted price of CDS contract (as a percent)	2.65%		3.07%	3.76%	3.90%	3.17%	3.23%
Credit Risk Contract, 5 Year Spread [Member] | AGM [Member]
Credit Derivatives
Quoted price of CDS contract (as a percent)	2.65%		3.09%	3.66%	4.10%	3.41%	3.25%
Credit Risk Contract, 1 Year Spread [Member] | AGC [Member]
Credit Derivatives
Quoted price of CDS contract (as a percent)	0.45%		1.05%	1.39%	1.20%	0.60%	0.80%
Credit Risk Contract, 1 Year Spread [Member] | AGM [Member]
Credit Derivatives
Quoted price of CDS contract (as a percent)	0.47%		1.02%	1.31%	1.25%	0.80%	0.85%
[1]	Includes the effects of spreads on both the underlying asset classes and the Company’s own credit spread.

Financial Guaranty Contracts 83

Financial Guaranty Contracts Accounted for as Credit Derivatives - Net Fair Value and Expected Losses of Credit Derivatives by Sector (Details) - USD ($) $ in Millions	Jun. 30, 2016		Dec. 31, 2015
Credit Derivatives
Fair Value of Credit Derivative Asset (Liability), net	$ (396)	[1]	$ (365)
Expected Loss to be (Paid) Recovered	(4)		(16)
Pooled corporate obligations [Member]
Credit Derivatives
Fair Value of Credit Derivative Asset (Liability), net	(124)		(82)
Expected Loss to be (Paid) Recovered	(4)		(5)
RMBS [Member] | United States [Member]
Credit Derivatives
Fair Value of Credit Derivative Asset (Liability), net	(86)		(98)
Expected Loss to be (Paid) Recovered	(29)		(38)
Other [Member]
Credit Derivatives
Fair Value of Credit Derivative Asset (Liability), net	(186)		(185)
Expected Loss to be (Paid) Recovered	$ 29		$ 27
[1]	Includes the effects of spreads on both the underlying asset classes and the Company’s own credit spread.

Financial Guaranty Contracts 84

Financial Guaranty Contracts Accounted for as Credit Derivatives - Effect of Changes in Credit Spread (Details) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2016		Dec. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Credit Risk Derivatives, 100 Percent Widening in Spreads, Effect on Fair Value	[1]	$ (805)
Credit Risk Derivatives, 50 Percent Widening in Spreads, Effect on Fair Value	[1]	(601)
Credit Risk Derivatives, 25 Percent Widening in Spreads, Effect on Fair Value	[1]	(499)
Credit Risk Derivatives, 10 Percent Widening in Spreads, Effect on Fair Value	[1]	(437)
Base Scenario		(396)	[1]	$ (365)
Credit Risk Derivatives, 10 Percent Narrowing in Spreads, Effect on Fair Value	[1]	(358)
Credit Risk Derivatives, 25 Percent Narrowing in Spreads, Effect on Fair Value	[1]	(301)
Credit Risk Derivatives, 50 Percent Narrowing in Spreads, Effect on Fair Value	[1]	(206)
Credit Risk Derivatives, 100 Percent Widening in Spreads, Effect on Unrealized Gain (Loss)	[1]	(409)
Credit Risk Derivatives, 50 Percent Widening in Spreads, Effect on Unrealized Gain (Loss)	[1]	(205)
Credit Risk Derivatives, 25 Percent Widening in Spreads, Effect on Unrealized Gain (Loss)	[1]	(103)
Credit Risk Derivatives, 10 Percent Widening in Spreads, Effect on Unrealized Gain (Loss)	[1]	(41)
Credit Risk Derivatives, Base Scenario, Effect on Unrealized Gain (Loss)	[1]	0
Credit Risk Derivatives, 10 Percent Narrowing in Spreads, Effect on Unrealized Gain (Loss)	[1]	38
Credit Risk Derivatives, 25 Percent Narrowing in Spreads, Effect on Unrealized Gain (Loss)	[1]	95
Credit Risk Derivatives, 50 Percent Narrowing in Spreads, Effect on Unrealized Gain (Loss)	[1]	$ 190
[1]	Includes the effects of spreads on both the underlying asset classes and the Company’s own credit spread.

Financial Guaranty Contracts 85

Financial Guaranty Contracts Accounted for as Credit Derivatives - Narrative (Details)	3 Months Ended	6 Months Ended		12 Months Ended
	Jun. 30, 2016USD ($)Transaction	Jun. 30, 2016USD ($)Transaction	Jun. 30, 2015USD ($)	Dec. 31, 2015USD ($)	May 31, 2016USD ($)	Mar. 31, 2016USD ($)
Credit Derivatives
Estimated remaining weighted average life of credit derivatives (in years)		5 years		5 years 4 months 24 days
Net par outstanding	$ 20,014,000,000	$ 20,014,000,000		$ 25,594,000,000
Gain due to change in methodology in expected recoveries			$ 49,000,000
Collateral agreed to be posted	$ 216,000,000	$ 216,000,000		305,000,000
Market value collateralized debt obligations of corporate obligations [Member]
Credit Derivatives
Average obligor size (less than)	1.00%	1.00%
Maximum exposure of one industry (as a percent)	10.00%	10.00%
Net par outstanding	$ 12,653,000,000	$ 12,653,000,000		17,523,000,000
Other pooled infrastructure [Member]
Credit Derivatives
Net par outstanding	$ 1,600,000,000	$ 1,600,000,000
Pooled infrastructure [Member]
Credit Derivatives
Number of transactions | Transaction	1	1
Remaining other CDS [Member]
Credit Derivatives
Net par outstanding	$ 4,100,000,000	$ 4,100,000,000
CMBS [Member]
Credit Derivatives
Net par outstanding	384,000,000	384,000,000		530,000,000
Collateral Debt Obligations, Collateral Requirement [Member]
Credit Derivatives
Amount of par subject to collateral for which the amount of collateral is capped	1,000,000,000	1,000,000,000				$ 3,700,000,000
Derivative, Collateral Posting Requirement					$ 0
Derivative, Reduction Of Notional Amount	2,700,000,000
Collateral Debt Obligations, Collateral Cap Negotiated [Member]
Credit Derivatives
Amount of par subject to collateral for which the amount of collateral is capped	800,000,000	800,000,000
Collateral Debt Obligations, No Cap Negotiated [Member]
Credit Derivatives
Amount of par subject to collateral for which the amount of collateral is capped	500,000,000	500,000,000				$ 575,000,000
Notional amount subject to collateral based on movements in the mark-to-market valuation of the underlying exposure	208,000,000	208,000,000		221,000,000
Collateral agreed to be posted	216,000,000	216,000,000		305,000,000
Collateral posted, based on mark-to-market valuation	$ 17,000,000	$ 17,000,000		$ 23,000,000
Credit Risk Contract [Member]
Credit Derivatives
Number of terminated transactions | Transaction	2	2

Consolidated Variable Interes86

Consolidated Variable Interest Entities - Narrative (Details)		3 Months Ended		6 Months Ended
		Jun. 30, 2016USD ($)Entity	Jun. 30, 2015USD ($)Entity	Jun. 30, 2016USD ($)Entity	Jun. 30, 2015USD ($)Entity	Dec. 31, 2015USD ($)Entity	Dec. 31, 2014Entity
Variable Interest Entity [Line Items]
Net fair value gains and losses on FG VIEs are expected to reverse to zero at maturity of the VIE debt		$ 0		$ 0
Credit Risk Derivatives at Fair Value before Effect of Credit Spread Net 1 [Abstract]
Fair value gains (losses) on FG VIEs		4,000,000	$ 5,000,000	$ 22,000,000	$ (2,000,000)
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Net loss on consolidation					$ 26,000,000
Variable Interest Entity, Number of Entities to be Consolidated | Entity	[1]			0	1
Credit Risk Derivatives at Fair Value before Effect of Credit Spread Net 1 [Abstract]
Fair value gains (losses) on FG VIEs		$ 4,000,000	$ 5,000,000	$ 22,000,000	$ (2,000,000)
Number of VIE that did not require consolidation | Entity		32	37	32	37	34	32
Variable Interest Entity, Not Primary Beneficiary, Aggregated Disclosure [Member]
Credit Risk Derivatives at Fair Value before Effect of Credit Spread Net 1 [Abstract]
Number of VIE that did not require consolidation | Entity		670		670		750
Residential Mortgage Backed Securities and Other Insurance Products [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Credit Risk Derivatives at Fair Value before Effect of Credit Spread Net 1 [Abstract]
Total unpaid principal balance for the VIEs' assets that were over 90 days or more past due		$ 142,000,000		$ 142,000,000		$ 154,000,000
Difference between the aggregate unpaid principal and aggregate fair value of the VIEs' Assets		655,000,000		655,000,000		804,000,000
Change in the instrument specific credit risk of the VIEs' assets		(3,000,000)	$ (50,000,000)	31,000,000	$ (32,000,000)
Unpaid principal for FG VIEs’ liabilities with recourse		885,000,000		885,000,000		1,436,000,000
Unpaid principal for FG VIEs' liabilities with and without recourse		$ 287,000,000		$ 287,000,000		$ 423,000,000
[1]	Net loss on deconsolidation was de minimis in Six Months 2016, and net loss on consolidation was $26 million in Six Months 2015, and recorded in “fair value gains (losses) on FG VIEs” in the consolidated statement of operations.

Consolidated Variable Interes87

Consolidated Variable Interest Entities - Number of FG VIE's Consolidated (Details) - Entity		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015
Number of FG VIEs Consolidated [Roll Forward]
Number of FG VIE's, Radian Asset acquisition		0	4
Number of FG VIE's, matured		(1)	0
Variable Interest Entity, Primary Beneficiary [Member]
Number of FG VIEs Consolidated [Roll Forward]
Number of FG VIE's consolidated, beginning of period		34	32
Number of FG VIE's consolidated	[1]	0	1
Number of FG VIE's deconsolidated	[1]	(1)	0
Number of FG VIE's consolidated, end of period		32	37
[1]	Net loss on deconsolidation was de minimis in Six Months 2016, and net loss on consolidation was $26 million in Six Months 2015, and recorded in “fair value gains (losses) on FG VIEs” in the consolidated statement of operations.

Consolidated Variable Interes88

Consolidated Variable Interest Entities - Consolidated FG VIE's By Type of Collateral (Details) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Variable Interest Entity [Line Items]
Financial guaranty variable interest entities' assets with recourse, at fair value	$ 694	$ 1,131
Financial guaranty variable interest entities’ liabilities with recourse, at fair value	790	1,225
Financial guaranty variable interest entities' assets without recourse, at fair value	120	130
Financial guaranty variable interest entities’ liabilities without recourse, at fair value	115	124
Financial guaranty variable interest entities’ assets, at fair value	814	1,261
Financial guaranty variable interest entities’ liabilities, at fair value	905	1,349
Life Insurance [Member]
Variable Interest Entity [Line Items]
Financial guaranty variable interest entities' assets with recourse, at fair value	0	347
Financial guaranty variable interest entities’ liabilities with recourse, at fair value	0	347
Manufactured Housing Loans [Member]
Variable Interest Entity [Line Items]
Financial guaranty variable interest entities' assets with recourse, at fair value	78	84
Financial guaranty variable interest entities’ liabilities with recourse, at fair value	78	84
United States [Member] | First Lien [Member] | RMBS [Member]
Variable Interest Entity [Line Items]
Financial guaranty variable interest entities' assets with recourse, at fair value	442	506
Financial guaranty variable interest entities’ liabilities with recourse, at fair value	477	521
United States [Member] | Second Lien [Member] | RMBS [Member]
Variable Interest Entity [Line Items]
Financial guaranty variable interest entities' assets with recourse, at fair value	174	194
Financial guaranty variable interest entities’ liabilities with recourse, at fair value	$ 235	$ 273

Consolidated Variable Interes89

Consolidated Variable Interest Entities - Effect of Consolidating FG VIE's on Financial Information (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Variable Interest Entity [Line Items]
Net earned premiums	[1]	$ 214	$ 219	$ 397	$ 361
Net investment income		98	98	197	199
Net realized investment gains (losses)		10	(9)	(3)	7
Fair value gains (losses) on FG VIEs		4	5	22	(2)
Bargain purchase gain		0	2	0	2
Loss and LAE		102	188	192	206
Income (loss) before income taxes		201	409	266	675
Provision (benefit) for income taxes		55	112	61	177
Net income (loss)		146	297	205	498
Net cash flows provided by (used in) operating activities				(47)	105
Effect on shareholders' equity (decrease) increase		6,250		6,250		$ 6,063
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Net earned premiums		(3)	(5)	(8)	(10)
Net investment income		(2)	(3)	(7)	(6)
Net realized investment gains (losses)		0	3	1	3
Fair value gains (losses) on FG VIEs		4	5	22	(2)
Loss and LAE		(2)	2	4	7
Income (loss) before income taxes		(3)	4	12	(6)
Provision (benefit) for income taxes		(1)	1	4	(3)
Net income (loss)		(2)	3	8	(3)
Net cash flows provided by (used in) operating activities		(1)	$ 15	5	$ 33
Effect on shareholders' equity (decrease) increase		$ (12)		$ (12)		$ (23)
[1]	Excludes $3 million and $5 million for Second Quarter 2016 and 2015, respectively, and $8 million and $10 million for Six Months 2016 and 2015, respectively, related to consolidated FG VIEs.

Investments and Cash - Net Inve

Investments and Cash - Net Investment Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Net Investment Income
Gross investment income	$ 100	$ 100	$ 201	$ 203
Investment expenses	(2)	(2)	(4)	(4)
Net investment income	98	98	197	199
Fixed Maturities, Managed Externally [Member]
Net Investment Income
Gross investment income	77	85	156	167
Fixed Maturities, Managed Internally [Member]
Net Investment Income
Gross investment income	22	14	39	29
Other Investments, Internally Managed [Member]
Net Investment Income
Gross investment income	$ 1	$ 1	$ 6	$ 7

Investments and Cash - Net Real

Investments and Cash - Net Realized Investment Gains (Losses) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Net Realized Investment Gains (Losses)
Gross realized gains on available-for-sale securities	$ 14	$ 8	$ 20	$ 32
Gross realized losses on available-for-sale securities	0	(6)	(2)	(7)
Net realized gains (losses) on other invested assets	1	1	0	1
Other-than-temporary impairment	(5)	(12)	(21)	(19)
Net realized investment gains (losses)	$ 10	$ (9)	$ (3)	$ 7

Investments and Cash - Roll For

Investments and Cash - Roll Forward of Credit Losses in the Investment Portfolio (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Roll Forward of Credit Losses in the Investment Portfolio
Credit losses, beginning of period	$ 107	$ 106	$ 108	$ 124
Additions for credit losses on securities for which an other-than-temporary-impairment was not previously recognized	0	0	2	0
Reductions for securities sold and other settlement during the period	(2)	(7)	(4)	(28)
Additions for credit losses on securities for which an other-than-temporary-impairment was previously recognized	3	5	2	8
Credit losses, end of period	$ 108	$ 104	$ 108	$ 104

Investments and Cash - Fixed Ma

Investments and Cash - Fixed Maturity Securities and Short Term Investments (Details) - USD ($) $ in Millions		Jun. 30, 2016		Dec. 31, 2015
Investments
Percent of Total	[1]	100.00%		100.00%
Amortized Cost		$ 9,986		$ 10,671
Gross Unrealized Gains		652		430
Gross Unrealized Losses		(93)		(78)
Estimated Fair Value		10,545		11,023
AOCI Gain (Loss) on Securities with Other-Than-Temporary Impairment		$ (36)	[2]	$ (21)
Fixed Maturities [Member]
Investments
Percent of Total	[1]	94.00%		96.00%
Amortized Cost		$ 9,401		$ 10,275
Gross Unrealized Gains		652		430
Gross Unrealized Losses		(93)		(78)
Estimated Fair Value		9,960		10,627
AOCI Gain (Loss) on Securities with Other-Than-Temporary Impairment		$ (36)	[2]	$ (21)
Short-term Investments [Member]
Investments
Percent of Total	[1]	6.00%		4.00%
Amortized Cost		$ 585		$ 396
Gross Unrealized Gains		0		0
Gross Unrealized Losses		0		0
Estimated Fair Value		585		396
AOCI Gain (Loss) on Securities with Other-Than-Temporary Impairment		$ 0	[2]	$ 0
Obligations of state and political subdivisions [Member] | Fixed Maturities [Member]
Investments
Percent of Total	[1]	52.00%		52.00%
Amortized Cost		$ 5,143		$ 5,528
Gross Unrealized Gains		461		323
Gross Unrealized Losses		(1)		(10)
Estimated Fair Value		5,603		5,841
AOCI Gain (Loss) on Securities with Other-Than-Temporary Impairment		$ 17	[2]	$ 5
US government and agencies [Member] | Fixed Maturities [Member]
Investments
Percent of Total	[1]	3.00%		3.00%
Amortized Cost		$ 299		$ 377
Gross Unrealized Gains		27		23
Gross Unrealized Losses		0		0
Estimated Fair Value		326		400
AOCI Gain (Loss) on Securities with Other-Than-Temporary Impairment		$ 0	[2]	$ 0
Corporate securities [Member] | Fixed Maturities [Member]
Investments
Percent of Total	[1]	14.00%		14.00%
Amortized Cost		$ 1,402		$ 1,505
Gross Unrealized Gains		79		38
Gross Unrealized Losses		(38)		(23)
Estimated Fair Value		1,443		1,520
AOCI Gain (Loss) on Securities with Other-Than-Temporary Impairment		$ (29)	[2]	$ (13)
RMBS [Member] | Fixed Maturities [Member]
Investments
Percent of Total	[1],[3]	10.00%		11.00%
Amortized Cost		$ 1,037		$ 1,238	[3]
Gross Unrealized Gains	[3]	44		29
Gross Unrealized Losses	[3]	(19)		(22)
Estimated Fair Value	[3]	1,062		1,245
AOCI Gain (Loss) on Securities with Other-Than-Temporary Impairment	[3]	$ (9)	[2]	$ (7)
CMBS [Member] | Fixed Maturities [Member]
Investments
Percent of Total	[1],[3]	5.00%		5.00%
Amortized Cost		$ 505		$ 506	[3]
Gross Unrealized Gains	[3]	34		9
Gross Unrealized Losses	[3]	0		(2)
Estimated Fair Value	[3]	539		513
AOCI Gain (Loss) on Securities with Other-Than-Temporary Impairment	[3]	$ 0	[2]	$ 0
Asset-backed Securities [Member] | Fixed Maturities [Member]
Investments
Percent of Total	[1]	7.00%		8.00%
Amortized Cost		$ 745		$ 831
Gross Unrealized Gains		2		4
Gross Unrealized Losses		(17)		(10)
Estimated Fair Value		730		825
AOCI Gain (Loss) on Securities with Other-Than-Temporary Impairment		$ (15)	[2]	$ (6)
Foreign government securities [Member] | Fixed Maturities [Member]
Investments
Percent of Total	[1]	3.00%		3.00%
Amortized Cost		$ 270		$ 290
Gross Unrealized Gains		5		4
Gross Unrealized Losses		(18)		(11)
Estimated Fair Value		257		283
AOCI Gain (Loss) on Securities with Other-Than-Temporary Impairment		$ 0	[2]	$ 0
[1]	Based on amortized cost.
[2]	Accumulated OCI. See also Note 17, Shareholders' Equity for additional information as applicable.
[3]	Government-agency obligations were approximately 47% of mortgage backed securities as of June 30, 2016 and 54% as of December 31, 2015 based on fair value.

Investments and Cash - Gross Un

Investments and Cash - Gross Unrealized Loss by Length of Time (Details) $ in Millions		Jun. 30, 2016USD ($)Security		Dec. 31, 2015USD ($)Security
Less than 12 months
Fair value		$ 770		$ 1,966
Unrealized loss		(36)		(42)
12 months or more
Fair Value		258		276
Unrealized loss		(57)		(36)
Total
Fair value		1,028		2,242
Unrealized loss		$ (93)		$ (78)
Number of securities
Less than 12 months (in securities) | Security	[1]	68		335
12 months or more (in securities) | Security	[1]	53		71
Total (in securities) | Security	[1]	113		396
Number of securities with OTTI
Less than 12 months (in securities) | Security		8	[1]	9
12 months or more (in securities) | Security		7	[1]	4
Total (in securities) | Security		14	[1]	13
Obligations of state and political subdivisions [Member]
Less than 12 months
Fair value		$ 25		$ 316
Unrealized loss		0		(10)
12 months or more
Fair Value		10		7
Unrealized loss		(1)		0
Total
Fair value		35		323
Unrealized loss		(1)		(10)
US government and agencies [Member]
Less than 12 months
Fair value		10		77
Unrealized loss		0		0
12 months or more
Fair Value		0		0
Unrealized loss		0		0
Total
Fair value		10		77
Unrealized loss		0		0
Corporate securities [Member]
Less than 12 months
Fair value		54		381
Unrealized loss		(5)		(8)
12 months or more
Fair Value		81		95
Unrealized loss		(33)		(15)
Total
Fair value		135		476
Unrealized loss		(38)		(23)
RMBS [Member]
Less than 12 months
Fair value		47		438
Unrealized loss		(5)		(8)
12 months or more
Fair Value		115		90
Unrealized loss		(14)		(14)
Total
Fair value		162		528
Unrealized loss		(19)		(22)
CMBS [Member]
Less than 12 months
Fair value		7		140
Unrealized loss		0		(2)
12 months or more
Fair Value		0		2
Unrealized loss		0		0
Total
Fair value		7		142
Unrealized loss		0		(2)
Asset-backed Securities [Member]
Less than 12 months
Fair value		543		517
Unrealized loss		(17)		(10)
12 months or more
Fair Value		0		0
Unrealized loss		0		0
Total
Fair value		543		517
Unrealized loss		(17)		(10)
Foreign government securities [Member]
Less than 12 months
Fair value		84		97
Unrealized loss		(9)		(4)
12 months or more
Fair Value		52		82
Unrealized loss		(9)		(7)
Total
Fair value		136		179
Unrealized loss		$ (18)		$ (11)
[1]	The number of securities does not add across because lots consisting of the same securities have been purchased at different times and appear in both categories above (i.e., less than 12 months and 12 months or more). If a security appears in both categories, it is counted only once in the total column.

Investments and Cash - Distribu

Investments and Cash - Distribution of Fixed-Maturity Securities by Contractual Maturity (Details) - USD ($) $ in Millions		Jun. 30, 2016	Dec. 31, 2015
Amortized Cost
Amortized Cost		$ 9,986	$ 10,671
Estimated Fair Value
Estimated Fair Value		10,545	11,023
Fixed Maturities [Member]
Amortized Cost
Due within one year		482
Due after one year through five years		1,484
Due after five years through 10 years		1,926
Due after 10 years		3,967
Amortized Cost		9,401	10,275
Estimated Fair Value
Due within one year		484
Due after one year through five years		1,536
Due after five years through 10 years		2,066
Due after 10 years		4,273
Estimated Fair Value		9,960	10,627
Fixed Maturities [Member] | RMBS [Member]
Amortized Cost
Amortized Cost		1,037	1,238	[1]
Estimated Fair Value
Estimated Fair Value	[1]	1,062	1,245
Fixed Maturities [Member] | CMBS [Member]
Amortized Cost
Amortized Cost		505	506	[1]
Estimated Fair Value
Estimated Fair Value	[1]	$ 539	$ 513
[1]	Government-agency obligations were approximately 47% of mortgage backed securities as of June 30, 2016 and 54% as of December 31, 2015 based on fair value.

Investments and Cash - Internal

Investments and Cash - Internally Managed Investment Portfolio (Details) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Schedule of Cost-method Investments [Line Items]
Fixed-maturity securities	$ 10,545	$ 11,023
Other invested assets	170	169
Internally managed portfolio	10,715	11,192
Fixed Maturities, Managed Internally [Member]
Schedule of Cost-method Investments [Line Items]
Fixed-maturity securities	1,208	1,266
Other Invested Assets, Internally Managed [Member]
Schedule of Cost-method Investments [Line Items]
Other invested assets	113	114
Other, Internally Managed [Member]
Schedule of Cost-method Investments [Line Items]
Other invested assets	58	55
Internally Managed Portfolio [Member]
Schedule of Cost-method Investments [Line Items]
Internally managed portfolio	$ 1,379	$ 1,435

Investments and Cash - Narrativ

Investments and Cash - Narrative (Details) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2016USD ($)SecurityPerson	Dec. 31, 2015USD ($)Security
Investment [Line Items]
Accrued investment income	$ 89	$ 99
Government agency obligations as a percentage of total mortgage backed securities	47.00%	54.00%
Number of outside managers managing investment portfolio | Person	4
Number of securities with unrealized losses greater than 10% of book value for 12 months or more | Security	26	9
Total unrealized losses for securities having losses greater than 10% of book value for 12 months or more	$ 55	$ 26
Assets held-in-trust	300	283
Fair market value of company's pledged securities	$ 216	$ 305
Investments [Member] | Internally Managed Portfolio [Member]
Investment [Line Items]
Percentage of installment premiums denominated in currencies other than the U.S. dollar	13.00%	13.00%
AGL Subsidiaries [Member]
Investment [Line Items]
Assets held-in-trust	$ 1,561	$ 1,411

Insurance Company Regulatory 98

Insurance Company Regulatory Requirements - Narrative (Details) $ in Millions	6 Months Ended
	Jun. 30, 2016USD ($)
Affiliated Entity [Member] | Municipal Assurance Corp [Member] | AGM [Member]
Statutory Accounting Practices [Line Items]
Statutory Accounting Practices, Intercompany Transaction, Consideration Transferred	$ 102.5
Affiliated Entity [Member] | AGC [Member] | Municipal Assurance Corp Holdings [Member]
Statutory Accounting Practices [Line Items]
Ownership percentage by noncontrolling owners	39.30%
Statutory Accounting Practices, Intercompany Transaction, Proceeds From Repayment Of Surplus Notes	$ 117.9
Affiliated Entity [Member] | AGM [Member] | Municipal Assurance Corp Holdings [Member]
Statutory Accounting Practices [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent	60.70%
Statutory Accounting Practices, Intercompany Transaction, Proceeds From Repayment Of Surplus Notes	$ 182.1
New York [Member] | AGM [Member]
Statutory Accounting Practices [Line Items]
Threshold for dividend payments as a percentage of policyholder surplus	10.00%
Threshold for dividend payments, percentage of adjusted net investment income	100.00%
Amount available for distribution, current year	$ 244
Amount available for distribution, next fiscal quarter	$ 65
Maryland [Member] | AGC [Member]
Statutory Accounting Practices [Line Items]
Threshold for dividend payments as a percentage of policyholder surplus	10.00%
Threshold for dividend payments, percentage of adjusted net investment income	100.00%
Amount available for distribution, next fiscal quarter	$ 16
Maryland [Member] | AGUS [Member] | AGC [Member]
Statutory Accounting Practices [Line Items]
Amount available for distribution, current year	79
Bermuda [Member] | Assured Guaranty Re [Member]
Statutory Accounting Practices [Line Items]
Amount available for distribution, current year	$ 246
Dividend payment restrictions schedule, percentage of statutory capital	15.00%
Dividend payment restrictions schedule amount of statutory capital	$ 127
Dividend restrictions on statutory capital and surplus (as a percent)	25.00%
Statutory surplus	$ 223
Unencumbered assets	$ 580

Insurance Company Regulatory 99

Insurance Company Regulatory Requirements - Dividends and Surplus Notes By Insurance Company Subsidiaries (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statutory Accounting Practices [Line Items]
Dividends paid				$ 35	$ 37
AGM and AGC [Member] | Affiliated Entity [Member] | Municipal Assurance Corp Holdings [Member]
Statutory Accounting Practices [Line Items]
Distribution to owners		$ 300
Municipal Assurance Corp Holdings [Member] | Affiliated Entity [Member] | Municipal Assurance Corp [Member]
Statutory Accounting Practices [Line Items]
Repayment of surplus notes	[1]	300	$ 0	300	0
AGM [Member] | Affiliated Entity [Member] | Municipal Assurance Corp [Member]
Statutory Accounting Practices [Line Items]
Repayment of surplus notes		100	0	100	0
AGMH [Member] | Affiliated Entity [Member] | AGM [Member]
Statutory Accounting Practices [Line Items]
Dividends paid		32	40	127	106
Repayment of surplus notes		0	0	0	25
AGL [Member] | Affiliated Entity [Member] | Assured Guaranty Re [Member]
Statutory Accounting Practices [Line Items]
Dividends paid		25	35	50	85
AGUS [Member] | Affiliated Entity [Member] | AGC [Member]
Statutory Accounting Practices [Line Items]
Dividends paid		$ 23	$ 15	$ 23	$ 35
[1]	MAC Holdings returned $300 million to AGM and AGC, in proportion to their ownership percentages, in Second Quarter 2016.

Income Taxes - Effective Tax Ra

Income Taxes - Effective Tax Rate Reconciliation and Pretax Income (Loss) and Revenue by Tax Jurisdiction (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Pre-tax Income Taxes and Revenue [Line Items]
Expected tax provision (benefit) at statutory rates in taxable jurisdictions	$ 66	$ 143	$ 84	$ 220
Tax-exempt interest	(13)	(13)	(26)	(27)
Gain on bargain purchase	0	(19)	0	(19)
Change in liability for uncertain tax positions	1	1	2	2
Other	1	0	1	1
Total provision (benefit) for income taxes	$ 55	$ 112	$ 61	$ 177
Effective tax rate (as a percent)	26.90%	27.50%	22.80%	26.20%
Income (loss) before provision for income taxes	$ 201	$ 409	$ 266	$ 675
Revenue	396	695	641	1,064
United States [Member]
Pre-tax Income Taxes and Revenue [Line Items]
Income (loss) before provision for income taxes	194	414	249	637
Revenue	337	618	542	918
Bermuda [Member]
Pre-tax Income Taxes and Revenue [Line Items]
Income (loss) before provision for income taxes	15	5	32	55
Revenue	59	78	101	151
United Kingdom [Member]
Pre-tax Income Taxes and Revenue [Line Items]
Income (loss) before provision for income taxes	(8)	(10)	(15)	(17)
Revenue	$ 0	$ (1)	$ (2)	$ (5)

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015	Mar. 31, 2015
Income Taxes [Line Items]
Realization assessment period	3 years
Accrued interest and penalties, uncertain tax positions	$ 6.2	$ 5.4
Interest and penalties related to uncertain tax positions	1	1
Unrecognized tax benefits that would impact effective tax rate	$ 47	$ 45
United States [Member]
Income Taxes [Line Items]
Corporate tax rate	35.00%
United Kingdom [Member]
Income Taxes [Line Items]
Value added tax rate	20.00%
Corporate tax rate			21.00%
United Kingdom [Member]
Income Taxes [Line Items]
Corporate tax rate	20.00%	20.25%
Subsequent to April 1, 2015 | United Kingdom [Member]
Income Taxes [Line Items]
Corporate tax rate	20.00%
Radian [Member]
Income Taxes [Line Items]
Foreign tax credits acquired	$ 11

Reinsurance and Other Monoli102

Reinsurance and Other Monoline Exposures - Effect of Reinsurance on Statement of Operations (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Premiums Written:
Direct		$ 42	$ 23	$ 63	$ 52
Assumed (1)	[1]	(6)	(1)	(8)	2
Ceded		0	2	(17)	2
Net		36	24	38	56
Premiums Earned:
Direct		220	224	410	372
Assumed		5	12	13	22
Ceded		(11)	(17)	(26)	(33)
Net	[2]	214	219	397	361
Loss and LAE:
Direct		101	186	210	212
Assumed		11	19	(3)	12
Ceded		(10)	(17)	(15)	(18)
Net		$ 102	$ 188	$ 192	$ 206
[1]	(1)Negative assumed premiums written were due to changes in expected debt service schedules.
[2]	Excludes $3 million and $5 million for Second Quarter 2016 and 2015, respectively, and $8 million and $10 million for Six Months 2016 and 2015, respectively, related to consolidated FG VIEs.

Reinsurance and Other Monoli103

Reinsurance and Other Monoline Exposures - Exposure by Reinsurer (Details) $ in Millions	Jun. 30, 2016USD ($)
Ceded Credit Risk [Line Items]
Ceded Par Outstanding	$ 13,024	[1]
Second-to- Pay Insured Par Outstanding	13,262	[1]
Assumed Par Outstanding	18,780	[1]
American Overseas Reinsurance Company Limited [Member]
Ceded Credit Risk [Line Items]
Ceded Par Outstanding	4,511	[1],[2]
Second-to- Pay Insured Par Outstanding	0	[1],[2]
Assumed Par Outstanding	30	[1],[2]
Tokio Marine & Nichido Fire Insurance Co., Ltd. (“Tokio”) [Member]
Ceded Credit Risk [Line Items]
Ceded Par Outstanding	3,887	[1],[2]
Second-to- Pay Insured Par Outstanding	0	[1],[2]
Assumed Par Outstanding	0	[1],[2]
Syncora Guarantee Inc. [Member]
Ceded Credit Risk [Line Items]
Ceded Par Outstanding	2,269	[1],[2]
Second-to- Pay Insured Par Outstanding	1,184	[1],[2]
Assumed Par Outstanding	662	[1],[2]
Mitsui Sumitomo Insurance Co. Ltd. [Member]
Ceded Credit Risk [Line Items]
Ceded Par Outstanding	1,513	[1],[2]
Second-to- Pay Insured Par Outstanding	0	[1],[2]
Assumed Par Outstanding	0	[1],[2]
Aca Financial Guaranty Corp [Member]
Ceded Credit Risk [Line Items]
Ceded Par Outstanding	657	[1]
Second-to- Pay Insured Par Outstanding	33	[1]
Assumed Par Outstanding	0	[1]
Ambac Assurance Corporation [Member]
Ceded Credit Risk [Line Items]
Ceded Par Outstanding	115	[1]
Second-to- Pay Insured Par Outstanding	3,541	[1]
Assumed Par Outstanding	8,862	[1]
National [Member]
Ceded Credit Risk [Line Items]
Ceded Par Outstanding	0	[1],[3]
Second-to- Pay Insured Par Outstanding	4,967	[1],[3]
Assumed Par Outstanding	4,960	[1],[3]
MBIA [Member]
Ceded Credit Risk [Line Items]
Ceded Par Outstanding	0	[1]
Second-to- Pay Insured Par Outstanding	1,357	[1]
Assumed Par Outstanding	414	[1]
FGIC [Member]
Ceded Credit Risk [Line Items]
Ceded Par Outstanding	0	[1]
Second-to- Pay Insured Par Outstanding	1,341	[1]
Assumed Par Outstanding	593	[1]
Ambac Assurance Corp. Segregated account [Member]
Ceded Credit Risk [Line Items]
Ceded Par Outstanding	0	[1]
Second-to- Pay Insured Par Outstanding	81	[1]
Assumed Par Outstanding	645	[1]
CIFG Assurance North America Inc. [Member]
Ceded Credit Risk [Line Items]
Ceded Par Outstanding	0	[1],[4]
Second-to- Pay Insured Par Outstanding	43	[1],[4]
Assumed Par Outstanding	2,488	[1],[4]
Other [Member]
Ceded Credit Risk [Line Items]
Ceded Par Outstanding	72	[1],[2]
Second-to- Pay Insured Par Outstanding	715	[1],[2]
Assumed Par Outstanding	126	[1],[2]
Non-affiliated Reinsurers [Member]
Ceded Credit Risk [Line Items]
Funds held under reinsurance agreements	$ 438
[1]	Includes par related to insured credit derivatives.
[2]	The total collateral posted by all non-affiliated reinsurers required or agreeing to post collateral as of June 30, 2016 was approximately $438 million.
[3]	Rated AA+ by KBRA.
[4]	On July 1, 2016, AGC acquired all of the issued and outstanding capital stock of CIFG Holding Inc., the parent of financial guaranty insurer CIFG. On July 5, 2016, CIFG merged with and into AGC, with AGC as the surviving company. See Note 2, Acquisitions, for additional information.

Reinsurance and Other Monoli104

Reinsurance and Other Monoline Exposures - Reinsurance and Other Monoline Exposures (Details) $ in Millions	Jun. 30, 2016USD ($)
Ceded Credit Risk [Line Items]
Assumed Premium, net of Commissions	$ 70
Ceded Premium, net of Commissions	(50)
Assumed Expected Loss to be Paid	(151)
Ceded Expected Loss to be Paid	102
American Overseas Reinsurance Company Limited [Member]
Ceded Credit Risk [Line Items]
Assumed Premium, net of Commissions	0
Ceded Premium, net of Commissions	(5)
Assumed Expected Loss to be Paid	0
Ceded Expected Loss to be Paid	29
Tokio Marine & Nichido Fire Insurance Co., Ltd. (“Tokio”) [Member]
Ceded Credit Risk [Line Items]
Assumed Premium, net of Commissions	0
Ceded Premium, net of Commissions	(11)
Assumed Expected Loss to be Paid	0
Ceded Expected Loss to be Paid	46
Syncora Guarantee Inc. [Member]
Ceded Credit Risk [Line Items]
Assumed Premium, net of Commissions	13
Ceded Premium, net of Commissions	(20)
Assumed Expected Loss to be Paid	0
Ceded Expected Loss to be Paid	8
Mitsui Sumitomo Insurance Co. Ltd. [Member]
Ceded Credit Risk [Line Items]
Assumed Premium, net of Commissions	0
Ceded Premium, net of Commissions	(2)
Assumed Expected Loss to be Paid	0
Ceded Expected Loss to be Paid	19
Ambac Assurance Corporation [Member]
Ceded Credit Risk [Line Items]
Assumed Premium, net of Commissions	36
Ceded Premium, net of Commissions	0
Assumed Expected Loss to be Paid	(3)
Ceded Expected Loss to be Paid	0
Ambac Assurance Corp. Segregated account [Member]
Ceded Credit Risk [Line Items]
Assumed Premium, net of Commissions	7
Ceded Premium, net of Commissions	0
Assumed Expected Loss to be Paid	(45)
Ceded Expected Loss to be Paid	0
CIFG Assurance North America Inc. [Member]
Ceded Credit Risk [Line Items]
Assumed Premium, net of Commissions	0	[1]
Ceded Premium, net of Commissions	0	[1]
Assumed Expected Loss to be Paid	(71)	[1]
Ceded Expected Loss to be Paid	0	[1]
MBIA [Member]
Ceded Credit Risk [Line Items]
Assumed Premium, net of Commissions	4
Ceded Premium, net of Commissions	0
Assumed Expected Loss to be Paid	(9)
Ceded Expected Loss to be Paid	0
National [Member]
Ceded Credit Risk [Line Items]
Assumed Premium, net of Commissions	6
Ceded Premium, net of Commissions	0
Assumed Expected Loss to be Paid	(6)
Ceded Expected Loss to be Paid	0
FGIC [Member]
Ceded Credit Risk [Line Items]
Assumed Premium, net of Commissions	4
Ceded Premium, net of Commissions	0
Assumed Expected Loss to be Paid	(17)
Ceded Expected Loss to be Paid	0
Other [Member]
Ceded Credit Risk [Line Items]
Assumed Premium, net of Commissions	0
Ceded Premium, net of Commissions	(12)
Assumed Expected Loss to be Paid	0
Ceded Expected Loss to be Paid	$ 0
[1]	On July 1, 2016, AGC acquired all of the issued and outstanding capital stock of CIFG Holding Inc., the parent of financial guaranty insurer CIFG. On July 5, 2016, CIFG merged with and into AGC, with AGC as the surviving company. See Note 2, Acquisitions, for additional information

Reinsurance and Other Monoli105

Reinsurance and Other Monoline Exposures - Narrative (Details) - USD ($)	Jan. 01, 2016	Jan. 01, 2014	Jun. 30, 2016	Dec. 31, 2014	Dec. 31, 2015
Ceded Credit Risk [Line Items]
Fixed-maturity securities			$ 10,545,000,000		$ 11,023,000,000
Assured Guaranty Re [Member]
Ceded Credit Risk [Line Items]
Amounts could be required to pay if third party exercised right to recapture business			49,000,000
AGC [Member]
Ceded Credit Risk [Line Items]
Amounts could be required to pay if third party exercised right to recapture business			32,000,000
Fixed Maturities [Member]
Ceded Credit Risk [Line Items]
Fixed-maturity securities			9,960,000,000		$ 10,627,000,000
Fixed Maturities [Member] | National [Member]
Ceded Credit Risk [Line Items]
Fixed-maturity securities			155,000,000
Fixed Maturities [Member] | Ambac Assurance Corporation [Member]
Ceded Credit Risk [Line Items]
Fixed-maturity securities			139,000,000
Fixed Maturities [Member] | Other [Member]
Ceded Credit Risk [Line Items]
Fixed-maturity securities			8,000,000
Fixed Maturities [Member] | FGIC UK Limited [Member]
Ceded Credit Risk [Line Items]
Fixed-maturity securities			127,000,000
Fixed Maturities [Member] | MBIA [Member]
Ceded Credit Risk [Line Items]
Fixed-maturity securities			243,000,000
Excess of Loss Reinsurance Facility [Member] | AGM, AGC and MAC [Member]
Ceded Credit Risk [Line Items]
Minimum net losses required for attachment of excess of loss reinsurance facility	$ 1,250,000,000	$ 1,500,000,000
Amount of losses covered under the facility	400,000,000	500,000,000
Reinsurance retention policy, excess retention, amount reinsured	360,000,000	$ 450,000,000
Remaining amount of losses covered under the facility	40,000,000
Premiums paid during the period			$ 9,000,000	$ 19,000,000
Fixed maturity securities held for benefit of reinsured companies	$ 9,000,000

Commitments and Contingencies -

Commitments and Contingencies - Narrative (Details) € in Millions, $ in Millions	May 28, 2014EUR (€)	Jun. 30, 2016Plaintiff	Apr. 10, 2015USD ($)	Sep. 25, 2013USD ($)	Nov. 28, 2011USD ($)Transaction
LBIE vs. AG Financial Products [Member] | AG Financial Products Inc. [Member] | Guarantee Obligations [Member]
Commitments and Contingencies Legal Proceedings
Number of credit derivative transactions for which termination payment is alleged to be improperly calculated | Transaction					9
LBIE vs. AG Financial Products [Member] | Lehman Brothers International (Europe) [Member]
Commitments and Contingencies Legal Proceedings
Gain contingency, number of credit derivative transactions with improperly calculated payments | Transaction					28
Pending Litigation [Member] | Houston Casualty Company Europe Vs Assured Guaranty [Member] | AGC [Member]
Commitments and Contingencies Legal Proceedings
Damages sought | €	€ 15
Pending Litigation [Member] | Assured Guaranty Municipal Corp And Assured Guaranty US Holdings vs California And New York Government Entities [Member]
Commitments and Contingencies Legal Proceedings
Number of plaintiffs filing consolidated complaints | Plaintiff		19
Positive Outcome of Litigation [Member] | Pending Litigation [Member] | LBIE vs. AG Financial Products [Member] | AG Financial Products Inc. [Member]
Commitments and Contingencies Legal Proceedings
Termination payments which LBIE owes to AG Financial Products as per calculation of AG Financial Products					$ 29
Positive Outcome of Litigation [Member] | Pending Litigation [Member] | LBIE vs. AG Financial Products [Member] | Lehman Brothers International (Europe) [Member]
Commitments and Contingencies Legal Proceedings
Termination payments which AG Financial Products owes to LBIE as per calculation of LBIE					$ 1,400
Minimum [Member] | Pending Litigation [Member] | Wells Fargo Bank, N.A., Interpleader Complaint [Member] | AGM [Member]
Commitments and Contingencies Legal Proceedings
Increase in losses as a result of an adverse outcome, minimum				$ 10
Minimum [Member] | Positive Outcome of Litigation [Member] | LBIE vs. AG Financial Products [Member] | Lehman Brothers International (Europe) [Member]
Commitments and Contingencies Legal Proceedings
Gain contingency, unrecorded amount			$ 200
Maximum [Member] | Pending Litigation [Member] | Wells Fargo Bank, N.A., Interpleader Complaint [Member] | AGM [Member]
Commitments and Contingencies Legal Proceedings
Increase in losses as a result of an adverse outcome, minimum				$ 20
Maximum [Member] | Positive Outcome of Litigation [Member] | LBIE vs. AG Financial Products [Member] | Lehman Brothers International (Europe) [Member]
Commitments and Contingencies Legal Proceedings
Gain contingency, unrecorded amount			$ 500

Long-Term Debt and Credit Fa107

Long-Term Debt and Credit Facilities - Narrative (Details)	Apr. 07, 2008	Jun. 30, 2003USD ($)Trust	Dec. 31, 2012USD ($)	Jun. 30, 2016USD ($)	Dec. 31, 2015	Oct. 25, 2013USD ($)	Apr. 08, 2005USD ($)Trust
AGC Trust Preferred Securities [Member]
Debt Instrument [Line Items]
Basis points	2.50%
AGM Trust Preferred Securities [Member]
Debt Instrument [Line Items]
Basis points		2.00%
AGM [Member] | AGM CPS securities [Member]
Debt Instrument [Line Items]
Maximum stock purchase obligation of each custodial trust		$ 50,000,000
Aggregate maximum stock purchase obligation of the custodial trusts		$ 200,000,000
Number of custodial trusts | Trust		4
Rate basis for income distributions		one-month LIBOR
Auction interval (in days)		28 days
AGC [Member] | AGM CPS securities [Member]
Debt Instrument [Line Items]
Maximum stock purchase obligation of each custodial trust							$ 200,000,000
Aggregate maximum stock purchase obligation of the custodial trusts							$ 50,000,000
Number of custodial trusts | Trust							4
Rate basis for income distributions	one-month LIBOR
Line of Credit [Member] | Strip Coverage Facility [Member] | AGM [Member]
Debt Instrument [Line Items]
Cumulative strip par exposure terminated				$ 1,500,000,000
Line of Credit [Member] | Revolving Credit Facility [Member] | Wilbur L. Ross [Member]
Debt Instrument [Line Items]
Interest rate, as a percentage of Federal short-term or mid-term interest rate						100.00%
Notes Payable 5.60 Percent [Member] | Notes Payable, Other Payables [Member] | AGMH [Member]
Debt Instrument [Line Items]
Interest rate of debt (as a percent)				5.60%	5.60%
6.25% Notes [Member] | Notes Payable, Other Payables [Member] | AGMH [Member]
Debt Instrument [Line Items]
Interest rate of debt (as a percent)				6.25%	6.25%
QUIBS 6.875 Percent [Member] | Corporate securities [Member] | AGMH [Member]
Debt Instrument [Line Items]
Interest rate of debt (as a percent)				6.875%	6.875%
Senior Notes 7.0 Percent [Member] | Senior Notes [Member] | AGUS [Member]
Debt Instrument [Line Items]
Interest rate of debt (as a percent)				7.00%	7.00%
Senior Notes 5.0 Percent [Member] | Senior Notes [Member] | AGUS [Member]
Debt Instrument [Line Items]
Interest rate of debt (as a percent)				5.00%	5.00%
Intercompany Credit Facility [Member] | Line of Credit [Member] | Revolving Credit Facility [Member] | Wilbur L. Ross [Member] | AGL [Member]
Debt Instrument [Line Items]
Line of credit, outstanding amount				$ 0
Related party, maximum borrowing capacity						$ 225,000,000
Dexia Credit Local (NY) [Member] | Line of Credit [Member] | Strip Coverage Facility [Member] | AGM [Member]
Debt Instrument [Line Items]
Commitment amount				495,000,000
Municipal Assurance Corp [Member] | AGUS [Member]
Debt Instrument [Line Items]
Intercompany debt			$ 90,000,000
Leveraged Leases [Member] | Structured Finance [Member] | Financial Guarantee [Member] | AGM [Member]
Debt Instrument [Line Items]
Possible liquidity claims, gross exposure				$ 1,100,000,000

Long-Term Debt and Credit Fa108

Long-Term Debt and Credit Facilities - Principal and Carrying Amounts of Debt (Details) - USD ($)	Jun. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Principal	$ 1,591,000,000	$ 1,592,000,000
Carrying Value	1,303,000,000	1,300,000,000
AGUS [Member]
Debt Instrument [Line Items]
Principal	850,000,000	850,000,000
Carrying Value	842,000,000	842,000,000
AGMH [Member]
Debt Instrument [Line Items]
Principal	730,000,000	730,000,000
Carrying Value	449,000,000	445,000,000
AGM [Member]
Debt Instrument [Line Items]
Principal	11,000,000	12,000,000
Carrying Value	$ 12,000,000	$ 13,000,000
Senior Notes [Member] | AGUS [Member] | Senior Notes 7.0 Percent [Member]
Debt Instrument [Line Items]
Interest rate of debt (as a percent)	7.00%	7.00%
Principal	$ 200,000,000	$ 200,000,000
Carrying Value	$ 197,000,000	$ 197,000,000
Senior Notes [Member] | AGUS [Member] | Senior Notes 5.0 Percent [Member]
Debt Instrument [Line Items]
Interest rate of debt (as a percent)	5.00%	5.00%
Principal	$ 500,000,000	$ 500,000,000
Carrying Value	495,000,000	495,000,000
Enhanced Junior Subordinated Debentures [Member] | AGUS [Member]
Debt Instrument [Line Items]
Principal	150,000,000	150,000,000
Carrying Value	$ 150,000,000	$ 150,000,000
Corporate securities [Member] | AGMH [Member] | QUIBS 6.875 Percent [Member]
Debt Instrument [Line Items]
Interest rate of debt (as a percent)	6.875%	6.875%
Principal	$ 100,000,000	$ 100,000,000
Carrying Value	$ 69,000,000	$ 69,000,000
Notes Payable, Other Payables [Member] | AGMH [Member] | 6.25% Notes [Member]
Debt Instrument [Line Items]
Interest rate of debt (as a percent)	6.25%	6.25%
Principal	$ 230,000,000	$ 230,000,000
Carrying Value	$ 140,000,000	$ 140,000,000
Notes Payable, Other Payables [Member] | AGMH [Member] | Notes Payable 5.60 Percent [Member]
Debt Instrument [Line Items]
Interest rate of debt (as a percent)	5.60%	5.60%
Principal	$ 100,000,000	$ 100,000,000
Carrying Value	56,000,000	56,000,000
Notes Payable, Other Payables [Member] | AGM [Member]
Debt Instrument [Line Items]
Principal	11,000,000	12,000,000
Carrying Value	12,000,000	13,000,000
Junior Subordinated Debt [Member] | AGMH [Member]
Debt Instrument [Line Items]
Principal	300,000,000	300,000,000
Carrying Value	$ 184,000,000	$ 180,000,000

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Basic EPS:
Net income (loss) attributable to AGL	$ 146	$ 297	$ 205	$ 498
Less: Distributed and undistributed income (loss) available to nonvested shareholders	0	0	0	0
Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries, basic	$ 146	$ 297	$ 205	$ 498
Basic shares	134	150.6	135.1	153.2
Basic EPS (in dollars per share)	$ 1.09	$ 1.97	$ 1.52	$ 3.25
Diluted EPS:
Plus: Re-allocation of undistributed income (loss) available to nonvested shareholders of AGL and subsidiaries	$ 0	$ 0	$ 0	$ 0
Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries, diluted	$ 146	$ 297	$ 205	$ 498
Basic shares	134	150.6	135.1	153.2
Effect of dilutive securities:
Options and restricted stock awards (in shares)	0.8	1	0.8	0.9
Diluted shares	134.8	151.6	135.9	154.1
Diluted EPS (in dollars per share)	$ 1.09	$ 1.96	$ 1.51	$ 3.23
Potentially dilutive securities excluded from computation of EPS because of antidilutive effect	0.6	0.1	0.7	0.4

Shareholders' Equity - Changes

Shareholders' Equity - Changes in AOCI by Component (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance			$ 6,063
Amounts reclassified from AOCI to:
Net realized investment gains (losses)	$ 10	$ (9)	(3)	$ 7
Net investment income	98	98	197	199
Interest expense	(25)	(26)	(51)	(51)
Tax (provision) benefit	(55)	(112)	(61)	(177)
Ending balance	6,250		6,250
Net Unrealized Gains (Losses) on Investments with no Other-Than-Temporary Impairment [Member]
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	350	372	260	367
Other comprehensive income (loss) before reclassifications	84	(136)	179	(118)
Amounts reclassified from AOCI to:
Total amount reclassified from AOCI, net of tax	(8)	0	(13)	(13)
Net current period other comprehensive income (loss)	76	(136)	166	(131)
Ending balance	426	236	426	236
Net Unrealized Gains (Losses) on Investments with no Other-Than-Temporary Impairment [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Amounts reclassified from AOCI to:
Net realized investment gains (losses)	(13)	1	(17)	(19)
Net investment income	0		(3)
Interest expense	0	0	0	0
Total before tax	(13)	1	(20)	(19)
Tax (provision) benefit	5	(1)	7	6
Net Unrealized Gains (Losses) on Investments with Other-Than-Temporary Impairment [Member]
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(21)	5	(15)	4
Other comprehensive income (loss) before reclassifications	(6)	(6)	(23)	(8)
Amounts reclassified from AOCI to:
Total amount reclassified from AOCI, net of tax	3	5	14	8
Net current period other comprehensive income (loss)	(3)	(1)	(9)	0
Ending balance	(24)	4	(24)	4
Net Unrealized Gains (Losses) on Investments with Other-Than-Temporary Impairment [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Amounts reclassified from AOCI to:
Net realized investment gains (losses)	4	8	21	12
Net investment income	0		0
Interest expense	0	0	0	0
Total before tax	4	8	21	12
Tax (provision) benefit	(1)	(3)	(7)	(4)
Accumulated Translation Adjustment [Member]
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(18)	(15)	(16)	(10)
Other comprehensive income (loss) before reclassifications	(8)	6	(10)	1
Amounts reclassified from AOCI to:
Total amount reclassified from AOCI, net of tax	0	0	0	0
Net current period other comprehensive income (loss)	(8)	6	(10)	1
Ending balance	(26)	(9)	(26)	(9)
Accumulated Translation Adjustment [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Amounts reclassified from AOCI to:
Net realized investment gains (losses)	0	0	0	0
Net investment income	0		0
Interest expense	0	0	0	0
Total before tax	0	0	0	0
Tax (provision) benefit	0	0	0	0
Cash Flow Hedge [Member]
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	8	8	8	9
Other comprehensive income (loss) before reclassifications	0	0	0	0
Amounts reclassified from AOCI to:
Total amount reclassified from AOCI, net of tax	(1)	0	(1)	(1)
Net current period other comprehensive income (loss)	(1)	0	(1)	(1)
Ending balance	7	8	7	8
Cash Flow Hedge [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Amounts reclassified from AOCI to:
Net realized investment gains (losses)	0	0	0	0
Net investment income	0		0
Interest expense	(1)	0	(1)	(1)
Total before tax	(1)	0	(1)	(1)
Tax (provision) benefit	0	0	0	0
Accumulated Other Comprehensive Income [Member]
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	319	370	237	370
Other comprehensive income (loss) before reclassifications	70	(136)	146	(125)
Amounts reclassified from AOCI to:
Total amount reclassified from AOCI, net of tax	(6)	5	0	(6)
Net current period other comprehensive income (loss)	64	(131)	146	(131)
Ending balance	383	239	383	239
Accumulated Other Comprehensive Income [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Amounts reclassified from AOCI to:
Net realized investment gains (losses)	(9)	9	4	(7)
Net investment income	0		(3)
Interest expense	(1)	0	(1)	(1)
Total before tax	(10)	9	0	(8)
Tax (provision) benefit	$ 4	$ (4)	$ 0	$ 2

Shareholders' Equity - Shares R

Shareholders' Equity - Shares Repurchased (Details) - USD ($)	1 Months Ended	3 Months Ended						6 Months Ended		7 Months Ended	12 Months Ended			43 Months Ended
	Aug. 03, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2016	Jun. 30, 2015	Aug. 03, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Aug. 03, 2016	Feb. 24, 2016
Equity, Class of Treasury Stock [Line Items]
Repurchases of common stock								$ 135,000,000	$ 285,000,000
Common Stock [Member]
Equity, Class of Treasury Stock [Line Items]
Shares repurchased		2,331,474	3,038,928	5,035,637	5,362,103	4,737,388	5,860,291	5,370,402			20,995,419	24,413,781	12,512,759
Repurchases of common stock		$ 60,000,000	$ 75,000,000	$ 135,000,000	$ 135,000,000	$ 133,000,000	$ 152,000,000	$ 135,000,000			$ 555,000,000	$ 590,000,000	$ 264,000,000
Average price paid (in dollars per share)		$ 25.73	$ 24.69	$ 26.81	$ 25.17	$ 28.13	$ 25.87	$ 25.14			$ 26.43	$ 24.17	$ 21.12
Remaining capacity of shares repurchase program		$ 170,000,000						$ 170,000,000
Authorized repurchase amount															$ 250,000,000
Subsequent Event [Member] | Common Stock [Member]
Equity, Class of Treasury Stock [Line Items]
Shares repurchased	772,635									6,143,037				64,064,996
Repurchases of common stock	$ 20,000,000									$ 155,000,000				$ 1,564,000,000
Average price paid (in dollars per share)	$ 25.89									$ 25.24				$ 24.42
Remaining capacity of shares repurchase program	$ 150,000,000									$ 150,000,000				$ 150,000,000

Subsidiary Information - Conden

Subsidiary Information - Condensed Consolidating Balance Sheet (Details) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Assets
Total investment portfolio and cash	$ 10,905	$ 11,358
Investment in subsidiaries	0	0
Premiums receivable, net of commissions payable	623	693
Ceded unearned premium reserve	228	232
Deferred acquisition costs	110	114
Reinsurance recoverable on unpaid losses	82	69
Credit derivative assets	36	81
Deferred tax asset, net	235	276
Intercompany receivable	0	0
Financial guaranty variable interest entities’ assets, at fair value	814	1,261
Funds restricted for CIFG acquisition	451	0
Other	608	460
Total assets	14,092	14,544
Liabilities and shareholders’ equity
Unearned premium reserve	3,617	3,996
Loss and loss adjustment expense reserve	1,268	1,067
Long-term debt	1,303	1,300
Intercompany payable	0	0
Credit derivative liabilities	432	446
Deferred tax liabilities, net	0	0
Financial guaranty variable interest entities’ liabilities, at fair value	905	1,349
Other	317	323
Total liabilities	7,842	8,481
Effect on shareholders' equity (decrease) increase	6,250	6,063
Noncontrolling interest	0	0
Total shareholders' equity	6,250	6,063
Total liabilities and shareholders’ equity	14,092	14,544
Reportable Legal Entities [Member] | Assured Guaranty Ltd. (Parent) [Member]
Assets
Total investment portfolio and cash	42	10
Investment in subsidiaries	6,173	5,961
Premiums receivable, net of commissions payable	0	0
Ceded unearned premium reserve	0	0
Deferred acquisition costs	0	0
Reinsurance recoverable on unpaid losses	0	0
Credit derivative assets	0	0
Deferred tax asset, net	0	0
Intercompany receivable	0	0
Financial guaranty variable interest entities’ assets, at fair value	0	0
Funds restricted for CIFG acquisition	0
Other	39	98
Total assets	6,254	6,069
Liabilities and shareholders’ equity
Unearned premium reserve	0	0
Loss and loss adjustment expense reserve	0	0
Long-term debt	0	0
Intercompany payable	0	0
Credit derivative liabilities	0	0
Deferred tax liabilities, net	0	0
Financial guaranty variable interest entities’ liabilities, at fair value	0	0
Other	4	6
Total liabilities	4	6
Effect on shareholders' equity (decrease) increase	6,250	6,063
Noncontrolling interest	0	0
Total shareholders' equity	6,250	6,063
Total liabilities and shareholders’ equity	6,254	6,069
Reportable Legal Entities [Member] | AGUS (Issuer) [Member]
Assets
Total investment portfolio and cash	85	156
Investment in subsidiaries	5,705	5,569
Premiums receivable, net of commissions payable	0	0
Ceded unearned premium reserve	0	0
Deferred acquisition costs	0	0
Reinsurance recoverable on unpaid losses	0	0
Credit derivative assets	0	0
Deferred tax asset, net	29	52
Intercompany receivable	0	0
Financial guaranty variable interest entities’ assets, at fair value	0	0
Funds restricted for CIFG acquisition	0
Other	63	29
Total assets	5,882	5,806
Liabilities and shareholders’ equity
Unearned premium reserve	0	0
Loss and loss adjustment expense reserve	0	0
Long-term debt	842	842
Intercompany payable	90	90
Credit derivative liabilities	0	0
Deferred tax liabilities, net	0	0
Financial guaranty variable interest entities’ liabilities, at fair value	0	0
Other	15	82
Total liabilities	947	1,014
Effect on shareholders' equity (decrease) increase	4,935	4,792
Noncontrolling interest	0	0
Total shareholders' equity	4,935	4,792
Total liabilities and shareholders’ equity	5,882	5,806
Reportable Legal Entities [Member] | AGMH (Issuer) [Member]
Assets
Total investment portfolio and cash	20	22
Investment in subsidiaries	4,167	4,081
Premiums receivable, net of commissions payable	0	0
Ceded unearned premium reserve	0	0
Deferred acquisition costs	0	0
Reinsurance recoverable on unpaid losses	0	0
Credit derivative assets	0	0
Deferred tax asset, net	0	0
Intercompany receivable	0	0
Financial guaranty variable interest entities’ assets, at fair value	0	0
Funds restricted for CIFG acquisition	0
Other	35	26
Total assets	4,222	4,129
Liabilities and shareholders’ equity
Unearned premium reserve	0	0
Loss and loss adjustment expense reserve	0	0
Long-term debt	449	445
Intercompany payable	0	0
Credit derivative liabilities	0	0
Deferred tax liabilities, net	90	91
Financial guaranty variable interest entities’ liabilities, at fair value	0	0
Other	14	15
Total liabilities	553	551
Effect on shareholders' equity (decrease) increase	3,669	3,578
Noncontrolling interest	0	0
Total shareholders' equity	3,669	3,578
Total liabilities and shareholders’ equity	4,222	4,129
Reportable Legal Entities [Member] | Other Entities [Member]
Assets
Total investment portfolio and cash	11,113	11,530
Investment in subsidiaries	284	377
Premiums receivable, net of commissions payable	748	833
Ceded unearned premium reserve	1,189	1,266
Deferred acquisition costs	167	176
Reinsurance recoverable on unpaid losses	532	467
Credit derivative assets	144	207
Deferred tax asset, net	335	357
Intercompany receivable	90	90
Financial guaranty variable interest entities’ assets, at fair value	814	1,261
Funds restricted for CIFG acquisition	451
Other	756	571
Total assets	16,623	17,135
Liabilities and shareholders’ equity
Unearned premium reserve	4,675	5,143
Loss and loss adjustment expense reserve	1,790	1,537
Long-term debt	12	13
Intercompany payable	300	300
Credit derivative liabilities	540	572
Deferred tax liabilities, net	0	0
Financial guaranty variable interest entities’ liabilities, at fair value	905	1,349
Other	692	622
Total liabilities	8,914	9,536
Effect on shareholders' equity (decrease) increase	7,425	7,222
Noncontrolling interest	284	377
Total shareholders' equity	7,709	7,599
Total liabilities and shareholders’ equity	16,623	17,135
Consolidating Adjustments [Member]
Assets
Total investment portfolio and cash	(355)	(360)
Investment in subsidiaries	(16,329)	(15,988)
Premiums receivable, net of commissions payable	(125)	(140)
Ceded unearned premium reserve	(961)	(1,034)
Deferred acquisition costs	(57)	(62)
Reinsurance recoverable on unpaid losses	(450)	(398)
Credit derivative assets	(108)	(126)
Deferred tax asset, net	(129)	(133)
Intercompany receivable	(90)	(90)
Financial guaranty variable interest entities’ assets, at fair value	0	0
Funds restricted for CIFG acquisition	0
Other	(285)	(264)
Total assets	(18,889)	(18,595)
Liabilities and shareholders’ equity
Unearned premium reserve	(1,058)	(1,147)
Loss and loss adjustment expense reserve	(522)	(470)
Long-term debt	0	0
Intercompany payable	(390)	(390)
Credit derivative liabilities	(108)	(126)
Deferred tax liabilities, net	(90)	(91)
Financial guaranty variable interest entities’ liabilities, at fair value	0	0
Other	(408)	(402)
Total liabilities	(2,576)	(2,626)
Effect on shareholders' equity (decrease) increase	(16,029)	(15,592)
Noncontrolling interest	(284)	(377)
Total shareholders' equity	(16,313)	(15,969)
Total liabilities and shareholders’ equity	$ (18,889)	$ (18,595)

Subsidiary Information - Con113

Subsidiary Information - Condensed Consolidating Statement of Operations (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenues
Net earned premiums	[1]	$ 214	$ 219	$ 397	$ 361
Net investment income		98	98	197	199
Net realized investment gains (losses)		10	(9)	(3)	7
Net change in fair value of credit derivatives:
Realized gains (losses) and other settlements		24	8	32	29
Net unrealized gains (losses)		39	82	(29)	185
Net change in fair value of credit derivatives		63	90	3	214
Bargain purchase gain and settlement of pre-existing relationships		0	214	0	214
Other		11	83	47	69
Total revenues		396	695	641	1,064
Expenses
Loss and LAE		102	188	192	206
Amortization of DAC		5	6	9	10
Interest expense		25	26	51	51
Other operating expenses		63	66	123	122
Total expenses		195	286	375	389
Income (loss) before income taxes		201	409	266	675
Total (provision) benefit for income taxes		(55)	(112)	(61)	(177)
Equity in net earnings of subsidiaries		0	0	0	0
Net income (loss)		146	297	205	498
Less: noncontrolling interest		0	0	0	0
Net income (loss)		146	297	205	498
Comprehensive income (loss)		210	166	351	367
Reportable Legal Entities [Member] | Assured Guaranty Ltd. (Parent) [Member]
Revenues
Net earned premiums		0	0	0	0
Net investment income		0	0	0	0
Net realized investment gains (losses)		0	0	0	0
Net change in fair value of credit derivatives:
Realized gains (losses) and other settlements		0	0	0	0
Net unrealized gains (losses)		0	0	0	0
Net change in fair value of credit derivatives		0	0	0	0
Bargain purchase gain and settlement of pre-existing relationships			0		0
Other		0	0	0	0
Total revenues		0	0	0	0
Expenses
Loss and LAE		0	0	0	0
Amortization of DAC		0	0	0	0
Interest expense		0	0	0	0
Other operating expenses		8	9	16	17
Total expenses		8	9	16	17
Income (loss) before income taxes		(8)	(9)	(16)	(17)
Total (provision) benefit for income taxes		0	0	0	0
Equity in net earnings of subsidiaries		154	306	221	515
Net income (loss)		146	297	205	498
Less: noncontrolling interest		0	0	0	0
Net income (loss)		146	297	205	498
Comprehensive income (loss)		210	166	351	367
Reportable Legal Entities [Member] | AGUS (Issuer) [Member]
Revenues
Net earned premiums		0	0	0	0
Net investment income		0	0	0	0
Net realized investment gains (losses)		0	0	0	0
Net change in fair value of credit derivatives:
Realized gains (losses) and other settlements		0	0	0	0
Net unrealized gains (losses)		0	0	0	0
Net change in fair value of credit derivatives		0	0	0	0
Bargain purchase gain and settlement of pre-existing relationships			0		0
Other		0	0	0	0
Total revenues		0	0	0	0
Expenses
Loss and LAE		0	0	0	0
Amortization of DAC		0	0	0	0
Interest expense		13	13	26	26
Other operating expenses		0	1	0	1
Total expenses		13	14	26	27
Income (loss) before income taxes		(13)	(14)	(26)	(27)
Total (provision) benefit for income taxes		4	4	9	9
Equity in net earnings of subsidiaries		140	305	190	468
Net income (loss)		131	295	173	450
Less: noncontrolling interest		0	0	0	0
Net income (loss)		131	295	173	450
Comprehensive income (loss)		166	210	246	344
Reportable Legal Entities [Member] | AGMH (Issuer) [Member]
Revenues
Net earned premiums		0	0	0	0
Net investment income		0	0	0	0
Net realized investment gains (losses)		0	1	0	1
Net change in fair value of credit derivatives:
Realized gains (losses) and other settlements		0	0	0	0
Net unrealized gains (losses)		0	0	0	0
Net change in fair value of credit derivatives		0	0	0	0
Bargain purchase gain and settlement of pre-existing relationships			0		0
Other		0	0	0	0
Total revenues		0	1	0	1
Expenses
Loss and LAE		0	0	0	0
Amortization of DAC		0	0	0	0
Interest expense		14	14	27	27
Other operating expenses		0	0	1	0
Total expenses		14	14	28	27
Income (loss) before income taxes		(14)	(13)	(28)	(26)
Total (provision) benefit for income taxes		5	4	10	9
Equity in net earnings of subsidiaries		113	122	190	214
Net income (loss)		104	113	172	197
Less: noncontrolling interest		0	0	0	0
Net income (loss)		104	113	172	197
Comprehensive income (loss)		125	50	217	130
Reportable Legal Entities [Member] | Other Entities [Member]
Revenues
Net earned premiums		222	226	414	366
Net investment income		98	101	198	205
Net realized investment gains (losses)		10	(10)	(2)	9
Net change in fair value of credit derivatives:
Realized gains (losses) and other settlements		24	8	32	29
Net unrealized gains (losses)		39	108	(29)	211
Net change in fair value of credit derivatives		63	116	3	240
Bargain purchase gain and settlement of pre-existing relationships			54		54
Other		11	83	47	69
Total revenues		404	570	660	943
Expenses
Loss and LAE		104	184	197	202
Amortization of DAC		7	8	14	14
Interest expense		2	3	5	7
Other operating expenses		55	57	107	105
Total expenses		168	252	323	328
Income (loss) before income taxes		236	318	337	615
Total (provision) benefit for income taxes		(65)	(78)	(81)	(150)
Equity in net earnings of subsidiaries		14	11	23	20
Net income (loss)		185	251	279	485
Less: noncontrolling interest		14	11	23	20
Net income (loss)		171	240	256	465
Comprehensive income (loss)		248	122	426	355
Consolidating Adjustments [Member]
Revenues
Net earned premiums		(8)	(7)	(17)	(5)
Net investment income		0	(3)	(1)	(6)
Net realized investment gains (losses)		0	0	(1)	(3)
Net change in fair value of credit derivatives:
Realized gains (losses) and other settlements		0	0	0	0
Net unrealized gains (losses)		0	(26)	0	(26)
Net change in fair value of credit derivatives		0	(26)	0	(26)
Bargain purchase gain and settlement of pre-existing relationships			160		160
Other		0	0	0	0
Total revenues		(8)	124	(19)	120
Expenses
Loss and LAE		(2)	4	(5)	4
Amortization of DAC		(2)	(2)	(5)	(4)
Interest expense		(4)	(4)	(7)	(9)
Other operating expenses		0	(1)	(1)	(1)
Total expenses		(8)	(3)	(18)	(10)
Income (loss) before income taxes		0	127	(1)	130
Total (provision) benefit for income taxes		1	(42)	1	(45)
Equity in net earnings of subsidiaries		(421)	(744)	(624)	(1,217)
Net income (loss)		(420)	(659)	(624)	(1,132)
Less: noncontrolling interest		(14)	(11)	(23)	(20)
Net income (loss)		(406)	(648)	(601)	(1,112)
Comprehensive income (loss)		$ (539)	$ (382)	$ (889)	$ (829)
[1]	Excludes $3 million and $5 million for Second Quarter 2016 and 2015, respectively, and $8 million and $10 million for Six Months 2016 and 2015, respectively, related to consolidated FG VIEs.

Subsidiary Information - Con114

Subsidiary Information - Condensed Consolidating Statement of Cash Flows (Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Condensed Cash Flow Statements, Captions [Line Items]
Net cash flows provided by (used in) operating activities	$ (47)	$ 105
Fixed-maturity securities:
Purchases	(510)	(1,172)
Sales	739	1,381
Maturities	645	411
Net sales (purchases) of short-term investments	(190)	382
Net proceeds from financial guaranty variable entities’ assets	556	70
Investment in subsidiary	0	0
Acquisition of Radian Asset, net of cash acquired	0	(800)
Cash restricted for CIFG acquisition	(451)	0
Other	(12)	27
Net cash flows provided by (used in) investing activities	777	299
Cash flows from financing activities
Return of capital	0	0
Dividends paid	(35)	(37)
Repurchases of common stock	(135)	(285)
Share activity under option and incentive plans	(1)	(2)
Net paydowns of financial guaranty variable interest entities’ liabilities	(531)	(78)
Payment of long-term debt	(1)	(2)
Net cash flows provided by (used in) financing activities	(703)	(404)
Effect of foreign exchange rate changes	(3)	0
Increase (decrease) in cash	24	0
Cash at beginning of period	166	75	$ 75
Cash at end of period	190	75	166
Reportable Legal Entities [Member] | Assured Guaranty Ltd. (Parent) [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash flows provided by (used in) operating activities	202	343
Fixed-maturity securities:
Purchases	(4)	0
Sales	4	0
Maturities	0	0
Net sales (purchases) of short-term investments	(31)	(19)
Net proceeds from financial guaranty variable entities’ assets	0	0
Investment in subsidiary	0	0
Acquisition of Radian Asset, net of cash acquired		0
Cash restricted for CIFG acquisition	0
Other	0	0
Net cash flows provided by (used in) investing activities	(31)	(19)
Cash flows from financing activities
Return of capital	0	0
Dividends paid	(35)	(37)
Repurchases of common stock	(135)	(285)
Share activity under option and incentive plans	0	(2)
Net paydowns of financial guaranty variable interest entities’ liabilities	0	0
Payment of long-term debt	0	0
Net cash flows provided by (used in) financing activities	(170)	(324)
Effect of foreign exchange rate changes	0	0
Increase (decrease) in cash	1	0
Cash at beginning of period	0	0	0
Cash at end of period	1	0	0
Reportable Legal Entities [Member] | AGUS (Issuer) [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash flows provided by (used in) operating activities	31	138
Fixed-maturity securities:
Purchases	(32)	(67)
Sales	0	159
Maturities	21	6
Net sales (purchases) of short-term investments	(12)	39
Net proceeds from financial guaranty variable entities’ assets	0	0
Investment in subsidiary	0	0
Acquisition of Radian Asset, net of cash acquired		0
Cash restricted for CIFG acquisition	0
Other	0	0
Net cash flows provided by (used in) investing activities	(23)	137
Cash flows from financing activities
Return of capital	0	0
Dividends paid	(103)	(275)
Repurchases of common stock	0	0
Share activity under option and incentive plans	0	0
Net paydowns of financial guaranty variable interest entities’ liabilities	0	0
Payment of long-term debt	0	0
Net cash flows provided by (used in) financing activities	(103)	(275)
Effect of foreign exchange rate changes	0	0
Increase (decrease) in cash	(95)	0
Cash at beginning of period	95	0	0
Cash at end of period	0	0	95
Reportable Legal Entities [Member] | AGMH (Issuer) [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash flows provided by (used in) operating activities	101	83
Fixed-maturity securities:
Purchases	0	(6)
Sales	10	27
Maturities	0	0
Net sales (purchases) of short-term investments	(11)	(1)
Net proceeds from financial guaranty variable entities’ assets	0	0
Investment in subsidiary	0	25
Acquisition of Radian Asset, net of cash acquired		0
Cash restricted for CIFG acquisition	0
Other	0	0
Net cash flows provided by (used in) investing activities	(1)	45
Cash flows from financing activities
Return of capital	0	0
Dividends paid	(103)	(128)
Repurchases of common stock	0	0
Share activity under option and incentive plans	0	0
Net paydowns of financial guaranty variable interest entities’ liabilities	0	0
Payment of long-term debt	0	0
Net cash flows provided by (used in) financing activities	(103)	(128)
Effect of foreign exchange rate changes	0	0
Increase (decrease) in cash	(3)	0
Cash at beginning of period	8	4	4
Cash at end of period	5	4	8
Reportable Legal Entities [Member] | Other Entities [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash flows provided by (used in) operating activities	139	170
Fixed-maturity securities:
Purchases	(474)	(1,099)
Sales	725	1,195
Maturities	624	405
Net sales (purchases) of short-term investments	(136)	363
Net proceeds from financial guaranty variable entities’ assets	556	70
Investment in subsidiary	4	0
Acquisition of Radian Asset, net of cash acquired		(800)
Cash restricted for CIFG acquisition	(451)
Other	(12)	27
Net cash flows provided by (used in) investing activities	836	161
Cash flows from financing activities
Return of capital	(4)	(25)
Dividends paid	(314)	(226)
Repurchases of common stock	0	0
Share activity under option and incentive plans	(1)	0
Net paydowns of financial guaranty variable interest entities’ liabilities	(531)	(78)
Payment of long-term debt	(1)	(2)
Net cash flows provided by (used in) financing activities	(851)	(331)
Effect of foreign exchange rate changes	(3)	0
Increase (decrease) in cash	121	0
Cash at beginning of period	63	71	71
Cash at end of period	184	71	63
Consolidating Adjustments [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash flows provided by (used in) operating activities	(520)	(629)
Fixed-maturity securities:
Purchases	0	0
Sales	0	0
Maturities	0	0
Net sales (purchases) of short-term investments	0	0
Net proceeds from financial guaranty variable entities’ assets	0	0
Investment in subsidiary	(4)	(25)
Acquisition of Radian Asset, net of cash acquired		0
Cash restricted for CIFG acquisition	0
Other	0	0
Net cash flows provided by (used in) investing activities	(4)	(25)
Cash flows from financing activities
Return of capital	4	25
Dividends paid	520	629
Repurchases of common stock	0	0
Share activity under option and incentive plans	0	0
Net paydowns of financial guaranty variable interest entities’ liabilities	0	0
Payment of long-term debt	0	0
Net cash flows provided by (used in) financing activities	524	654
Effect of foreign exchange rate changes	0	0
Increase (decrease) in cash	0	0
Cash at beginning of period	0	0	0
Cash at end of period	$ 0	$ 0	$ 0