10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

☒	QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
	For the quarterly period ended June 30, 2020

or

☐	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
	For the transition period from                      to

Commission File Number         1-9371

ALLEGHANY CORPORATION

(Exact Name of Registrant as Specified in its Charter)

Delaware	51-0283071
State or Other Jurisdiction of	I.R.S. Employer Identification No.
Incorporation or Organization
1411 Broadway, 34th Floor, NY, NY	10018
Address of Principal Executive Offices	Zip Code

212-752-1356

Registrant’s Telephone Number, Including Area Code

Former Name, Former Address and Former Fiscal Year, if Changed Since Last Report

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, $1.00 par value	Y	New York Stock Exchange

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

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

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

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

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

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

APPLICABLE ONLY TO ISSUERS INVOLVED IN BANKRUPTCY PROCEEDINGS DURING THE PRECEDING FIVE YEARS:

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

APPLICABLE ONLY TO CORPORATE ISSUERS

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.

14,312,000 Shares, par value $1.00 per share, as of July 26, 2020

ALLEGHANY CORPORATION

TABLE OF CONTENTS

		Page
PART I
ITEM 1.	Financial Statements	1
ITEM 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	28
ITEM 3.	Quantitative and Qualitative Disclosures About Market Risk	63
ITEM 4.	Controls and Procedures	64
PART II
ITEM 1.	Legal Proceedings	65
ITEM 1A.	Risk Factors	65
ITEM 2.	Unregistered Sales of Equity Securities and Use of Proceeds	67
ITEM 6.	Exhibits	68
SIGNATURES		69

Part I. FINANCIAL INFORMATION

Item 1. Financial Statements.

ALLEGHANY CORPORATION AND SUBSIDIARIES

Consolidated Balance Sheets

	June 30,			December 31,
	2020			2019
	(unaudited)
	($ in thousands, except share amounts)
Assets
Investments:
Securities at fair value:
Equity securities (cost: 2020 – $997,389; 2019 – $1,625,256)	$	1,439,062		$	2,505,496
Debt securities (amortized cost: 2020 – $14,395,510; 2019 – $13,798,576;
allowance for credit losses: 2020 – $8,904)		14,950,006			14,211,745
Short-term investments		1,119,678			914,776
		17,508,746			17,632,017
Commercial mortgage loans		685,412			686,206
Other invested assets		415,333			573,605
Total investments		18,609,491			18,891,828
Cash		1,652,671			1,179,098
Accrued investment income		91,224			96,516
Premium balances receivable		1,089,481			948,010
Reinsurance recoverables		1,539,717			1,681,962
Ceded unearned premiums		291,853			248,153
Deferred acquisition costs		551,984			522,577
Property and equipment at cost, net of accumulated depreciation and amortization		272,360			205,397
Goodwill		613,054			523,021
Intangible assets, net of amortization		808,933			685,953
Current taxes receivable		—			4,081
Net deferred tax assets		48,033			5,860
Funds held under reinsurance agreements		756,284			755,515
Other assets		1,295,786			1,183,633
Total assets	$	27,620,871		$	26,931,604
Liabilities, Redeemable Noncontrolling Interests and Stockholders’ Equity
Loss and loss adjustment expenses	$	12,051,334		$	11,928,359
Unearned premiums		2,773,061			2,566,170
Senior notes and other debt		2,017,903			1,751,113
Reinsurance payable		200,375			188,399
Current taxes payable		12,580			—
Other liabilities		1,881,473			1,516,076
Total liabilities		18,936,726			17,950,117
Redeemable noncontrolling interests		227,906			204,753
Common stock (shares authorized: 2020 and 2019 – 22,000,000; shares issued:    2020 and 2019 – 17,459,961)		17,460			17,460
Contributed capital		3,609,521			3,608,638
Accumulated other comprehensive income		291,993			171,350
Treasury stock, at cost (2020 – 3,148,009 shares; 2019 – 3,095,333 shares)		(1,495,475	)		(1,455,877	)
Retained earnings		6,032,740			6,435,163
Total stockholders’ equity attributable to Alleghany stockholders		8,456,239			8,776,734
Total liabilities, redeemable noncontrolling interests and stockholders’ equity	$	27,620,871		$	26,931,604

See accompanying Notes to Unaudited Consolidated Financial Statements.

1

ALLEGHANY CORPORATION AND SUBSIDIARIES

Consolidated Statements of Earnings and Comprehensive Income

(unaudited)

	Three Months Ended
	June 30,
	2020			2019
	($ in thousands, except per share amounts)
Revenues
Net premiums earned	$	1,394,868		$	1,356,008
Net investment income		118,691			142,745
Change in the fair value of equity securities		242,186			143,660
Net realized capital gains		(38,100	)		12,354
Change in allowance for credit losses on available for sale securities		17,021			—
Noninsurance revenue		492,701			603,906
Total revenues		2,227,367			2,258,673
Costs and Expenses
Net loss and loss adjustment expenses		1,024,362			796,803
Commissions, brokerage and other underwriting expenses		410,017			444,316
Other operating expenses		510,306			581,474
Corporate administration		18,579			25,967
Amortization of intangible assets		12,093			8,795
Interest expense		22,194			25,129
Total costs and expenses		1,997,551			1,882,484
Earnings before income taxes		229,816			376,189
Income taxes		53,356			71,356
Net earnings		176,460			304,833
Net (losses) earnings attributable to noncontrolling interest		(918	)		9,374
Net earnings attributable to Alleghany stockholders	$	177,378		$	295,459
Net earnings	$	176,460		$	304,833
Other comprehensive income (loss):
Change in unrealized gains, net of deferred taxes of $109,432 and $45,881    in 2020 and 2019, respectively		411,673			172,602
Less: reclassification for net realized capital gains and change in allowance for credit losses on available for sale securities, net of taxes of ($1,481) and ($2,594) for 2020 and 2019, respectively		(5,570	)		(9,760	)
Change in unrealized currency translation adjustment, net of deferred taxes    of $3,938 and $844 for 2020 and 2019, respectively		14,814			3,175
Retirement plans		419			104
Comprehensive income		597,796			470,954
Comprehensive income attributable to noncontrolling interests		(918	)		9,374
Comprehensive income attributable to Alleghany stockholders	$	598,714		$	461,580
Basic earnings per share attributable to Alleghany stockholders	$	12.39		$	20.46
Diluted earnings per share attributable to Alleghany stockholders		12.39			20.46

See accompanying Notes to Unaudited Consolidated Financial Statements.

2

ALLEGHANY CORPORATION AND SUBSIDIARIES

Consolidated Statements of Earnings and Comprehensive Income

(unaudited)

	Six Months Ended
	June 30,
	2020			2019
	($ in thousands, except per share amounts)
Revenues
Net premiums earned	$	2,839,288		$	2,653,317
Net investment income		230,673			265,794
Change in the fair value of equity securities		(280,790	)		536,013
Net realized capital gains		(25,074	)		16,796
Change in allowance for credit losses on available for sale securities		(14,354	)		(10,020	)
Noninsurance revenue		960,550			1,118,029
Total revenues		3,710,293			4,579,929
Costs and Expenses
Net loss and loss adjustment expenses		2,051,806			1,589,301
Commissions, brokerage and other underwriting expenses		851,413			864,442
Other operating expenses		976,967			1,083,892
Corporate administration		4,272			45,336
Amortization of intangible assets		21,661			15,695
Interest expense		40,550			48,660
Total costs and expenses		3,946,669			3,647,326
(Losses) earnings before income taxes		(236,376	)		932,603
Income taxes		(51,364	)		179,868
Net (losses) earnings		(185,012	)		752,735
Net (losses) earnings attributable to noncontrolling interest		(1,172	)		17,049
Net (losses) earnings attributable to Alleghany stockholders	$	(183,840	)	$	735,686
Net (losses) earnings	$	(185,012	)	$	752,735
Other comprehensive income (loss):
Change in unrealized gains, net of deferred taxes of $35,898 and $94,630    in 2020 and 2019, respectively		135,043			355,989
Less: reclassification for net realized capital gains and change in allowance for credit losses on available for sale securities, net of taxes of ($4,364) and ($1,423) for 2020 and 2019, respectively		(16,416	)		(5,353	)
Change in unrealized currency translation adjustment, net of deferred taxes    of $287 and $608 for 2020 and 2019, respectively		1,081			2,290
Retirement plans		936			1,041
Comprehensive (loss) income		(64,368	)		1,106,702
Comprehensive (loss) income attributable to noncontrolling interests		(1,172	)		17,049
Comprehensive (loss) income attributable to Alleghany stockholders	$	(63,196	)	$	1,089,653
Basic (losses) earnings per share attributable to Alleghany stockholders	$	(12.83	)	$	50.88
Diluted (losses) earnings per share attributable to Alleghany stockholders		(13.38	)		50.82

See accompanying Notes to Unaudited Consolidated Financial Statements.

3

ALLEGHANY CORPORATION AND SUBSIDIARIES

Consolidated Statements of Changes in Stockholders’ Equity

(unaudited)

	Six Months Ended June 30, 2020
	Common Stock		Contributed Capital			Accumulated Other Comprehensive Income (loss)			Treasury Stock			Retained Earnings			Total Stockholders' Equity Attributable to Alleghany Stockholders			Redeemable Non- controlling Interest
	($ in thousands, except share amounts)
Balance as of December 31, 2019
(17,459,961 shares of common stock issued; 3,095,333 in treasury)	$	17,460	$	3,608,638		$	171,350		$	(1,455,877	)	$	6,435,163		$	8,776,734		$	204,753
Add (deduct):
Cumulative effect of adoption of new accounting pronouncements		—		—			—			—			(3,570	)		(3,570	)		—
Net (losses)		—		—			—			—			(361,218	)		(361,218	)		(254	)
Other comprehensive income (loss), net of tax:
Retirement plans		—		—			517			—			—			517			—
Change in unrealized appreciation of investments, net		—		—			(287,477	)		—			—			(287,477	)		—
Change in unrealized currency translation adjustment, net		—		—			(13,733	)		—			—			(13,733	)		—
Comprehensive (loss)		—		—			(300,693	)		—			(361,218	)		(661,911	)		(254	)
Dividends paid		—		—			—			—			(215,013	)		(215,013	)		—
Treasury stock repurchase		—		—			—			(44,268	)		—			(44,268	)		—
Other, net		—		1,499			—			3,591			—			5,090			3,862
Balance as of March 31, 2020
(17,459,961 shares of common stock issued; 3,150,279 in treasury)		17,460		3,610,137			(129,343	)		(1,496,554	)		5,855,362			7,857,062			208,361
Add (deduct):
Net earnings (losses)		—		—			—			—			177,378			177,378			(918	)
Other comprehensive income (loss), net of tax:
Retirement plans		—		—			419			—			—			419			—
Change in unrealized appreciation of investments, net		—		—			406,103			—			—			406,103			—
Change in unrealized currency translation adjustment, net		—		—			14,814			—			—			14,814			—
Comprehensive income (loss)		—		—			421,336			—			177,378			598,714			(918	)
Treasury stock repurchase		—		—			—						—			—			—
Other, net		—		(616.0	)		—			1,079			—			463			20,463
Balance as of June 30, 2020
(17,459,961 shares of common stock issued; 3,148,009 in treasury)	$	17,460	$	3,609,521		$	291,993		$	(1,495,475	)	$	6,032,740		$	8,456,239		$	227,906

	Six Months Ended June 30, 2019
	Common Stock		Contributed Capital			Accumulated Other Comprehensive Income (loss)			Treasury Stock			Retained Earnings		Total Stockholders' Equity Attributable to Alleghany Stockholders			Redeemable Non- controlling Interest
	($ in thousands, except share amounts)
Balance as of December 31, 2018
(17,459,961 shares of common stock issued; 2,883,452 in treasury)	$	17,460	$	3,612,830		$	(202,003	)	$	(1,312,939	)	$	5,577,362	$	7,692,710		$	169,762
Add (deduct):
Net earnings		—		—			—			—			440,227		440,227			7,675
Other comprehensive income (loss), net of tax:
Retirement plans		—		—			937			—			—		937			—
Change in unrealized appreciation of investments, net		—		—			187,794			—			—		187,794			—
Change in unrealized currency translation adjustment, net		—		—			(885	)		—			—		(885	)		—
Comprehensive income		—		—			187,846			—			440,227		628,073			7,675
Treasury stock repurchase		—		—			—			(80,486	)		—		(80,486	)		—
Other, net		—		(4,176	)		—			366			—		(3,810	)		(1,716	)
Balance as of March 31, 2019
(17,459,961 shares of common stock issued; 3,012,224 in treasury)		17,460		3,608,654			(14,157	)		(1,393,059	)		6,017,589		8,236,487			175,721
Add (deduct):
Net earnings		—		—			—			—			295,459		295,459			9,374
Other comprehensive income (loss), net of tax:
Retirement plans		—		—			104			—			—		104			—
Change in unrealized appreciation of investments, net		—		—			162,842			—			—		162,842			—
Change in unrealized currency translation adjustment, net		—		—			3,175			—			—		3,175			—
Comprehensive income		—		—			166,121			—			295,459		461,580			9,374
Treasury stock repurchase		—		—			—			(12,666	)		—		(12,666	)		—
Other, net		—		(585	)		—			1,098			—		513			(9,523	)
Balance as of June 30, 2019
(17,459,961 shares of common stock issued; 3,029,099 in treasury)	$	17,460	$	3,608,069		$	151,964		$	(1,404,627	)	$	6,313,048	$	8,685,914		$	175,572

See accompanying Notes to Unaudited Consolidated Financial Statements.

4

ALLEGHANY CORPORATION AND SUBSIDIARIES

Consolidated Statements of Cash Flows

(unaudited)

	Six Months Ended
	June 30,
	2020			2019
	($ in thousands)
Cash flows from operating activities
Net (losses) earnings	$	(185,012	)	$	752,735
Adjustments to reconcile net earnings to net cash provided by (used in) operating activities:
Depreciation and amortization		73,417			56,942
Change in the fair value of equity securities		280,790			(536,013	)
Net realized capital (gains) losses		25,074			(16,796	)
Change in allowance for credit losses on available for sale securities		14,354			10,020
(Increase) decrease in reinsurance recoverables, net of reinsurance payable		154,221			271,113
(Increase) decrease in premium balances receivable		(141,471	)		(122,872	)
(Increase) decrease in ceded unearned premiums		(43,700	)		(22,084	)
(Increase) decrease in deferred acquisition costs		(29,407	)		(38,099	)
(Increase) decrease in funds held under reinsurance agreements		(769	)		14,471
Increase (decrease) in unearned premiums		206,891			197,072
Increase (decrease) in loss and loss adjustment expenses		122,975			(618,496	)
Change in unrealized foreign currency exchange rate losses (gains)		53,465			(6,370	)
Other, net		(221,491	)		231,955
Net adjustments		494,349			(579,157	)
Net cash provided by (used in) operating activities		309,337			173,578
Cash flows from investing activities
Purchases of debt securities		(3,813,237	)		(4,197,740	)
Purchases of equity securities		(605,415	)		(134,894	)
Sales of debt securities		2,380,250			1,876,234
Maturities and redemptions of debt securities		788,886			443,555
Sales of equity securities		1,391,193			1,950,478
Net (purchases) sales of short-term investments		(197,843	)		(156,700	)
Net (purchases) sales and maturities of commercial mortgage loans		(794	)		(14,905	)
(Purchases) sales of property and equipment		(17,784	)		(23,942	)
Purchases of affiliates and subsidiaries, net of cash acquired		(123,939	)		(64,084	)
Other, net		470,018			8,842
Net cash provided by (used in) investing activities		271,335			(313,156	)
Cash flows from financing activities
Repayment of senior notes		(307,095	)		—
Treasury stock acquisitions		(44,268	)		(93,152	)
Proceeds from issuance of senior notes		499,335			—
Debt issue costs paid		(4,550	)		—
Increase (decrease) in other debt		(32,171	)		46,006
Cash dividends paid		(215,013	)		—
Other, net		1,898			(31,344	)
Net cash provided by (used in) financing activities		(101,864	)		(78,490	)
Effect of foreign exchange rate changes on cash		(5,235	)		4,123
Net increase (decrease) in cash		473,573			(213,945	)
Cash at beginning of period		1,179,098			1,038,763
Cash at end of period	$	1,652,671		$	824,818
Supplemental disclosures of cash flow information
Cash paid during period for:
Interest paid	$	45,430		$	48,203
Income taxes paid (refund received)		38,222			(20,672	)

See accompanying Notes to Unaudited Consolidated Financial Statements.

5

 ALLEGHANY CORPORATION AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

1. Summary of Significant Accounting Principles

(a) Principles of Financial Statement Presentation

This Quarterly Report on Form 10-Q (this “Form 10-Q”) should be read in conjunction with the Annual Report on Form 10-K for the year ended December 31, 2019 (the “2019 Form 10-K”) and the Quarterly Report on Form 10-Q for the quarter ended March 31, 2020 of Alleghany Corporation (“Alleghany”).

Alleghany Corporation, a Delaware corporation, owns and supports certain operating subsidiaries and manages investments, anchored by a core position in property and casualty reinsurance and insurance. Through its wholly-owned subsidiary Transatlantic Holdings, Inc. (“TransRe”), an Alleghany subsidiary since March 2012, Alleghany is engaged in the property and casualty reinsurance business. Through its wholly-owned subsidiary Alleghany Insurance Holdings LLC (“AIHL”), Alleghany is engaged in the property and casualty insurance business. AIHL’s insurance operations are principally conducted by its subsidiaries RSUI Group, Inc. (“RSUI”) and CapSpecialty, Inc. (“CapSpecialty”). RSUI and CapSpecialty have been subsidiaries of AIHL since July 2003 and January 2002, respectively. AIHL Re LLC (“AIHL Re”), a captive reinsurance company, which provides reinsurance to Alleghany’s current and former insurance operating subsidiaries and affiliates, has been a subsidiary of Alleghany since its formation in May 2006.

Although Alleghany’s primary sources of revenues and earnings are its reinsurance and insurance operations and investments, Alleghany also generates revenues and expenses from a diverse portfolio of non-financial businesses that are owned and managed through its wholly-owned subsidiary Alleghany Capital Corporation (“Alleghany Capital”). Alleghany Capital’s businesses include:

• Precision Cutting Technologies, Inc. (“PCT”), a holding company headquartered in Rockford, Illinois, with four operating businesses: (i) Bourn & Koch, Inc., a provider of precision automated machine tool solutions; (ii) Diamond Technology Innovations, Inc., a manufacturer of waterjet orifices and nozzles and a provider of related services; (iii) Coastal Industrial Distributors, LLC, a provider of high-performance solid carbide end mills; and (iv) as of March 2020, Supermill LLC, a manufacturer of high-performance carbide end mills;

• R.C. Tway Company, LLC (“Kentucky Trailer”), a manufacturer of custom trailers and truck bodies for the moving and storage industry and other markets, headquartered in Louisville, Kentucky;

• IPS-Integrated Project Services, LLC (“IPS”), a design, engineering, procurement, construction management and validation service provider focused on the global pharmaceutical and biotechnology industries, headquartered in Blue Bell, Pennsylvania;

• Jazwares, LLC (together with its affiliates, “Jazwares”), a global toy and musical instrument company, headquartered in Sunrise, Florida;

• WWSC Holdings, LLC (“W&W|AFCO Steel”), a structural steel fabricator and erector, headquartered in Oklahoma City, Oklahoma;

• CHECO Holdings, LLC (“Concord”), a hotel management and development company, headquartered in Raleigh, North Carolina; and

• Wilbert Funeral Services, Inc. (“Wilbert”), a provider of products and services for the funeral and cemetery industries and precast concrete markets, headquartered in Overland Park, Kansas.

On April 1, 2020, Alleghany Capital acquired an additional approximately 55 percent of Wilbert it previously did not own, bringing its equity interest in Wilbert to approximately 100 percent, and as of that date, the results of Wilbert were included in Alleghany’s consolidated results. Prior to April 1, 2020, Wilbert was accounted for under the equity method of accounting and was included in other invested assets.

In addition, Alleghany owns certain other holding-company investments. Alleghany’s wholly-owned subsidiary Stranded Oil Resources Corporation (“SORC”) is an exploration and production company focused on enhanced oil recovery, headquartered in Golden, Colorado. Alleghany’s wholly-owned subsidiary Alleghany Properties Holdings LLC (“Alleghany Properties”) owns and manages certain properties in the Sacramento, California region. Alleghany’s public equity investments are managed primarily through Alleghany’s wholly-owned subsidiary Roundwood Asset Management LLC.

Unless the context otherwise requires, references to “Alleghany” include Alleghany together with its subsidiaries.

The accompanying consolidated financial statements include the results of Alleghany and its wholly-owned and majority-owned subsidiaries and have been prepared in accordance with accounting principles generally accepted in the U.S. (“GAAP”). All material inter-company balances and transactions have been eliminated in consolidation.

6

The portion of stockholders’ equity, net earnings and comprehensive income that is not attributable to Alleghany stockholders is presented on the consolidated balance sheets, the consolidated statements of earnings and comprehensive income and the consolidated statements of changes in stockholders’ equity as noncontrolling interests. Because all noncontrolling interests have the option to sell their ownership interests to Alleghany in the future (generally through 2024), the portion of stockholders’ equity that is not attributable to Alleghany stockholders is presented on the consolidated balance sheets and the consolidated statements of changes in stockholders’ equity as redeemable noncontrolling interests for all periods presented. In addition, Alleghany accretes the redeemable noncontrolling interests up to their future estimated redemption value over the period from the date of issuance to the earliest redemption date. The redemption value of the equity interests is generally based on the subsidiary’s earnings in specified periods preceding the applicable redemption date, calculated based on either a specified formula or an independent fair market valuation. During the first six months of 2020, the noncontrolling interests outstanding were approximately as follows: Kentucky Trailer - 23 percent; IPS - 15 percent; Jazwares - 24 percent; W&W|AFCO Steel - 20 percent; and Concord - 15 percent. Prior to April 1, 2019, the noncontrolling interests of PCT were approximately 11 percent.  All noncontrolling interest holders of PCT have exercised their repurchase options and sold their ownership interests to PCT effective April 1, 2019.

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions. These estimates and assumptions affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements, as well as the reported amounts of revenues and expenses during the reporting period. Alleghany relies on historical experience and on various other assumptions that it believes to be reasonable under the circumstances to make judgments about the carrying value of assets and liabilities and reported revenues and expenses that are not readily apparent from other sources. Actual results may differ materially from those reported results to the extent that those estimates and assumptions prove to be inaccurate. Changes in estimates are reflected in the consolidated statements of earnings and comprehensive income in the period in which the changes are made.

(b) Other Significant Accounting Principles

Alleghany’s significant accounting principles can be found in Note 1 to Notes to Consolidated Financial Statements set forth in Part II, Item 8, “Financial Statements and Supplementary Data” of the 2019 Form 10-K.

(c) Recent Accounting Standards

Recently Adopted - 2019  

In February 2016, the Financial Accounting Standards Board (the “FASB”) issued guidance on leases. Under this guidance, a lessee is required to recognize lease liabilities and corresponding right-of-use assets for leases with terms of more than one year, whereas under the prior guidance, a lessee was only required to recognize assets and liabilities for those leases qualifying as capital leases. This guidance also requires new disclosures about the amount, timing and uncertainty of cash flows arising from leases. The accounting by lessors remains largely unchanged. This guidance became effective in the first quarter of 2019 for public companies, with early adoption permitted. A modified retrospective transition approach was elected for all leases in existence as of, or entered into after, the beginning of the earliest comparative period presented in the financial statements. Alleghany adopted this guidance in the first quarter of 2019 and the implementation did not have a material impact on its results of operations and financial condition. As part of its implementation, Alleghany elected to not separate lease components from non-lease components (such as office cleanings, security and maintenance services provided by Alleghany’s lessors for certain of its leases). Alleghany also elected the package of practical expedients under the transition guidance, which allowed Alleghany to not reevaluate existing lease classifications, among others. As of January 1, 2019, Alleghany’s adoption of this guidance resulted in recognition of an additional right-of-use asset of approximately $0.2 billion and a corresponding lease liability of $0.2 billion. See Note 12(b) to Notes to Consolidated Financial Statements set forth in Part II, Item 8, “Financial Statements and Supplementary Data” of the 2019 Form 10-K for further information on Alleghany’s leases.

In August 2017, the FASB issued guidance that simplifies the requirements to achieve hedge accounting, better reflects the economic results of hedging in financial statements and improves the alignment between hedge accounting and a company’s risk management activities. This guidance was effective in the first quarter of 2019 for public companies, with early adoption permitted. Alleghany adopted this guidance in the first quarter of 2019 and the implementation did not have a material impact on its results of operations and financial condition.

Recently Adopted – 2020  

In June 2016, the FASB issued guidance on credit losses. Under this guidance, a company is required to measure all expected credit losses on loans, reinsurance recoverables and other financial assets accounted for at cost or amortized cost, as applicable, over the remaining expected life of such assets. Estimates of expected credit losses are to be based on historical experience, current conditions and reasonable and supportable forecasts. Under former FASB guidance, credit losses on these assets generally required a company to recognize credit losses when it was probable that a loss had been incurred. Credit losses for securities accounted for on an available for sale (“AFS”) basis are to be measured in a manner similar to GAAP as applied under former guidance and cannot exceed the amount by which the fair value is less than the amortized cost, although the new guidance removes the length of time a security has been in an unrealized loss position as a possible indication of a credit impairment. Credit losses for all financial assets are to be recorded through an allowance for credit losses. Subsequent reversals in credit loss estimates are permitted and are to be recognized in earnings. This guidance also requires new disclosures about the significant estimates and judgments used in estimating credit losses, as well as the credit quality of financial assets. This guidance was effective in the first quarter of 2020 for public companies, with early adoption permitted. Alleghany adopted this guidance in the first quarter of 2020.

7

As of January 1, 2020, Alleghany increased its allowances for credit losses on certain financial assets accounted for at cost or amortized cost by $4.5 million and recorded an after-tax cumulative effect reduction in opening retained earnings of $3.6 million.  The increase in allowances for credit losses primarily relates to reinsurance recoverables and commercial mortgage loans. See Note 4 of this Form 10-Q for further information on Alleghany’s reinsurance recoverables and Note 3(i) of this Form 10-Q for further information on Alleghany’s investments in commercial mortgage loans.  The increase in allowances for credit losses also relates to premium balances receivable. Estimates of expected credit losses for all of these assets are based on certain market-based indicators of credit quality, which are updated on an annual basis and re-assessed at least quarterly. Related credit loss expenses are recorded as a component of other operating expenses.  

As of January 1, 2020, credit losses for Alleghany’s AFS securities are recorded through an allowance for credit losses on the consolidated balance sheets and as a change in allowance for credit losses on AFS securities in the consolidated statements of earnings and comprehensive income.  See Note 3(f) of this Form 10-Q for further information on the credit quality for Alleghany’s AFS securities.

In January 2017, the FASB issued guidance that simplifies the subsequent measurement of goodwill. Under this guidance, if an initial qualitative assessment indicates that the fair value of an operating subsidiary may be less than its carrying amount, an impairment charge is recognized for the amount by which the carrying amount of the operating subsidiary exceeds its estimated fair value. Any resulting impairment loss recognized cannot exceed the total amount of goodwill associated with the operating subsidiary. This guidance was effective in the first quarter of 2020 for public companies, with early adoption permitted. Alleghany adopted this guidance in the first quarter of 2020 and the implementation did not have a material impact on its results of operations and financial condition. See Note 2 to Notes to Consolidated Financial Statements set forth in Part II, Item 8, “Financial Statements and Supplementary Data” of the 2019 Form 10-K for further information on Alleghany’s goodwill.

In August 2018, the FASB issued guidance that changes the financial statement disclosure requirements for measuring fair value. With respect to financial instruments classified as “Level 3” in the fair value disclosure hierarchy, the guidance requires certain additional disclosures for public companies related to amounts included in other comprehensive income and significant unobservable inputs used in the valuation, while removing disclosure requirements related to an entity’s overall valuation processes. The guidance also removes certain disclosure requirements related to transfers between financial instruments classified as “Level 1” and “Level 2” and provides clarification on certain other existing disclosure requirements. This guidance was effective for interim and annual periods beginning after December 15, 2019, with early adoption permitted with respect to any eliminated or modified disclosures. Alleghany adopted this guidance in the first quarter of 2020 and the implementation did not impact its results of operations or financial condition. See Note 2 of this Form 10-Q for further information on the fair value of Alleghany’s financial instruments.

In March 2020, the FASB issued guidance to expedite and simplify the accounting associated with the anticipated migration away from the widely-used London Inter-bank Offered Rate and other similar rates as benchmark interest rates after 2021.  Under pre-existing GAAP, such modifications made to: (i) loans and certain other contracts would require re-assessments of the accounting for those contacts, such as whether they were extinguished and remeasured from an accounting perspective; and (ii) derivative contracts may cause a change in accounting, such as a possible dedesignation of hedge accounting. This new guidance largely eliminates these requirements as a result of this migration to one or more new benchmark rates and is generally applicable for contract modifications made prior to December 31, 2022. Alleghany adopted this guidance in March 2020 and the implementation did not have an impact on its results of operations and financial condition.

2. Fair Value of Financial Instruments

The following table presents the carrying value and estimated fair value of Alleghany’s consolidated financial instruments as of June 30, 2020 and December 31, 2019:

	June 30, 2020				December 31, 2019
	Carrying Value		Fair Value		Carrying Value		Fair Value
	($ in millions)
Assets
Investments (excluding equity method investments and loans)(1)	$	17,509.1	$	17,509.1	$	17,632.3	$	17,632.3
Liabilities
Senior notes and other debt(2)	$	2,017.9	$	2,283.2	$	1,751.1	$	1,962.7

(1) This table includes debt and equity securities, as well as partnership and non-marketable equity investments accounted for at fair value that are included in other invested assets. This table excludes investments accounted for using the equity method and commercial mortgage loans that are accounted for at unpaid principal balance. The fair value of short-term investments approximates amortized cost. The fair value of all other categories of investments is disclosed below.

(2) See Note 11 of this Form 10-Q for additional information on the senior notes and other debt.

8

The following tables present Alleghany’s financial instruments measured at fair value and the level of the fair value hierarchy of inputs used as of June 30, 2020 and December 31, 2019:

	Level 1		Level 2		Level 3		Total
	($ in millions)
As of June 30, 2020
Equity securities:
Common stock	$	1,430.5	$	3.5	$	—	$	1,434.0
Preferred stock		—		3.1		2.0		5.1
Total equity securities		1,430.5		6.6		2.0		1,439.1
Debt securities:
U.S. government obligations		—		1,155.7		—		1,155.7
Municipal bonds		—		2,386.2		—		2,386.2
Foreign government obligations		—		766.8		—		766.8
U.S. corporate bonds		—		3,381.9		620.5		4,002.4
Foreign corporate bonds		—		1,116.7		171.4		1,288.1
Mortgage and asset-backed securities:
Residential mortgage-backed securities (“RMBS”)(1)		—		2,143.3		2.5		2,145.8
Commercial mortgage-backed securities (“CMBS”)		—		865.8		5.5		871.3
Other asset-backed securities(2)		—		1,570.7		763.0		2,333.7
Total debt securities		—		13,387.1		1,562.9		14,950.0
Short-term investments		—		1,119.7		—		1,119.7
Other invested assets(3)		—		—		0.3		0.3
Total investments (excluding equity method investments and loans)	$	1,430.5	$	14,513.4	$	1,565.2	$	17,509.1
Senior notes and other debt	$	—	$	1,844.9	$	438.3	$	2,283.2

	Level 1		Level 2		Level 3		Total
	($ in millions)
As of December 31, 2019
Equity securities:
Common stock	$	2,498.1	$	3.3	$	—	$	2,501.4
Preferred stock		—		2.1		2.0		4.1
Total equity securities		2,498.1		5.4		2.0		2,505.5
Debt securities:
U.S. government obligations		—		1,215.0		—		1,215.0
Municipal bonds		—		2,307.9		—		2,307.9
Foreign government obligations		—		690.7		—		690.7
U.S. corporate bonds		—		2,754.0		605.0		3,359.0
Foreign corporate bonds		—		1,208.7		168.7		1,377.4
Mortgage and asset-backed securities:
RMBS(1)		—		1,838.5		1.9		1,840.4
CMBS		—		865.9		5.8		871.7
Other asset-backed securities(2)		—		1,692.9		856.7		2,549.6
Total debt securities		—		12,573.6		1,638.1		14,211.7
Short-term investments		—		914.8		—		914.8
Other invested assets(3)		—		—		0.3		0.3
Total investments (excluding equity method investments and loans)	$	2,498.1	$	13,493.8	$	1,640.4	$	17,632.3
Senior notes and other debt	$	—	$	1,595.6	$	367.1	$	1,962.7

(1) Primarily includes government agency pass-through securities guaranteed by a government agency or government sponsored enterprise, among other types of RMBS.

(2) Includes $748.5 million and $834.2 million of collateralized loan obligations as of June 30, 2020 and December 31, 2019, respectively.

(3) Includes partnership and non-marketable equity investments accounted for at fair value, and excludes investments accounted for using the equity method.

9

In the three and six months ended June 30, 2020, Alleghany transferred out of Level 3 $3.1 million and $17.8 million, respectively, of financial instruments, principally due to an increase in observable inputs related to the valuation of such assets. Specifically, during the first six months of 2020, there was a decrease in the weight given to non-binding broker quotes and, as a result, there was a corresponding increase in quoted prices for similar assets in active markets. Of the $17.8 million of transfers, $14.5 million related to other asset-backed securities, with the remainder related to foreign corporate bonds.

In the three and six months ended June 30, 2019, Alleghany transferred into Level 3 $1.3 million and $16.0 million, respectively, of financial instruments, principally due to a decrease in observable inputs related to the valuation of such assets.  Specifically, during the first six months of 2019, there was an increase in the weight given to non-binding broker quotes and, as a result, there was a corresponding decrease in quoted prices for similar assets in active markets. Of the $16.0 million of transfers, $14.7 million related to foreign corporate bonds and $1.3 million related to U.S. corporate bonds.

In the three and six months ended June 30, 2019, Alleghany transferred out of Level 3 $13.9 million and $14.9 million, respectively, of financial instruments, principally due to an increase in observable inputs related to the valuation of such assets. Specifically, during the first six months of 2019, there was a decrease in the weight given to non-binding broker quotes, and as a result, there was a corresponding increase in quoted prices for similar assets in active markets. Of the $14.9 million of transfers, $12.1 million related to other asset-backed securities, with the remainder related to other types of debt securities.

The following tables present reconciliations of the changes in Level 3 assets during the six months ended June 30, 2020 and 2019 measured at fair value:

			Debt Securities
									Mortgage and asset-backed
Six Months Ended June 30, 2020	Preferred Stock		U.S. Corporate Bonds			Foreign Corporate Bonds			RMBS			CMBS			Other Asset- backed Securities			Other Invested Assets(1)		Total
	($ in millions)
Balance as of January 1, 2020	$	2.0	$	605.0		$	168.7		$	1.9		$	5.8		$	856.7		$	0.3	$	1,640.4
Net realized/unrealized gains (losses) included in:
Net earnings (losses)(2)		—		(3.8	)		0.1			—			—			(9.5	)		—		(13.2	)
Other comprehensive income (loss)		—		14.6			3.2			(0.2	)		(0.3	)		(24.4	)		—		(7.1	)
Purchases		—		14.0			12.7			1.0			—			46.6			—		74.3
Sales		—		—			(0.8	)		—			—			(54.7	)		—		(55.5	)
Issuances		—		—			—			—			—			—			—		—
Settlements		—		(9.3	)		(9.2	)		(0.2	)		—			(37.2	)		—		(55.9	)
Transfers into Level 3		—		—			—			—			—			—			—		—
Transfers out of Level 3		—		—			(3.3	)		—			—			(14.5	)		—		(17.8	)
Balance as of June 30, 2020	$	2.0	$	620.5		$	171.4		$	2.5		$	5.5		$	763.0		$	0.3	$	1,565.2

				Debt Securities
										Mortgage and asset-backed
Six Months Ended June 30, 2019	Preferred Stock			U.S. Corporate Bonds			Foreign Corporate Bonds			CMBS			Other Asset- backed Securities			Other Invested Assets(1)			Total
	($ in millions)
Balance as of January 1, 2019	$	5.4		$	425.7		$	126.9		$	—		$	1,266.9		$	0.7		$	1,825.6
Net realized/unrealized gains (losses) included in:
Net (losses)(2)		(1.6	)		(10.0	)		(0.1	)		—			(0.7	)		(0.2	)		(12.6	)
Other comprehensive income (loss)		—			31.3			5.4			—			20.5			(0.1	)		57.1
Purchases		0.3			90.9			13.9			0.2			56.8			0.1			162.2
Sales		—			—			(5.6	)		—			(300.2	)		—			(305.8	)
Issuances		—			—			—			—			—			—			—
Settlements		—			(3.6	)		(7.7	)		—			(71.5	)		—			(82.8	)
Transfers into Level 3		—			1.3			14.7			—			—			—			16.0
Transfers out of Level 3		—			(1.0	)		(1.6	)		(0.2	)		(12.1	)		—			(14.9	)
Balance as of June 30, 2019	$	4.1		$	534.6		$	145.9		$	-		$	959.7		$	0.5		$	1,644.8

(1) Includes partnership and non-marketable equity investments accounted for at fair value.

(2) There were no credit losses recorded in net earnings related to Level 3 assets still held as of June 30, 2020 and 2019.

10

With respect to changes in Level 3 liabilities during the first six months of 2020, the increase in senior notes and other debt primarily reflects the impact of Wilbert’s April 1, 2020 inclusion in Alleghany’s consolidated results, as discussed above.

Although Alleghany is responsible for the determination of the fair value of Alleghany’s financial assets and the supporting methodologies and assumptions, it employs third-party valuation service providers to gather, analyze and interpret market information and derive fair values based upon relevant methodologies and assumptions for individual instruments. When those providers are unable to obtain sufficient market observable information upon which to estimate the fair value for a particular security, fair value is determined either by requesting a quote, which is generally non-binding, from brokers who are knowledgeable about these securities or by employing widely accepted valuation models. As of June 30, 2020 and December 31, 2019, the fair value for the vast majority of debt securities included in Level 3 was provided by such third-party valuation service providers, and as such, valuation details on these securities are generally not available to Alleghany.

Alleghany employs specific control processes to determine the reasonableness of the fair values of its financial assets and liabilities. Alleghany’s processes are designed to ensure that the values received or internally estimated are accurately recorded and that the data inputs and the valuation techniques used are appropriate, consistently applied and that the assumptions are reasonable and consistent with the objective of determining fair value. Alleghany assesses the reasonableness of individual security values received from valuation service providers through various analytical techniques. In addition, Alleghany validates the reasonableness of fair values by comparing information obtained from Alleghany’s valuation service providers to other third-party valuation sources for selected securities. Alleghany also validates prices obtained from brokers for selected securities through reviews by those who have relevant expertise and who are independent of those charged with executing investing transactions. See Note 1(c) to Notes to Consolidated Financial Statements set forth in Part II, Item 8, “Financial Statements and Supplementary Data” of the 2019 Form 10-K for Alleghany’s accounting policy on fair value.

3. Investments

(a) Unrealized Gains and Losses

The following tables present the amortized cost and the fair value of AFS securities as of June 30, 2020 and December 31, 2019:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Allowance for Credit Losses(2)			Fair Value
	($ in millions)
As of June 30, 2020
Debt securities:
U.S. government obligations	$	1,102.2	$	53.8	$	(0.3	)	$	—		$	1,155.7
Municipal bonds		2,246.8		141.2		(1.8	)		—			2,386.2
Foreign government obligations		733.7		33.6		(0.5	)		—			766.8
U.S. corporate bonds		3,758.5		261.0		(9.5	)		(7.6	)		4,002.4
Foreign corporate bonds		1,252.5		42.5		(6.0	)		(0.9	)		1,288.1
Mortgage and asset-backed securities:
RMBS		2,063.7		82.7		(0.6	)		—			2,145.8
CMBS		862.5		33.8		(25.0	)		—			871.3
Other asset-backed securities(1)		2,375.6		37.8		(79.3	)		(0.4	)		2,333.7
Total debt securities		14,395.5		686.4		(123.0	)		(8.9	)		14,950.0
Short-term investments		1,119.7		—		—			—			1,119.7
Total investments	$	15,515.2	$	686.4	$	(123.0	)	$	(8.9	)	$	16,069.7

11

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	($ in millions)
As of December 31, 2019
Debt securities:
U.S. government obligations	$	1,198.5	$	19.3	$	(2.8	)	$	1,215.0
Municipal bonds		2,190.5		118.7		(1.3	)		2,307.9
Foreign government obligations		675.9		16.4		(1.6	)		690.7
U.S. corporate bonds		3,206.2		155.1		(2.3	)		3,359.0
Foreign corporate bonds		1,348.1		32.2		(2.9	)		1,377.4
Mortgage and asset-backed securities:
RMBS		1,785.1		56.1		(0.8	)		1,840.4
CMBS		849.9		23.2		(1.4	)		871.7
Other asset-backed securities(1)		2,544.5		24.8		(19.7	)		2,549.6
Total debt securities		13,798.7		445.8		(32.8	)		14,211.7
Short-term investments		914.8		—		—			914.8
Total investments	$	14,713.5	$	445.8	$	(32.8	)	$	15,126.5

(1) Includes $748.5 million and $834.2 million of collateralized loan obligations as of June 30, 2020 and December 31, 2019, respectively.

(2) See Note 1(c) of this Form 10-Q for further information regarding Alleghany’s adoption of new credit loss accounting guidance.

(b) Contractual Maturity

The following table presents the amortized cost and estimated fair value of debt securities by contractual maturity as of June 30, 2020. 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.

	Amortized Cost		Fair Value
	($ in millions)
As of June 30, 2020
Short-term investments due in one year or less	$	1,119.7	$	1,119.7
Mortgage and asset-backed securities(1)		5,301.8		5,350.8
Debt securities with maturity dates:
One year or less		423.1		427.2
Over one through five years		3,431.6		3,568.9
Over five through ten years		3,172.4		3,363.3
Over ten years		2,066.6		2,239.8
Total debt securities	$	14,395.5	$	14,950.0

(1) Mortgage and asset-backed securities by their nature do not generally have single maturity dates.

(c) Net Investment Income

The following table presents net investment income for the three and six months ended June 30, 2020 and 2019:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2020			2019			2020			2019
	($ in millions)
Interest income	$	109.2		$	127.2		$	228.5		$	246.5
Dividend income		5.2			9.4			15.2			19.2
Investment expenses		(7.2	)		(7.2	)		(14.4	)		(14.7	)
Partnerships and other investment results		11.5			13.3			1.4			14.8
Total	$	118.7		$	142.7		$	230.7		$	265.8

As of June 30, 2020, non-income producing invested assets were immaterial.

12

(d) Change in the Fair Value of Equity Securities

The following table presents changes in the fair value of equity securities for the three and six months ended June 30, 2020 and 2019:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2020		2019		2020			2019
	($ in millions)
Change in the fair value of equity securities sold during the period	$	50.7	$	11.8	$	(114.2	)	$	73.9
Change in the fair value of equity securities held at the end of the    period		191.5		131.9		(166.6	)		462.1
Change in the fair value of equity securities	$	242.2	$	143.7	$	(280.8	)	$	536.0

(e) Realized Gains and Losses

The proceeds from sales of debt and equity securities were $1.2 billion and $1.3 billion for the three months ended June 30, 2020 and 2019, respectively, and $3.8 billion and $3.8 billion for the six months ended June 30, 2020 and 2019, respectively.

Realized capital gains and losses for the three and six months ended June 30, 2020 and 2019 primarily reflect the sale of debt securities. For the three and six months ended June 30, 2020, realized capital gains and losses also include: (i) impairment charges of $44.5 million and $74.4 million, respectively, from write-downs of SORC oil field assets; and (ii) a gain of $16.3 million on April 1, 2020 in connection with Alleghany Capital’s acquisition of an additional approximately 55 percent of Wilbert that it did not previously own, and its pre-existing approximately 45 percent equity ownership was remeasured at estimated fair value (the “Wilbert Remeasurement Gain”).  SORC’s oil field assets are held for sale and consequently, were written down to estimated fair value, which reflects a significant decline in oil prices, less costs to sell.  For the six months ended June 30, 2020, realized capital gains and losses also include: (i) a $5.0 million realized gain from a reduction of certain contingent consideration liabilities at the PCT-level in connection with its acquisition of a provider of high-performance solid carbide end mills in June 2019; and (ii) a $7.1 million realized loss as a result of an early redemption of debt (see Note 11(a) of this Form 10-Q for further information on this early redemption).

The following table presents amounts of gross realized capital gains and gross realized capital losses for the three and six months ended June 30, 2020 and 2019:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2020			2019			2020			2019
	($ in millions)
Gross realized capital gains	$	28.5		$	13.6		$	87.4		$	25.7
Gross realized capital (losses)		(66.6	)		(1.2	)		(112.5	)		(8.9	)
Net realized capital gains	$	(38.1	)	$	12.4		$	(25.1	)	$	16.8

Gross realized capital losses exclude change in allowance for credit losses on AFS securities, as discussed below.

(f) Credit quality for AFS securities

Alleghany holds its debt securities as AFS and, as such, these securities are recorded at fair value. Credit losses for AFS securities are recorded through an allowance for credit losses. Changes in the allowance for credit losses are recorded for (or as a reversal of) credit losses on AFS securities.  Any portion of a decline in fair value related to a debt security that is believed to arise from factors other than credit is recorded as a component of other comprehensive income rather than charged against earnings.

Alleghany continually monitors the difference between amortized cost and the estimated fair value of its debt investments. The analysis of a security’s decline in value is performed in its functional currency.  Debt securities in an unrealized loss position are evaluated for credit losses if they meet any of the following criteria: (i) they are trading at a discount of at least 20 percent to amortized cost and have a credit rating below investment grade or are not rated; (ii) there has been a negative credit or news event with respect to the issuer that could indicate the existence of a credit loss; or (iii) Alleghany intends to sell, or it is more likely than not that Alleghany will sell, the debt security before recovery of its amortized cost basis.

If Alleghany intends to sell, or it is more likely than not that Alleghany will sell, a debt security before recovery of its amortized cost basis, the total amount of the unrealized loss position is recognized as a credit loss in earnings. To the extent that a debt security that is in an unrealized loss position is not impaired based on the preceding, Alleghany will consider a debt security to be impaired when it believes it to be probable that Alleghany will not be able to collect the entire amortized cost basis. For debt securities in an unrealized loss position as of the end of each quarter, Alleghany develops a best estimate of the present value of expected cash flows. If the results of the cash flow analysis indicate that Alleghany will not recover the full amount of its amortized cost basis in the debt security, Alleghany records a credit loss in earnings equal to the difference between the present value of expected cash flows and the amortized cost basis of the debt security. If applicable, the difference between the total unrealized loss position on the debt security and the total loss recognized in earnings is the non-credit related portion, which is recorded as a component of other comprehensive income.

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In developing the cash flow analyses for debt securities, Alleghany considers various factors for the different categories of debt securities. For municipal bonds, Alleghany takes into account the taxing power of the issuer, source of revenue, credit risk and enhancements and pre-refunding. For mortgage and asset-backed securities, Alleghany discounts its best estimate of future cash flows at an effective rate equal to the original effective yield of the security or, in the case of floating rate securities, at the current coupon. Alleghany’s models include assumptions about prepayment speeds, default and delinquency rates, underlying collateral (if any), credit ratings, credit enhancements and other observable market data. For corporate bonds, Alleghany reviews business prospects, credit ratings and available information from asset managers and rating agencies for individual securities.

Change in allowance for credit losses on AFS securities in the first six months of 2020 reflect $14.4 million of unrealized losses on debt securities, primarily related to the energy sector and lower-quality corporate bonds in other sectors due to a significant decline in their fair value relative to their amortized costs. The $14.4 million is net of a $17.0 million reduction of the allowance for credit losses on AFS securities in the second quarter of 2020, arising primarily from the improved bond market conditions and bond sales.

Change in allowance for credit losses on AFS securities in the first six months of 2019 reflect $10.0 million of unrealized losses on debt securities, primarily related to the energy sector and the deterioration of creditworthiness of the issuers. Of the $10.0 million of the change in allowance for credit losses on AFS securities, none were incurred in the second quarter of 2019.

The following table presents a rollforward of Alleghany’s allowance for credit losses on AFS securities for the three and six months ended June 30, 2020:

	Three Months Ended			Six Months Ended
	June 30, 2020			June 30, 2020
Allowance for Credit Losses	($ in millions)
Beginning balance	$	31.4		$	—
Beginning balance - cumulative effect of an accounting change(1)		—			—
Provision for credit losses		(17.0	)		14.4
Charge-offs		(5.5	)		(5.5	)
Recoveries		—			—
Balance as of June 30, 2020	$	8.9		$	8.9

(1) See Note 1(c) of this Form 10-Q for further information regarding Alleghany’s adoption of new credit loss accounting guidance.

The gross unrealized investment losses for debt securities as of June 30, 2020 were deemed to be temporary, based on, among other factors: (i) the relative magnitude to which the fair value of these investments had been below cost were not indicative of a credit loss; (ii) the absence of compelling evidence that would cause Alleghany to call into question the financial condition or near-term business prospects of the issuer of the security; and (iii) Alleghany’s ability and intent to hold the security for a period of time sufficient to allow for any anticipated recovery.

Alleghany’s methodology for assessing credit losses contains inherent risks and uncertainties which could include, but are not limited to, incorrect assumptions about financial condition, liquidity or future prospects, inadequacy of any underlying collateral and unfavorable changes in economic conditions or social trends, interest rates or credit ratings.

Alleghany’s consolidated investment portfolio consists mainly of highly rated and liquid debt and equity securities listed on national securities exchanges. The overall credit quality of the debt securities portfolio is measured using the lowest rating of three large, reputable rating agencies. In this regard, the overall weighted-average credit quality rating of Alleghany’s debt securities portfolio as of June 30, 2020 and December 31, 2019, was AA-. Although a portion of Alleghany’s debt securities, which consist predominantly of municipal bonds, is insured by third-party financial guaranty insurance companies, the impact of such insurance was not significant to the debt securities’ credit quality rating as of June 30, 2020.

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The following table presents the ratings of Alleghany’s debt securities as of June 30, 2020:

	Ratings as of June 30, 2020
	AAA / Aaa			AA / Aa			A			BBB / Baa			Below BBB / Baa or Not Rated(1)			Total
	($ in millions)
U.S. government obligations	$	—		$	1,155.7		$	—		$	—		$	—		$	1,155.7
Municipal bonds		226.7			1,603.5			485.2			69.8			1.0			2,386.2
Foreign government obligations		330.0			338.6			97.1			1.1			—			766.8
U.S. corporate bonds		40.7			365.9			1,847.6			1,413.1			335.1			4,002.4
Foreign corporate bonds		237.3			98.5			616.4			301.6			34.3			1,288.1
Mortgage and asset-backed securities:
RMBS		2.5			2,138.2			—			1.0			4.1			2,145.8
CMBS		287.6			412.5			170.9			0.3			—			871.3
Other asset-backed securities		926.1			574.0			466.9			272.8			93.9			2,333.7
Total debt securities	$	2,050.9		$	6,686.9		$	3,684.1		$	2,059.7		$	468.4		$	14,950.0
Percentage of debt securities		13.7	%		44.7	%		24.7	%		13.8	%		3.1	%		100.0	%

(1) Consists of $124.5 million of securities rated BB / Ba, $168.3 million of securities rated B, $20.1 million of securities rated CCC, $1.2 million of securities rated CC, $2.3 million of securities rated below CC and $152.0 million of not rated securities.

(g) Aging of Gross Unrealized Losses

The following tables present gross unrealized losses and related fair values for Alleghany’s AFS securities for which an allowance for credit losses has not been recorded, grouped by duration of time in a continuous unrealized loss position, as of June 30, 2020 and December 31, 2019:

	Less Than 12 Months				12 Months or More				Total
	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
	($ in millions)
As of June 30, 2020
Debt securities:
U.S. government obligations	$	110.7	$	0.3	$	—	$	—	$	110.7	$	0.3
Municipal bonds		95.2		1.8		—		—		95.2		1.8
Foreign government obligations		92.1		0.5		—		—		92.1		0.5
U.S. corporate bonds		373.6		9.2		4.2		0.3		377.8		9.5
Foreign corporate bonds		252.4		6.0		0.9		—		253.3		6.0
Mortgage and asset-backed securities:
RMBS		307.9		0.6		0.4		—		308.3		0.6
CMBS		332.3		25.0		0.2		—		332.5		25.0
Other asset-backed securities		684.7		46.2		520.3		33.1		1,205.0		79.3
Total temporarily impaired securities	$	2,248.9	$	89.6	$	526.0	$	33.4	$	2,774.9	$	123.0

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	Less Than 12 Months				12 Months or More				Total
	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
	($ in millions)
As of December 31, 2019
Debt securities:
U.S. government obligations	$	120.3	$	2.0	$	99.7	$	0.8	$	220.0	$	2.8
Municipal bonds		90.2		1.3		4.3		—		94.5		1.3
Foreign government obligations		198.5		1.2		33.8		0.4		232.3		1.6
U.S. corporate bonds		113.8		1.6		27.6		0.7		141.4		2.3
Foreign corporate bonds		212.0		2.3		66.9		0.6		278.9		2.9
Mortgage and asset-backed securities:
RMBS		48.7		0.3		48.6		0.5		97.3		0.8
CMBS		126.8		1.4		1.2		—		128.0		1.4
Other asset-backed securities		422.9		2.7		715.9		17.0		1,138.8		19.7
Total temporarily impaired securities	$	1,333.2	$	12.8	$	998.0	$	20.0	$	2,331.2	$	32.8

As of June 30, 2020, Alleghany held a total of 812 debt securities that were in an unrealized loss position, of which 116 securities were in an unrealized loss position continuously for 12 months or more. The unrealized losses associated with these debt securities consisted of losses related primarily to other asset-backed securities, U.S. corporate bonds and CMBS.  

(h) Investments in Variable Interest Entities

In December 2012, TransRe obtained an ownership interest in Pillar Capital Holdings Limited (“Pillar Holdings”), a Bermuda- based insurance asset manager focused on collateralized reinsurance and catastrophe insurance-linked securities. Additionally, TransRe invested $175.0 million and AIHL invested $25.0 million in limited partnership funds managed by Pillar Holdings (the “Funds”). The objective of the Funds is to create portfolios with attractive risk-reward characteristics and low correlation with other asset classes, using the extensive reinsurance and capital market experience of the principals of Pillar Holdings. Alleghany has concluded that both Pillar Holdings and the Funds (collectively, the “Pillar Investments”) represent variable interest entities and that Alleghany is not the primary beneficiary, as it does not have the ability to direct the activities that most significantly impact each entity’s economic performance. Therefore, the Pillar Investments are not consolidated and are accounted for under the equity method of accounting. Alleghany’s potential maximum loss in the Pillar Investments is limited to its cumulative net investment. As of June 30, 2020 and December 31, 2019, Alleghany’s carrying value in the Pillar Investments, as determined under the equity method of accounting, was $162.9 million and $205.5 million, respectively, which is reported as a component of other invested assets and is net of returns of capital received from the Pillar Investments.

See Note 9(c) of this Form 10-Q for further information regarding variable interest entities.

(i) Investments in Commercial Mortgage Loans

As of June 30, 2020 and December 31, 2019, the carrying value of Alleghany’s commercial mortgage loan portfolio was $685.4 million and $686.2 million, respectively, representing the unpaid principal balance on the loans, less allowance for credit losses. The estimated fair value of the commercial mortgage loan portfolio approximated carrying value as of June 30, 2020 and December 31, 2019. The commercial mortgage loan portfolio consists primarily of first mortgages on commercial properties in major metropolitan areas in the U.S. The loans earn interest at fixed- and floating-rates, and mature in two to ten years from loan origination. As of June 30, 2020, the vast majority of loans in Alleghany’s portfolio were originated in the 2016 through 2019 years.

The principal amounts of the loans were no more than approximately two-thirds of the property’s appraised value at the time the loans were made and the estimated fair value of underlying collateral was approximately double that of the commercial mortgage loan portfolio carrying value as of June 30, 2020.  Fair value estimates of underlying collateral are updated on a rolling basis annually, with a portion of the portfolio updated each quarter. As of June 30, 2020, there was no loan in default or in arrears.

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The following table presents a rollforward of Alleghany’s allowance for credit losses on commercial mortgage loans for the three and six months ended June 30, 2020:

	Three Months Ended			Six Months Ended
	June 30, 2020			June 30, 2020
Allowance for Credit Losses	($ in millions)
Beginning balance	$	2.0		$	—
Beginning balance - cumulative effect of an accounting change(1)		—			0.8
Provision for credit losses		(0.7	)		0.5
Charge-offs		—			—
Recoveries		—			—
Balance as of June 30, 2020	$	1.3		$	1.3

(1) See Note 1(c) of this Form 10-Q for further information regarding Alleghany’s adoption of new credit loss accounting guidance.

4. Reinsurance Ceded

(a) Overview

Alleghany’s reinsurance and insurance subsidiaries reinsure portions of the risks they underwrite in order to reduce the effect of individual or aggregate exposure to losses, manage capacity, protect capital resources, reduce volatility in specific lines of business, improve risk-adjusted portfolio returns and enable them to increase gross premium writings and risk capacity without requiring additional capital. Alleghany’s reinsurance and insurance subsidiaries generally purchase reinsurance and retrocessional coverages from highly- rated third-party reinsurers or on a collateralized basis. If the assuming reinsurers are unable or unwilling to meet the obligations assumed under the applicable reinsurance agreements, Alleghany’s reinsurance and insurance subsidiaries would remain liable for such reinsurance portion not paid by these reinsurers. As such, funds, trust agreements and letters of credit are held to collateralize a portion of Alleghany’s reinsurance recoverables and Alleghany’s reinsurance and insurance subsidiaries reinsure portions of the risks they underwrite or assume with multiple reinsurance programs. A summary of the more significant programs follows.

TransRe enters into various retrocession arrangements, including property catastrophe retrocession contracts, to manage the effects of individual or aggregate exposure to losses, reduce volatility in specific lines of business, improve risk-adjusted portfolio returns, strengthen its market position and enhance capital efficiency. These include excess-of-loss and quota share treaties in traditional rated form as well as catastrophe bonds and other collateralized insurance-linked structures. TransRe’s retrocession protections generally have a one-year term and renewal dates occur throughout the year, with the majority renewing at January 1 and June 1. The catastrophe bonds, however, have a four-year term, with maturities in 2022 and 2023.

RSUI reinsures its property lines of business through a program consisting of surplus share treaties, facultative placements, and per risk and catastrophe excess of loss treaties. RSUI’s catastrophe reinsurance program and property per risk reinsurance program each run on an annual basis from May 1 to the following April 30 and portions expired on April 30, 2020. Both programs were renewed on May 1, 2020 with substantially similar terms as the expired programs.

(b) Reinsurance Recoverables

Amounts recoverable from reinsurers are recognized in a manner consistent with the loss and loss adjustment expense (“LAE”) liabilities associated with the reinsurance placement and presented on the balance sheet as reinsurance recoverables, and are recorded after an allowance for credit losses. Reinsurance recoverable balances as of June 30, 2020 and December 31, 2019 are presented in the table below:

	As of June 30,			As of December 31,
	2020			2019
	($ in millions)
Reinsurance recoverables on paid losses	$	76.1		$	98.1
Ceded outstanding loss and LAE		1,470.5			1,583.9
Reinsurance recoverables, before allowance for credit losses		1,546.6			1,682.0
Allowance for credit losses		(6.9	)		—
Total	$	1,539.7		$	1,682.0

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The following table presents information regarding concentration of Alleghany’s reinsurance recoverables and the ratings profile of our reinsurers as of June 30, 2020:

Reinsurer(1)	Rating(2)	Amount			Percentage
	($ in millions)
Syndicates at Lloyd's of London	A (Excellent)	$	128.2			8.3	%
Kane SAC Ltd, Rondout Segregated Account(3)	not rated		106.0			6.9	%
PartnerRe Ltd	A (Excellent)		94.4			6.1	%
Fairfax Financial Holdings Ltd	A (Superior)		91.7			5.9	%
Swiss Reinsurance Company	A+ (Superior)		90.5			5.9	%
Third Point Reinsurance Group	A- (Excellent)		82.8			5.4	%
RenaissanceRe Holdings Ltd	A+ (Superior)		75.2			4.9	%
W.R. Berkley Corporation	A+ (Superior)		69.2			4.5	%
Kane SAC Ltd, Bowery Segregated Account(3)	not rated		60.4			3.9	%
Chubb	A+ (Superior)		57.2			3.7	%
All other reinsurers			691.0			44.5	%
Total reinsurance recoverables, before allowance for credit losses(4)		$	1,546.6			100.0	%
Allowance for credit losses			(6.9	)
Total		$	1,539.7
Secured reinsurance recoverables(3)		$	570.8			36.9	%

(1) Reinsurance recoverables reflect amounts due from one or more reinsurance subsidiaries of the listed company.

(2) Represents the A.M. Best Company, Inc. financial strength rating for the applicable reinsurance subsidiary or subsidiaries from which the reinsurance recoverable is due.

(3) Represents reinsurance recoverables secured by funds held, trust agreements or letters of credit.

(4) Approximately 70 percent of our reinsurance recoverables balance as of June 30, 2020 was due from reinsurers having an A.M. Best Company, Inc. financial strength rating of A (Excellent) or higher, with a majority of the other reinsurance recoverables being secured by funds held, trust agreements or letters of credit.

The following table presents a rollforward of Alleghany’s allowance for credit losses on reinsurance recoverables for the three and six months ended June 30, 2020:

	Three Months Ended		Six Months Ended
	June 30, 2020		June 30, 2020
Allowance for Credit Losses	($ in millions)
Beginning balance	$	6.8	$	—
Beginning balance - cumulative effect of an accounting change(1)		—		3.3
Provision for credit losses(2)		0.1		3.6
Charge-offs		—		—
Recoveries		—		—
Balance as of June 30, 2020	$	6.9	$	6.9

(1) See Note 1(c) of this Form 10-Q for further information regarding Alleghany’s adoption of new credit loss accounting guidance.

(2) For the six months ended June 30, 2020, primarily reflects the change in estimates of expected credit losses based on current conditions and reasonable and supportable forecasts, including estimates from the Pandemic, as defined in Note 9(a) of this Form 10-Q.

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5. Liability for Loss and LAE

(a) Liability Rollforward

The following table presents the activity in the liability for loss and LAE for the six months ended June 30, 2020 and 2019:

	Six Months Ended
	June 30,
	2020			2019
	($ in millions)
Reserves as of January 1	$	11,928.4		$	12,250.3
Less: reinsurance recoverables(1)		1,583.9			1,857.4
Net reserves as of January 1		10,344.5			10,392.9
Other adjustments		(2.3	)		(1.4	)
Incurred loss and LAE, net of reinsurance, related to:
Current year		2,145.5			1,683.3
Prior years		(93.7	)		(94.0	)
Total incurred loss and LAE, net of reinsurance		2,051.8			1,589.3
Paid loss and LAE, net of reinsurance, related to:(2)
Current year		271.0			248.0
Prior years		1,523.7			1,651.5
Total paid loss and LAE, net of reinsurance		1,794.7			1,899.5
Foreign currency exchange rate effect		(18.5	)		(6.6	)
Net reserves as of June 30		10,580.8			10,074.7
Reinsurance recoverables as of June 30(1)		1,470.5			1,557.1
Reserves as of June 30	$	12,051.3		$	11,631.8

(1) Reinsurance recoverables in this table include only ceded loss and LAE reserves.

(2) Includes paid losses, net of reinsurance, related to commutations.

Gross loss and LAE reserves as of June 30, 2020 increased from December 31, 2019, primarily reflecting the impact of growing net premiums earned and catastrophe losses incurred in the first six months of 2020, partially offset by payments on catastrophe losses incurred primarily in 2017, 2018 and 2019 and favorable prior accident year loss reserve development.  

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(b) Liability Development

The following table presents the (favorable) unfavorable prior accident year loss reserve development for the three and six months ended June 30, 2020 and 2019:

	Three Months Ended								Six Months Ended
	June 30,								June 30,
	2020				2019				2020				2019
	($ in millions)
Reinsurance Segment
Property:
Catastrophe events	$	0.5			$	(9.9	)	(1)	$	(31.9	)	(2)	$	(1.5	)	(3)
Non-catastrophe		(13.5	)	(4)		(6.3	)	(5)		(27.8	)	(4)		(25.4	)	(6)
Total		(13.0	)			(16.2	)			(59.7	)			(26.9	)
Casualty & other:
Malpractice Treaties(7)		—				(1.4	)			-				(1.4	)
Catastrophe events		(3.8	)			0.7				(2.4	)			(0.5	)
Other		(34.4	)	(8)		(27.9	)	(9)		(46.8	)	(10)		(52.4	)	(11)
Total		(38.2	)			(28.6	)			(49.2	)			(54.3	)
Total Reinsurance Segment		(51.2	)			(44.8	)			(108.9	)			(81.2	)
Insurance Segment
RSUI:
Casualty		16.5		(12)		(12.1	)	(13)		15.5		(12)		(17.7	)	(13)
Property and other		—				(0.4	)			(0.5	)			1.5		(14)
Total		16.5				(12.5	)			15.0				(16.2	)
CapSpecialty		—				0.7				0.2				3.4		(15)
Total incurred related to prior years	$	(34.7	)		$	(56.6	)		$	(93.7	)		$	(94.0	)

(1) Primarily reflects favorable prior accident year loss reserve development related to wildfires in California in the 2018 accident year.

(2) Primarily reflects favorable prior accident year loss reserve development related to Typhoon Hagibis in the 2019 accident year and, to a lesser extent, catastrophic events in the 2018 accident year.

(3) Primarily reflects favorable prior accident year loss reserve development related to wildfires in California in the 2018 accident year, partially offset by unfavorable prior accident year loss reserve development related to Typhoon Jebi in the 2018 accident year.

(4) Primarily reflects favorable prior accident year loss reserve development in the 2017 and 2019 accident years.

(5) Primarily reflects favorable prior accident year loss reserve development in the 2018 accident year.

(6) Primarily reflects favorable prior accident year loss reserve development in the 2016 and 2018 accident years.

(7) Represents certain malpractice treaties pursuant to which the increased underwriting profits created by the favorable prior accident year loss reserve development are largely retained by the cedants. As a result, the favorable prior accident year loss reserve development is largely offset by an increase in profit commission expense incurred when such favorable prior accident year loss reserve development occurs.

(8) Primarily reflects favorable prior accident year loss reserve development in the longer-tailed lines of business in the 2016 and earlier accident years and in the shorter-tailed lines of business in the 2017 accident year, partially offset by unfavorable prior accident year development in the shorter-tailed lines of business in the 2018 and 2019 accident years.

(9) Primarily reflects favorable prior accident year loss reserve development in the longer-tailed lines of business in the 2013 and prior accident years.

(10) Primarily reflects favorable prior accident year loss reserve development in the longer-tailed lines of business in the 2013 and earlier accident years and in the shorter-tailed lines of business in the 2017 accident year, partially offset by unfavorable prior accident year development in the shorter-tailed lines of business in the 2014 through 2016, 2018 and 2019 accident years.

(11) Primarily reflects favorable prior accident year loss reserve development in the longer-tailed lines of business in the 2013 and prior accident years and in the shorter-tailed lines of business in the 2012 through 2014 accident years.

(12) Primarily reflects unfavorable prior accident year loss reserve development in the professional liability lines of business in the 2017 through 2019 accident years, partially offset by favorable prior accident year loss reserve development in the directors’ and officers’ liability and umbrella/excess lines of business in the 2011 through 2015 accident years.

(13) Primarily reflects favorable prior accident year loss reserve development in the directors’ and officers’ liability and umbrella/excess lines of business in the 2011 through 2015 accident years, partially offset by unfavorable prior accident year loss reserve development in the professional liability lines of business in recent accident years.

(14) Primarily reflects unfavorable prior accident year loss reserve development related to the assumed property reinsurance lines of business from catastrophe losses in recent accident years, partially offset by favorable prior accident year loss reserve development related to Superstorm Sandy in the 2012 accident year and by Hurricane Harvey in the 2017 accident year.

(15) Primarily reflects unfavorable prior accident year loss reserve development in certain specialty lines of business written through a program administrator in connection with a terminated program in the 2009 and 2010 accident years.

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6. Income Taxes

The Coronavirus Aid, Relief and Economic Security Act (the “CARES Act”) was signed into law on March 27, 2020.  Among other provisions, the CARES Act delayed certain employer payroll tax remittance deadlines and created or expanded certain income tax credits and loss carryback provisions and, as a result, Alleghany initially recorded a $6.9 million tax benefit that was subsequently reversed as of June 30, 2020 due to a change in Alleghany’s taxable earnings.

The effective tax rate on earnings before income taxes for the first six months of 2020 was 21.7 percent compared with 19.3 percent for the first six months of 2019. The effective tax rate in the first six months of 2020 was calculated based on actual results through June 30, 2020 because management was not able to reliably estimate the annual effective tax rate in light of the significant losses incurred.  The increase in the effective tax rate in the first six months of 2020 from the first six months of 2019 primarily reflects higher foreign and state taxes and lower tax-exempt interest income and dividends-received deductions.

Alleghany believes that, as of June 30, 2020, it had no material uncertain tax positions. Interest and penalties related to unrecognized tax expenses (benefits) are recognized in income tax expense, when applicable. There were no material liabilities for interest or penalties accrued as of June 30, 2020.

7. Stockholders’ Equity

(a) Common Stock Repurchases

In June 2018, the Alleghany Board of Directors authorized the repurchase of shares of common stock of Alleghany, par value $1.00 per share (“Common Stock”), at such times and at prices as management determines to be advisable, up to an aggregate of $400.0 million. In September 2019, the Alleghany Board of Directors authorized, upon the completion of the program authorized in 2018, the repurchase of additional shares of Common Stock, at such times and at prices as management determines to be advisable, up to an aggregate of $500.0 million.  As of June 30, 2020, Alleghany had $582.9 million remaining under its share repurchase authorizations.

The following table presents the shares of Common Stock that Alleghany repurchased in the three and six months ended June 30, 2020 and 2019:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2020		2019		2020		2019
Shares repurchased		—		19,246		62,540		148,813
Cost of shares repurchased (in millions)	$	—	$	12.7	$	44.3	$	93.2
Average price per share repurchased	$	—	$	658.09	$	707.84	$	625.96

(b) Accumulated Other Comprehensive Income (Loss)

The following tables present a reconciliation of the changes during the six months ended June 30, 2020 and 2019 in accumulated other comprehensive income (loss) attributable to Alleghany stockholders:

	Unrealized Appreciation of Investments			Unrealized Currency Translation Adjustment			Retirement Plans			Total
	($ in millions)
Balance as of January 1, 2020	$	321.0		$	(121.8	)	$	(27.9	)	$	171.3
Other comprehensive income (loss), net of tax:
Other comprehensive income (loss) before reclassifications		135.1			1.1			0.9			137.1
Reclassifications from accumulated other comprehensive income		(16.4	)		—			—			(16.4	)
Total		118.7			1.1			0.9			120.7
Balance as of June 30, 2020	$	439.7		$	(120.7	)	$	(27.0	)	$	292.0

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	Unrealized Appreciation of Investments			Unrealized Currency Translation Adjustment			Retirement Plans			Total
	($ in millions)
Balance as of January 1, 2019	$	(61.6	)	$	(124.7	)	$	(15.7	)	$	(202.0	)
Other comprehensive income (loss), net of tax:
Other comprehensive income (loss) before reclassifications		356.0			2.3			1.1			359.4
Reclassifications from accumulated other comprehensive income		(5.4	)		—			—			(5.4	)
Total		350.6			2.3			1.1			354.0
Balance as of June 30, 2019	$	289.0		$	(122.4	)	$	(14.6	)	$	152.0

The following table presents reclassifications out of accumulated other comprehensive income (loss) attributable to Alleghany stockholders during the three and six months ended June 30, 2020 and 2019:

		Three Months Ended						Six Months Ended
Accumulated Other		June 30,						June 30,
Comprehensive Income Component	Line in Consolidated Statement of Earnings	2020			2019			2020			2019
		($ in millions)
Unrealized appreciation of investments:	Net realized capital gains(1)	$	9.9		$	(12.4	)	$	(35.2	)	$	(16.8	)
	Change in allowance for credit losses on available for sale securities		(17.0	)		—			14.4			10.0
	Income taxes		1.5			2.6			4.4			1.4
Total reclassifications:	Net (earnings)	$	(5.6	)	$	(9.8	)	$	(16.4	)	$	(5.4	)

(1) For the three months ended June 30, 2020, excludes the $16.3 million Wilbert Remeasurement Gain, and $44.5 million impairment charge from a write-down of SORC oil field assets.  For the six months ended June 30, 2020, excludes the $16.3 million Wilbert Remeasurement Gain, a $7.1 million realized loss as a result of an early redemption of debt, a $74.4 million impairment charge from a write-down of SORC oil field assets and a $5.0 million realized gain from a reduction of certain contingent consideration liabilities.  See Note 3(e) of this Form 10-Q for additional information.

(c) Special Dividend

In February 2020, the Alleghany Board of Directors declared a special dividend of $15.00 per share for stockholders of record on March 5, 2020. On March 15, 2020, Alleghany paid dividends to stockholders totaling $215.0 million.

8. Earnings Per Share of Common Stock

The following table presents a reconciliation of the earnings and share data used in the basic and diluted earnings per share computations for the three and six months ended June 30, 2020 and 2019:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2020		2019		2020			2019
	($ in millions, except share amounts)
Net earnings (losses) available to Alleghany stockholders	$	177.4	$	295.5	$	(183.8	)	$	735.7
Effect of dilutive securities		—		—		(8.4	)		—
Income available to common stockholders for diluted earnings per share	$	177.4	$	295.5	$	(192.2	)	$	735.7
Weighted average common shares outstanding applicable to basic earnings per share		14,310,874		14,439,545		14,325,772			14,460,400
Effect of dilutive securities		—		—		35,797			14,960
Adjusted weighted average common shares outstanding applicable to diluted earnings per share		14,310,874		14,439,545		14,361,569			14,475,360
Contingently issuable shares(1)						16,758			46,973

(1) Contingently issuable shares were potentially available in the periods presented, but were not included in the diluted earnings per share computations because the impact was anti-dilutive to the earnings per share calculation.

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9. Commitments and Contingencies

(a) General

The ongoing COVID-19 global pandemic (the “Pandemic”) has significantly disrupted many aspects of society as well as financial markets, and has caused widespread global economic dislocation. Alleghany cannot reasonably estimate the duration or severity of the Pandemic, or the extent to which the related disruption may adversely impact its results of operations, financial position and cash flows, or those of its subsidiaries. Adverse impacts from the Pandemic in future periods may include realized and unrealized losses in Alleghany’s investment portfolio and receivables, increased underwriting losses at our reinsurance and insurance segments, and impairment losses on certain subsidiary goodwill and intangible assets.

Certain of Alleghany’s subsidiaries are parties to pending litigation and claims in connection with the ordinary course of their businesses. Each such subsidiary makes provisions for estimated losses to be incurred in such litigation and claims, including legal costs. In the opinion of management, such provisions are adequate, and management does not believe that any pending litigation will have a material adverse effect on Alleghany’s consolidated results of operations, financial position or cash flows.

(b) Leases

Alleghany and its subsidiaries lease certain facilities, land, furniture and equipment under long-term, non-cancelable lease agreements that expire at various dates in future years. Most of Alleghany’s leases relate to office facilities. Alleghany’s lease agreements do not contain any material restrictive covenants and substantially all are considered to be operating leases. Additional information about leases can be found in Note 12(b) to Notes to Consolidated Financial Statements set forth in Part II, Item 8, “Financial Statements and Supplementary Data” of the 2019 Form 10-K.

(c) Hotel Development Commitments

During the first six months of 2020, Alleghany Capital invested $0.8 million in certain hotel development projects.  The projects are conducted through certain limited liability entities, which are variable interest entities, to which Alleghany is not the primary beneficiary.  As of June 30, 2020, Alleghany guaranteed up to $5.6 million of debt of these entities to certain third party lenders, for which Alleghany receives a fee.

10. Segments of Business

(a) Overview

Alleghany’s segments are reported in a manner consistent with the way management evaluates the businesses. As such, Alleghany classifies its businesses into three reportable segments – reinsurance, insurance and Alleghany Capital.

Reinsurance and insurance underwriting activities are evaluated separately from investment and other activities. Segment accounting policies are described in Note 1 to Notes to Consolidated Financial Statements set forth in Part II, Item 8, “Financial Statements and Supplementary Data” of the 2019 Form 10-K.

The reinsurance segment consists of property and casualty reinsurance operations conducted by TransRe’s reinsurance operating subsidiaries and is further reported through two major product lines – property and casualty & other. TransRe provides property and casualty reinsurance to insurers and other reinsurers through brokers and on a direct basis to ceding companies. TransRe writes a modest amount of property and casualty insurance business, which is included in the reinsurance segment. A significant portion of the premiums earned by TransRe’s operations are generated by offices located in Canada, Europe, Asia, Australia, Africa and those serving Latin America and the Caribbean. Although the majority of the premiums earned by these offices typically relate to the regions where they are located, a significant portion may be derived from other regions of the world, including the U.S. In addition, although a significant portion of the assets and liabilities of these foreign offices generally relate to the countries where the ceding companies and reinsurers are located, most investments are located in the country of domicile of these offices.

The insurance segment consists of property and casualty insurance operations conducted in the U.S. by AIHL through its insurance operating subsidiaries RSUI and CapSpecialty. RSUI also writes a modest amount of assumed reinsurance business, which is included in the insurance segment.

The Alleghany Capital segment consists of industrial operations, non-industrial operations and corporate operations at the Alleghany Capital level, which include certain hotel development projects. Industrial operations are conducted through PCT, Kentucky Trailer, W&W|AFCO Steel and, starting April 1, 2020, Wilbert. Non-industrial operations are conducted through IPS, Jazwares and Concord.

On April 1, 2020, Alleghany Capital acquired an additional approximately 55 percent of Wilbert it previously did not own, bringing its equity interest in Wilbert to approximately 100 percent, for $121.3 million, consisting of $46.3 million in cash and $75.0 million of incremental debt. In connection with the acquisition, Alleghany recorded $62.9 million of goodwill, $21.5 million of finite-lived customer relationship intangible assets, $14.9 million of finite-lived license agreements intangible assets and $26.2 million of indefinite-lived trade name intangible assets. The acquisition-date consideration transferred and purchase price allocation to the acquired assets and liabilities of Wilbert were based on estimated fair values that have not been finalized. As a result, the fair value

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recorded for these items is a provisional estimate and may be subject to adjustment. Once completed, any adjustment resulting from the valuations may impact the individual amounts recorded for assets acquired and liabilities assumed, as well as the residual goodwill. The acquisition accounting for Wilbert is expected to be finalized later in 2020.  In connection with the acquisition accounting, Alleghany Capital recorded the Wilbert Remeasurement Gain. See Note 3(e) of this Form 10-Q for information on the Wilbert Remeasurement Gain.

Corporate activities are not classified as a segment. The primary components of corporate activities are Alleghany Properties, SORC and activities at the Alleghany parent company. Corporate activities also include the elimination of minor activity between segments.

In addition, corporate activities include interest expense associated with the senior notes issued by Alleghany, whereas interest expense associated with senior notes issued by TransRe is included in “Total Segments” and interest expense associated with other debt is included in Alleghany Capital. Information related to the senior notes and other debt can be found in Note 11 of this Form 10-Q.

(b) Results

The following tables present segment results for Alleghany’s three reportable segments and for corporate activities for the three and six months ended June 30, 2020 and 2019:

		Reinsurance Segment								Insurance Segment
Three Months Ended June 30, 2020		Property			Casualty & other (1)		Total			RSUI			Cap Specialty			Total			Subtotal			Alleghany Capital		Total Segments			Corporate Activities			Consolidated
	($ in millions)
Gross premiums written		$	413.3		$	740.6	$	1,153.9		$	474.7		$	101.2		$	575.9		$	1,729.8		$	—	$	1,729.8		$	(8.6	)	$	1,721.2
Net premiums written			355.8			730.7		1,086.5			300.0			91.5			391.5			1,478.0			—		1,478.0			—			1,478.0
Net premiums earned			328.7			742.3		1,071.0			241.5			82.4			323.9			1,394.9			—		1,394.9			—			1,394.9
Net loss and LAE			273.4			504.8		778.2			196.0			50.2			246.2			1,024.4			—		1,024.4			—			1,024.4
Commissions, brokerage and other    underwriting expenses			96.8			226.3		323.1			52.7			34.2			86.9			410.0			—		410.0			—			410.0
Underwriting (loss) profit(2)		$	(41.5	)	$	11.2	$	(30.3	)	$	(7.2	)	$	(2.0	)	$	(9.2	)		(39.5	)		—		(39.5	)		—			(39.5	)
Net investment income																				115.4			—		115.4			3.3			118.7
Change in the fair value of equity securities																				242.2			—		242.2			—			242.2
Net realized capital gains																				(10.1	)		16.4		6.3			(44.4	)		(38.1	)
Change in allowance for credit losses on available for sale securities																				16.6			—		16.6			0.4			17.0
Noninsurance revenue																				8.3			483.2		491.5			1.2			492.7
Other operating expenses																				33.3			473.6		506.9			3.4			510.3
Corporate administration																				0.5			—		0.5			18.1			18.6
Amortization of intangible assets																				0.2			11.9		12.1			—			12.1
Interest expense																				6.8			4.3		11.1			11.1			22.2
Earnings (losses) before income taxes																			$	292.1		$	9.8	$	301.9		$	(72.1	)	$	229.8

		Reinsurance Segment						Insurance Segment
Three Months Ended June 30, 2019		Property		Casualty & other (1)		Total		RSUI		Cap Specialty		Total		Subtotal		Alleghany Capital		Total Segments		Corporate Activities			Consolidated
	($ in millions)
Gross premiums written		$	381.6	$	829.1	$	1,210.7	$	372.4	$	93.8	$	466.2	$	1,676.9	$	—	$	1,676.9	$	(6.1	)	$	1,670.8
Net premiums written			305.9		807.0		1,112.9		246.9		86.7		333.6		1,446.5		—		1,446.5		—			1,446.5
Net premiums earned			303.2		771.7		1,074.9		202.4		78.7		281.1		1,356.0		—		1,356.0		—			1,356.0
Net loss and LAE			136.2		508.9		645.1		105.6		46.1		151.7		796.8		—		796.8		—			796.8
Commissions, brokerage and other    underwriting expenses			103.8		250.1		353.9		57.9		32.5		90.4		444.3		—		444.3		—			444.3
Underwriting profit(2)		$	63.2	$	12.7	$	75.9	$	38.9	$	0.1	$	39.0		114.9		—		114.9		—			114.9
Net investment income															138.3		0.9		139.2		3.5			142.7
Change in the fair value of equity securities															143.3		—		143.3		0.4			143.7
Net realized capital gains															12.2		0.2		12.4		—			12.4
Change in allowance for credit losses on available for sale securities															—		—		—		—			—
Noninsurance revenue															6.6		593.7		600.3		3.6			603.9
Other operating expenses															26.2		548.3		574.5		7.0			581.5
Corporate administration															1.8		—		1.8		24.2			26.0
Amortization of intangible assets															0.4		8.4		8.8		—			8.8
Interest expense															6.8		4.7		11.5		13.6			25.1
Earnings (losses) before income taxes														$	380.1	$	33.4	$	413.5	$	(37.3	)	$	376.2

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		Reinsurance Segment									Insurance Segment
Six Months Ended June 30, 2020		Property			Casualty & other (1)			Total			RSUI		Cap Specialty			Total		Subtotal			Alleghany Capital		Total Segments			Corporate Activities			Consolidated
	($ in millions)
Gross premiums written		$	825.9		$	1,655.5		$	2,481.4		$	840.6	$	186.7		$	1,027.3	$	3,508.7		$	—	$	3,508.7		$	(16.9	)	$	3,491.8
Net premiums written			668.7			1,628.8			2,297.5			544.5		169.7			714.2		3,011.7			—		3,011.7			—			3,011.7
Net premiums earned			650.1			1,554.0			2,204.1			470.9		164.3			635.2		2,839.3			—		2,839.3			—			2,839.3
Net loss and LAE			521.3			1,119.1			1,640.4			311.9		99.5			411.4		2,051.8			—		2,051.8			—			2,051.8
Commissions, brokerage and other    underwriting expenses			202.2			470.7			672.9			110.6		67.9			178.5		851.4			—		851.4			—			851.4
Underwriting (loss) profit(2)		$	(73.4	)	$	(35.8	)	$	(109.2	)	$	48.4	$	(3.1	)	$	45.3		(63.9	)		—		(63.9	)		—			(63.9	)
Net investment income																			225.0			1.8		226.8			3.9			230.7
Change in the fair value of equity securities																			(279.4	)		—		(279.4	)		(1.4	)		(280.8	)
Net realized capital gains																			35.1			21.4		56.5			(81.6	)		(25.1	)
Change in allowance for credit losses on available for sale securities																			(14.1	)		—		(14.1	)		(0.3	)		(14.4	)
Noninsurance revenue																			15.6			940.5		956.1			4.5			960.6
Other operating expenses																			43.1			924.3		967.4			9.6			977.0
Corporate administration																			(1.6	)		—		(1.6	)		5.8			4.2
Amortization of intangible assets																			0.5			21.2		21.7			—			21.7
Interest expense																			13.5			8.1		21.6			19.0			40.6
Earnings (losses) before income taxes																		$	(137.2	)	$	10.1	$	(127.1	)	$	(109.3	)	$	(236.4	)

		Reinsurance Segment						Insurance Segment
Six Months Ended June 30, 2019		Property		Casualty & other (1)		Total		RSUI		Cap Specialty		Total		Subtotal			Alleghany Capital		Total Segments			Corporate Activities			Consolidated
	($ in millions)
Gross premiums written		$	796.7	$	1,645.6	$	2,442.3	$	671.4	$	176.6	$	848.0	$	3,290.3		$	—	$	3,290.3		$	(12.9	)	$	3,277.4
Net premiums written			622.1		1,598.4		2,220.5		448.3		163.3		611.6		2,832.1			—		2,832.1			—			2,832.1
Net premiums earned			612.1		1,492.0		2,104.1		394.8		154.4		549.2		2,653.3			—		2,653.3			—			2,653.3
Net loss and LAE			298.8		999.5		1,298.3		199.9		91.1		291.0		1,589.3			—		1,589.3			—			1,589.3
Commissions, brokerage and other    underwriting expenses			207.5		482.4		689.9		111.4		63.1		174.5		864.4			—		864.4			—			864.4
Underwriting profit(2)		$	105.8	$	10.1	$	115.9	$	83.5	$	0.2	$	83.7		199.6			—		199.6			—			199.6
Net investment income															256.3			2.2		258.5			7.3			265.8
Change in the fair value of equity securities															532.4			—		532.4			3.6			536.0
Net realized capital gains															16.2			0.6		16.8			—			16.8
Change in allowance for credit losses on available for sale securities															(10.0	)		—		(10.0	)		—			(10.0	)
Noninsurance revenue															12.0			1,098.7		1,110.7			7.3			1,118.0
Other operating expenses															55.8			1,013.8		1,069.6			14.3			1,083.9
Corporate administration															2.8			—		2.8			42.5			45.3
Amortization of intangible assets															0.6			15.1		15.7			—			15.7
Interest expense															13.6			9.0		22.6			26.1			48.7
Earnings (losses) before income taxes														$	933.7		$	63.6	$	997.3		$	(64.7	)	$	932.6

(1) Primarily consists of the following reinsurance lines of business: directors’ and officers’ liability; errors and omissions liability; general liability; medical malpractice; ocean marine and aviation; auto liability; accident and health; mortgage reinsurance; surety; and credit.

(2) Underwriting profit represents net premiums earned less net loss and LAE and commissions, brokerage and other underwriting expenses, all as determined in accordance with GAAP, and does not include net investment income, change in the fair value of equity securities, net realized capital gains, change in allowance for credit losses on available for sale securities, noninsurance revenue, other operating expenses, corporate administration, amortization of intangible assets or interest expense. Underwriting profit does not replace earnings before income taxes determined in accordance with GAAP as a measure of profitability. Rather, Alleghany believes that underwriting profit enhances the understanding of its reinsurance and insurance segments’ operating results by highlighting net earnings attributable to their underwriting performance. Earnings before income taxes (a GAAP measure) may show a profit despite an underlying underwriting loss. Where underwriting losses persist over extended periods, a reinsurance or an insurance company’s ability to continue as an ongoing concern may be at risk. Therefore, Alleghany views underwriting profit as an important measure in the overall evaluation of performance.

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(c) Identifiable Assets and Equity

The following table presents identifiable assets, the portion of identifiable assets related to cash and invested assets and equity attributable to Alleghany for Alleghany’s reportable segments and for corporate activities as of June 30, 2020:

	Identifiable Assets		Invested Assets and Cash		Equity Attributable to Alleghany
	($ in millions)
Reinsurance segment	$	17,356.0	$	13,990.7	$	5,154.2
Insurance segment		7,072.2		5,324.3		2,572.5
Subtotal		24,428.2		19,315.0		7,726.7
Alleghany Capital		2,273.0		72.5		1,013.2
Total segments		26,701.2		19,387.5		8,739.9
Corporate activities		919.7		874.7		(283.7	)
Consolidated	$	27,620.9	$	20,262.2	$	8,456.2

(d) Alleghany Capital Noninsurance Revenue

For Alleghany Capital’s industrial and non-industrial operations, noninsurance revenue consists of the sale of manufactured goods and services. The following table presents noninsurance revenue for the Alleghany Capital segment for the three and six months ended June 30, 2020 and 2019:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2020		2019		2020		2019
	($ in millions)
Industrial(1)	$	280.6	$	318.3	$	523.1	$	578.4
Non-Industrial(2)		202.6		275.1		417.3		520.0
Corporate & other		—		0.3		0.1		0.3
Alleghany Capital	$	483.2	$	593.7	$	940.5	$	1,098.7

(1) For the three and six months ended June 30, 2020 and 2019, the vast majority of noninsurance revenue was recognized as goods and services transferred to customers over time.

(2) For the three and six months ended June 30, 2020, approximately 74 percent and 78 percent, respectively, of noninsurance revenue was recognized as services transferred to customers over time, with the remainder recognized as goods transferred at a point in time. For the three and six months ended June 30, 2019, 77 percent and 72 percent, respectively, of noninsurance revenue was recognized as services transferred to customers over time, with the remainder recognized as goods transferred at a point in time.

11. Debt

(a) Senior Notes

On May 18, 2020, Alleghany completed a public offering of $500.0 million aggregate principal amount of its 3.625% senior notes due on May 15, 2030 (the “2030 Senior Notes”).  The 2030 Senior Notes are unsecured and unsubordinated general obligations of Alleghany.  Interest on the 2030 Senior Notes is payable semi-annually in arrears on May 15 and November 15 of each year.  The terms of the 2030 Senior Notes permit redemption prior to maturity.  The indenture under which the 2030 Senior Notes were issued contains covenants that impose conditions on Alleghany’s ability to create liens on the capital stock of AIHL, TransRe or RSUI.  The 2030 Senior Notes were issued at approximately 99.9 percent of par, resulting in proceeds after underwriting discount, commissions and other expenses of $494.8 million, and an effective yield of approximately 3.64 percent.  Approximately $4.6 million of underwriting discount, commissions and other expenses were recorded as deferred charges, which are amortized over the life of the 2030 Senior Notes.

On September 20, 2010, Alleghany completed a public offering of $300.0 million aggregate principal amount of its 5.625% senior notes due on September 15, 2020 (the “2020 Senior Notes”). The terms of the 2020 Senior Notes permitted redemption prior to their maturity. The 2020 Senior Notes were issued at approximately 99.6 percent of par, resulting in proceeds after underwriting discount, commissions and other expenses of $298.9 million and an effective yield of approximately 5.67 percent.

On January 15, 2020, Alleghany redeemed all of its outstanding 2020 Senior Notes for $312.7 million, consisting of the $300.0 million aggregate principal amount redeemed, $7.1 million of redemption premium and $5.6 million of accrued and unpaid interest on the principal amount being redeemed to the date of redemption. As a result of this early redemption of the 2020 Senior Notes, Alleghany recorded a realized loss, before tax, of $7.1 million in the first six months of 2020.

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See Note 8 to Notes to Consolidated Financial Statements set forth in Part II, Item 8, “Financial Statements and Supplementary Data” of the 2019 Form 10-K for additional information on other Alleghany senior notes outstanding.

(b) Alleghany Capital Operating Subsidiaries

The debt associated with Alleghany Capital’s operating subsidiaries totaled $438.3 million and $367.1 million as of June 30, 2020 and December 31, 2019, respectively, and is generally used to support working capital needs and to help finance acquisitions. As of June 30, 2020, the $438.3 million included:

• $161.6 million of borrowings by Jazwares under its available credit facilities and borrowings incurred and assumed from its acquisition of Wicked Cool Toys, LLC in October 2019 and its acquisition of Kelly Toys Holdings, LLC in April 2020;

• $74.4 million of borrowings by Wilbert under its available credit facility and term loans;

• $65.2 million of term loans at Kentucky Trailer primarily related to borrowings to finance small acquisitions, including its acquisitions of a controlling interest in two manufacturers of aluminum feed transportation equipment in December 2018 and July 2019, and borrowings under its available credit facilities;

• $58.0 million of borrowings by W&W|AFCO Steel under its available credit facilities and term loans (including borrowings incurred and assumed from its acquisition of Hirschfeld Holdings, LP in February 2018);

• $43.6 million of borrowings by IPS under its available credit facility and term loans, in part to finance a small acquisition in May 2019; and$

• $35.5 million of term loans at PCT primarily related to borrowings to finance the acquisition of a waterjet orifice and nozzle manufacturer in 2016 and the acquisition of a consumable cutting tool manufacturer in June 2019.

None of these liabilities are guaranteed by Alleghany or Alleghany Capital. In December 2019, third-party, floating-rate term loans at Concord were repaid and replaced with approximately $33 million of intercompany floating-rate debt funded by the Alleghany parent company. The intercompany debt and related interest expenses are eliminated at the Alleghany consolidated level.

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

The following is a discussion and analysis of our financial condition and results of operations for the three and six months ended June 30, 2020 and 2019. This discussion and analysis should be read in conjunction with our unaudited consolidated financial statements and Notes to Unaudited Consolidated Financial Statements set forth in Part I, Item 1, “Financial Statements” of this Quarterly Report on Form 10-Q for the quarter ended June 30, 2020, or this “Form 10-Q,” and our audited consolidated financial statements and Notes to Consolidated Financial Statements set forth in Part II, Item 8, “Financial Statements and Supplementary Data” of the Annual Report on Form 10-K for the year ended December 31, 2019, or the “2019 Form 10-K.” This discussion contains forward-looking statements that involve risks and uncertainties and that are not historical facts, including statements about our beliefs and expectations. Our actual results could differ materially from those anticipated in these forward-looking statements as a result of various factors, including those discussed below and particularly under the headings “Risk Factors,” “Business” and “Note on Forward-Looking Statements” contained in Item 1A, Item 1, and Part I of the 2019 Form 10-K, respectively.

References in this Form 10-Q to the “Company,” “Alleghany,” “we,” “us,” and “our” refer to Alleghany Corporation and its consolidated subsidiaries unless the context otherwise requires. In addition, unless the context otherwise requires, references to

• “TransRe” are to our wholly-owned reinsurance holding company subsidiary Transatlantic Holdings, Inc. and its subsidiaries;

• “AIHL” are to our wholly-owned insurance holding company subsidiary Alleghany Insurance Holdings LLC;

• “RSUI” are to our wholly-owned subsidiary RSUI Group, Inc. and its subsidiaries;

• “CapSpecialty” are to our wholly-owned subsidiary CapSpecialty, Inc. and its subsidiaries;

• “AIHL Re” are to our wholly-owned subsidiary AIHL Re LLC;

• “Roundwood” are to our wholly-owned subsidiary Roundwood Asset Management LLC;

• “SORC” are to our wholly-owned subsidiary Stranded Oil Resources Corporation and its subsidiaries;

• “Alleghany Capital” are to our wholly-owned subsidiary Alleghany Capital Corporation and its subsidiaries;

• “PCT” are to our wholly-owned subsidiary Precision Cutting Technologies, Inc. and its subsidiaries;

• “Kentucky Trailer” are to our majority-owned subsidiary R.C. Tway Company, LLC and its subsidiaries;

• “IPS” are to our majority-owned subsidiary IPS-Integrated Project Services, LLC and its subsidiaries;

• “Jazwares” are to our majority-owned subsidiary Jazwares, LLC and its subsidiaries and affiliates;

• “W&W|AFCO Steel” are to our majority-owned subsidiary WWSC Holdings, LLC and its subsidiaries;

• “Concord” are to our majority-owned subsidiary CHECO Holdings, LLC and its subsidiaries;

• “Wilbert” are to our majority-owned subsidiary Wilbert Funeral Services, Inc. and its subsidiaries; and

• “Alleghany Properties” are to our wholly-owned subsidiary Alleghany Properties Holdings LLC and its subsidiaries.

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Note on Forward-Looking Statements

Certain statements contained in this Form 10-Q may be deemed to be “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements may be identified by the use of words such as “may,” “will,” “expect,” “project,” “estimate,” “anticipate,” “plan,” “believe,” “potential,” “should” or the negative versions of those words or other comparable words. Forward-looking statements do not relate solely to historical or current facts, rather they are based on management’s expectations as well as certain assumptions and estimates made by, and information available to, management at the time. These statements are not guarantees of future performance. These forward-looking statements are based upon Alleghany’s current expectations and are subject to a number of uncertainties and risks that could significantly affect current plans, anticipated actions and Alleghany’s future financial condition and results. Factors that could cause these forward-looking statements to differ, possibly materially, from that currently contemplated include:

• significant weather-related or other natural or man-made catastrophes and disasters;

• the effects of outbreaks of pandemics or contagious diseases, including the length and severity of the recent worldwide coronavirus pandemic, known as COVID-19, including its impact on our business;

• the cyclical nature of the property and casualty reinsurance and insurance industries;

• changes in market prices of our significant equity investments and changes in value of our debt securities portfolio;

• adverse loss development for events insured by our reinsurance and insurance subsidiaries in either the current year or prior years;

• the long-tail and potentially volatile nature of certain casualty lines of business written by our reinsurance and insurance subsidiaries;

• the cost and availability of reinsurance;

• the reliance by our reinsurance and insurance operating subsidiaries on a limited number of brokers;

• legal, political, judicial and regulatory changes;

• increases in the levels of risk retention by our reinsurance and insurance subsidiaries;

• changes in the ratings assigned to our reinsurance and insurance subsidiaries;

• claims development and the process of estimating reserves;

• exposure to terrorist acts and acts of war;

• the willingness and ability of our reinsurance and insurance subsidiaries’ reinsurers to pay reinsurance recoverables owed to our reinsurance and insurance subsidiaries;

• the uncertain nature of damage theories and loss amounts;

• the loss of key personnel of our reinsurance or insurance operating subsidiaries;

• fluctuation in foreign currency exchange rates;

• the failure to comply with the restrictive covenants contained in the agreements governing our indebtedness;

• the ability to make payments on, or repay or refinance, our debt;

• risks inherent in international operations; and

• difficult and volatile conditions in the global market.

Additional risks and uncertainties include general economic and political conditions, including the effects of a prolonged U.S. or global economic downturn or recession; changes in costs; variations in political, economic or other factors; risks relating to conducting operations in a competitive environment; effects of acquisition and disposition activities, inflation rates, or recessionary or expansive trends; changes in interest rates; extended labor disruptions, civil unrest, or other external factors over which we have no control; changes in our plans, strategies, objectives, expectations, or intentions, which may happen at any time at our discretion; and other factors discussed in the 2019 Form 10-K and subsequent filings with the Securities and Exchange Commission, or the “SEC.” All forward-looking statements speak only as of the date they are made and are based on information available at that time. Alleghany does not undertake any obligation to update or revise any forward-looking statements to reflect subsequent circumstances or events. See Part I, Item 1A, “Risk Factors” of the 2019 Form 10-K and Part II, Item 1A, “Risk Factors” of this Form 10-Q for additional information.

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Comment on Non-GAAP Financial Measures

Throughout this Form 10-Q, our analysis of our financial condition and results of operations is based on our consolidated financial statements which have been prepared in accordance with accounting principles generally accepted in the U.S., or “GAAP.” Our results of operations have been presented in the way that we believe will be the most meaningful and useful to investors, analysts, rating agencies and others who use financial information in evaluating our performance. This presentation includes the use of underwriting profit and adjusted earnings before income taxes, which are “non-GAAP financial measures,” as such term is defined in Item 10(e) of Regulation S-K promulgated by the SEC. The presentation of these financial measures is not intended to be considered in isolation or as a substitute for, or superior to, financial information prepared and presented in accordance with GAAP. These measures may also be different from non-GAAP financial measures used by other companies, limiting their usefulness for comparison purposes. A discussion of our calculation and use of these financial measures is provided below.

Underwriting profit is a non-GAAP financial measure for our reinsurance and insurance segments. Underwriting profit represents net premiums earned less net loss and loss adjustment expenses, or “LAE,” and commissions, brokerage and other underwriting expenses, all as determined in accordance with GAAP and does not include: (i) net investment income; (ii) change in the fair value of equity securities; (iii) net realized capital gains; (iv) change in allowance for credit losses on available for sale securities; (v) noninsurance revenue; (vi) other operating expenses; (vii) corporate administration; (viii) amortization of intangible assets; and (ix) interest expense. We use underwriting profit as a supplement to earnings before income taxes, the most comparable GAAP financial measure, to evaluate the performance of our reinsurance and insurance segments and believe that underwriting profit provides useful additional information to investors because it highlights net earnings attributable to our reinsurance and insurance segments’ underwriting performance. Earnings before income taxes may show a profit despite an underlying underwriting loss, and when underwriting losses persist over extended periods, a reinsurance or an insurance company’s ability to continue as an ongoing concern may be at risk. A reconciliation of underwriting profit to earnings before income taxes is presented within “Consolidated Results of Operations.”

Adjusted earnings before income taxes is a non-GAAP financial measure for our Alleghany Capital segment. Adjusted earnings before income taxes represents noninsurance revenue and net investment income less other operating expenses and interest expense, and does not include: (i) amortization of intangible assets; (ii) change in the fair value of equity securities; (iii) net realized capital gains; (iv) change in allowance for credit losses on available for sale securities; and (v) income taxes. Because adjusted earnings before income taxes excludes amortization of intangible assets, change in the fair value of equity securities, net realized capital gains, change in allowance for credit losses on available for sale securities and income taxes, it provides an indication of economic performance that is not affected by levels of effective tax rates or levels of amortization resulting from acquisition accounting. We use adjusted earnings before income taxes as a supplement to earnings before income taxes, the most comparable GAAP financial measure, to evaluate the performance of certain of our noninsurance operating subsidiaries and investments. A reconciliation of adjusted earnings before income taxes to earnings before income taxes is presented within “Consolidated Results of Operations.”

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Overview

The following overview does not address all of the matters covered in the other sections of Management’s Discussion and Analysis of Financial Condition and Results of Operations or contain all of the information that may be important to our stockholders or the investing public. This overview should be read in conjunction with the other sections of Management’s Discussion and Analysis of Financial Condition and Results of Operations.

• Net earnings attributable to Alleghany stockholders were $177.4 million in the second quarter of 2020, compared with $295.5 million in the second quarter of 2019, and were net losses of $183.8 million in the first six months of 2020, compared with net earnings of $735.7 million in the first six months of 2019.

• Net investment income decreased by 16.8 percent and 13.2 percent in the second quarter and first six months of 2020, respectively, from the corresponding 2019 periods.

• Net premiums written increased by 2.2 percent and 6.3 percent in the second quarter and first six months of 2020, respectively, from the corresponding 2019 periods.

• Underwriting loss was $39.5 million in the second quarter of 2020, compared with underwriting profit of $114.9 million in the second quarter of 2019, and underwriting loss was $63.9 million in the first six months of 2020, compared with underwriting profit of $199.6 million in the first six months of 2019.

• The combined ratio for our reinsurance and insurance segments was 102.8 percent in the second quarter of 2020, compared with 91.6 percent in the second quarter of 2019, and 102.3 percent in the first six months of 2020, compared with 92.5 percent in the first six months of 2019.

• Catastrophe losses, net of reinsurance, were $164.6 million in the second quarter of 2020, compared with $16.3 million in the second quarter of 2019, and $346.2 million in the first six months of 2020, compared with $19.6 million in the first six months of 2019.

• Net favorable prior accident year loss reserve development was $34.7 million in the second quarter of 2020, compared with $56.6 million in the second quarter of 2019, and $93.7 million in the first six months of 2020, compared with $94.0 million in the first six months of 2019.

• Noninsurance revenue for Alleghany Capital was $483.2 million in the second quarter of 2020, compared with $593.7 million in the second quarter of 2019, and $940.5 million in the first six months of 2020, compared with $1,098.7 million in the first six months of 2019.

• Earnings before income taxes for Alleghany Capital were $9.8 million in the second quarter of 2020, compared with $33.4 million in the second quarter of 2019, and $10.1 million in the first six months of 2020, compared with $63.6 million in the first six months of 2019. Adjusted earnings before income taxes were $5.3 million in the second quarter of 2020, compared with $41.6 million in the second quarter of 2019, and $9.9 million in the first six months of 2020, compared with $78.1 million in the first six months of 2019.

As of June 30, 2020, we had total assets of $27.6 billion and total stockholders’ equity attributable to Alleghany stockholders of $8.5 billion. As of June 30, 2020, we had consolidated total investments of approximately $18.6 billion, consisting of $15.0 billion invested in debt securities, $1.4 billion invested in equity securities, $1.1 billion invested in short-term investments, $0.7 billion invested in commercial mortgage loans and $0.4 billion invested in other invested assets.

The ongoing COVID-19 global pandemic, or the “Pandemic,” has significantly disrupted many aspects of society as well as financial markets, and has caused widespread global economic dislocation. At the parent and subsidiary levels, we have implemented a variety of business continuation and crisis management policies and procedures to reduce the risk of infection to our employees and others.  

Among other impacts on the economy, the Pandemic has adversely impacted financial markets, which in turn impacted our equity securities portfolio. In the first six months of 2020 and despite a partial recovery in the second quarter of 2020, the fair value of our equity securities depreciated by $280.8 million. As further described below, we have also recorded certain additional credit-related losses on our debt securities portfolio, commercial mortgage loan portfolio and reinsurance recoverables, as well as impairment losses on SORC’s oil field assets. Given the recent recovery of the bond markets, a portion of the allowances for credit losses we established on our debt securities portfolio as of March 31, 2020 have been reversed as of June 30, 2020.

We also incurred $164.6 million and $346.2 million of catastrophe losses in the second quarter and first six months of 2020, respectively, of which $135.3 million and $288.1 million, respectively, arose from the Pandemic.  Most of the Pandemic losses were incurred at TransRe, and include those from event cancellation coverage for conferences and sporting events as well as other property coverages and, to a lesser extent, accident and health and trade credit. Pandemic losses at RSUI primarily relate to business interruption claims and related estimated legal expenses. Our Pandemic loss estimates were based on information available at the time, including an analysis of reported claims, an underwriting review of in-force contracts and other factors requiring considerable judgment. Our estimate for Pandemic losses does not reflect judicial, legislative and regulatory risk that could expand coverage beyond the terms of our treaty and policy language, although it does reflect provisions for related legal expenses. The impact of the Pandemic will also be reflected in future results, including our third quarter 2020 results.

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TransRe’s Pandemic catastrophe losses were $115.0 million and $267.8 million for the second quarter and first six months of 2020, respectively, which include $37 million and $111 million, respectively, of losses related to specific event cancellation treaties underwritten in the U.S., which TransRe began to exit in February 2019. Based on current information, estimated exposed limits remaining on this portfolio, net of provisions, are approximately $25 million for first and second quarter 2020 events, $35 million for third and fourth quarter events and $70 million for events scheduled throughout 2021.  Events and event cancellation policies are not uniform in nature. Ultimate losses will depend on the timing of gathering restrictions being lifted, whether the event can be rescheduled and how far in advance the event is postponed or cancelled. As such, cancellation or postponement of the event does not necessarily mean a full limit will be paid.  Furthermore, there could be additional incidental losses where event cancellation policies comprise a small portion of exposure to certain multi-line treaties.

We cannot reasonably estimate the length or severity of the Pandemic, or the extent to which the related disruption may adversely impact our results of operations, financial position and cash flows. Such potential adverse impacts of a prolonged Pandemic on our operations, financial position and cash flows include further declines in our equity securities portfolio, additional credit-related realized and unrealized losses on our debt securities and commercial mortgage portfolios, additional credit losses on our reinsurance recoverables and other receivables, further losses from event cancellation and other coverages from our reinsurance and insurance subsidiaries, increased litigation and impairment of certain Alleghany Capital subsidiary goodwill and intangible assets.

Consolidated Results of Operations

The following table presents our consolidated revenues, costs and expenses and earnings:

	Three Months Ended					Six Months Ended
	June 30,					June 30,
	2020			2019		2020			2019
	($ in millions)
Revenues
Net premiums earned	$	1,394.9		$	1,356.0	$	2,839.3		$	2,653.3
Net investment income		118.7			142.7		230.7			265.8
Change in the fair value of equity securities		242.2			143.7		(280.8	)		536.0
Net realized capital gains		(38.1	)		12.4		(25.1	)		16.8
Change in allowance for credit losses on available for sale securities		17.0			—		(14.4	)		(10.0	)
Noninsurance revenue		492.7			603.9		960.6			1,118.0
Total revenues		2,227.4			2,258.7		3,710.3			4,579.9
Costs and Expenses
Net loss and loss adjustment expenses		1,024.4			796.8		2,051.8			1,589.3
Commissions, brokerage and other underwriting expenses		410.0			444.3		851.4			864.4
Other operating expenses		510.3			581.5		977.0			1,083.9
Corporate administration		18.6			26.0		4.2			45.3
Amortization of intangible assets		12.1			8.8		21.7			15.7
Interest expense		22.2			25.1		40.6			48.7
Total costs and expenses		1,997.6			1,882.5		3,946.7			3,647.3
Earnings (losses) before income taxes		229.8			376.2		(236.4	)		932.6
Income taxes		53.3			71.3		(51.4	)		179.9
Net earnings (losses)		176.5			304.9		(185.0	)		752.7
Net (losses) earnings attributable to noncontrolling interests		(0.9	)		9.4		(1.2	)		17.0
Net earnings (losses) attributable to Alleghany stockholders	$	177.4		$	295.5	$	(183.8	)	$	735.7

Alleghany’s segments are reported in a manner consistent with the way management evaluates the businesses. As such, Alleghany classifies its businesses into three reportable segments – reinsurance, insurance and Alleghany Capital. Corporate activities are not classified as a segment.

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See Note 10 to Notes to Unaudited Consolidated Financial Statements set forth in Part I, Item 1, “Financial Statements” of this Form 10-Q for additional detail on our segments and corporate activities. The tables below present the results for our segments and for corporate activities for the three and six months ended June 30, 2020 and 2019:

	Segments
Three Months Ended June 30, 2020	Reinsurance Segment			Insurance Segment			Subtotal			Alleghany Capital		Total Segments			Corporate Activities(1)			Consolidated
	($ in millions)
Gross premiums written	$	1,153.9		$	575.9		$	1,729.8		$	—	$	1,729.8		$	(8.6	)	$	1,721.2
Net premiums written		1,086.5			391.5			1,478.0			—		1,478.0			—			1,478.0
Net premiums earned		1,071.0			323.9			1,394.9			—		1,394.9			—			1,394.9
Net loss and LAE:
Current year (excluding catastrophe losses)		713.6			180.9			894.5			—		894.5			—			894.5
Current year catastrophe losses		115.8			48.8			164.6			—		164.6			—			164.6
Prior years		(51.2	)		16.5			(34.7	)		—		(34.7	)		—			(34.7	)
Total net loss and LAE		778.2			246.2			1,024.4			—		1,024.4			—			1,024.4
Commissions, brokerage and other    underwriting expenses		323.1			86.9			410.0			—		410.0			—			410.0
Underwriting (loss) profit(2)	$	(30.3	)	$	(9.2	)	$	(39.5	)		—		(39.5	)		—			(39.5	)
Net investment income								115.4			—		115.4			3.3			118.7
Change in the fair value of equity securities								242.2			—		242.2			—			242.2
Net realized capital gains								(10.1	)		16.4		6.3			(44.4	)		(38.1	)
Change in allowance for credit losses on available for sale securities								16.6			—		16.6			0.4			17.0
Noninsurance revenue								8.3			483.2		491.5			1.2			492.7
Other operating expenses								33.3			473.6		506.9			3.4			510.3
Corporate administration								0.5			—		0.5			18.1			18.6
Amortization of intangible assets								0.2			11.9		12.1			—			12.1
Interest expense								6.8			4.3		11.1			11.1			22.2
Earnings (losses) before income taxes							$	292.1		$	9.8	$	301.9		$	(72.1	)	$	229.8
Loss ratio(3):
Current year (excluding catastrophe losses)		66.7	%		55.8	%		64.1	%
Current year catastrophe losses		10.8	%		15.1	%		11.8	%
Prior years		(4.8	%)		5.1	%		(2.5	%)
Total net loss and LAE		72.7	%		76.0	%		73.4	%
Expense ratio(4)		30.2	%		26.8	%		29.4	%
Combined ratio(5)		102.9	%		102.8	%		102.8	%

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	Segments
Three Months Ended June 30, 2019	Reinsurance Segment			Insurance Segment			Subtotal			Alleghany Capital		Total Segments			Corporate Activities(1)			Consolidated
	($ in millions)
Gross premiums written	$	1,210.7		$	466.2		$	1,676.9		$	—	$	1,676.9		$	(6.1	)	$	1,670.8
Net premiums written		1,112.9			333.6			1,446.5			—		1,446.5			—			1,446.5
Net premiums earned		1,074.9			281.1			1,356.0			—		1,356.0			—			1,356.0
Net loss and LAE:
Current year (excluding catastrophe losses)		689.9			147.2			837.1			—		837.1			—			837.1
Current year catastrophe losses		—			16.3			16.3			—		16.3			—			16.3
Prior years		(44.8	)		(11.8	)		(56.6	)		—		(56.6	)		—			(56.6	)
Total net loss and LAE		645.1			151.7			796.8			—		796.8			—			796.8
Commissions, brokerage and other    underwriting expenses		353.9			90.4			444.3			—		444.3			—			444.3
Underwriting profit(2)	$	75.9		$	39.0			114.9			—		114.9			—			114.9
Net investment income								138.3			0.9		139.2			3.5			142.7
Change in the fair value of equity securities								143.3			—		143.3			0.4			143.7
Net realized capital gains								12.2			0.2		12.4			—			12.4
Change in allowance for credit losses on available for sale securities								—			—		—			—			—
Noninsurance revenue								6.6			593.7		600.3			3.6			603.9
Other operating expenses								26.2			548.3		574.5			7.0			581.5
Corporate administration								1.8			—		1.8			24.2			26.0
Amortization of intangible assets								0.4			8.4		8.8			—			8.8
Interest expense								6.8			4.7		11.5			13.6			25.1
Earnings (losses) before income taxes							$	380.1		$	33.4	$	413.5		$	(37.3	)	$	376.2
Loss ratio(3):
Current year (excluding catastrophe losses)		64.2	%		52.4	%		61.8	%
Current year catastrophe losses		—			5.8	%		1.2	%
Prior years		(4.2	%)		(4.2	%)		(4.2	%)
Total net loss and LAE		60.0	%		54.0	%		58.8	%
Expense ratio(4)		32.9	%		32.2	%		32.8	%
Combined ratio(5)		92.9	%		86.2	%		91.6	%

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	Segments
Six Months Ended June 30, 2020	Reinsurance Segment			Insurance Segment			Subtotal			Alleghany Capital		Total Segments			Corporate Activities(1)			Consolidated
	($ in millions)
Gross premiums written	$	2,481.4		$	1,027.3		$	3,508.7		$	—	$	3,508.7		$	(16.9	)	$	3,491.8
Net premiums written		2,297.5			714.2			3,011.7			—		3,011.7			—			3,011.7
Net premiums earned		2,204.1			635.2			2,839.3			—		2,839.3			—			2,839.3
Net loss and LAE:
Current year (excluding catastrophe losses)		1,461.3			338.0			1,799.3			—		1,799.3			—			1,799.3
Current year catastrophe losses		288.0			58.2			346.2			—		346.2			—			346.2
Prior years		(108.9	)		15.2			(93.7	)		—		(93.7	)		—			(93.7	)
Total net loss and LAE		1,640.4			411.4			2,051.8			—		2,051.8			—			2,051.8
Commissions, brokerage and other    underwriting expenses		672.9			178.5			851.4			—		851.4			—			851.4
Underwriting (loss) profit(2)	$	(109.2	)	$	45.3		$	(63.9	)		—		(63.9	)		—			(63.9	)
Net investment income								225.0			1.8		226.8			3.9			230.7
Change in the fair value of equity securities								(279.4	)		—		(279.4	)		(1.4	)		(280.8	)
Net realized capital gains								35.1			21.4		56.5			(81.6	)		(25.1	)
Change in allowance for credit losses on available for sale securities								(14.1	)		—		(14.1	)		(0.3	)		(14.4	)
Noninsurance revenue								15.6			940.5		956.1			4.5			960.6
Other operating expenses								43.1			924.3		967.4			9.6			977.0
Corporate administration								(1.6	)		—		(1.6	)		5.8			4.2
Amortization of intangible assets								0.5			21.2		21.7			—			21.7
Interest expense								13.5			8.1		21.6			19.0			40.6
(Losses) earnings before income taxes							$	(137.2	)	$	10.1	$	(127.1	)	$	(109.3	)	$	(236.4	)
Loss ratio(3):
Current year (excluding catastrophe losses)		66.2	%		53.2	%		63.4	%
Current year catastrophe losses		13.1	%		9.2	%		12.2	%
Prior years		(4.9	%)		2.4	%		(3.3	%)
Total net loss and LAE		74.4	%		64.8	%		72.3	%
Expense ratio(4)		30.5	%		28.1	%		30.0	%
Combined ratio(5)		104.9	%		92.9	%		102.3	%

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	Segments
Six Months Ended June 30, 2019	Reinsurance Segment			Insurance Segment			Subtotal			Alleghany Capital		Total Segments			Corporate Activities(1)			Consolidated
	($ in millions)
Gross premiums written	$	2,442.3		$	848.0		$	3,290.3		$	—	$	3,290.3		$	(12.9	)	$	3,277.4
Net premiums written		2,220.5			611.6			2,832.1			—		2,832.1			—			2,832.1
Net premiums earned		2,104.1			549.2			2,653.3			—		2,653.3			—			2,653.3
Net loss and LAE:
Current year (excluding catastrophe losses)		1,379.5			284.2			1,663.7			—		1,663.7			—			1,663.7
Current year catastrophe losses		—			19.6			19.6			—		19.6			—			19.6
Prior years		(81.2	)		(12.8	)		(94.0	)		—		(94.0	)		—			(94.0	)
Total net loss and LAE		1,298.3			291.0			1,589.3			—		1,589.3			—			1,589.3
Commissions, brokerage and other    underwriting expenses		689.9			174.5			864.4			—		864.4			—			864.4
Underwriting profit(2)	$	115.9		$	83.7			199.6			—		199.6			—			199.6
Net investment income								256.3			2.2		258.5			7.3			265.8
Change in the fair value of equity securities								532.4			—		532.4			3.6			536.0
Net realized capital gains								16.2			0.6		16.8			—			16.8
Change in allowance for credit losses on available for sale securities								(10.0	)		—		(10.0	)		—			(10.0	)
Noninsurance revenue								12.0			1,098.7		1,110.7			7.3			1,118.0
Other operating expenses								55.8			1,013.8		1,069.6			14.3			1,083.9
Corporate administration								2.8			—		2.8			42.5			45.3
Amortization of intangible assets								0.6			15.1		15.7			—			15.7
Interest expense								13.6			9.0		22.6			26.1			48.7
Earnings (losses) before income taxes							$	933.7		$	63.6	$	997.3		$	(64.7	)	$	932.6
Loss ratio(3):
Current year (excluding catastrophe losses)		65.6	%		51.7	%		62.7	%
Current year catastrophe losses		—			3.6	%		0.7	%
Prior years		(3.9	%)		(2.3	%)		(3.5	%)
Total net loss and LAE		61.7	%		53.0	%		59.9	%
Expense ratio(4)		32.8	%		31.8	%		32.6	%
Combined ratio(5)		94.5	%		84.8	%		92.5	%

(1) Includes elimination of minor reinsurance activity between segments.  

(2) Underwriting profit represents net premiums earned less net loss and LAE and commissions, brokerage and other underwriting expenses, all as determined in accordance with GAAP, and does not include net investment income, change in the fair value of equity securities, net realized capital gains, change in allowance for credit losses on available for sale securities, noninsurance revenue, other operating expenses, corporate administration, amortization of intangible assets and interest expense. Underwriting profit is a non-GAAP financial measure and does not replace earnings before income taxes determined in accordance with GAAP as a measure of profitability. See “Comment on Non-GAAP Financial Measures” herein for additional detail on the presentation of our results of operations.

(3) The loss ratio is derived by dividing the amount of net loss and LAE by net premiums earned, all as determined in accordance with GAAP.

(4) The expense ratio is derived by dividing the amount of commissions, brokerage and other underwriting expenses by net premiums earned, all as determined in accordance with GAAP.

(5) The combined ratio is the sum of the loss ratio and the expense ratio, all as determined in accordance with GAAP. The combined ratio represents the percentage of each premium dollar a reinsurance or an insurance company has to spend on net loss and LAE, and commissions, brokerage and other underwriting expenses.

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Comparison of the Three and Six Months Ended June 30, 2020 and 2019

Premiums. The following table presents our consolidated premiums:

	Three Months Ended							Six Months Ended
	June 30,				Percent			June 30,				Percent
	2020		2019		Change			2020		2019		Change
	($ in millions)
Premiums written:
Gross premiums written	$	1,721.2	$	1,670.8		3.0	%	$	3,491.8	$	3,277.4		6.5	%
Net premiums written		1,478.0		1,446.5		2.2	%		3,011.7		2,832.1		6.3	%
Net premiums earned		1,394.9		1,356.0		2.9	%		2,839.3		2,653.3		7.0	%

The increases in gross premiums written in the second quarter and first six months of 2020 from the comparable 2019 periods are attributable to growth at our insurance segment, primarily RSUI. Growth at RSUI, which exceeded 25 percent for the second quarter and first six months of 2020, primarily reflects growth in most lines of business due to increases in business opportunities, higher rates and improved general market conditions, particularly in the property, umbrella/excess and directors’ and officers’ liability lines of business.  

The increase in the second quarter of 2020 from the second quarter of 2019 was partially offset by a decline at our reinsurance segment arising mainly from automobile-related premium rebates at our cedants in reaction to a Pandemic-driven reduction in personal and commercial automobile usage worldwide, partially offset by growth in most other non-automobile lines of business and generally improving rates.  The reduction in the gross premiums written in the personal automobile lines of business in the U.S. also impacted a certain large whole account quota share treaty, or the “Quota Share Treaty.” Quota Share Treaty gross premiums written decreased to $140.3 million and $309.5 million in the second quarter and first six months of 2020, respectively, from $163.7 million and $327.7 million in the second quarter and first six months of 2019, respectively.

The increases in net premiums earned in the second quarter and first six months of 2020 from the comparable 2019 periods reflect growth in insurance segment gross premiums written in recent quarters, primarily at RSUI, partially offset by increases in ceded premiums written in recent quarters at RSUI.

A detailed comparison of premiums by segment for the second quarter and first six months of 2020 and 2019 is contained in the following pages.

Net loss and LAE. The following table presents our consolidated net loss and LAE:

	Three Months Ended									Six Months Ended
	June 30,						Percent			June 30,						Percent
	2020			2019			Change			2020			2019			Change
	($ in millions)
Net loss and LAE:
Current year (excluding catastrophe losses)	$	894.5		$	837.1			6.9	%	$	1,799.3		$	1,663.7			8.2	%
Current year catastrophe losses		164.6			16.3			909.8	%		346.2			19.6			1,666.3	%
Prior years		(34.7	)		(56.6	)		(38.7	%)		(93.7	)		(94.0	)		(0.3	%)
Total net loss and LAE	$	1,024.4		$	796.8			28.6	%	$	2,051.8		$	1,589.3			29.1	%
Loss ratio:
Current year (excluding catastrophe losses)		64.1	%		61.8	%					63.4	%		62.7	%
Current year catastrophe losses		11.8	%		1.2	%					12.2	%		0.7	%
Prior years		(2.5	%)		(4.2	%)					(3.3	%)		(3.5	%)
Total net loss and LAE		73.4	%		58.8	%					72.3	%		59.9	%

The increases in net loss and LAE in the second quarter and first six months of 2020 from the comparable 2019 periods primarily reflect Pandemic-related catastrophe losses, as discussed above.  To a lesser extent, the increase in net loss and LAE in the second quarter of 2020 also reflects lower favorable prior accident year loss reserve development due to unfavorable prior accident year loss reserve development at RSUI.

A detailed comparison of net loss and LAE by segment for the second quarter and first six months of 2020 and 2019 is contained in the following pages.

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Commissions, brokerage and other underwriting expenses. The following table presents our consolidated commissions, brokerage and other underwriting expenses:

	Three Months Ended									Six Months Ended
	June 30,						Percent			June 30,						Percent
	2020			2019			Change			2020			2019			Change
	($ in millions)
Commissions, brokerage and other underwriting expenses	$	410.0		$	444.3			(7.7	%)	$	851.4		$	864.4			(1.5	%)
Expense ratio		29.4	%		32.8	%					30.0	%		32.6	%

The decreases in commissions, brokerage and other underwriting expenses in the second quarter and first six months of 2020 from the comparable 2019 periods primarily reflect lower overall commission rates, lower annual incentive compensation accruals and a Pandemic-driven reduction in travel and entertainment costs, partially offset by the impact of higher net premiums earned, as discussed above.

A detailed comparison of commissions, brokerage and other underwriting expenses by segment for the second quarter and first six months of 2020 and 2019 is contained in the following pages.

Underwriting profit. The following table presents our consolidated underwriting profit (loss):

	Three Months Ended									Six Months Ended
	June 30,						Percent			June 30,						Percent
	2020			2019			Change			2020			2019			Change
	($ in millions)
Underwriting (loss) profit	$	(39.5	)	$	114.9			(134.4	%)	$	(63.9	)	$	199.6			(132.0	%)
Combined ratio		102.8	%		91.6	%					102.3	%		92.5	%

The underwriting losses in the second quarter and first six months of 2020 compared with the underwriting profits in the comparable 2019 periods primarily reflect Pandemic-related catastrophe losses at our reinsurance segment and, to a lesser extent, RSUI, as discussed above. To a lesser extent, the underwriting loss in the second quarter of 2020 also reflects lower net favorable prior accident year loss reserve development due to unfavorable prior accident year loss reserve development at RSUI.  

A detailed comparison of underwriting profit by segment for the second quarter and first six months of 2020 and 2019 is contained in the following pages.

Investment results. The following table presents our consolidated investment results:

	Three Months Ended								Six Months Ended
	June 30,					Percent			June 30,						Percent
	2020			2019		Change			2020			2019			Change
	($ in millions)
Net investment income	$	118.7		$	142.7		(16.8	%)	$	230.7		$	265.8			(13.2	%)
Change in the fair value of equity securities		242.2			143.7		68.5	%		(280.8	)		536.0			(152.4	%)
Net realized capital gains		(38.1	)		12.4		(407.3	%)		(25.1	)		16.8			(249.4	%)
Change in allowance for credit losses on available for sale securities		17.0			—		(—	%)		(14.4	)		(10.0	)		44.0	%

The decreases in net investment income in the second quarter and first six months of 2020 from the comparable 2019 periods primarily reflect decreases in interest income arising from the impact of low reinvestment yields on debt securities and lower yields on short term investments and floating-rate debt securities.  To a lesser extent, the decreases in net investment income reflect lower dividend income from reductions in our equity security portfolio and, for the first six months of 2020, lower partnership income due to the impact of the Pandemic on lower-quality debt securities held by certain of our investment partnerships.

The change in the fair value of equity securities in the first six months of 2020 reflects depreciation in the value of our equity securities portfolio due primarily to the impact of the Pandemic and related economic and financial market disruptions. The change in the fair value of equity securities in the second quarter of 2020 reflects a partial recovery of the equity markets and our equity securities portfolio, as concerns about the Pandemic moderated. The changes in the fair value of equity securities in the second quarter and first six months of 2019 reflect appreciation in the value of our equity securities portfolio, primarily from our holdings in the technology, industrial and financial sectors.

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The net realized capital losses in the second quarter and first six months of 2020 compared with net realized capital gains in the comparable 2019 periods primarily reflect impairment charges from write-downs of SORC oil field assets and, for the first six months of 2020, a $7.1 million realized loss as a result of an early redemption of certain senior notes as of January 15, 2020, partially offset by higher realized gains on our debt securities portfolio and a gain of $16.3 million recognized by Alleghany Capital on April 1, 2020 in connection with its acquisition of an additional 55 percent of Wilbert that it did not previously own, and its pre-existing approximately 45 percent equity ownership was remeasured at estimated fair value, or the “Wilbert Remeasurement Gain.” See Notes 3(e) and 11(a) to Notes to Unaudited Consolidated Financial Statements set forth in Part I, Item 1, “Financial Statements” of this Form 10-Q for additional information on the Wilbert Remeasurement Gain and this early redemption, respectively.

The change in allowance for credit losses on AFS securities in the first six months of 2020 reflects $14.4 million of unrealized losses on debt securities, primarily related to the energy sector and lower-quality corporate bonds in other sectors due to a significant decline in their fair value relative to their amortized cost.  The $14.4 million is net of a $17.0 million reduction of credit losses on AFS securities in the second quarter of 2020, arising primarily from improved bond market conditions and bond sales.  The change in allowance for credit losses on AFS securities in the first six months of 2019 reflect $10.0 million, primarily related to the energy sector and the deterioration of creditworthiness of the issuers.

A detailed comparison of investment results for the second quarter and first six months of 2020 and 2019 is contained in the following pages.

Noninsurance revenue and expenses. The following table presents our consolidated noninsurance revenue and expenses:

	Three Months Ended							Six Months Ended
	June 30,				Percent			June 30,				Percent
	2020		2019		Change			2020		2019		Change
	($ in millions)
Noninsurance revenue	$	492.7	$	603.9		(18.4	%)	$	960.6	$	1,118.0		(14.1	%)
Other operating expenses		510.3		581.5		(12.2	%)		977.0		1,083.9		(9.9	%)
Corporate administration		18.6		26.0		(28.5	%)		4.2		45.3		(90.7	%)
Amortization of intangible assets		12.1		8.8		37.5	%		21.7		15.7		38.2	%
Interest expense		22.2		25.1		(11.6	%)		40.6		48.7		(16.6	%)

Noninsurance revenue and Other operating expenses. Noninsurance revenue and other operating expenses primarily include sales and expenses associated with our Alleghany Capital segment. Other operating expenses also include the long-term incentive compensation of our reinsurance and insurance segments, which totaled $31.3 million and $23.6 million in the second quarter of 2020 and 2019, respectively, and $32.5 million and $50.5 million in the first six months of 2020 and 2019, respectively. The decrease in long-term incentive compensation accruals at our reinsurance and insurance segments in the first six months of 2020 from the first six months of 2019 primarily reflects the impact on expected payouts from the significant depreciation in the value of our equity portfolio compared with significant appreciation in the first six months of 2019 as well as poor underwriting results. Other operating expenses in the first six months of 2020 also include $4.7 million of increases in estimates of expected credit losses on commercial mortgage loans, reinsurance recoverables and premium balances receivable at our reinsurance and insurance segments.  This increase was based on current conditions and reasonable and supportable forecasts as of June 30, 2020, which include the impact of the Pandemic, as discussed above.  See Note 1(c), 3(i) and 4(b) to Notes to Unaudited Consolidated Financial Statements set forth in Part I, Item 1, “Financial Statements” of this Form 10-Q for additional detail on credit losses for these assets.

The decreases in noninsurance revenue and other operating expenses in the second quarter and first six months of 2020 from the comparable 2019 periods primarily reflect lower sales at Jazwares due primarily to unusually high sales in the first six months of 2019, and W&W|AFCO Steel due primarily to large construction project timing, partially offset by the impact of Wilbert’s April 1, 2020 inclusion in our consolidated results and the cost of Pandemic-related customer site closures and additional safety measures, all as further discussed below. The decrease in other operating expenses in the first six months of 2020 from the first six months of 2019 also reflects a decrease in long-term incentive compensation accruals at our reinsurance and insurance segments, partially offset by an increase in estimates of expected credit losses, all as discussed above.

Corporate administration. The decreases in corporate administration expense in the second quarter and first six months of 2020 from the comparable 2019 periods reflect significantly lower Alleghany parent company long-term incentive compensation accruals due primarily to the impacts of depreciation of Alleghany stock price and lower consolidated net earnings attributable to Alleghany stockholders, as discussed below.

Amortization of intangible assets. The increases in amortization expense in the second quarter and first six months of 2020 from the comparable 2019 periods primarily reflects recent acquisitions by Jazwares and PCT, as well as the impact of Wilbert’s April 1, 2020 inclusion in our consolidated results, as discussed below.

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Interest expense. The decreases in interest expense in the second quarter and first six months of 2020 from the comparable 2019 periods primarily reflect the impact of the early redemption of certain senior notes on January 15, 2020 and lower interest expenses at Alleghany Capital, partially offset by the issuance of certain senior notes on May 18, 2020. See Note 11(a) to Notes to Unaudited Consolidated Financial Statements set forth in Part I, Item 1, “Financial Statements” of this Form 10-Q for additional detail.

A detailed comparison of noninsurance revenue and expenses for the second quarter and first six months of 2020 and 2019 is contained in the following pages.

Income taxes. The following table presents our consolidated income tax expense:

	Three Months Ended							Six Months Ended
	June 30,				Percent			June 30,						Percent
	2020		2019		Change			2020			2019			Change
	($ in millions)
Income taxes	$	53.3	$	71.3		(25.2	%)	$	(51.4	)	$	179.9			(128.6	%)
Effective tax rate									21.7	%		19.5	%

The Coronavirus Aid, Relief and Economic Security Act, or the “CARES Act,” was signed into law on March 27, 2020.  Among other provisions, the CARES Act delayed certain employer payroll tax remittance deadlines and created or expanded certain income tax credits and loss carryback provisions and, as a result, we initially recorded a $6.9 million tax benefit that was subsequently reversed as of June 30, 2020 due to a change in our taxable earnings.

The lower income tax expense in the second quarter of 2020 from the second quarter of 2019 primarily reflects lower earnings before income taxes, as further discussed below.  The income tax benefit in the first six months of 2020 compared with the income tax expense in the first six months of 2019 reflects losses before income taxes compared with earnings before income taxes in such 2019 periods, as further discussed below.

The effective tax rate in the first six months of 2020 was calculated based on actual results through June 30, 2020 because management was not able to reliably estimate the annual effective tax rate in light of the significant losses incurred.  The increase in the effective tax rate in the first six months of 2020 from the first six months of 2019 primarily reflects higher foreign and state taxes and lower tax-exempt interest income and dividends-received deductions.

Net earnings. The following table presents our consolidated earnings:

	Three Months Ended								Six Months Ended
	June 30,					Percent			June 30,					Percent
	2020			2019		Change			2020			2019		Change
	($ in millions)
Earnings (losses) before income taxes	$	229.8		$	376.2		(38.9	%)	$	(236.4	)	$	932.6		(125.3	%)
Net (losses) earnings attributable to noncontrolling interests		(0.9	)		9.4		(109.6	%)		(1.2	)		17.0		(107.1	%)
Net earnings (losses) attributable to Alleghany stockholders		177.4			295.5		(40.0	%)		(183.8	)		735.7		(125.0	%)

The decreases in earnings before income taxes and net earnings attributable to Alleghany stockholders in the second quarter of 2020 from the second quarter of 2019, primarily reflect Pandemic-related catastrophe losses and, to a lesser extent, lower earnings at Alleghany Capital and impairment losses at SORC, partially offset by higher appreciation in the value of our equity securities portfolio, all as discussed above.  

The losses before income taxes and net losses attributable to Alleghany stockholders in the first six months of 2020 compared with earnings before income taxes and net earnings attributable to Alleghany stockholders in the first six months of 2019 primarily reflect the impact of significant depreciation in the value of our equity securities portfolio compared with significant appreciation in the first six months of 2019, as well as Pandemic-related catastrophe losses, all as discussed above

The net loss attributable to noncontrolling interests in the second quarter of 2020 compared with net earnings attributable to noncontrolling interests in the second quarter of 2019 and the decrease in net earnings attributable to noncontrolling interests in the first six months of 2020 from the first six months of 2019 primarily reflect the impact of lower overall earnings at Jazwares and, to a lesser extent, W&W|AFCO Steel, partially offset by acquisitions made by PCT, Kentucky Trailer, IPS and Jazwares in 2019 that increased noncontrolling interests.

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Reinsurance Segment Underwriting Results

The reinsurance segment is composed of TransRe’s property and casualty & other lines of business. TransRe writes a modest amount of property and casualty insurance business, which is included in the reinsurance segment. For a more detailed description of our reinsurance segment, see Part I, Item 1, “Business—Segment Information—Reinsurance Segment” of the 2019 Form 10-K.

The following tables present the underwriting results of the reinsurance segment:

Three Months Ended June 30, 2020	Property			Casualty & other(1)			Total
	($ in millions)
Gross premiums written	$	413.3		$	740.6		$	1,153.9
Net premiums written		355.8			730.7			1,086.5
Net premiums earned		328.7			742.3			1,071.0
Net loss and LAE:
Current year (excluding catastrophe losses)		197.8			515.8			713.6
Current year catastrophe losses		88.6			27.2			115.8
Prior years		(13.0	)		(38.2	)		(51.2	)
Total net loss and LAE		273.4			504.8			778.2
Commissions, brokerage and other underwriting expenses		96.8			226.3			323.1
Underwriting (loss) earnings(2)	$	(41.5	)	$	11.2		$	(30.3	)
Loss ratio(3):
Current year (excluding catastrophe losses)		60.2	%		69.5	%		66.7	%
Current year catastrophe losses		27.0	%		3.7	%		10.8	%
Prior years		(4.0	%)		(5.1	%)		(4.8	%)
Total net loss and LAE		83.2	%		68.1	%		72.7	%
Expense ratio(4)		29.4	%		30.5	%		30.2	%
Combined ratio(5)		112.6	%		98.6	%		102.9	%

Three Months Ended June 30, 2019	Property			Casualty & other(1)			Total
	($ in millions)
Gross premiums written	$	381.6		$	829.1		$	1,210.7
Net premiums written		305.9			807.0			1,112.9
Net premiums earned		303.2			771.7			1,074.9
Net loss and LAE:
Current year (excluding catastrophe losses)		152.4			537.5			689.9
Current year catastrophe losses		—			—			—
Prior years		(16.2	)		(28.6	)		(44.8	)
Total net loss and LAE		136.2			508.9			645.1
Commissions, brokerage and other underwriting expenses		103.8			250.1			353.9
Underwriting profit(2)	$	63.2		$	12.7		$	75.9
Loss ratio(3):
Current year (excluding catastrophe losses)		50.3	%		69.7	%		64.2	%
Current year catastrophe losses		—			—			—
Prior years		(5.3	%)		(3.7	%)		(4.2	%)
Total net loss and LAE		45.0	%		66.0	%		60.0	%
Expense ratio(4)		34.2	%		32.4	%		32.9	%
Combined ratio(5)		79.2	%		98.4	%		92.9	%

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Six Months Ended June 30, 2020	Property			Casualty & other(1)			Total
	($ in millions)
Gross premiums written	$	825.9		$	1,655.5		$	2,481.4
Net premiums written		668.7			1,628.8			2,297.5
Net premiums earned		650.1			1,554.0			2,204.1
Net loss and LAE:
Current year (excluding catastrophe losses)		372.5			1,088.8			1,461.3
Current year catastrophe losses		208.5			79.5			288.0
Prior years		(59.7	)		(49.2	)		(108.9	)
Total net loss and LAE		521.3			1,119.1			1,640.4
Commissions, brokerage and other underwriting expenses		202.2			470.7			672.9
Underwriting (loss)(2)	$	(73.4	)	$	(35.8	)	$	(109.2	)
Loss ratio(3):
Current year (excluding catastrophe losses)		57.3	%		70.1	%		66.2	%
Current year catastrophe losses		32.1	%		5.1	%		13.1	%
Prior years		(9.2	%)		(3.2	%)		(4.9	%)
Total net loss and LAE		80.2	%		72.0	%		74.4	%
Expense ratio(4)		31.1	%		30.3	%		30.5	%
Combined ratio(5)		111.3	%		102.3	%		104.9	%

Six Months Ended June 30, 2019	Property			Casualty & other(1)			Total
	($ in millions)
Gross premiums written	$	796.7		$	1,645.6		$	2,442.3
Net premiums written		622.1			1,598.4			2,220.5
Net premiums earned		612.1			1,492.0			2,104.1
Net loss and LAE:
Current year (excluding catastrophe losses)		325.7			1,053.8			1,379.5
Current year catastrophe losses		—			—			—
Prior years		(26.9	)		(54.3	)		(81.2	)
Total net loss and LAE		298.8			999.5			1,298.3
Commissions, brokerage and other underwriting expenses		207.5			482.4			689.9
Underwriting profit(2)	$	105.8		$	10.1		$	115.9
Loss ratio(3):
Current year (excluding catastrophe losses)		53.2	%		70.6	%		65.6	%
Current year catastrophe losses		—			—			—
Prior years		(4.4	%)		(3.6	%)		(3.9	%)
Total net loss and LAE		48.8	%		67.0	%		61.7	%
Expense ratio(4)		33.9	%		32.3	%		32.8	%
Combined ratio(5)		82.7	%		99.3	%		94.5	%

(1) Primarily consists of the following reinsurance lines of business: directors’ and officers’ liability; errors and omissions liability; general liability; medical malpractice; ocean marine and aviation; auto liability; accident and health; mortgage reinsurance; surety; and credit.

(2) Underwriting profit represents net premiums earned less net loss and LAE and commissions, brokerage and other underwriting expenses, all as determined in accordance with GAAP, and does not include net investment income, change in the fair value of equity securities, net realized capital gains, change in allowance for credit losses on available for sale securities, noninsurance revenue, other operating expenses, corporate administration, amortization of intangible assets and interest expense. Underwriting profit is a non-GAAP financial measure and does not replace earnings before income taxes determined in accordance with GAAP as a measure of profitability. See “Comment on Non-GAAP Financial Measures” herein for additional detail on the presentation of our results of operations.

(3) The loss ratio is derived by dividing the amount of net loss and LAE by net premiums earned, all as determined in accordance with GAAP.

42

(4) The expense ratio is derived by dividing the amount of commissions, brokerage and other underwriting expenses by net premiums earned, all as determined in accordance with GAAP.

(5) The combined ratio is the sum of the loss ratio and the expense ratio, all as determined in accordance with GAAP. The combined ratio represents the percentage of each premium dollar a reinsurance or an insurance company has to spend on net loss and LAE, and commissions, brokerage and other underwriting expenses.

Reinsurance Segment: Premiums. The following table presents premiums for the reinsurance segment:

	Three Months Ended							Six Months Ended
	June 30,				Percent			June 30,				Percent
	2020		2019		Change			2020		2019		Change
	($ in millions)
Property
Premiums written:
Gross premiums written	$	413.3	$	381.6		8.3	%	$	825.9	$	796.7		3.7	%
Net premiums written		355.8		305.9		16.3	%		668.7		622.1		7.5	%
Net premiums earned		328.7		303.2		8.4	%		650.1		612.1		6.2	%
Casualty & other
Premiums written:
Gross premiums written	$	740.6	$	829.1		(10.7	%)	$	1,655.5	$	1,645.6		0.6	%
Net premiums written		730.7		807.0		(9.5	%)		1,628.8		1,598.4		1.9	%
Net premiums earned		742.3		771.7		(3.8	%)		1,554.0		1,492.0		4.2	%
Total
Premiums written:
Gross premiums written	$	1,153.9	$	1,210.7		(4.7	%)	$	2,481.4	$	2,442.3		1.6	%
Net premiums written		1,086.5		1,112.9		(2.4	%)		2,297.5		2,220.5		3.5	%
Net premiums earned		1,071.0		1,074.9		(0.4	%)		2,204.1		2,104.1		4.8	%

Property. The increases in gross premiums written in the second quarter and first six months of 2020 from the comparable 2019 periods reflect growth in non-catastrophe property lines of business and generally improving rates, partially offset by a decreased participation in a large, global property treaty and the impact of recent share reductions and non-renewals of certain catastrophe-exposed business and property excess-of-loss business, as well as the impact of changes in foreign currency exchange rates. For the first six months of 2020, the increase also includes an increase in gross premiums written related to the Quota Share Treaty.  Gross premiums written related to the Quota Share Treaty were $54.7 million and $55.2 million in the second quarter of 2020 and 2019, respectively, and $127.0 million and $119.4 million in the first six months of 2020 and 2019, respectively. Excluding the impact of changes in foreign currency exchange rates, gross premiums written increased by 9.0 percent in the second quarter of 2020 from the second quarter of 2019, and increased 4.3 percent in the first six months of 2020 from the first six months of 2019.

The increases in net premiums earned in the second quarter and first six months of 2020 from the comparable 2019 periods primarily reflect the impact of higher gross premiums written and lower ceded premiums written in recent quarters, partially offset by the impact of changes in foreign currency exchange rates. Excluding the impact of changes in foreign currency exchange rates, net premiums earned increased by 9.2 percent in the second quarter of 2020 from the second quarter of 2019, and increased 6.9 percent in the first six months of 2020 from the first six months of 2019.

Casualty & other. The decrease in gross premiums written in the second quarter of 2020 from the second quarter of 2019 primarily reflects automobile-related premium rebates at our cedants in reaction to a Pandemic-driven reduction in personal and commercial automobile usage worldwide and, to a lesser extent, decreases in the guaranty lines of business and the impact of foreign currency exchange rates, partially offset by growth in the professional liability and medical malpractice lines of business and generally improving rates.  The increase in gross premiums written in the first six months of 2020 from the first six months of 2019 primarily reflects higher premiums written in most lines of business, including general liability, professional liability and umbrella lines of business, and generally improving rates, partially offset by a decrease in premiums written related to the above-noted automobile-related premium rebates and, to a lesser extent, decreases in the guaranty lines of business and the impact of foreign currency exchange rates.  The reduction in the gross premiums written in the personal automobile lines of business in the U.S. also impacted the Quota Share Treaty. Gross premiums written related to the Quota Share Treaty were $85.6 million and $108.5 million in the second quarter of 2020 and 2019, respectively, and $182.5 million and $208.3 million in the first six months of 2020 and 2019, respectively. Excluding the impact of changes in foreign currency exchange rates, gross premiums written decreased by 10.5 percent in the second quarter of 2020 from the second quarter of 2019, and increased 0.9 percent in the first six months of 2020 from the first six months of 2019.

43

The decrease in net premiums earned in the second quarter of 2020 from the second quarter of 2019 primarily reflects the impact of lower gross premiums written in the current quarter, partially offset by the impact of changes in foreign currency exchange rates. The increase in net premiums earned in the first six months of 2020 from the first six months of 2019 primarily reflects the impact of higher gross premiums written in earlier quarters, partially offset by the impact of changes in foreign currency exchange rates. Excluding the impact of changes in foreign currency exchange rates, net premiums earned decreased by 3.6 percent in the second quarter of 2020 from the second quarter of 2019, and increased 4.5 percent in the first six months of 2020 from the first six months of 2019.

Reinsurance Segment: Net loss and LAE. The following table presents net loss and LAE for the reinsurance segment:

	Three Months Ended									Six Months Ended
	June 30,						Percent			June 30,						Percent
	2020			2019			Change			2020			2019			Change
	($ in millions)
Property
Net loss and LAE:
Current year (excluding catastrophe losses)	$	197.8		$	152.4			29.8	%	$	372.5		$	325.7			14.4	%
Current year catastrophe losses		88.6			—			—			208.5			—			—
Prior years		(13.0	)		(16.2	)		(19.8	%)		(59.7	)		(26.9	)		121.9	%
Total net loss and LAE	$	273.4		$	136.2			100.7	%	$	521.3		$	298.8			74.5	%
Loss ratio:
Current year (excluding catastrophe losses)		60.2	%		50.3	%					57.3	%		53.2	%
Current year catastrophe losses		27.0	%		—						32.1	%		—
Prior years		(4.0	%)		(5.3	%)					(9.2	%)		(4.4	%)
Total net loss and LAE		83.2	%		45.0	%					80.2	%		48.8	%
Casualty & other
Net loss and LAE:
Current year (excluding catastrophe losses)	$	515.8		$	537.5			(4.0	%)	$	1,088.8		$	1,053.8			3.3	%
Current year catastrophe losses		27.2			—			—			79.5			—			—
Prior years		(38.2	)		(28.6	)		33.6	%		(49.2	)		(54.3	)		(9.4	%)
Total net loss and LAE	$	504.8		$	508.9			(0.8	%)	$	1,119.1		$	999.5			12.0	%
Loss ratio:
Current year (excluding catastrophe losses)		69.5	%		69.7	%					70.1	%		70.6	%
Current year catastrophe losses		3.7	%		—						5.1	%		—
Prior years		(5.1	%)		(3.7	%)					(3.2	%)		(3.6	%)
Total net loss and LAE		68.1	%		66.0	%					72.0	%		67.0	%
Total
Net loss and LAE:
Current year (excluding catastrophe losses)	$	713.6		$	689.9			3.4	%	$	1,461.3		$	1,379.5			5.9	%
Current year catastrophe losses		115.8			—			—			288.0			—			—
Prior years		(51.2	)		(44.8	)		14.3	%		(108.9	)		(81.2	)		34.1	%
Total net loss and LAE	$	778.2		$	645.1			20.6	%	$	1,640.4		$	1,298.3			26.3	%
Loss ratio:
Current year (excluding catastrophe losses)		66.7	%		64.2	%					66.2	%		65.6	%
Current year catastrophe losses		10.8	%		—						13.1	%		—
Prior years		(4.8	%)		(4.2	%)					(4.9	%)		(3.9	%)
Total net loss and LAE		72.7	%		60.0	%					74.4	%		61.7	%

Property. The increases in net loss and LAE in the second quarter and first six months of 2020 from the comparable 2019 periods primarily reflect significant catastrophe losses and, to a lesser extent, higher non-catastrophe losses.  For the first six months of 2020, the increase was partially offset by higher favorable prior accident year loss reserve development. Catastrophe losses in the second quarter of 2020 primarily include $87.8 million of Pandemic-related catastrophe losses, as discussed above. Catastrophe losses in the first six months of 2020 consisted of $188.4 million of Pandemic-related catastrophe losses, as discussed above, and $20.1 million from an earthquake in Puerto Rico.

44

Net loss and LAE in the second quarter and first six months of 2020 and 2019 include (favorable) unfavorable prior accident year loss reserve development as presented in the table below:

	Three Months Ended								Six Months Ended
	June 30,								June 30,
	2020				2019				2020				2019
	($ in millions)
Catastrophe events	$	0.5			$	(9.9	)	(1)	$	(31.9	)	(2)	$	(1.5	)	(3)
Non-catastrophe		(13.5	)	(4)		(6.3	)	(5)		(27.8	)	(4)		(25.4	)	(6)
Total	$	(13.0	)		$	(16.2	)		$	(59.7	)		$	(26.9	)

(1) Primarily reflects favorable prior accident year loss reserve development related to wildfires in California in the 2018 accident year.

(2) Primarily reflects favorable prior accident year loss reserve development related to Typhoon Hagibis in the 2019 accident year and, to a lesser extent, catastrophic events in the 2018 accident year.

(3) Primarily reflects favorable prior accident year loss reserve development related to wildfires in California in the 2018 accident year, partially offset by unfavorable prior accident year loss reserve development related to Typhoon Jebi in the 2018 accident year.

(4) Primarily reflects favorable prior accident year loss reserve development in the 2017 and 2019 accident years.

(5) Primarily reflects favorable prior accident year loss reserve development in the 2018 accident year.

(6) Primarily reflects favorable prior accident year loss reserve development in the 2016 and 2018 accident years.

The favorable prior accident year loss reserve development in the second quarter and first six months of 2020 reflects favorable loss emergence compared with loss emergence patterns assumed in prior periods. The favorable prior accident year loss reserve development in the first six months of 2020 did not impact assumptions used in estimating TransRe’s loss and LAE liabilities for business earned in the first six months of 2020.

Casualty & other. The slight decrease in net loss and LAE in the second quarter of 2020 from the second quarter of 2019 primarily reflects the impact of higher favorable prior accident year loss development, partially offset by Pandemic-related catastrophe losses. The increase in net loss and LAE in the first six months of 2020 from the first six months of 2019 primarily reflects Pandemic-related catastrophe losses and, to a lesser extent, the impact of higher net premiums earned. Pandemic-related catastrophe losses totaled $27.1 million and $79.4 million in the second quarter and first six months of 2020, respectively.

Net loss and LAE in the second quarter and first six months of 2020 and 2019 include (favorable) unfavorable prior accident year loss reserve development as presented in the table below:

	Three Months Ended								Six Months Ended
	June 30,								June 30,
	2020				2019				2020				2019
	($ in millions)
Malpractice Treaties(1)	$	—			$	(1.4	)		$	—			$	(1.4	)
Catastrophe events		(3.8	)			0.7				(2.4	)			(0.5	)
Other		(34.4	)	(2)		(27.9	)	(3)		(46.8	)	(4)		(52.4	)	(5)
Total	$	(38.2	)		$	(28.6	)		$	(49.2	)		$	(54.3	)

(1) Represents certain malpractice treaties pursuant to which the increased underwriting profits created by the favorable prior accident year loss reserve development are largely retained by the cedants. As a result, the favorable prior accident year loss reserve development is largely offset by an increase in profit commission expense incurred when such favorable prior accident year loss reserve development occurs.

(2) Primarily reflects favorable prior accident year loss reserve development in the longer-tailed lines of business in the 2016 and earlier accident years and in the shorter-tailed lines of business in the 2017 accident year, partially offset by unfavorable prior accident year development in the shorter-tailed lines of business in the 2018 and 2019 accident years.

(3) Primarily reflects favorable prior accident year loss reserve development in the longer-tailed lines of business in the 2013 and prior accident years.

(4) Primarily reflects favorable prior accident year loss reserve development in the longer-tailed lines of business in the 2013 and earlier accident years, and in the shorter-tailed lines of business in the 2017 accident year, partially offset by unfavorable prior accident year development in the shorter-tailed lines of business in the 2014 through 2016, 2018 and 2019 accident years.

(5) Primarily reflects favorable prior accident year loss reserve development in the longer-tailed lines of business in the 2013 and prior accident years and the shorter-tailed lines of business in the 2012 through 2014 accident years.

The favorable prior accident year loss reserve development in the second quarter and first six months of 2020 reflects favorable loss emergence compared with loss emergence patterns assumed in prior periods. The favorable prior accident year loss reserve development in the first six months of 2020 did not impact assumptions used in estimating TransRe’s loss and LAE liabilities for business earned in the first six months of 2020.

45

Reinsurance Segment: Commissions, brokerage and other underwriting expenses. The following table presents commissions, brokerage and other underwriting expenses for the reinsurance segment:

	Three Months Ended									Six Months Ended
	June 30,						Percent			June 30,						Percent
	2020			2019			Change			2020			2019			Change
	($ in millions)
Property
Commissions, brokerage and other underwriting expenses	$	96.8		$	103.8			(6.7	%)	$	202.2		$	207.5			(2.6	%)
Expense ratio		29.4	%		34.2	%					31.1	%		33.9	%
Casualty & other
Commissions, brokerage and other underwriting expenses	$	226.3		$	250.1			(9.5	%)	$	470.7		$	482.4			(2.4	%)
Expense ratio		30.5	%		32.4	%					30.3	%		32.3	%
Total
Commissions, brokerage and other underwriting expenses	$	323.1		$	353.9			(8.7	%)	$	672.9		$	689.9			(2.5	%)
Expense ratio		30.2	%		32.9	%					30.5	%		32.8	%

Property. The decreases in commissions, brokerage and other underwriting expenses in the second quarter and first six months of 2020 from the comparable 2019 periods primarily reflect lower overall commission rates, lower annual incentive compensation accruals and a Pandemic-driven reduction in travel and entertainment costs, partially offset by the impact of higher net premiums earned, as discussed above.

Casualty & other. The decreases in commissions, brokerage and other underwriting expenses in the second quarter and first six months of 2020 from the comparable 2019 periods primarily reflect lower overall commission rates, lower annual incentive compensation accruals and a Pandemic-driven reduction in travel and entertainment costs.  The decrease in commissions, brokerage and other underwriting expenses for the first six months of 2020 was partially offset by the impact of higher net premiums earned, as discussed above.

Reinsurance Segment: Underwriting profit. The following table presents underwriting profit (loss) for the reinsurance segment:

	Three Months Ended									Six Months Ended
	June 30,						Percent			June 30,						Percent
	2020			2019			Change			2020			2019			Change
	($ in millions)
Property
Underwriting (loss) profit	$	(41.5	)	$	63.2			(165.7	%)	$	(73.4	)	$	105.8			(169.4	%)
Combined ratio		112.6	%		79.2	%					111.3	%		82.7	%
Casualty & other
Underwriting profit (loss)	$	11.2		$	12.7			(11.8	%)	$	(35.8	)	$	10.1			(454.5	%)
Combined ratio		98.6	%		98.4	%					102.3	%		99.3	%
Total
Underwriting (loss) profit	$	(30.3	)	$	75.9			(139.9	%)	$	(109.2	)	$	115.9			(194.2	%)
Combined ratio		102.9	%		92.9	%					104.9	%		94.5	%

Property. The underwriting losses in the second quarter and first six months of 2020 compared with the underwriting profit in the comparable 2019 periods primarily reflect significantly higher catastrophe losses, primarily related to the Pandemic, as discussed above.

46

Casualty & other. The slight decrease in underwriting profit in the in the second quarter of 2020 from the second quarter of 2019, and the underwriting loss in the first six months of 2020 compared with the underwriting profit in the first six months of 2019 primarily reflect casualty-related Pandemic catastrophe losses, as discussed above.

Insurance Segment Underwriting Results

The insurance segment is composed of AIHL’s RSUI and CapSpecialty operating subsidiaries. RSUI also writes a modest amount of assumed reinsurance business, which is included in the insurance segment. For a more detailed description of our insurance segment, see Part I, Item 1, “Business—Segment Information—Insurance Segment” of the 2019 Form 10-K.

The underwriting results of the insurance segment are presented below:

Three Months Ended June 30, 2020	RSUI			CapSpecialty			Total
	($ in millions)
Gross premiums written	$	474.7		$	101.2		$	575.9
Net premiums written		300.0			91.5			391.5
Net premiums earned		241.5			82.4			323.9
Net loss and LAE:
Current year (excluding catastrophe losses)		131.9			49.0			180.9
Current year catastrophe losses		47.6			1.2			48.8
Prior years		16.5			—			16.5
Total net loss and LAE		196.0			50.2			246.2
Commissions, brokerage and other underwriting expenses		52.7			34.2			86.9
Underwriting (loss)(1)	$	(7.2	)	$	(2.0	)	$	(9.2	)
Loss ratio(2):
Current year (excluding catastrophe losses)		54.6	%		59.5	%		55.8	%
Current year catastrophe losses		19.7	%		1.5	%		15.1	%
Prior years		6.8	%		(—	%)		5.1	%
Total net loss and LAE		81.1	%		61.0	%		76.0	%
Expense ratio(3)		21.8	%		41.5	%		26.8	%
Combined ratio(4)		102.9	%		102.5	%		102.8	%

Three Months Ended June 30, 2019	RSUI			CapSpecialty			Total
	($ in millions)
Gross premiums written	$	372.4		$	93.8		$	466.2
Net premiums written		246.9			86.7			333.6
Net premiums earned		202.4			78.7			281.1
Net loss and LAE:
Current year (excluding catastrophe losses)		102.4			44.8			147.2
Current year catastrophe losses		15.7			0.6			16.3
Prior years		(12.5	)		0.7			(11.8	)
Total net loss and LAE		105.6			46.1			151.7
Commissions, brokerage and other underwriting expenses		57.9			32.5			90.4
Underwriting profit(1)	$	38.9		$	0.1		$	39.0
Loss ratio(2):
Current year (excluding catastrophe losses)		50.6	%		56.9	%		52.4	%
Current year catastrophe losses		7.8	%		0.7	%		5.8	%
Prior years		(6.2	%)		1.0	%		(4.2	%)
Total net loss and LAE		52.2	%		58.6	%		54.0	%
Expense ratio(3)		28.6	%		41.3	%		32.2	%
Combined ratio(4)		80.8	%		99.9	%		86.2	%

47

Six Months Ended June 30, 2020	RSUI			CapSpecialty			Total
	($ in millions)
Gross premiums written	$	840.6		$	186.7		$	1,027.3
Net premiums written		544.5			169.7			714.2
Net premiums earned		470.9			164.3			635.2
Net loss and LAE:
Current year (excluding catastrophe losses)		240.0			98.0			338.0
Current year catastrophe losses		56.9			1.3			58.2
Prior years		15.0			0.2			15.2
Total net loss and LAE		311.9			99.5			411.4
Commissions, brokerage and other underwriting expenses		110.6			67.9			178.5
Underwriting profit (loss)(1)	$	48.4		$	(3.1	)	$	45.3
Loss ratio(2):
Current year (excluding catastrophe losses)		50.9	%		59.6	%		53.2	%
Current year catastrophe losses		12.1	%		0.8	%		9.2	%
Prior years		3.2	%		0.1	%		2.4	%
Total net loss and LAE		66.2	%		60.5	%		64.8	%
Expense ratio(3)		23.5	%		41.3	%		28.1	%
Combined ratio(4)		89.7	%		101.8	%		92.9	%

Six Months Ended June 30, 2019	RSUI			CapSpecialty			Total
	($ in millions)
Gross premiums written	$	671.4		$	176.6		$	848.0
Net premiums written		448.3			163.3			611.6
Net premiums earned		394.8			154.4			549.2
Net loss and LAE:
Current year (excluding catastrophe losses)		197.3			86.9			284.2
Current year catastrophe losses		18.8			0.8			19.6
Prior years		(16.2	)		3.4			(12.8	)
Total net loss and LAE		199.9			91.1			291.0
Commissions, brokerage and other underwriting expenses		111.4			63.1			174.5
Underwriting profit(1)	$	83.5		$	0.2		$	83.7
Loss ratio(2):
Current year (excluding catastrophe losses)		49.9	%		56.3	%		51.7	%
Current year catastrophe losses		4.8	%		0.5	%		3.6	%
Prior years		(4.1	%)		2.2	%		(2.3	%)
Total net loss and LAE		50.6	%		59.0	%		53.0	%
Expense ratio(3)		28.2	%		40.8	%		31.8	%
Combined ratio(4)		78.8	%		99.8	%		84.9	%

(1) Underwriting profit represents net premiums earned less net loss and LAE and commissions, brokerage and other underwriting expenses, all as determined in accordance with GAAP, and does not include net investment income, change in the fair value of equity securities, net realized capital gains, change in allowance for credit losses on available for sale securities, noninsurance revenue, other operating expenses, corporate administration, amortization of intangible assets and interest expense. Underwriting profit is a non-GAAP financial measure and does not replace earnings before income taxes determined in accordance with GAAP as a measure of profitability. See “Comment on Non-GAAP Financial Measures” herein for additional detail on the presentation of our results of operations.

(2) The loss ratio is derived by dividing the amount of net loss and LAE by net premiums earned, all as determined in accordance with GAAP.

(3) The expense ratio is derived by dividing the amount of commissions, brokerage and other underwriting expenses by net premiums earned, all as determined in accordance with GAAP.

(4) The combined ratio is the sum of the loss ratio and the expense ratio, all as determined in accordance with GAAP. The combined ratio represents the percentage of each premium dollar a reinsurance or an insurance company has to spend on net loss and LAE, and commissions, brokerage and other underwriting expenses.

48

Insurance Segment: Premiums. The following table presents premiums for the insurance segment:

	Three Months Ended							Six Months Ended
	June 30,				Percent			June 30,				Percent
	2020		2019		Change			2020		2019		Change
	($ in millions)
RSUI
Premiums written:
Gross premiums written	$	474.7	$	372.4		27.5	%	$	840.6	$	671.4		25.2	%
Net premiums written		300.0		246.9		21.5	%		544.5		448.3		21.5	%
Net premiums earned		241.5		202.4		19.3	%		470.9		394.8		19.3	%
CapSpecialty
Premiums written:
Gross premiums written	$	101.2	$	93.8		7.9	%	$	186.7	$	176.6		5.7	%
Net premiums written		91.5		86.7		5.5	%		169.7		163.3		3.9	%
Net premiums earned		82.4		78.7		4.7	%		164.3		154.4		6.4	%
Total
Premiums written:
Gross premiums written	$	575.9	$	466.2		23.5	%	$	1,027.3	$	848.0		21.1	%
Net premiums written		391.5		333.6		17.4	%		714.2		611.6		16.8	%
Net premiums earned		323.9		281.1		15.2	%		635.2		549.2		15.7	%

RSUI. The increases in gross premiums written in the second quarter and first six months of 2020 from the comparable 2019 periods primarily reflect growth in most lines of business due to increases in business opportunities, higher rates and improved general market conditions, particularly in the property, directors’ and officers’ liability and umbrella/excess lines of business.

The increases in net premiums earned in the second quarter and first six months of 2020 from the comparable 2019 periods primarily reflect increases in gross premiums written in recent quarters, partially offset by higher ceded premiums earned related to the growth in the heavily-reinsured property lines of business.

CapSpecialty. The increases in gross premiums written in the second quarter and first six months of 2020 from the comparable 2019 periods primarily reflect growth in the professional liability lines of business, due to increases in business opportunities, CapSpecialty’s expanded product offerings and the impact of CapSpecialty’s purchase in September 2019 of certain renewal rights to a small lawyer’s professional liability block of business, partially offset by a curtailment of certain unprofitable broker relationships.

The increases in net premiums earned in the second quarter and first six months of 2020 from the comparable 2019 periods primarily reflect increases in gross premiums written in recent quarters.

49

Insurance Segment: Net loss and LAE. The following table presents net loss and LAE for the insurance segment:

	Three Months Ended									Six Months Ended
	June 30,						Percent			June 30,						Percent
	2020			2019			Change			2020			2019			Change
	($ in millions)
RSUI
Net loss and LAE:
Current year (excluding catastrophe losses)	$	131.9		$	102.4			28.8	%	$	240.0		$	197.3			21.6	%
Current year catastrophe losses		47.6			15.7			203.2	%		56.9			18.8			202.7	%
Prior years		16.5			(12.5	)		(232.0	%)		15.0			(16.2	)		(192.6	%)
Total net loss and LAE	$	196.0		$	105.6			85.6	%	$	311.9		$	199.9			56.0	%
Loss ratio:
Current year (excluding catastrophe losses)		54.6	%		50.6	%					50.9	%		49.9	%
Current year catastrophe losses		19.7	%		7.8	%					12.1	%		4.8	%
Prior years		6.8	%		(6.2	%)					3.2	%		(4.1	%)
Total net loss and LAE		81.1	%		52.2	%					66.2	%		50.6	%
CapSpecialty
Net loss and LAE:
Current year (excluding catastrophe losses)	$	49.0		$	44.8			9.4	%	$	98.0		$	86.9			12.8	%
Current year catastrophe losses		1.2			0.6			100.0	%		1.3			0.8			62.5	%
Prior years		—			0.7			(100.0	%)		0.2			3.4			(94.1	%)
Total net loss and LAE	$	50.2		$	46.1			8.9	%	$	99.5		$	91.1			9.2	%
Loss ratio:
Current year (excluding catastrophe losses)		59.5	%		56.9	%					59.6	%		56.3	%
Current year catastrophe losses		1.5	%		0.7	%					0.8	%		0.5	%
Prior years		(—	%)		1.0	%					0.1	%		2.3	%
Total net loss and LAE		61.0	%		58.6	%					60.5	%		59.0	%
Total
Net loss and LAE:
Current year (excluding catastrophe losses)	$	180.9		$	147.2			22.9	%	$	338.0		$	284.2			18.9	%
Current year catastrophe losses		48.8			16.3			199.4	%		58.2			19.6			196.9	%
Prior years		16.5			(11.8	)		(239.8	%)		15.2			(12.8	)		(218.8	%)
Total net loss and LAE	$	246.2		$	151.7			62.3	%	$	411.4		$	291.0			41.4	%
Loss ratio:
Current year (excluding catastrophe losses)		55.9	%		52.4	%					53.2	%		51.7	%
Current year catastrophe losses		15.1	%		5.8	%					9.2	%		3.6	%
Prior years		5.1	%		(4.2	%)					2.4	%		(2.3	%)
Total net loss and LAE		76.0	%		54.0	%					64.8	%		53.0	%

RSUI. The increases in net loss and LAE in the second quarter and first six months of 2020 from the comparable 2019 periods primarily reflect the impact of higher net premiums earned, unfavorable prior accident year loss reserve development compared with favorable prior accident year loss reserve development in the comparable 2019 periods, and higher catastrophe losses. Unfavorable prior accident year loss reserve development in the second quarter and first six months of 2020 is due to the professional liability lines of business in the 2017, 2018 and 2019 accident years, partially offset by favorable prior accident year loss reserve development in certain other liability lines of business.

Catastrophe losses in the second quarter and first six months of 2020 include $20.3 million of Pandemic losses, which primarily relate to business interruption and related estimated legal expenses.  The remaining catastrophe losses relate primarily to severe weather and flooding in the Southeastern U.S. and a tornado in Tennessee. Catastrophe losses in the second quarter and first six months of 2019 primarily relate to severe weather and flooding in the Midwestern U.S.

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Net loss and LAE in the second quarter and first six months of 2020 and 2019 include (favorable) unfavorable prior accident year loss reserve development as presented in the table below:

	Three Months Ended							Six Months Ended
	June 30,							June 30,
	2020			2019				2020				2019
	($ in millions)
Casualty	$	16.5	(1)	$	(12.1	)	(2)	$	15.5		(1)	$	(17.7	)	(2)
Property and other		—			(0.4	)			(0.5	)			1.5		(3)
Total	$	16.5		$	(12.5	)		$	15.0			$	(16.2	)

(1) Primarily reflects unfavorable prior accident year loss reserve development in the professional liability lines of business in the 2017, 2018 and 2019 accident years, partially offset by favorable prior accident year loss reserve development in the directors’ and officers’ liability and umbrella/excess lines of business in the 2011 through 2015 accident years.

(2) Primarily reflects favorable prior accident year loss reserve development in the directors’ and officers’ liability and umbrella/excess lines of business in the 2011 through 2015 accident years, partially offset by unfavorable prior accident year loss reserve development in the professional liability lines of business in recent accident years.

(3) Primarily reflects unfavorable prior accident year loss reserve development related to the assumed property reinsurance lines of business from catastrophe losses in recent accident years, partially offset by favorable prior accident year loss reserve development related to Superstorm Sandy in the 2012 accident year and by Hurricane Harvey in the 2017 accident year.

The unfavorable prior accident year loss reserve development in the second quarter and first six months of 2020 reflect unfavorable loss emergence compared with loss emergence patterns assumed in prior periods. The unfavorable prior accident year loss reserve development in the first six months of 2020 did not impact assumptions used in estimating RSUI’s loss and LAE liabilities for business earned in the first six months of 2020.

CapSpecialty. The increases in net loss and LAE in the second quarter and first six months of 2020 from the comparable 2019 periods primarily reflect the impact of higher net premiums earned and higher current accident year losses, partially offset by unfavorable prior accident year loss reserve development in the 2019 periods.

Net loss and LAE in the second quarter of 2019 includes unfavorable prior accident year loss reserve development primarily related to the professional liability lines of business in the 2016 accident year. Net loss and LAE in the first six months of 2019 also include unfavorable prior accident year loss reserve development in certain specialty lines of business written through a program administrator in connection with a terminated program in the 2009 and 2010 accident years.

Insurance Segment: Commissions, brokerage and other underwriting expenses. The following table presents commissions, brokerage and other underwriting expenses for the insurance segment:

	Three Months Ended									Six Months Ended
	June 30,						Percent			June 30,						Percent
	2020			2019			Change			2020			2019			Change
	($ in millions)
RSUI
Commissions, brokerage and other underwriting expenses	$	52.7		$	57.9			(9.0	%)	$	110.6		$	111.4			(0.7	%)
Expense ratio		21.8	%		28.6	%					23.5	%		28.2	%
CapSpecialty
Commissions, brokerage and other underwriting expenses	$	34.2		$	32.5			5.2	%	$	67.9		$	63.1			7.6	%
Expense ratio		41.5	%		41.3	%					41.3	%		40.8	%
Total
Commissions, brokerage and other underwriting expenses	$	86.9		$	90.4			(3.9	%)	$	178.5		$	174.5			2.3	%
Expense ratio		26.8	%		32.2	%					28.1	%		31.8	%

RSUI. The decreases in commissions, brokerage and other underwriting expenses in the second quarter and first six months of 2020 from the comparable 2019 periods primarily reflect lower overall commission rates, lower annual incentive compensation accruals and a Pandemic-driven reduction in travel and entertainment costs, partially offset by the impact of higher net premiums earned, as discussed above.

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CapSpecialty. The increases in commissions, brokerage and other underwriting expenses in the second quarter and first six months of 2020 from the comparable 2019 periods primarily reflect the impact of higher net premiums earned and investments in technology.

Insurance Segment: Underwriting profit. The following table presents our underwriting profit (loss) for the insurance segment:

	Three Months Ended									Six Months Ended
	June 30,						Percent			June 30,						Percent
	2020			2019			Change			2020			2019			Change
	($ in millions)
RSUI
Underwriting (loss) profit	$	(7.2	)	$	38.9			(118.5	%)	$	48.4		$	83.5			(42.0	%)
Combined ratio		102.9	%		80.8	%					89.7	%		78.8	%
CapSpecialty
Underwriting (loss) profit	$	(2.0	)	$	0.1			(2,100.0	%)	$	(3.1	)	$	0.2			(1,650.0	%)
Combined ratio		102.5	%		99.9	%					101.8	%		99.8	%
Total
Underwriting (loss) profit	$	(9.2	)	$	39.0			(123.6	%)	$	45.3		$	83.7			(45.9	%)
Combined ratio		102.8	%		86.2	%					92.9	%		84.8	%

RSUI. The underwriting loss in the second quarter of 2020 compared with the underwriting profit in the second quarter of 2019 and the decrease in underwriting profit in first six months of 2020 from the first six months of 2019, primarily reflect higher catastrophe losses and significant net unfavorable prior accident year loss reserve development in the professional liability lines of business, partially offset by the impact of higher net premiums earned and lower commissions, brokerage and other underwriting expenses, all as discussed above.

CapSpecialty. The underwriting losses in the second quarter and first six months of 2020 compared with the underwriting profits in the second quarter and first six months of 2019 primarily reflect higher current accident year losses and, to a lesser extent, higher commissions, brokerage and other underwriting expenses, partially offset by unfavorable prior accident year loss reserve development in the 2019 periods, all as discussed above.

Investment Results for the Reinsurance and Insurance Segments

The following table presents the investment results for our reinsurance and insurance segments:

	Three Months Ended								Six Months Ended
	June 30,					Percent			June 30,						Percent
	2020			2019		Change			2020			2019			Change
	($ in millions)
Net investment income	$	115.4		$	138.3		(16.6	%)	$	225.0		$	256.3			(12.2	%)
Change in the fair value of equity securities		242.2			143.3		69.0	%		(279.4	)		532.4			(152.5	%)
Net realized capital gains		(10.1	)		12.2		(182.8	%)		35.1			16.2			116.7	%
Change in allowance for credit losses on available for sale securities		16.6			—		(—	%)		(14.1	)		(10.0	)		41.0	%

Net investment income. The decreases in net investment income in the second quarter and first six months of 2020 from the comparable 2019 periods primarily reflect decreases in interest income arising from the impact of low reinvestment yields on debt securities and lower yields on short term investments and floating-rate debt securities.  To a lesser extent, the decreases in net investment income reflect lower dividend income from reductions in our equity security portfolio and, for the first six months of 2020, lower partnership income due to the impact of the Pandemic on lower-quality debt securities held by certain of our investment partnerships.

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Change in the fair value of equity securities. The changes in the fair value of equity securities in the first six months of 2020 reflect depreciation in the value of our equity securities portfolio due primarily to the impact of the Pandemic and related economic and financial market disruptions, as discussed above. The change in the fair value of equity securities in the second quarter of 2020 reflects a partial recovery of the equity markets and our equity securities portfolio, as concerns about the Pandemic moderated.  The changes in the fair value of equity securities in the second quarter and first six months of 2019 reflect appreciation in the value of our equity securities portfolio, primarily from our holdings in the technology, industrial and financial sectors.

Net realized capital gains. The net realized loss in the second quarter compared with net realized capital gains in the second quarter of 2019 primarily reflects losses realized from the sale of our debt securities. The higher net realized capital gains in the first six months of 2020 from the first six months of 2019 primarily reflects significant gains realized from the sale of our debt securities earlier in 2020.

Change in allowance for credit losses on available for sale securities. The change in allowance for credit losses on AFS securities in the first six months of 2020 reflect $14.1 million of unrealized losses on debt securities, primarily related to the energy sector and lower-quality corporate bonds in other sectors due to a significant decline in their fair value relative to their amortized cost.  The $14.1 million is net of a $16.6 million reduction of credit losses on AFS securities in the second quarter of 2020, arising primarily from improved bond market conditions and bond sales.  The change in allowance for credit losses on AFS securities in the first six months of 2019 reflect $10.0 million, primarily related to the energy sector and the deterioration of creditworthiness of the issuers.

See Note 3 to Notes to Unaudited Consolidated Financial Statements set forth in Part I, Item 1, “Financial Statements” of this Form 10-Q for additional detail on credit losses, credit quality and gross unrealized investment losses for debt securities as of and for the three and six months ended June 30, 2020.

Alleghany Capital Segment Results

The Alleghany Capital segment consists of: (i) industrial operations conducted through PCT, Kentucky Trailer, W&W|AFCO Steel and Wilbert; (ii) non-industrial operations conducted through IPS, Jazwares and Concord; and (iii) corporate operations at the Alleghany Capital level, which include certain hotel development projects. On April 1, 2020, Alleghany Capital acquired an additional approximately 55 percent of Wilbert it previously did not own, bringing its equity interest in Wilbert to approximately 100 percent, and as of that date, the results of Wilbert were included in our consolidated results. Prior to April 1, 2020, Wilbert was accounted for under the equity method of accounting and was included in other assets.

The following table presents the results of the Alleghany Capital segment for the three and six months ended June 30, 2020 and 2019:

	Three Months Ended June 30, 2020												Three Months Ended June 30, 2019
	Industrial			Non- industrial			Corp. & other			Total			Industrial			Non- industrial			Corp. & other			Total
	($ in millions)
Noninsurance revenue(1)	$	280.6		$	202.6		$	—		$	483.2		$	318.3		$	275.1		$	0.3		$	593.7
Net investment income		—			—			—			—			1.4			(0.2	)		(0.3	)		0.9
Net realized capital gains		0.1			—			16.3			16.4			0.2			—			—			0.2
Total revenues	$	280.7		$	202.6		$	16.3		$	499.6		$	319.9		$	274.9		$	—		$	594.8
Other operating expenses(1)		271.5			197.9			4.2			473.6			290.0			252.2			6.1			548.3
Amortization of intangible assets		4.0			7.9			—			11.9			3.9			4.5			—			8.4
Interest expense		2.5			1.7			0.1			4.3			3.1			1.6			—			4.7
Earnings (losses) before income taxes	$	2.7		$	(4.9	)	$	12.0		$	9.8		$	22.9		$	16.6		$	(6.1	)	$	33.4
Earnings (losses) before income taxes	$	2.7		$	(4.9	)	$	12.0		$	9.8		$	22.9		$	16.6		$	(6.1	)	$	33.4
Less: net realized capital gains		(0.1	)		—			(16.3	)		(16.4	)		(0.2	)		—			—			(0.2	)
Add: amortization of intangible assets		4.0			7.9			—			11.9			3.9			4.5			—			8.4
Adjusted earnings (losses) before income taxes(2)	$	6.6		$	3.0		$	(4.3	)	$	5.3		$	26.6		$	21.1		$	(6.1	)	$	41.6

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	Six Months Ended June 30, 2020												Six Months Ended June 30, 2019
	Industrial			Non- industrial			Corp. & other			Total			Industrial			Non- industrial			Corp. & other			Total
	($ in millions)
Noninsurance revenue(1)	$	523.1		$	417.3		$	0.1		$	940.5		$	578.4		$	520.0		$	0.3		$	1,098.7
Net investment income		1.8			—			—			1.8			2.4			(0.2	)		—			2.2
Net realized capital gains		5.3			(0.2	)		16.3			21.4			0.6			—			—			0.6
Total revenues	$	530.2		$	417.1		$	16.4		$	963.7		$	581.4		$	519.8		$	0.3		$	1,101.5
Other operating expenses(1)		508.4			411.7			4.2			924.3			534.4			468.3			11.1			1,013.8
Amortization of intangible assets		7.4			13.8			—			21.2			6.4			8.7			—			15.1
Interest expense		4.5			4.2			(0.6	)		8.1			6.0			3.1			(0.1	)		9.0
Earnings (losses) before income taxes	$	9.9		$	(12.6	)	$	12.8		$	10.1		$	34.6		$	39.7		$	(10.7	)	$	63.6
Earnings (losses) before income taxes	$	9.9		$	(12.6	)	$	12.8		$	10.1		$	34.6		$	39.7		$	(10.7	)	$	63.6
Less: net realized capital gains		(5.3	)		0.2			(16.3	)		(21.4	)		(0.6	)		—			—			(0.6	)
Add: amortization of intangible assets		7.4			13.8			—			21.2			6.4			8.7			—			15.1
Adjusted earnings (losses) before income taxes(2)	$	12.0		$	1.4		$	(3.5	)	$	9.9		$	40.4		$	48.4		$	(10.7	)	$	78.1

(1) For industrial and non-industrial operations: (i) noninsurance revenue consists of the sale of manufactured goods and services; and (ii) other operating expenses consist of the cost of goods and services sold and selling, general and administrative expenses. Other operating expenses also include finders’ fees, legal and accounting costs and other transaction-related expenses of $1.6 million and $1.0 million for the second quarter of 2020 and 2019, respectively, and $4.4 million and $1.4 million for the first six months of 2020 and 2019, respectively.

(2) Adjusted earnings before income taxes is a non-GAAP financial measure and does not replace earnings before income taxes determined in accordance with GAAP as a measure of profitability. See “Comment on Non-GAAP Financial Measures” herein for additional detail on the presentation of our results of operations. Adjusted earnings before income taxes represents noninsurance revenue and net investment income less other operating expenses and interest expense and does not include: (i) amortization of intangible assets; (ii) change in the fair value of equity securities; (iii) net realized capital gains; (iv) change in allowance for credit losses on available for sale securities; and (v) income taxes.

The changes in Alleghany Capital’s equity for the three and six months ended June 30, 2020 and 2019 are presented in the table below:

	Three Months Ended June 30,
	2020											2019
	Industrial			Non- industrial			Corp. & other			Total		Industrial			Non- industrial			Corp. & other			Total
	($ in millions)
Equity, beginning of period	$	542.0		$	468.4		$	(9.7	)	$	1,000.7	$	467.0		$	437.6		$	(42.4	)	$	862.2
Earnings (losses) before income taxes		2.7			(4.9	)		12.0			9.8		22.9			16.6			(6.1	)		33.4
Income taxes(1)		0.8			(0.1	)		1.0			1.7		(0.8	)		(0.4	)		(5.3	)		(6.5	)
Net (losses) earnings attributable to noncontrolling interests(2)		(0.9	)		1.8			—			0.9		(3.8	)		(5.6	)		—			(9.4	)
Capital contributions (returns of capital) and other		62.4			(4.8	)		(57.5	)		0.1		30.7			(37.6	)		7.1			0.2
Equity, end of period	$	607.0		$	460.4		$	(54.2	)	$	1,013.2	$	516.0		$	410.6		$	(46.7	)	$	879.9

	Six Months Ended June 30,
	2020											2019
	Industrial			Non- industrial			Corp. & other			Total		Industrial			Non- industrial			Corp. & other			Total(1)
	($ in millions)
Equity, beginning of period	$	523.3		$	410.6		$	(33.0	)	$	900.9	$	462.5		$	443.3		$	(44.2	)	$	861.6
Earnings (losses) before income taxes		9.9			(12.6	)		12.8			10.1		34.6			39.7			(10.7	)		63.6
Income taxes(1)		(0.7	)		(0.1	)		1.4			0.6		(0.9	)		(1.7	)		(10.7	)		(13.3	)
Net (losses) earnings attributable to noncontrolling interests(2)		(0.9	)		2.1			—			1.2		(6.0	)		(11.0	)		—			(17.0	)
Capital contributions (returns of capital) and other(3)		75.4			60.4			(35.4	)		100.4		25.8			(59.7	)		18.9			(15.0	)
Equity, end of period	$	607.0		$	460.4		$	(54.2	)	$	1,013.2	$	516.0		$	410.6		$	(46.7	)	$	879.9

(1) Federal income taxes for most Alleghany Capital subsidiaries are incurred at the Alleghany Capital corporate level. Estimated federal income tax (expense) benefit incurred at the Alleghany Capital corporate level attributable to industrial and non-industrial operations for the three months ended June 30, 2020 was ($0.2) million and $1.0 million, respectively, and for the three months ended June 30, 2019 was ($5.0) million and ($3.5) million, respectively, and for the six months ended June 30, 2020 was ($1.7) million and $2.6 million, respectively, and for the six months ended June 30, 2019 was ($7.3) million and ($8.3) million, respectively.

(2) During the first six months of 2020, the noncontrolling interests outstanding were approximately as follows: Kentucky Trailer - 23 percent; W&W|AFCO Steel - 20 percent; IPS - 15 percent; Jazwares - 24 percent; and Concord - 15 percent. Prior to April 1, 2019, the noncontrolling interests of PCT were approximately 11 percent. All noncontrolling interest holders of PCT have exercised their repurchase options and sold their ownership interests to PCT effective April 1, 2019.

(3) For the six months ended June 30, 2020, capital contributions primarily reflect funding provided by: (i) Alleghany Capital to PCT for its acquisition of a manufacturer of high-performance carbide end mills in March 2020; (ii) Alleghany Capital to Jazwares for its acquisition of a plush toy manufacturer that closed on April 1, 2020; and (iii) Alleghany to Alleghany Capital for its purchase of an additional approximately 55 percent of Wilbert it previously did not own that closed on April 1, 2020. For the six months ended June 30, 2019, capital contributions primarily reflect funding provided by Alleghany Capital to PCT for the acquisition of a consumable cutting tool manufacturer in June 2019.

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Noninsurance revenue. The decreases in noninsurance revenue in the second quarter and first six months of 2020 from the comparable 2019 periods reflect decreases in non-industrial and industrial operations.

The decreases in non-industrial noninsurance revenue reflect lower sales at Jazwares, IPS and Concord.  The decreases at Jazwares are due to the acquisition of a major new video game license in the fourth quarter of 2018, which positively impacted sales in the second quarter and first six months of 2019 and, to a lesser extent, Pandemic-related temporary shelter in place orders, disruptions to shipping schedules and store closures in the second quarter and first six months of 2020.  Typically, the first six months of the year is a seasonal low for the sale of toys.  The decreases at IPS are due to Pandemic-related shelter in place orders, customer site closures and additional safety measures and related delays in construction projects.  The decreases at Concord are due to Pandemic-related travel restrictions and shelter in place requirements.  

The decrease in industrial noninsurance revenue primarily reflects the timing of revenue recognition on certain large construction projects at W&W|AFCO Steel and, to a lesser extent, the impact of Pandemic-related shelter in place orders, safety measures undertaken and customer site closures during the second quarter and first six months of 2020, partially offset by the impact of Wilbert’s April 1, 2020 inclusion in our consolidated results, as discussed above.

Net investment income. The decreases in net investment income in the second quarter and first six months of 2020 from the comparable 2019 periods primarily reflect a cessation of equity income from Wilbert upon Wilbert’s April 1, 2020 inclusion in our consolidated results, as discussed above.

Net realized capital gains.  Net realized capital gains in the second quarter and first six months of 2020 primarily reflect the $16.3 million Wilbert Remeasurement Gain. In addition, the first six months of 2020 include realized gains from a reduction of certain contingent consideration liabilities at the PCT-level in connection with its acquisition of a provider of high-performance solid carbide end mills in June 2019.

Other operating expenses. The decreases in other operating expenses in the second quarter and first six months of 2020 from the comparable 2019 periods primarily reflect decreases in costs related to declines in revenues in non-industrial and industrial operations, as described above, partially offset by the cost of Pandemic-related safety measures undertaken during the second quarter and first six months of 2020 and an increase in finders’ fees, legal and accounting costs and other transaction-related expenses.  The decreases in other operating expenses also reflects lower incentive compensation accruals in Alleghany Capital’s corporate operations due to a decline in overall financial performance.

Amortization of intangible assets. The increases in amortization expense in the second quarter and first six months of 2020 from the comparable 2019 periods primarily reflect recent acquisitions by Jazwares and PCT, as well as the impact of Wilbert’s April 1, 2020 inclusion in our consolidated results, as discussed above.

Interest expense. The decreases in interest expense in the second quarter and first six months of 2020 from the comparable 2019 periods primarily reflect lower overall borrowings to support working capital needs, partially offset by the impact of Wilbert’s April 1, 2020 inclusion in our consolidated results, as discussed above.

Earnings (losses) before income taxes. The decreases in earnings before income taxes in the second quarter and first six months of 2020 from the comparable 2019 periods primarily reflect lower earnings before income taxes in the industrial and non-industrial operations, partially offset by the Wilbert Remeasurement Gain and lower incentive compensation accruals in Alleghany Capital’s corporate operations.  The decrease in industrial and non-industrial earnings before income taxes reflect the impact of lower sales and margins, particularly at Jazwares and W&W|AFCO Steel, due to the impact of the Pandemic, including shelter in place orders, customer site closures and supply disruptions, the cost of Pandemic-related safety measures and higher amortization of intangible assets, as discussed above.

55

Corporate Activities Results

The primary components of corporate activities are Alleghany Properties, SORC and activities at the Alleghany parent company. The following table presents the results for corporate activities:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2020			2019			2020			2019
	($ in millions)
Net premiums earned	$	—		$	—		$	—		$	—
Net investment income		3.3			3.5			3.9			7.3
Change in the fair value of equity securities		—			0.4			(1.4	)		3.6
Net realized capital gains		(44.4	)		—			(81.6	)		—
Change in allowance for credit losses on available for sale securities		0.4			—			(0.3	)		—
Noninsurance revenue		1.2			3.6			4.5			7.3
Total revenues		(39.5	)		7.5			(74.9	)		18.2
Net loss and loss adjustment expenses		—			—			—			—
Commissions, brokerage and other underwriting expenses		—			—			—			—
Other operating expenses		3.4			7.0			9.6			14.3
Corporate administration		18.1			24.2			5.8			42.5
Amortization of intangible assets		—			—			—			—
Interest expense		11.1			13.6			19.0			26.1
(Losses) before income taxes	$	(72.1	)	$	(37.3	)	$	(109.3	)	$	(64.7	)

Net investment income. The decreases in net investment income in the second quarter and first six months of 2020 from the comparable 2019 periods primarily reflect lower interest from lower partnership income.

Change in the fair value of equity securities. In the first quarter of 2019, a substantial portion of our investment portfolio at the Alleghany parent company-level was reallocated from equity securities to debt securities.  The change in the fair value of equity securities in the first six months of 2020 reflects significant depreciation in the value of equity securities that remain at the Alleghany parent company-level due primarily to the impact of the Pandemic, as discussed above. The change in the fair value of equity securities in the first six months of 2019 reflects appreciation in the value of the equity securities held at the Alleghany parent company-level, primarily from holdings in the technology sector.

Net realized capital gains. The net realized capital losses in the second quarter and first six months of 2020 primarily reflect $44.5 million and $74.4 million impairment charges from the write-down of SORC oil field assets.  SORC’s oil field assets are held for sale and consequently, were written down to estimated fair value, which reflects a significant decline in oil prices, less costs to sell.  As of June 30, 2020, SORC’s stockholder’s equity was $26.3 million, which consisted primarily of deferred tax assets and current taxes receivable.  The net realized capital losses in the first six months of 2020 also include a $7.1 million realized loss as a result of an early redemption of certain senior notes as of January 15, 2020.  See Note 11(a) to Notes to Unaudited Consolidated Financial Statements set forth in Part I, Item 1, “Financial Statements” of this Form 10-Q for additional information on this early redemption.

Noninsurance revenue. The decreases in noninsurance revenue in the second quarter and first six months of 2020 from the comparable 2019 periods primarily reflect lower energy sales at SORC.

Other operating expenses. The decreases in other operating expenses in the second quarter and first six months of 2020 from the comparable 2019 periods primarily reflect reduced costs at SORC.

Corporate administration. The decreases in corporate administration expense in the second quarter and first six months of 2020 from the comparable 2019 periods reflect significantly lower Alleghany parent company long-term incentive compensation accruals due primarily to the impacts of depreciation of Alleghany stock price and lower consolidated net earnings attributable to Alleghany stockholders, as discussed above.

Interest expense. The decreases in interest expense in the second quarter and first six months of 2020 from the comparable 2019 periods primarily reflect the impact of the early redemption of certain senior notes on January 15, 2020, partially offset by the issuance of certain senior notes on May 18, 2020. See Note 11(a) to Notes to Unaudited Consolidated Financial Statements set forth in Part I, Item 1, “Financial Statements” of this Form 10-Q for additional detail.

(Losses) before income taxes. The increases in losses before income taxes in the second quarter and first six months of 2020 from the comparable 2019 periods primarily reflect the write-down of SORC oil field assets, partially offset by the impact of lower Alleghany parent company long-term incentive compensation accruals, all as discussed above. In addition, the increase in losses before income taxes in the first six months of 2020 reflects a realized loss on early redemption of certain senior notes in the first quarter of 2020, as discussed above.

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Reserve Review Process

Our reinsurance and insurance subsidiaries analyze, at least quarterly, liabilities for unpaid loss and LAE established in prior years and adjust their expected ultimate cost, where necessary, to reflect favorable or unfavorable development in loss experience and new information, including, for certain catastrophe events, revised industry estimates of the magnitude of a catastrophe. Adjustments to previously recorded liabilities for unpaid loss and LAE, both favorable and unfavorable, are reflected in our financial results in the periods in which these adjustments are made and are referred to as prior accident year loss reserve development. The following table presents the reserves established in connection with the loss and LAE of our reinsurance and insurance segments on a gross and net basis by line of business. These reserve amounts represent the accumulation of estimates of ultimate loss (including for losses that have been incurred but not reported) and LAE.

	As of June 30, 2020								As of December 31, 2019
	Gross Loss and LAE Reserves			Reinsurance Recoverables on Unpaid Losses			Net Loss and LAE Reserves		Gross Loss and LAE Reserves			Reinsurance Recoverables on Unpaid Losses			Net Loss and LAE Reserves
	($ in millions)
Reinsurance Segment
Property	$	1,919.9		$	(470.3	)	$	1,449.6	$	1,965.5		$	(604.3	)	$	1,361.2
Casualty & other(1)		7,400.0			(313.6	)		7,086.4		7,358.3			(303.2	)		7,055.1
		9,319.9			(783.9	)		8,536.0		9,323.8			(907.5	)		8,416.3
Insurance Segment
Property		397.8			(128.1	)		269.7		409.0			(142.2	)		266.8
Casualty(2)		2,209.9			(559.6	)		1,650.3		2,075.3			(537.3	)		1,538.0
Workers' Compensation		2.1			—			2.1		2.3			—			2.3
All other(3)		190.4			(67.7	)		122.7		183.7			(62.6	)		121.1
		2,800.2			(755.4	)		2,044.8		2,670.3			(742.1	)		1,928.2
Eliminations		(68.8	)		68.8			—		(65.7	)		65.7			—
Total	$	12,051.3		$	(1,470.5	)	$	10,580.8	$	11,928.4		$	(1,583.9	)	$	10,344.5

(1) Primarily consists of the following reinsurance lines of business: directors’ and officers’ liability; errors and omissions liability; general liability; medical malpractice; ocean marine and aviation; auto liability; accident and health; mortgage reinsurance; surety; asbestos-related illness and environmental impairment liability; and credit.

(2) Primarily consists of the following direct lines of business: umbrella/excess; directors’ and officers’ liability; professional liability; and general liability.

(3) Primarily consists of commercial multi-peril and surety lines of business, as well as loss and LAE reserves for terminated lines of business and loss reserves acquired in connection with prior acquisitions for which the sellers provided loss reserve guarantees.

Changes in Gross and Net Loss and LAE Reserves between June 30, 2020 and December 31, 2019. Gross and net loss and LAE reserves as of June 30, 2020 increased from December 31, 2019, primarily reflecting the impact of growing net premiums earned and catastrophe losses incurred in the first six months of 2020, partially offset by payments on catastrophe losses incurred primarily in 2017, 2018 and 2019 and favorable prior accident year loss reserve development, all as discussed above.

Reinsurance Recoverables

Our reinsurance and insurance subsidiaries reinsure portions of the risks they underwrite in order to reduce the effect of individual or aggregate exposure to losses, manage capacity, protect capital resources, reduce volatility in specific lines of business, improve risk-adjusted portfolio returns and enable them to increase gross premiums writings and risk capacity without requiring additional capital. Our reinsurance and insurance subsidiaries generally purchase reinsurance and retrocessional coverages from highly-rated third-party reinsurers or on a collateralized basis. If the assuming reinsurers are unable or unwilling to meet the obligations assumed under the applicable reinsurance agreements, our reinsurance and insurance subsidiaries would remain liable for such reinsurance portion not paid by these reinsurers. As such, funds, trust agreements and letters of credit are held to collateralize a portion of our reinsurance and insurance subsidiaries’ reinsurance recoverables, and our reinsurance and insurance subsidiaries reinsure portions of the risks they underwrite or assume with multiple reinsurance programs.

As of June 30, 2020, our reinsurance and insurance subsidiaries had total reinsurance recoverables of $1,539.7 million, consisting of $1,470.5 million of ceded outstanding loss and LAE and $76.1 million of recoverables on paid losses, less $6.9 million of an allowance for credit losses.  See Note 4 to Notes to Unaudited Consolidated Financial Statements set forth in Part I, Item 1, “Financial Statements” of this Form 10-Q for additional information on: (i) the reinsurance purchased by our reinsurance and insurance subsidiaries; (ii) the allowance for credit losses; (iii) the concentration of our reinsurance recoverables; and (iv) the ratings profile of our reinsurers.

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Critical Accounting Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions about future events that directly affect our reported financial condition and operating performance. More specifically, these estimates and assumptions affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements, as well as the reported amounts of revenues and expenses during the reporting period. We rely on historical experience and on various other assumptions that we believe to be reasonable under the circumstances to make judgments about the carrying value of assets and liabilities and reported revenues and expenses that are not readily apparent from other sources. Actual results may differ materially from reported results to the extent that estimates and assumptions prove to be inaccurate.

We believe our most critical accounting estimates are those with respect to the liability for unpaid loss and LAE reserves, fair value measurements of certain financial assets, changes in allowance for credit losses on available for sale securities, goodwill and other intangible assets and reinsurance premium revenues, as they require management’s most significant exercise of judgment on both a quantitative and qualitative basis. The accounting estimates that result require the use of assumptions about certain matters that are highly uncertain at the time of estimation. To the extent actual experience differs from the assumptions used, our financial condition, results of operations and cash flows would be affected, possibly materially.

See Part II, Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Critical Accounting Estimates” of the 2019 Form 10-K for a more complete description of our critical accounting estimates.

Financial Condition

Parent Level

General. In general, we follow a policy of maintaining a relatively liquid financial condition at our unrestricted holding companies. This policy has permitted us to expand our operations through internal growth at our subsidiaries and through acquisitions of, or substantial investments in, operating companies. As of June 30, 2020, we held total marketable securities and cash of $1,241.9 million, compared with $1,283.3 million as of December 31, 2019. The decrease in marketable securities and cash in the first six months of 2020 primarily reflects the redemption of certain senior notes and a special dividend paid in the first quarter of 2020, as discussed below, as well as depreciation in the value of the equity securities portfolio held at the holding company-level, as discussed above, as well as contributions to Alleghany Capital to fund the acquisitions of Wilbert and acquisitions made by Jazwares and PCT, partially offset by the issuance of the 2030 Senior Notes, as discussed below, and the receipt of dividends from TransRe and RSUI. The $1,241.9 million is composed of $785.3 million at the Alleghany parent company, $411.9 million at AIHL and $44.7 million at the TransRe holding company. We also hold certain non-marketable investments at our unrestricted holding companies. We believe that we have and will have adequate internally generated funds, cash resources and unused credit facilities to provide for the currently foreseeable needs of our business, and we had no material commitments for capital expenditures as of June 30, 2020.

Stockholders’ equity attributable to Alleghany stockholders was approximately $8.5 billion as of June 30, 2020, compared with approximately $8.8 billion as of December 31, 2019. The decrease in stockholders’ equity in the first six months of 2020 primarily reflects net losses attributable to Alleghany stockholders, as discussed above, as well as a special dividend and repurchases of our common stock, all as discussed below. As of June 30, 2020, we had 14,311,952 shares of our common stock outstanding, compared with 14,364,628 shares of our common stock outstanding as of December 31, 2019.

Debt. On May 18, 2020, we completed a public offering of $500.0 million aggregate principal of our 3.625% senior notes due on May 15, 2030, or the “2030 Senior Notes.”  The 2030 Senior Notes are unsecured and unsubordinated general obligations of Alleghany.  Interest on the 2030 Senior Notes is payable semi-annually in arrears on May 15 and November 15 of each year.  The terms of the 2030 Senior Notes permit redemption prior to maturity.  The indenture under which the 2030 Senior Notes were issued contains covenants that impose conditions on our ability to create liens on the capital stock of AIHL, TransRe or RSUI.  The 2030 Senior Notes were issued at approximately 99.9 percent of par, resulting in proceeds after underwriting discount, commissions and other expenses of $494.8 million, and an effective yield of approximately 3.64 percent.  Approximately $4.6 million of underwriting discount, commissions and other expenses were recorded as deferred charges, which are amortized over the life of the 2030 Senior Notes.

On September 9, 2014, we completed a public offering of $300.0 million aggregate principal amount of our 4.90% senior notes due on September 15, 2044. On June 26, 2012, we completed a public offering of $400.0 million aggregate principal amount of our 4.95% senior notes due on June 27, 2022. On September 20, 2010, we completed a public offering of $300.0 million aggregate principal amount of our 5.625% senior notes due on September 15, 2020, or the “2020 Senior Notes,” and on January 15, 2020, we redeemed the 2020 Senior Notes.  See Note 11(a) to Notes to Consolidated Financial Statements set forth in Part II, Item 8, “Financial Statements and Supplementary Data” of the 2019 Form 10-K for additional information on our senior notes and our early redemption of debt.

Credit Agreement. On July 31, 2017, we entered into a five-year credit agreement, or the “Credit Agreement,” with certain lenders party thereto, which provides for an unsecured revolving credit facility in an aggregate principal amount of up to $300.0 million. The credit facility is scheduled to expire on July 31, 2022, unless earlier terminated. Borrowings under the Credit Agreement will be available for working capital and general corporate purposes, including permitted acquisitions and repurchases of common stock. Borrowings under the Credit Agreement bear a floating rate of interest based in part on our credit rating, among other factors. The Credit Agreement contains representations, warranties and covenants customary for bank loan facilities of this nature.

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There were no borrowings under the Credit Agreement from inception through June 30, 2020.

Common Stock Repurchases. In June 2018, our Board of Directors authorized the repurchase of additional shares of our common stock at such times and at prices as management determines to be advisable, up to an aggregate of $400.0 million. In September 2019, our Board of Directors authorized, upon the completion of the previously announced program, the repurchase of additional shares of our common stock at such times and at prices as management determines to be advisable, up to an aggregate of $500.0 million. As of June 30, 2020, we had $582.9 million remaining under our repurchase authorizations.

The following table presents the shares of our common stock that we repurchased in the three and six months ended June 30, 2020 and 2019:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2020		2019		2020		2019
Shares repurchased		—		19,246		62,540		148,813
Cost of shares repurchased (in millions)	$	—	$	12.7	$	44.3	$	93.2
Average price per share repurchased	$	—	$	658.09	$	707.84	$	625.96

Special Dividend. In February 2020, our Board of Directors declared a special dividend of $15.00 per share for stockholders of record on March 5, 2020. On March 15, 2020, we paid dividends to stockholders totaling $215.0 million.

Investments in Certain Variable Interest Entities. In December 2012, TransRe obtained an ownership interest in Pillar Capital Holdings, Limited, or “Pillar Holdings,” a Bermuda-based insurance asset manager focused on collateralized reinsurance and catastrophe insurance-linked securities. Additionally, TransRe and AIHL invested in limited partnership funds managed by Pillar Holdings, or the “Funds.” We have concluded that both Pillar Holdings and the Funds, or collectively, the “Pillar Investments,” represent variable interest entities and that we are not the primary beneficiary, as we do not have the ability to direct the activities that most significantly impact each entity’s economic performance. Therefore, the Pillar Investments are not consolidated and are accounted for under the equity method of accounting. See Note 3(h) to Notes to Unaudited Consolidated Financial Statements set forth in Part I, Item 1, “Financial Statements” of this Form 10-Q for additional information on Pillar Investments as of June 30, 2020.

See Note 9(c) to Notes to Unaudited Consolidated Financial Statements set forth in Part I, Item 1, “Financial Statements” of this Form 10-Q for further information regarding variable interest entities.

Investments in Commercial Mortgage Loans. As of June 30, 2020 and December 31, 2019, the carrying value of our commercial mortgage loan portfolio was $685.4 million and $686.2 million, respectively, representing the unpaid principal balance on the loans, less allowance for credit losses. See Note 3(i) to Notes to Unaudited Consolidated Financial Statements set forth in Part I, Item 1, “Financial Statements” of this Form 10-Q for additional detail on the ratings of our commercial mortgage portfolio as of June 30, 2020.

Subsidiaries

Financial strength is also a high priority of our subsidiaries, whose assets stand behind their financial commitments to their customers and vendors. We believe that our subsidiaries have and will have adequate internally generated funds, cash resources and unused credit facilities to provide for the currently foreseeable needs of their businesses. Our subsidiaries had no material commitments for capital expenditures as of June 30, 2020.

The obligations and cash outflow of our reinsurance and insurance subsidiaries include claim settlements, commission expenses, administrative expenses, purchases of investments and interest and principal payments on TransRe’s 8.00% senior notes due on November 30, 2039. In addition to premium collections, cash inflow is obtained from interest and dividend income, maturities and sales of investments and reinsurance recoveries. Because cash inflow from premiums is received in advance of cash outflow required to settle claims, our reinsurance and insurance operating units accumulate funds which they invest pending the need for liquidity. As the cash needs of a reinsurance or an insurance company can be unpredictable due to the uncertainty of the claims settlement process, the portfolios of our reinsurance and insurance subsidiaries consist primarily of debt securities and short-term investments to ensure the availability of funds and maintain a sufficient amount of liquid securities.

Included in Alleghany Capital is debt associated with its operating subsidiaries, which totaled $438.3 million as of June 30, 2020, which is generally used to support working capital needs and to help finance acquisitions. The $438.3 million included:

• $161.6 million of borrowings by Jazwares under its available credit facilities and borrowings incurred and assumed from its acquisition of Wicked Cool Toys, LLC in October 2019 and its acquisition of Kelly Toys Holdings, LLC in April 2020;

• $74.4 million of borrowings by Wilbert under its available credit facility and term loans;

• $65.2 million of term loans at Kentucky Trailer primarily related to borrowings to finance small acquisitions, including its acquisitions of controlling interests in certain manufacturers of aluminum feed transportation equipment in December 2018 and July 2019, and borrowings under its available credit facilities;

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• $58.0 million of borrowings by W&W|AFCO Steel under its available credit facilities and term loans (including borrowings incurred and assumed from its acquisition of Hirschfeld Holdings, LP in February 2018);

• $43.6 million of borrowings by IPS under its available credit facility and term loans, in part to finance a small acquisition in May 2019; and

• $35.5 million of term loans at PCT primarily related to borrowings to finance the acquisition of a waterjet orifice and nozzle manufacturer in 2016 and the acquisition of a consumable cutting tool manufacturer in June 2019.

None of these liabilities are guaranteed by Alleghany or Alleghany Capital. In December 2019, third-party, floating-rate term loans at Concord were repaid and replaced with approximately $33 million of intercompany floating-rate debt funded by the Alleghany parent company. The intercompany debt and related interest expenses are eliminated at the Alleghany consolidated level.

With respect to corporate activities, SORC has relied on Alleghany almost entirely to support its operations. From its formation in 2011 through June 30, 2020, we have invested $275.9 million in SORC.

Hotel Development Commitments.  In the first six months of 2020, Alleghany Capital invested $0.8 million in certain hotel development projects.  The projects are conducted through certain limited liability entities, which are variable interest entities, to which we are not the primary beneficiary.  As of June 30, 2020, we guaranteed up to $5.6 million of debt of these entities to certain third party lenders for which we receive a fee.

Consolidated Investment Holdings

Investment Strategy and Holdings. Our investment strategy seeks to preserve principal and maintain liquidity while trying to maximize our risk-adjusted, after-tax rate of return. Our investment decisions are guided mainly by the nature and timing of expected liability payouts, management’s forecast of cash flows and the possibility of unexpected cash demands, such as, to satisfy claims due to catastrophe losses. Our consolidated investment portfolio consists mainly of highly rated and liquid debt and equity securities listed on national securities exchanges. The overall credit quality of the debt securities portfolio is measured using the lowest rating of three large, reputable rating agencies.  In this regard, the overall weighted-average credit quality rating of our debt securities portfolio as of June 30, 2020 and December 31, 2019 was AA-. Although a portion of our debt securities, which consist predominantly of municipal bonds, are insured by third-party financial guaranty insurance companies, the impact of such insurance was not significant to the debt securities credit quality rating as of June 30, 2020. See Note 3(f) to Notes to Unaudited Consolidated Financial Statements set forth in Part I, Item 1, “Financial Statements” of this Form 10-Q for additional detail on the ratings of our debt securities portfolio as of June 30, 2020.

Our debt securities portfolio has been designed to enable management to react to investment opportunities created by changing interest rates, prepayments, tax and credit considerations or other factors, or to circumstances that could result in a mismatch between the desired duration of debt securities and the duration of liabilities and, as such, is classified as available for sale.

Effective duration measures a portfolio’s sensitivity to changes in interest rates. In this regard, as of June 30, 2020 and December 31, 2019, our debt securities portfolio had an effective duration of approximately 4.5 years and 4.2 years, respectively. The increase in duration during the first six months of 2020 primarily reflects a decline in risk-free interest rates and a related decrease in the likelihood that many of our municipal bonds and mortgage-backed securities will be prepaid.  As of June 30, 2020, approximately $4.0 billion, or 27 percent, of our debt securities portfolio represented securities with maturities of five years or less. See Note 3(b) to Notes to Unaudited Consolidated Financial Statements set forth in Part I, Item 1, “Financial Statements” of this Form 10-Q for additional detail on the contractual maturities of our consolidated debt securities portfolio. We may increase the proportion of our debt securities portfolio held in securities with maturities of more than five years should the yields of these securities provide, in our judgment, sufficient compensation for their increased risk. We do not believe that this strategy would reduce our ability to meet ongoing claim payments or to respond to significant catastrophe losses.

In the event paid losses accelerate beyond the ability of our reinsurance and insurance subsidiaries to fund these paid losses from current cash balances, current operating cash flow, dividend and interest receipts and security maturities, we would need to liquidate a portion of our investment portfolio, make capital contributions to our reinsurance and insurance subsidiaries, and/or arrange for financing. Strains on liquidity could result from: (i) the occurrence of several significant catastrophe events in a relatively short period of time; (ii) the sale of investments into a depressed marketplace to fund these paid losses; (iii) the uncollectibility of reinsurance recoverables on these paid losses; (iv) the significant decrease in the value of collateral supporting reinsurance recoverables; or (v) a significant reduction in our net premium collections.

We may, from time to time, make significant investments in the common stock of a public company, subject to limitations imposed by applicable regulations.

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On a consolidated basis, as of June 30, 2020, our invested assets decreased to approximately $18.6 billion from approximately $18.9 billion as of December 31, 2019, primarily reflecting depreciation in the value of our equity securities portfolio, the early redemption of our 2020 Senior Notes, the special dividend payment and repurchases of shares of our common stock, all as discussed above, partially offset by appreciation in the value of our debt securities portfolio and net proceeds from the issuance of our 2030 Senior Notes. The appreciation in the value of our debt securities portfolio reflects a decrease in risk-free interest rates in the first six months of 2020, partially offset by an increase in credit spreads.

Fair Value. Fair value is defined as the price that would be received upon the sale of an asset or paid to transfer a liability in an orderly transaction between willing, able and knowledgeable market participants at the measurement date. Fair value measurements are not adjusted for transaction costs. In addition, a three-tiered hierarchy for inputs is used in management’s determination of fair value of financial instruments that emphasizes the use of observable inputs over the use of unobservable inputs by requiring that the observable inputs be used when available. Observable inputs are market participant assumptions based on market data obtained from sources independent of the reporting entity. Unobservable inputs are the reporting entity’s own assumptions about market participant assumptions based on the best information available under the circumstances. In assessing the appropriateness of using observable inputs in making our fair value determinations, we consider whether the market for a particular security is “active” or “inactive” based on all the relevant facts and circumstances. A market may be considered to be inactive if there are relatively few recent transactions or if there is a significant decrease in market volume. Furthermore, we consider whether observable transactions are “orderly” or not. We do not consider a transaction to be orderly if there is evidence of a forced liquidation or other distressed condition; as such, little or no weight is given to that transaction as an indicator of fair value. See Note 1 to Notes to Consolidated Financial Statements set forth in Part II, Item 8, “Financial Statements and Supplementary Data” of the 2019 Form 10-K for additional information on our accounting policy on fair value.

The following table presents the carrying values and estimated fair values of our consolidated financial instruments as of June 30, 2020 and December 31, 2019:

	June 30, 2020				December 31, 2019
	Carrying Value		Fair Value		Carrying Value		Fair Value
	($ in millions)
Assets
Investments (excluding equity method investments and loans)(1)	$	17,509.1	$	17,509.1	$	17,632.3	$	17,632.3
Liabilities
Senior notes and other debt(2)	$	2,017.9	$	2,283.2	$	1,751.1	$	1,962.7

(1) This table includes debt and equity securities, as well as partnership and non-marketable equity investments accounted for at fair value that are included in other invested assets. This table excludes investments accounted for using the equity method and commercial mortgage loans that are accounted for at unpaid principal balance.

(2) See Note 11 to Notes to Consolidated Financial Statements set forth in Part I, Item 1, “Financial Statements” of this Form 10-Q for additional information on the senior notes and other debt.

See Note 3 to Notes to Unaudited Consolidated Financial Statements set forth in Part I, Item 1, “Financial Statements” of this Form 10-Q for additional information on our financial instruments measured at fair value and the level of the fair value hierarchy of inputs used as of June 30, 2020 and December 31, 2019.

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Municipal Bonds. The following table provides the fair value of our municipal bonds as of June 30, 2020, categorized by state and revenue source. Special revenue bonds are debt securities for which the payment of principal and interest is available solely from the cash flows of the related projects. As issuers of revenue bonds do not have the ability to draw from tax revenues or levy taxes to fund obligations, revenue bonds may carry a greater risk of default than general obligation bonds.

	Special Revenue
State	Education		Hospital		Housing		Lease Revenue		Special Tax		Transit		Utilities		All Other Sources		Total Special Revenue		Total General Obligation		Total Fair Value
	($ in millions)
New York	$	—	$	—	$	2.6	$	8.5	$	118.2	$	75.7	$	27.9	$	19.7	$	252.6	$	17.4	$	270.0
Texas		14.8		—		0.2		5.2		8.1		35.8		63.4		1.9		129.4		63.2		192.6
California		11.5		40.1		—		7.3		2.5		15.3		42.0		—		118.7		62.5		181.2
Massachusetts		16.2		5.6		7.9		—		27.5		1.3		21.9		0.3		80.7		61.0		141.7
Pennsylvania		6.1		1.5		9.8		—		—		31.9		4.2		31.3		84.8		44.4		129.2
Ohio		35.9		1.2		—		1.2		2.2		0.3		10.7		9.3		60.8		30.7		91.5
Florida		—		0.3		4.7		—		11.4		42.5		6.8		9.8		75.5		11.1		86.6
Washington		—		—		1.9		—		3.3		10.9		22.2		2.4		40.7		45.1		85.8
Utah		5.8		—		—		—		17.7		18.6		17.4		—		59.5		6.5		66.0
South Carolina		—		—		—		1.2		2.2		—		5.7		43.1		52.2		12.4		64.6
All other states		105.7		67.1		38.2		70.9		56.1		52.5		154.1		67.3		611.9		207.8		819.7
Total	$	196.0	$	115.8	$	65.3	$	94.3	$	249.2	$	284.8	$	376.3	$	185.1	$	1,566.8	$	562.1		2,128.9
Total advanced refunded / escrowed maturity funds																						257.3
Total municipal bonds																					$	2,386.2

Recent Accounting Standards

For a discussion of recently adopted accounting standards, see Note 1(c) to Notes to Unaudited Consolidated Financial Statements set forth in Part I, Item 1, “Financial Statements” of this Form 10-Q.

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Item 3. Quantitative and Qualitative Disclosures About Market Risk.

Market risk is the risk of loss from adverse changes in market prices and rates. The primary market risk related to our debt securities is the risk of loss associated with adverse changes in interest rates. We hold our debt securities as available for sale. Any changes in the fair value in these securities, net of tax, would be recorded as a component of other comprehensive income. However, if a decline in fair value relative to cost is believed to be other than temporary, a loss is generally recorded on our statement of earnings. We also invest in equity securities which are subject to fluctuations in market value. In addition, significant portions of our assets (principally investments) and liabilities (principally loss and LAE reserves and unearned premiums) are exposed to changes in foreign currency exchange rates. The net change in the carrying value of assets and liabilities denominated in foreign currencies is generally recorded as a component of other comprehensive income.

The sensitivity analyses presented below provide only a limited, point-in-time view of the market risk of our financial instruments. The actual impact of changes in market interest rates, equity market prices and foreign currency exchange rates may differ significantly from those shown in these sensitivity analyses. The sensitivity analyses are further limited because they do not consider any actions we could take in response to actual and/or anticipated changes in equity market prices, market interest rates or foreign currency exchange rates. In addition, these sensitivity analyses do not provide weight to risks related to market issues such as liquidity and the credit worthiness of investments.

Interest Rate Risk

The primary market risk for our debt securities is interest rate risk at the time of refinancing. We monitor the interest rate environment to evaluate reinvestment and refinancing opportunities. We generally do not use derivatives to manage market and interest rate risks. The table below presents a sensitivity analysis as of June 30, 2020 of our (i) consolidated debt securities and (ii) senior notes and other debt, which are sensitive to changes in interest rates. Sensitivity analysis is defined as the measurement of potential change in future earnings, fair values or cash flows of market sensitive instruments resulting from one or more selected hypothetical changes in interest rates over a selected time period. In the sensitivity analysis model below, we use a +/- 300 basis point range of change in interest rates to measure the hypothetical change in fair value of the financial instruments included in the analysis. The change in fair value is determined by calculating hypothetical June 30, 2020 ending prices based on yields adjusted to reflect a +/- 300 basis point range of change in interest rates, comparing these hypothetical ending prices to actual ending prices, and multiplying the difference by the par outstanding. The selected hypothetical changes in interest rates do not reflect what could be the potential best or worst case scenarios.

	-300		-200		-100		0		100			200			300
	($ in millions)
Assets:
Debt securities, fair value	$	17,247.8	$	16,419.6	$	15,654.1	$	14,950.0	$	14,271.3		$	13,609.0		$	12,984.1
Estimated change in fair value		2,297.8		1,469.6		704.1		—		(678.7	)		(1,341.0	)		(1,965.9	)
Liabilities:
Senior notes and other debt, fair value	$	2,894.9	$	2,658.7	$	2,456.6	$	2,283.2	$	2,133.1		$	2,001.9		$	1,887.6
Estimated change in fair value		611.7		375.5		173.4		—		(150.1	)		(281.3	)		(395.6	)

Equity Risk

Our equity securities are subject to fluctuations in market value. The table below presents our equity market price risk and reflects the effect of a hypothetical increase or decrease in market prices as of June 30, 2020 on the estimated fair value of our consolidated equity portfolio. The selected hypothetical price changes do not reflect what could be the potential best or worst case scenarios.

As of June 30, 2020
($ in millions)
Fair Value		Hypothetical Price Change	Estimated Fair Value After Hypothetical Change in Price		Hypothetical Percentage Increase (Decrease) in Stockholders' Equity
$	1,439.1	20% Increase	$	1,726.9		2.7%
		20% Decrease		1,151.2		(2.7%)

In addition to debt and equity securities, we invest in several partnerships which are subject to fluctuations in market value. Our partnership investments are included in other invested assets and are accounted for at fair value or using the equity method, and had a carrying value of $332.9 million as of June 30, 2020.

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Foreign Currency Exchange Rate Risk

Foreign currency exchange rate risk is the potential change in value arising from changes in foreign currency exchange rates. Our reinsurance operations located in foreign countries maintain some or all of their capital in their local currency and conduct business in their local currency, as well as the currencies of the other countries in which they operate. To mitigate this risk, we maintain investments denominated in certain foreign currencies in which the claims payments will be made. As of June 30, 2020, the largest foreign currency net liability exposures for these foreign operations were the Japanese Yen and Brazilian Real, and the largest foreign currency net asset exposures for these foreign operations was the Canadian Dollar. The table below presents our foreign currency exchange rate risk and shows the effect of a hypothetical increase or decrease in foreign currency exchange rates against the U.S. Dollar as of June 30, 2020 on the estimated net carrying value of our foreign currency denominated assets, net of our foreign currency denominated liabilities. The selected hypothetical changes do not reflect what could be the potential best or worst case scenarios.

As of June 30, 2020
($ in millions)
Estimated Fair Value		Hypothetical Price Change	Estimated Fair Value After Hypothetical Change in Price	Hypothetical Percentage Increase (Decrease) in Stockholders' Equity
$(135.0)	(1)	20% Increase	($162.0)	(0.3%)
		20% Decrease	(108.0)	0.3%

(1) Denotes a net liability position as of June 30, 2020.

Item 4. Controls and Procedures.

Disclosure Controls and Procedures

We carried out an evaluation, under the supervision and with the participation of our management, including our chief executive officer, or “CEO,” and our chief financial officer, or “CFO,” of the effectiveness of the design and operation of our disclosure controls and procedures as of the end of the period covered by this Form 10-Q pursuant to Rule 13a-15(e) or 15d-15(e) promulgated under the Securities Exchange Act of 1934, as amended, or the “Exchange Act.” Based on that evaluation, our management, including our CEO and CFO, concluded that our disclosure controls and procedures were effective as of that date to provide reasonable assurance that information required to be disclosed by us in reports that we file or submit under the Exchange Act is (i) recorded, processed, summarized, and timely reported as specified in the SEC’s rules and forms and (ii) accumulated and communicated to our management, including our CEO and CFO, as appropriate to allow for timely decisions regarding required disclosure. Our disclosure controls and procedures were designed to provide such assurance; however, we note that the design of any system of controls is based in part upon certain assumptions about the likelihood of future events, and we cannot assure you that any design will succeed in achieving its stated goals under all potential future conditions, regardless of how remote.

Changes in Internal Control Over Financial Reporting

No changes occurred during the quarter ended June 30, 2020 in our internal control over financial reporting that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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Part II. OTHER INFORMATION

Item 1. Legal Proceedings.

Certain of our subsidiaries are parties to pending litigation and claims in connection with the ordinary course of their businesses. Each such subsidiary makes provisions for estimated losses to be incurred in such litigation and claims, including legal costs. We believe such provisions are adequate and do not believe that any pending litigation will have a material adverse effect on our consolidated results of operations, financial position or cash flows. See Note 12(a) to Notes to Consolidated Financial Statements set forth in Part II, Item 8, “Financial Statements and Supplementary Data” of the 2019 Form 10-K.

Item 1A. Risk Factors.

There have been no material changes from the risk factors set forth in Part I, Item 1A, “Risk Factors” of the 2019 Form 10-K except as set forth below. The risk factors set forth below supplement, and should be read together with, that section for disclosures regarding what we believe are the more significant risks and uncertainties related to our businesses.

We expect that the impact of the COVID-19 global pandemic will continue to materially affect our businesses, results of operations, financial condition and liquidity. On March 11, 2020, the World Health Organization declared the global spread of a novel coronavirus (COVID-19) to be a pandemic and on March 12, 2020, the President of the United States declared the COVID-19 outbreak in the United States to be a national emergency. The COVID-19 global pandemic, or the “Pandemic,” and mitigation efforts by governments to attempt to control its spread have significantly impacted the global economy and our results of operations. We began to experience a negative impact on our results of operations arising from the Pandemic in the first quarter 2020 and that impact continued throughout the second quarter of 2020, and we expect it to continue to negatively affect our future results of operations in future periods, including in the third quarter of 2020. The duration and extent of the impact of the Pandemic on our business depends on future developments that cannot be accurately predicted at this time, such as the severity and transmission rate of the virus, the extent and effectiveness of containment actions and the impact of these and other factors on our employees, customers, suppliers and vendors. Given the scope and magnitude of the Pandemic, all of its direct and indirect consequences are not yet known and may not emerge for some time. The ongoing Pandemic presents risks and uncertainties to our operating businesses and investments, which could have a material adverse effect on our businesses, results of operations, financial condition and liquidity, including the following:

• Estimated Loss Reserves. The anticipated and unknown risks related to the Pandemic may cause additional uncertainty in the process of estimating loss reserves of our reinsurance and insurance subsidiaries. For example, the behavior of claimants and policyholders may change in unexpected ways (such as an increase in the number of fraudulent claims), we may see an increase in the number of claims for certain product lines, the disruption to the court system may impact the timing and amounts of claims settlements and the actions taken by governmental bodies, both legislative and regulatory, in reaction to the Pandemic and their related impacts are hard to predict. As a result, our estimated reserves may change.

• Revenues and Cash Flows. A prolonged economic downturn due to the Pandemic could result in a reduction in demand for our insurance and non-insurance products and services, which would negatively impact our revenues and cash flows. In addition, premium refunds or delayed receipt of premium payments, delayed payment of reinsurance recoverables and expedited claims payments in response to regulatory requirements as result of the Pandemic could have a negative impact on our revenues and cash flows.  

• Regulations, Orders and Proposed Legislation. Federal, state and local government actions to address and contain the impact of the Pandemic may adversely affect us. For example, we are subject to legislative and/or regulatory action that seeks to retroactively mandate coverage for losses that policies of our reinsurance and insurance company subsidiaries were not designed or priced to cover. Currently, in some states there is proposed legislation to require insurers to cover business interruption claims irrespective of terms, exclusions or other conditions included in the policies that would otherwise preclude coverage. Regulatory restrictions or requirements could also impact pricing, risk selection and our rights and obligations with respect to our policies and insureds, including our ability to cancel policies or our right to collect premiums. At least one state regulator has issued an order requiring insurers to issue premium refunds, and regulators in other states could take similar actions. It is also possible that changes in economic conditions and steps taken by federal, state and local governments in response to the Pandemic could require an increase in taxes at the federal, state and local levels, which would adversely impact our results of operations. In addition, we are a holding company and conduct our operations principally through our regulated reinsurance and insurance company subsidiaries.  We rely upon dividends and other permitted distributions from our regulated reinsurance and insurance company subsidiaries (including subsidiaries of AIHL and the TransRe holding company) as an important source of funds to meet our ongoing cash requirements, including our existing, and any future, debt service payments, and other expenses.  Our regulated reinsurance and insurance company subsidiaries are subject to various regulatory restrictions that limit the maximum amount of dividends available to be paid by them without prior approval of the relevant regulatory authorities.  In response to the Pandemic, it is possible that these regulatory restrictions may be increased which would decrease the amount of dividends we are permitted to receive from our regulated subsidiaries.

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• Heightened Cybersecurity Risks. Having shifted to remote working arrangements in many of our locations, we face a heightened risk of cybersecurity attacks or data security incidents and are more dependent on internet and telecommunications access and capabilities.

• Investments in Debt Securities, Equity Securities and Other Invested Assets. The fair value of our investments in debt, equity securities and certain other invested assets fluctuates depending on general economic and market conditions. In the first six months of 2020, the Pandemic had a significant negative impact on financial markets, and consequently the fair value of our equity securities depreciated by $280.8 million, and we recorded $14.4 million of losses through a credit allowance for available for sale debt securities. Due to the unprecedented nature of the Pandemic and related uncertainty, it is probable that financial markets, and by extension the value of our investment portfolio, will remain volatile until more clarity is available around the economic impact of the Pandemic. Prospectively, the sensitivity of the value of our investment portfolio relative to changes in broader financial markets can be approximated by the market beta of our equity holdings and the effective duration of our debt securities.  As of June 30, 2020, the market beta and effective duration of our equity and debt securities were 0.9 and 4.5 years, respectively. A market beta of 0.9 suggests that, over time, the portfolio is expected to move consistently with the stock market, and a duration of 4.5 years suggests that, for a 1% move in interest rates, the fixed income portfolio should appreciate or depreciate by 4.5 percent.

• Heightened Risks of Downgrades, Impairments and Defaults. We are subject to the risk that the issuers of debt securities we own or borrowers on commercial mortgage loans we have invested in may become less credit worthy or default on principal and interest payments they owe us. The longer and more severe the negative impact of the Pandemic, the more at risk our portfolio of investments in debt securities and commercial mortgage loans would be to credit downgrades, impairments and defaults. Exposures to industries and sectors most impacted by the shut-down of non-essential goods and services are at heightened risk of downgrades and other credit events. These include all forms of exposures to hospitality, travel, retail, energy and consumer finance. The risks related to a prolonged shut-down are by no means limited to these sectors, but these are likely to be severely impacted. 

• Deflationary Economic Environment. In a deflationary scenario, economic conditions deteriorate as the value of a unit of currency in the future exceeds its value in the present. In addition to this dynamic reducing the incentive to borrow, which would hinder economic growth, it also makes servicing existing debts more onerous for issuers, which in turn increases the likelihood of credit downgrades, impairments and defaults. Additionally, deflation generally is connected with lower interest rates which create challenges in generating sufficient levels of investment income.

• Oil and Gas Price Volatility. Market prices for oil and gas collapsed in the first six months of 2020 as the combination of the Pandemic and geopolitical tensions among the world’s energy producers resulted in the simultaneous reduction of demand and increase in supply of crude. The price shock has adversely affected the results, prospects and values of our investments in energy-related businesses, including Alleghany’s wholly-owned subsidiary SORC, which businesses are likely to remain pressured until the uncertainty around the Pandemic and the price of energy products abates.

• Counterparty Credit Risk. A prolonged economic downturn due to the Pandemic would increase our credit risk, reflecting our counterparty dealings with agents, brokers, customers, retrocessionaires, capital providers, and parties associated with our investment portfolio. If one or more of these counterparties experience operational or financial failures as a result of the impacts from the spread of COVID-19, or claim that they cannot perform due to a force majeure, it could have a material adverse effect on our businesses, results of operations, financial condition and liquidity.

In addition, adverse impacts from the Pandemic may include further declines in our equity securities portfolio, additional credit-related realized and unrealized losses on our debt securities and commercial mortgage portfolios, additional credit losses on our reinsurance recoverables and other receivables, further losses from event cancellation and other coverages from our reinsurance and insurance subsidiaries, negative impact to revenues and earnings of certain Alleghany Capital subsidiaries, and impairment of certain Alleghany Capital subsidiary goodwill and intangible assets. As a result of any one or a combination of the risks identified above, the Pandemic could have a material adverse effect on our businesses, results of operations, financial condition and liquidity.

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

(c) Issuer Purchases of Equity Securities.

The following table presents our common stock repurchases for the quarter ended June 30, 2020:

	Total Number of Shares Repurchased		Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs(1)		Approximate Dollar Value of Shares That May Yet be Purchased Under the Plans or Programs(1) (in millions)
April 1 to April 30		—	$	—		—	$	582.9
May 1 to May 31		—		—		—		582.9
June 1 to June 30		—		—		—		582.9
Total		—		—		—

(1) In June 2018, our Board of Directors authorized the repurchase of shares of our common stock, at such times and at prices as management determines to be advisable, up to an aggregate of $400.0 million. In September 2019, our Board of Directors authorized, upon the completion of the previously announced program, the repurchase of additional shares of our common stock at such times and at prices as management determines to be advisable, up to an aggregate of $500.0 million.

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Item 6. Exhibits.

Exhibit  Number	Description
4.1	Fourth Supplemental Indenture, dated as of May 18, 2020, by and between Alleghany Corporation and The Bank of New York Mellon, as Trustee, including the form of the Senior Notes attached as Exhibit A thereto, filed as Exhibit 4.1 to Alleghany’s Current Report on Form 8-K filed on May 18, 2020, is incorporated herein by reference.
31.1	Certification of the Chief Executive Officer of the Company pursuant to Rule 13a-14(a) or Rule 15(d)-14(a) of the Exchange Act.
31.2	Certification of the Chief Financial Officer of the Company pursuant to Rule 13a-14(a) or Rule 15(d)-14(a) of the Exchange Act.
32.1	Certification of the Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section  906 of the Sarbanes-Oxley Act of 2002. This exhibit shall not be deemed “filed” as a part of this Form 10-Q.
32.2	Certification of the Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section  906 of the Sarbanes-Oxley Act of 2002. This exhibit shall not be deemed “filed” as a part of this Form 10-Q.
101	Interactive Data Files formatted in Inline XBRL (eXtensible Business Reporting Language): (i) Consolidated Balance Sheets as of June 30, 2020 and December 31, 2019; (ii) Consolidated Statements of Earnings and Comprehensive Income for the three and six months ended June 30, 2020 and 2019; (iii) Consolidated Statements of Changes in Stockholders’ Equity for the six months ended June 30, 2020 and 2019; (iv) Consolidated Statements of Cash Flows for the six months ended June 30, 2020 and 2019; and (v) Notes to Unaudited Consolidated Financial Statements.
104	Cover Page Interactive Data File (formatted in Inline XBRL and contained in Exhibit 101).

68

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	ALLEGHANY CORPORATION
	(Registrant)
Date: August 4, 2020	By:	/s/ Kerry J. Jacobs
		Kerry J. Jacobs
		Senior Vice President and chief financial officer
		(principal financial officer)

69

EX-31.1

Exhibit 31.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Weston M. Hicks, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Alleghany Corporation (the “Registrant”);

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

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

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

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

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

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

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

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

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

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

Date: August 4, 2020

/s/ Weston M. Hicks

Weston M. Hicks

President and chief executive officer

EX-31.2

Exhibit 31.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Kerry J. Jacobs, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Alleghany Corporation (the “Registrant”);

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

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

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

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

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

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

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

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

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

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

Date: August 4, 2020

/s/ Kerry J. Jacobs

Kerry J. Jacobs

Senior Vice President and chief financial officer

EX-32.1

 Exhibit 32.1

ALLEGHANY CORPORATION

CERTIFICATION

In connection with the periodic report of Alleghany Corporation (the “Company”) on Form 10-Q for the quarter ended June 30, 2020, as filed with the Securities and Exchange Commission (the “Report”), I, Weston M. Hicks, President and chief executive officer of the Company, hereby certify as of the date hereof, solely for purposes of Title 18, Chapter 63, Section 1350 of the United States Code, that to my knowledge:

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

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company at the dates and for the periods indicated.

This Certification, which accompanies the Report, has not been, and shall not be deemed, “filed” with the Securities and Exchange Commission.

Date: August 4, 2020	By:	/s/ Weston M. Hicks
		Weston M. Hicks
		President and chief executive officer

EX-32.2

Exhibit 32.2

ALLEGHANY CORPORATION

CERTIFICATION

In connection with the periodic report of Alleghany Corporation (the “Company”) on Form 10-Q for the quarter ended June 30, 2020, as filed with the Securities and Exchange Commission (the “Report”), I, Kerry J. Jacobs, Senior Vice President and chief financial officer of the Company, hereby certify as of the date hereof, solely for purposes of Title 18, Chapter 63, Section 1350 of the United States Code, that to my knowledge:

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

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company at the dates and for the periods indicated.

This Certification, which accompanies the Report, has not been, and shall not be deemed, “filed” with the Securities and Exchange Commission.

Date: August 4, 2020	By:	/s/ Kerry J. Jacobs
		Kerry J. Jacobs
		Senior Vice President and chief financial officer

XML

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2020	Jul. 26, 2020
Cover [Abstract]
Amendment Flag	false
Document Type	10-Q
Document Period End Date	Jun. 30, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q2
Entity Registrant Name	ALLEGHANY CORP /DE
Entity Central Index Key	0000775368
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		14,312,000
Entity Shell Company	false
Entity Small Business	false
Entity Emerging Growth Company	false
Trading Symbol	Y
Title of 12(b) Security	Common Stock
Security Exchange Name	NYSE
Entity File Number	1-9371
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	51-0283071
Entity Address, Address Line One	1411 Broadway, 34th Floor
Entity Address, City or Town	NY
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10018
City Area Code	212
Local Phone Number	752-1356
Document Quarterly Report	true
Document Transition Report	false

XML

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Investments:
Equity securities	$ 1,439,062	$ 2,505,496
Debt securities	14,950,006	14,211,745
Short-term investments	1,119,678	914,776
Marketable Securities, Total	17,508,746	17,632,017
Commercial mortgage loans	685,412	686,206
Other invested assets	415,333	573,605
Total investments	18,609,491	18,891,828
Cash	1,652,671	1,179,098
Accrued investment income	91,224	96,516
Premium balances receivable	1,089,481	948,010
Reinsurance recoverables	1,539,717	1,681,962
Ceded unearned premiums	291,853	248,153
Deferred acquisition costs	551,984	522,577
Property and equipment at cost, net of accumulated depreciation and amortization	272,360	205,397
Goodwill	613,054	523,021
Intangible assets, net of amortization	808,933	685,953
Current taxes receivable		4,081
Net deferred tax assets	48,033	5,860
Funds held under reinsurance agreements	756,284	755,515
Other assets	1,295,786	1,183,633
Total assets	27,620,871	26,931,604
Liabilities, Redeemable Noncontrolling Interests and Stockholders’ Equity
Loss and loss adjustment expenses	12,051,334	11,928,359
Unearned premiums	2,773,061	2,566,170
Senior notes and other debt	2,017,903	1,751,113
Reinsurance payable	200,375	188,399
Current taxes payable	12,580
Other liabilities	1,881,473	1,516,076
Total liabilities	18,936,726	17,950,117
Redeemable noncontrolling interests	227,906	204,753
Common stock	17,460	17,460
Contributed capital	3,609,521	3,608,638
Accumulated other comprehensive income	291,993	171,350
Treasury stock	(1,495,475)	(1,455,877)
Retained earnings	6,032,740	6,435,163
Total stockholders’ equity attributable to Alleghany stockholders	8,456,239	8,776,734
Total liabilities, redeemable noncontrolling interests and stockholders’ equity	$ 27,620,871	$ 26,931,604

XML

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands		Jun. 30, 2020	Dec. 31, 2019
Statement Of Financial Position [Abstract]
Equity securities, cost		$ 997,389	$ 1,625,256
Debt securities, amortized cost		14,395,510	$ 13,798,576
Allowance for credit losses	[1]	$ 8,904
Common stock, Shares authorized		22,000,000	22,000,000
Common stock, Shares issued		17,459,961	17,459,961
Treasury stock, shares		3,148,009	3,095,333

[1] See Note 1(c) of this Form 10-Q for further information regarding Alleghany’s adoption of new credit loss accounting guidance.

XML

Consolidated Statements of Earnings and Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues
Net premiums earned	$ 1,394,868	$ 1,356,008	$ 2,839,288	$ 2,653,317
Net investment income	118,691	142,745	230,673	265,794
Change in the fair value of equity securities	242,186	143,660	(280,790)	536,013
Net realized capital gains	(38,100)	12,354	(25,074)	16,796
Change in allowance for credit losses on available for sale securities	17,021		(14,354)
Change in allowance for credit losses on available for sale securities				(10,020)
Noninsurance revenue	492,701	603,906	960,550	1,118,029
Total revenues	2,227,367	2,258,673	3,710,293	4,579,929
Costs and Expenses
Net loss and loss adjustment expenses	1,024,362	796,803	2,051,806	1,589,301
Commissions, brokerage and other underwriting expenses	410,017	444,316	851,413	864,442
Other operating expenses	510,306	581,474	976,967	1,083,892
Corporate administration	18,579	25,967	4,272	45,336
Amortization of intangible assets	12,093	8,795	21,661	15,695
Interest expense	22,194	25,129	40,550	48,660
Total costs and expenses	1,997,551	1,882,484	3,946,669	3,647,326
(Losses) earnings before income taxes	229,816	376,189	(236,376)	932,603
Income taxes	53,356	71,356	(51,364)	179,868
Net (losses) earnings	176,460	304,833	(185,012)	752,735
Net (losses) earnings attributable to noncontrolling interest	(918)	9,374	(1,172)	17,049
Net (losses) earnings attributable to Alleghany stockholders	177,378	295,459	(183,840)	735,686
Net (losses) earnings	176,460	304,833	(185,012)	752,735
Other comprehensive income (loss):
Change in unrealized gains, net of deferred taxes	411,673	172,602	135,043	355,989
Less: reclassification for net realized capital gains and change in allowance for credit losses on available for sale securities, net of taxes	(5,570)	(9,760)	(16,416)	(5,353)
Change in unrealized currency translation adjustment, net of deferred taxes	14,814	3,175	1,081	2,290
Retirement plans	419	104	936	1,041
Comprehensive (loss) income	597,796	470,954	(64,368)	1,106,702
Comprehensive (loss) income attributable to noncontrolling interests	(918)	9,374	(1,172)	17,049
Comprehensive (loss) income attributable to Alleghany stockholders	$ 598,714	$ 461,580	$ (63,196)	$ 1,089,653
Basic (losses) earnings per share attributable to Alleghany stockholders	$ 12.39	$ 20.46	$ (12.83)	$ 50.88
Diluted (losses) earnings per share attributable to Alleghany stockholders	$ 12.39	$ 20.46	$ (13.38)	$ 50.82

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Consolidated Statements of Earnings and Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Change in unrealized gains, deferred taxes	$ 109,432	$ 45,881	$ 35,898	$ 94,630
Reclassification for net realized capital gains and change in allowance for credit losses on available for sale securities, taxes	(1,481)	(2,594)	(4,364)	(1,423)
Change in unrealized currency translation adjustment, deferred taxes	$ 3,938	$ 844	$ 287	$ 608

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Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Contributed Capital	Accumulated Other Comprehensive Income (loss)	Treasury Stock	Retained Earnings
Beginning Balance at Dec. 31, 2018	$ 7,692,710	$ 17,460	$ 3,612,830	$ (202,003)	$ (1,312,939)	$ 5,577,362
Net (losses) earnings	440,227					440,227
Other comprehensive income (loss), net of tax:
Retirement plans	937			937
Change in unrealized appreciation of investments, net	187,794			187,794
Change in unrealized currency translation adjustment, net	(885)			(885)
Comprehensive (loss) income attributable to Alleghany stockholders	628,073			187,846		440,227
Treasury stock repurchase	(80,486)				(80,486)
Other, net	(3,810)		(4,176)		366
Ending Balance at Mar. 31, 2019	8,236,487	17,460	3,608,654	(14,157)	(1,393,059)	6,017,589
Redeemable noncontrolling interests balance at Dec. 31, 2018	169,762
Redeemable Non-controlling Interests
Net (losses) earnings attributable to redeemable noncontrolling interests	7,675
Comprehensive (loss) income attributable to noncontrolling interests	7,675
Other net changes to redeemable noncontrolling interests	(1,716)
Redeemable noncontrolling interests balance at Mar. 31, 2019	175,721
Beginning Balance at Dec. 31, 2018	7,692,710	17,460	3,612,830	(202,003)	(1,312,939)	5,577,362
Net (losses) earnings	735,686
Other comprehensive income (loss), net of tax:
Retirement plans	1,041
Change in unrealized currency translation adjustment, net	2,290
Comprehensive (loss) income attributable to Alleghany stockholders	1,089,653
Treasury stock repurchase	(93,200)
Ending Balance at Jun. 30, 2019	8,685,914	17,460	3,608,069	151,964	(1,404,627)	6,313,048
Redeemable noncontrolling interests balance at Dec. 31, 2018	169,762
Redeemable Non-controlling Interests
Net (losses) earnings attributable to redeemable noncontrolling interests	17,049
Comprehensive (loss) income attributable to noncontrolling interests	17,049
Redeemable noncontrolling interests balance at Jun. 30, 2019	175,572
Beginning Balance at Mar. 31, 2019	8,236,487	17,460	3,608,654	(14,157)	(1,393,059)	6,017,589
Net (losses) earnings	295,459					295,459
Other comprehensive income (loss), net of tax:
Retirement plans	104			104
Change in unrealized appreciation of investments, net	162,842			162,842
Change in unrealized currency translation adjustment, net	3,175			3,175
Comprehensive (loss) income attributable to Alleghany stockholders	461,580			166,121		295,459
Treasury stock repurchase	(12,666)				(12,666)
Other, net	513		(585)		1,098
Ending Balance at Jun. 30, 2019	8,685,914	17,460	3,608,069	151,964	(1,404,627)	6,313,048
Redeemable noncontrolling interests balance at Mar. 31, 2019	175,721
Redeemable Non-controlling Interests
Net (losses) earnings attributable to redeemable noncontrolling interests	9,374
Comprehensive (loss) income attributable to noncontrolling interests	9,374
Other net changes to redeemable noncontrolling interests	(9,523)
Redeemable noncontrolling interests balance at Jun. 30, 2019	175,572
Beginning Balance at Dec. 31, 2019	8,776,734	17,460	3,608,638	171,350	(1,455,877)	6,435,163
Cumulative effect of adoption of new accounting pronouncements at Dec. 31, 2019	(3,570)					(3,570)
Net (losses) earnings	(361,218)					(361,218)
Other comprehensive income (loss), net of tax:
Retirement plans	517			517
Change in unrealized appreciation of investments, net	(287,477)			(287,477)
Change in unrealized currency translation adjustment, net	(13,733)			(13,733)
Comprehensive (loss) income attributable to Alleghany stockholders	(661,911)			(300,693)		(361,218)
Dividends paid	(215,013)					(215,013)
Treasury stock repurchase	(44,268)				(44,268)
Other, net	5,090		1,499		3,591
Ending Balance at Mar. 31, 2020	7,857,062	17,460	3,610,137	(129,343)	(1,496,554)	5,855,362
Redeemable noncontrolling interests balance at Dec. 31, 2019	204,753
Redeemable Non-controlling Interests
Net (losses) earnings attributable to redeemable noncontrolling interests	(254)
Comprehensive (loss) income attributable to noncontrolling interests	(254)
Other net changes to redeemable noncontrolling interests	3,862
Redeemable noncontrolling interests balance at Mar. 31, 2020	208,361
Beginning Balance at Dec. 31, 2019	8,776,734	17,460	3,608,638	171,350	(1,455,877)	6,435,163
Cumulative effect of adoption of new accounting pronouncements at Dec. 31, 2019	(3,570)					(3,570)
Net (losses) earnings	(183,840)
Other comprehensive income (loss), net of tax:
Retirement plans	936
Change in unrealized currency translation adjustment, net	1,081
Comprehensive (loss) income attributable to Alleghany stockholders	(63,196)
Treasury stock repurchase	(44,300)
Ending Balance at Jun. 30, 2020	8,456,239	17,460	3,609,521	291,993	(1,495,475)	6,032,740
Redeemable noncontrolling interests balance at Dec. 31, 2019	204,753
Redeemable Non-controlling Interests
Net (losses) earnings attributable to redeemable noncontrolling interests	(1,172)
Comprehensive (loss) income attributable to noncontrolling interests	(1,172)
Redeemable noncontrolling interests balance at Jun. 30, 2020	227,906
Beginning Balance at Mar. 31, 2020	7,857,062	17,460	3,610,137	(129,343)	(1,496,554)	5,855,362
Net (losses) earnings	177,378					177,378
Other comprehensive income (loss), net of tax:
Retirement plans	419			419
Change in unrealized appreciation of investments, net	406,103			406,103
Change in unrealized currency translation adjustment, net	14,814			14,814
Comprehensive (loss) income attributable to Alleghany stockholders	598,714			421,336		177,378
Other, net	463		(616)		1,079
Ending Balance at Jun. 30, 2020	8,456,239	$ 17,460	$ 3,609,521	$ 291,993	$ (1,495,475)	$ 6,032,740
Redeemable noncontrolling interests balance at Mar. 31, 2020	208,361
Redeemable Non-controlling Interests
Net (losses) earnings attributable to redeemable noncontrolling interests	(918)
Comprehensive (loss) income attributable to noncontrolling interests	(918)
Other net changes to redeemable noncontrolling interests	20,463
Redeemable noncontrolling interests balance at Jun. 30, 2020	$ 227,906

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Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - shares	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
Statement Of Stockholders Equity [Abstract]
Common stock, Shares issued	17,459,961	17,459,961	17,459,961	17,459,961	17,459,961	17,459,961
Treasury stock, shares	3,148,009	3,150,279	3,095,333	3,029,099	3,012,224	2,883,452

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Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities
Net (losses) earnings	$ (185,012)	$ 752,735
Adjustments to reconcile net earnings to net cash provided by (used in) operating activities:
Depreciation and amortization	73,417	56,942
Change in the fair value of equity securities	280,790	(536,013)
Net realized capital (gains) losses	25,074	(16,796)
Change in allowance for credit losses on available for sale securities	14,354
Change in allowance for credit losses on available for sale securities		10,020
(Increase) decrease in reinsurance recoverables, net of reinsurance payable	154,221	271,113
(Increase) decrease in premium balances receivable	(141,471)	(122,872)
(Increase) decrease in ceded unearned premiums	(43,700)	(22,084)
(Increase) decrease in deferred acquisition costs	(29,407)	(38,099)
(Increase) decrease in funds held under reinsurance agreements	(769)	14,471
Increase (decrease) in unearned premiums	206,891	197,072
Increase (decrease) in loss and loss adjustment expenses	122,975	(618,496)
Change in unrealized foreign currency exchange rate losses (gains)	53,465	(6,370)
Other, net	(221,491)	231,955
Net adjustments	494,349	(579,157)
Net cash provided by (used in) operating activities	309,337	173,578
Cash flows from investing activities
Purchases of debt securities	(3,813,237)	(4,197,740)
Purchases of equity securities	(605,415)	(134,894)
Sales of debt securities	2,380,250	1,876,234
Maturities and redemptions of debt securities	788,886	443,555
Sales of equity securities	1,391,193	1,950,478
Net (purchases) sales of short-term investments	(197,843)	(156,700)
Net (purchases) sales and maturities of commercial mortgage loans	(794)	(14,905)
(Purchases) sales of property and equipment	(17,784)	(23,942)
Purchases of affiliates and subsidiaries, net of cash acquired	(123,939)	(64,084)
Other, net	470,018	8,842
Net cash provided by (used in) investing activities	271,335	(313,156)
Cash flows from financing activities
Repayment of senior notes	(307,095)
Treasury stock acquisitions	(44,268)	(93,152)
Proceeds from issuance of senior notes	499,335
Debt issue costs paid	(4,550)
Increase (decrease) in other debt	(32,171)	46,006
Cash dividends paid	(215,013)
Other, net	1,898	(31,344)
Net cash provided by (used in) financing activities	(101,864)	(78,490)
Effect of foreign exchange rate changes on cash	(5,235)	4,123
Net increase (decrease) in cash	473,573	(213,945)
Cash at beginning of period	1,179,098	1,038,763
Cash at end of period	1,652,671	824,818
Supplemental disclosures of cash flow information
Interest paid	45,430	48,203
Income taxes paid (refund received)	$ 38,222	$ (20,672)

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Summary of Significant Accounting Principles

6 Months Ended

Jun. 30, 2020

Accounting Policies [Abstract]

Summary of Significant Accounting Principles

1. Summary of Significant Accounting Principles

(a) Principles of Financial Statement Presentation

This Quarterly Report on Form 10-Q (this “Form 10-Q”) should be read in conjunction with the Annual Report on Form 10-K for the year ended December 31, 2019 (the “2019 Form 10-K”) and the Quarterly Report on Form 10-Q for the quarter ended March 31, 2020 of Alleghany Corporation (“Alleghany”).

Alleghany Corporation, a Delaware corporation, owns and supports certain operating subsidiaries and manages investments, anchored by a core position in property and casualty reinsurance and insurance. Through its wholly-owned subsidiary Transatlantic Holdings, Inc. (“TransRe”), an Alleghany subsidiary since March 2012, Alleghany is engaged in the property and casualty reinsurance business. Through its wholly-owned subsidiary Alleghany Insurance Holdings LLC (“AIHL”), Alleghany is engaged in the property and casualty insurance business. AIHL’s insurance operations are principally conducted by its subsidiaries RSUI Group, Inc. (“RSUI”) and CapSpecialty, Inc. (“CapSpecialty”). RSUI and CapSpecialty have been subsidiaries of AIHL since July 2003 and January 2002, respectively. AIHL Re LLC (“AIHL Re”), a captive reinsurance company, which provides reinsurance to Alleghany’s current and former insurance operating subsidiaries and affiliates, has been a subsidiary of Alleghany since its formation in May 2006.

Although Alleghany’s primary sources of revenues and earnings are its reinsurance and insurance operations and investments, Alleghany also generates revenues and expenses from a diverse portfolio of non-financial businesses that are owned and managed through its wholly-owned subsidiary Alleghany Capital Corporation (“Alleghany Capital”). Alleghany Capital’s businesses include:

• Precision Cutting Technologies, Inc. (“PCT”), a holding company headquartered in Rockford, Illinois, with four operating businesses: (i) Bourn & Koch, Inc., a provider of precision automated machine tool solutions; (ii) Diamond Technology Innovations, Inc., a manufacturer of waterjet orifices and nozzles and a provider of related services; (iii) Coastal Industrial Distributors, LLC, a provider of high-performance solid carbide end mills; and (iv) as of March 2020, Supermill LLC, a manufacturer of high-performance carbide end mills;

• R.C. Tway Company, LLC (“Kentucky Trailer”), a manufacturer of custom trailers and truck bodies for the moving and storage industry and other markets, headquartered in Louisville, Kentucky;

• IPS-Integrated Project Services, LLC (“IPS”), a design, engineering, procurement, construction management and validation service provider focused on the global pharmaceutical and biotechnology industries, headquartered in Blue Bell, Pennsylvania;

• Jazwares, LLC (together with its affiliates, “Jazwares”), a global toy and musical instrument company, headquartered in Sunrise, Florida;

• WWSC Holdings, LLC (“W&W|AFCO Steel”), a structural steel fabricator and erector, headquartered in Oklahoma City, Oklahoma;

• CHECO Holdings, LLC (“Concord”), a hotel management and development company, headquartered in Raleigh, North Carolina; and

• Wilbert Funeral Services, Inc. (“Wilbert”), a provider of products and services for the funeral and cemetery industries and precast concrete markets, headquartered in Overland Park, Kansas.

On April 1, 2020, Alleghany Capital acquired an additional approximately 55 percent of Wilbert it previously did not own, bringing its equity interest in Wilbert to approximately 100 percent, and as of that date, the results of Wilbert were included in Alleghany’s consolidated results. Prior to April 1, 2020, Wilbert was accounted for under the equity method of accounting and was included in other invested assets.

In addition, Alleghany owns certain other holding-company investments. Alleghany’s wholly-owned subsidiary Stranded Oil Resources Corporation (“SORC”) is an exploration and production company focused on enhanced oil recovery, headquartered in Golden, Colorado. Alleghany’s wholly-owned subsidiary Alleghany Properties Holdings LLC (“Alleghany Properties”) owns and manages certain properties in the Sacramento, California region. Alleghany’s public equity investments are managed primarily through Alleghany’s wholly-owned subsidiary Roundwood Asset Management LLC.

Unless the context otherwise requires, references to “Alleghany” include Alleghany together with its subsidiaries.

The accompanying consolidated financial statements include the results of Alleghany and its wholly-owned and majority-owned subsidiaries and have been prepared in accordance with accounting principles generally accepted in the U.S. (“GAAP”). All material inter-company balances and transactions have been eliminated in consolidation.

The portion of stockholders’ equity, net earnings and comprehensive income that is not attributable to Alleghany stockholders is presented on the consolidated balance sheets, the consolidated statements of earnings and comprehensive income and the consolidated statements of changes in stockholders’ equity as noncontrolling interests. Because all noncontrolling interests have the option to sell their ownership interests to Alleghany in the future (generally through 2024), the portion of stockholders’ equity that is not attributable to Alleghany stockholders is presented on the consolidated balance sheets and the consolidated statements of changes in stockholders’ equity as redeemable noncontrolling interests for all periods presented. In addition, Alleghany accretes the redeemable noncontrolling interests up to their future estimated redemption value over the period from the date of issuance to the earliest redemption date. The redemption value of the equity interests is generally based on the subsidiary’s earnings in specified periods preceding the applicable redemption date, calculated based on either a specified formula or an independent fair market valuation. During the first six months of 2020, the noncontrolling interests outstanding were approximately as follows: Kentucky Trailer - 23 percent; IPS - 15 percent; Jazwares - 24 percent; W&W|AFCO Steel - 20 percent; and Concord - 15 percent. Prior to April 1, 2019, the noncontrolling interests of PCT were approximately 11 percent.  All noncontrolling interest holders of PCT have exercised their repurchase options and sold their ownership interests to PCT effective April 1, 2019.

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions. These estimates and assumptions affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements, as well as the reported amounts of revenues and expenses during the reporting period. Alleghany relies on historical experience and on various other assumptions that it believes to be reasonable under the circumstances to make judgments about the carrying value of assets and liabilities and reported revenues and expenses that are not readily apparent from other sources. Actual results may differ materially from those reported results to the extent that those estimates and assumptions prove to be inaccurate. Changes in estimates are reflected in the consolidated statements of earnings and comprehensive income in the period in which the changes are made.

(b) Other Significant Accounting Principles

Alleghany’s significant accounting principles can be found in Note 1 to Notes to Consolidated Financial Statements set forth in Part II, Item 8, “Financial Statements and Supplementary Data” of the 2019 Form 10-K.

(c) Recent Accounting Standards

Recently Adopted - 2019  

In February 2016, the Financial Accounting Standards Board (the “FASB”) issued guidance on leases. Under this guidance, a lessee is required to recognize lease liabilities and corresponding right-of-use assets for leases with terms of more than one year, whereas under the prior guidance, a lessee was only required to recognize assets and liabilities for those leases qualifying as capital leases. This guidance also requires new disclosures about the amount, timing and uncertainty of cash flows arising from leases. The accounting by lessors remains largely unchanged. This guidance became effective in the first quarter of 2019 for public companies, with early adoption permitted. A modified retrospective transition approach was elected for all leases in existence as of, or entered into after, the beginning of the earliest comparative period presented in the financial statements. Alleghany adopted this guidance in the first quarter of 2019 and the implementation did not have a material impact on its results of operations and financial condition. As part of its implementation, Alleghany elected to not separate lease components from non-lease components (such as office cleanings, security and maintenance services provided by Alleghany’s lessors for certain of its leases). Alleghany also elected the package of practical expedients under the transition guidance, which allowed Alleghany to not reevaluate existing lease classifications, among others. As of January 1, 2019, Alleghany’s adoption of this guidance resulted in recognition of an additional right-of-use asset of approximately $0.2 billion and a corresponding lease liability of $0.2 billion. See Note 12(b) to Notes to Consolidated Financial Statements set forth in Part II, Item 8, “Financial Statements and Supplementary Data” of the 2019 Form 10-K for further information on Alleghany’s leases.

In August 2017, the FASB issued guidance that simplifies the requirements to achieve hedge accounting, better reflects the economic results of hedging in financial statements and improves the alignment between hedge accounting and a company’s risk management activities. This guidance was effective in the first quarter of 2019 for public companies, with early adoption permitted. Alleghany adopted this guidance in the first quarter of 2019 and the implementation did not have a material impact on its results of operations and financial condition.

Recently Adopted – 2020  

In June 2016, the FASB issued guidance on credit losses. Under this guidance, a company is required to measure all expected credit losses on loans, reinsurance recoverables and other financial assets accounted for at cost or amortized cost, as applicable, over the remaining expected life of such assets. Estimates of expected credit losses are to be based on historical experience, current conditions and reasonable and supportable forecasts. Under former FASB guidance, credit losses on these assets generally required a company to recognize credit losses when it was probable that a loss had been incurred. Credit losses for securities accounted for on an available for sale (“AFS”) basis are to be measured in a manner similar to GAAP as applied under former guidance and cannot exceed the amount by which the fair value is less than the amortized cost, although the new guidance removes the length of time a security has been in an unrealized loss position as a possible indication of a credit impairment. Credit losses for all financial assets are to be recorded through an allowance for credit losses. Subsequent reversals in credit loss estimates are permitted and are to be recognized in earnings. This guidance also requires new disclosures about the significant estimates and judgments used in estimating credit losses, as well as the credit quality of financial assets. This guidance was effective in the first quarter of 2020 for public companies, with early adoption permitted. Alleghany adopted this guidance in the first quarter of 2020.

As of January 1, 2020, Alleghany increased its allowances for credit losses on certain financial assets accounted for at cost or amortized cost by $4.5 million and recorded an after-tax cumulative effect reduction in opening retained earnings of $3.6 million.  The increase in allowances for credit losses primarily relates to reinsurance recoverables and commercial mortgage loans. See Note 4 of this Form 10-Q for further information on Alleghany’s reinsurance recoverables and Note 3(i) of this Form 10-Q for further information on Alleghany’s investments in commercial mortgage loans.  The increase in allowances for credit losses also relates to premium balances receivable. Estimates of expected credit losses for all of these assets are based on certain market-based indicators of credit quality, which are updated on an annual basis and re-assessed at least quarterly. Related credit loss expenses are recorded as a component of other operating expenses.  

As of January 1, 2020, credit losses for Alleghany’s AFS securities are recorded through an allowance for credit losses on the consolidated balance sheets and as a change in allowance for credit losses on AFS securities in the consolidated statements of earnings and comprehensive income.  See Note 3(f) of this Form 10-Q for further information on the credit quality for Alleghany’s AFS securities.

In January 2017, the FASB issued guidance that simplifies the subsequent measurement of goodwill. Under this guidance, if an initial qualitative assessment indicates that the fair value of an operating subsidiary may be less than its carrying amount, an impairment charge is recognized for the amount by which the carrying amount of the operating subsidiary exceeds its estimated fair value. Any resulting impairment loss recognized cannot exceed the total amount of goodwill associated with the operating subsidiary. This guidance was effective in the first quarter of 2020 for public companies, with early adoption permitted. Alleghany adopted this guidance in the first quarter of 2020 and the implementation did not have a material impact on its results of operations and financial condition. See Note 2 to Notes to Consolidated Financial Statements set forth in Part II, Item 8, “Financial Statements and Supplementary Data” of the 2019 Form 10-K for further information on Alleghany’s goodwill.

In August 2018, the FASB issued guidance that changes the financial statement disclosure requirements for measuring fair value. With respect to financial instruments classified as “Level 3” in the fair value disclosure hierarchy, the guidance requires certain additional disclosures for public companies related to amounts included in other comprehensive income and significant unobservable inputs used in the valuation, while removing disclosure requirements related to an entity’s overall valuation processes. The guidance also removes certain disclosure requirements related to transfers between financial instruments classified as “Level 1” and “Level 2” and provides clarification on certain other existing disclosure requirements. This guidance was effective for interim and annual periods beginning after December 15, 2019, with early adoption permitted with respect to any eliminated or modified disclosures. Alleghany adopted this guidance in the first quarter of 2020 and the implementation did not impact its results of operations or financial condition. See Note 2 of this Form 10-Q for further information on the fair value of Alleghany’s financial instruments.

In March 2020, the FASB issued guidance to expedite and simplify the accounting associated with the anticipated migration away from the widely-used London Inter-bank Offered Rate and other similar rates as benchmark interest rates after 2021.  Under pre-existing GAAP, such modifications made to: (i) loans and certain other contracts would require re-assessments of the accounting for those contacts, such as whether they were extinguished and remeasured from an accounting perspective; and (ii) derivative contracts may cause a change in accounting, such as a possible dedesignation of hedge accounting. This new guidance largely eliminates these requirements as a result of this migration to one or more new benchmark rates and is generally applicable for contract modifications made prior to December 31, 2022. Alleghany adopted this guidance in March 2020 and the implementation did not have an impact on its results of operations and financial condition.

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Fair Value of Financial Instruments

6 Months Ended

Jun. 30, 2020

Fair Value Disclosures [Abstract]

Fair Value of Financial Instruments

2. Fair Value of Financial Instruments

The following table presents the carrying value and estimated fair value of Alleghany’s consolidated financial instruments as of June 30, 2020 and December 31, 2019:

	June 30, 2020				December 31, 2019
	Carrying Value		Fair Value		Carrying Value		Fair Value
	($ in millions)
Assets
Investments (excluding equity method investments and loans)(1)	$	17,509.1	$	17,509.1	$	17,632.3	$	17,632.3
Liabilities
Senior notes and other debt(2)	$	2,017.9	$	2,283.2	$	1,751.1	$	1,962.7

(1) This table includes debt and equity securities, as well as partnership and non-marketable equity investments accounted for at fair value that are included in other invested assets. This table excludes investments accounted for using the equity method and commercial mortgage loans that are accounted for at unpaid principal balance. The fair value of short-term investments approximates amortized cost. The fair value of all other categories of investments is disclosed below.

(2) See Note 11 of this Form 10-Q for additional information on the senior notes and other debt.

The following tables present Alleghany’s financial instruments measured at fair value and the level of the fair value hierarchy of inputs used as of June 30, 2020 and December 31, 2019:

	Level 1		Level 2		Level 3		Total
	($ in millions)
As of June 30, 2020
Equity securities:
Common stock	$	1,430.5	$	3.5	$	—	$	1,434.0
Preferred stock		—		3.1		2.0		5.1
Total equity securities		1,430.5		6.6		2.0		1,439.1
Debt securities:
U.S. government obligations		—		1,155.7		—		1,155.7
Municipal bonds		—		2,386.2		—		2,386.2
Foreign government obligations		—		766.8		—		766.8
U.S. corporate bonds		—		3,381.9		620.5		4,002.4
Foreign corporate bonds		—		1,116.7		171.4		1,288.1
Mortgage and asset-backed securities:
Residential mortgage-backed securities (“RMBS”)(1)		—		2,143.3		2.5		2,145.8
Commercial mortgage-backed securities (“CMBS”)		—		865.8		5.5		871.3
Other asset-backed securities(2)		—		1,570.7		763.0		2,333.7
Total debt securities		—		13,387.1		1,562.9		14,950.0
Short-term investments		—		1,119.7		—		1,119.7
Other invested assets(3)		—		—		0.3		0.3
Total investments (excluding equity method investments and loans)	$	1,430.5	$	14,513.4	$	1,565.2	$	17,509.1
Senior notes and other debt	$	—	$	1,844.9	$	438.3	$	2,283.2

	Level 1		Level 2		Level 3		Total
	($ in millions)
As of December 31, 2019
Equity securities:
Common stock	$	2,498.1	$	3.3	$	—	$	2,501.4
Preferred stock		—		2.1		2.0		4.1
Total equity securities		2,498.1		5.4		2.0		2,505.5
Debt securities:
U.S. government obligations		—		1,215.0		—		1,215.0
Municipal bonds		—		2,307.9		—		2,307.9
Foreign government obligations		—		690.7		—		690.7
U.S. corporate bonds		—		2,754.0		605.0		3,359.0
Foreign corporate bonds		—		1,208.7		168.7		1,377.4
Mortgage and asset-backed securities:
RMBS(1)		—		1,838.5		1.9		1,840.4
CMBS		—		865.9		5.8		871.7
Other asset-backed securities(2)		—		1,692.9		856.7		2,549.6
Total debt securities		—		12,573.6		1,638.1		14,211.7
Short-term investments		—		914.8		—		914.8
Other invested assets(3)		—		—		0.3		0.3
Total investments (excluding equity method investments and loans)	$	2,498.1	$	13,493.8	$	1,640.4	$	17,632.3
Senior notes and other debt	$	—	$	1,595.6	$	367.1	$	1,962.7

(1) Primarily includes government agency pass-through securities guaranteed by a government agency or government sponsored enterprise, among other types of RMBS.

(2) Includes $748.5 million and $834.2 million of collateralized loan obligations as of June 30, 2020 and December 31, 2019, respectively.

(3) Includes partnership and non-marketable equity investments accounted for at fair value, and excludes investments accounted for using the equity method.

In the three and six months ended June 30, 2020, Alleghany transferred out of Level 3 $3.1 million and $17.8 million, respectively, of financial instruments, principally due to an increase in observable inputs related to the valuation of such assets. Specifically, during the first six months of 2020, there was a decrease in the weight given to non-binding broker quotes and, as a result, there was a corresponding increase in quoted prices for similar assets in active markets. Of the $17.8 million of transfers, $14.5 million related to other asset-backed securities, with the remainder related to foreign corporate bonds.

In the three and six months ended June 30, 2019, Alleghany transferred into Level 3 $1.3 million and $16.0 million, respectively, of financial instruments, principally due to a decrease in observable inputs related to the valuation of such assets.  Specifically, during the first six months of 2019, there was an increase in the weight given to non-binding broker quotes and, as a result, there was a corresponding decrease in quoted prices for similar assets in active markets. Of the $16.0 million of transfers, $14.7 million related to foreign corporate bonds and $1.3 million related to U.S. corporate bonds.

In the three and six months ended June 30, 2019, Alleghany transferred out of Level 3 $13.9 million and $14.9 million, respectively, of financial instruments, principally due to an increase in observable inputs related to the valuation of such assets. Specifically, during the first six months of 2019, there was a decrease in the weight given to non-binding broker quotes, and as a result, there was a corresponding increase in quoted prices for similar assets in active markets. Of the $14.9 million of transfers, $12.1 million related to other asset-backed securities, with the remainder related to other types of debt securities.

The following tables present reconciliations of the changes in Level 3 assets during the six months ended June 30, 2020 and 2019 measured at fair value:

			Debt Securities
									Mortgage and asset-backed
Six Months Ended June 30, 2020	Preferred Stock		U.S. Corporate Bonds			Foreign Corporate Bonds			RMBS			CMBS			Other Asset- backed Securities			Other Invested Assets(1)		Total
	($ in millions)
Balance as of January 1, 2020	$	2.0	$	605.0		$	168.7		$	1.9		$	5.8		$	856.7		$	0.3	$	1,640.4
Net realized/unrealized gains (losses) included in:
Net earnings (losses)(2)		—		(3.8	)		0.1			—			—			(9.5	)		—		(13.2	)
Other comprehensive income (loss)		—		14.6			3.2			(0.2	)		(0.3	)		(24.4	)		—		(7.1	)
Purchases		—		14.0			12.7			1.0			—			46.6			—		74.3
Sales		—		—			(0.8	)		—			—			(54.7	)		—		(55.5	)
Issuances		—		—			—			—			—			—			—		—
Settlements		—		(9.3	)		(9.2	)		(0.2	)		—			(37.2	)		—		(55.9	)
Transfers into Level 3		—		—			—			—			—			—			—		—
Transfers out of Level 3		—		—			(3.3	)		—			—			(14.5	)		—		(17.8	)
Balance as of June 30, 2020	$	2.0	$	620.5		$	171.4		$	2.5		$	5.5		$	763.0		$	0.3	$	1,565.2

				Debt Securities
										Mortgage and asset-backed
Six Months Ended June 30, 2019	Preferred Stock			U.S. Corporate Bonds			Foreign Corporate Bonds			CMBS			Other Asset- backed Securities			Other Invested Assets(1)			Total
	($ in millions)
Balance as of January 1, 2019	$	5.4		$	425.7		$	126.9		$	—		$	1,266.9		$	0.7		$	1,825.6
Net realized/unrealized gains (losses) included in:
Net (losses)(2)		(1.6	)		(10.0	)		(0.1	)		—			(0.7	)		(0.2	)		(12.6	)
Other comprehensive income (loss)		—			31.3			5.4			—			20.5			(0.1	)		57.1
Purchases		0.3			90.9			13.9			0.2			56.8			0.1			162.2
Sales		—			—			(5.6	)		—			(300.2	)		—			(305.8	)
Issuances		—			—			—			—			—			—			—
Settlements		—			(3.6	)		(7.7	)		—			(71.5	)		—			(82.8	)
Transfers into Level 3		—			1.3			14.7			—			—			—			16.0
Transfers out of Level 3		—			(1.0	)		(1.6	)		(0.2	)		(12.1	)		—			(14.9	)
Balance as of June 30, 2019	$	4.1		$	534.6		$	145.9		$	-		$	959.7		$	0.5		$	1,644.8

(1) Includes partnership and non-marketable equity investments accounted for at fair value.

(2) There were no credit losses recorded in net earnings related to Level 3 assets still held as of June 30, 2020 and 2019.

With respect to changes in Level 3 liabilities during the first six months of 2020, the increase in senior notes and other debt primarily reflects the impact of Wilbert’s April 1, 2020 inclusion in Alleghany’s consolidated results, as discussed above.

Although Alleghany is responsible for the determination of the fair value of Alleghany’s financial assets and the supporting methodologies and assumptions, it employs third-party valuation service providers to gather, analyze and interpret market information and derive fair values based upon relevant methodologies and assumptions for individual instruments. When those providers are unable to obtain sufficient market observable information upon which to estimate the fair value for a particular security, fair value is determined either by requesting a quote, which is generally non-binding, from brokers who are knowledgeable about these securities or by employing widely accepted valuation models. As of June 30, 2020 and December 31, 2019, the fair value for the vast majority of debt securities included in Level 3 was provided by such third-party valuation service providers, and as such, valuation details on these securities are generally not available to Alleghany.

Alleghany employs specific control processes to determine the reasonableness of the fair values of its financial assets and liabilities. Alleghany’s processes are designed to ensure that the values received or internally estimated are accurately recorded and that the data inputs and the valuation techniques used are appropriate, consistently applied and that the assumptions are reasonable and consistent with the objective of determining fair value. Alleghany assesses the reasonableness of individual security values received from valuation service providers through various analytical techniques. In addition, Alleghany validates the reasonableness of fair values by comparing information obtained from Alleghany’s valuation service providers to other third-party valuation sources for selected securities. Alleghany also validates prices obtained from brokers for selected securities through reviews by those who have relevant expertise and who are independent of those charged with executing investing transactions. See Note 1(c) to Notes to Consolidated Financial Statements set forth in Part II, Item 8, “Financial Statements and Supplementary Data” of the 2019 Form 10-K for Alleghany’s accounting policy on fair value.

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Investments

6 Months Ended

Jun. 30, 2020

Investments [Abstract]

Investments

3. Investments

(a) Unrealized Gains and Losses

The following tables present the amortized cost and the fair value of AFS securities as of June 30, 2020 and December 31, 2019:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Allowance for Credit Losses(2)			Fair Value
	($ in millions)
As of June 30, 2020
Debt securities:
U.S. government obligations	$	1,102.2	$	53.8	$	(0.3	)	$	—		$	1,155.7
Municipal bonds		2,246.8		141.2		(1.8	)		—			2,386.2
Foreign government obligations		733.7		33.6		(0.5	)		—			766.8
U.S. corporate bonds		3,758.5		261.0		(9.5	)		(7.6	)		4,002.4
Foreign corporate bonds		1,252.5		42.5		(6.0	)		(0.9	)		1,288.1
Mortgage and asset-backed securities:
RMBS		2,063.7		82.7		(0.6	)		—			2,145.8
CMBS		862.5		33.8		(25.0	)		—			871.3
Other asset-backed securities(1)		2,375.6		37.8		(79.3	)		(0.4	)		2,333.7
Total debt securities		14,395.5		686.4		(123.0	)		(8.9	)		14,950.0
Short-term investments		1,119.7		—		—			—			1,119.7
Total investments	$	15,515.2	$	686.4	$	(123.0	)	$	(8.9	)	$	16,069.7

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	($ in millions)
As of December 31, 2019
Debt securities:
U.S. government obligations	$	1,198.5	$	19.3	$	(2.8	)	$	1,215.0
Municipal bonds		2,190.5		118.7		(1.3	)		2,307.9
Foreign government obligations		675.9		16.4		(1.6	)		690.7
U.S. corporate bonds		3,206.2		155.1		(2.3	)		3,359.0
Foreign corporate bonds		1,348.1		32.2		(2.9	)		1,377.4
Mortgage and asset-backed securities:
RMBS		1,785.1		56.1		(0.8	)		1,840.4
CMBS		849.9		23.2		(1.4	)		871.7
Other asset-backed securities(1)		2,544.5		24.8		(19.7	)		2,549.6
Total debt securities		13,798.7		445.8		(32.8	)		14,211.7
Short-term investments		914.8		—		—			914.8
Total investments	$	14,713.5	$	445.8	$	(32.8	)	$	15,126.5

(1) Includes $748.5 million and $834.2 million of collateralized loan obligations as of June 30, 2020 and December 31, 2019, respectively.

(2) See Note 1(c) of this Form 10-Q for further information regarding Alleghany’s adoption of new credit loss accounting guidance.

(b) Contractual Maturity

The following table presents the amortized cost and estimated fair value of debt securities by contractual maturity as of June 30, 2020. 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.

	Amortized Cost		Fair Value
	($ in millions)
As of June 30, 2020
Short-term investments due in one year or less	$	1,119.7	$	1,119.7
Mortgage and asset-backed securities(1)		5,301.8		5,350.8
Debt securities with maturity dates:
One year or less		423.1		427.2
Over one through five years		3,431.6		3,568.9
Over five through ten years		3,172.4		3,363.3
Over ten years		2,066.6		2,239.8
Total debt securities	$	14,395.5	$	14,950.0

(1) Mortgage and asset-backed securities by their nature do not generally have single maturity dates.

(c) Net Investment Income

The following table presents net investment income for the three and six months ended June 30, 2020 and 2019:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2020			2019			2020			2019
	($ in millions)
Interest income	$	109.2		$	127.2		$	228.5		$	246.5
Dividend income		5.2			9.4			15.2			19.2
Investment expenses		(7.2	)		(7.2	)		(14.4	)		(14.7	)
Partnerships and other investment results		11.5			13.3			1.4			14.8
Total	$	118.7		$	142.7		$	230.7		$	265.8

As of June 30, 2020, non-income producing invested assets were immaterial.

(d) Change in the Fair Value of Equity Securities

The following table presents changes in the fair value of equity securities for the three and six months ended June 30, 2020 and 2019:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2020		2019		2020			2019
	($ in millions)
Change in the fair value of equity securities sold during the period	$	50.7	$	11.8	$	(114.2	)	$	73.9
Change in the fair value of equity securities held at the end of the    period		191.5		131.9		(166.6	)		462.1
Change in the fair value of equity securities	$	242.2	$	143.7	$	(280.8	)	$	536.0

(e) Realized Gains and Losses

The proceeds from sales of debt and equity securities were $1.2 billion and $1.3 billion for the three months ended June 30, 2020 and 2019, respectively, and $3.8 billion and $3.8 billion for the six months ended June 30, 2020 and 2019, respectively.

Realized capital gains and losses for the three and six months ended June 30, 2020 and 2019 primarily reflect the sale of debt securities. For the three and six months ended June 30, 2020, realized capital gains and losses also include: (i) impairment charges of $44.5 million and $74.4 million, respectively, from write-downs of SORC oil field assets; and (ii) a gain of $16.3 million on April 1, 2020 in connection with Alleghany Capital’s acquisition of an additional approximately 55 percent of Wilbert that it did not previously own, and its pre-existing approximately 45 percent equity ownership was remeasured at estimated fair value (the “Wilbert Remeasurement Gain”).  SORC’s oil field assets are held for sale and consequently, were written down to estimated fair value, which reflects a significant decline in oil prices, less costs to sell.  For the six months ended June 30, 2020, realized capital gains and losses also include: (i) a $5.0 million realized gain from a reduction of certain contingent consideration liabilities at the PCT-level in connection with its acquisition of a provider of high-performance solid carbide end mills in June 2019; and (ii) a $7.1 million realized loss as a result of an early redemption of debt (see Note 11(a) of this Form 10-Q for further information on this early redemption).

The following table presents amounts of gross realized capital gains and gross realized capital losses for the three and six months ended June 30, 2020 and 2019:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2020			2019			2020			2019
	($ in millions)
Gross realized capital gains	$	28.5		$	13.6		$	87.4		$	25.7
Gross realized capital (losses)		(66.6	)		(1.2	)		(112.5	)		(8.9	)
Net realized capital gains	$	(38.1	)	$	12.4		$	(25.1	)	$	16.8

Gross realized capital losses exclude change in allowance for credit losses on AFS securities, as discussed below.

(f) Credit quality for AFS securities

Alleghany holds its debt securities as AFS and, as such, these securities are recorded at fair value. Credit losses for AFS securities are recorded through an allowance for credit losses. Changes in the allowance for credit losses are recorded for (or as a reversal of) credit losses on AFS securities.  Any portion of a decline in fair value related to a debt security that is believed to arise from factors other than credit is recorded as a component of other comprehensive income rather than charged against earnings.

Alleghany continually monitors the difference between amortized cost and the estimated fair value of its debt investments. The analysis of a security’s decline in value is performed in its functional currency.  Debt securities in an unrealized loss position are evaluated for credit losses if they meet any of the following criteria: (i) they are trading at a discount of at least 20 percent to amortized cost and have a credit rating below investment grade or are not rated; (ii) there has been a negative credit or news event with respect to the issuer that could indicate the existence of a credit loss; or (iii) Alleghany intends to sell, or it is more likely than not that Alleghany will sell, the debt security before recovery of its amortized cost basis.

If Alleghany intends to sell, or it is more likely than not that Alleghany will sell, a debt security before recovery of its amortized cost basis, the total amount of the unrealized loss position is recognized as a credit loss in earnings. To the extent that a debt security that is in an unrealized loss position is not impaired based on the preceding, Alleghany will consider a debt security to be impaired when it believes it to be probable that Alleghany will not be able to collect the entire amortized cost basis. For debt securities in an unrealized loss position as of the end of each quarter, Alleghany develops a best estimate of the present value of expected cash flows. If the results of the cash flow analysis indicate that Alleghany will not recover the full amount of its amortized cost basis in the debt security, Alleghany records a credit loss in earnings equal to the difference between the present value of expected cash flows and the amortized cost basis of the debt security. If applicable, the difference between the total unrealized loss position on the debt security and the total loss recognized in earnings is the non-credit related portion, which is recorded as a component of other comprehensive income.

In developing the cash flow analyses for debt securities, Alleghany considers various factors for the different categories of debt securities. For municipal bonds, Alleghany takes into account the taxing power of the issuer, source of revenue, credit risk and enhancements and pre-refunding. For mortgage and asset-backed securities, Alleghany discounts its best estimate of future cash flows at an effective rate equal to the original effective yield of the security or, in the case of floating rate securities, at the current coupon. Alleghany’s models include assumptions about prepayment speeds, default and delinquency rates, underlying collateral (if any), credit ratings, credit enhancements and other observable market data. For corporate bonds, Alleghany reviews business prospects, credit ratings and available information from asset managers and rating agencies for individual securities.

Change in allowance for credit losses on AFS securities in the first six months of 2020 reflect $14.4 million of unrealized losses on debt securities, primarily related to the energy sector and lower-quality corporate bonds in other sectors due to a significant decline in their fair value relative to their amortized costs. The $14.4 million is net of a $17.0 million reduction of the allowance for credit losses on AFS securities in the second quarter of 2020, arising primarily from the improved bond market conditions and bond sales.

Change in allowance for credit losses on AFS securities in the first six months of 2019 reflect $10.0 million of unrealized losses on debt securities, primarily related to the energy sector and the deterioration of creditworthiness of the issuers. Of the $10.0 million of the change in allowance for credit losses on AFS securities, none were incurred in the second quarter of 2019.

The following table presents a rollforward of Alleghany’s allowance for credit losses on AFS securities for the three and six months ended June 30, 2020:

	Three Months Ended			Six Months Ended
	June 30, 2020			June 30, 2020
Allowance for Credit Losses	($ in millions)
Beginning balance	$	31.4		$	—
Beginning balance - cumulative effect of an accounting change(1)		—			—
Provision for credit losses		(17.0	)		14.4
Charge-offs		(5.5	)		(5.5	)
Recoveries		—			—
Balance as of June 30, 2020	$	8.9		$	8.9

(1) See Note 1(c) of this Form 10-Q for further information regarding Alleghany’s adoption of new credit loss accounting guidance.

The gross unrealized investment losses for debt securities as of June 30, 2020 were deemed to be temporary, based on, among other factors: (i) the relative magnitude to which the fair value of these investments had been below cost were not indicative of a credit loss; (ii) the absence of compelling evidence that would cause Alleghany to call into question the financial condition or near-term business prospects of the issuer of the security; and (iii) Alleghany’s ability and intent to hold the security for a period of time sufficient to allow for any anticipated recovery.

Alleghany’s methodology for assessing credit losses contains inherent risks and uncertainties which could include, but are not limited to, incorrect assumptions about financial condition, liquidity or future prospects, inadequacy of any underlying collateral and unfavorable changes in economic conditions or social trends, interest rates or credit ratings.

Alleghany’s consolidated investment portfolio consists mainly of highly rated and liquid debt and equity securities listed on national securities exchanges. The overall credit quality of the debt securities portfolio is measured using the lowest rating of three large, reputable rating agencies. In this regard, the overall weighted-average credit quality rating of Alleghany’s debt securities portfolio as of June 30, 2020 and December 31, 2019, was AA-. Although a portion of Alleghany’s debt securities, which consist predominantly of municipal bonds, is insured by third-party financial guaranty insurance companies, the impact of such insurance was not significant to the debt securities’ credit quality rating as of June 30, 2020.

The following table presents the ratings of Alleghany’s debt securities as of June 30, 2020:

	Ratings as of June 30, 2020
	AAA / Aaa			AA / Aa			A			BBB / Baa			Below BBB / Baa or Not Rated(1)			Total
	($ in millions)
U.S. government obligations	$	—		$	1,155.7		$	—		$	—		$	—		$	1,155.7
Municipal bonds		226.7			1,603.5			485.2			69.8			1.0			2,386.2
Foreign government obligations		330.0			338.6			97.1			1.1			—			766.8
U.S. corporate bonds		40.7			365.9			1,847.6			1,413.1			335.1			4,002.4
Foreign corporate bonds		237.3			98.5			616.4			301.6			34.3			1,288.1
Mortgage and asset-backed securities:
RMBS		2.5			2,138.2			—			1.0			4.1			2,145.8
CMBS		287.6			412.5			170.9			0.3			—			871.3
Other asset-backed securities		926.1			574.0			466.9			272.8			93.9			2,333.7
Total debt securities	$	2,050.9		$	6,686.9		$	3,684.1		$	2,059.7		$	468.4		$	14,950.0
Percentage of debt securities		13.7	%		44.7	%		24.7	%		13.8	%		3.1	%		100.0	%

(1) Consists of $124.5 million of securities rated BB / Ba, $168.3 million of securities rated B, $20.1 million of securities rated CCC, $1.2 million of securities rated CC, $2.3 million of securities rated below CC and $152.0 million of not rated securities.

(g) Aging of Gross Unrealized Losses

The following tables present gross unrealized losses and related fair values for Alleghany’s AFS securities for which an allowance for credit losses has not been recorded, grouped by duration of time in a continuous unrealized loss position, as of June 30, 2020 and December 31, 2019:

	Less Than 12 Months				12 Months or More				Total
	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
	($ in millions)
As of June 30, 2020
Debt securities:
U.S. government obligations	$	110.7	$	0.3	$	—	$	—	$	110.7	$	0.3
Municipal bonds		95.2		1.8		—		—		95.2		1.8
Foreign government obligations		92.1		0.5		—		—		92.1		0.5
U.S. corporate bonds		373.6		9.2		4.2		0.3		377.8		9.5
Foreign corporate bonds		252.4		6.0		0.9		—		253.3		6.0
Mortgage and asset-backed securities:
RMBS		307.9		0.6		0.4		—		308.3		0.6
CMBS		332.3		25.0		0.2		—		332.5		25.0
Other asset-backed securities		684.7		46.2		520.3		33.1		1,205.0		79.3
Total temporarily impaired securities	$	2,248.9	$	89.6	$	526.0	$	33.4	$	2,774.9	$	123.0

	Less Than 12 Months				12 Months or More				Total
	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
	($ in millions)
As of December 31, 2019
Debt securities:
U.S. government obligations	$	120.3	$	2.0	$	99.7	$	0.8	$	220.0	$	2.8
Municipal bonds		90.2		1.3		4.3		—		94.5		1.3
Foreign government obligations		198.5		1.2		33.8		0.4		232.3		1.6
U.S. corporate bonds		113.8		1.6		27.6		0.7		141.4		2.3
Foreign corporate bonds		212.0		2.3		66.9		0.6		278.9		2.9
Mortgage and asset-backed securities:
RMBS		48.7		0.3		48.6		0.5		97.3		0.8
CMBS		126.8		1.4		1.2		—		128.0		1.4
Other asset-backed securities		422.9		2.7		715.9		17.0		1,138.8		19.7
Total temporarily impaired securities	$	1,333.2	$	12.8	$	998.0	$	20.0	$	2,331.2	$	32.8

As of June 30, 2020, Alleghany held a total of 812 debt securities that were in an unrealized loss position, of which 116 securities were in an unrealized loss position continuously for 12 months or more. The unrealized losses associated with these debt securities consisted of losses related primarily to other asset-backed securities, U.S. corporate bonds and CMBS.  

(h) Investments in Variable Interest Entities

In December 2012, TransRe obtained an ownership interest in Pillar Capital Holdings Limited (“Pillar Holdings”), a Bermuda- based insurance asset manager focused on collateralized reinsurance and catastrophe insurance-linked securities. Additionally, TransRe invested $175.0 million and AIHL invested $25.0 million in limited partnership funds managed by Pillar Holdings (the “Funds”). The objective of the Funds is to create portfolios with attractive risk-reward characteristics and low correlation with other asset classes, using the extensive reinsurance and capital market experience of the principals of Pillar Holdings. Alleghany has concluded that both Pillar Holdings and the Funds (collectively, the “Pillar Investments”) represent variable interest entities and that Alleghany is not the primary beneficiary, as it does not have the ability to direct the activities that most significantly impact each entity’s economic performance. Therefore, the Pillar Investments are not consolidated and are accounted for under the equity method of accounting. Alleghany’s potential maximum loss in the Pillar Investments is limited to its cumulative net investment. As of June 30, 2020 and December 31, 2019, Alleghany’s carrying value in the Pillar Investments, as determined under the equity method of accounting, was $162.9 million and $205.5 million, respectively, which is reported as a component of other invested assets and is net of returns of capital received from the Pillar Investments.

See Note 9(c) of this Form 10-Q for further information regarding variable interest entities.

(i) Investments in Commercial Mortgage Loans

As of June 30, 2020 and December 31, 2019, the carrying value of Alleghany’s commercial mortgage loan portfolio was $685.4 million and $686.2 million, respectively, representing the unpaid principal balance on the loans, less allowance for credit losses. The estimated fair value of the commercial mortgage loan portfolio approximated carrying value as of June 30, 2020 and December 31, 2019. The commercial mortgage loan portfolio consists primarily of first mortgages on commercial properties in major metropolitan areas in the U.S. The loans earn interest at fixed- and floating-rates, and mature in two to ten years from loan origination. As of June 30, 2020, the vast majority of loans in Alleghany’s portfolio were originated in the 2016 through 2019 years.

The principal amounts of the loans were no more than approximately two-thirds of the property’s appraised value at the time the loans were made and the estimated fair value of underlying collateral was approximately double that of the commercial mortgage loan portfolio carrying value as of June 30, 2020.  Fair value estimates of underlying collateral are updated on a rolling basis annually, with a portion of the portfolio updated each quarter. As of June 30, 2020, there was no loan in default or in arrears.

The following table presents a rollforward of Alleghany’s allowance for credit losses on commercial mortgage loans for the three and six months ended June 30, 2020:

	Three Months Ended			Six Months Ended
	June 30, 2020			June 30, 2020
Allowance for Credit Losses	($ in millions)
Beginning balance	$	2.0		$	—
Beginning balance - cumulative effect of an accounting change(1)		—			0.8
Provision for credit losses		(0.7	)		0.5
Charge-offs		—			—
Recoveries		—			—
Balance as of June 30, 2020	$	1.3		$	1.3

(1) See Note 1(c) of this Form 10-Q for further information regarding Alleghany’s adoption of new credit loss accounting guidance.

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Reinsurance Ceded

6 Months Ended

Jun. 30, 2020

Insurance [Abstract]

Reinsurance Ceded

4. Reinsurance Ceded

(a) Overview

Alleghany’s reinsurance and insurance subsidiaries reinsure portions of the risks they underwrite in order to reduce the effect of individual or aggregate exposure to losses, manage capacity, protect capital resources, reduce volatility in specific lines of business, improve risk-adjusted portfolio returns and enable them to increase gross premium writings and risk capacity without requiring additional capital. Alleghany’s reinsurance and insurance subsidiaries generally purchase reinsurance and retrocessional coverages from highly- rated third-party reinsurers or on a collateralized basis. If the assuming reinsurers are unable or unwilling to meet the obligations assumed under the applicable reinsurance agreements, Alleghany’s reinsurance and insurance subsidiaries would remain liable for such reinsurance portion not paid by these reinsurers. As such, funds, trust agreements and letters of credit are held to collateralize a portion of Alleghany’s reinsurance recoverables and Alleghany’s reinsurance and insurance subsidiaries reinsure portions of the risks they underwrite or assume with multiple reinsurance programs. A summary of the more significant programs follows.

TransRe enters into various retrocession arrangements, including property catastrophe retrocession contracts, to manage the effects of individual or aggregate exposure to losses, reduce volatility in specific lines of business, improve risk-adjusted portfolio returns, strengthen its market position and enhance capital efficiency. These include excess-of-loss and quota share treaties in traditional rated form as well as catastrophe bonds and other collateralized insurance-linked structures. TransRe’s retrocession protections generally have a one-year term and renewal dates occur throughout the year, with the majority renewing at January 1 and June 1. The catastrophe bonds, however, have a four-year term, with maturities in 2022 and 2023.

RSUI reinsures its property lines of business through a program consisting of surplus share treaties, facultative placements, and per risk and catastrophe excess of loss treaties. RSUI’s catastrophe reinsurance program and property per risk reinsurance program each run on an annual basis from May 1 to the following April 30 and portions expired on April 30, 2020. Both programs were renewed on May 1, 2020 with substantially similar terms as the expired programs.

(b) Reinsurance Recoverables

Amounts recoverable from reinsurers are recognized in a manner consistent with the loss and loss adjustment expense (“LAE”) liabilities associated with the reinsurance placement and presented on the balance sheet as reinsurance recoverables, and are recorded after an allowance for credit losses. Reinsurance recoverable balances as of June 30, 2020 and December 31, 2019 are presented in the table below:

	As of June 30,			As of December 31,
	2020			2019
	($ in millions)
Reinsurance recoverables on paid losses	$	76.1		$	98.1
Ceded outstanding loss and LAE		1,470.5			1,583.9
Reinsurance recoverables, before allowance for credit losses		1,546.6			1,682.0
Allowance for credit losses		(6.9	)		—
Total	$	1,539.7		$	1,682.0

The following table presents information regarding concentration of Alleghany’s reinsurance recoverables and the ratings profile of our reinsurers as of June 30, 2020:

Reinsurer(1)	Rating(2)	Amount			Percentage
	($ in millions)
Syndicates at Lloyd's of London	A (Excellent)	$	128.2			8.3	%
Kane SAC Ltd, Rondout Segregated Account(3)	not rated		106.0			6.9	%
PartnerRe Ltd	A (Excellent)		94.4			6.1	%
Fairfax Financial Holdings Ltd	A (Superior)		91.7			5.9	%
Swiss Reinsurance Company	A+ (Superior)		90.5			5.9	%
Third Point Reinsurance Group	A- (Excellent)		82.8			5.4	%
RenaissanceRe Holdings Ltd	A+ (Superior)		75.2			4.9	%
W.R. Berkley Corporation	A+ (Superior)		69.2			4.5	%
Kane SAC Ltd, Bowery Segregated Account(3)	not rated		60.4			3.9	%
Chubb	A+ (Superior)		57.2			3.7	%
All other reinsurers			691.0			44.5	%
Total reinsurance recoverables, before allowance for credit losses(4)		$	1,546.6			100.0	%
Allowance for credit losses			(6.9	)
Total		$	1,539.7
Secured reinsurance recoverables(3)		$	570.8			36.9	%

(1) Reinsurance recoverables reflect amounts due from one or more reinsurance subsidiaries of the listed company.

(2) Represents the A.M. Best Company, Inc. financial strength rating for the applicable reinsurance subsidiary or subsidiaries from which the reinsurance recoverable is due.

(3) Represents reinsurance recoverables secured by funds held, trust agreements or letters of credit.

(4) Approximately 70 percent of our reinsurance recoverables balance as of June 30, 2020 was due from reinsurers having an A.M. Best Company, Inc. financial strength rating of A (Excellent) or higher, with a majority of the other reinsurance recoverables being secured by funds held, trust agreements or letters of credit.

The following table presents a rollforward of Alleghany’s allowance for credit losses on reinsurance recoverables for the three and six months ended June 30, 2020:

	Three Months Ended		Six Months Ended
	June 30, 2020		June 30, 2020
Allowance for Credit Losses	($ in millions)
Beginning balance	$	6.8	$	—
Beginning balance - cumulative effect of an accounting change(1)		—		3.3
Provision for credit losses(2)		0.1		3.6
Charge-offs		—		—
Recoveries		—		—
Balance as of June 30, 2020	$	6.9	$	6.9

(1) See Note 1(c) of this Form 10-Q for further information regarding Alleghany’s adoption of new credit loss accounting guidance.

(2) For the six months ended June 30, 2020, primarily reflects the change in estimates of expected credit losses based on current conditions and reasonable and supportable forecasts, including estimates from the Pandemic, as defined in Note 9(a) of this Form 10-Q.

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Liability for Loss and LAE

6 Months Ended

Jun. 30, 2020

Insurance [Abstract]

Liability for Loss and LAE

5. Liability for Loss and LAE

(a) Liability Rollforward

The following table presents the activity in the liability for loss and LAE for the six months ended June 30, 2020 and 2019:

	Six Months Ended
	June 30,
	2020			2019
	($ in millions)
Reserves as of January 1	$	11,928.4		$	12,250.3
Less: reinsurance recoverables(1)		1,583.9			1,857.4
Net reserves as of January 1		10,344.5			10,392.9
Other adjustments		(2.3	)		(1.4	)
Incurred loss and LAE, net of reinsurance, related to:
Current year		2,145.5			1,683.3
Prior years		(93.7	)		(94.0	)
Total incurred loss and LAE, net of reinsurance		2,051.8			1,589.3
Paid loss and LAE, net of reinsurance, related to:(2)
Current year		271.0			248.0
Prior years		1,523.7			1,651.5
Total paid loss and LAE, net of reinsurance		1,794.7			1,899.5
Foreign currency exchange rate effect		(18.5	)		(6.6	)
Net reserves as of June 30		10,580.8			10,074.7
Reinsurance recoverables as of June 30(1)		1,470.5			1,557.1
Reserves as of June 30	$	12,051.3		$	11,631.8

(1) Reinsurance recoverables in this table include only ceded loss and LAE reserves.

(2) Includes paid losses, net of reinsurance, related to commutations.

Gross loss and LAE reserves as of June 30, 2020 increased from December 31, 2019, primarily reflecting the impact of growing net premiums earned and catastrophe losses incurred in the first six months of 2020, partially offset by payments on catastrophe losses incurred primarily in 2017, 2018 and 2019 and favorable prior accident year loss reserve development.  

(b) Liability Development

The following table presents the (favorable) unfavorable prior accident year loss reserve development for the three and six months ended June 30, 2020 and 2019:

	Three Months Ended								Six Months Ended
	June 30,								June 30,
	2020				2019				2020				2019
	($ in millions)
Reinsurance Segment
Property:
Catastrophe events	$	0.5			$	(9.9	)	(1)	$	(31.9	)	(2)	$	(1.5	)	(3)
Non-catastrophe		(13.5	)	(4)		(6.3	)	(5)		(27.8	)	(4)		(25.4	)	(6)
Total		(13.0	)			(16.2	)			(59.7	)			(26.9	)
Casualty & other:
Malpractice Treaties(7)		—				(1.4	)			-				(1.4	)
Catastrophe events		(3.8	)			0.7				(2.4	)			(0.5	)
Other		(34.4	)	(8)		(27.9	)	(9)		(46.8	)	(10)		(52.4	)	(11)
Total		(38.2	)			(28.6	)			(49.2	)			(54.3	)
Total Reinsurance Segment		(51.2	)			(44.8	)			(108.9	)			(81.2	)
Insurance Segment
RSUI:
Casualty		16.5		(12)		(12.1	)	(13)		15.5		(12)		(17.7	)	(13)
Property and other		—				(0.4	)			(0.5	)			1.5		(14)
Total		16.5				(12.5	)			15.0				(16.2	)
CapSpecialty		—				0.7				0.2				3.4		(15)
Total incurred related to prior years	$	(34.7	)		$	(56.6	)		$	(93.7	)		$	(94.0	)

(1) Primarily reflects favorable prior accident year loss reserve development related to wildfires in California in the 2018 accident year.

(2) Primarily reflects favorable prior accident year loss reserve development related to Typhoon Hagibis in the 2019 accident year and, to a lesser extent, catastrophic events in the 2018 accident year.

(3) Primarily reflects favorable prior accident year loss reserve development related to wildfires in California in the 2018 accident year, partially offset by unfavorable prior accident year loss reserve development related to Typhoon Jebi in the 2018 accident year.

(4) Primarily reflects favorable prior accident year loss reserve development in the 2017 and 2019 accident years.

(5) Primarily reflects favorable prior accident year loss reserve development in the 2018 accident year.

(6) Primarily reflects favorable prior accident year loss reserve development in the 2016 and 2018 accident years.

(7) Represents certain malpractice treaties pursuant to which the increased underwriting profits created by the favorable prior accident year loss reserve development are largely retained by the cedants. As a result, the favorable prior accident year loss reserve development is largely offset by an increase in profit commission expense incurred when such favorable prior accident year loss reserve development occurs.

(8) Primarily reflects favorable prior accident year loss reserve development in the longer-tailed lines of business in the 2016 and earlier accident years and in the shorter-tailed lines of business in the 2017 accident year, partially offset by unfavorable prior accident year development in the shorter-tailed lines of business in the 2018 and 2019 accident years.

(9) Primarily reflects favorable prior accident year loss reserve development in the longer-tailed lines of business in the 2013 and prior accident years.

(10) Primarily reflects favorable prior accident year loss reserve development in the longer-tailed lines of business in the 2013 and earlier accident years and in the shorter-tailed lines of business in the 2017 accident year, partially offset by unfavorable prior accident year development in the shorter-tailed lines of business in the 2014 through 2016, 2018 and 2019 accident years.

(11) Primarily reflects favorable prior accident year loss reserve development in the longer-tailed lines of business in the 2013 and prior accident years and in the shorter-tailed lines of business in the 2012 through 2014 accident years.

(12) Primarily reflects unfavorable prior accident year loss reserve development in the professional liability lines of business in the 2017 through 2019 accident years, partially offset by favorable prior accident year loss reserve development in the directors’ and officers’ liability and umbrella/excess lines of business in the 2011 through 2015 accident years.

(13) Primarily reflects favorable prior accident year loss reserve development in the directors’ and officers’ liability and umbrella/excess lines of business in the 2011 through 2015 accident years, partially offset by unfavorable prior accident year loss reserve development in the professional liability lines of business in recent accident years.

(14) Primarily reflects unfavorable prior accident year loss reserve development related to the assumed property reinsurance lines of business from catastrophe losses in recent accident years, partially offset by favorable prior accident year loss reserve development related to Superstorm Sandy in the 2012 accident year and by Hurricane Harvey in the 2017 accident year.

(15) Primarily reflects unfavorable prior accident year loss reserve development in certain specialty lines of business written through a program administrator in connection with a terminated program in the 2009 and 2010 accident years.

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Income Taxes

6 Months Ended

Jun. 30, 2020

Income Tax Disclosure [Abstract]

Income Taxes

6. Income Taxes

The Coronavirus Aid, Relief and Economic Security Act (the “CARES Act”) was signed into law on March 27, 2020.  Among other provisions, the CARES Act delayed certain employer payroll tax remittance deadlines and created or expanded certain income tax credits and loss carryback provisions and, as a result, Alleghany initially recorded a $6.9 million tax benefit that was subsequently reversed as of June 30, 2020 due to a change in Alleghany’s taxable earnings.

The effective tax rate on earnings before income taxes for the first six months of 2020 was 21.7 percent compared with 19.3 percent for the first six months of 2019. The effective tax rate in the first six months of 2020 was calculated based on actual results through June 30, 2020 because management was not able to reliably estimate the annual effective tax rate in light of the significant losses incurred.  The increase in the effective tax rate in the first six months of 2020 from the first six months of 2019 primarily reflects higher foreign and state taxes and lower tax-exempt interest income and dividends-received deductions.

Alleghany believes that, as of June 30, 2020, it had no material uncertain tax positions. Interest and penalties related to unrecognized tax expenses (benefits) are recognized in income tax expense, when applicable. There were no material liabilities for interest or penalties accrued as of June 30, 2020.

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Stockholders' Equity

6 Months Ended

Jun. 30, 2020

Stockholders Equity Note [Abstract]

Stockholders' Equity

7. Stockholders’ Equity

(a) Common Stock Repurchases

In June 2018, the Alleghany Board of Directors authorized the repurchase of shares of common stock of Alleghany, par value $1.00 per share (“Common Stock”), at such times and at prices as management determines to be advisable, up to an aggregate of $400.0 million. In September 2019, the Alleghany Board of Directors authorized, upon the completion of the program authorized in 2018, the repurchase of additional shares of Common Stock, at such times and at prices as management determines to be advisable, up to an aggregate of $500.0 million.  As of June 30, 2020, Alleghany had $582.9 million remaining under its share repurchase authorizations.

The following table presents the shares of Common Stock that Alleghany repurchased in the three and six months ended June 30, 2020 and 2019:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2020		2019		2020		2019
Shares repurchased		—		19,246		62,540		148,813
Cost of shares repurchased (in millions)	$	—	$	12.7	$	44.3	$	93.2
Average price per share repurchased	$	—	$	658.09	$	707.84	$	625.96

(b) Accumulated Other Comprehensive Income (Loss)

The following tables present a reconciliation of the changes during the six months ended June 30, 2020 and 2019 in accumulated other comprehensive income (loss) attributable to Alleghany stockholders:

	Unrealized Appreciation of Investments			Unrealized Currency Translation Adjustment			Retirement Plans			Total
	($ in millions)
Balance as of January 1, 2020	$	321.0		$	(121.8	)	$	(27.9	)	$	171.3
Other comprehensive income (loss), net of tax:
Other comprehensive income (loss) before reclassifications		135.1			1.1			0.9			137.1
Reclassifications from accumulated other comprehensive income		(16.4	)		—			—			(16.4	)
Total		118.7			1.1			0.9			120.7
Balance as of June 30, 2020	$	439.7		$	(120.7	)	$	(27.0	)	$	292.0

	Unrealized Appreciation of Investments			Unrealized Currency Translation Adjustment			Retirement Plans			Total
	($ in millions)
Balance as of January 1, 2019	$	(61.6	)	$	(124.7	)	$	(15.7	)	$	(202.0	)
Other comprehensive income (loss), net of tax:
Other comprehensive income (loss) before reclassifications		356.0			2.3			1.1			359.4
Reclassifications from accumulated other comprehensive income		(5.4	)		—			—			(5.4	)
Total		350.6			2.3			1.1			354.0
Balance as of June 30, 2019	$	289.0		$	(122.4	)	$	(14.6	)	$	152.0

The following table presents reclassifications out of accumulated other comprehensive income (loss) attributable to Alleghany stockholders during the three and six months ended June 30, 2020 and 2019:

		Three Months Ended						Six Months Ended
Accumulated Other		June 30,						June 30,
Comprehensive Income Component	Line in Consolidated Statement of Earnings	2020			2019			2020			2019
		($ in millions)
Unrealized appreciation of investments:	Net realized capital gains(1)	$	9.9		$	(12.4	)	$	(35.2	)	$	(16.8	)
	Change in allowance for credit losses on available for sale securities		(17.0	)		—			14.4			10.0
	Income taxes		1.5			2.6			4.4			1.4
Total reclassifications:	Net (earnings)	$	(5.6	)	$	(9.8	)	$	(16.4	)	$	(5.4	)

(1) For the three months ended June 30, 2020, excludes the $16.3 million Wilbert Remeasurement Gain, and $44.5 million impairment charge from a write-down of SORC oil field assets.  For the six months ended June 30, 2020, excludes the $16.3 million Wilbert Remeasurement Gain, a $7.1 million realized loss as a result of an early redemption of debt, a $74.4 million impairment charge from a write-down of SORC oil field assets and a $5.0 million realized gain from a reduction of certain contingent consideration liabilities.  See Note 3(e) of this Form 10-Q for additional information.

(c) Special Dividend

In February 2020, the Alleghany Board of Directors declared a special dividend of $15.00 per share for stockholders of record on March 5, 2020. On March 15, 2020, Alleghany paid dividends to stockholders totaling $215.0 million.

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Earnings Per Share of Common Stock

6 Months Ended

Jun. 30, 2020

Earnings Per Share [Abstract]

Earnings Per Share of Common Stock

8. Earnings Per Share of Common Stock

The following table presents a reconciliation of the earnings and share data used in the basic and diluted earnings per share computations for the three and six months ended June 30, 2020 and 2019:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2020		2019		2020			2019
	($ in millions, except share amounts)
Net earnings (losses) available to Alleghany stockholders	$	177.4	$	295.5	$	(183.8	)	$	735.7
Effect of dilutive securities		—		—		(8.4	)		—
Income available to common stockholders for diluted earnings per share	$	177.4	$	295.5	$	(192.2	)	$	735.7
Weighted average common shares outstanding applicable to basic earnings per share		14,310,874		14,439,545		14,325,772			14,460,400
Effect of dilutive securities		—		—		35,797			14,960
Adjusted weighted average common shares outstanding applicable to diluted earnings per share		14,310,874		14,439,545		14,361,569			14,475,360
Contingently issuable shares(1)						16,758			46,973

(1) Contingently issuable shares were potentially available in the periods presented, but were not included in the diluted earnings per share computations because the impact was anti-dilutive to the earnings per share calculation.

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Commitments and Contingencies

6 Months Ended

Jun. 30, 2020

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingencies

9. Commitments and Contingencies

(a) General

The ongoing COVID-19 global pandemic (the “Pandemic”) has significantly disrupted many aspects of society as well as financial markets, and has caused widespread global economic dislocation. Alleghany cannot reasonably estimate the duration or severity of the Pandemic, or the extent to which the related disruption may adversely impact its results of operations, financial position and cash flows, or those of its subsidiaries. Adverse impacts from the Pandemic in future periods may include realized and unrealized losses in Alleghany’s investment portfolio and receivables, increased underwriting losses at our reinsurance and insurance segments, and impairment losses on certain subsidiary goodwill and intangible assets.

Certain of Alleghany’s subsidiaries are parties to pending litigation and claims in connection with the ordinary course of their businesses. Each such subsidiary makes provisions for estimated losses to be incurred in such litigation and claims, including legal costs. In the opinion of management, such provisions are adequate, and management does not believe that any pending litigation will have a material adverse effect on Alleghany’s consolidated results of operations, financial position or cash flows.

(b) Leases

Alleghany and its subsidiaries lease certain facilities, land, furniture and equipment under long-term, non-cancelable lease agreements that expire at various dates in future years. Most of Alleghany’s leases relate to office facilities. Alleghany’s lease agreements do not contain any material restrictive covenants and substantially all are considered to be operating leases. Additional information about leases can be found in Note 12(b) to Notes to Consolidated Financial Statements set forth in Part II, Item 8, “Financial Statements and Supplementary Data” of the 2019 Form 10-K.

(c) Hotel Development Commitments

During the first six months of 2020, Alleghany Capital invested $0.8 million in certain hotel development projects.  The projects are conducted through certain limited liability entities, which are variable interest entities, to which Alleghany is not the primary beneficiary.  As of June 30, 2020, Alleghany guaranteed up to $5.6 million of debt of these entities to certain third party lenders, for which Alleghany receives a fee.

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Segments of Business

6 Months Ended

Jun. 30, 2020

Segment Reporting [Abstract]

Segments of Business

10. Segments of Business

(a) Overview

Alleghany’s segments are reported in a manner consistent with the way management evaluates the businesses. As such, Alleghany classifies its businesses into three reportable segments – reinsurance, insurance and Alleghany Capital.

Reinsurance and insurance underwriting activities are evaluated separately from investment and other activities. Segment accounting policies are described in Note 1 to Notes to Consolidated Financial Statements set forth in Part II, Item 8, “Financial Statements and Supplementary Data” of the 2019 Form 10-K.

The reinsurance segment consists of property and casualty reinsurance operations conducted by TransRe’s reinsurance operating subsidiaries and is further reported through two major product lines – property and casualty & other. TransRe provides property and casualty reinsurance to insurers and other reinsurers through brokers and on a direct basis to ceding companies. TransRe writes a modest amount of property and casualty insurance business, which is included in the reinsurance segment. A significant portion of the premiums earned by TransRe’s operations are generated by offices located in Canada, Europe, Asia, Australia, Africa and those serving Latin America and the Caribbean. Although the majority of the premiums earned by these offices typically relate to the regions where they are located, a significant portion may be derived from other regions of the world, including the U.S. In addition, although a significant portion of the assets and liabilities of these foreign offices generally relate to the countries where the ceding companies and reinsurers are located, most investments are located in the country of domicile of these offices.

The insurance segment consists of property and casualty insurance operations conducted in the U.S. by AIHL through its insurance operating subsidiaries RSUI and CapSpecialty. RSUI also writes a modest amount of assumed reinsurance business, which is included in the insurance segment.

The Alleghany Capital segment consists of industrial operations, non-industrial operations and corporate operations at the Alleghany Capital level, which include certain hotel development projects. Industrial operations are conducted through PCT, Kentucky Trailer, W&W|AFCO Steel and, starting April 1, 2020, Wilbert. Non-industrial operations are conducted through IPS, Jazwares and Concord.

On April 1, 2020, Alleghany Capital acquired an additional approximately 55 percent of Wilbert it previously did not own, bringing its equity interest in Wilbert to approximately 100 percent, for $121.3 million, consisting of $46.3 million in cash and $75.0 million of incremental debt. In connection with the acquisition, Alleghany recorded $62.9 million of goodwill, $21.5 million of finite-lived customer relationship intangible assets, $14.9 million of finite-lived license agreements intangible assets and $26.2 million of indefinite-lived trade name intangible assets. The acquisition-date consideration transferred and purchase price allocation to the acquired assets and liabilities of Wilbert were based on estimated fair values that have not been finalized. As a result, the fair value

recorded for these items is a provisional estimate and may be subject to adjustment. Once completed, any adjustment resulting from the valuations may impact the individual amounts recorded for assets acquired and liabilities assumed, as well as the residual goodwill. The acquisition accounting for Wilbert is expected to be finalized later in 2020.  In connection with the acquisition accounting, Alleghany Capital recorded the Wilbert Remeasurement Gain. See Note 3(e) of this Form 10-Q for information on the Wilbert Remeasurement Gain.

Corporate activities are not classified as a segment. The primary components of corporate activities are Alleghany Properties, SORC and activities at the Alleghany parent company. Corporate activities also include the elimination of minor activity between segments.

In addition, corporate activities include interest expense associated with the senior notes issued by Alleghany, whereas interest expense associated with senior notes issued by TransRe is included in “Total Segments” and interest expense associated with other debt is included in Alleghany Capital. Information related to the senior notes and other debt can be found in Note 11 of this Form 10-Q.

(b) Results

The following tables present segment results for Alleghany’s three reportable segments and for corporate activities for the three and six months ended June 30, 2020 and 2019:

		Reinsurance Segment								Insurance Segment
Three Months Ended June 30, 2020		Property			Casualty & other (1)		Total			RSUI			Cap Specialty			Total			Subtotal			Alleghany Capital		Total Segments			Corporate Activities			Consolidated
	($ in millions)
Gross premiums written		$	413.3		$	740.6	$	1,153.9		$	474.7		$	101.2		$	575.9		$	1,729.8		$	—	$	1,729.8		$	(8.6	)	$	1,721.2
Net premiums written			355.8			730.7		1,086.5			300.0			91.5			391.5			1,478.0			—		1,478.0			—			1,478.0
Net premiums earned			328.7			742.3		1,071.0			241.5			82.4			323.9			1,394.9			—		1,394.9			—			1,394.9
Net loss and LAE			273.4			504.8		778.2			196.0			50.2			246.2			1,024.4			—		1,024.4			—			1,024.4
Commissions, brokerage and other    underwriting expenses			96.8			226.3		323.1			52.7			34.2			86.9			410.0			—		410.0			—			410.0
Underwriting (loss) profit(2)		$	(41.5	)	$	11.2	$	(30.3	)	$	(7.2	)	$	(2.0	)	$	(9.2	)		(39.5	)		—		(39.5	)		—			(39.5	)
Net investment income																				115.4			—		115.4			3.3			118.7
Change in the fair value of equity securities																				242.2			—		242.2			—			242.2
Net realized capital gains																				(10.1	)		16.4		6.3			(44.4	)		(38.1	)
Change in allowance for credit losses on available for sale securities																				16.6			—		16.6			0.4			17.0
Noninsurance revenue																				8.3			483.2		491.5			1.2			492.7
Other operating expenses																				33.3			473.6		506.9			3.4			510.3
Corporate administration																				0.5			—		0.5			18.1			18.6
Amortization of intangible assets																				0.2			11.9		12.1			—			12.1
Interest expense																				6.8			4.3		11.1			11.1			22.2
Earnings (losses) before income taxes																			$	292.1		$	9.8	$	301.9		$	(72.1	)	$	229.8

		Reinsurance Segment						Insurance Segment
Three Months Ended June 30, 2019		Property		Casualty & other (1)		Total		RSUI		Cap Specialty		Total		Subtotal		Alleghany Capital		Total Segments		Corporate Activities			Consolidated
	($ in millions)
Gross premiums written		$	381.6	$	829.1	$	1,210.7	$	372.4	$	93.8	$	466.2	$	1,676.9	$	—	$	1,676.9	$	(6.1	)	$	1,670.8
Net premiums written			305.9		807.0		1,112.9		246.9		86.7		333.6		1,446.5		—		1,446.5		—			1,446.5
Net premiums earned			303.2		771.7		1,074.9		202.4		78.7		281.1		1,356.0		—		1,356.0		—			1,356.0
Net loss and LAE			136.2		508.9		645.1		105.6		46.1		151.7		796.8		—		796.8		—			796.8
Commissions, brokerage and other    underwriting expenses			103.8		250.1		353.9		57.9		32.5		90.4		444.3		—		444.3		—			444.3
Underwriting profit(2)		$	63.2	$	12.7	$	75.9	$	38.9	$	0.1	$	39.0		114.9		—		114.9		—			114.9
Net investment income															138.3		0.9		139.2		3.5			142.7
Change in the fair value of equity securities															143.3		—		143.3		0.4			143.7
Net realized capital gains															12.2		0.2		12.4		—			12.4
Change in allowance for credit losses on available for sale securities															—		—		—		—			—
Noninsurance revenue															6.6		593.7		600.3		3.6			603.9
Other operating expenses															26.2		548.3		574.5		7.0			581.5
Corporate administration															1.8		—		1.8		24.2			26.0
Amortization of intangible assets															0.4		8.4		8.8		—			8.8
Interest expense															6.8		4.7		11.5		13.6			25.1
Earnings (losses) before income taxes														$	380.1	$	33.4	$	413.5	$	(37.3	)	$	376.2

		Reinsurance Segment									Insurance Segment
Six Months Ended June 30, 2020		Property			Casualty & other (1)			Total			RSUI		Cap Specialty			Total		Subtotal			Alleghany Capital		Total Segments			Corporate Activities			Consolidated
	($ in millions)
Gross premiums written		$	825.9		$	1,655.5		$	2,481.4		$	840.6	$	186.7		$	1,027.3	$	3,508.7		$	—	$	3,508.7		$	(16.9	)	$	3,491.8
Net premiums written			668.7			1,628.8			2,297.5			544.5		169.7			714.2		3,011.7			—		3,011.7			—			3,011.7
Net premiums earned			650.1			1,554.0			2,204.1			470.9		164.3			635.2		2,839.3			—		2,839.3			—			2,839.3
Net loss and LAE			521.3			1,119.1			1,640.4			311.9		99.5			411.4		2,051.8			—		2,051.8			—			2,051.8
Commissions, brokerage and other    underwriting expenses			202.2			470.7			672.9			110.6		67.9			178.5		851.4			—		851.4			—			851.4
Underwriting (loss) profit(2)		$	(73.4	)	$	(35.8	)	$	(109.2	)	$	48.4	$	(3.1	)	$	45.3		(63.9	)		—		(63.9	)		—			(63.9	)
Net investment income																			225.0			1.8		226.8			3.9			230.7
Change in the fair value of equity securities																			(279.4	)		—		(279.4	)		(1.4	)		(280.8	)
Net realized capital gains																			35.1			21.4		56.5			(81.6	)		(25.1	)
Change in allowance for credit losses on available for sale securities																			(14.1	)		—		(14.1	)		(0.3	)		(14.4	)
Noninsurance revenue																			15.6			940.5		956.1			4.5			960.6
Other operating expenses																			43.1			924.3		967.4			9.6			977.0
Corporate administration																			(1.6	)		—		(1.6	)		5.8			4.2
Amortization of intangible assets																			0.5			21.2		21.7			—			21.7
Interest expense																			13.5			8.1		21.6			19.0			40.6
Earnings (losses) before income taxes																		$	(137.2	)	$	10.1	$	(127.1	)	$	(109.3	)	$	(236.4	)

		Reinsurance Segment						Insurance Segment
Six Months Ended June 30, 2019		Property		Casualty & other (1)		Total		RSUI		Cap Specialty		Total		Subtotal			Alleghany Capital		Total Segments			Corporate Activities			Consolidated
	($ in millions)
Gross premiums written		$	796.7	$	1,645.6	$	2,442.3	$	671.4	$	176.6	$	848.0	$	3,290.3		$	—	$	3,290.3		$	(12.9	)	$	3,277.4
Net premiums written			622.1		1,598.4		2,220.5		448.3		163.3		611.6		2,832.1			—		2,832.1			—			2,832.1
Net premiums earned			612.1		1,492.0		2,104.1		394.8		154.4		549.2		2,653.3			—		2,653.3			—			2,653.3
Net loss and LAE			298.8		999.5		1,298.3		199.9		91.1		291.0		1,589.3			—		1,589.3			—			1,589.3
Commissions, brokerage and other    underwriting expenses			207.5		482.4		689.9		111.4		63.1		174.5		864.4			—		864.4			—			864.4
Underwriting profit(2)		$	105.8	$	10.1	$	115.9	$	83.5	$	0.2	$	83.7		199.6			—		199.6			—			199.6
Net investment income															256.3			2.2		258.5			7.3			265.8
Change in the fair value of equity securities															532.4			—		532.4			3.6			536.0
Net realized capital gains															16.2			0.6		16.8			—			16.8
Change in allowance for credit losses on available for sale securities															(10.0	)		—		(10.0	)		—			(10.0	)
Noninsurance revenue															12.0			1,098.7		1,110.7			7.3			1,118.0
Other operating expenses															55.8			1,013.8		1,069.6			14.3			1,083.9
Corporate administration															2.8			—		2.8			42.5			45.3
Amortization of intangible assets															0.6			15.1		15.7			—			15.7
Interest expense															13.6			9.0		22.6			26.1			48.7
Earnings (losses) before income taxes														$	933.7		$	63.6	$	997.3		$	(64.7	)	$	932.6

(1) Primarily consists of the following reinsurance lines of business: directors’ and officers’ liability; errors and omissions liability; general liability; medical malpractice; ocean marine and aviation; auto liability; accident and health; mortgage reinsurance; surety; and credit.

(2) Underwriting profit represents net premiums earned less net loss and LAE and commissions, brokerage and other underwriting expenses, all as determined in accordance with GAAP, and does not include net investment income, change in the fair value of equity securities, net realized capital gains, change in allowance for credit losses on available for sale securities, noninsurance revenue, other operating expenses, corporate administration, amortization of intangible assets or interest expense. Underwriting profit does not replace earnings before income taxes determined in accordance with GAAP as a measure of profitability. Rather, Alleghany believes that underwriting profit enhances the understanding of its reinsurance and insurance segments’ operating results by highlighting net earnings attributable to their underwriting performance. Earnings before income taxes (a GAAP measure) may show a profit despite an underlying underwriting loss. Where underwriting losses persist over extended periods, a reinsurance or an insurance company’s ability to continue as an ongoing concern may be at risk. Therefore, Alleghany views underwriting profit as an important measure in the overall evaluation of performance.

(c) Identifiable Assets and Equity

The following table presents identifiable assets, the portion of identifiable assets related to cash and invested assets and equity attributable to Alleghany for Alleghany’s reportable segments and for corporate activities as of June 30, 2020:

	Identifiable Assets		Invested Assets and Cash		Equity Attributable to Alleghany
	($ in millions)
Reinsurance segment	$	17,356.0	$	13,990.7	$	5,154.2
Insurance segment		7,072.2		5,324.3		2,572.5
Subtotal		24,428.2		19,315.0		7,726.7
Alleghany Capital		2,273.0		72.5		1,013.2
Total segments		26,701.2		19,387.5		8,739.9
Corporate activities		919.7		874.7		(283.7	)
Consolidated	$	27,620.9	$	20,262.2	$	8,456.2

(d) Alleghany Capital Noninsurance Revenue

For Alleghany Capital’s industrial and non-industrial operations, noninsurance revenue consists of the sale of manufactured goods and services. The following table presents noninsurance revenue for the Alleghany Capital segment for the three and six months ended June 30, 2020 and 2019:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2020		2019		2020		2019
	($ in millions)
Industrial(1)	$	280.6	$	318.3	$	523.1	$	578.4
Non-Industrial(2)		202.6		275.1		417.3		520.0
Corporate & other		—		0.3		0.1		0.3
Alleghany Capital	$	483.2	$	593.7	$	940.5	$	1,098.7

(1) For the three and six months ended June 30, 2020 and 2019, the vast majority of noninsurance revenue was recognized as goods and services transferred to customers over time.

(2) For the three and six months ended June 30, 2020, approximately 74 percent and 78 percent, respectively, of noninsurance revenue was recognized as services transferred to customers over time, with the remainder recognized as goods transferred at a point in time. For the three and six months ended June 30, 2019, 77 percent and 72 percent, respectively, of noninsurance revenue was recognized as services transferred to customers over time, with the remainder recognized as goods transferred at a point in time.

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Debt

6 Months Ended

Jun. 30, 2020

Debt Disclosure [Abstract]

Debt

11. Debt

(a) Senior Notes

On May 18, 2020, Alleghany completed a public offering of $500.0 million aggregate principal amount of its 3.625% senior notes due on May 15, 2030 (the “2030 Senior Notes”).  The 2030 Senior Notes are unsecured and unsubordinated general obligations of Alleghany.  Interest on the 2030 Senior Notes is payable semi-annually in arrears on May 15 and November 15 of each year.  The terms of the 2030 Senior Notes permit redemption prior to maturity.  The indenture under which the 2030 Senior Notes were issued contains covenants that impose conditions on Alleghany’s ability to create liens on the capital stock of AIHL, TransRe or RSUI.  The 2030 Senior Notes were issued at approximately 99.9 percent of par, resulting in proceeds after underwriting discount, commissions and other expenses of $494.8 million, and an effective yield of approximately 3.64 percent.  Approximately $4.6 million of underwriting discount, commissions and other expenses were recorded as deferred charges, which are amortized over the life of the 2030 Senior Notes.

On September 20, 2010, Alleghany completed a public offering of $300.0 million aggregate principal amount of its 5.625% senior notes due on September 15, 2020 (the “2020 Senior Notes”). The terms of the 2020 Senior Notes permitted redemption prior to their maturity. The 2020 Senior Notes were issued at approximately 99.6 percent of par, resulting in proceeds after underwriting discount, commissions and other expenses of $298.9 million and an effective yield of approximately 5.67 percent.

On January 15, 2020, Alleghany redeemed all of its outstanding 2020 Senior Notes for $312.7 million, consisting of the $300.0 million aggregate principal amount redeemed, $7.1 million of redemption premium and $5.6 million of accrued and unpaid interest on the principal amount being redeemed to the date of redemption. As a result of this early redemption of the 2020 Senior Notes, Alleghany recorded a realized loss, before tax, of $7.1 million in the first six months of 2020.

See Note 8 to Notes to Consolidated Financial Statements set forth in Part II, Item 8, “Financial Statements and Supplementary Data” of the 2019 Form 10-K for additional information on other Alleghany senior notes outstanding.

(b) Alleghany Capital Operating Subsidiaries

The debt associated with Alleghany Capital’s operating subsidiaries totaled $438.3 million and $367.1 million as of June 30, 2020 and December 31, 2019, respectively, and is generally used to support working capital needs and to help finance acquisitions. As of June 30, 2020, the $438.3 million included:

• $161.6 million of borrowings by Jazwares under its available credit facilities and borrowings incurred and assumed from its acquisition of Wicked Cool Toys, LLC in October 2019 and its acquisition of Kelly Toys Holdings, LLC in April 2020;

• $74.4 million of borrowings by Wilbert under its available credit facility and term loans;

• $65.2 million of term loans at Kentucky Trailer primarily related to borrowings to finance small acquisitions, including its acquisitions of a controlling interest in two manufacturers of aluminum feed transportation equipment in December 2018 and July 2019, and borrowings under its available credit facilities;

• $58.0 million of borrowings by W&W|AFCO Steel under its available credit facilities and term loans (including borrowings incurred and assumed from its acquisition of Hirschfeld Holdings, LP in February 2018);

• $43.6 million of borrowings by IPS under its available credit facility and term loans, in part to finance a small acquisition in May 2019; and$

• $35.5 million of term loans at PCT primarily related to borrowings to finance the acquisition of a waterjet orifice and nozzle manufacturer in 2016 and the acquisition of a consumable cutting tool manufacturer in June 2019.

None of these liabilities are guaranteed by Alleghany or Alleghany Capital. In December 2019, third-party, floating-rate term loans at Concord were repaid and replaced with approximately $33 million of intercompany floating-rate debt funded by the Alleghany parent company. The intercompany debt and related interest expenses are eliminated at the Alleghany consolidated level.

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Summary of Significant Accounting Principles (Policies)

6 Months Ended

Jun. 30, 2020

Accounting Policies [Abstract]

Principles of Financial Statement Presentation

(a) Principles of Financial Statement Presentation

This Quarterly Report on Form 10-Q (this “Form 10-Q”) should be read in conjunction with the Annual Report on Form 10-K for the year ended December 31, 2019 (the “2019 Form 10-K”) and the Quarterly Report on Form 10-Q for the quarter ended March 31, 2020 of Alleghany Corporation (“Alleghany”).

Alleghany Corporation, a Delaware corporation, owns and supports certain operating subsidiaries and manages investments, anchored by a core position in property and casualty reinsurance and insurance. Through its wholly-owned subsidiary Transatlantic Holdings, Inc. (“TransRe”), an Alleghany subsidiary since March 2012, Alleghany is engaged in the property and casualty reinsurance business. Through its wholly-owned subsidiary Alleghany Insurance Holdings LLC (“AIHL”), Alleghany is engaged in the property and casualty insurance business. AIHL’s insurance operations are principally conducted by its subsidiaries RSUI Group, Inc. (“RSUI”) and CapSpecialty, Inc. (“CapSpecialty”). RSUI and CapSpecialty have been subsidiaries of AIHL since July 2003 and January 2002, respectively. AIHL Re LLC (“AIHL Re”), a captive reinsurance company, which provides reinsurance to Alleghany’s current and former insurance operating subsidiaries and affiliates, has been a subsidiary of Alleghany since its formation in May 2006.

Although Alleghany’s primary sources of revenues and earnings are its reinsurance and insurance operations and investments, Alleghany also generates revenues and expenses from a diverse portfolio of non-financial businesses that are owned and managed through its wholly-owned subsidiary Alleghany Capital Corporation (“Alleghany Capital”). Alleghany Capital’s businesses include:

• Precision Cutting Technologies, Inc. (“PCT”), a holding company headquartered in Rockford, Illinois, with four operating businesses: (i) Bourn & Koch, Inc., a provider of precision automated machine tool solutions; (ii) Diamond Technology Innovations, Inc., a manufacturer of waterjet orifices and nozzles and a provider of related services; (iii) Coastal Industrial Distributors, LLC, a provider of high-performance solid carbide end mills; and (iv) as of March 2020, Supermill LLC, a manufacturer of high-performance carbide end mills;

• R.C. Tway Company, LLC (“Kentucky Trailer”), a manufacturer of custom trailers and truck bodies for the moving and storage industry and other markets, headquartered in Louisville, Kentucky;

• IPS-Integrated Project Services, LLC (“IPS”), a design, engineering, procurement, construction management and validation service provider focused on the global pharmaceutical and biotechnology industries, headquartered in Blue Bell, Pennsylvania;

• Jazwares, LLC (together with its affiliates, “Jazwares”), a global toy and musical instrument company, headquartered in Sunrise, Florida;

• WWSC Holdings, LLC (“W&W|AFCO Steel”), a structural steel fabricator and erector, headquartered in Oklahoma City, Oklahoma;

• CHECO Holdings, LLC (“Concord”), a hotel management and development company, headquartered in Raleigh, North Carolina; and

• Wilbert Funeral Services, Inc. (“Wilbert”), a provider of products and services for the funeral and cemetery industries and precast concrete markets, headquartered in Overland Park, Kansas.

On April 1, 2020, Alleghany Capital acquired an additional approximately 55 percent of Wilbert it previously did not own, bringing its equity interest in Wilbert to approximately 100 percent, and as of that date, the results of Wilbert were included in Alleghany’s consolidated results. Prior to April 1, 2020, Wilbert was accounted for under the equity method of accounting and was included in other invested assets.

In addition, Alleghany owns certain other holding-company investments. Alleghany’s wholly-owned subsidiary Stranded Oil Resources Corporation (“SORC”) is an exploration and production company focused on enhanced oil recovery, headquartered in Golden, Colorado. Alleghany’s wholly-owned subsidiary Alleghany Properties Holdings LLC (“Alleghany Properties”) owns and manages certain properties in the Sacramento, California region. Alleghany’s public equity investments are managed primarily through Alleghany’s wholly-owned subsidiary Roundwood Asset Management LLC.

Unless the context otherwise requires, references to “Alleghany” include Alleghany together with its subsidiaries.

The accompanying consolidated financial statements include the results of Alleghany and its wholly-owned and majority-owned subsidiaries and have been prepared in accordance with accounting principles generally accepted in the U.S. (“GAAP”). All material inter-company balances and transactions have been eliminated in consolidation.

The portion of stockholders’ equity, net earnings and comprehensive income that is not attributable to Alleghany stockholders is presented on the consolidated balance sheets, the consolidated statements of earnings and comprehensive income and the consolidated statements of changes in stockholders’ equity as noncontrolling interests. Because all noncontrolling interests have the option to sell their ownership interests to Alleghany in the future (generally through 2024), the portion of stockholders’ equity that is not attributable to Alleghany stockholders is presented on the consolidated balance sheets and the consolidated statements of changes in stockholders’ equity as redeemable noncontrolling interests for all periods presented. In addition, Alleghany accretes the redeemable noncontrolling interests up to their future estimated redemption value over the period from the date of issuance to the earliest redemption date. The redemption value of the equity interests is generally based on the subsidiary’s earnings in specified periods preceding the applicable redemption date, calculated based on either a specified formula or an independent fair market valuation. During the first six months of 2020, the noncontrolling interests outstanding were approximately as follows: Kentucky Trailer - 23 percent; IPS - 15 percent; Jazwares - 24 percent; W&W|AFCO Steel - 20 percent; and Concord - 15 percent. Prior to April 1, 2019, the noncontrolling interests of PCT were approximately 11 percent.  All noncontrolling interest holders of PCT have exercised their repurchase options and sold their ownership interests to PCT effective April 1, 2019.

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions. These estimates and assumptions affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements, as well as the reported amounts of revenues and expenses during the reporting period. Alleghany relies on historical experience and on various other assumptions that it believes to be reasonable under the circumstances to make judgments about the carrying value of assets and liabilities and reported revenues and expenses that are not readily apparent from other sources. Actual results may differ materially from those reported results to the extent that those estimates and assumptions prove to be inaccurate. Changes in estimates are reflected in the consolidated statements of earnings and comprehensive income in the period in which the changes are made.

(b) Other Significant Accounting Principles

Alleghany’s significant accounting principles can be found in Note 1 to Notes to Consolidated Financial Statements set forth in Part II, Item 8, “Financial Statements and Supplementary Data” of the 2019 Form 10-K.

Recent Accounting Standards

(c) Recent Accounting Standards

Recently Adopted - 2019  

In February 2016, the Financial Accounting Standards Board (the “FASB”) issued guidance on leases. Under this guidance, a lessee is required to recognize lease liabilities and corresponding right-of-use assets for leases with terms of more than one year, whereas under the prior guidance, a lessee was only required to recognize assets and liabilities for those leases qualifying as capital leases. This guidance also requires new disclosures about the amount, timing and uncertainty of cash flows arising from leases. The accounting by lessors remains largely unchanged. This guidance became effective in the first quarter of 2019 for public companies, with early adoption permitted. A modified retrospective transition approach was elected for all leases in existence as of, or entered into after, the beginning of the earliest comparative period presented in the financial statements. Alleghany adopted this guidance in the first quarter of 2019 and the implementation did not have a material impact on its results of operations and financial condition. As part of its implementation, Alleghany elected to not separate lease components from non-lease components (such as office cleanings, security and maintenance services provided by Alleghany’s lessors for certain of its leases). Alleghany also elected the package of practical expedients under the transition guidance, which allowed Alleghany to not reevaluate existing lease classifications, among others. As of January 1, 2019, Alleghany’s adoption of this guidance resulted in recognition of an additional right-of-use asset of approximately $0.2 billion and a corresponding lease liability of $0.2 billion. See Note 12(b) to Notes to Consolidated Financial Statements set forth in Part II, Item 8, “Financial Statements and Supplementary Data” of the 2019 Form 10-K for further information on Alleghany’s leases.

In August 2017, the FASB issued guidance that simplifies the requirements to achieve hedge accounting, better reflects the economic results of hedging in financial statements and improves the alignment between hedge accounting and a company’s risk management activities. This guidance was effective in the first quarter of 2019 for public companies, with early adoption permitted. Alleghany adopted this guidance in the first quarter of 2019 and the implementation did not have a material impact on its results of operations and financial condition.

Recently Adopted – 2020  

In June 2016, the FASB issued guidance on credit losses. Under this guidance, a company is required to measure all expected credit losses on loans, reinsurance recoverables and other financial assets accounted for at cost or amortized cost, as applicable, over the remaining expected life of such assets. Estimates of expected credit losses are to be based on historical experience, current conditions and reasonable and supportable forecasts. Under former FASB guidance, credit losses on these assets generally required a company to recognize credit losses when it was probable that a loss had been incurred. Credit losses for securities accounted for on an available for sale (“AFS”) basis are to be measured in a manner similar to GAAP as applied under former guidance and cannot exceed the amount by which the fair value is less than the amortized cost, although the new guidance removes the length of time a security has been in an unrealized loss position as a possible indication of a credit impairment. Credit losses for all financial assets are to be recorded through an allowance for credit losses. Subsequent reversals in credit loss estimates are permitted and are to be recognized in earnings. This guidance also requires new disclosures about the significant estimates and judgments used in estimating credit losses, as well as the credit quality of financial assets. This guidance was effective in the first quarter of 2020 for public companies, with early adoption permitted. Alleghany adopted this guidance in the first quarter of 2020.

As of January 1, 2020, Alleghany increased its allowances for credit losses on certain financial assets accounted for at cost or amortized cost by $4.5 million and recorded an after-tax cumulative effect reduction in opening retained earnings of $3.6 million.  The increase in allowances for credit losses primarily relates to reinsurance recoverables and commercial mortgage loans. See Note 4 of this Form 10-Q for further information on Alleghany’s reinsurance recoverables and Note 3(i) of this Form 10-Q for further information on Alleghany’s investments in commercial mortgage loans.  The increase in allowances for credit losses also relates to premium balances receivable. Estimates of expected credit losses for all of these assets are based on certain market-based indicators of credit quality, which are updated on an annual basis and re-assessed at least quarterly. Related credit loss expenses are recorded as a component of other operating expenses.  

As of January 1, 2020, credit losses for Alleghany’s AFS securities are recorded through an allowance for credit losses on the consolidated balance sheets and as a change in allowance for credit losses on AFS securities in the consolidated statements of earnings and comprehensive income.  See Note 3(f) of this Form 10-Q for further information on the credit quality for Alleghany’s AFS securities.

In January 2017, the FASB issued guidance that simplifies the subsequent measurement of goodwill. Under this guidance, if an initial qualitative assessment indicates that the fair value of an operating subsidiary may be less than its carrying amount, an impairment charge is recognized for the amount by which the carrying amount of the operating subsidiary exceeds its estimated fair value. Any resulting impairment loss recognized cannot exceed the total amount of goodwill associated with the operating subsidiary. This guidance was effective in the first quarter of 2020 for public companies, with early adoption permitted. Alleghany adopted this guidance in the first quarter of 2020 and the implementation did not have a material impact on its results of operations and financial condition. See Note 2 to Notes to Consolidated Financial Statements set forth in Part II, Item 8, “Financial Statements and Supplementary Data” of the 2019 Form 10-K for further information on Alleghany’s goodwill.

In August 2018, the FASB issued guidance that changes the financial statement disclosure requirements for measuring fair value. With respect to financial instruments classified as “Level 3” in the fair value disclosure hierarchy, the guidance requires certain additional disclosures for public companies related to amounts included in other comprehensive income and significant unobservable inputs used in the valuation, while removing disclosure requirements related to an entity’s overall valuation processes. The guidance also removes certain disclosure requirements related to transfers between financial instruments classified as “Level 1” and “Level 2” and provides clarification on certain other existing disclosure requirements. This guidance was effective for interim and annual periods beginning after December 15, 2019, with early adoption permitted with respect to any eliminated or modified disclosures. Alleghany adopted this guidance in the first quarter of 2020 and the implementation did not impact its results of operations or financial condition. See Note 2 of this Form 10-Q for further information on the fair value of Alleghany’s financial instruments.

In March 2020, the FASB issued guidance to expedite and simplify the accounting associated with the anticipated migration away from the widely-used London Inter-bank Offered Rate and other similar rates as benchmark interest rates after 2021.  Under pre-existing GAAP, such modifications made to: (i) loans and certain other contracts would require re-assessments of the accounting for those contacts, such as whether they were extinguished and remeasured from an accounting perspective; and (ii) derivative contracts may cause a change in accounting, such as a possible dedesignation of hedge accounting. This new guidance largely eliminates these requirements as a result of this migration to one or more new benchmark rates and is generally applicable for contract modifications made prior to December 31, 2022. Alleghany adopted this guidance in March 2020 and the implementation did not have an impact on its results of operations and financial condition.

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Fair Value of Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2020

Fair Value Disclosures [Abstract]

Carrying Value and Estimated Fair Value of Consolidated Financial Instruments

The following table presents the carrying value and estimated fair value of Alleghany’s consolidated financial instruments as of June 30, 2020 and December 31, 2019:

	June 30, 2020				December 31, 2019
	Carrying Value		Fair Value		Carrying Value		Fair Value
	($ in millions)
Assets
Investments (excluding equity method investments and loans)(1)	$	17,509.1	$	17,509.1	$	17,632.3	$	17,632.3
Liabilities
Senior notes and other debt(2)	$	2,017.9	$	2,283.2	$	1,751.1	$	1,962.7

(1) This table includes debt and equity securities, as well as partnership and non-marketable equity investments accounted for at fair value that are included in other invested assets. This table excludes investments accounted for using the equity method and commercial mortgage loans that are accounted for at unpaid principal balance. The fair value of short-term investments approximates amortized cost. The fair value of all other categories of investments is disclosed below.

(2) See Note 11 of this Form 10-Q for additional information on the senior notes and other debt.

Financial Instruments Measured at Fair Value and Level of Fair Value Hierarchy of Inputs

The following tables present Alleghany’s financial instruments measured at fair value and the level of the fair value hierarchy of inputs used as of June 30, 2020 and December 31, 2019:

	Level 1		Level 2		Level 3		Total
	($ in millions)
As of June 30, 2020
Equity securities:
Common stock	$	1,430.5	$	3.5	$	—	$	1,434.0
Preferred stock		—		3.1		2.0		5.1
Total equity securities		1,430.5		6.6		2.0		1,439.1
Debt securities:
U.S. government obligations		—		1,155.7		—		1,155.7
Municipal bonds		—		2,386.2		—		2,386.2
Foreign government obligations		—		766.8		—		766.8
U.S. corporate bonds		—		3,381.9		620.5		4,002.4
Foreign corporate bonds		—		1,116.7		171.4		1,288.1
Mortgage and asset-backed securities:
Residential mortgage-backed securities (“RMBS”)(1)		—		2,143.3		2.5		2,145.8
Commercial mortgage-backed securities (“CMBS”)		—		865.8		5.5		871.3
Other asset-backed securities(2)		—		1,570.7		763.0		2,333.7
Total debt securities		—		13,387.1		1,562.9		14,950.0
Short-term investments		—		1,119.7		—		1,119.7
Other invested assets(3)		—		—		0.3		0.3
Total investments (excluding equity method investments and loans)	$	1,430.5	$	14,513.4	$	1,565.2	$	17,509.1
Senior notes and other debt	$	—	$	1,844.9	$	438.3	$	2,283.2

	Level 1		Level 2		Level 3		Total
	($ in millions)
As of December 31, 2019
Equity securities:
Common stock	$	2,498.1	$	3.3	$	—	$	2,501.4
Preferred stock		—		2.1		2.0		4.1
Total equity securities		2,498.1		5.4		2.0		2,505.5
Debt securities:
U.S. government obligations		—		1,215.0		—		1,215.0
Municipal bonds		—		2,307.9		—		2,307.9
Foreign government obligations		—		690.7		—		690.7
U.S. corporate bonds		—		2,754.0		605.0		3,359.0
Foreign corporate bonds		—		1,208.7		168.7		1,377.4
Mortgage and asset-backed securities:
RMBS(1)		—		1,838.5		1.9		1,840.4
CMBS		—		865.9		5.8		871.7
Other asset-backed securities(2)		—		1,692.9		856.7		2,549.6
Total debt securities		—		12,573.6		1,638.1		14,211.7
Short-term investments		—		914.8		—		914.8
Other invested assets(3)		—		—		0.3		0.3
Total investments (excluding equity method investments and loans)	$	2,498.1	$	13,493.8	$	1,640.4	$	17,632.3
Senior notes and other debt	$	—	$	1,595.6	$	367.1	$	1,962.7

(1) Primarily includes government agency pass-through securities guaranteed by a government agency or government sponsored enterprise, among other types of RMBS.

(2) Includes $748.5 million and $834.2 million of collateralized loan obligations as of June 30, 2020 and December 31, 2019, respectively.

(3) Includes partnership and non-marketable equity investments accounted for at fair value, and excludes investments accounted for using the equity method.

Reconciliations of Changes in Level Three Assets Measured at Fair Value

The following tables present reconciliations of the changes in Level 3 assets during the six months ended June 30, 2020 and 2019 measured at fair value:

			Debt Securities
									Mortgage and asset-backed
Six Months Ended June 30, 2020	Preferred Stock		U.S. Corporate Bonds			Foreign Corporate Bonds			RMBS			CMBS			Other Asset- backed Securities			Other Invested Assets(1)		Total
	($ in millions)
Balance as of January 1, 2020	$	2.0	$	605.0		$	168.7		$	1.9		$	5.8		$	856.7		$	0.3	$	1,640.4
Net realized/unrealized gains (losses) included in:
Net earnings (losses)(2)		—		(3.8	)		0.1			—			—			(9.5	)		—		(13.2	)
Other comprehensive income (loss)		—		14.6			3.2			(0.2	)		(0.3	)		(24.4	)		—		(7.1	)
Purchases		—		14.0			12.7			1.0			—			46.6			—		74.3
Sales		—		—			(0.8	)		—			—			(54.7	)		—		(55.5	)
Issuances		—		—			—			—			—			—			—		—
Settlements		—		(9.3	)		(9.2	)		(0.2	)		—			(37.2	)		—		(55.9	)
Transfers into Level 3		—		—			—			—			—			—			—		—
Transfers out of Level 3		—		—			(3.3	)		—			—			(14.5	)		—		(17.8	)
Balance as of June 30, 2020	$	2.0	$	620.5		$	171.4		$	2.5		$	5.5		$	763.0		$	0.3	$	1,565.2

				Debt Securities
										Mortgage and asset-backed
Six Months Ended June 30, 2019	Preferred Stock			U.S. Corporate Bonds			Foreign Corporate Bonds			CMBS			Other Asset- backed Securities			Other Invested Assets(1)			Total
	($ in millions)
Balance as of January 1, 2019	$	5.4		$	425.7		$	126.9		$	—		$	1,266.9		$	0.7		$	1,825.6
Net realized/unrealized gains (losses) included in:
Net (losses)(2)		(1.6	)		(10.0	)		(0.1	)		—			(0.7	)		(0.2	)		(12.6	)
Other comprehensive income (loss)		—			31.3			5.4			—			20.5			(0.1	)		57.1
Purchases		0.3			90.9			13.9			0.2			56.8			0.1			162.2
Sales		—			—			(5.6	)		—			(300.2	)		—			(305.8	)
Issuances		—			—			—			—			—			—			—
Settlements		—			(3.6	)		(7.7	)		—			(71.5	)		—			(82.8	)
Transfers into Level 3		—			1.3			14.7			—			—			—			16.0
Transfers out of Level 3		—			(1.0	)		(1.6	)		(0.2	)		(12.1	)		—			(14.9	)
Balance as of June 30, 2019	$	4.1		$	534.6		$	145.9		$	-		$	959.7		$	0.5		$	1,644.8

(1) Includes partnership and non-marketable equity investments accounted for at fair value.

(2) There were no credit losses recorded in net earnings related to Level 3 assets still held as of June 30, 2020 and 2019.

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Investments (Tables)

6 Months Ended

Jun. 30, 2020

Investments [Abstract]

Amortized Cost and Fair Value of Available For Sale Securities

The following tables present the amortized cost and the fair value of AFS securities as of June 30, 2020 and December 31, 2019:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Allowance for Credit Losses(2)			Fair Value
	($ in millions)
As of June 30, 2020
Debt securities:
U.S. government obligations	$	1,102.2	$	53.8	$	(0.3	)	$	—		$	1,155.7
Municipal bonds		2,246.8		141.2		(1.8	)		—			2,386.2
Foreign government obligations		733.7		33.6		(0.5	)		—			766.8
U.S. corporate bonds		3,758.5		261.0		(9.5	)		(7.6	)		4,002.4
Foreign corporate bonds		1,252.5		42.5		(6.0	)		(0.9	)		1,288.1
Mortgage and asset-backed securities:
RMBS		2,063.7		82.7		(0.6	)		—			2,145.8
CMBS		862.5		33.8		(25.0	)		—			871.3
Other asset-backed securities(1)		2,375.6		37.8		(79.3	)		(0.4	)		2,333.7
Total debt securities		14,395.5		686.4		(123.0	)		(8.9	)		14,950.0
Short-term investments		1,119.7		—		—			—			1,119.7
Total investments	$	15,515.2	$	686.4	$	(123.0	)	$	(8.9	)	$	16,069.7

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	($ in millions)
As of December 31, 2019
Debt securities:
U.S. government obligations	$	1,198.5	$	19.3	$	(2.8	)	$	1,215.0
Municipal bonds		2,190.5		118.7		(1.3	)		2,307.9
Foreign government obligations		675.9		16.4		(1.6	)		690.7
U.S. corporate bonds		3,206.2		155.1		(2.3	)		3,359.0
Foreign corporate bonds		1,348.1		32.2		(2.9	)		1,377.4
Mortgage and asset-backed securities:
RMBS		1,785.1		56.1		(0.8	)		1,840.4
CMBS		849.9		23.2		(1.4	)		871.7
Other asset-backed securities(1)		2,544.5		24.8		(19.7	)		2,549.6
Total debt securities		13,798.7		445.8		(32.8	)		14,211.7
Short-term investments		914.8		—		—			914.8
Total investments	$	14,713.5	$	445.8	$	(32.8	)	$	15,126.5

(1) Includes $748.5 million and $834.2 million of collateralized loan obligations as of June 30, 2020 and December 31, 2019, respectively.

(2) See Note 1(c) of this Form 10-Q for further information regarding Alleghany’s adoption of new credit loss accounting guidance.

Amortized Cost and Estimated Fair Value of Debt Securities by Contractual Maturity

The following table presents the amortized cost and estimated fair value of debt securities by contractual maturity as of June 30, 2020. 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.

	Amortized Cost		Fair Value
	($ in millions)
As of June 30, 2020
Short-term investments due in one year or less	$	1,119.7	$	1,119.7
Mortgage and asset-backed securities(1)		5,301.8		5,350.8
Debt securities with maturity dates:
One year or less		423.1		427.2
Over one through five years		3,431.6		3,568.9
Over five through ten years		3,172.4		3,363.3
Over ten years		2,066.6		2,239.8
Total debt securities	$	14,395.5	$	14,950.0

(1) Mortgage and asset-backed securities by their nature do not generally have single maturity dates.

Net Investment Income

The following table presents net investment income for the three and six months ended June 30, 2020 and 2019:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2020			2019			2020			2019
	($ in millions)
Interest income	$	109.2		$	127.2		$	228.5		$	246.5
Dividend income		5.2			9.4			15.2			19.2
Investment expenses		(7.2	)		(7.2	)		(14.4	)		(14.7	)
Partnerships and other investment results		11.5			13.3			1.4			14.8
Total	$	118.7		$	142.7		$	230.7		$	265.8

Summary of Changes in Fair Value of Equity Securities

The following table presents changes in the fair value of equity securities for the three and six months ended June 30, 2020 and 2019:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2020		2019		2020			2019
	($ in millions)
Change in the fair value of equity securities sold during the period	$	50.7	$	11.8	$	(114.2	)	$	73.9
Change in the fair value of equity securities held at the end of the    period		191.5		131.9		(166.6	)		462.1
Change in the fair value of equity securities	$	242.2	$	143.7	$	(280.8	)	$	536.0

Amounts of Gross Realized Capital Gains and Gross Realized Capital Losses of Available For Sale Securities

The following table presents amounts of gross realized capital gains and gross realized capital losses for the three and six months ended June 30, 2020 and 2019:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2020			2019			2020			2019
	($ in millions)
Gross realized capital gains	$	28.5		$	13.6		$	87.4		$	25.7
Gross realized capital (losses)		(66.6	)		(1.2	)		(112.5	)		(8.9	)
Net realized capital gains	$	(38.1	)	$	12.4		$	(25.1	)	$	16.8

Allowance for Credit Losses on Available for Sale Securities

The following table presents a rollforward of Alleghany’s allowance for credit losses on AFS securities for the three and six months ended June 30, 2020:

	Three Months Ended			Six Months Ended
	June 30, 2020			June 30, 2020
Allowance for Credit Losses	($ in millions)
Beginning balance	$	31.4		$	—
Beginning balance - cumulative effect of an accounting change(1)		—			—
Provision for credit losses		(17.0	)		14.4
Charge-offs		(5.5	)		(5.5	)
Recoveries		—			—
Balance as of June 30, 2020	$	8.9		$	8.9

(1) See Note 1(c) of this Form 10-Q for further information regarding Alleghany’s adoption of new credit loss accounting guidance.

Summary of Rating of Debt securities

The following table presents the ratings of Alleghany’s debt securities as of June 30, 2020:

	Ratings as of June 30, 2020
	AAA / Aaa			AA / Aa			A			BBB / Baa			Below BBB / Baa or Not Rated(1)			Total
	($ in millions)
U.S. government obligations	$	—		$	1,155.7		$	—		$	—		$	—		$	1,155.7
Municipal bonds		226.7			1,603.5			485.2			69.8			1.0			2,386.2
Foreign government obligations		330.0			338.6			97.1			1.1			—			766.8
U.S. corporate bonds		40.7			365.9			1,847.6			1,413.1			335.1			4,002.4
Foreign corporate bonds		237.3			98.5			616.4			301.6			34.3			1,288.1
Mortgage and asset-backed securities:
RMBS		2.5			2,138.2			—			1.0			4.1			2,145.8
CMBS		287.6			412.5			170.9			0.3			—			871.3
Other asset-backed securities		926.1			574.0			466.9			272.8			93.9			2,333.7
Total debt securities	$	2,050.9		$	6,686.9		$	3,684.1		$	2,059.7		$	468.4		$	14,950.0
Percentage of debt securities		13.7	%		44.7	%		24.7	%		13.8	%		3.1	%		100.0	%

(1) Consists of $124.5 million of securities rated BB / Ba, $168.3 million of securities rated B, $20.1 million of securities rated CCC, $1.2 million of securities rated CC, $2.3 million of securities rated below CC and $152.0 million of not rated securities.

Gross Unrealized Losses and Related Fair Values for AFS Securities for which an Allowance for Credit Losses has Not Been Recorded Grouped by Duration of Time in Continuous Unrealized Loss Position

The following tables present gross unrealized losses and related fair values for Alleghany’s AFS securities for which an allowance for credit losses has not been recorded, grouped by duration of time in a continuous unrealized loss position, as of June 30, 2020 and December 31, 2019:

	Less Than 12 Months				12 Months or More				Total
	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
	($ in millions)
As of June 30, 2020
Debt securities:
U.S. government obligations	$	110.7	$	0.3	$	—	$	—	$	110.7	$	0.3
Municipal bonds		95.2		1.8		—		—		95.2		1.8
Foreign government obligations		92.1		0.5		—		—		92.1		0.5
U.S. corporate bonds		373.6		9.2		4.2		0.3		377.8		9.5
Foreign corporate bonds		252.4		6.0		0.9		—		253.3		6.0
Mortgage and asset-backed securities:
RMBS		307.9		0.6		0.4		—		308.3		0.6
CMBS		332.3		25.0		0.2		—		332.5		25.0
Other asset-backed securities		684.7		46.2		520.3		33.1		1,205.0		79.3
Total temporarily impaired securities	$	2,248.9	$	89.6	$	526.0	$	33.4	$	2,774.9	$	123.0

	Less Than 12 Months				12 Months or More				Total
	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
	($ in millions)
As of December 31, 2019
Debt securities:
U.S. government obligations	$	120.3	$	2.0	$	99.7	$	0.8	$	220.0	$	2.8
Municipal bonds		90.2		1.3		4.3		—		94.5		1.3
Foreign government obligations		198.5		1.2		33.8		0.4		232.3		1.6
U.S. corporate bonds		113.8		1.6		27.6		0.7		141.4		2.3
Foreign corporate bonds		212.0		2.3		66.9		0.6		278.9		2.9
Mortgage and asset-backed securities:
RMBS		48.7		0.3		48.6		0.5		97.3		0.8
CMBS		126.8		1.4		1.2		—		128.0		1.4
Other asset-backed securities		422.9		2.7		715.9		17.0		1,138.8		19.7
Total temporarily impaired securities	$	1,333.2	$	12.8	$	998.0	$	20.0	$	2,331.2	$	32.8

Allowance for Credit Losses on Commercial Mortgage Loans

The following table presents a rollforward of Alleghany’s allowance for credit losses on commercial mortgage loans for the three and six months ended June 30, 2020:

	Three Months Ended			Six Months Ended
	June 30, 2020			June 30, 2020
Allowance for Credit Losses	($ in millions)
Beginning balance	$	2.0		$	—
Beginning balance - cumulative effect of an accounting change(1)		—			0.8
Provision for credit losses		(0.7	)		0.5
Charge-offs		—			—
Recoveries		—			—
Balance as of June 30, 2020	$	1.3		$	1.3

(1) See Note 1(c) of this Form 10-Q for further information regarding Alleghany’s adoption of new credit loss accounting guidance.

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Reinsurance Ceded (Tables)

6 Months Ended

Jun. 30, 2020

Insurance [Abstract]

Reinsurance Recoverables, Recorded After Allowance for Credit Losses

Amounts recoverable from reinsurers are recognized in a manner consistent with the loss and loss adjustment expense (“LAE”) liabilities associated with the reinsurance placement and presented on the balance sheet as reinsurance recoverables, and are recorded after an allowance for credit losses. Reinsurance recoverable balances as of June 30, 2020 and December 31, 2019 are presented in the table below:

	As of June 30,			As of December 31,
	2020			2019
	($ in millions)
Reinsurance recoverables on paid losses	$	76.1		$	98.1
Ceded outstanding loss and LAE		1,470.5			1,583.9
Reinsurance recoverables, before allowance for credit losses		1,546.6			1,682.0
Allowance for credit losses		(6.9	)		—
Total	$	1,539.7		$	1,682.0

Information Regarding Concentration of Reinsurance Recoverables and Ratings Profile of Our Reinsurers

The following table presents information regarding concentration of Alleghany’s reinsurance recoverables and the ratings profile of our reinsurers as of June 30, 2020:

Reinsurer(1)	Rating(2)	Amount			Percentage
	($ in millions)
Syndicates at Lloyd's of London	A (Excellent)	$	128.2			8.3	%
Kane SAC Ltd, Rondout Segregated Account(3)	not rated		106.0			6.9	%
PartnerRe Ltd	A (Excellent)		94.4			6.1	%
Fairfax Financial Holdings Ltd	A (Superior)		91.7			5.9	%
Swiss Reinsurance Company	A+ (Superior)		90.5			5.9	%
Third Point Reinsurance Group	A- (Excellent)		82.8			5.4	%
RenaissanceRe Holdings Ltd	A+ (Superior)		75.2			4.9	%
W.R. Berkley Corporation	A+ (Superior)		69.2			4.5	%
Kane SAC Ltd, Bowery Segregated Account(3)	not rated		60.4			3.9	%
Chubb	A+ (Superior)		57.2			3.7	%
All other reinsurers			691.0			44.5	%
Total reinsurance recoverables, before allowance for credit losses(4)		$	1,546.6			100.0	%
Allowance for credit losses			(6.9	)
Total		$	1,539.7
Secured reinsurance recoverables(3)		$	570.8			36.9	%

(1) Reinsurance recoverables reflect amounts due from one or more reinsurance subsidiaries of the listed company.

(2) Represents the A.M. Best Company, Inc. financial strength rating for the applicable reinsurance subsidiary or subsidiaries from which the reinsurance recoverable is due.

(3) Represents reinsurance recoverables secured by funds held, trust agreements or letters of credit.

(4) Approximately 70 percent of our reinsurance recoverables balance as of June 30, 2020 was due from reinsurers having an A.M. Best Company, Inc. financial strength rating of A (Excellent) or higher, with a majority of the other reinsurance recoverables being secured by funds held, trust agreements or letters of credit.

Allowance for Credit Losses on Reinsurance Recoverables

The following table presents a rollforward of Alleghany’s allowance for credit losses on reinsurance recoverables for the three and six months ended June 30, 2020:

	Three Months Ended		Six Months Ended
	June 30, 2020		June 30, 2020
Allowance for Credit Losses	($ in millions)
Beginning balance	$	6.8	$	—
Beginning balance - cumulative effect of an accounting change(1)		—		3.3
Provision for credit losses(2)		0.1		3.6
Charge-offs		—		—
Recoveries		—		—
Balance as of June 30, 2020	$	6.9	$	6.9

(1) See Note 1(c) of this Form 10-Q for further information regarding Alleghany’s adoption of new credit loss accounting guidance.

(2) For the six months ended June 30, 2020, primarily reflects the change in estimates of expected credit losses based on current conditions and reasonable and supportable forecasts, including estimates from the Pandemic, as defined in Note 9(a) of this Form 10-Q.

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Liability for Loss and LAE (Tables)

6 Months Ended

Jun. 30, 2020

Insurance [Abstract]

Activity in Liability for Loss and Loss Adjustment Expense

The following table presents the activity in the liability for loss and LAE for the six months ended June 30, 2020 and 2019:

	Six Months Ended
	June 30,
	2020			2019
	($ in millions)
Reserves as of January 1	$	11,928.4		$	12,250.3
Less: reinsurance recoverables(1)		1,583.9			1,857.4
Net reserves as of January 1		10,344.5			10,392.9
Other adjustments		(2.3	)		(1.4	)
Incurred loss and LAE, net of reinsurance, related to:
Current year		2,145.5			1,683.3
Prior years		(93.7	)		(94.0	)
Total incurred loss and LAE, net of reinsurance		2,051.8			1,589.3
Paid loss and LAE, net of reinsurance, related to:(2)
Current year		271.0			248.0
Prior years		1,523.7			1,651.5
Total paid loss and LAE, net of reinsurance		1,794.7			1,899.5
Foreign currency exchange rate effect		(18.5	)		(6.6	)
Net reserves as of June 30		10,580.8			10,074.7
Reinsurance recoverables as of June 30(1)		1,470.5			1,557.1
Reserves as of June 30	$	12,051.3		$	11,631.8

(1) Reinsurance recoverables in this table include only ceded loss and LAE reserves.

(2) Includes paid losses, net of reinsurance, related to commutations.

(Favorable) Unfavorable Prior Accident Year Loss Reserve Development

The following table presents the (favorable) unfavorable prior accident year loss reserve development for the three and six months ended June 30, 2020 and 2019:

	Three Months Ended								Six Months Ended
	June 30,								June 30,
	2020				2019				2020				2019
	($ in millions)
Reinsurance Segment
Property:
Catastrophe events	$	0.5			$	(9.9	)	(1)	$	(31.9	)	(2)	$	(1.5	)	(3)
Non-catastrophe		(13.5	)	(4)		(6.3	)	(5)		(27.8	)	(4)		(25.4	)	(6)
Total		(13.0	)			(16.2	)			(59.7	)			(26.9	)
Casualty & other:
Malpractice Treaties(7)		—				(1.4	)			-				(1.4	)
Catastrophe events		(3.8	)			0.7				(2.4	)			(0.5	)
Other		(34.4	)	(8)		(27.9	)	(9)		(46.8	)	(10)		(52.4	)	(11)
Total		(38.2	)			(28.6	)			(49.2	)			(54.3	)
Total Reinsurance Segment		(51.2	)			(44.8	)			(108.9	)			(81.2	)
Insurance Segment
RSUI:
Casualty		16.5		(12)		(12.1	)	(13)		15.5		(12)		(17.7	)	(13)
Property and other		—				(0.4	)			(0.5	)			1.5		(14)
Total		16.5				(12.5	)			15.0				(16.2	)
CapSpecialty		—				0.7				0.2				3.4		(15)
Total incurred related to prior years	$	(34.7	)		$	(56.6	)		$	(93.7	)		$	(94.0	)

(1) Primarily reflects favorable prior accident year loss reserve development related to wildfires in California in the 2018 accident year.

(2) Primarily reflects favorable prior accident year loss reserve development related to Typhoon Hagibis in the 2019 accident year and, to a lesser extent, catastrophic events in the 2018 accident year.

(3) Primarily reflects favorable prior accident year loss reserve development related to wildfires in California in the 2018 accident year, partially offset by unfavorable prior accident year loss reserve development related to Typhoon Jebi in the 2018 accident year.

(4) Primarily reflects favorable prior accident year loss reserve development in the 2017 and 2019 accident years.

(5) Primarily reflects favorable prior accident year loss reserve development in the 2018 accident year.

(6) Primarily reflects favorable prior accident year loss reserve development in the 2016 and 2018 accident years.

(7) Represents certain malpractice treaties pursuant to which the increased underwriting profits created by the favorable prior accident year loss reserve development are largely retained by the cedants. As a result, the favorable prior accident year loss reserve development is largely offset by an increase in profit commission expense incurred when such favorable prior accident year loss reserve development occurs.

(8) Primarily reflects favorable prior accident year loss reserve development in the longer-tailed lines of business in the 2016 and earlier accident years and in the shorter-tailed lines of business in the 2017 accident year, partially offset by unfavorable prior accident year development in the shorter-tailed lines of business in the 2018 and 2019 accident years.

(9) Primarily reflects favorable prior accident year loss reserve development in the longer-tailed lines of business in the 2013 and prior accident years.

(10) Primarily reflects favorable prior accident year loss reserve development in the longer-tailed lines of business in the 2013 and earlier accident years and in the shorter-tailed lines of business in the 2017 accident year, partially offset by unfavorable prior accident year development in the shorter-tailed lines of business in the 2014 through 2016, 2018 and 2019 accident years.

(11) Primarily reflects favorable prior accident year loss reserve development in the longer-tailed lines of business in the 2013 and prior accident years and in the shorter-tailed lines of business in the 2012 through 2014 accident years.

(12) Primarily reflects unfavorable prior accident year loss reserve development in the professional liability lines of business in the 2017 through 2019 accident years, partially offset by favorable prior accident year loss reserve development in the directors’ and officers’ liability and umbrella/excess lines of business in the 2011 through 2015 accident years.

(13) Primarily reflects favorable prior accident year loss reserve development in the directors’ and officers’ liability and umbrella/excess lines of business in the 2011 through 2015 accident years, partially offset by unfavorable prior accident year loss reserve development in the professional liability lines of business in recent accident years.

(14) Primarily reflects unfavorable prior accident year loss reserve development related to the assumed property reinsurance lines of business from catastrophe losses in recent accident years, partially offset by favorable prior accident year loss reserve development related to Superstorm Sandy in the 2012 accident year and by Hurricane Harvey in the 2017 accident year.

(15) Primarily reflects unfavorable prior accident year loss reserve development in certain specialty lines of business written through a program administrator in connection with a terminated program in the 2009 and 2010 accident years.

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Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2020

Stockholders Equity Note [Abstract]

Schedule of Common Stock Repurchases

The following table presents the shares of Common Stock that Alleghany repurchased in the three and six months ended June 30, 2020 and 2019:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2020		2019		2020		2019
Shares repurchased		—		19,246		62,540		148,813
Cost of shares repurchased (in millions)	$	—	$	12.7	$	44.3	$	93.2
Average price per share repurchased	$	—	$	658.09	$	707.84	$	625.96

Reconciliation of Accumulated Other Comprehensive Income (Loss)

The following tables present a reconciliation of the changes during the six months ended June 30, 2020 and 2019 in accumulated other comprehensive income (loss) attributable to Alleghany stockholders:

	Unrealized Appreciation of Investments			Unrealized Currency Translation Adjustment			Retirement Plans			Total
	($ in millions)
Balance as of January 1, 2020	$	321.0		$	(121.8	)	$	(27.9	)	$	171.3
Other comprehensive income (loss), net of tax:
Other comprehensive income (loss) before reclassifications		135.1			1.1			0.9			137.1
Reclassifications from accumulated other comprehensive income		(16.4	)		—			—			(16.4	)
Total		118.7			1.1			0.9			120.7
Balance as of June 30, 2020	$	439.7		$	(120.7	)	$	(27.0	)	$	292.0

	Unrealized Appreciation of Investments			Unrealized Currency Translation Adjustment			Retirement Plans			Total
	($ in millions)
Balance as of January 1, 2019	$	(61.6	)	$	(124.7	)	$	(15.7	)	$	(202.0	)
Other comprehensive income (loss), net of tax:
Other comprehensive income (loss) before reclassifications		356.0			2.3			1.1			359.4
Reclassifications from accumulated other comprehensive income		(5.4	)		—			—			(5.4	)
Total		350.6			2.3			1.1			354.0
Balance as of June 30, 2019	$	289.0		$	(122.4	)	$	(14.6	)	$	152.0

Reclassifications of Accumulated Other Comprehensive Income (Loss)

The following table presents reclassifications out of accumulated other comprehensive income (loss) attributable to Alleghany stockholders during the three and six months ended June 30, 2020 and 2019:

		Three Months Ended						Six Months Ended
Accumulated Other		June 30,						June 30,
Comprehensive Income Component	Line in Consolidated Statement of Earnings	2020			2019			2020			2019
		($ in millions)
Unrealized appreciation of investments:	Net realized capital gains(1)	$	9.9		$	(12.4	)	$	(35.2	)	$	(16.8	)
	Change in allowance for credit losses on available for sale securities		(17.0	)		—			14.4			10.0
	Income taxes		1.5			2.6			4.4			1.4
Total reclassifications:	Net (earnings)	$	(5.6	)	$	(9.8	)	$	(16.4	)	$	(5.4	)

(1) For the three months ended June 30, 2020, excludes the $16.3 million Wilbert Remeasurement Gain, and $44.5 million impairment charge from a write-down of SORC oil field assets.  For the six months ended June 30, 2020, excludes the $16.3 million Wilbert Remeasurement Gain, a $7.1 million realized loss as a result of an early redemption of debt, a $74.4 million impairment charge from a write-down of SORC oil field assets and a $5.0 million realized gain from a reduction of certain contingent consideration liabilities.  See Note 3(e) of this Form 10-Q for additional information.

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Earnings Per Share of Common Stock (Tables)

6 Months Ended

Jun. 30, 2020

Earnings Per Share [Abstract]

Reconciliation of Earnings and Share Data used in Basic and Diluted (Losses) Earnings per Share Computations

The following table presents a reconciliation of the earnings and share data used in the basic and diluted earnings per share computations for the three and six months ended June 30, 2020 and 2019:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2020		2019		2020			2019
	($ in millions, except share amounts)
Net earnings (losses) available to Alleghany stockholders	$	177.4	$	295.5	$	(183.8	)	$	735.7
Effect of dilutive securities		—		—		(8.4	)		—
Income available to common stockholders for diluted earnings per share	$	177.4	$	295.5	$	(192.2	)	$	735.7
Weighted average common shares outstanding applicable to basic earnings per share		14,310,874		14,439,545		14,325,772			14,460,400
Effect of dilutive securities		—		—		35,797			14,960
Adjusted weighted average common shares outstanding applicable to diluted earnings per share		14,310,874		14,439,545		14,361,569			14,475,360
Contingently issuable shares(1)						16,758			46,973

(1) Contingently issuable shares were potentially available in the periods presented, but were not included in the diluted earnings per share computations because the impact was anti-dilutive to the earnings per share calculation.

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Segments of Business (Tables)

6 Months Ended

Jun. 30, 2020

Segment Reporting [Abstract]

Results for Reportable Segments and Corporate Activities

The following tables present segment results for Alleghany’s three reportable segments and for corporate activities for the three and six months ended June 30, 2020 and 2019:

		Reinsurance Segment								Insurance Segment
Three Months Ended June 30, 2020		Property			Casualty & other (1)		Total			RSUI			Cap Specialty			Total			Subtotal			Alleghany Capital		Total Segments			Corporate Activities			Consolidated
	($ in millions)
Gross premiums written		$	413.3		$	740.6	$	1,153.9		$	474.7		$	101.2		$	575.9		$	1,729.8		$	—	$	1,729.8		$	(8.6	)	$	1,721.2
Net premiums written			355.8			730.7		1,086.5			300.0			91.5			391.5			1,478.0			—		1,478.0			—			1,478.0
Net premiums earned			328.7			742.3		1,071.0			241.5			82.4			323.9			1,394.9			—		1,394.9			—			1,394.9
Net loss and LAE			273.4			504.8		778.2			196.0			50.2			246.2			1,024.4			—		1,024.4			—			1,024.4
Commissions, brokerage and other    underwriting expenses			96.8			226.3		323.1			52.7			34.2			86.9			410.0			—		410.0			—			410.0
Underwriting (loss) profit(2)		$	(41.5	)	$	11.2	$	(30.3	)	$	(7.2	)	$	(2.0	)	$	(9.2	)		(39.5	)		—		(39.5	)		—			(39.5	)
Net investment income																				115.4			—		115.4			3.3			118.7
Change in the fair value of equity securities																				242.2			—		242.2			—			242.2
Net realized capital gains																				(10.1	)		16.4		6.3			(44.4	)		(38.1	)
Change in allowance for credit losses on available for sale securities																				16.6			—		16.6			0.4			17.0
Noninsurance revenue																				8.3			483.2		491.5			1.2			492.7
Other operating expenses																				33.3			473.6		506.9			3.4			510.3
Corporate administration																				0.5			—		0.5			18.1			18.6
Amortization of intangible assets																				0.2			11.9		12.1			—			12.1
Interest expense																				6.8			4.3		11.1			11.1			22.2
Earnings (losses) before income taxes																			$	292.1		$	9.8	$	301.9		$	(72.1	)	$	229.8

		Reinsurance Segment						Insurance Segment
Three Months Ended June 30, 2019		Property		Casualty & other (1)		Total		RSUI		Cap Specialty		Total		Subtotal		Alleghany Capital		Total Segments		Corporate Activities			Consolidated
	($ in millions)
Gross premiums written		$	381.6	$	829.1	$	1,210.7	$	372.4	$	93.8	$	466.2	$	1,676.9	$	—	$	1,676.9	$	(6.1	)	$	1,670.8
Net premiums written			305.9		807.0		1,112.9		246.9		86.7		333.6		1,446.5		—		1,446.5		—			1,446.5
Net premiums earned			303.2		771.7		1,074.9		202.4		78.7		281.1		1,356.0		—		1,356.0		—			1,356.0
Net loss and LAE			136.2		508.9		645.1		105.6		46.1		151.7		796.8		—		796.8		—			796.8
Commissions, brokerage and other    underwriting expenses			103.8		250.1		353.9		57.9		32.5		90.4		444.3		—		444.3		—			444.3
Underwriting profit(2)		$	63.2	$	12.7	$	75.9	$	38.9	$	0.1	$	39.0		114.9		—		114.9		—			114.9
Net investment income															138.3		0.9		139.2		3.5			142.7
Change in the fair value of equity securities															143.3		—		143.3		0.4			143.7
Net realized capital gains															12.2		0.2		12.4		—			12.4
Change in allowance for credit losses on available for sale securities															—		—		—		—			—
Noninsurance revenue															6.6		593.7		600.3		3.6			603.9
Other operating expenses															26.2		548.3		574.5		7.0			581.5
Corporate administration															1.8		—		1.8		24.2			26.0
Amortization of intangible assets															0.4		8.4		8.8		—			8.8
Interest expense															6.8		4.7		11.5		13.6			25.1
Earnings (losses) before income taxes														$	380.1	$	33.4	$	413.5	$	(37.3	)	$	376.2

		Reinsurance Segment									Insurance Segment
Six Months Ended June 30, 2020		Property			Casualty & other (1)			Total			RSUI		Cap Specialty			Total		Subtotal			Alleghany Capital		Total Segments			Corporate Activities			Consolidated
	($ in millions)
Gross premiums written		$	825.9		$	1,655.5		$	2,481.4		$	840.6	$	186.7		$	1,027.3	$	3,508.7		$	—	$	3,508.7		$	(16.9	)	$	3,491.8
Net premiums written			668.7			1,628.8			2,297.5			544.5		169.7			714.2		3,011.7			—		3,011.7			—			3,011.7
Net premiums earned			650.1			1,554.0			2,204.1			470.9		164.3			635.2		2,839.3			—		2,839.3			—			2,839.3
Net loss and LAE			521.3			1,119.1			1,640.4			311.9		99.5			411.4		2,051.8			—		2,051.8			—			2,051.8
Commissions, brokerage and other    underwriting expenses			202.2			470.7			672.9			110.6		67.9			178.5		851.4			—		851.4			—			851.4
Underwriting (loss) profit(2)		$	(73.4	)	$	(35.8	)	$	(109.2	)	$	48.4	$	(3.1	)	$	45.3		(63.9	)		—		(63.9	)		—			(63.9	)
Net investment income																			225.0			1.8		226.8			3.9			230.7
Change in the fair value of equity securities																			(279.4	)		—		(279.4	)		(1.4	)		(280.8	)
Net realized capital gains																			35.1			21.4		56.5			(81.6	)		(25.1	)
Change in allowance for credit losses on available for sale securities																			(14.1	)		—		(14.1	)		(0.3	)		(14.4	)
Noninsurance revenue																			15.6			940.5		956.1			4.5			960.6
Other operating expenses																			43.1			924.3		967.4			9.6			977.0
Corporate administration																			(1.6	)		—		(1.6	)		5.8			4.2
Amortization of intangible assets																			0.5			21.2		21.7			—			21.7
Interest expense																			13.5			8.1		21.6			19.0			40.6
Earnings (losses) before income taxes																		$	(137.2	)	$	10.1	$	(127.1	)	$	(109.3	)	$	(236.4	)

		Reinsurance Segment						Insurance Segment
Six Months Ended June 30, 2019		Property		Casualty & other (1)		Total		RSUI		Cap Specialty		Total		Subtotal			Alleghany Capital		Total Segments			Corporate Activities			Consolidated
	($ in millions)
Gross premiums written		$	796.7	$	1,645.6	$	2,442.3	$	671.4	$	176.6	$	848.0	$	3,290.3		$	—	$	3,290.3		$	(12.9	)	$	3,277.4
Net premiums written			622.1		1,598.4		2,220.5		448.3		163.3		611.6		2,832.1			—		2,832.1			—			2,832.1
Net premiums earned			612.1		1,492.0		2,104.1		394.8		154.4		549.2		2,653.3			—		2,653.3			—			2,653.3
Net loss and LAE			298.8		999.5		1,298.3		199.9		91.1		291.0		1,589.3			—		1,589.3			—			1,589.3
Commissions, brokerage and other    underwriting expenses			207.5		482.4		689.9		111.4		63.1		174.5		864.4			—		864.4			—			864.4
Underwriting profit(2)		$	105.8	$	10.1	$	115.9	$	83.5	$	0.2	$	83.7		199.6			—		199.6			—			199.6
Net investment income															256.3			2.2		258.5			7.3			265.8
Change in the fair value of equity securities															532.4			—		532.4			3.6			536.0
Net realized capital gains															16.2			0.6		16.8			—			16.8
Change in allowance for credit losses on available for sale securities															(10.0	)		—		(10.0	)		—			(10.0	)
Noninsurance revenue															12.0			1,098.7		1,110.7			7.3			1,118.0
Other operating expenses															55.8			1,013.8		1,069.6			14.3			1,083.9
Corporate administration															2.8			—		2.8			42.5			45.3
Amortization of intangible assets															0.6			15.1		15.7			—			15.7
Interest expense															13.6			9.0		22.6			26.1			48.7
Earnings (losses) before income taxes														$	933.7		$	63.6	$	997.3		$	(64.7	)	$	932.6

(1) Primarily consists of the following reinsurance lines of business: directors’ and officers’ liability; errors and omissions liability; general liability; medical malpractice; ocean marine and aviation; auto liability; accident and health; mortgage reinsurance; surety; and credit.

(2) Underwriting profit represents net premiums earned less net loss and LAE and commissions, brokerage and other underwriting expenses, all as determined in accordance with GAAP, and does not include net investment income, change in the fair value of equity securities, net realized capital gains, change in allowance for credit losses on available for sale securities, noninsurance revenue, other operating expenses, corporate administration, amortization of intangible assets or interest expense. Underwriting profit does not replace earnings before income taxes determined in accordance with GAAP as a measure of profitability. Rather, Alleghany believes that underwriting profit enhances the understanding of its reinsurance and insurance segments’ operating results by highlighting net earnings attributable to their underwriting performance. Earnings before income taxes (a GAAP measure) may show a profit despite an underlying underwriting loss. Where underwriting losses persist over extended periods, a reinsurance or an insurance company’s ability to continue as an ongoing concern may be at risk. Therefore, Alleghany views underwriting profit as an important measure in the overall evaluation of performance.

Summary of Identifiable Assets and Equity

The following table presents identifiable assets, the portion of identifiable assets related to cash and invested assets and equity attributable to Alleghany for Alleghany’s reportable segments and for corporate activities as of June 30, 2020:

	Identifiable Assets		Invested Assets and Cash		Equity Attributable to Alleghany
	($ in millions)
Reinsurance segment	$	17,356.0	$	13,990.7	$	5,154.2
Insurance segment		7,072.2		5,324.3		2,572.5
Subtotal		24,428.2		19,315.0		7,726.7
Alleghany Capital		2,273.0		72.5		1,013.2
Total segments		26,701.2		19,387.5		8,739.9
Corporate activities		919.7		874.7		(283.7	)
Consolidated	$	27,620.9	$	20,262.2	$	8,456.2

Summary of Alleghany Capital Noninsurance Revenue

For Alleghany Capital’s industrial and non-industrial operations, noninsurance revenue consists of the sale of manufactured goods and services. The following table presents noninsurance revenue for the Alleghany Capital segment for the three and six months ended June 30, 2020 and 2019:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2020		2019		2020		2019
	($ in millions)
Industrial(1)	$	280.6	$	318.3	$	523.1	$	578.4
Non-Industrial(2)		202.6		275.1		417.3		520.0
Corporate & other		—		0.3		0.1		0.3
Alleghany Capital	$	483.2	$	593.7	$	940.5	$	1,098.7

(1) For the three and six months ended June 30, 2020 and 2019, the vast majority of noninsurance revenue was recognized as goods and services transferred to customers over time.

(2) For the three and six months ended June 30, 2020, approximately 74 percent and 78 percent, respectively, of noninsurance revenue was recognized as services transferred to customers over time, with the remainder recognized as goods transferred at a point in time. For the three and six months ended June 30, 2019, 77 percent and 72 percent, respectively, of noninsurance revenue was recognized as services transferred to customers over time, with the remainder recognized as goods transferred at a point in time.

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Summary of Significant Accounting Principles - Additional Information (Detail) - USD ($) $ in Millions	Jan. 01, 2020	Jun. 30, 2020	Apr. 01, 2020	Mar. 31, 2019	Jan. 01, 2019
Accounting Standards Update 2016-02
Significant Accounting Policies [Line Items]
Right-of-use asset					$ 200.0
Lease liability					$ 200.0
Accounting Standards Update 2016-13
Significant Accounting Policies [Line Items]
Allowances for credit losses on certain financial assets	$ 4.5
After-tax cumulative effect reduction in opening retained earnings	$ (3.6)
Wilbert Funeral Services, Inc
Significant Accounting Policies [Line Items]
Equity interest percentage			100.00%
Equity interest percentage acquired			55.00%
Kentucky Trailer
Significant Accounting Policies [Line Items]
Ownership of interest held by noncontrolling partners		23.00%
Integrated Project Services LLC
Significant Accounting Policies [Line Items]
Ownership of interest held by noncontrolling partners		15.00%
Precision Cutting Technologies, Inc
Significant Accounting Policies [Line Items]
Ownership of interest held by noncontrolling partners				11.00%
Jazwares, LLC
Significant Accounting Policies [Line Items]
Ownership of interest held by noncontrolling partners		24.00%
WWSC Holdings, LLC
Significant Accounting Policies [Line Items]
Ownership of interest held by noncontrolling partners		20.00%
Concord
Significant Accounting Policies [Line Items]
Ownership of interest held by noncontrolling partners		15.00%

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Carrying Values and Estimated Fair Values of Consolidated Financial Instruments (Detail) - USD ($) $ in Millions		Jun. 30, 2020	Dec. 31, 2019
Assets
Investments (excluding equity method investments and loans)	[1]	$ 17,509.1	$ 17,632.3
Liabilities
Senior notes and other debt	[2]	2,283.2	1,962.7
Carrying Value
Assets
Investments (excluding equity method investments and loans)	[1]	17,509.1	17,632.3
Liabilities
Senior notes and other debt	[2]	$ 2,017.9	$ 1,751.1

[1] This table includes debt and equity securities, as well as partnership and non-marketable equity investments accounted for at fair value that are included in other invested assets. This table excludes investments accounted for using the equity method and commercial mortgage loans that are accounted for at unpaid principal balance. The fair value of short-term investments approximates amortized cost. The fair value of all other categories of investments is disclosed below.

[2] See Note 11 of this Form 10-Q for additional information on the senior notes and other debt.

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Financial Instruments Measured at Fair Value and Level of Fair Value Hierarchy of Inputs (Detail) - USD ($) $ in Thousands		Jun. 30, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of equities		$ 1,439,062	$ 2,505,496
Estimated fair value of available for sale debt securities		14,950,006	14,211,745
Estimated fair value of investments (excluding equity method investments and loans)	[1]	17,509,100	17,632,300
Senior notes and other debt	[2]	2,283,200	1,962,700
Common Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of equities		1,434,000	2,501,400
Preferred Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of equities		5,100	4,100
U.S. government obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of available for sale debt securities		1,155,700	1,215,000
Municipal bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of available for sale debt securities		2,386,200	2,307,900
Foreign government obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of available for sale debt securities		766,800	690,700
U.S. corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of available for sale debt securities		4,002,400	3,359,000
Foreign corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of available for sale debt securities		1,288,100	1,377,400
RMBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of available for sale debt securities	[3]	2,145,800	1,840,400
CMBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of available for sale debt securities		871,300	871,700
Other asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of available for sale debt securities	[4]	2,333,700	2,549,600
Short-term Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of investments (excluding equity method investments and loans)		1,119,700	914,800
Other invested assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of investments (excluding equity method investments and loans)	[5]	300	300
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of equities		1,430,500	2,498,100
Estimated fair value of investments (excluding equity method investments and loans)		1,430,500	2,498,100
Level 1 | Common Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of equities		1,430,500	2,498,100
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of equities		6,600	5,400
Estimated fair value of available for sale debt securities		13,387,100	12,573,600
Estimated fair value of investments (excluding equity method investments and loans)		14,513,400	13,493,800
Senior notes and other debt		1,844,900	1,595,600
Level 2 | Common Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of equities		3,500	3,300
Level 2 | Preferred Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of equities		3,100	2,100
Level 2 | U.S. government obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of available for sale debt securities		1,155,700	1,215,000
Level 2 | Municipal bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of available for sale debt securities		2,386,200	2,307,900
Level 2 | Foreign government obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of available for sale debt securities		766,800	690,700
Level 2 | U.S. corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of available for sale debt securities		3,381,900	2,754,000
Level 2 | Foreign corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of available for sale debt securities		1,116,700	1,208,700
Level 2 | RMBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of available for sale debt securities	[3]	2,143,300	1,838,500
Level 2 | CMBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of available for sale debt securities		865,800	865,900
Level 2 | Other asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of available for sale debt securities	[4]	1,570,700	1,692,900
Level 2 | Short-term Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of investments (excluding equity method investments and loans)		1,119,700	914,800
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of equities		2,000	2,000
Estimated fair value of available for sale debt securities		1,562,900	1,638,100
Estimated fair value of investments (excluding equity method investments and loans)		1,565,200	1,640,400
Senior notes and other debt		438,300	367,100
Level 3 | Preferred Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of equities		2,000	2,000
Level 3 | U.S. corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of available for sale debt securities		620,500	605,000
Level 3 | Foreign corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of available for sale debt securities		171,400	168,700
Level 3 | RMBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of available for sale debt securities	[3]	2,500	1,900
Level 3 | CMBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of available for sale debt securities		5,500	5,800
Level 3 | Other asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of available for sale debt securities	[4]	763,000	856,700
Level 3 | Other invested assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of investments (excluding equity method investments and loans)	[5]	$ 300	$ 300

[1] This table includes debt and equity securities, as well as partnership and non-marketable equity investments accounted for at fair value that are included in other invested assets. This table excludes investments accounted for using the equity method and commercial mortgage loans that are accounted for at unpaid principal balance. The fair value of short-term investments approximates amortized cost. The fair value of all other categories of investments is disclosed below.

[2] See Note 11 of this Form 10-Q for additional information on the senior notes and other debt.

[3] Primarily includes government agency pass-through securities guaranteed by a government agency or government sponsored enterprise, among other types of RMBS.

[4] Includes $748.5 million and $834.2 million of collateralized loan obligations as of June 30, 2020 and December 31, 2019, respectively.

[5] Includes partnership and non-marketable equity investments accounted for at fair value, and excludes investments accounted for using the equity method.

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Financial Instruments Measured at Fair Value and Level of Fair Value Hierarchy of Inputs (Parenthetical) (Detail) - USD ($) $ in Thousands		Jun. 30, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of available for sale debt securities		$ 14,950,006	$ 14,211,745
Other asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of available for sale debt securities	[1]	2,333,700	2,549,600
Collateralized loan obligations | Other asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of available for sale debt securities		$ 748,500	$ 834,200

[1] Includes $748.5 million and $834.2 million of collateralized loan obligations as of June 30, 2020 and December 31, 2019, respectively.

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Fair Value of Financial Instruments - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Gross transfers out of Level 3	$ 3.1	$ 13.9	$ 17.8	$ 14.9
Gross transfers into Level 3		$ 1.3		16.0
Foreign corporate bonds
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Gross transfers out of Level 3			3.3	1.6
Gross transfers into Level 3				14.7
U.S. corporate bonds
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Gross transfers out of Level 3				1.0
Gross transfers into Level 3				1.3
Other asset-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Gross transfers out of Level 3			$ 14.5	$ 12.1

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Reconciliations of Changes in Level Three Assets Measured at Fair Value (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance				$ 1,640.4	$ 1,825.6
Net realized/unrealized gains (losses) included in:
Net earnings (losses)	[1]			(13.2)	(12.6)
Other comprehensive income (loss)				(7.1)	57.1
Purchases				74.3	162.2
Sales				(55.5)	(305.8)
Settlements				(55.9)	(82.8)
Transfers into Level 3			$ 1.3		16.0
Transfers out of Level 3		$ (3.1)	(13.9)	(17.8)	(14.9)
Ending balance		1,565.2	1,644.8	1,565.2	1,644.8
Preferred Stock
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance				2.0	5.4
Net realized/unrealized gains (losses) included in:
Net earnings (losses)	[1]				(1.6)
Purchases					0.3
Ending balance		2.0	4.1	2.0	4.1
U.S. corporate bonds
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance				605.0	425.7
Net realized/unrealized gains (losses) included in:
Net earnings (losses)	[1]			(3.8)	(10.0)
Other comprehensive income (loss)				14.6	31.3
Purchases				14.0	90.9
Settlements				(9.3)	(3.6)
Transfers into Level 3					1.3
Transfers out of Level 3					(1.0)
Ending balance		620.5	534.6	620.5	534.6
Foreign corporate bonds
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance				168.7	126.9
Net realized/unrealized gains (losses) included in:
Net earnings (losses)	[1]			0.1	(0.1)
Other comprehensive income (loss)				3.2	5.4
Purchases				12.7	13.9
Sales				(0.8)	(5.6)
Settlements				(9.2)	(7.7)
Transfers into Level 3					14.7
Transfers out of Level 3				(3.3)	(1.6)
Ending balance		171.4	145.9	171.4	145.9
RMBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance				1.9
Net realized/unrealized gains (losses) included in:
Other comprehensive income (loss)				(0.2)
Purchases				1.0
Settlements				(0.2)
Ending balance		2.5		2.5
CMBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance				5.8
Net realized/unrealized gains (losses) included in:
Other comprehensive income (loss)				(0.3)
Purchases					0.2
Transfers out of Level 3					(0.2)
Ending balance		5.5		5.5
Other invested assets
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	[2]			0.3	0.7
Net realized/unrealized gains (losses) included in:
Net earnings (losses)	[1],[2]				(0.2)
Other comprehensive income (loss)	[2]				(0.1)
Purchases	[2]				0.1
Ending balance	[2]	0.3	0.5	0.3	0.5
Other Asset Backed Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance				856.7	1,266.9
Net realized/unrealized gains (losses) included in:
Net earnings (losses)	[1]			(9.5)	(0.7)
Other comprehensive income (loss)				(24.4)	20.5
Purchases				46.6	56.8
Sales				(54.7)	(300.2)
Settlements				(37.2)	(71.5)
Transfers out of Level 3				(14.5)	(12.1)
Ending balance		$ 763.0	$ 959.7	$ 763.0	$ 959.7

[1] There were no credit losses recorded in net earnings related to Level 3 assets still held as of June 30, 2020 and 2019.

[2] Includes partnership and non-marketable equity investments accounted for at fair value.

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Amortized Cost and Fair Value of Available For Sale Securities (Detail) - USD ($) $ in Thousands		Jun. 30, 2020		Mar. 31, 2020	Dec. 31, 2019
Schedule of Available-for-sale Securities [Line Items]
Debt securities, amortized cost		$ 14,395,510			$ 13,798,576
Debt securities, gross unrealized gains		686,400			445,800
Debt securities, gross unrealized losses		(123,000)			(32,800)
Debt securities, allowance for credit losses		(8,904)	[1]	$ (31,400)
Debt securities, fair value		14,950,006			14,211,745
Amortized Cost or Cost		15,515,200			14,713,500
Gross Unrealized Gains		686,400			445,800
Gross Unrealized Losses		(123,000)			(32,800)
Allowance for Credit Losses	[1]	(8,900)
Fair Value		16,069,700			15,126,500
U.S. government obligations
Schedule of Available-for-sale Securities [Line Items]
Debt securities, amortized cost		1,102,200			1,198,500
Debt securities, gross unrealized gains		53,800			19,300
Debt securities, gross unrealized losses		(300)			(2,800)
Debt securities, fair value		1,155,700			1,215,000
Municipal bonds
Schedule of Available-for-sale Securities [Line Items]
Debt securities, amortized cost		2,246,800			2,190,500
Debt securities, gross unrealized gains		141,200			118,700
Debt securities, gross unrealized losses		(1,800)			(1,300)
Debt securities, fair value		2,386,200			2,307,900
Foreign government obligations
Schedule of Available-for-sale Securities [Line Items]
Debt securities, amortized cost		733,700			675,900
Debt securities, gross unrealized gains		33,600			16,400
Debt securities, gross unrealized losses		(500)			(1,600)
Debt securities, fair value		766,800			690,700
U.S. corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Debt securities, amortized cost		3,758,500			3,206,200
Debt securities, gross unrealized gains		261,000			155,100
Debt securities, gross unrealized losses		(9,500)			(2,300)
Debt securities, allowance for credit losses	[1]	(7,600)
Debt securities, fair value		4,002,400			3,359,000
Foreign corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Debt securities, amortized cost		1,252,500			1,348,100
Debt securities, gross unrealized gains		42,500			32,200
Debt securities, gross unrealized losses		(6,000)			(2,900)
Debt securities, allowance for credit losses	[1]	(900)
Debt securities, fair value		1,288,100			1,377,400
RMBS
Schedule of Available-for-sale Securities [Line Items]
Debt securities, amortized cost		2,063,700			1,785,100
Debt securities, gross unrealized gains		82,700			56,100
Debt securities, gross unrealized losses		(600)			(800)
Debt securities, fair value	[2]	2,145,800			1,840,400
CMBS
Schedule of Available-for-sale Securities [Line Items]
Debt securities, amortized cost		862,500			849,900
Debt securities, gross unrealized gains		33,800			23,200
Debt securities, gross unrealized losses		(25,000)			(1,400)
Debt securities, fair value		871,300			871,700
Other Asset Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Debt securities, amortized cost		2,375,600			2,544,500
Debt securities, gross unrealized gains		37,800			24,800
Debt securities, gross unrealized losses		(79,300)			(19,700)
Debt securities, allowance for credit losses	[1]	(400)
Debt securities, fair value	[3]	2,333,700			2,549,600
Short-term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost or Cost		1,119,700			914,800
Fair Value		$ 1,119,700			$ 914,800

[1] See Note 1(c) of this Form 10-Q for further information regarding Alleghany’s adoption of new credit loss accounting guidance.

[2] Primarily includes government agency pass-through securities guaranteed by a government agency or government sponsored enterprise, among other types of RMBS.

[3] Includes $748.5 million and $834.2 million of collateralized loan obligations as of June 30, 2020 and December 31, 2019, respectively.

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Amortized Cost and Fair Value of Available For Sale Securities (Parenthetical) (Detail) - USD ($) $ in Thousands		Jun. 30, 2020	Dec. 31, 2019
Schedule of Available-for-sale Securities [Line Items]
Estimated fair value of available for sale debt securities		$ 14,950,006	$ 14,211,745
Other asset-backed securities
Schedule of Available-for-sale Securities [Line Items]
Estimated fair value of available for sale debt securities	[1]	2,333,700	2,549,600
Other asset-backed securities | Collateralized loan obligations
Schedule of Available-for-sale Securities [Line Items]
Estimated fair value of available for sale debt securities		$ 748,500	$ 834,200

[1] Includes $748.5 million and $834.2 million of collateralized loan obligations as of June 30, 2020 and December 31, 2019, respectively.

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Amortized Cost and Estimated Fair Value of Debt Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands		Jun. 30, 2020	Dec. 31, 2019
Investments Debt And Equity Securities [Abstract]
Short-term investments due in one year or less, amortized cost		$ 1,119,700
Mortgage and asset-backed securities, amortized cost	[1]	5,301,800
Debt securities with maturity dates, amortized cost:
One year or less		423,100
Over one through five years		3,431,600
Over five through ten years		3,172,400
Over ten years		2,066,600
Debt securities, amortized cost		14,395,510	$ 13,798,576
Short-term investments due in one year or less, fair value		1,119,678	914,776
Mortgage and asset-backed securities, fair value	[1]	5,350,800
Debt securities with maturity dates, fair value:
One year or less		427,200
Over one through five years		3,568,900
Over five through ten years		3,363,300
Over ten years		2,239,800
Total debt securities, fair value		$ 14,950,006	$ 14,211,745

[1] Mortgage and asset-backed securities by their nature do not generally have single maturity dates.

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Net Investment Income (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Investment Income Net [Abstract]
Interest income	$ 109,200	$ 127,200	$ 228,500	$ 246,500
Dividend income	5,200	9,400	15,200	19,200
Investment expenses	(7,200)	(7,200)	(14,400)	(14,700)
Partnerships and other investment results	11,500	13,300	1,400	14,800
Net investment income	$ 118,691	$ 142,745	$ 230,673	$ 265,794

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Summary of Changes in Fair Value of Equity Securities (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Equity Securities Fv Ni Gain Loss [Abstract]
Change in the fair value of equity securities sold during the period	$ 50,700	$ 11,800	$ (114,200)	$ 73,900
Change in the fair value of equity securities held at the end of the period	191,500	131,900	(166,600)	462,100
Change in the fair value of equity securities	$ 242,186	$ 143,660	$ (280,790)	$ 536,013

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Investments - Additional Information (Detail) $ in Thousands		1 Months Ended	3 Months Ended		6 Months Ended
	Apr. 01, 2020 USD ($)	Dec. 31, 2012 USD ($)	Jun. 30, 2020 USD ($) Investment	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) Investment	Jun. 30, 2019 USD ($)	Mar. 31, 2020	Dec. 31, 2019 USD ($)
Investments [Line Items]
Proceeds from sale of debt and equity securities			$ 1,200,000	$ 1,300,000	$ 3,800,000	$ 3,800,000
Realized loss on early redemption of debt					(7,100)
Realized gain on reduction of contingent consideration liabilities					$ 5,000
Securities impairment test description					Alleghany continually monitors the difference between amortized cost and the estimated fair value of its debt investments. The analysis of a security’s decline in value is performed in its functional currency.  Debt securities in an unrealized loss position are evaluated for credit losses if they meet any of the following criteria: (i) they are trading at a discount of at least 20 percent to amortized cost and have a credit rating below investment grade or are not rated; (ii) there has been a negative credit or news event with respect to the issuer that could indicate the existence of a credit loss; or (iii) Alleghany intends to sell, or it is more likely than not that Alleghany will sell, the debt security before recovery of its amortized cost basis. If Alleghany intends to sell, or it is more likely than not that Alleghany will sell, a debt security before recovery of its amortized cost basis, the total amount of the unrealized loss position is recognized as a credit loss in earnings. To the extent that a debt security that is in an unrealized loss position is not impaired based on the preceding, Alleghany will consider a debt security to be impaired when it believes it to be probable that Alleghany will not be able to collect the entire amortized cost basis. For debt securities in an unrealized loss position as of the end of each quarter, Alleghany develops a best estimate of the present value of expected cash flows. If the results of the cash flow analysis indicate that Alleghany will not recover the full amount of its amortized cost basis in the debt security, Alleghany records a credit loss in earnings equal to the difference between the present value of expected cash flows and the amortized cost basis of the debt security. If applicable, the difference between the total unrealized loss position on the debt security and the total loss recognized in earnings is the non-credit related portion, which is recorded as a component of other comprehensive income.In developing the cash flow analyses for debt securities, Alleghany considers various factors for the different categories of debt securities. For municipal bonds, Alleghany takes into account the taxing power of the issuer, source of revenue, credit risk and enhancements and pre-refunding. For mortgage and asset-backed securities, Alleghany discounts its best estimate of future cash flows at an effective rate equal to the original effective yield of the security or, in the case of floating rate securities, at the current coupon. Alleghany’s models include assumptions about prepayment speeds, default and delinquency rates, underlying collateral (if any), credit ratings, credit enhancements and other observable market data. For corporate bonds, Alleghany reviews business prospects, credit ratings and available information from asset managers and rating agencies for individual securities.
Changes in allowance for credit losses (reduction) for available for sale securities			(17,021)		$ 14,354
Change in allowance for credit losses on available for sale securities						$ 10,020
Other invested assets			415,333		415,333			$ 573,605
Commercial mortgage loans			685,412		685,412			686,206
Commercial mortgage loan investments in default or in arrears			0		$ 0
Minimum
Investments [Line Items]
Term of commercial mortgage loans					2 years
Maximum
Investments [Line Items]
Term of commercial mortgage loans					10 years
Pillar Capital Holdings Limited And Managed Fund
Investments [Line Items]
Other invested assets			$ 162,900		$ 162,900			$ 205,500
Pillar Capital Holdings Limited And Managed Fund | Reinsurance Segment
Investments [Line Items]
Investment in other invested asset		$ 175,000
Pillar Capital Holdings Limited And Managed Fund | Insurance Segment
Investments [Line Items]
Investment in other invested asset		$ 25,000
Debt Securities
Investments [Line Items]
Number of securities in an unrealized loss position | Investment			812		812
Number of securities in an unrealized loss position for 12 months or more | Investment			116		116
Wilbert Funeral Services, Inc
Investments [Line Items]
Gain on acquisition of equity ownership	$ 16,300		$ 16,300		$ 16,300
Equity interest percentage acquired	55.00%
Equity interest percentage							45.00%
Stranded Oil Resources Corporation
Investments [Line Items]
Write down of oil field assets			$ 44,500		74,400
Precision Cutting Technologies, Inc
Investments [Line Items]
Realized gain on reduction of contingent consideration liabilities					$ 5,000

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Amounts of Gross Realized Capital Gains and Gross Realized Capital Losses (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Investments Debt And Equity Securities [Abstract]
Gross realized capital gains	$ 28,500	$ 13,600	$ 87,400	$ 25,700
Gross realized capital (losses)	(66,600)	(1,200)	(112,500)	(8,900)
Net realized capital gains	$ (38,100)	$ 12,354	$ (25,074)	$ 16,796

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Allowance for Credit Losses on Available for Sale Securities (Detail) - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
		Jun. 30, 2020	Jun. 30, 2020
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning balance		$ 31,400
Change in allowance for credit losses on available for sale securities		(17,021)	$ 14,354
Charge-offs		(5,500)	(5,500)
Ending balance	[1]	$ 8,904	$ 8,904

[1] See Note 1(c) of this Form 10-Q for further information regarding Alleghany’s adoption of new credit loss accounting guidance.

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Summary of Rating of Debt securities (Detail) - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2020	Dec. 31, 2019
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		$ 14,950,006	$ 14,211,745
Percentage of debt securities		100.00%
AAA / Aaa
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		$ 2,050,900
Percentage of debt securities		13.70%
BBB / Baa
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		$ 2,059,700
Percentage of debt securities		13.80%
AA / Aa
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		$ 6,686,900
Percentage of debt securities		44.70%
A
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		$ 3,684,100
Percentage of debt securities		24.70%
Below BBB / Baa or Not Rated
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities	[1]	$ 468,400
Percentage of debt securities	[1]	3.10%
U.S. government obligations
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		$ 1,155,700	1,215,000
U.S. government obligations | AAA / Aaa
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		0
U.S. government obligations | BBB / Baa
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		0
U.S. government obligations | AA / Aa
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		1,155,700
U.S. government obligations | A
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		0
U.S. government obligations | Below BBB / Baa or Not Rated
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities	[1]	0
Municipal bonds
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		2,386,200	2,307,900
Municipal bonds | AAA / Aaa
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		226,700
Municipal bonds | BBB / Baa
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		69,800
Municipal bonds | AA / Aa
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		1,603,500
Municipal bonds | A
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		485,200
Municipal bonds | Below BBB / Baa or Not Rated
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities	[1]	1,000
Foreign government obligations
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		766,800	690,700
Foreign government obligations | AAA / Aaa
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		330,000
Foreign government obligations | BBB / Baa
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		1,100
Foreign government obligations | AA / Aa
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		338,600
Foreign government obligations | A
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		97,100
Foreign government obligations | Below BBB / Baa or Not Rated
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities	[1]	0
U.S. corporate bonds
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		4,002,400	3,359,000
U.S. corporate bonds | AAA / Aaa
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		40,700
U.S. corporate bonds | BBB / Baa
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		1,413,100
U.S. corporate bonds | AA / Aa
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		365,900
U.S. corporate bonds | A
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		1,847,600
U.S. corporate bonds | Below BBB / Baa or Not Rated
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities	[1]	335,100
Foreign corporate bonds
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		1,288,100	1,377,400
Foreign corporate bonds | AAA / Aaa
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		237,300
Foreign corporate bonds | BBB / Baa
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		301,600
Foreign corporate bonds | AA / Aa
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		98,500
Foreign corporate bonds | A
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		616,400
Foreign corporate bonds | Below BBB / Baa or Not Rated
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities	[1]	34,300
RMBS
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities	[2]	2,145,800	1,840,400
RMBS | AAA / Aaa
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		2,500
RMBS | BBB / Baa
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		1,000
RMBS | AA / Aa
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		2,138,200
RMBS | A
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		0
RMBS | Below BBB / Baa or Not Rated
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities	[1]	4,100
CMBS
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		871,300	871,700
CMBS | AAA / Aaa
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		287,600
CMBS | BBB / Baa
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		300
CMBS | AA / Aa
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		412,500
CMBS | A
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		170,900
CMBS | Below BBB / Baa or Not Rated
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities	[1]	0
Other asset-backed securities
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities	[3]	2,333,700	$ 2,549,600
Other asset-backed securities | AAA / Aaa
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		926,100
Other asset-backed securities | BBB / Baa
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		272,800
Other asset-backed securities | AA / Aa
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		574,000
Other asset-backed securities | A
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities		466,900
Other asset-backed securities | Below BBB / Baa or Not Rated
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities	[1]	$ 93,900

[1] Consists of $124.5 million of securities rated BB / Ba, $168.3 million of securities rated B, $20.1 million of securities rated CCC, $1.2 million of securities rated CC, $2.3 million of securities rated below CC and $152.0 million of not rated securities.

[2] Primarily includes government agency pass-through securities guaranteed by a government agency or government sponsored enterprise, among other types of RMBS.

[3] Includes $748.5 million and $834.2 million of collateralized loan obligations as of June 30, 2020 and December 31, 2019, respectively.

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Summary of Rating of Debt securities (Parenthetical) (Detail) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities	$ 14,950,006	$ 14,211,745
BB / Ba
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities	124,500
B
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities	168,300
CCC
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities	20,100
CC
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities	1,200
Below CC
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities	2,300
Not rated securities
Financing Receivable Allowance For Credit Losses [Line Items]
Debt securities	$ 152,000

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Gross Unrealized Losses and Related Fair Values for AFS Securities for which an Allowance for Credit Losses has Not Been Recorded Grouped by Duration of Time in Continuous Unrealized Loss Position (Detail) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Schedule of Available-for-sale Securities [Line Items]
Securities, less than 12 months, fair value	$ 2,248.9	$ 1,333.2
Securities, less than 12 months, gross unrealized losses	89.6	12.8
Securities, 12 months or more, fair value	526.0	998.0
Securities, 12 months or more, gross unrealized losses	33.4	20.0
Total, fair value	2,774.9	2,331.2
Total, gross unrealized losses	123.0	32.8
U.S. government obligations
Schedule of Available-for-sale Securities [Line Items]
Securities, less than 12 months, fair value	110.7	120.3
Securities, less than 12 months, gross unrealized losses	0.3	2.0
Securities, 12 months or more, fair value		99.7
Securities, 12 months or more, gross unrealized losses		0.8
Total, fair value	110.7	220.0
Total, gross unrealized losses	0.3	2.8
Municipal bonds
Schedule of Available-for-sale Securities [Line Items]
Securities, less than 12 months, fair value	95.2	90.2
Securities, less than 12 months, gross unrealized losses	1.8	1.3
Securities, 12 months or more, fair value		4.3
Total, fair value	95.2	94.5
Total, gross unrealized losses	1.8	1.3
Foreign government obligations
Schedule of Available-for-sale Securities [Line Items]
Securities, less than 12 months, fair value	92.1	198.5
Securities, less than 12 months, gross unrealized losses	0.5	1.2
Securities, 12 months or more, fair value		33.8
Securities, 12 months or more, gross unrealized losses		0.4
Total, fair value	92.1	232.3
Total, gross unrealized losses	0.5	1.6
U.S. corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Securities, less than 12 months, fair value	373.6	113.8
Securities, less than 12 months, gross unrealized losses	9.2	1.6
Securities, 12 months or more, fair value	4.2	27.6
Securities, 12 months or more, gross unrealized losses	0.3	0.7
Total, fair value	377.8	141.4
Total, gross unrealized losses	9.5	2.3
Foreign corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Securities, less than 12 months, fair value	252.4	212.0
Securities, less than 12 months, gross unrealized losses	6.0	2.3
Securities, 12 months or more, fair value	0.9	66.9
Securities, 12 months or more, gross unrealized losses		0.6
Total, fair value	253.3	278.9
Total, gross unrealized losses	6.0	2.9
RMBS
Schedule of Available-for-sale Securities [Line Items]
Securities, less than 12 months, fair value	307.9	48.7
Securities, less than 12 months, gross unrealized losses	0.6	0.3
Securities, 12 months or more, fair value	0.4	48.6
Securities, 12 months or more, gross unrealized losses		0.5
Total, fair value	308.3	97.3
Total, gross unrealized losses	0.6	0.8
CMBS
Schedule of Available-for-sale Securities [Line Items]
Securities, less than 12 months, fair value	332.3	126.8
Securities, less than 12 months, gross unrealized losses	25.0	1.4
Securities, 12 months or more, fair value	0.2	1.2
Total, fair value	332.5	128.0
Total, gross unrealized losses	25.0	1.4
Other asset-backed securities
Schedule of Available-for-sale Securities [Line Items]
Securities, less than 12 months, fair value	684.7	422.9
Securities, less than 12 months, gross unrealized losses	46.2	2.7
Securities, 12 months or more, fair value	520.3	715.9
Securities, 12 months or more, gross unrealized losses	33.1	17.0
Total, fair value	1,205.0	1,138.8
Total, gross unrealized losses	$ 79.3	$ 19.7

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Allowance for Credit Losses on Commercial Mortgage Loans (Detail) - USD ($) $ in Millions		3 Months Ended	6 Months Ended
		Jun. 30, 2020	Jun. 30, 2020
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning balance		$ 2.0
Provision for credit losses		(0.7)	$ 0.5
Ending balance		$ 1.3	1.3
Accounting Standards Update 2016-13
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning balance	[1]		$ 0.8

[1] See Note 1(c) of this Form 10-Q for further information regarding Alleghany’s adoption of new credit loss accounting guidance.

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Reinsurance Ceded - Additional Information (Detail) - Reinsurance Segment	6 Months Ended
	Jun. 30, 2020
Effects Of Reinsurance [Line Items]
Retrocession protection term	1 year
Term of catastrophe bonds	4 years

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Reinsurance Recoverables After Allowance for Credit Losses (Detail) - USD ($) $ in Thousands		Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2018
Insurance [Abstract]
Reinsurance recoverables on paid losses		$ 76,100		$ 98,100
Ceded outstanding loss and LAE	[1]	1,470,500		1,583,900	$ 1,557,100	$ 1,857,400
Reinsurance recoverables, before allowance for credit losses		1,546,600		1,682,000
Allowance for credit losses		(6,900)	$ (6,800)
Total		$ 1,539,717		$ 1,681,962

[1] Reinsurance recoverables in this table include only ceded loss and LAE reserves.

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Information Regarding Concentration of Reinsurance Recoverables and The Ratings Profile of Our Reinsurers (Detail) - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Ceded Credit Risk [Line Items]
Reinsurance recoverables, before allowance for credit losses		$ 1,546,600		$ 1,682,000
Allowance for credit losses		(6,900)	$ (6,800)
Reinsurance recoverables		1,539,717		$ 1,681,962
Reinsurance Recoverable | Reinsurer Concentration Risk
Ceded Credit Risk [Line Items]
Reinsurance recoverables, before allowance for credit losses	[1],[2]	$ 1,546,600
Reinsurance recoverable as percentage of total reinsurance recoverables	[1],[2]	100.00%
Allowance for credit losses	[2]	$ (6,900)
Reinsurance recoverables	[2]	1,539,700
Syndicates at Lloyd's of London | AM Best, A Rating | Reinsurance Recoverable | Reinsurer Concentration Risk
Ceded Credit Risk [Line Items]
Reinsurance recoverables, before allowance for credit losses	[2],[3]	$ 128,200
Reinsurance recoverable as percentage of total reinsurance recoverables	[2],[3]	8.30%
Kane SAC Ltd, Rondout Segregated Account | Not Rated | Reinsurance Recoverable | Reinsurer Concentration Risk
Ceded Credit Risk [Line Items]
Reinsurance recoverables, before allowance for credit losses	[2],[3],[4]	$ 106,000
Reinsurance recoverable as percentage of total reinsurance recoverables	[2],[3],[4]	6.90%
PartnerRe Ltd | AM Best, A Rating | Reinsurance Recoverable | Reinsurer Concentration Risk
Ceded Credit Risk [Line Items]
Reinsurance recoverables, before allowance for credit losses	[2],[3]	$ 94,400
Reinsurance recoverable as percentage of total reinsurance recoverables	[2],[3]	6.10%
Fairfax Financial Holdings Ltd | AM Best, A Rating | Reinsurance Recoverable | Reinsurer Concentration Risk
Ceded Credit Risk [Line Items]
Reinsurance recoverables, before allowance for credit losses	[2],[3]	$ 91,700
Reinsurance recoverable as percentage of total reinsurance recoverables	[2],[3]	5.90%
Swiss Reinsurance Company | A+ (Superior) | Reinsurance Recoverable | Reinsurer Concentration Risk
Ceded Credit Risk [Line Items]
Reinsurance recoverables, before allowance for credit losses	[2],[3]	$ 90,500
Reinsurance recoverable as percentage of total reinsurance recoverables	[2],[3]	5.90%
Third Point Reinsurance Group | AM Best, A- Rating | Reinsurance Recoverable | Reinsurer Concentration Risk
Ceded Credit Risk [Line Items]
Reinsurance recoverables, before allowance for credit losses	[2],[3]	$ 82,800
Reinsurance recoverable as percentage of total reinsurance recoverables	[2],[3]	5.40%
RenaissanceRe Holdings Ltd | A+ (Superior) | Reinsurance Recoverable | Reinsurer Concentration Risk
Ceded Credit Risk [Line Items]
Reinsurance recoverables, before allowance for credit losses	[2],[3]	$ 75,200
Reinsurance recoverable as percentage of total reinsurance recoverables	[2],[3]	4.90%
W.R. Berkley Corporation | A+ (Superior) | Reinsurance Recoverable | Reinsurer Concentration Risk
Ceded Credit Risk [Line Items]
Reinsurance recoverables, before allowance for credit losses	[2],[3]	$ 69,200
Reinsurance recoverable as percentage of total reinsurance recoverables	[2],[3]	4.50%
Kane SAC Ltd, Bowery Segregated Account | Not Rated | Reinsurance Recoverable | Reinsurer Concentration Risk
Ceded Credit Risk [Line Items]
Reinsurance recoverables, before allowance for credit losses	[2],[3],[4]	$ 60,400
Reinsurance recoverable as percentage of total reinsurance recoverables	[2],[3],[4]	3.90%
Chubb | A+ (Superior) | Reinsurance Recoverable | Reinsurer Concentration Risk
Ceded Credit Risk [Line Items]
Reinsurance recoverables, before allowance for credit losses	[2],[3]	$ 57,200
Reinsurance recoverable as percentage of total reinsurance recoverables	[2],[3]	3.70%
All other reinsurers | Reinsurance Recoverable | Reinsurer Concentration Risk
Ceded Credit Risk [Line Items]
Reinsurance recoverables, before allowance for credit losses	[2]	$ 691,000
Reinsurance recoverable as percentage of total reinsurance recoverables	[2]	44.50%
Ceded Credit Risk, Secured | Reinsurance Recoverable | Reinsurer Concentration Risk
Ceded Credit Risk [Line Items]
Reinsurance recoverable as percentage of total reinsurance recoverables	[2],[4]	36.90%
Reinsurance recoverables	[2],[4]	$ 570,800

[1] Approximately 70 percent of our reinsurance recoverables balance as of June 30, 2020 was due from reinsurers having an A.M. Best Company, Inc. financial strength rating of A (Excellent) or higher, with a majority of the other reinsurance recoverables being secured by funds held, trust agreements or letters of credit.

[2] Reinsurance recoverables reflect amounts due from one or more reinsurance subsidiaries of the listed company.

[3] Represents the A.M. Best Company, Inc. financial strength rating for the applicable reinsurance subsidiary or subsidiaries from which the reinsurance recoverable is due.

[4] Represents reinsurance recoverables secured by funds held, trust agreements or letters of credit.

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Information Regarding Concentration of Reinsurance Recoverables and The Ratings Profile of Our Reinsurers (Parenthetical) (Detail) - Reinsurance Recoverable - Reinsurer Concentration Risk	6 Months Ended
	Jun. 30, 2020
Ceded Credit Risk [Line Items]
Reinsurance recoverable as percentage of total reinsurance recoverables	100.00%	[1],[2]
Reinsurers Rated A Or Higher
Ceded Credit Risk [Line Items]
Reinsurance recoverable as percentage of total reinsurance recoverables	70.00%

[1] Approximately 70 percent of our reinsurance recoverables balance as of June 30, 2020 was due from reinsurers having an A.M. Best Company, Inc. financial strength rating of A (Excellent) or higher, with a majority of the other reinsurance recoverables being secured by funds held, trust agreements or letters of credit.

[2] Reinsurance recoverables reflect amounts due from one or more reinsurance subsidiaries of the listed company.

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Allowance for Credit Losses on Reinsurance Recoverables (Detail) - USD ($) $ in Millions		3 Months Ended	6 Months Ended
		Jun. 30, 2020	Jun. 30, 2020
Allowance for Credit Losses
Beginning balance		$ 6.8
Provision for credit losses	[1]	0.1	$ 3.6
Balance as of June 30, 2020		$ 6.9	6.9
Accounting Standards Update 2016-13
Allowance for Credit Losses
Beginning balance	[2]		$ 3.3

[1] For the six months ended June 30, 2020, primarily reflects the change in estimates of expected credit losses based on current conditions and reasonable and supportable forecasts, including estimates from the Pandemic, as defined in Note 9(a) of this Form 10-Q.

[2] See Note 1(c) of this Form 10-Q for further information regarding Alleghany’s adoption of new credit loss accounting guidance.

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Activity in the Liability for Loss and Loss Adjustment Expense (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Activity in liability for loss and loss adjustment expense
Reserves as of January 1				$ 11,928,359	$ 12,250,300
Less: reinsurance recoverables	[1]			1,583,900	1,857,400
Net reserves as of January 1				10,344,500	10,392,900
Other adjustments				(2,300)	(1,400)
Incurred loss and LAE, net of reinsurance, related to:
Current year				2,145,500	1,683,300
Prior years		$ (34,700)	$ (56,600)	(93,700)	(94,000)
Total incurred loss and LAE, net of reinsurance		1,024,362	796,803	2,051,806	1,589,301
Paid loss and LAE, net of reinsurance, related to:
Current year	[2]			271,000	248,000
Prior years	[2]			1,523,700	1,651,500
Total paid loss and LAE, net of reinsurance	[2]			1,794,700	1,899,500
Foreign currency exchange rate effect				(18,500)	(6,600)
Net reserves as of June 30		10,580,800	10,074,700	10,580,800	10,074,700
Reinsurance recoverables as of June 30	[1]	1,470,500	1,557,100	1,470,500	1,557,100
Reserves as of June 30		$ 12,051,334	$ 11,631,800	$ 12,051,334	$ 11,631,800

[1] Reinsurance recoverables in this table include only ceded loss and LAE reserves.

[2] Includes paid losses, net of reinsurance, related to commutations.

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(Favorable) Unfavorable Prior Accident Year Loss Reserve Development (Detail) - USD ($) $ in Millions		3 Months Ended				6 Months Ended
		Jun. 30, 2020		Jun. 30, 2019		Jun. 30, 2020		Jun. 30, 2019
Claims Development [Line Items]
Claims incurred related to prior years		$ (34.7)		$ (56.6)		$ (93.7)		$ (94.0)
Reinsurance Segment
Claims Development [Line Items]
Claims incurred related to prior years		(51.2)		(44.8)		(108.9)		(81.2)
Reinsurance Segment | Property
Claims Development [Line Items]
Claims incurred related to prior years		(13.0)		(16.2)		(59.7)		(26.9)
Reinsurance Segment | Property | Property Catastrophe
Claims Development [Line Items]
Claims incurred related to prior years		0.5		(9.9)	[1]	(31.9)	[2]	(1.5)	[3]
Reinsurance Segment | Property | Property Non-catastrophe
Claims Development [Line Items]
Claims incurred related to prior years		(13.5)	[4]	(6.3)	[5]	(27.8)	[4]	(25.4)	[6]
Reinsurance Segment | Casualty & Other
Claims Development [Line Items]
Claims incurred related to prior years		(38.2)		(28.6)		(49.2)		(54.3)
Reinsurance Segment | Casualty & Other | Malpractice Treaties
Claims Development [Line Items]
Claims incurred related to prior years	[7]			(1.4)				(1.4)
Reinsurance Segment | Casualty & Other | Catastrophe events
Claims Development [Line Items]
Claims incurred related to prior years		(3.8)		0.7		(2.4)		(0.5)
Reinsurance Segment | Casualty & Other | All Other Casualty and Other
Claims Development [Line Items]
Claims incurred related to prior years		(34.4)	[8]	(27.9)	[9]	(46.8)	[10]	(52.4)	[11]
Insurance Segment | RSUI
Claims Development [Line Items]
Claims incurred related to prior years		16.5		(12.5)		15.0		(16.2)
Insurance Segment | RSUI | Casualty Insurance
Claims Development [Line Items]
Claims incurred related to prior years		$ 16.5	[12]	(12.1)	[13]	15.5	[12]	(17.7)	[13]
Insurance Segment | RSUI | Property and Other Insurance
Claims Development [Line Items]
Claims incurred related to prior years				(0.4)		(0.5)		1.5	[14]
Insurance Segment | CapSpecialty Incorporated
Claims Development [Line Items]
Claims incurred related to prior years				$ 0.7		$ 0.2		$ 3.4	[15]

[1] Primarily reflects favorable prior accident year loss reserve development related to wildfires in California in the 2018 accident year.

[2] Primarily reflects favorable prior accident year loss reserve development related to Typhoon Hagibis in the 2019 accident year and, to a lesser extent, catastrophic events in the 2018 accident year.

[3] Primarily reflects favorable prior accident year loss reserve development related to wildfires in California in the 2018 accident year, partially offset by unfavorable prior accident year loss reserve development related to Typhoon Jebi in the 2018 accident year.

[4] Primarily reflects favorable prior accident year loss reserve development in the 2017 and 2019 accident years.

[5] Primarily reflects favorable prior accident year loss reserve development in the 2018 accident year.

[6] Primarily reflects favorable prior accident year loss reserve development in the 2016 and 2018 accident years.

[7] Represents certain malpractice treaties pursuant to which the increased underwriting profits created by the favorable prior accident year loss reserve development are largely retained by the cedants. As a result, the favorable prior accident year loss reserve development is largely offset by an increase in profit commission expense incurred when such favorable prior accident year loss reserve development occurs.

[8] Primarily reflects favorable prior accident year loss reserve development in the longer-tailed lines of business in the 2016 and earlier accident years and in the shorter-tailed lines of business in the 2017 accident year, partially offset by unfavorable prior accident year development in the shorter-tailed lines of business in the 2018 and 2019 accident years.

[9] Primarily reflects favorable prior accident year loss reserve development in the longer-tailed lines of business in the 2013 and prior accident years.

[10] Primarily reflects favorable prior accident year loss reserve development in the longer-tailed lines of business in the 2013 and earlier accident years and in the shorter-tailed lines of business in the 2017 accident year, partially offset by unfavorable prior accident year development in the shorter-tailed lines of business in the 2014 through 2016, 2018 and 2019 accident years.

[11] Primarily reflects favorable prior accident year loss reserve development in the longer-tailed lines of business in the 2013 and prior accident years and in the shorter-tailed lines of business in the 2012 through 2014 accident years.

[12] Primarily reflects unfavorable prior accident year loss reserve development in the professional liability lines of business in the 2017 through 2019 accident years, partially offset by favorable prior accident year loss reserve development in the directors’ and officers’ liability and umbrella/excess lines of business in the 2011 through 2015 accident years.

[13] Primarily reflects favorable prior accident year loss reserve development in the directors’ and officers’ liability and umbrella/excess lines of business in the 2011 through 2015 accident years, partially offset by unfavorable prior accident year loss reserve development in the professional liability lines of business in recent accident years.

[14] Primarily reflects unfavorable prior accident year loss reserve development related to the assumed property reinsurance lines of business from catastrophe losses in recent accident years, partially offset by favorable prior accident year loss reserve development related to Superstorm Sandy in the 2012 accident year and by Hurricane Harvey in the 2017 accident year.

[15] Primarily reflects unfavorable prior accident year loss reserve development in certain specialty lines of business written through a program administrator in connection with a terminated program in the 2009 and 2010 accident years.

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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2020	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income tax expense related to the CARES Act of 2020	$ 6.9
Effective income tax rate		21.70%	19.30%
Interest or penalties accrued for uncertain tax positions	$ 0.0	$ 0.0

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Stockholders' Equity - Additional Information (Detail) - USD ($)		1 Months Ended	6 Months Ended
	Mar. 15, 2020	Feb. 29, 2020	Jun. 30, 2020	Sep. 30, 2019	Jun. 30, 2018
Stockholders Equity Note [Line Items]
Remaining authorized repurchases under share repurchase program			$ 582,900,000
Par value of common stock			$ 1.00
Dividends paid			$ 215,013,000
Dividend Declared in 2020
Stockholders Equity Note [Line Items]
Special dividend declared per share		$ 15.00
Dividend record date		Mar. 05, 2020
Dividend payable nature			special
Dividends paid	$ 215,000,000.0
Stock Repurchase Programs 2019
Stockholders Equity Note [Line Items]
Aggregate amount of common stock authorized for repurchase				$ 500,000,000.0
Stock Repurchase Programs 2018
Stockholders Equity Note [Line Items]
Aggregate amount of common stock authorized for repurchase					$ 400,000,000.0

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Schedule of Common Stock Repurchases (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			6 Months Ended
	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Stockholders Equity Note [Abstract]
Shares repurchased		19,246		62,540	148,813
Cost of shares repurchased	$ 44,268	$ 12,666	$ 80,486	$ 44,300	$ 93,200
Average price per share repurchased		$ 658.09		$ 707.84	$ 625.96

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Reconciliation of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 7,857,062	$ 8,236,487	$ 8,776,734	$ 7,692,710
Other comprehensive income (loss), net of tax:
Ending Balance	8,456,239	8,685,914	8,456,239	8,685,914
Unrealized Appreciation of Investments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			321,000	(61,600)
Other comprehensive income (loss), net of tax:
Other comprehensive income (loss) before reclassifications			135,100	356,000
Reclassifications from accumulated other comprehensive income	(5,600)	(9,800)	(16,400)	(5,400)
Total			118,700	350,600
Ending Balance	439,700	289,000	439,700	289,000
Unrealized Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(121,800)	(124,700)
Other comprehensive income (loss), net of tax:
Other comprehensive income (loss) before reclassifications			1,100	2,300
Total			1,100	2,300
Ending Balance	(120,700)	(122,400)	(120,700)	(122,400)
Retirement Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(27,900)	(15,700)
Other comprehensive income (loss), net of tax:
Other comprehensive income (loss) before reclassifications			900	1,100
Total			900	1,100
Ending Balance	(27,000)	(14,600)	(27,000)	(14,600)
Accumulated Other Comprehensive Income (loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(129,343)	(14,157)	171,350	(202,003)
Other comprehensive income (loss), net of tax:
Other comprehensive income (loss) before reclassifications			137,100	359,400
Reclassifications from accumulated other comprehensive income			(16,400)	(5,400)
Total			120,700	354,000
Ending Balance	$ 291,993	$ 151,964	$ 291,993	$ 151,964

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Reclassifications of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net realized capital gains		$ 38,100	$ (12,354)	$ 25,074	$ (16,796)
Change in allowance for credit losses on available for sale securities		(17,021)		14,354
Change in allowance for credit losses on available for sale securities					10,020
Income taxes		53,356	71,356	(51,364)	179,868
Unrealized Appreciation of Investments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications		(5,600)	(9,800)	(16,400)	(5,400)
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Appreciation of Investments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net realized capital gains	[1]	9,900	(12,400)	(35,200)	(16,800)
Change in allowance for credit losses on available for sale securities		(17,000)		14,400
Change in allowance for credit losses on available for sale securities					10,000
Income taxes		$ 1,500	$ 2,600	$ 4,400	$ 1,400

[1] For the three months ended June 30, 2020, excludes the $16.3 million Wilbert Remeasurement Gain, and $44.5 million impairment charge from a write-down of SORC oil field assets.  For the six months ended June 30, 2020, excludes the $16.3 million Wilbert Remeasurement Gain, a $7.1 million realized loss as a result of an early redemption of debt, a $74.4 million impairment charge from a write-down of SORC oil field assets and a $5.0 million realized gain from a reduction of certain contingent consideration liabilities.  See Note 3(e) of this Form 10-Q for additional information.

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Reclassifications of Accumulated Other Comprehensive Income (Loss) (Parenthetical) (Detail) - USD ($) $ in Millions		3 Months Ended	6 Months Ended
	Apr. 01, 2020	Jun. 30, 2020	Jun. 30, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Loss on early redemption of debt			$ (7.1)
Realized gain on reduction of contingent consideration liabilities			5.0
Wilbert Funeral Services, Inc
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Remeasurement gain from acquisition	$ 16.3	$ 16.3	16.3
Alleghany Corporation | 2020 Senior Notes
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Loss on early redemption of debt			(7.1)
Stranded Oil Resources Corporation
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Write down of oil field assets		$ 44.5	$ 74.4

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Reconciliation of Earnings and Share Data used in Basic and Diluted Earnings per Share Computations (Detail) - USD ($) $ in Thousands		3 Months Ended				6 Months Ended
		Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings Per Share [Abstract]
Net earnings (losses) available to Alleghany stockholders		$ 177,378	$ (361,218)	$ 295,459	$ 440,227	$ (183,840)	$ 735,686
Effect of dilutive securities		0		0		(8,400)	0
Income available to common stockholders for diluted earnings per share		$ 177,400		$ 295,500		$ (192,200)	$ 735,700
Weighted average common shares outstanding applicable to basic earnings per share		14,310,874		14,439,545		14,325,772	14,460,400
Effect of dilutive securities		0		0		35,797	14,960
Adjusted weighted average common shares outstanding applicable to diluted earnings per share		14,310,874		14,439,545		14,361,569	14,475,360
Contingently issuable shares	[1]					16,758	46,973

[1] Contingently issuable shares were potentially available in the periods presented, but were not included in the diluted earnings per share computations because the impact was anti-dilutive to the earnings per share calculation.

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Commitments and Contingencies - Additional Information (Detail) - USD ($)	Jun. 30, 2020	Dec. 31, 2019
Commitments and Contingencies Disclosure [Line Items]
Other invested assets	$ 415,333,000	$ 573,605,000
Hotel Development Projects
Commitments and Contingencies Disclosure [Line Items]
Other invested assets	800,000
Hotel Development Projects | Maximum
Commitments and Contingencies Disclosure [Line Items]
Guaranteed debt of entities	$ 5,600,000

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Segments of Business - Additional Information (Detail) $ in Millions		6 Months Ended
	Apr. 01, 2020 USD ($)	Jun. 30, 2020 Segment
Segment Reporting Information [Line Items]
Number of reportable segments | Segment		3
Wilbert Funeral Services, Inc
Segment Reporting Information [Line Items]
Equity interest percentage	100.00%
Equity interest percentage acquired	55.00%
Purchase price for acquisition	$ 121.3
Cash consideration paid for acquisition	46.3
Incremental debt acquired	75.0
Goodwill	62.9
Wilbert Funeral Services, Inc | Trade Name
Segment Reporting Information [Line Items]
Indefinite-lived intangible assets acquired	26.2
Wilbert Funeral Services, Inc | Customer Relationship
Segment Reporting Information [Line Items]
Finite-lived intangible assets acquired	21.5
Wilbert Funeral Services, Inc | License Agreements
Segment Reporting Information [Line Items]
Finite-lived intangible assets acquired	$ 14.9

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Results for Reportable Segments and Corporate Activities (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting Information [Line Items]
Gross premiums written		$ 1,721,200	$ 1,670,800	$ 3,491,800	$ 3,277,400
Net premiums written		1,478,000	1,446,500	3,011,700	2,832,100
Net premiums earned		1,394,868	1,356,008	2,839,288	2,653,317
Net loss and LAE		1,024,362	796,803	2,051,806	1,589,301
Commissions, brokerage and other underwriting expenses		410,017	444,316	851,413	864,442
Underwriting (loss) profit	[1]	(39,500)	114,900	(63,900)	199,600
Net investment income		118,691	142,745	230,673	265,794
Change in the fair value of equity securities		242,186	143,660	(280,790)	536,013
Net realized capital gains		(38,100)	12,354	(25,074)	16,796
Change in allowance for credit losses on available for sale securities		17,021		(14,354)
Change in allowance for credit losses on available for sale securities					(10,020)
Noninsurance revenue		492,701	603,906	960,550	1,118,029
Other operating expenses		510,306	581,474	976,967	1,083,892
Corporate administration		18,579	25,967	4,272	45,336
Amortization of intangible assets		12,093	8,795	21,661	15,695
Interest expense		22,194	25,129	40,550	48,660
(Losses) earnings before income taxes		229,816	376,189	(236,376)	932,603
Operating Segments
Segment Reporting Information [Line Items]
Gross premiums written		1,729,800	1,676,900	3,508,700	3,290,300
Net premiums written		1,478,000	1,446,500	3,011,700	2,832,100
Net premiums earned		1,394,900	1,356,000	2,839,300	2,653,300
Net loss and LAE		1,024,400	796,800	2,051,800	1,589,300
Commissions, brokerage and other underwriting expenses		410,000	444,300	851,400	864,400
Underwriting (loss) profit	[1]	(39,500)	114,900	(63,900)	199,600
Net investment income		115,400	139,200	226,800	258,500
Change in the fair value of equity securities		242,200	143,300	(279,400)	532,400
Net realized capital gains		6,300	12,400	56,500	16,800
Change in allowance for credit losses on available for sale securities		16,600		(14,100)
Change in allowance for credit losses on available for sale securities					(10,000)
Noninsurance revenue		491,500	600,300	956,100	1,110,700
Other operating expenses		506,900	574,500	967,400	1,069,600
Corporate administration		500	1,800	(1,600)	2,800
Amortization of intangible assets		12,100	8,800	21,700	15,700
Interest expense		11,100	11,500	21,600	22,600
(Losses) earnings before income taxes		301,900	413,500	(127,100)	997,300
Operating Segments | Reinsurance Segment
Segment Reporting Information [Line Items]
Gross premiums written		1,153,900	1,210,700	2,481,400	2,442,300
Net premiums written		1,086,500	1,112,900	2,297,500	2,220,500
Net premiums earned		1,071,000	1,074,900	2,204,100	2,104,100
Net loss and LAE		778,200	645,100	1,640,400	1,298,300
Commissions, brokerage and other underwriting expenses		323,100	353,900	672,900	689,900
Underwriting (loss) profit	[1]	(30,300)	75,900	(109,200)	115,900
Operating Segments | Reinsurance Segment | Property
Segment Reporting Information [Line Items]
Gross premiums written		413,300	381,600	825,900	796,700
Net premiums written		355,800	305,900	668,700	622,100
Net premiums earned		328,700	303,200	650,100	612,100
Net loss and LAE		273,400	136,200	521,300	298,800
Commissions, brokerage and other underwriting expenses		96,800	103,800	202,200	207,500
Underwriting (loss) profit	[1]	(41,500)	63,200	(73,400)	105,800
Operating Segments | Reinsurance Segment | Casualty & Other
Segment Reporting Information [Line Items]
Gross premiums written	[2]	740,600	829,100	1,655,500	1,645,600
Net premiums written	[2]	730,700	807,000	1,628,800	1,598,400
Net premiums earned	[2]	742,300	771,700	1,554,000	1,492,000
Net loss and LAE	[2]	504,800	508,900	1,119,100	999,500
Commissions, brokerage and other underwriting expenses	[2]	226,300	250,100	470,700	482,400
Underwriting (loss) profit	[1],[2]	11,200	12,700	(35,800)	10,100
Operating Segments | Insurance Segment
Segment Reporting Information [Line Items]
Gross premiums written		575,900	466,200	1,027,300	848,000
Net premiums written		391,500	333,600	714,200	611,600
Net premiums earned		323,900	281,100	635,200	549,200
Net loss and LAE		246,200	151,700	411,400	291,000
Commissions, brokerage and other underwriting expenses		86,900	90,400	178,500	174,500
Underwriting (loss) profit	[1]	(9,200)	39,000	45,300	83,700
Operating Segments | Insurance Segment | RSUI
Segment Reporting Information [Line Items]
Gross premiums written		474,700	372,400	840,600	671,400
Net premiums written		300,000	246,900	544,500	448,300
Net premiums earned		241,500	202,400	470,900	394,800
Net loss and LAE		196,000	105,600	311,900	199,900
Commissions, brokerage and other underwriting expenses		52,700	57,900	110,600	111,400
Underwriting (loss) profit	[1]	(7,200)	38,900	48,400	83,500
Operating Segments | Insurance Segment | CapSpecialty Incorporated
Segment Reporting Information [Line Items]
Gross premiums written		101,200	93,800	186,700	176,600
Net premiums written		91,500	86,700	169,700	163,300
Net premiums earned		82,400	78,700	164,300	154,400
Net loss and LAE		50,200	46,100	99,500	91,100
Commissions, brokerage and other underwriting expenses		34,200	32,500	67,900	63,100
Underwriting (loss) profit	[1]	(2,000)	100	(3,100)	200
Operating Segments | Reinsurance Segment and Insurance Segment
Segment Reporting Information [Line Items]
Gross premiums written		1,729,800	1,676,900	3,508,700	3,290,300
Net premiums written		1,478,000	1,446,500	3,011,700	2,832,100
Net premiums earned		1,394,900	1,356,000	2,839,300	2,653,300
Net loss and LAE		1,024,400	796,800	2,051,800	1,589,300
Commissions, brokerage and other underwriting expenses		410,000	444,300	851,400	864,400
Underwriting (loss) profit	[1]	(39,500)	114,900	(63,900)	199,600
Net investment income		115,400	138,300	225,000	256,300
Change in the fair value of equity securities		242,200	143,300	(279,400)	532,400
Net realized capital gains		(10,100)	12,200	35,100	16,200
Change in allowance for credit losses on available for sale securities		16,600		(14,100)
Change in allowance for credit losses on available for sale securities					(10,000)
Noninsurance revenue		8,300	6,600	15,600	12,000
Other operating expenses		33,300	26,200	43,100	55,800
Corporate administration		500	1,800	(1,600)	2,800
Amortization of intangible assets		200	400	500	600
Interest expense		6,800	6,800	13,500	13,600
(Losses) earnings before income taxes		292,100	380,100	(137,200)	933,700
Operating Segments | Alleghany Capital Corporation Segment
Segment Reporting Information [Line Items]
Net investment income			900	1,800	2,200
Net realized capital gains		16,400	200	21,400	600
Noninsurance revenue		483,200	593,700	940,500	1,098,700
Other operating expenses		473,600	548,300	924,300	1,013,800
Amortization of intangible assets		11,900	8,400	21,200	15,100
Interest expense		4,300	4,700	8,100	9,000
(Losses) earnings before income taxes		9,800	33,400	10,100	63,600
Corporate activities
Segment Reporting Information [Line Items]
Gross premiums written		(8,600)	(6,100)	(16,900)	(12,900)
Net investment income		3,300	3,500	3,900	7,300
Change in the fair value of equity securities			400	(1,400)	3,600
Net realized capital gains		(44,400)		(81,600)
Change in allowance for credit losses on available for sale securities		400		(300)
Noninsurance revenue		1,200	3,600	4,500	7,300
Other operating expenses		3,400	7,000	9,600	14,300
Corporate administration		18,100	24,200	5,800	42,500
Interest expense		11,100	13,600	19,000	26,100
(Losses) earnings before income taxes		$ (72,100)	$ (37,300)	$ (109,300)	$ (64,700)

[1] Underwriting profit represents net premiums earned less net loss and LAE and commissions, brokerage and other underwriting expenses, all as determined in accordance with GAAP, and does not include net investment income, change in the fair value of equity securities, net realized capital gains, change in allowance for credit losses on available for sale securities, noninsurance revenue, other operating expenses, corporate administration, amortization of intangible assets or interest expense. Underwriting profit does not replace earnings before income taxes determined in accordance with GAAP as a measure of profitability. Rather, Alleghany believes that underwriting profit enhances the understanding of its reinsurance and insurance segments’ operating results by highlighting net earnings attributable to their underwriting performance. Earnings before income taxes (a GAAP measure) may show a profit despite an underlying underwriting loss. Where underwriting losses persist over extended periods, a reinsurance or an insurance company’s ability to continue as an ongoing concern may be at risk. Therefore, Alleghany views underwriting profit as an important measure in the overall evaluation of performance.

[2] Primarily consists of the following reinsurance lines of business: directors’ and officers’ liability; errors and omissions liability; general liability; medical malpractice; ocean marine and aviation; auto liability; accident and health; mortgage reinsurance; surety; and credit.

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Summary of Identifiable Assets and Equity (Detail) - USD ($) $ in Thousands	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Identifiable Assets	$ 27,620,871		$ 26,931,604
Invested Assets and Cash	20,262,200
Equity Attributable to Alleghany	8,456,239	$ 7,857,062	$ 8,776,734	$ 8,685,914	$ 8,236,487	$ 7,692,710
Operating Segments
Segment Reporting Information [Line Items]
Identifiable Assets	26,701,200
Invested Assets and Cash	19,387,500
Equity Attributable to Alleghany	8,739,900
Operating Segments | Reinsurance Segment
Segment Reporting Information [Line Items]
Identifiable Assets	17,356,000
Invested Assets and Cash	13,990,700
Equity Attributable to Alleghany	5,154,200
Operating Segments | Insurance Segment
Segment Reporting Information [Line Items]
Identifiable Assets	7,072,200
Invested Assets and Cash	5,324,300
Equity Attributable to Alleghany	2,572,500
Operating Segments | Reinsurance Segment and Insurance Segment
Segment Reporting Information [Line Items]
Identifiable Assets	24,428,200
Invested Assets and Cash	19,315,000
Equity Attributable to Alleghany	7,726,700
Operating Segments | Alleghany Capital Corporation Segment
Segment Reporting Information [Line Items]
Identifiable Assets	2,273,000
Invested Assets and Cash	72,500
Equity Attributable to Alleghany	1,013,200
Corporate activities
Segment Reporting Information [Line Items]
Identifiable Assets	919,700
Invested Assets and Cash	874,700
Equity Attributable to Alleghany	$ (283,700)

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Summary of Alleghany Capital Non-Insurance Revenue (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Other Revenues [Line Items]
Noninsurance revenue		$ 492,701	$ 603,906	$ 960,550	$ 1,118,029
Operating Segments
Other Revenues [Line Items]
Noninsurance revenue		491,500	600,300	956,100	1,110,700
Operating Segments | Alleghany Capital Corporation Segment
Other Revenues [Line Items]
Noninsurance revenue		483,200	593,700	940,500	1,098,700
Operating Segments | Alleghany Capital Corporation Segment | Industrial Segment
Other Revenues [Line Items]
Noninsurance revenue	[1]	280,600	318,300	523,100	578,400
Operating Segments | Alleghany Capital Corporation Segment | Non-industrial Segment
Other Revenues [Line Items]
Noninsurance revenue	[2]	$ 202,600	275,100	417,300	520,000
Operating Segments | Alleghany Capital Corporation Segment | Corporate & Other
Other Revenues [Line Items]
Noninsurance revenue			$ 300	$ 100	$ 300

[1] For the three and six months ended June 30, 2020 and 2019, the vast majority of noninsurance revenue was recognized as goods and services transferred to customers over time.

[2] For the three and six months ended June 30, 2020, approximately 74 percent and 78 percent, respectively, of noninsurance revenue was recognized as services transferred to customers over time, with the remainder recognized as goods transferred at a point in time. For the three and six months ended June 30, 2019, 77 percent and 72 percent, respectively, of noninsurance revenue was recognized as services transferred to customers over time, with the remainder recognized as goods transferred at a point in time.

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Summary of Alleghany Capital Non-Insurance Revenue (Parenthetical) (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Operating Segments | Alleghany Capital Corporation Segment | Non-Industrial Segment | Transferred over Time
Other Revenues [Line Items]
Noninsurance revenue percentage	74.00%	77.00%	78.00%	72.00%

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Debt - Additional Information (Detail) - USD ($) $ in Thousands				6 Months Ended
	May 18, 2020	Jan. 15, 2020	Sep. 20, 2010	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Debt Instrument [Line Items]
Interest paid				$ 45,430	$ 48,203
Loss on early redemption of debt				(7,100)
Senior Notes and other debt				2,017,903		$ 1,751,113
Operating Segments | Alleghany Capital Corporation Segment
Debt Instrument [Line Items]
Senior Notes and other debt				438,300		367,100
Alleghany Corporation | 2020 Senior Notes
Debt Instrument [Line Items]
Senior notes, face value			$ 300,000
Senior notes, maturity date			Sep. 15, 2020
Senior notes, interest rate			5.625%
Senior notes, issuance rate			99.60%
Proceeds from issuance of Senior notes			$ 298,900
Senior notes, effective yield			5.67%
Cost of senior note redemption		$ 312,700
Aggregate principal amount redeemed		300,000
Redemption premium		7,100
Interest paid		$ 5,600
Loss on early redemption of debt				$ (7,100)
Alleghany Corporation | 2030 Senior Notes
Debt Instrument [Line Items]
Senior notes, face value	$ 500,000
Senior notes, maturity date	May 15, 2030
Senior notes, frequency of interest payment				Interest on the 2030 Senior Notes is payable semi-annually in arrears on May 15 and November 15 of each year.
Senior notes, interest rate	3.625%
Senior notes, issuance rate	99.90%
Proceeds from issuance of Senior notes	$ 494,800
Senior notes, effective yield	3.64%
Amortization of deferred charges	$ 4,600
Jazwares, LLC | Operating Segments | Alleghany Capital Corporation Segment
Debt Instrument [Line Items]
Senior Notes and other debt				$ 161,600
Wilbert Funeral Services, Inc | Operating Segments | Alleghany Capital Corporation Segment
Debt Instrument [Line Items]
Senior Notes and other debt				74,400
Kentucky Trailer | Operating Segments | Alleghany Capital Corporation Segment
Debt Instrument [Line Items]
Senior Notes and other debt				65,200
WWSC Holdings, LLC | Operating Segments | Alleghany Capital Corporation Segment
Debt Instrument [Line Items]
Senior Notes and other debt				58,000
Integrated Project Services LLC | Operating Segments | Alleghany Capital Corporation Segment
Debt Instrument [Line Items]
Senior Notes and other debt				43,600
Precision Cutting Technologies, Inc | Operating Segments | Alleghany Capital Corporation Segment
Debt Instrument [Line Items]
Senior Notes and other debt				$ 35,500
Concord | Operating Segments | Alleghany Capital Corporation Segment | Floating Rate Debt Funded by Alleghany Corporation
Debt Instrument [Line Items]
Senior Notes and other debt						$ 33,000