10-K

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UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the Fiscal Year Ended December 31, 2017

Commission File No. 1-13653 

AMERICAN FINANCIAL GROUP, INC.

Incorporated under the Laws of Ohio IRS Employer I.D. No. 31-1544320

301 East Fourth Street, Cincinnati, Ohio 45202

(513) 579-2121

Securities Registered Pursuant to Section 12(b) of the Act:
	Title of Each Class	Name of Each Exchange on Which Registered
	Common Stock	New York Stock Exchange
	6-1/4% Subordinated Debentures due September 30, 2054	New York Stock Exchange
	6% Subordinated Debentures due November 15, 2055	New York Stock Exchange

Securities Registered Pursuant to Section 12(g) of the Act: None

Indicate by check mark if the Registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes þ No ¨

Indicate by check mark if the Registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes ¨ No þ

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, and (2) has been subject to such filing requirements for the past 90 days. Yes þ No ¨

Indicate by check mark whether the Registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months. Yes þ No ¨

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of Registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. ¨

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

Large accelerated filer  þ                        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 þ

State the aggregate market value of the voting and non-voting common equity held by non-affiliates computed by reference to the price at which the common equity was last sold, or the average bid and asked price of such common equity, as of the last business day of the Registrant’s most recently completed second fiscal quarter: $7.64 billion.

Indicate the number of shares outstanding of each of the Registrant’s classes of common stock, as of the latest practicable date: 88,425,972 shares (excluding 14.9 million shares owned by subsidiaries) as of February 1, 2018.

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Documents Incorporated by Reference:

Proxy Statement for 2018 Annual Meeting of Stockholders (portions of which are incorporated by reference into Part III hereof).

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AMERICAN FINANCIAL GROUP, INC.

INDEX TO ANNUAL REPORT ON FORM 10-K

			Page
FORWARD-LOOKING STATEMENTS			1
Part I
Item 1	—	Business	2
Item 1A	—	Risk Factors	14
Item 1B	—	Unresolved Staff Comments	none
Item 2	—	Properties	21
Item 3	—	Legal Proceedings	21
Item 4	—	Mine Safety Disclosures	none
Part II
Item 5	—	Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	23
Item 6	—	Selected Financial Data	24
Item 7	—	Management’s Discussion and Analysis of Financial Condition and Results of Operations	26
Item 7A	—	Quantitative and Qualitative Disclosure About Market Risk	102
Item 8	—	Financial Statements and Supplementary Data	104
Item 9	—	Changes in and Disagreements With Accountants on Accounting and Financial Disclosure	none
Item 9A	—	Controls and Procedures	104
Item 9B	—	Other Information	none
Part III
Item 10	—	Directors, Executive Officers and Corporate Governance	S-1
Item 11	—	Executive Compensation	S-1
Item 12	—	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	S-1
Item 13	—	Certain Relationships and Related Transactions, and Director Independence	S-1
Item 14	—	Principal Accounting Fees and Services	S-1
Part IV
Item 15	—	Exhibits, Financial Statement Schedules	S-1

FORWARD-LOOKING STATEMENTS

The disclosures in this Form 10-K contain certain forward-looking statements that are subject to numerous assumptions, risks or uncertainties. The Private Securities Litigation Reform Act of 1995 provides a safe harbor for forward-looking statements. Some of the forward-looking statements can be identified by the use of words such as “anticipates”, “believes”, “expects”, “projects”, “estimates”, “intends”, “plans”, “seeks”, “could”, “may”, “should”, “will” or the negative version of those words or other comparable terminology. Such forward-looking statements include statements relating to: expectations concerning market and other conditions and their effect on future premiums, revenues, earnings, investment activities, and the amount and timing of share repurchases; recoverability of asset values; expected losses and the adequacy of reserves for asbestos, environmental pollution and mass tort claims; rate changes; and improved loss experience.

Actual results and/or financial condition could differ materially from those contained in or implied by such forward-looking statements for a variety of reasons including but not limited to the following and those discussed in Item 1A — Risk Factors.

• changes in financial, political and economic conditions, including changes in interest and inflation rates, currency fluctuations and extended economic recessions or expansions in the U.S. and/or abroad;

• performance of securities markets;

• new legislation or declines in credit quality or credit ratings that could have a material impact on the valuation of securities in AFG’s investment portfolio;

• the availability of capital;

• regulatory actions (including changes in statutory accounting rules);

• changes in the legal environment affecting AFG or its customers;

• tax law and accounting changes, including the impact of recent changes in U.S. corporate tax law;

• levels of natural catastrophes and severe weather, terrorist activities (including any nuclear, biological, chemical or radiological events), incidents of war or losses resulting from civil unrest and other major losses;

• development of insurance loss reserves and establishment of other reserves, particularly with respect to amounts associated with asbestos and environmental claims;

• availability of reinsurance and ability of reinsurers to pay their obligations;

• trends in persistency and mortality;

• competitive pressures;

• the ability to obtain adequate rates and policy terms;

• changes in AFG’s credit ratings or the financial strength ratings assigned by major ratings agencies to AFG’s operating subsidiaries; and

• the impact of the conditions in the international financial markets and the global economy (including those associated with the United Kingdom’s expected withdrawal from the European Union, or “Brexit”) relating to AFG’s international operations.

The forward-looking statements herein are made only as of the date of this report. The Company assumes no obligation to publicly update any forward-looking statements.

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PART I

ITEM 1

Business

Introduction

American Financial Group, Inc. (“AFG” or the “Company”) is a holding company that, through the operations of Great American Insurance Group, is engaged primarily in property and casualty insurance, focusing on specialized commercial products for businesses, and in the sale of fixed and fixed-indexed annuities in the retail, financial institutions and education markets. Its address is 301 East Fourth Street, Cincinnati, Ohio 45202; its phone number is (513) 579-2121. SEC filings, news releases, AFG’s Code of Ethics applicable to directors, officers and employees and other information may be accessed free of charge through AFG’s Internet site at: www.AFGinc.com. (Information on AFG’s Internet site is not part of this Form 10-K.)

See Note C — “Segments of Operations” to the financial statements for information on AFG’s assets, revenues and earnings before income taxes by segment.

Property and Casualty Insurance Segment

General

AFG’s property and casualty insurance operations provide a wide range of commercial coverages through over 30 niche insurance businesses that make up the Great American Insurance Group. AFG’s property and casualty insurance operations ultimately report to a single senior executive and operate under a business model that allows local decision-making for underwriting, claims and policy servicing in each of the niche operations. Each business is managed by experienced professionals in particular lines or customer groups and operates autonomously but with certain central controls and accountability. The decentralized approach allows each unit the autonomy necessary to respond to local and specialty market conditions while capitalizing on the efficiencies of centralized investment and administrative support functions. AFG’s property and casualty insurance operations employed approximately 6,700 people as of December 31, 2017. These operations are conducted through the subsidiaries listed in the following table, which includes independent financial strength ratings and 2017 gross written premiums (in millions) for each major subsidiary. These ratings are generally based on concerns for policyholders and agents and are not directed toward the protection of investors. AFG believes that maintaining a rating in the “A” category by A.M. Best is important to compete successfully in most lines of business.

	Ratings		Gross Written
	AM Best	S&P	Premiums
Company
Great American Insurance	A+	A+	$	4,243
National Interstate	A	not rated	746
Summit (Bridgefield Casualty and Bridgefield Employers)	A	A+	607
Republic Indemnity	A	A+	245
Neon Lloyd’s Syndicate	A	A+	295
American Empire Surplus Lines	A+	A+	133
Mid-Continent Casualty	A+	A+	131
Other			102
			$	6,502

The primary objectives of AFG’s property and casualty insurance operations are to achieve solid underwriting profitability and provide excellent service to its policyholders and agents. Underwriting profitability is measured by the combined ratio, which is a sum of the ratios of losses, loss adjustment expenses (“LAE”), underwriting expenses and policyholder dividends to premiums. A combined ratio under 100% indicates an underwriting profit. The combined ratio does not reflect investment income, other income or federal income taxes.

While many costs included in underwriting are readily determined (commissions, administrative expenses and many of the losses on claims reported), the process of determining overall underwriting results is highly dependent upon the use of estimates in the case of losses incurred or expected but not yet reported or developed. Actuarial procedures and projections are

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used to obtain “point estimates” of ultimate losses. While the process is imprecise and develops amounts which are subject to change over time, management believes that the liabilities for unpaid losses and loss adjustment expenses are adequate.

Financial information is reported in accordance with U.S. generally accepted accounting principles (“GAAP”) for shareholder and other investor-related purposes and reported on a statutory basis for U.S. insurance regulatory purposes. Unless indicated otherwise, the financial information presented in the Form 10-K for AFG’s property and casualty insurance operations is presented based on GAAP. Statutory information is only prepared for AFG’s U.S.-based subsidiaries, which represented approximately 94% of AFG’s direct written premiums in 2017, and is provided for industry comparisons or where comparable GAAP information is not readily available.

Major differences for statutory accounting include charging policy acquisition costs to expense as incurred rather than spreading the costs over the periods covered by the policies; reporting investment grade bonds and redeemable preferred stocks at amortized cost rather than fair value; netting of reinsurance recoverables and prepaid reinsurance premiums against the corresponding liabilities rather than reporting such items separately; and charging to surplus certain GAAP assets, such as furniture and fixtures and agents’ balances over 90 days old.

AFG’s statutory combined ratio averaged 92.0% for the period 2015 to 2017 as compared to 101.4% for the property and casualty industry over the same period (Source: “A.M. Best’s Review & Preview Report” — February 2018 Edition). AFG believes that its specialty niche focus, product line diversification and underwriting discipline have contributed to the Company’s ability to consistently outperform the industry’s underwriting results. Management’s philosophy is to refrain from writing business that is not expected to produce an underwriting profit even if it is necessary to limit premium growth to do so.

Property and Casualty Results

Performance measures such as underwriting profit or loss and related combined ratios are often used by property and casualty insurers to help users of their financial statements better understand the company’s performance. See Note C — “Segments of Operations” to the financial statements for the reconciliation of AFG’s earnings before income taxes by significant business segment to the statement of earnings.

The following table shows the performance of AFG’s property and casualty insurance operations (dollars in millions):

	2017			2016			2015
Gross written premiums	$	6,502		$	5,981		$	5,832
Ceded reinsurance	(1,751		)	(1,595		)	(1,505		)
Net written premiums	$	4,751		$	4,386		$	4,327
Net earned premiums	$	4,579		$	4,328		$	4,224
Loss and LAE	2,884			2,669			2,628
Special asbestos and environmental (“A&E”) charges	89			36			67
Neon exited lines charge	(18		)	65			—
Underwriting expenses	1,382			1,322			1,304
Underwriting gain	$	242		$	236		$	225
GAAP ratios:
Loss and LAE ratio	64.5		%	63.8		%	63.8		%
Underwriting expense ratio	30.2		%	30.7		%	30.9		%
Combined ratio	94.7		%	94.5		%	94.7		%
Statutory ratios:
Loss and LAE ratio	63.0		%	58.8		%	60.9		%
Underwriting expense ratio	30.1		%	31.4		%	31.7		%
Combined ratio	93.1		%	90.2		%	92.6		%
Industry statutory combined ratio (a)
All lines	105.1		%	100.9		%	98.3		%
Commercial lines	103.5		%	99.6		%	97.5		%

(a) The source of the industry ratios is “A.M. Best’s Review & Preview Report” (February 2018 Edition).

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As with other property and casualty insurers, AFG’s operating results can be adversely affected by unpredictable catastrophe losses. Certain natural disasters (hurricanes, severe storms, earthquakes, tornadoes, floods, etc.) and other incidents of major loss (explosions, civil disorder, terrorist events, fires, etc.) are classified as catastrophes by industry associations. Losses from these incidents are usually tracked separately from other business of insurers because of their sizable effects on overall operations. Total net losses to AFG’s insurance operations from current accident year catastrophes were $140 million in 2017, $55 million in 2016 and $35 million in 2015 and are included in the table above.

AFG generally seeks to reduce its exposure to catastrophes through individual risk selection, including minimizing coastal and known fault-line exposures, and the purchase of reinsurance. AFG’s net exposure to a catastrophic earthquake or windstorm that industry models indicate could occur once in every 500 years (a “500-year event”) is expected to be less than 4% of AFG’s Shareholders’ Equity.

Property and Casualty Insurance Products

AFG is focused on growth opportunities in what it believes to be more profitable specialty businesses where AFG personnel are experts in particular lines of business or customer groups. The following are examples of AFG’s specialty businesses:

Property and Transportation
Inland and Ocean Marine	Provides coverage primarily for builders’ risk, contractors’ equipment, property, motor truck cargo, marine cargo, boat dealers, marina operators/dealers and excursion vessels.
Agricultural-related	Provides federally reinsured multi-peril crop (allied lines) insurance covering most perils as well as crop-hail, equine mortality and other coverages for full-time operating farms/ranches and agribusiness operations on a nationwide basis.
Commercial Automobile	Provides coverage for vehicles (such as buses and trucks) in a broad range of businesses including the moving and storage and transportation industries, and a specialized physical damage product for the trucking industry.
Specialty Casualty
Executive and Professional Liability	Markets coverage for directors and officers of businesses and non-profit organizations; errors and omissions; cyber; and mergers and acquisitions.
Umbrella and Excess Liability	Provides liability coverage in excess of primary layers.
Excess and Surplus	Provides liability, umbrella and excess coverage for unique, volatile or hard to place risks, using rates and forms that generally do not have to be approved by state insurance regulators.
General Liability	Provides coverage for contractor-related businesses, energy development and production risks, and environmental liability risks.
Targeted Programs	Includes coverage (primarily liability and property) for social service agencies, leisure, entertainment and non-profit organizations, customized solutions for other targeted markets and alternative risk programs using agency captives.
Workers’ Compensation	Provides coverage for prescribed benefits payable to employees who are injured on the job.
Specialty Financial
Fidelity and Surety	Provides fidelity and crime coverage for government, mercantile and financial institutions and surety coverage for various types of contractors and public and private corporations.
Lease and Loan Services	Provides coverage for insurance risk management programs for lending and leasing institutions, including equipment leasing and collateral and lender-placed mortgage property insurance.

Management believes specialization is the key element to the underwriting success of these business units. These specialty businesses are opportunistic and their premium volume will vary based on prevailing market conditions. AFG continually evaluates expansion in existing markets and opportunities in new specialty markets that meet its profitability objectives. Likewise, AFG will withdraw from markets that do not meet its profit objectives or business strategy.

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Premium Distribution

The following table shows the net written premiums by sub-segment for AFG’s property and casualty insurance operations for 2017, 2016 and 2015 (in millions):

	2017		2016		2015
Property and transportation	$	1,765	$	1,672	$	1,636
Specialty casualty	2,280		2,036		2,052
Specialty financial	596		572		540
Other	110		106		99
	$	4,751	$	4,386	$	4,327

The geographic distribution of statutory direct written premiums by AFG’s U.S.-based insurers for 2017, 2016 and 2015 is shown below. Approximately 6% of AFG’s direct written premiums in 2017 were derived from non U.S.-based insurers, primarily Neon, a United Kingdom-based Lloyd’s insurer.

	2017		2016		2015			2017		2016		2015
California	13.2	%	14.3	%	14.2	%	New Jersey	2.6	%	2.5	%	2.3	%
Florida	10.0	%	9.6	%	9.0	%	Arizona	2.6	%	2.1	%	1.1	%
New York	6.6	%	6.7	%	6.7	%	Pennsylvania	2.4	%	2.5	%	2.6	%
Texas	6.2	%	6.1	%	6.1	%	Iowa	2.4	%	2.3	%	2.5	%
Illinois	5.6	%	5.3	%	5.7	%	Kansas	2.2	%	2.2	%	2.5	%
Georgia	3.2	%	2.9	%	2.8	%	North Carolina	2.1	%	2.4	%	2.7	%
Missouri	2.8	%	2.7	%	2.8	%	Other	38.1	%	38.4	%	39.0	%
								100.0	%	100.0	%	100.0	%

Reinsurance

Consistent with standard practice of most insurance companies, AFG reinsures a portion of its property and casualty business with other insurance companies and assumes a relatively small amount of business from other insurers. AFG uses reinsurance for two primary purposes: (i) to provide higher limits of coverage than it would otherwise be willing to provide (i.e. large line capacity) and (ii) to protect its business by reducing the impact of catastrophes. The availability and cost of reinsurance are subject to prevailing market conditions, which may affect the volume and profitability of business that is written. AFG is subject to credit risk with respect to its reinsurers, as the ceding of risk to reinsurers does not relieve AFG of its liability to its insureds until claims are fully settled.

Reinsurance is provided on one of two bases, facultative or treaty. Facultative reinsurance is generally provided on a risk-by-risk basis. Individual risks are ceded and assumed based on an offer and acceptance of risk by each party to the transaction. AFG purchases facultative reinsurance, both pro rata and excess of loss, depending on the risk and available reinsurance markets. Treaty reinsurance provides for risks meeting prescribed criteria to be automatically ceded and assumed according to contract provisions.

Catastrophe Reinsurance AFG has taken steps to limit its exposure to wind and earthquake losses through individual risk selection, including minimizing coastal and known fault-line exposures, and purchasing catastrophe reinsurance. Catastrophe reinsurance is purchased separately for AFG’s U.S. property and casualty insurance group and for Neon, AFG’s Lloyd’s insurance business. In addition, AFG purchases catastrophe reinsurance for its workers’ compensation businesses. Although the cost of catastrophe reinsurance varies depending on exposure and the level of worldwide loss activity, AFG continues to obtain reinsurance coverage in adequate amounts at acceptable rates.

In June 2017, AFG’s property and casualty insurance subsidiaries entered into a reinsurance agreement to obtain supplemental catastrophe protection through a catastrophe bond structure with Riverfront Re Ltd. (“Riverfront”). The reinsurance agreement provides supplemental reinsurance coverage up to 95% of $200 million (fully collateralized) for catastrophe losses in excess of $100 million (per occurrence and annual aggregate) occurring between June 1, 2017 and December 31, 2020. In connection with the reinsurance agreement, Riverfront issued notes to unrelated investors for the full amount of coverage provided under the reinsurance agreement. Riverfront is a variable interest entity in which AFG does not have a variable interest because the variability in Riverfront’s results will be absorbed entirely by the investors in Riverfront. Accordingly, Riverfront is not

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consolidated in AFG’s financial statements and the reinsurance agreement is accounted for as ceded reinsurance. AFG’s cost for this coverage is approximately $11 million per year.

In January 2018, Neon launched NCM Re (UK PCC) Ltd. (“NCM Re”), the first insurance-linked securities (“ILS”) vehicle in the United Kingdom (“UK”). NCM Re utilizes recently approved UK regulations to provide Neon with the ability to further enhance its global reinsurance offering to clients. NCM Re plans to use a range of catastrophe modeling and pricing techniques to make use of Neon’s underwriting and risk selection skills to source business for third-party ILS investors in the capital markets. In early 2018, NCM Re completed its first ILS transaction, which provides $72 million in collateralized quota share reinsurance that will assume 20% of the Neon Lloyd’s syndicate’s property treaty reinsurance and direct and facultative portfolios. Losses are recovered from NCM Re before Neon’s catastrophe excess of loss reinsurance coverage applies. In addition to NCM Re, Neon also placed a 35% quota share reinsurance treaty covering its property insurance (but not assumed reinsurance) lines.

Also in January 2018, AFG’s property and casualty insurance subsidiaries renewed their catastrophe reinsurance coverages. For AFG’s U.S. based operations, the Company continued to place $85 million of coverage in excess of a $15 million per event primary retention in the traditional reinsurance markets but as part of the placement, eliminated its 5% participation from previous treaty years. Neon placed $200 million of coverage in excess of a $15 million per event primary retention (extending to $225 million for U.S. risks only) with a 7.5% participation. For the catastrophe excess of loss reinsurance coverage, recoveries from NCM Re and Neon’s property insurance quota share apply before calculating losses recoverable from the catastrophe excess of loss reinsurance treaty. In addition to Neon’s catastrophe excess of loss reinsurance coverage, Neon has placed a quota share treaty which covers 12.5% of Neon’s gross property losses with a $400 million event limit (maximum $50 million recoverable) which supplements its catastrophe excess of loss reinsurance coverage and property quota share coverages up to the event limit.

The commercial marketplace requires large policy limits ($25 million or more) in several of AFG’s lines of business, including certain executive and professional liability, umbrella and excess liability, and fidelity and surety coverages. Since these limits exceed management’s desired exposure to an individual risk, AFG generally enters into reinsurance agreements to reduce its net exposure under such policies to an acceptable level. Reinsurance continues to be available for this large line capacity exposure with satisfactory pricing and terms.

In addition to the catastrophe and large line capacity reinsurance programs discussed above, AFG purchases reinsurance on a product-by-product basis. AFG regularly reviews the financial strength of its current and potential reinsurers. These reviews include consideration of credit ratings, available capital, claims paying history and expertise. This process periodically results in the transfer of risks to more financially secure reinsurers. Substantially all reinsurance is ceded to companies with investment grade S&P ratings or is secured by “funds withheld” or other collateral. Under “funds withheld” arrangements, AFG retains ceded premiums to fund ceded losses as they become due from the reinsurer. Recoverables from the following companies were individually between 5% and 10% of AFG’s total property and casualty reinsurance recoverable (including prepaid reinsurance premiums and net of payables to reinsurers) at December 31, 2017: Hannover Rueck SE, Munich Reinsurance America, Inc. and Swiss Reinsurance America Corporation. In addition, AFG has a reinsurance recoverable from Ohio Casualty Insurance Company of $156 million related to that company’s purchase of AFG’s commercial lines business in 1998. No other reinsurers exceeded 5% of AFG’s property and casualty reinsurance recoverable.

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The following table presents (by type of coverage) the amount of each loss above the specified retention covered by treaty reinsurance programs in AFG’s U.S.-based property and casualty insurance operations (in millions) as of January 1, 2018:

			Reinsurance Coverage						AFG
	Primary		Coverage		AFG Participation (a)				Maximum
	Retention		Amount		%		$		Loss (b)
U.S.-based operations:
California Workers’ Compensation	$	2	$	148	1	%	$	1	$	3
Other Workers’ Compensation	3		37		—	%	—		3
Commercial Umbrella	1		49		14	%	7		8
Property — General	5		45		—	%	—		5
Property — Catastrophe	15		85		—	%	—		15
Neon Lloyd’s Syndicate
Property — Catastrophe (c)	15		200		7.5	%	—		15
Riverfront Re Ltd. catastrophe bond (d)	100		200		5	%	10		N/A

(a) Includes the participation of AFG’s internal reinsurance program.

(b) Maximum loss per event for claims up to reinsurance coverage limit.

(c) Coverage amount extends to $225 million for U.S. catastrophe events. The combination of Neon’s excess of loss catastrophe reinsurance and 12.5% gross property loss treaty (discussed above) limits the maximum retained loss per event to $15 million until such coverage is exhausted.

(d) Includes aggregate coverage. See description above.

In addition to the coverage shown above, AFG reinsures a portion of its crop insurance business through the Federal Crop Insurance Corporation (“FCIC”). The FCIC offers both proportional (or “quota share”) and non-proportional coverages. The proportional coverage provides that a fixed percentage of risk is assumed by the FCIC. The non-proportional coverage allows AFG to select desired retention of risk on a state-by-state, county, crop or plan basis. AFG typically reinsures 15% to 25% of gross written premiums with the FCIC. AFG also purchases quota share reinsurance in the private market. This quota share provides for a ceding commission to AFG and a profit sharing provision. During both 2017 and 2016, AFG reinsured 52.5% of premiums not reinsured by the FCIC in the private market and purchased stop loss protection coverage for the remaining portion of the business. In 2018, AFG expects to reinsure 50% of the premiums not reinsured by the FCIC in the private market.

The balance sheet caption “recoverables from reinsurers” included approximately $100 million on paid losses and LAE and $2.96 billion on unpaid losses and LAE at December 31, 2017. These amounts are net of allowances of approximately $20 million for doubtful collection of reinsurance recoverables. The collectibility of a reinsurance balance is based upon the financial condition of a reinsurer as well as individual claim considerations.

Reinsurance premiums ceded and assumed are presented in the following table (in millions):

	2017		2016		2015
Reinsurance ceded	$	1,751	$	1,595	$	1,505
Reinsurance ceded, excluding crop	1,076		985		899
Reinsurance assumed — including involuntary pools and associations	192		123		119

Loss and Loss Adjustment Expense Reserves

The consolidated financial statements include the estimated liability for unpaid losses and LAE of AFG’s insurance subsidiaries. This liability represents estimates of the ultimate net cost of all unpaid losses and LAE and is determined by using case-basis evaluations, actuarial projections and management’s judgment. These estimates are subject to the effects of changes in claim amounts and frequency and are periodically reviewed and adjusted as additional information becomes known. In accordance with industry practices, such adjustments are reflected in current year operations. Generally, reserves for reinsurance assumed and involuntary pools and associations are reflected in AFG’s results at the amounts reported by those entities. See Note O — “Insurance — Property and Casualty Insurance Reserves” to the financial statements for information on the development of AFG’s liability for unpaid losses and loss adjustment expenses by accident year as well as a progression of the liability on a GAAP basis over the past three years.

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The differences between the liability for losses and LAE reported in the annual statements filed with the state insurance departments in accordance with statutory accounting principles (“SAP”) and that reported in the accompanying consolidated financial statements in accordance with GAAP at December 31, 2017 are as follows (in millions):

Liability reported on a SAP basis, net of $152 million of retroactive reinsurance	$	5,931
Reinsurance recoverables, net of allowance	2,957
Other, including reserves of foreign insurers	790
Liability reported on a GAAP basis	$	9,678

Asbestos and Environmental (“A&E”) Reserves   AFG’s property and casualty group, like many others in the industry, has A&E claims arising in most cases from general liability policies written more than thirty years ago. The establishment of reserves for such A&E claims presents unique and difficult challenges and is subject to uncertainties significantly greater than those presented by other types of claims. For a discussion of these uncertainties, see Item 7— Management’s Discussion and Analysis— “Uncertainties — Asbestos and Environmental-related (“A&E”) Insurance Reserves” and Note M— “Contingencies” to the financial statements.

Management has periodically conducted comprehensive external studies of its asbestos and environmental reserves with the aid of specialty actuarial, engineering and consulting firms and outside counsel, generally every two years, with an in-depth internal review during the intervening years. Charges resulting from these studies and reviews are included in “Incurred losses and LAE” in the table below. As a result of the 2017 comprehensive external study, AFG recorded an $89 million pretax special charge in the third quarter of 2017 to increase the property and casualty group’s asbestos reserves by $53 million (net of reinsurance) and its environmental reserves by $36 million (net of reinsurance). Over the past few years, the focus of AFG’s asbestos claims litigation has shifted to smaller companies and companies with ancillary exposures. AFG’s insureds with these exposures have been the driver of the property and casualty segment’s asbestos reserve increases in recent years. AFG is seeing modestly increasing estimates for indemnity and defense compared to prior studies. Overall, the rate of new asbestos cases received is down modestly however, increasing life expectancies in the U.S. have allowed more time for the impacts of asbestos exposure to emerge. AFG’s comprehensive external study incorporated, among other factors, the increase in projected industry ultimate losses attributable to asbestos exposures, as well as revised estimates for future claims emergence, which resulted in an increase in AFG’s provision for future asbestos claims. The increase in property and casualty environmental reserves in 2017 (as well as in 2016, discussed below) was primarily associated with updated estimates of site investigation costs with respect to existing sites and newly identified sites. AFG is seeing increased legal defense costs in environmental claims generally, as well as a number of claims and sites where the estimated investigation and remediation costs have increased. Certain individual claims are taking a longer time to settle than originally estimated, causing AFG to increase its reserves to reflect related increased costs. As in past years, there were no new or emerging broad industry trends that were identified in this study. As a result of the 2016 internal review, AFG recorded a $36 million pretax special charge in the third quarter of 2016 to increase the property and casualty group’s asbestos reserves by $5 million (net of reinsurance) and its environmental reserves by $31 million (net of reinsurance). As a result of the 2015 comprehensive external study, AFG recorded a $67 million pretax special charge in the third quarter of 2015 to increase the property and casualty group’s asbestos reserves by $25 million (net of reinsurance) and its environmental reserves by $42 million (net of reinsurance). The increase in property and casualty environmental reserves in 2015 was attributed primarily to AFG’s increased defense costs and a number of claims where the estimated costs of remediation have increased.

The following table (in millions) is a progression of the property and casualty group’s A&E reserves.

	2017			2016			2015
Reserves at beginning of year	$	337		$	327		$	289
Incurred losses and LAE	89			36			67
Paid losses and LAE	(23		)	(26		)	(29		)
Reserves at end of year, net of reinsurance recoverable	403			337			327
Reinsurance recoverable, net of allowance	125			106			99
Gross reserves at end of year	$	528		$	443		$	426

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Marketing

The property and casualty insurance group directs its sales efforts primarily through independent insurance agents and brokers, although small portions are written through employee agents. Independent agents and brokers generally receive a commission on the sale of each policy. Some agents and brokers are eligible for a bonus commission based on the overall profitability of policies placed with AFG by the broker or agent in a particular year. The property and casualty insurance group writes insurance through several thousand agents and brokers.

Competition

AFG’s property and casualty insurance businesses compete with other individual insurers, state funds and insurance groups of varying sizes, some of which are mutual insurance companies possessing competitive advantages in that all their profits inure to their policyholders. See Item 1A — Risk Factors. They also compete with self-insurance plans, captive programs and risk retention groups. Due to the specialty nature of these coverages, competition is based primarily on service to policyholders and agents, specific characteristics of products offered and reputation for claims handling. Financial strength ratings, price, commissions and profit sharing terms are also important factors. Management believes that sophisticated data analysis for refinement of risk profiles, extensive specialized knowledge and loss prevention service have helped AFG compete successfully.

Annuity Segment

General

AFG sells traditional fixed and fixed-indexed annuities in the retail, financial institutions and education markets through independent producers and through direct relationships with certain financial institutions. The annuity operations employed approximately 600 people at December 31, 2017. These operations are conducted primarily through the subsidiaries listed in the following table, which includes 2017 statutory annuity premiums (in millions), annuity policies in force and independent ratings.

			Annuity
	Annuity		Policies	Ratings
Company	Premiums		In Force	AM Best	S&P
Great American Life Insurance Company	$	4,130	402,000	A	A+
Annuity Investors Life Insurance Company	211		114,000	A	A+

AFG believes that the ratings assigned by independent insurance rating agencies are an important competitive factor because agents, potential policyholders and financial institutions often use a company’s rating as an initial screening device in considering annuity products. AFG believes that a rating in the “A” category by at least one rating agency is necessary to successfully compete in its primary annuity markets.

Statutory premiums of AFG’s annuity operations for the last three years were as follows (in millions):

	Premiums
	2017		2016		2015
Financial institutions single premium annuities — indexed	$	1,711	$	1,950	$	1,741
Financial institutions single premium annuities — fixed	622		468		229
Retail single premium annuities — indexed	1,723		1,714		1,864
Retail single premium annuities — fixed	83		82		70
Education market — fixed and indexed annuities	174		184		194
Total fixed annuity premiums	4,313		4,398		4,098
Variable annuities	28		37		42
Total annuity premiums	$	4,341	$	4,435	$	4,140

Annuities are long-term retirement saving instruments that benefit from income accruing on a tax-deferred basis. The issuer of the annuity collects premiums, credits interest or earnings on the policy and pays out a benefit upon death, surrender or annuitization. Single premium annuities are generally issued in exchange for a one-time lump-sum premium payment. Certain annuities, primarily in the education market, have premium payments that are flexible in both amount and timing as determined by the policyholder and are generally made through payroll deductions.

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Annuity contracts are generally classified as either fixed rate (including fixed-indexed) or variable. With a traditional fixed rate annuity, AFG seeks to maintain a desired spread between the yield on its investment portfolio and the rate it credits to policyholders. AFG accomplishes this by: (i) offering crediting rates that it has the option to change after any initial guarantee period (subject to minimum interest rate and other contractual guarantees); (ii) designing annuity products that encourage persistency; and (iii) maintaining an appropriate matching of assets and liabilities.

A fixed-indexed annuity provides policyholders with the opportunity to receive a crediting rate tied, in part, to the performance of an existing market index (generally the S&P 500) while protecting against the related downside risk through a guarantee of principal (excluding surrender charges, market value adjustments, and certain benefit charges). AFG purchases call options designed to substantially offset the effect of the index participation in the liabilities associated with fixed-indexed annuities.

As an accommodation in its education market, AFG offers a limited amount of variable annuities. With a variable annuity, the earnings credited to the policy vary based on the investment results of the underlying investment options chosen by the policyholder, generally without any guarantee of principal except in the case of death of the insured. Premiums directed to the underlying investment options maintained in separate accounts are invested in funds managed by various independent investment managers. AFG earns a fee on amounts deposited into separate accounts. Subject to contractual provisions, policyholders may also choose to direct all or a portion of their premiums to various fixed-rate options, in which case AFG earns a spread on amounts deposited.

The profitability of a fixed annuity business is largely dependent on the ability of a company to earn income on the assets supporting the business in excess of the amounts credited to policyholder accounts plus expenses incurred (earning a “spread”). Performance measures such as net spread earned are often presented by annuity businesses to help users of their financial statements better understand the company’s performance. The following table shows the earnings before income taxes, as well as the net spread earned on fixed annuities, for the annuity segment both before and after the impact of fair value accounting for derivatives related to fixed-indexed annuities (“FIAs”) (dollars in millions):

	Year ended December 31,
	2017			2016			2015
Annuity earnings before income taxes — before the impact of derivatives related to FIAs	$	413		$	395		$	354
Impact of derivatives related to FIAs (a)	(33		)	(27		)	(23		)
Annuity segment earnings before income taxes	$	380		$	368		$	331
Net spread earned on fixed annuities — before impact of derivatives related to FIAs	1.33		%	1.39		%	1.35		%
Impact of derivatives related to FIAs	(0.10		%)	(0.10		%)	(0.09		%)
Net spread earned on fixed annuities	1.23		%	1.29		%	1.26		%

(a) FIAs provide policyholders with a crediting rate tied, in part, to the performance of an existing stock market or other financial index. AFG attempts to mitigate the risk in the index-based component of these products through the purchase of call options on the appropriate index. AFG’s strategy is designed so that the change in the fair value of the call option assets will generally offset the economic change in the liabilities from the index participation. Both the index-based component of the annuities (fair value of $2.54 billion at December 31, 2017) and the related call options (fair value of $701 million at December 31, 2017) are considered derivatives that must be marked-to-market through earnings each period. Fluctuations in interest rates and the stock market, among other factors, can cause volatility in the periodic measurement of fair value of the embedded derivative that management believes can be inconsistent with the long-term economics of these products.

Marketing

AFG sells its single premium annuities, excluding financial institution production (discussed below), primarily through a retail network of approximately 65 national marketing organizations (“NMOs”) and managing general agents (“MGAs”) who, in turn, direct nearly 1,100 actively producing agents.

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AFG also sells single premium annuities in financial institutions through direct relationships with certain financial institutions and through independent agents and brokers. The table below highlights the percentage of AFG’s total annuity premiums generated through its top five financial institution relationships (ranked based on 2017 statutory premiums):

	2017		2016
The PNC Financial Services Group, Inc.	9.1	%	9.7	%
Wells Fargo & Company	8.1	%	14.2	%
Regions Financial Corporation	6.5	%	4.8	%
LPL Financial	5.5	%	4.8	%
BB&T Corporation	5.5	%	4.5	%

In the education market, schools may allow employees to save for retirement through contributions made on a before-tax basis. Federal income taxes are not payable on pretax contributions or earnings until amounts are withdrawn. AFG sells its education market annuities directly through writing agents rather than through NMOs and MGAs.

AFG is licensed to sell its fixed annuity products in all states except New York; it is licensed to sell its variable products in all states except New York and Vermont. At December 31, 2017, AFG had approximately 515,000 annuity policies in force. The states that accounted for 5% or more of AFG’s statutory annuity premiums in 2017 and the comparable preceding years are shown below:

	2017		2016		2015
California	10.0	%	9.8	%	9.7	%
Florida	7.3	%	8.5	%	9.0	%
Pennsylvania	6.1	%	7.2	%	7.2	%
Ohio	5.4	%	5.2	%	5.7	%
Texas	5.1	%	4.6	%	4.3	%

Competition

AFG’s annuity businesses operate in highly competitive markets. They compete with other insurers and financial institutions based on many factors, including: (i) ratings; (ii) financial strength; (iii) reputation; (iv) service to policyholders and agents; (v) product design (including interest rates credited, bonus features and index participation); and (vi) commissions. Since most policies are marketed and distributed through independent agents, the insurance companies must also compete for agents.

No single insurer dominates the markets in which AFG’s annuity businesses compete. See Item 1A — Risk Factors. Competitors include (i) individual insurers and insurance groups, (ii) mutual funds and (iii) other financial institutions. In a broader sense, AFG’s annuity businesses compete for retirement savings with a variety of financial institutions offering a full range of financial services. In the financial institution annuity market, AFG’s annuities compete directly against competitors’ annuities, certificates of deposit and other investment alternatives at the point of sale. In addition, over the last few years, several offshore and/or hedge fund companies have made significant acquisitions of annuity businesses, resulting in annuity groups that are larger in size than AFG’s annuity business.

Sales of annuities, including renewal premiums, are affected by many factors, including: (i) competitive annuity products and rates; (ii) the general level and volatility of interest rates, including the slope of the yield curve; (iii) the favorable tax treatment of annuities; (iv) commissions paid to agents; (v) services offered; (vi) ratings from independent insurance rating agencies; (vii) other alternative investments; (viii) performance and volatility of the equity markets; (ix) media coverage of annuities; (x) regulatory developments regarding suitability and the sales process; and (xi) general economic conditions.

Run-off Long-term Care and Life Segment

AFG ceased new sales of long-term care insurance in January 2010 and sold substantially all of its run-off long-term care business in December 2015. See Note B — “Acquisitions and Sale of Businesses” to the financial statements. Renewal premiums on the remaining policies covering approximately 1,600 lives will be accepted unless those policies lapse. At December 31, 2017, AFG’s long-term care insurance reserves were $39 million, net of reinsurance recoverables and excluding the impact of unrealized gains on securities.

11

Although AFG no longer actively markets new life insurance products, it continues to service and receive renewal premiums on its in-force block of approximately 105,000 policies and $12.05 billion gross ($3.73 billion net of reinsurance) of life insurance in force at December 31, 2017. Renewal premiums, net of reinsurance, were $17 million in 2017, $18 million in 2016 and $28 million in 2015. At December 31, 2017, AFG’s life insurance reserves were $309 million, net of reinsurance recoverables.

Other Operations

Through subsidiaries, AFG is engaged in a variety of other operations, including commercial real estate operations in Cincinnati (office buildings), Whitefield, New Hampshire (Mountain View Grand Resort), Chesapeake Bay (Skipjack Cove Yachting Resort and Bay Bridge Marina), Charleston (Charleston Harbor Resort and Marina) and Palm Beach (Sailfish Marina and Resort). These operations employed approximately 300 full-time employees at December 31, 2017.

Investment Portfolio

General

A summary of AFG’s fixed maturities and equity securities is shown in Note E to the financial statements. For additional information on AFG’s investments, see Item 7 — Management’s Discussion and Analysis — “Investments.” Portfolio yields are shown below:

	2017		2016		2015
Yield on Fixed Maturities (a):
Excluding realized gains and losses	4.4	%	4.5	%	4.7	%
Including realized gains and losses	4.4	%	4.5	%	4.6	%
Yield on Equity Securities (includes perpetual preferred stocks) (a):
Excluding realized gains and losses	5.7	%	5.3	%	5.4	%
Including realized gains and losses	6.1	%	6.2	%	5.4	%

(a) Based on amortized cost; excludes effects of changes in unrealized gains and losses. Realized losses include impairment charges.

The table below compares total returns, which include changes in fair value, on AFG’s fixed maturities and equity securities to comparable public indices. While there are no directly comparable indices to AFG’s portfolio, the two shown below are widely used benchmarks in the financial services industry.

	2017		2016		2015
Total return on AFG’s fixed maturities	5.9	%	4.7	%	1.5	%
Barclays Capital U.S. Universal Bond Index	4.1	%	3.9	%	0.4	%
Total return on AFG’s equity securities (includes perpetual preferred stocks)	13.7	%	10.3	%	(3.4	%)
Standard & Poor’s 500 Index	21.8	%	12.0	%	1.4	%

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Fixed Maturity Investments

AFG’s bond portfolio is invested primarily in taxable bonds. The following table shows AFG’s available for sale fixed maturity investments by Standard & Poor’s Corporation or comparable rating as of December 31, 2017 (dollars in millions).

	Amortized		Fair Value
	Cost		Amount		%
S&P or comparable rating
AAA, AA, A	$	23,259	$	23,920	63	%
BBB	10,104		10,455		27	%
Total investment grade	33,363		34,375		90	%
BB	716		730		2	%
B	321		326		1	%
CCC, CC, C	797		935		2	%
D	458		521		1	%
Total non-investment grade	2,292		2,512		6	%
Not rated	1,383		1,492		4	%
Total	$	37,038	$	38,379	100	%

The National Association of Insurance Commissioners (“NAIC”) has retained third-party investment management firms to assist in the determination of appropriate NAIC designations for mortgage-backed securities (“MBS”) based not only on the probability of loss (which is the primary basis of ratings by the major ratings firms), but also on the severity of loss and statutory carrying value. Approximately 11% of AFG’s fixed maturity investments are MBS. At December 31, 2017, 98% (based on statutory carrying value of $37.01 billion) of AFG’s fixed maturity investments held by its insurance companies had a NAIC designation of 1 or 2 (the highest of the six designations).

Equity Investments

At December 31, 2017, AFG held common and perpetual preferred stocks classified as available for sale with a fair value of $1.60 billion.

Regulation

AFG’s insurance company subsidiaries are subject to regulation in the jurisdictions where they do business. In general, the insurance laws of the various states establish regulatory agencies with broad administrative powers governing, among other things, premium rates, solvency standards, licensing of insurers, agents and brokers, trade practices, forms of policies, maintenance of specified reserves and capital for the protection of policyholders, deposits of securities for the benefit of policyholders, investment activities and relationships between insurance subsidiaries and their parents and affiliates. Material transactions between insurance subsidiaries and their parents and affiliates generally must receive prior approval of the applicable insurance regulatory authorities and be disclosed. In addition, while differing from state to state, these regulations typically restrict the maximum amount of dividends that may be paid by an insurer to its shareholders in any twelve-month period without advance regulatory approval. Such limitations are generally based on net earnings or statutory surplus. Under applicable restrictions, the maximum amount of dividends available to AFG in 2018 from its insurance subsidiaries without seeking regulatory approval is approximately $826 million.

The Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010 (“Dodd-Frank Act”), among other things, established a Federal Insurance Office (“FIO”) within the U.S. Treasury. Under this law, regulations will need to be created for the FIO to carry out its mandate to focus on systemic risk oversight. Since its formation, the FIO has worked with the NAIC and other stakeholders to explore a hybrid approach to regulation of the insurance industry; however, the state-based system of regulation has largely been retained. AFG cannot predict the future role of the FIO and its role in regulation of the insurance industry and how that might ultimately affect AFG’s operations.

Neon, AFG’s UK-based Lloyd’s insurer, is subject to regulation by the European Union’s executive body, the European Commission. On January 1, 2016, Neon adopted new capital adequacy and risk management regulations known as Solvency II. Because Lloyd’s insurers were already operating under the proposed Solvency II guidelines, implementation was not material to AFG.

Most states have created insurance guaranty associations that assess solvent insurers to pay claims of insurance companies that become insolvent. Annual guaranty assessments for AFG’s insurance companies have not been material.

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Disclosure of Certain Activities Under Section 13(r) of the Securities Exchange Act of 1934

Section 13(r) of the Securities Exchange Act of 1934, as amended (“Section 13(r)”), requires a registrant to disclose in its annual or quarterly reports whether it or an affiliate knowingly engaged in certain activities, transactions or dealings related to Iran during the period covered by the report. Many of the activities, transactions and dealings that are required to be reported under Section 13(r) were previously subject to U.S. sanctions or prohibited by applicable local law. On January 16, 2016, the United States and the European Union eased sanctions against Iran pursuant to the Joint Comprehensive Plan of Action, and many of the reportable activities, transactions and dealings under Section 13(r) are no longer subject to U.S. sanctions and no longer prohibited by applicable local law.

Certain of the Company’s subsidiaries located outside the United States subscribe to insurance policies that provide insurance coverage to vessels owned by international shipping and marine entities with vessels that travel worldwide. As a result, the insurance policies may be called upon to respond to claims involving or that have exposure to Iranian petroleum resources, refined petroleum, and petrochemical industries. For example, certain of the Company’s non-U.S. subsidiaries participate in global marine hull and war policies that provide coverage for damage to vessels navigating into and out of ports worldwide, which could include Iran.

For the year ended December 31, 2017, the Company is not aware of any additional premium with respect to underwriting insurance or reinsurance activities reportable under Section 13(r). Should any such risks have entered into the stream of commerce covered by these insurance or reinsurance activities, the Company believes that the premiums associated with such business would be immaterial.

ITEM 1A

Risk Factors

In addition to the other information set forth in this report, particularly information under “Forward-Looking Statements” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” the following factors could materially affect AFG’s business, financial condition, cash flows or future results. Any one of these factors could cause AFG’s actual results to vary materially from recent results or from anticipated future results. The risks described below are not the only risks facing AFG. Additional risks and uncertainties not currently known to management or that management currently deems to be immaterial also may materially adversely affect AFG’s business, financial condition and/or operating results.

Adverse developments in the financial markets and deterioration in global economic conditions could have a material adverse effect on AFG’s results of operations and financial condition.

Worldwide financial markets have, from time to time, experienced significant and unpredictable disruption. For example, during the financial crisis that started approximately ten years ago, the United States and many other economies experienced a prolonged economic downturn, resulting in heightened credit risk, reduced valuation of certain investments and decreased economic activity. Financial markets may again experience significant and prolonged disruption, including disruption from unanticipated events. In the years following the financial crisis, the federal government has taken steps to stabilize financial markets, but such steps may not be effective.

Changes in financial markets including fluctuations in interest rates, credit conditions, equity prices and many other factors that are unpredictable and beyond AFG’s control can adversely affect the value of investments and the realization of investment income.

A significant majority of AFG’s investment portfolio consists of fixed maturity investments, and changes in global economic conditions, including interest rates, could have a material adverse effect on AFG’s results of operations and financial condition.

As of December 31, 2017, approximately 84% of AFG’s investment portfolio holdings consisted of fixed maturity investments that are sensitive to changes in interest rates. A decline in interest rates may reduce the returns earned on new and floating-rate fixed maturity investments, thereby reducing AFG’s net investment income, while an increase in interest rates may reduce the value of AFG’s existing fixed maturity investments, which primarily have fixed interest rates. The value of AFG’s fixed maturity investments is also subject to risk that certain investments may default or become impaired due to deterioration in the financial condition of issuers of those investments. If a decline in the fair value of a specific investment (below its amortized cost) is considered to be other-than-temporary, a provision for impairment would be charged to earnings.

14

Interest rates have remained at historical lows for an extended period. In addition, central banks in some countries have recently pursued largely unprecedented negative interest rate policies, the consequences of which are uncertain. The continuation of the current low interest rate environment or a deflationary environment with negative interest rates could affect business behavior in ways that are adverse to AFG and could constrict AFG’s net investment income.

As of December 31, 2017, mortgage-backed securities constituted approximately 11% of AFG’s fixed maturity portfolio. In addition to the risks applicable to the entire fixed maturity investment portfolio, changes in interest rates can expose AFG to prepayment risks on mortgage-backed securities. In periods of declining interest rates, mortgage prepayments generally increase and mortgage-backed securities are paid down more quickly, requiring AFG to reinvest the proceeds at the then current market rates, which may be lower than on the securities repaid.

Changes in interest rates could adversely affect the profitability of AFG’s annuity business.

The profitability of AFG’s annuity segment is largely dependent on the spread between what it earns on its investments and the crediting rate it pays on its annuity contracts plus expenses incurred.

Both rising and declining interest rates can negatively affect the Company’s annuity results. Most of AFG’s annuity products have guaranteed minimum crediting rates. Although AFG could reduce the average crediting rate on a substantial portion of its traditional fixed and fixed-indexed deferred annuities during periods of low or falling interest rates, AFG may not be able to fully offset the decline in investment earnings with lower crediting rates.

During periods of rising interest rates, the Company may experience competitive pressure to increase crediting rates to avoid a decline in sales or increased surrenders, thus resulting in lower spreads. In addition, an increase in surrenders could require the sale of investments at a time when the prices of those assets are lower due to the increase in market rates, which may result in realized investment losses.

Intense competition could adversely affect AFG’s results of operations.

The property and casualty insurance segment operates in a highly competitive industry that is affected by many factors that can cause significant fluctuations in its results of operations. The lines of business in this segment compete with other individual insurers, state funds and insurance groups of varying sizes, some of which are mutual insurance companies possessing competitive advantages in that all their profits inure to their policyholders. In addition, certain foreign insurers may be taxed at lower rates, which may result in a competitive advantage over AFG. The property and casualty insurance segment also competes with self-insurance plans, captive programs and risk retention groups. Competition is based on many factors, including service to policyholders and agents, product design, reputation for claims handling, price, commissions, ratings and financial strength. Peer companies and competitors in some or all of AFG’s specialty lines include the following companies and/or their subsidiaries: Alleghany Corp., American International Group Inc., American National Insurance Company, AmTrust Financial Services, Inc., Arch Capital Group Ltd., Baldwin & Lyons, Inc., Chubb Ltd., Cincinnati Financial Corp., CNA Financial Corp., Fairfax Financial Holdings Ltd. (Zenith National), The Hartford Financial Services Group, Inc., Lancer Insurance Company, Liberty Mutual, Markel Corp., Munich Re Group (American Modern Insurance), RLI Corp., The Travelers Companies, Inc., Tokio Marine Holdings, Inc. (HCC Insurance, Philadelphia Consolidated), W.R. Berkley Corp., XL Group Ltd. and Zurich Insurance Group Ltd.

AFG’s annuity segment competes with individual insurers and insurance groups, mutual funds and other financial institutions. In addition, in recent years, offshore and/or hedge fund companies have made significant acquisitions of annuity businesses. Competition is based on numerous factors including reputation, product design, interest crediting rates, performance, scope of distribution, price and perceived financial strength and credit ratings. Peer companies and competitors for AFG’s annuity segment include the following companies and/or their subsidiaries: Allianz Life Insurance Company of North America, American Equity Investment Life Holding Company (Eagle Life Insurance Company), American International Group Inc., Athene Holding Ltd, Global Atlantic Financial Group Ltd. (Forethought Life Insurance Company), Lincoln National Corp., MetLife, Inc., Nationwide Mutual Insurance Company, Pacific Life Insurance Company, Sumitomo Life Insurance Company (Symetra Financial Corp.) and Voya Financial, Inc.

Some of AFG’s competitors have more capital and greater resources than AFG, and may offer a broader range of products and lower prices than AFG offers. If competition limits AFG’s ability to write new or renewal business at adequate rates, its results of operations will be adversely affected.

15

A significant percentage of AFG’s sales of annuity products through financial institutions is concentrated in a small number of institutions.

Annuity premiums generated through financial institutions represented 54% of AFG’s annuity premiums in 2017 and have been a key driver in the growth of AFG’s annuity business. In 2017, two large financial institutions accounted for 32% of AFG’s total sales through financial institutions and 17% of AFG’s overall annuity sales. In the financial institutions annuity market, AFG competes directly against competitors’ annuities, certificates of deposit and other investment alternatives at the point of sale. Loss of a substantial portion of this business coupled with a failure to replace these financial institutions if they significantly reduce sales of AFG annuities could reduce AFG’s future growth.

AFG’s revenues could be adversely affected if it is not able to attract and retain independent agents.

AFG’s reliance on the independent agency market makes it vulnerable to a reduction in the amount of business written by agents. Many of AFG’s competitors also rely significantly on the independent agency market. Accordingly, AFG must compete with other insurance carriers for independent agents’ business. Some of its competitors offer a wider variety of products, lower price for insurance coverage or higher commissions. A reduction in the number of independent agencies marketing AFG’s products, the failure of agencies to successfully market AFG’s products, changes in the strategy or operations of agencies (including agency consolidation) or the choice of agencies to reduce their writings of AFG products could adversely affect AFG’s revenues and profitability.

The inability to obtain reinsurance or to collect on ceded reinsurance could adversely affect AFG’s results of operations.

AFG purchases reinsurance to limit the amount of risk it retains. Market conditions determine the availability and cost of the reinsurance protection AFG purchases, which affects the level of AFG’s business and profitability, as well as the level and types of risk AFG retains. If AFG is unable to obtain sufficient reinsurance at a cost AFG deems acceptable, AFG may opt to reduce the volume of its underwriting. AFG is also subject to credit risk with respect to its reinsurers, as AFG will remain liable to its insureds regardless of whether a reinsurer is able to meet its obligations under agreements covering the reinsurance ceded. The collectability of recoverables from reinsurers is subject to uncertainty arising from a number of factors, including a reinsurers’ financial capacity and willingness to make payments under the terms of a reinsurance treaty or contract and changes in market conditions. As of December 31, 2017, recoverables from reinsurances reported on AFG’s Balance Sheet were approximately $3.37 billion.

AFG is subject to comprehensive regulation, and its ability to earn profits may be restricted by these regulations.

AFG is subject to comprehensive regulation by government agencies in the states and countries where its insurance company subsidiaries are domiciled and where these subsidiaries issue policies and handle claims. In addition, the Lloyd’s marketplace sets rules under which its members operate, including Neon (AFG’s Lloyd’s syndicate). Most insurance regulations are designed to protect the interests of AFG’s policyholders and third party claimants as opposed to its investors.

The Dodd-Frank Act, enacted in June 2010, mandates changes to the regulation of the financial services industry. Implementation of the Dodd-Frank Act is ongoing. The potential impacts of the Act on the U.S. insurance industry are not clear, but may affect AFG’s operations and governance in ways that could adversely affect AFG’s financial condition and results of operations.

Changes in domestic or foreign tax laws or interpretations of such laws could increase AFG’s corporate taxes and reduce earnings. On December 22, 2017, the U.S. enacted The Tax Cuts and Jobs Act of 2017 (“TCJA”), which significantly reforms the U.S. tax code. AFG’s deferred tax assets and liabilities have been revalued as of December 31, 2017 to reflect the newly enacted corporate tax rate. The U.S. Treasury and the Internal Revenue Service are expected to issue implementation guidance for the TCJA in 2018. Clarifications and interpretations of the TCJA may adversely affect our expected effective tax rate and the realization of deferred taxes.

As a participant in the federal crop insurance program, AFG could also be impacted by regulatory and legislative changes affecting that program. For example, the reinsurance levels that the federal government provides to authorized carriers could be reduced by future legislation. AFG will continue to monitor new and changing federal regulations and their potential impact, if any, on its insurance company subsidiaries.

On April 6, 2016, the U.S. Department of Labor (“DOL”) released a final regulation that substantially expands the range of activities that will be considered fiduciary advice under the Employee Retirement Income Security Act of 1974 and the Internal Revenue Code of 1986. The regulation’s scheduled effective date was April 10, 2017. This regulation deems advisers, including

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insurance agents, who sell annuities to IRAs, IRA rollovers or 401(k) plans to be fiduciaries and prohibits them from receiving compensation unless they comply with a prohibited transaction exemption requiring, among other things, advisers to comply with impartial conduct standards of acting in the customer’s best interest, making no misleading statements and receiving reasonable compensation. On February 3, 2017, President Trump issued a presidential memorandum directing the DOL to examine the regulation, and on April 4, 2017, the DOL announced “the delay rule” that deferred the effective date of the regulation until June 9, 2017, as it continued its examination as mandated by the President’s executive order. The rule further delayed certain requirements associated with prohibited transaction exemptions, other than the impartial conduct standards, under the final regulation until January 1, 2018. On November 29, 2017, the DOL extended this transition period another 18 months. As a result, insurance agents can continue selling fixed-indexed annuities through July 1, 2019, provided the agent complies with the impartial conduct standards. Regardless, during this transition period, the increased regulatory burdens and compensation changes required of agents to comply with the prohibited transaction exemptions may negatively impact AFG’s business, results of operations or financial condition. If the final regulation is fully implemented on July 1, 2019, compliance with the prohibited transaction exemptions will likely result in additional regulatory burdens, changes to AFG’s product offerings and increased litigation risk, which could negatively impact AFG’s business, results of operations or financial condition. Management cannot currently predict the effect on AFG’s business if the DOL’s examination mandated by the President results in the proposal of significant changes to the final regulation (or a further delay of the July 1, 2019 implementation date).

Existing insurance-related laws and regulations may become more restrictive in the future or new restrictive laws may be enacted; it is not possible to predict the potential effects of these laws and regulations. The costs of compliance or the failure to comply with existing or future regulations could impose significant burdens on the Company.

A downgrade or potential downgrade in AFG’s financial strength and/or credit ratings by one or more rating agencies could adversely affect its business, financial condition, results of operations and/or cash flows.

Financial strength ratings are an important factor in establishing the competitive position of insurance companies and may have an effect on an insurance company’s sales. A downgrade out of the “A” category in AFG’s insurers’ claims-paying and financial strength ratings could significantly reduce AFG’s business volumes in certain lines of business, adversely impact AFG’s ability to access the capital markets and increase AFG’s borrowing costs.

In addition to the financial strength ratings of AFG’s principal insurance company subsidiaries, various rating agencies also publish credit ratings for AFG. Credit ratings are indicators of a debt issuer’s ability to meet the terms of debt obligations in a timely manner, are part of AFG’s overall financial profile and affect AFG’s ability to access certain types of capital. A downgrade in AFG’s credit ratings could have a material adverse effect on AFG’s financial condition and results of operations and cash flows in a number of ways, including adversely limiting access to capital markets, potentially increasing the cost of debt or increasing borrowing costs under AFG’s current revolving credit facility.

The continued threat of terrorism and ongoing military and other actions, as well as civil unrest, may adversely affect AFG’s results of operations.

The occurrence of one or more terrorist attacks could cause significant losses from insurance claims that could adversely affect AFG’s profitability. Private sector catastrophe reinsurance is limited and generally unavailable for terrorism losses caused by attacks with nuclear, biological, chemical or radiological weapons. Reinsurance coverage from the federal government under the Terrorism Risk Insurance Program Reauthorization Act of 2015 (“TRIPRA”) is also limited. Although TRIPRA provides benefits for certified acts of terrorism that exceed a certain threshold of industry losses ($140 million in 2017, increasing by $20 million annually to $200 million by 2020), those benefits are subject to a deductible and other limitations. In 2018, AFG would have to sustain losses from terrorism of over $670 million to be eligible for reinsurance under the program. In addition, because the interpretation of this law is untested, there is substantial uncertainty as to how it will be applied to specific circumstances. Finally, the program currently expires at the end of 2020, and the elimination or modification of the program, or a failure to extend the program, could adversely affect AFG’s property and casualty insurance business through increased exposure to a catastrophic level of terrorism losses.

AFG may experience difficulties with technology or data security, which could have an adverse effect on its business or reputation.

AFG uses computer systems and services to store, retrieve, evaluate and utilize company and customer data and information. Systems failures or outages could compromise AFG’s ability to perform business functions in a timely manner, which could harm its ability to conduct business and hurt its relationships with business partners and customers. In the event of a disaster such as a natural catastrophe, an industrial accident, a blackout, a computer virus, a terrorist attack or war, AFG’s systems may

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be inaccessible to employees, customers or business partners for an extended period of time. Even if AFG’s employees are able to report to work, they may be unable to perform their duties for an extended period of time if the Company’s data or systems are disabled or destroyed.

AFG’s computer systems are vulnerable to security breaches due to the sophistication of cyber-attacks, viruses, malware, hackers and other external hazards, as well as inadvertent errors, equipment and system failures, and employee misconduct. In addition, over time, and particularly recently, the sophistication of these threats continues to increase. AFG’s administrative and technical controls as well as other preventative actions used to reduce the risk of cyber incidents and protect AFG’s information may be insufficient to detect or prevent unauthorized access, other physical and electronic break-ins, cyber-attacks or other security breaches to AFG’s computer systems or those of third parties with whom AFG does business.

AFG has increasingly outsourced certain technology and business process functions to third parties and may continue to do so in the future. Outsourcing of certain technology and business process functions to third parties may expose AFG to increased risk related to data security or service disruptions. If AFG does not effectively develop, implement and monitor these relationships, third party providers do not perform as anticipated, technological or other problems are incurred with a transition, or outsourcing relationships relevant to AFG’s business process functions are terminated, AFG may not realize expected productivity improvements or cost efficiencies and may experience operational difficulties, increased costs and a loss of business.

The increased risks identified above could expose AFG to data loss, disruption of service, monetary and reputational damages, competitive disadvantage and significant increases in compliance costs and costs to improve the security and resiliency of AFG’s computer systems. The compromise of personal, confidential or proprietary information could also subject AFG to legal liability or regulatory action under evolving cyber-security, data protection and privacy laws and regulations enacted by the U.S. federal and state governments, Canada, the European Union (the “EU”) or other jurisdictions or by various regulatory organizations or exchanges. As a result, AFG’s ability to conduct business and its results of operations might be materially and adversely affected.

Any failure to protect the confidentiality of customer information could adversely affect AFG’s reputation and have a material adverse effect on AFG’s business, financial condition and results of operations.

AFG receives and is required to protect certain confidential information from customers, vendors and other third parties that may include financial information and, in connection with AFG’s property and casualty insurance operations, medical information. In addition, AFG and certain of its third-party vendors receive and store personal information in connection with AFG’s human resources operations and other aspects of AFG’s business. AFG is subject to numerous federal, state and international laws regarding the privacy and security of personal information, which laws vary significantly from jurisdiction to jurisdiction. If any disruption or security breach results in a loss or damage to AFG’s data, or inappropriate disclosure of AFG’s confidential information or that of others, it could damage AFG’s reputation, affect its relationships with customers and clients, lead to claims against AFG, result in regulatory action and harm AFG’s business. In addition, AFG may be required to incur significant costs to mitigate the damage caused by any security breach or to protect against future damage.

AFG’s property and casualty reserves may be inadequate, which could have a material adverse effect on AFG’s results of operations.

Liabilities for unpaid losses and loss adjustment expenses do not represent an exact calculation of liability but instead represent management estimates of what the ultimate settlement and administration of claims will cost, supported by actuarial expertise and projection techniques, at a given accounting date. The process of estimating unpaid losses and loss adjustment expense reserves involves a high degree of judgment and is subject to a number of variables. These variables can be affected by both internal and external events, such as: changes in claims handling procedures, adverse changes in loss cost trends (including inflationary pressures on medical costs), economic conditions (including general inflation), legal trends and legislative changes, and varying judgments and viewpoints of the individuals involved in the estimation process, among others. The impact of many of these items on ultimate costs for unpaid losses and loss adjustment expenses is difficult to estimate. Unpaid losses and loss adjustment expense reserve estimation difficulties also differ significantly by product line due to differences in claim complexity, the volume of claims, the potential severity of individual claims, the determination of an occurrence date for a claim and lags in the time between damage, loss or injury and when a claim is actually reported to the insurer. In addition, the historic development of AFG’s liability for unpaid losses and loss adjustment expenses may not necessarily reflect future trends in the development of these amounts. Accordingly, it is not appropriate to extrapolate future redundancies or deficiencies based on historical information. To the extent that reserves are inadequate and are strengthened, AFG’s profitability would be adversely affected because the amount of any such increase would be treated as a charge to earnings in the period in which the deficiency is recognized.

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AFG’s results of operations could be adversely impacted by severe weather conditions or other catastrophes, both natural and man-made.

Catastrophes can be caused by unpredictable natural events such as hurricanes, windstorms, severe storms, tornadoes, floods, hailstorms, severe winter weather, earthquakes, explosions and fire, and by man-made events, such as terrorist attacks. While not considered a catastrophe by insurance industry standards, droughts can have a significant adverse impact on AFG’s crop insurance results. In addition, extreme weather events that are linked to rising temperatures, changing global weather patterns and fluctuating rain, snow and sea levels could result in increased occurrence and severity of catastrophes. The extent of gross losses from a catastrophe event is a function of both the total amount of insured exposure in the area affected by the event and the severity of the event, potentially mitigated by any reinsurance coverage purchased by AFG’s insurance subsidiaries. In addition, certain catastrophes could result in both property and non-property claims from the same event. A severe catastrophe or a series of catastrophes could result in losses exceeding AFG’s reinsurance protection and may have a material adverse impact on its results of operations or financial condition.

Volatility in crop prices, as a result of weather conditions or otherwise, could adversely impact AFG’s results of operations.

Weather conditions, including too much moisture (flooding or excessive rain) or not enough moisture (droughts), and the level of crop prices in the commodities market heavily impact AFG’s crop insurance business. These factors are inherently unpredictable and could result in significant volatility in the results of the crop insurance business from one year to the next. AFG’s crop results could also be negatively impacted by pests and plant disease. A large decline in the commodity prices of one or more of the major crops that AFG insures could have a material adverse effect on AFG’s results of operations or financial condition.

AFG’s international operations exposes it to investment, political and economic risks, including foreign currency and credit risk.

AFG’s international operations expose AFG to a number of additional risks. These risks include restrictions such as price controls, capital controls, currency exchange limits, ownership limits and other restrictive or anti-competitive governmental actions or requirements, which could have an adverse effect on AFG’s business and reputation. AFG’s business activities outside the United States may also be subject to political and economic risks, including foreign currency and credit risk.

AFG’s business activities outside the United States subject AFG to additional domestic and foreign laws and regulations, including the Foreign Corrupt Practices Act, the UK Bribery Act and similar laws in other countries that prohibit the making of improper payments to foreign officials. Although AFG has policies and controls in place that are designed to ensure compliance with these laws, if those controls are ineffective and an employee or intermediary fails to comply with applicable laws and regulations, AFG could suffer civil and criminal penalties and AFG’s business and reputation could be adversely affected. Some countries have laws and regulations that lack clarity and, even with local expertise and effective controls, it can be difficult to determine the exact requirements of, and potential liability under, the local laws. Failure to comply with local laws in a particular market may result in substantial liability and could have a significant and negative effect not only on AFG’s business in that market but also on AFG’s reputation generally.

Exposure to asbestos or environmental claims could materially adversely affect AFG’s results of operations and financial condition.

AFG has asbestos and environmental (“A&E”) exposures arising from its insurance operations and former railroad and manufacturing operations. Uncertainties surrounding the final resolution of these asbestos and environmental liabilities continue, and it is difficult to estimate AFG’s ultimate exposure to such liabilities and related litigation. Establishing A&E liabilities is subject to uncertainties that are significantly greater than those presented by other types of liabilities. Uncertainties include the long delays between exposure and manifestation of any bodily injury or property damage, difficulty in identifying the source of the asbestos or environmental contamination, long reporting delays, the risks inherent in complex litigation and difficulty in properly allocating liability for the asbestos or environmental damage. As a result, A&E liabilities are subject to revision as new information becomes available and as claims are made and develop. Claimants continue to assert new and novel theories of recovery, and from time to time, there is proposed state and federal legislation regarding A&E liability, which would also affect AFG’s exposure. If AFG has not established adequate reserves to cover future claims, AFG’s results of operations and financial condition could be materially adversely affected.

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Variations from the actuarial assumptions used to establish certain assets and liabilities in AFG’s annuity business could adversely affect AFG’s results of operations.

The earnings on AFG’s annuity products depend significantly upon the extent to which actual experience is consistent with the assumptions used in setting reserves and establishing and amortizing deferred policy acquisition costs (“DPAC”). These assumptions relate to investment yields (and spreads over fixed annuity crediting rates), benefit utilization rates, equity market performance, the cost of call options used in the fixed-indexed annuity business, mortality, surrenders, annuitizations and other withdrawals. Developing such assumptions is complex and involves information obtained from company-specific and industry-wide data, as well as general economic information. These assumptions, and therefore AFG’s results of operations, could be negatively impacted by changes in any of the factors listed above.

Changes to existing accounting standards could adversely impact AFG’s reported results of operations.

As a U.S.-based SEC registrant, AFG prepares its financial statements in accordance with GAAP, as promulgated by the Financial Accounting Standards Board, subject to the accounting-related rules and interpretations of the SEC. Changes in accounting standards, particularly those that specifically apply to insurance company operations, may impact AFG’s reported financial results and could cause increased volatility in reported earnings, resulting in other adverse impacts on AFG’s ratings and cost of capital, and decrease the understandability of AFG’s financial results as well as the comparability of AFG’s reported results with other insurers.

As a holding company, AFG is dependent on the operations of its insurance company subsidiaries to meet its obligations and pay future dividends.

AFG is a holding company and a legal entity separate and distinct from its insurance company subsidiaries. As a holding company without significant operations of its own, AFG’s principal sources of funds are dividends and other distributions from its insurance company subsidiaries. State insurance laws differ from state to state but, absent advance regulatory approval, restrict the maximum amount of dividends that may be paid by an insurer to its shareholders in any twelve-month period. AFG’s rights to participate in any distribution of assets of its insurance company subsidiaries are subject to prior claims of policyholders and creditors (except to the extent that its rights, if any, as a creditor are recognized). Consequently, AFG’s ability to pay its debts, expenses and dividends to its shareholders may be limited.

Adverse developments in the financial markets may limit AFG’s access to capital.

Financial markets in the U.S. and elsewhere can experience extreme volatility, which exerts downward pressure on stock prices and limits access to the equity and debt markets for certain issuers, including AFG. AFG can borrow up to $500 million under its revolving credit facility, which expires in June 2021. In addition, AFG’s access to funds through this facility is dependent on the ability of its banks to meet their funding commitments. There were no borrowings outstanding under AFG’s bank credit line or any other parent company short-term borrowing arrangements during 2017. If AFG cannot obtain adequate capital or sources of credit on favorable terms, or at all, its business, operating results and financial condition would be adversely affected.

AFG may suffer losses from litigation, which could materially and adversely affect AFG’s financial condition and business operations.

AFG, primarily in its property and casualty insurance operations and historical operations, is involved in litigation. Litigation by nature is unpredictable, and the outcome of any case is uncertain and could result in liabilities that vary from the amounts AFG has currently recorded. Pervasive or significant changes in the judicial environment relating to matters such as trends in the size of jury awards, developments in the law relating to the liability of insurers or tort defendants, and rulings concerning the availability or amount of certain types of damages could cause AFG’s ultimate liabilities to change from current expectations. Changes in federal or state tort litigation laws or other applicable law could have a similar effect. It is not possible to predict changes in the judicial and legislative environment, including in connection with asbestos and environmental claims. AFG’s business, financial condition, results of operations and liquidity could also be adversely affected if judicial or legislative developments cause AFG’s ultimate liabilities to increase from current expectations.

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Recent developments relating to the United Kingdom’s referendum vote in favor of leaving the EU could adversely affect AFG’s London-based property and casualty insurance operations.

The United Kingdom (“UK”) held a referendum on June 23, 2016 in which a majority of voters voted for the UK’s withdrawal from the European Union (“Brexit”). Because of this vote, the terms of the UK’s withdrawal from the EU and the relationship between the UK and EU going forward will have to be negotiated, including the terms of trade between the UK and the EU. The ultimate impact of Brexit is uncertain and will depend on any agreements that the UK makes to retain access to EU markets. Brexit could also lead to legal uncertainty and potentially divergent national laws and regulations as the UK determines which EU laws to replace or replicate. These or other adverse consequences from Brexit could adversely affect the operations and business opportunities of AFG’s Ireland-based property and casualty subsidiary and Neon, AFG’s London-based Lloyd’s syndicate.

Certain shareholders exercise substantial control over AFG’s affairs, which may impede a change of control transaction.

Carl H. Lindner III and S. Craig Lindner are each Co-Chief Executive Officers and Directors of AFG. Together, Carl H. Lindner III and S. Craig Lindner beneficially own 12.1% of AFG’s outstanding Common Stock as of February 1, 2018. Other members of the Lindner family own, directly or through trusts, a significant number of additional shares of AFG Common Stock. As a result, the Lindner family has the ability to exercise significant influence over AFG’s management, including over matters requiring shareholder approval. Such concentrated ownership could prevent an acquisition of AFG at a price which other shareholders may find attractive.

The price of AFG Common Stock may fluctuate significantly, which may make it difficult for holders to resell common stock when they want or at a price they find attractive.

The price of AFG’s Common Stock, which is listed on the NYSE, constantly changes. During 2017, AFG’s Common Stock traded at prices ranging between $85.57 and $109.41. AFG’s Common Stock price can fluctuate as a result of a variety of factors, many of which are beyond its control. These factors include but are not limited to:

• actual or anticipated variations in quarterly operating results;

• actual or anticipated changes in the dividends paid on AFG Common Stock;

• rating agency actions;

• recommendations by securities analysts;

• significant acquisitions or business combinations, strategic partnerships, joint ventures or capital commitments by or involving AFG or its competitors;

• operating and stock price performance of other companies that investors deem comparable to AFG;

• news reports relating to trends, concerns and other issues in AFG’s lines of business;

• general economic conditions, including volatility in the financial markets; and

• geopolitical conditions such as acts or threats of terrorism or military conflicts.

ITEM 2

Properties

AFG and its insurance subsidiaries lease the majority of their office and storage facilities in numerous cities throughout the United States and internationally, including the Company’s headquarters in Cincinnati, Ohio. Subsidiaries of AFG own several other buildings in downtown Cincinnati. AFG and its affiliates occupy approximately half of the aggregate 670,000 square feet of commercial and office space in these buildings. A property and casualty insurance subsidiary occupies approximately 87% of the 164,000 square feet of rentable office space on 17.5 acres of land that it owns in Richfield, Ohio. See Item 1 — Business — “Other Operations” for a discussion of AFG’s other commercial real estate operations.

ITEM 3

Legal Proceedings

AFG and its subsidiaries are involved in litigation from time to time, generally arising in the ordinary course of business. This litigation may include, but is not limited to, general commercial disputes, lawsuits brought by policyholders, employment matters, reinsurance collection matters and actions challenging certain business practices of insurance subsidiaries. Except for the following, management believes that none of the litigation meets the threshold for disclosure under this Item.

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AFG’s insurance company subsidiaries and its 100%-owned subsidiary, American Premier Underwriters (including its subsidiaries, “American Premier”), are parties to litigation and receive claims alleging injuries and damages from asbestos, environmental and other substances and workplace hazards and have established loss accruals for such potential liabilities. None of such litigation or claims is individually material to AFG; however, the ultimate loss for these claims may vary materially from amounts currently recorded as the conditions surrounding resolution of these claims continue to change.

American Premier is a party or named as a potentially responsible party in a number of proceedings and claims by regulatory agencies and private parties under various environmental protection laws, including the Comprehensive Environmental Response, Compensation and Liability Act, seeking to impose responsibility on American Premier for hazardous waste or discharge remediation costs at certain railroad sites formerly owned by its predecessor, Penn Central Transportation Company (“PCTC”), and at certain other sites where hazardous waste or discharge allegedly generated by PCTC’s railroad operations and American Premier’s former manufacturing operations is present. It is difficult to estimate American Premier’s liability for remediation costs at these sites for a number of reasons, including the number and financial resources of other potentially responsible parties involved at a given site, the varying availability of evidence by which to allocate responsibility among such parties, the wide range of costs for possible remediation alternatives, changing technology and the period of time over which these matters develop. Nevertheless, American Premier believes that its accruals for potential environmental liabilities are adequate to cover the probable amount of such liabilities, based on American Premier’s estimates of remediation costs and related expenses and its estimates of the portions of such costs that will be borne by other parties. Such estimates are based on information currently available to American Premier and are subject to future change as additional information becomes available.

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PART II

ITEM 5

Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

AFG Common Stock is listed and traded on the New York Stock Exchange under the symbol AFG. The information presented in the table below represents the high and low sales prices per share reported on the NYSE Composite Tape.

	2017				2016
	High		Low		High		Low
First Quarter	$	97.00	$	85.57	$	71.66	$	64.87
Second Quarter	103.19		93.25		73.95		66.78
Third Quarter	105.58		95.19		76.03		70.82
Fourth Quarter	109.41		101.02		88.54		73.38

There were approximately 5,200 shareholders of record of AFG Common Stock at February 1, 2018. AFG declared and paid regular quarterly dividends of $0.3125 per share in January, April and July 2017. In August 2017, AFG increased its quarterly dividend to $0.35 per share and declared and paid its first dividend at that rate in October 2017. In 2016, AFG declared and paid regular quarterly dividends of $0.28 per share in January, April and July and $0.3125 per share in October. In May and November 2017 and November 2016, AFG declared additional special cash dividends of $1.50, $2.00 and $1.00 per share of AFG Common Stock, which were paid in May and November 2017 and December 2016, respectively. The ability of AFG to pay dividends will be dependent upon, among other things, the availability of dividends and payments under intercompany tax allocation agreements from its insurance company subsidiaries.

Issuer Purchases of Equity Securities   AFG did not repurchase any shares of its Common Stock during the year ended December 31, 2017. There are 4,132,838 remaining shares that may be repurchased under the Plans authorized by AFG’s Board of Directors in December 2014 and February 2016.

AFG acquired 34,922 shares of its Common Stock (at an average of $94.07 per share) in the first nine months of 2017, 41 shares (at $103.80 per share) in October 2017 and 2,755 shares (at an average of $108.20 per share) in December 2017 in connection with its stock incentive plans.

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ITEM 6

Selected Financial Data

The following table sets forth certain data for the periods indicated (dollars in millions, except per share data).

	2017		2016		2015		2014			2013
Earnings Statement Data:
Total revenues	$	6,865	$	6,498	$	6,145	$	5,733		$	5,103
Earnings before income taxes	724		787		565		626			689
Net earnings, including noncontrolling interests	477		668		370		406			453
Less: Net earnings (loss) attributable to noncontrolling interests	2		19		18		(46		)	(18		)
Net earnings attributable to shareholders	475		649		352		452			471
Earnings attributable to shareholders per Common Share:
Basic — GAAP	$	5.40	$	7.47	$	4.02	$	5.07		$	5.27
Diluted — GAAP	5.28		7.33		3.94		4.97			5.16
Core net operating earnings per share (diluted) (a)	6.55		6.03		5.44		4.82			4.22
Cash dividends paid per share of Common Stock (b)	$	4.7875	$	2.1525	$	2.03	$	1.91		$	1.805
Ratio of earnings to fixed charges including annuity benefits (c)	1.72		1.85		1.66		1.90			2.15
Balance Sheet Data:
Cash and investments	$	46,048	$	41,433	$	37,736	$	36,210		$	31,313
Total assets	60,658		55,072		49,837		47,513			42,070
Property and casualty insurance reserves:
Unpaid losses and loss adjustment expenses	9,678		8,563		8,127		7,872			6,410
Unearned premiums	2,410		2,171		2,060		1,956			1,757
Annuity benefits accumulated	33,316		29,907		26,622		23,764			20,944
Life, accident and health reserves	658		691		705		2,175			2,008
Long-term debt	1,301		1,283		998		1,039			896
Shareholders’ equity	5,330		4,916		4,592		4,879			4,599
Less:
Net unrealized gains related to fixed maturities (d)	606		299		279		604			441
Appropriated retained earnings	—		—		—		(2		)	49
Adjusted shareholders’ equity (e)	4,724		4,617		4,313		4,277			4,109
Book value per share	$	60.38	$	56.55	$	52.50	$	55.62		$	51.38
Adjusted book value per share (e)	53.51		53.11		49.32		48.76			45.90

(a) AFG’s net earnings per share (diluted), determined in accordance with GAAP, includes certain items that may not be indicative of its ongoing core operations. AFG believes that its core net operating earnings per share provides management, financial analysts, rating agencies and investors with an understanding of the results from the ongoing operations of the Company by excluding the impact of net realized investment gains and losses and other items that are not necessarily indicative of operating trends. AFG’s management uses core net operating earnings to evaluate financial performance against historical results because it believes this provides a more comparable measure of its continuing business. Core net operating earnings is also used by AFG’s management as a basis for strategic planning and forecasting. Core net operating earnings per share (diluted) is a non-GAAP financial measure. See Item 7 — Management’s Discussion and Analysis — “Results of Operations — General” for additional details, including a reconciliation of core net operating earnings per share (diluted) to net earnings available to shareholders (diluted) computed in accordance with GAAP.

(b) Includes special cash dividends of $3.50 paid in 2017 and $1.00 per share paid in 2016, 2015, 2014 and 2013.

(c) Fixed charges are computed on a “total enterprise” basis. For purposes of calculating the ratios, “earnings” have been computed by adding to pretax earnings the fixed charges and the noncontrolling interests in earnings of subsidiaries having fixed charges and the undistributed equity in earnings or losses of investees. Fixed charges include interest (including annuity benefits as indicated), amortization of debt premium/discount and expense, preferred dividend and distribution requirements of subsidiaries and a portion of rental expense deemed to be representative of the interest factor. The ratio of earnings to fixed charges excluding annuity benefits was 7.67, 8.62, 6.58, 7.95 and 8.86 for 2017, 2016, 2015, 2014 and 2013, respectively. Although the ratio of earnings to fixed charges excluding annuity benefits is not required or encouraged to be disclosed under Securities and Exchange Commission rules, some investors and lenders may not consider interest credited to annuity policyholders’ accounts a borrowing cost for an insurance company, and accordingly, believe this ratio is meaningful.

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(d) Net unrealized gains related to fixed maturities, which includes net unrealized gains (losses) on cash flow hedges, is part of accumulated other comprehensive income and is shown net of related adjustments to deferred policy acquisition costs and certain liabilities in the annuity, long-term care and life businesses.

(e) Adjusted shareholders’ equity and adjusted book value per share exclude appropriated retained earnings and net unrealized gains related to fixed maturity securities. Management believes that investors find a measurement of shareholders’ equity excluding these items to be meaningful as (i) the unrealized gains related to fixed maturities fluctuates with changes in interest rates in a way that is primarily only meaningful to AFG if it sells those investments and (ii) appropriated retained earnings represents amounts that will ultimately inure to the debt holders of the collateralized loan obligations managed by AFG (see Note A — “Accounting Policies — Managed Investment Entities” to the financial statements).

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ITEM 7

Management’s Discussion and Analysis of Financial Condition and Results of Operations

INDEX TO MD&A
	Page		Page
General	26	Results of Operations — Fourth Quarter	52
Overview	26	Segmented Statement of Earnings	52
Critical Accounting Policies	27	Property and Casualty Insurance	53
Liquidity and Capital Resources	27	Annuity	63
Ratios	27	Run-off Long-Term Care and Life	70
Condensed Consolidated Cash Flows	28	Holding Company, Other and Unallocated	71
Parent and Subsidiary Liquidity	29	Results of Operations — Full Year	75
Condensed Parent Only Cash Flows	31	Segmented Statement of Earnings	75
Contractual Obligations	32	Property and Casualty Insurance	77
Off-Balance Sheet Arrangements	32	Annuity	88
Investments	32	Run-off Long-Term Care and Life	96
Uncertainties	37	Holding Company, Other and Unallocated	97
Managed Investment Entities	45	Recent and Pending Accounting Standards	100
Results of Operations	50
General	50

GENERAL

Following is a discussion and analysis of the financial statements and other statistical data that management believes will enhance the understanding of AFG’s financial condition and results of operations. This discussion should be read in conjunction with the financial statements beginning on page F-1.

OVERVIEW

Financial Condition

AFG is organized as a holding company with almost all of its operations being conducted by subsidiaries. AFG, however, has continuing cash needs for administrative expenses, the payment of principal and interest on borrowings, shareholder dividends, and taxes. Therefore, certain analyses are most meaningfully presented on a parent only basis while others are best done on a total enterprise basis. In addition, because most of its businesses are financial in nature, AFG does not prepare its consolidated financial statements using a current-noncurrent format. Consequently, certain traditional ratios and financial analysis tests are not meaningful.

At December 31, 2017, AFG (parent) held approximately $369 million in cash and securities and had $500 million available under a bank line of credit, which expires in June 2021.

Results of Operations

Through the operations of its subsidiaries, AFG is engaged primarily in property and casualty insurance, focusing on specialized commercial products for businesses, and in the sale of fixed and fixed-indexed annuities in the retail, financial institutions and education markets.

Fourth quarter 2017 net earnings attributable to AFG’s shareholders were $166 million ($1.84 per share, diluted) compared to $385 million ($4.33 per share, diluted) in the fourth quarter of 2016, reflecting:

• higher underwriting profit in the property and casualty insurance segment,

• lower earnings in the annuity segment, resulting from the fair value accounting for fixed-indexed annuities,

• lower net realized gains on securities in the fourth quarter of 2017 compared to the fourth quarter of 2016,

• the fourth quarter 2017 loss on retirement of debt,

• the fourth quarter 2017 tax benefit related to the Neon Underwriting Ltd. (“Neon”) restructuring,

• the fourth quarter 2017 tax expense related to the change in the U.S. corporate tax rate and

• the fourth quarter 2016 tax benefits from the National Interstate merger and Neon restructuring.

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Full year 2017 net earnings attributable to AFG’s shareholders were $475 million ($5.28 per share, diluted) compared to $649 million ($7.33 per share, diluted) in 2016, reflecting:

• higher underwriting profit in the property and casualty insurance segment due primarily to higher favorable prior year reserve development,

• higher earnings in the annuity segment,

• higher profitability in the run-off long-term care and life segment,

• lower realized gains on securities in 2017 compared to 2016,

• the 2017 loss on retirement of debt,

• the fourth quarter 2017 tax benefit related to the Neon restructuring,

• the fourth quarter 2017 tax expense related to the change in the U.S. corporate tax rate,

• the second quarter 2016 gain on the sale of an apartment property, and

• the fourth quarter 2016 tax benefits related to the National Interstate merger and Neon restructuring.

CRITICAL ACCOUNTING POLICIES

Significant accounting policies are summarized in Note A — “Accounting Policies” to the financial statements. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that can have a significant effect on amounts reported in the financial statements. As more information becomes known, these estimates and assumptions change and, thus, impact amounts reported in the future. The areas where management believes the degree of judgment required to determine amounts recorded in the financial statements is most significant are as follows:

• the establishment of insurance reserves, especially asbestos and environmental-related reserves,

• the recoverability of reinsurance,

• the recoverability of deferred acquisition costs,

• the establishment of asbestos and environmental reserves of former railroad and manufacturing operations, and

• the valuation of investments, including the determination of other-than-temporary impairments.

See “Liquidity and Capital Resources — Uncertainties” for a discussion of insurance reserves, recoverables from reinsurers, and contingencies related to American Premier’s former operations and “Liquidity and Capital Resources — Investments” for a discussion of impairments on investments. Deferred policy acquisition costs (“DPAC”) and certain liabilities related to annuities are amortized in relation to the present value of expected gross profits on the policies. Assumptions considered in determining expected gross profits involve significant judgment and include management’s estimates of interest rates and investment spreads, surrenders, annuitizations, renewal premiums and mortality. Should actual experience require management to change its assumptions (commonly referred to as “unlocking”), a charge or credit would be recorded to adjust DPAC or annuity liabilities to the levels they would have been if the new assumptions had been used from the inception date of each policy.

LIQUIDITY AND CAPITAL RESOURCES

Ratios   AFG’s debt to total capital ratio on a consolidated basis is shown below (dollars in millions). Management intends to maintain the ratio of debt to capital at or below 25% and intends to maintain the capital of its significant insurance subsidiaries at or above levels currently indicated by rating agencies as appropriate for the current ratings.

	December 31,
	2017			2016
Principal amount of long-term debt	$	1,318		$	1,308
Total capital	6,033			5,921
Ratio of debt to total capital:
Including subordinated debt	21.8		%	22.1		%
Excluding subordinated debt	16.9		%	17.0		%

The ratio of debt to total capital is a non-GAAP measure that management believes is useful for investors, analysts and independent ratings agencies to evaluate AFG’s financial strength and liquidity and to provide insight into how AFG finances its operations. In addition, maintaining a ratio of debt, excluding subordinated debt and debt secured by real estate (if any), to total capital of 35% or lower is a financial covenant in AFG’s bank credit facility. The ratio is calculated by dividing the principal amount of AFG’s long-term debt by its total capital, which includes long-term debt, noncontrolling interests and shareholders’ equity (excluding unrealized gains (losses) on fixed maturity investments).

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AFG’s ratio of earnings to fixed charges, including annuity benefits as a fixed charge, was 1.72 for the year ended December 31, 2017. Excluding annuity benefits, this ratio was 7.67. Although the ratio excluding annuity benefits is not required or encouraged to be disclosed under Securities and Exchange Commission rules, it is presented because interest credited to annuity policyholder accounts is not always considered a borrowing cost for an insurance company.

The NAIC’s model law for risk based capital (“RBC”) applies to both life and property and casualty companies. RBC formulas determine the amount of capital that an insurance company needs so that it has an acceptable expectation of not becoming financially impaired. At December 31, 2017, the capital ratios of all AFG insurance companies substantially exceeded the RBC requirements.

Condensed Consolidated Cash FlowsAFG’s principal sources of cash include insurance premiums, income from its investment portfolio and proceeds from the maturities, redemptions and sales of investments. Insurance premiums in excess of acquisition expenses and operating costs are invested until they are needed to meet policyholder obligations or made available to the parent company through dividends to cover debt obligations and corporate expenses, and to provide returns to shareholders through share repurchases and dividends. Cash flows from operating, investing and financing activities as detailed in AFG’s Consolidated Statement of Cash Flows are shown below (in millions):

	Year ended December 31,
	2017			2016			2015
Net cash provided by operating activities	$	1,804		$	1,150		$	1,353
Net cash used in investing activities	(3,292		)	(2,981		)	(4,573		)
Net cash provided by financing activities	1,719			2,718			3,097
Net change in cash and cash equivalents	$	231		$	887		$	(123	)

Net Cash Provided by Operating Activities   AFG’s property and casualty insurance operations typically produce positive net operating cash flows as premiums collected and investment income exceed policy acquisition costs, claims payments and operating expenses. AFG’s net cash provided by operating activities is impacted by the level and timing of property and casualty premiums, claim and expense payments and recoveries from reinsurers. AFG’s annuity operations typically produce positive net operating cash flows as investment income exceeds acquisition costs and operating expenses. Interest credited on annuity policyholder funds is a non-cash increase in AFG’s annuity benefits accumulated liability and annuity premiums, benefits and withdrawals are considered financing activities due to the deposit-type nature of annuities. Cash flows provided by operating activities also include the activity of AFG’s managed investment entities (collateralized loan obligations) other than those activities included in investing or financing activities. The changes in the assets and liabilities of the managed investment entities included in operating activities increased cash flows from operating activities by $60 million in 2017 and reduced cash flows from operating activities by $279 million in 2016 and $190 million in 2015, accounting for a $339 millionincrease in cash flows from operating activities in 2017 compared to 2016 and an $89 milliondecrease in cash flows from operating activities in 2016 compared to 2015. As discussed in Note A — “Accounting Policies — Managed Investment Entities” to the financial statements, AFG has no right to use the CLO assets and no obligation to pay the CLO liabilities and such assets and liabilities are shown separately in AFG’s Balance Sheet. Excluding the impact of the managed investment entities, net cash provided by operating activities was $1.74 billion, $1.43 billion and $1.54 billion in 2017, 2016 and 2015, respectively.

Net Cash Used in Investing Activities   AFG’s investing activities consist primarily of the investment of funds provided by its property and casualty and annuity products. Net cash used in investing activities was $3.29 billion in 2017 compared to $2.98 billion in 2016, an increase of $311 million. As discussed below (under net cash provided by financing activities), AFG’s annuity group had net cash flows from annuity policyholders of $1.99 billion in 2017 and $2.35 billion in 2016, which is the primary source of AFG’s cash used in investing activities. Settlements of equity index call options exceeded purchases by $285 million in 2017 compared to purchases exceeding settlements by $110 million in 2016, accounting for a $395 million decrease in cash used in investing activities. In general, purchases of equity index call options have increased due to growth in the fixed-indexed annuity business while proceeds from settlements of equity options are impacted by the performance of the stock market during the term of the options. In addition to the investment of funds provided by the insurance operations, investing activities also include the purchase and disposal of managed investment entity investments, which are presented separately in AFG’s Balance Sheet. Net investment activity in the managed investment entities was a $205 millionuse of cash in 2017 compared to a $364 millionuse of cash in 2016, accounting for a $159 million decrease in net cash used in investing activities in 2017 compared to 2016. See Note A — “Accounting Policies — Managed Investment Entities” and Note H — “Managed Investment Entities” to the financial statements.

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Net cash used in investing activities was $2.98 billion in 2016 compared to $4.57 billion in 2015, a decrease of $1.59 billion. The $151 million decrease in net cash flows from annuity policyholders in 2016 as compared to 2015 decreased the amount of cash available for investment in 2016 compared to 2015. In addition, AFG’s cash on hand increased by $887 million during 2016, primarily in the property and casualty and annuity segments reflecting the timing of investing available cash in those segments. Net investment activity in the managed investment entities was a $364 million use of cash in 2016 compared to a $675 million use of cash in 2015, accounting for a $311 million decrease in net cash used in investing activities in 2016 compared to 2015.

Net Cash Provided by Financing Activities   AFG’s financing activities consist primarily of transactions with annuity policyholders, issuances and retirements of long-term debt, repurchases of common stock and dividend payments. Net cash provided by financing activities was $1.72 billion in 2017 compared to $2.72 billion in 2016, a decrease of $999 million. Annuity receipts exceeded annuity surrenders, benefits, withdrawals and transfers by $1.99 billion in 2017 compared to $2.35 billion in 2016, resulting in a $362 milliondecrease in net cash provided by financing activities in 2017 compared to 2016. In 2017, AFG issued $590 million of 4.50% Senior Notes due in 2047 and $125 million of 3.50% Senior Notes due in 2026, the net proceeds of which contributed $712 million to net cash provided by financing activities in 2017 compared to net proceeds from additional long-term borrowings of $302 million in 2016, which accounted for a $410 millionincrease in cash provided by financing activities in 2017 compared to 2016. Redemptions of long-term debt were a $745 millionuse of cash in 2017 and an $18 millionuse of cash in 2016, which accounted for a $727 million decrease in net cash provided by financing activities in 2017 compared to 2016. There were no shares of AFG Common Stock repurchased in 2017 compared to $133 million repurchased in 2016. In addition to its regular quarterly cash dividends, AFG paid special cash dividends of $3.50 per share and $1.00 per share of American Financial Group Common Stock in 2017 and 2016, respectively, which resulted in total cash dividends of $417 million in 2017 compared to $185 million in 2016. Additionally, in 2016, $315 million was used to fund the acquisition of the noncontrolling interest in National Interstate Corporation. Financing activities also include issuances and retirements of managed investment entity liabilities, which are nonrecourse to AFG and presented separately in AFG’s Balance Sheet. Issuances of managed investment entity liabilities exceeded retirements by $146 million in 2017 compared to $693 million in 2016, accounting for a $547 million decrease in net cash provided by financing activities in 2017 compared to 2016. See Note A — “Accounting Policies — Managed Investment Entities” and Note H — “Managed Investment Entities” to the financial statements.

Net cash provided by financing activities was $2.72 billion in 2016 compared to $3.10 billion in 2015, a decrease of $379 million. Annuity receipts exceeded annuity surrenders, benefits, withdrawals and transfers by $2.35 billion in 2016 compared to $2.50 billion in 2015, resulting in a $151 milliondecrease in net cash provided by financing activities in 2016 compared to 2015. AFG issued $300 million of 3.50% Senior Notes in 2016 and $150 million of 6% Subordinated Debentures in 2015, the net proceeds of which contributed $296 million in 2016 and $145 million in 2015 to net cash provided by financing activities. Redemptions of long-term debt was an $18 million use of cash in 2016 and a $192 million use of cash in 2015. During 2016, AFG repurchased $133 million of its Common Stock compared to $126 million repurchased in 2015, which accounted for a $7 milliondecrease in net cash provided by financing activities in 2016 compared to 2015. Additionally, during the fourth quarter of 2016, $315 million was used to fund the acquisition of the noncontrolling interest in National Interstate Corporation. Issuances of managed investment entity liabilities exceeded retirements by $693 million in 2016 compared to $890 million in 2015, accounting for a $197 milliondecrease in net cash provided by financing activities in 2016 compared to 2015.

Parent and Subsidiary Liquidity

Parent Holding Company Liquidity   Management believes AFG has sufficient resources to meet its liquidity requirements. If funds generated from operations, including dividends, tax payments and borrowings from subsidiaries, are insufficient to meet fixed charges in any period, AFG would be required to utilize parent company cash and marketable securities or to generate cash through borrowings, sales of other assets, or similar transactions.

AFG can borrow up to $500 million under its revolving credit facility which expires in June 2021. Amounts borrowed under this agreement bear interest at rates ranging from 1.00% to 1.875% (currently 1.375%) over LIBOR based on AFG’s credit rating. There were no borrowings under this agreement, or under any other parent company short-term borrowing arrangements, during 2017.

In June 2017, AFG issued $350 million of 4.50% Senior Notes due in June 2047. Net proceeds from the offering were used to redeem AFG’s $230 million outstanding principal amount of 6-3/8% Senior Notes due in June 2042, at par value in June 2017 and AFG’s $125 million outstanding principal amount of 5-3/4% Senior Notes due in August 2042 at par value in August 2017.

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In November 2017, AFG issued an additional $240 million of 4.50% Senior Notes due in 2047 and $125 million of 3.50% Senior Notes due in 2026. The net proceeds of the offering were used to redeem AFG’s $350 million outstanding principal amount of 9-7/8% Senior Notes due in June 2019 for $388 million (including a make-whole premium of $38 million) in December 2017.

In 2017, AFG paid special cash dividends of $3.50 per share of AFG Common Stock ($1.50 per share in May and $2.00 per share in November) totaling approximately $308 million.

In November 2016, AFG acquired the 49% of National Interstate Corporation (“NATL”) not previously owned by AFG’s wholly-owned subsidiary, Great American Insurance Company (“GAI”) for $315 million ($32.00 per share) in cash in a merger transaction. In addition, NATL paid a one-time special cash dividend of $0.50 per share to its shareholders immediately prior to the merger closing ($5 million was paid to noncontrolling shareholders). See Note B — “Acquisitions and Sale of Businesses” to the financial statements.

In August 2016, AFG issued $300 million of 3.50% Senior Notes due 2026. AFG used the net proceeds from the offering to fund a portion of the acquisition of NATL mentioned above.

During 2016, AFG repurchased 1.9 million shares of its Common Stock for $133 million. In December 2016, AFG paid a special cash dividend of $1.00 per share of AFG Common Stock totaling approximately $87 million.

In November 2015, AFG issued $150 million of 6% Subordinated Debentures due 2055. In September 2015, AFG redeemed its $132 million of 7% Senior Notes due 2050 at par using cash on hand at the parent company.

During 2015, AFG repurchased 2.0 million shares of its Common Stock for $126 million. In December 2015, AFG paid a special cash dividend of $1.00 per share of AFG Common Stock totaling approximately $88 million.

All debentures and notes issued by AFG are rated investment grade by two nationally recognized rating agencies. Under a currently effective shelf registration statement, AFG can offer additional equity or debt securities. The shelf registration provides AFG with flexibility to access the capital markets from time to time as market and other conditions permit.

Under a tax allocation agreement with AFG, its 80%-owned U.S. subsidiaries generally pay taxes to (or recover taxes from) AFG based on each subsidiary’s contribution to amounts due under AFG’s consolidated tax return.

Subsidiary Liquidity   Great American Life Insurance Company (“GALIC”), a wholly-owned annuity subsidiary, is a member of the Federal Home Loan Bank of Cincinnati (“FHLB”). The FHLB makes advances and provides other banking services to member institutions, which provides the annuity operations with an additional source of liquidity. At December 31, 2017, GALIC had $871 million in outstanding advances from the FHLB (included in annuity benefits accumulated), bearing interest at rates ranging from 0.03% to 0.35% over LIBOR (average rate of 1.75% at December 31, 2017). While these advances must be repaid between 2018 and 2020 ($285 million in 2018 and $586 million in 2020), GALIC has the option to prepay all or a portion of the advances. GALIC has invested the proceeds from the advances in fixed maturity securities with similar expected lives as the advances for the purpose of earning a spread over the interest payments due to the FHLB. At December 31, 2017, GALIC estimated that it had additional borrowing capacity of approximately $300 million from the FHLB.

The liquidity requirements of AFG’s insurance subsidiaries relate primarily to the liabilities associated with their products as well as operating costs and expenses, payments of dividends and taxes to AFG and contributions of capital to their subsidiaries. Historically, cash flows from premiums and investment income have generally provided more than sufficient funds to meet these requirements. Funds received in excess of cash requirements are generally invested in additional marketable securities. In addition, the insurance subsidiaries generally hold a significant amount of highly liquid, short-term investments.

The excess cash flow of AFG’s property and casualty group allows it to extend the duration of its investment portfolio somewhat beyond that of its claim reserves.

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In the annuity business, where profitability is largely dependent on earning a spread between invested assets and annuity liabilities, the duration of investments is generally maintained close to that of liabilities. In a rising interest rate environment, significant protection from withdrawals exists in the form of temporary and permanent surrender charges on AFG’s annuity products. With declining rates, AFG receives some protection (from spread compression) due to the ability to lower crediting rates, subject to contractually guaranteed minimum interest rates (“GMIRs”). AFG began selling policies with GMIRs below 2% in 2003; almost all new business since late 2010 has been issued with a 1% GMIR. At December 31, 2017, AFG could reduce the average crediting rate on approximately $25 billion of traditional fixed and fixed-indexed annuities without guaranteed withdrawal benefits by approximately 92 basis points (on a weighted average basis). Annuity policies are subject to GMIRs at policy issuance. The table below shows the breakdown of annuity reserves by GMIR. The current interest crediting rates on substantially all of AFG’s annuities with a GMIR of 3% or higher are at their minimum.

	% of Reserves
	at December 31,
GMIR	2017	2016	2015
1 — 1.99%	76%	72%	67%
2 — 2.99%	5%	6%	7%
3 — 3.99%	10%	12%	14%
4.00% and above	9%	10%	12%
Annuity benefits accumulated (in millions)	$33,316	$29,907	$26,662

For statutory accounting purposes, equity securities of non-affiliates and equity call options used in the fixed-indexed annuity business are generally carried at fair value. At December 31, 2017, AFG’s insurance companies owned publicly traded equity securities with a fair value of $1.61 billion and equity call options with a fair value of $701 million. Decreases in market prices could adversely affect the insurance group’s capital, potentially impacting the amount of dividends available or necessitating a capital contribution. Conversely, increases in market prices could have a favorable impact on the group’s dividend-paying capability.

AFG believes its insurance subsidiaries maintain sufficient liquidity to pay claims and benefits and operating expenses. In addition, these subsidiaries have sufficient capital to meet commitments in the event of unforeseen events such as reserve deficiencies, inadequate premium rates or reinsurer insolvencies. Nonetheless, changes in statutory accounting rules, significant declines in the fair value of the insurance subsidiaries’ investment portfolios or significant ratings downgrades on these investments, could create a need for additional capital.

Condensed Parent Only Cash Flows   AFG’s parent holding company only condensed cash flows from operating, investing and financing activities are shown below (in millions):

	Year ended December 31,
	2017			2016			2015
Net cash provided by operating activities	$	578		$	555		$	162
Net cash used in investing activities	(63		)	(560		)	(33		)
Net cash provided by (used in) financing activities	(413		)	13			(232		)
Net change in cash and cash equivalents	$	102		$	8		$	(103	)

Parent Net Cash Provided by Operating Activities   Parent holding company cash flows from operating activities consist primarily of dividends and tax payments received from AFG’s insurance subsidiaries, reduced by tax payments to the IRS and holding company interest and other expenses. Parent holding company net cash provided by operating activities was $578 million in 2017 compared to $555 million in 2016 and $162 million in 2015. The $23 million increase in net cash provided by operating activities in 2017 as compared to 2016 was due to lower taxes paid, partially offset by lower dividends received from subsidiaries for those comparable periods. Higher dividends received from subsidiaries in 2016 as compared to 2015 were the primary driver of the $393 million increase in net cash provided by operating activities.

Parent Net Cash Used in Investing Activities   Parent holding company investing activities consist of capital contributions to and returns of capital from subsidiaries and, to a much lesser extent, parent company investment activity. Parent holding company net cash used in investing activities was $63 million in 2017 compared to $560 million in 2016 and $33 million in 2015. The $63 million in net cash used in investing activities in 2017 and $33 million in 2015 are significantly lower than the $560 million in net cash used in investing activities in 2016 due primarily to capital contributions to a subsidiary to fund the acquisition of the noncontrolling interest in National Interstate Corporation.

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Parent Net Cash Provided by (Used in) Financing Activities   Parent company financing activities consist primarily of repurchases of AFG Common Stock, dividends to shareholders, the issuance and retirement of long-term debt and, to a lesser extent, proceeds from employee stock option exercises. Significant long-term debt and common stock transactions are discussed above under “Parent Holding Company Liquidity.” Parent holding company net cash used in financing activities was $413 million in 2017 compared to net cash provided by financing activities of $13 million in 2016 and net cash used in financing activities of $232 million in 2015. The $426 million increase in cash used in financing activities in 2017 as compared to 2016 reflects higher net redemptions of long-term debt in 2017 and increased dividends (due primarily to special dividends of $3.50 per share in 2017 compared to $1.00 per share in 2016), partially offset by the absence of American Financial Group, Inc. Common Stock repurchases in 2017. The $245 million increase in net cash provided by financing activities in 2016 as compared to 2015 primarily reflects proceeds from additional long-term borrowings.

Contractual Obligations The following table shows an estimate (based on historical patterns and expected trends) of payments to be made for insurance reserve liabilities, as well as scheduled payments for major contractual obligations (in millions).

	Total		Within One Year		2-3 Years		4-5 Years		More than 5 Years
Annuities (a)	$	38,653	$	2,655	$	6,552	$	8,464	$	20,982
Life, accident and health liabilities (a)	1,449		123		209		197		920
Property and casualty unpaid losses and loss adjustment expenses (b)	9,678		2,600		2,500		1,100		3,478
Long-term debt, including interest	2,922		60		120		120		2,622
Operating leases	346		63		107		76		100
Total	$	53,048	$	5,501	$	9,488	$	9,957	$	28,102

(a) Amounts presented in the table represent estimated cash payments under such contracts, based on significant assumptions related to mortality, morbidity, lapse, renewal, retirement and annuitization. These assumptions also include interest and index crediting consistent with assumptions used to amortize DPAC and assess loss recognition. All estimated cash payments are undiscounted for the time value of money. As a result, total outflows for all years exceed the corresponding liabilities of $33.32 billion for annuity benefits accumulated and $658 million for life, accident and health reserves included in AFG’s Balance Sheet as of December 31, 2017. Based on the same assumptions, AFG projects reinsurance recoveries related to life, accident and health reserves totaling $708 million as follows: Within 1 year — $68 million; 2-3 years — $124 million; 4-5 years — $96 million; and thereafter — $420 million. Actual payments and their timing could differ significantly from these estimates.

(b) Dollar amounts and time periods are estimates based on historical net payment patterns applied to the gross reserves and do not represent actual contractual obligations. Based on the same assumptions, AFG projects reinsurance recoveries related to these reserves totaling $2.96 billion as follows: Within 1 year — $800 million; 2-3 years — $800 million; 4-5 years — $300 million; and thereafter — $1.06 billion. Actual payments and their timing could differ significantly from these estimates.

AFG has no material contractual purchase obligations or other long-term liabilities at December 31, 2017.

Off-Balance Sheet Arrangements   See Note P — “Additional Information— Financial Instruments — Unfunded Commitments” to the financial statements.

Investments   AFG attempts to optimize investment income while building the value of its portfolio, placing emphasis upon total long-term performance.

AFG’s investment portfolio at December 31, 2017, contained $38.38 billion in fixed maturity securities and $1.60 billion in equity securities classified as available for sale and carried at fair value with unrealized gains and losses included in a separate component of shareholders’ equity on an after-tax basis. In addition, $348 million in fixed maturities and $62 million in equity securities were classified as trading with changes in unrealized holding gains or losses included in net investment income.

As detailed in Note E — “Investments — Net Unrealized Gain on Marketable Securities” to the financial statements, unrealized gains and losses on AFG’s fixed maturity and equity securities are included in shareholders’ equity after adjustments for related changes in DPAC and certain liabilities related to annuity, long-term care and life businesses, noncontrolling interests and deferred income taxes. DPAC and certain other balance sheet amounts applicable to annuity, long-term care and life businesses are adjusted for the impact of unrealized gains or losses on investments as if these gains or losses had been realized, with

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corresponding increases or decreases (net of tax) included in accumulated other comprehensive income in AFG’s Balance Sheet.

Fixed income investment funds are generally invested in securities with intermediate-term maturities with an objective of optimizing total return while allowing flexibility to react to changes in market conditions. At December 31, 2017, the average life of AFG’s fixed maturities was about 6-1/2 years.

Fair values for AFG’s portfolio are determined by AFG’s internal investment professionals using data from nationally recognized pricing services as well as non-binding broker quotes. Fair values of equity securities are generally based on published closing prices. For mortgage-backed securities (“MBS”), which comprise approximately 11% of AFG’s fixed maturities, prices for each security are generally obtained from both pricing services and broker quotes. For the remainder of AFG’s fixed maturity portfolio, approximately 76% are priced using pricing services and the balance is priced primarily by using non-binding broker quotes. When prices obtained for the same security vary, AFG’s internal investment professionals select the price they believe is most indicative of an exit price.

The pricing services use a variety of observable inputs to estimate fair value of fixed maturities that do not trade on a daily basis. Based upon information provided by the pricing services, these inputs include, but are not limited to, recent reported trades, benchmark yields, issuer spreads, bids or offers, reference data, and measures of volatility. Included in the pricing of MBS are estimates of the rate of future prepayments and defaults of principal over the remaining life of the underlying collateral. Due to the lack of transparency in the process that brokers use to develop prices, valuations that are based on brokers’ prices are classified as Level 3 in the GAAP hierarchy unless the price can be corroborated, for example, by comparison to similar securities priced using observable inputs.

Valuation techniques utilized by pricing services and prices obtained from external sources are reviewed by AFG’s internal investment professionals who are familiar with the securities being priced and the markets in which they trade to ensure the fair value determination is representative of an exit price. To validate the appropriateness of the prices obtained, these investment managers consider widely published indices (as benchmarks), recent trades, changes in interest rates, general economic conditions and the credit quality of the specific issuers. In addition, AFG communicates directly with pricing services regarding the methods and assumptions used in pricing, including verifying, on a test basis, the inputs used by the services to value specific securities.

In general, the fair value of AFG’s fixed maturity investments is inversely correlated to changes in interest rates. The following table demonstrates the sensitivity of such fair values to reasonably likely changes in interest rates by illustrating the estimated effect on AFG’s fixed maturity portfolio and accumulated other comprehensive income that an immediate increase of 100 basis points in the interest rate yield curve would have at December 31, 2017 (dollars in millions). Effects of increases or decreases from the 100 basis points illustrated would be approximately proportional.

Fair value of fixed maturity portfolio	$	38,727
Percentage impact on fair value of 100 bps increase in interest rates	(5.0		%)
Pretax impact on fair value of fixed maturity portfolio	$	(1,936	)
Offsetting adjustments to deferred policy acquisition costs and other balance sheet amounts	750
Estimated pretax impact on accumulated other comprehensive income	(1,186		)
Deferred income tax	249
Estimated after-tax impact on accumulated other comprehensive income	$	(937	)

Approximately 90% of the fixed maturities held by AFG at December 31, 2017, were rated “investment grade” (credit rating of AAA to BBB) by nationally recognized rating agencies. Investment grade securities generally bear lower yields and lower degrees of risk than those that are unrated and non-investment grade. Management believes that the high quality investment portfolio should generate a stable and predictable investment return.

MBS are subject to significant prepayment risk due to the fact that, in periods of declining interest rates, mortgages may be repaid more rapidly than scheduled as borrowers refinance higher rate mortgages to take advantage of lower rates. Although interest rates have been low in recent years, tighter lending standards have resulted in fewer buyers being able to refinance the mortgages underlying much of AFG’s non-agency residential MBS portfolio.

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Summarized information for AFG’s MBS (including those classified as trading) at December 31, 2017, is shown in the table below (dollars in millions). Agency-backed securities are those issued by a U.S. government-backed agency; Alt-A mortgages are those with risk profiles between prime and subprime. The average life of the residential and commercial MBS is approximately 4-1/2 years and 5-1/2 years, respectively.

	Amortized Cost		Fair Value		Fair Value as % of Cost		Unrealized Gain (Loss)			% Rated Investment Grade
Collateral type
Residential:
Agency-backed	$	207	$	205	99	%	$	(2	)	100	%
Non-agency prime	1,218		1,386		114	%	168			27	%
Alt-A	994		1,122		113	%	128			15	%
Subprime	468		517		110	%	49			19	%
Commercial	928		963		104	%	35			95	%
	$	3,815	$	4,193	110	%	$	378		42	%

The National Association of Insurance Commissioners (“NAIC”) assigns creditworthiness designations on a scale of 1 to 6 with 1 being the highest quality and 6 being the lowest quality. The NAIC retains third-party investment management firms to assist in the determination of appropriate NAIC designations for MBS based not only on the probability of loss (which is the primary basis of ratings by the major ratings firms), but also on the severity of loss and statutory carrying value. At December 31, 2017, 97% (based on statutory carrying value of $3.75 billion) of AFG’s MBS had an NAIC designation of 1.

Municipal bonds represented approximately 18% of AFG’s fixed maturity portfolio at December 31, 2017. AFG’s municipal bond portfolio is high quality, with 99% of the securities rated investment grade at that date. The portfolio is well diversified across the states of issuance and individual issuers. At December 31, 2017, approximately 77% of the municipal bond portfolio was held in revenue bonds, with the remaining 23% held in general obligation bonds. AFG does not own general obligation bonds issued by Puerto Rico.

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Summarized information for the unrealized gains and losses recorded in AFG’s Balance Sheet at December 31, 2017, is shown in the following table (dollars in millions). Approximately $767 million of available for sale fixed maturity securities and $79 million of available for sale equity securities had no unrealized gains or losses at December 31, 2017.

	Securities With Unrealized Gains			Securities With Unrealized Losses
Available for Sale Fixed Maturities
Fair value of securities	$	31,743		$	5,869
Amortized cost of securities	$	30,320		$	5,951
Gross unrealized gain (loss)	$	1,423		$	(82	)
Fair value as % of amortized cost	105		%	99		%
Number of security positions	4,354			841
Number individually exceeding $2 million gain or loss	82			1
Concentration of gains (losses) by type or industry (exceeding 5% of unrealized):
Mortgage-backed securities	$	385		$	(7	)
States and municipalities	254			(18		)
Banks, savings and credit institutions	167			(5		)
Asset-backed securities	142			(16		)
Manufacturing	107			(9		)
Insurance companies	76			(3		)
Percentage rated investment grade	90		%	90		%
Available for Sale Equity Securities
Fair value of securities	$	1,350		$	171
Cost of securities	$	1,048		$	194
Gross unrealized gain (loss)	$	302		$	(23	)
Fair value as % of cost	129		%	88		%
Number of security positions	172			23
Number individually exceeding $2 million gain or loss	36			4

The table below sets forth the scheduled maturities of AFG’s available for sale fixed maturity securities at December 31, 2017, based on their fair values. Securities with sinking funds are reported at average maturity. Actual maturities may differ from contractual maturities because certain securities may be called or prepaid by the issuers.

	Securities With Unrealized Gains		Securities With Unrealized Losses
Maturity
One year or less	2	%	2	%
After one year through five years	18	%	20	%
After five years through ten years	37	%	31	%
After ten years	12	%	16	%
	69	%	69	%
Asset-backed securities (average life of approximately 5 years)	19	%	26	%
Mortgage-backed securities (average life of approximately 4-1/2 years)	12	%	5	%
	100	%	100	%

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The table below (dollars in millions) summarizes the unrealized gains and losses on fixed maturity securities by dollar amount:

	Aggregate Fair Value		Aggregate Unrealized Gain (Loss)			Fair Value as % of Cost
Fixed Maturities at December 31, 2017
Securities with unrealized gains:
Exceeding $500,000 (829 securities)	$	12,450	$	923		108	%
$500,000 or less (3,525 securities)	19,293		500			103	%
	$	31,743	$	1,423		105	%
Securities with unrealized losses:
Exceeding $500,000 (26 securities)	$	583	$	(24	)	96	%
$500,000 or less (815 securities)	5,286		(58		)	99	%
	$	5,869	$	(82	)	99	%

The following table (dollars in millions) summarizes the unrealized losses for all securities with unrealized losses by issuer quality and the length of time those securities have been in an unrealized loss position:

	Aggregate Fair Value		Aggregate Unrealized Loss			Fair Value as % of Cost
Securities with Unrealized Losses at December 31, 2017
Investment grade fixed maturities with losses for:
Less than one year (489 securities)	$	3,940	$	(32	)	99	%
One year or longer (230 securities)	1,342		(32		)	98	%
	$	5,282	$	(64	)	99	%
Non-investment grade fixed maturities with losses for:
Less than one year (75 securities)	$	355	$	(5	)	99	%
One year or longer (47 securities)	232		(13		)	95	%
	$	587	$	(18	)	97	%
Common stocks with losses for:
Less than one year (16 securities)	$	117	$	(22	)	84	%
One year or longer (none)	—		—			—	%
	$	117	$	(22	)	84	%
Perpetual preferred stocks with losses for:
Less than one year (4 securities)	$	41	$	—		100	%
One year or longer (3 securities)	13		(1		)	93	%
	$	54	$	(1	)	98	%

When a decline in the value of a specific investment is considered to be other-than-temporary, a provision for impairment is charged to earnings (accounted for as a realized loss) and the cost basis of that investment is reduced by the amount of the charge. The determination of whether unrealized losses are other-than-temporary requires judgment based on subjective as well as objective factors.Factors considered and resources used by management include:

a) whether the unrealized loss is credit-driven or a result of changes in market interest rates,

b) the extent to which fair value is less than cost basis,

c) cash flow projections received from independent sources,

d) historical operating, balance sheet and cash flow data contained in issuer SEC filings and news releases,

e) near-term prospects for improvement in the issuer and/or its industry,

f) third party research and communications with industry specialists,

g) financial models and forecasts,

h) the continuity of dividend payments, maintenance of investment grade ratings and hybrid nature of certain investments,

i) discussions with issuer management, and

j) ability and intent to hold the investment for a period of time sufficient to allow for anticipated recovery in fair value.

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Based on its analysis of the factors listed above, management believes AFG will recover its cost basis in the securities with unrealized losses and that AFG has the ability to hold the securities until they recover in value and had no intent to sell them at December 31, 2017. Although AFG has the ability to continue holding its investments with unrealized losses, its intent to hold them may change due to deterioration in the issuers’ creditworthiness, decisions to lessen exposure to a particular issuer or industry, asset/liability management decisions, market movements, changes in views about appropriate asset allocation or the desire to offset taxable realized gains. Should AFG’s ability or intent change with regard to a particular security, a charge for impairment would likely be required. While it is not possible to accurately predict if or when a specific security will become impaired, charges for other-than-temporary impairment could be material to results of operations in future periods. Significant declines in the fair value of AFG’s investment portfolio could have a significant adverse effect on AFG’s liquidity. For information on AFG’s realized gains (losses) on securities, including charges for other-than-temporary impairment, see “Results of Operations — Consolidated Realized Gains (Losses) on Securities.”

As discussed in Note A — “Accounting Policies — Investments” to the financial statements, effective January 1, 2018, all equity securities currently classified as “available for sale” will be required to be carried at fair value through net earnings instead of accumulated other comprehensive income and will therefore no longer be evaluated for other-than-temporary impairment.

Uncertainties    As more fully explained in the following paragraphs, management believes that the areas posing the greatest risk of material loss are the adequacy of its insurance reserves and contingencies arising out of its former railroad and manufacturing operations.

Property and Casualty Insurance Reserves   Estimating the liability for unpaid losses and loss adjustment expenses (“LAE”) is inherently judgmental and is influenced by factors that are subject to significant variation. Determining the liability is a complex process incorporating input from many areas of the Company including actuarial, underwriting, pricing, claims and operations management.

The estimates of liabilities for unpaid claims and for expenses of investigation and adjustment of unpaid claims are based upon: (i) the accumulation of case estimates for losses reported prior to the close of the accounting periods on direct business written (“case reserves”); (ii) estimates received from ceding reinsurers and insurance pools and associations; (iii) estimates of claims incurred but not reported or “IBNR” (including possible development on known claims); (iv) estimates (based on experience) of expense for investigating and adjusting claims; and (v) the current state of law and coverage litigation.

The process used to determine the total reserve for liabilities involves estimating the ultimate incurred losses and LAE, adjusted for amounts already paid on the claims. The IBNR reserve is derived by first estimating the ultimate unpaid reserve liability and subtracting case reserves for loss and LAE. See Note O — “Insurance — Property and Casualty Insurance Reserves” to the financial statements for a discussion of the factors considered and actuarial methods used in determining management’s best estimate of the ultimate liability for unpaid losses and LAE.

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The following table shows (in millions) the breakdown of AFG’s property and casualty insurance reserves between case reserves, IBNR reserves and LAE reserves (estimated amounts required to adjust, record and settle claims, other than the claim payments themselves) at December 31, 2017 and gross written premiums for the year ended December 31, 2017.

	Gross Loss Reserves
	Case			IBNR		LAE		Total Reserves			Gross Written Premiums
Statutory Line of Business
Other liability — occurrence	$	657		$	1,700	$	426	$	2,783		$	969
Workers’ compensation	1,048			1,352		342		2,742			1,333
Other liability — claims made	165			302		216		683			397
Special property (fire, allied lines, inland marine, earthquake)	432			165		30		627			1,410
Commercial auto/truck liability/medical	212			298		91		601			427
Products liability — occurrence	78			147		141		366			134
Commercial multi-peril	182			108		73		363			273
Other lines	183			311		97		591			1,025
Total Statutory	2,957			4,383		1,416		8,756			5,968
Adjustments for GAAP:
Foreign operations	357			506		38		901			498
Deferred gains on retroactive reinsurance	—			40		—		40			—
Loss reserve discounting	(10		)	—		—		(10		)	—
Other	(9		)	—		—		(9		)	36
Total Adjustments for GAAP	338			546		38		922			534
Total GAAP Reserves and Premiums	$	3,295		$	4,929	$	1,454	$	9,678		$	6,502

While current factors and reasonably likely changes in variable factors are considered in estimating the liability for unpaid losses, there is no method or system that can eliminate the risk of actual ultimate results differing from such estimates.

Following is a discussion of certain critical variables affecting the estimation of loss reserves of the more significant long-tail lines of business (asbestos and environmental liabilities are separately discussed below). Many other variables may also impact ultimate claim costs.

An important assumption underlying reserve estimates is that the cost trends implicitly built into development patterns will continue into the future. However, future results could vary due to an unexpected change in the underlying cost trends. This unexpected change could arise from a variety of sources including a general increase in economic inflation, inflation from social programs, new medical technologies, or other factors such as those listed below in connection with AFG’s largest lines of business. It is not possible to isolate and measure the potential impact of just one of these variables, and future cost trends could be partially impacted by several such variables. However, it is reasonable to address the sensitivity of the reserves to potential impact from changes in these variables by measuring the effect of a possible overall 1% change in future cost trends that may be caused by one or more variables. Utilizing the effect of a 1% change in overall cost trends enables changes greater than 1% to be estimated by extrapolation. Each additional 1% change in the cost trend would increase the effect on net earnings by an amount slightly (about 4%) greater than the effect of the previous 1%. For example, if a 1% change in cost trends in a line of business would change net earnings by $20 million, a 2% change would change net earnings by approximately $41 million.

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The estimated cumulative impact that a 1% change in cost trends in AFG’s more significant lines of property and casualty business (exceeding 5% of total reserves) would have on net earnings is shown below (in millions).

Line of business	Effect of 1% Change in Cost Trends
Other liability — occurrence	$	37
Workers’ compensation	75
Other liability — claims made	10
Commercial auto/truck liability/medical	10

The judgments and uncertainties surrounding management’s reserve estimation process and the potential for reasonably possible variability in management’s most recent reserve estimates may also be viewed by looking at how recent historical estimates of reserves have developed. The following table shows (dollars in millions) what the impact on AFG’s net earnings would be on the more significant lines of business if the December 31, 2017, reserves (net of reinsurance) developed at the same rate as the average development of the most recent five years.

	5-yr. Average Development (a)(b)		Net Reserves (b) December 31, 2017		Effect on Net Earnings (b)
Other liability — occurrence	1.3	%	$	1,094	$	(14	)
Workers’ compensation	(2.1	%)	2,317		49
Other liability — claims made	(3.3	%)	498		16
Commercial auto/truck liability/medical	4.7	%	449		(21		)

(a) Adverse (favorable), net of tax effect.

(b) Excludes asbestos and environmental liabilities.

The following discussion describes key assumptions and important variables that affect the estimate of the reserve for loss and loss adjustment expenses of the more significant lines of business and explains what caused them to change from assumptions used in the preceding period.

Other Liability — Occurrence

This long-tail line of business consists of coverages protecting the insured against legal liability resulting from negligence, carelessness, or a failure to act causing property damage or personal injury to others. Some of the important variables affecting estimation of loss reserves for other liability — occurrence include:

• Litigious climate

• Unpredictability of judicial decisions regarding coverage issues

• Magnitude of jury awards

• Outside counsel costs

• Timing of claims reporting

AFG recorded adverse prior year reserve development of $37 million in 2017 related to its other liability — occurrence coverage due to continued severity increases in New York contractor claims, as well as increased claim severity across other excess and umbrella liability coverages and general liability coverages. AFG recorded adverse prior year reserve development of $61 million in 2016 due primarily to increased severity in New York contractor claims. AFG recorded favorable prior year reserve development of $7 million in 2015 as both the frequency and severity of claims in excess and umbrella liability coverages were lower than previously projected.

While management applies the actuarial methods mentioned above, more judgment is involved in arriving at the final reserve to be held. For recent accident years, more weight is given to the Bornhuetter-Ferguson method.

Workers’ Compensation

This long-tail line of business provides coverage to employees who may be injured in the course of employment. Some of the important variables affecting estimation of loss reserves for workers’ compensation include:

• Legislative actions and regulatory and legal interpretations

• Future medical cost inflation

• Economic conditions

• Frequency of reopening claims previously closed

• Advances in medical equipment and processes

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• Pace and intensity of employee rehabilitation

• Changes in the use of pharmaceutical drugs

• Changes in longevity trends for permanently injured workers

Approximately 25% and 24% of AFG’s workers’ compensation reserves at December 31, 2017 relate to policies written in Florida and California, respectively. The Castellanos v. Next Door Company decision in Florida and the implementation of Senate Bill 863 in California are two examples of recent changes that impacted the workers’ compensation operating environment and added difficulty and uncertainty to the estimation of related liabilities.

AFG recorded favorable prior year reserve development of $79 million in 2017 related to its workers’ compensation coverage due to lower than anticipated claim severity and improving claim closure rates, particularly in the southeastern United States and California. AFG recorded favorable prior year reserve development of $85 million in 2016 due to lower than anticipated claim severity and improving claim closure rates. AFG recorded favorable prior year reserve development of $45 million in 2015 due to lower than anticipated claim severity across all regions of the country.

Other Liability — Claims Made

This long-tail line of business consists mostly of directors’ and officers’ liability (“D&O”). Some of the important variables affecting estimation of loss reserves for other liability — claims made include:

• Litigious climate

• Economic conditions

• Variability of stock prices

• Magnitude of jury awards

The general state of the economy and the variability of the stock price of the insured can affect the frequency and severity of shareholder class action suits and other situations that trigger coverage under D&O policies. For example, from 2008 to 2010, economic conditions led to higher frequency of claims, particularly in the D&O policies for small account and not-for-profit organizations. Since then, claim frequency has consistently decreased from its peak in 2010, offsetting increased claim severity.

AFG recorded favorable prior year reserve development of $5 million in 2017, $24 million in 2016 and $12 million in 2015 on its D&O business as claim severity was less than expected across several prior accident years.

Commercial Auto/Truck Liability/Medical

This line of business is a mix of coverage protecting the insured against legal liability for property damage or personal injury to others arising from the operation of commercial motor vehicles. The property damage liability exposure is usually short-tail with relatively quick reporting and settlement of claims. The bodily injury and medical payments exposures are longer-tailed; although the claim reporting is relatively quick, the final settlement can take longer to achieve. Some of the important variables affecting estimation of loss reserves for commercial auto/truck liability/medical are similar to other liability — occurrence and include:

• Magnitude of jury awards

• Unpredictability of judicial decisions regarding coverage issues

• Litigious climate and trends

• Change in frequency of severe accidents

• Health care costs and utilization of medical services by injured parties

AFG recorded adverse prior year reserve development of $2 million in 2017, $28 million in 2016 and $20 million in 2015 for this line of business. Claim severity trends had been significantly higher than expected beginning with accident years 2010, but have more recently stabilized.

Reserves of Foreign Operations

Approximately $631 million of the $901 million in gross reserves of foreign operations relate to the operations of Neon Underwriting Limited, AFG’s wholly-owned United Kingdom-based Lloyd’s insurer. Neon writes bloodstock and livestock, cargo, cyber, financial lines, marine and energy liability, marine hull and war, mergers and acquisitions, personal accident and health, political and trade risk, professional indemnity, property and terrorism and political violence insurance.

During the second quarter of 2016, Neon completed a strategic review of its business under a new leadership team. As part of its strategic review, Neon sold and/or exited certain historical lines of business including its medical malpractice and general

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liability classes. As a result of Neon’s claims review of its exited lines of business, AFG recorded a charge of approximately $65 million, including $57 million to increase loss reserves (adverse development) primarily related to Neon’s medical malpractice and general liability lines.

In the fourth quarter of 2017, Neon entered into a reinsurance to close agreement for 2015 and prior years of account, which transfers the responsibility for all of the liabilities that attach to the transferred year of account (gross reserves of $385 million at December 31, 2017) as well as any income due to the closing year of account in return for a premium. The reinsurance to close agreement eliminates any remaining reserve volatility from years of account 2015 and prior, including all medical malpractice exposure. Going forward, significant variables in estimating Neon’s loss reserves include:

• Litigious environment

• Magnitude of court awards

• Trends in claim costs, including medical cost inflation

• Global economic conditions

As a result of the reinsurance to close transaction, Neon recorded favorable reserve development of approximately $42 million, including $24 million related to its ongoing lines of business and $18 million that relates to the exited lines of business discussed above. In addition to the prior year reserve development related to the reinsurance to close transaction and 2016 Neon exited lines charge, Neon recorded favorable prior year reserve development of $29 million in 2017 compared to adverse prior year reserve development of $21 million in 2016 and $44 million in 2015. The favorable reserve development in 2017 outside of the reinsurance to close transaction related to the retained loss reserves across all of Neon’s ongoing lines of business, particularly property lines. The adverse reserve development in 2016 outside of the exited lines charge was attributable to reserve strengthening in several lines of business, including political risk and personal accident. The adverse reserve development in 2015 was attributable to reserve strengthening in several lines of business, primarily Dutch hospital medical malpractice, Australian and other general liability and personal accident insurance.

Recoverables from Reinsurers and Availability of Reinsurance   AFG is subject to credit risk with respect to its reinsurers, as reinsurance contracts do not relieve AFG of its liability to policyholders. To mitigate this risk, substantially all reinsurance is ceded to companies with investment grade S&P ratings or is secured by “funds withheld” or other collateral.

The availability and cost of reinsurance are subject to prevailing market conditions, which are beyond AFG’s control and which may affect AFG’s level of business and profitability. Although the cost of certain reinsurance programs may increase, management believes that AFG will be able to maintain adequate reinsurance coverage at acceptable rates without a material adverse effect on AFG’s results of operations. AFG’s gross and net combined ratios are shown in the table below.

See Item 1— Business — “Property and Casualty Insurance Segment— Reinsurance” for more information on AFG’s reinsurance programs. For additional information on the effect of reinsurance on AFG’s historical results of operations see Note O— “Insurance — Reinsurance” to the financial statements.

The following table illustrates the effect that purchasing property and casualty reinsurance has had on AFG’s combined ratio over the last three years.

	2017		2016		2015
Before reinsurance (gross)	98.9	%	92.5	%	92.8	%
Effect of reinsurance	(4.2	%)	2.0	%	1.9	%
Actual (net of reinsurance)	94.7	%	94.5	%	94.7	%

Outside of its property and casualty operations, AFG also has reinsurance recoverables totaling $312 million, including $263 million related to the run-off life business. These recoverables include $223 million directly or indirectly from Hannover Life Reassurance Company of America (rated A+ by A.M. Best).

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Asbestos and Environmental-related (“A&E”) Insurance Reserves   Asbestos and environmental reserves of the property and casualty group consisted of the following (in millions):

	December 31,
	2017		2016
Asbestos	$	238	$	198
Environmental	165		139
A&E reserves, net of reinsurance recoverable	403		337
Reinsurance recoverable, net of allowance	125		106
Gross A&E reserves	$	528	$	443

Asbestos reserves include claims asserting alleged injuries and damages from exposure to asbestos. Environmental reserves include claims relating to polluted sites.

Asbestos claims against manufacturers, distributors or installers of asbestos products were presented under the products liability section of their policies, which typically had aggregate limits that capped an insurer’s liability. In recent years, a number of asbestos claims are being presented as “non-products” claims, such as those by installers of asbestos products and by property owners or operators who allegedly had asbestos on their property, under the premises or operations section of their policies. Unlike products exposures, these non-products exposures typically had no aggregate limits, creating potentially greater exposure for insurers. Further, in an effort to seek additional insurance coverage, some insureds with installation activities who have substantially eroded their products coverage are presenting new asbestos claims as non-products operations claims or attempting to reclassify previously settled products claims as non-products claims to restore a portion of previously exhausted products aggregate limits. AFG, along with other insurers, is and will be subject to such non-products claims. It is difficult to predict whether insureds will be successful in asserting claims under non-products coverage or whether AFG and other insurers will be successful in asserting additional defenses. Therefore, the future impact of such efforts is uncertain.

Approximately 42% of AFG’s net asbestos reserves relate to policies written directly by AFG subsidiaries. Claims from these policies generally are product-oriented claims with only a limited amount of non-products exposures, and are dominated by small to mid-sized commercial entities that are mostly regional policyholders with few national target defendants. The remainder is assumed reinsurance business that includes exposures for the periods 1954 to 1983. The asbestos and environmental assumed claims are ceded by various insurance companies under reinsurance treaties. A majority of the individual assumed claims have exposures of less than $100,000 to AFG. Asbestos losses assumed include some of the industry known manufacturers, distributors and installers. Pollution losses include industry known insured names and sites.

Establishing reserves for A&E claims relating to policies and participations in reinsurance treaties and former operations is subject to uncertainties that are significantly greater than those presented by other types of claims. For this group of claims, traditional actuarial techniques that rely on historical loss development trends cannot be used and a range of reasonably possible losses cannot be estimated. Case reserves and expense reserves are established by the claims department as specific policies are identified. In addition to the case reserves established for known claims, management establishes additional reserves for claims not yet known or reported and for possible development on known claims. These additional reserves are management’s best estimate based on periodic comprehensive studies and internal reviews adjusted for payments and identifiable changes, supplemented by management’s review of industry information about such claims, with due consideration to individual claim situations.

Management believes that estimating the ultimate liability for asbestos claims presents a unique and difficult challenge to the insurance industry due to, among other things, inconsistent court decisions, an increase in bankruptcy filings as a result of asbestos-related liabilities, novel theories of coverage, and judicial interpretations that often expand theories of recovery and broaden the scope of coverage. The casualty insurance industry is engaged in extensive litigation over these coverage and liability issues as the volume and severity of claims against asbestos defendants continue to increase. Environmental claims likewise present challenges in prediction, due to uncertainty regarding the interpretation of insurance policies, complexities regarding multi-party involvements at sites, evolving cleanup standards and protracted time periods required to assess the level of cleanup required at contaminated sites.

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The following factors could impact AFG’s reserves and payments:

• There is a growing interest at the state level to attempt to legislatively address asbestos liabilities and the manner in which asbestos claims are resolved. These developments are fluid and could result in piecemeal state-by-state solutions.

• The manner by which bankruptcy courts are addressing asbestos liabilities is in flux.

• AFG’s insureds may make claims alleging significant non-products exposures.

While management believes that AFG’s reserves for A&E claims are a reasonable estimate of ultimate liability for such claims, actual results may vary materially from the amounts currently recorded due to the difficulty in predicting the number of future claims, the impact of recent bankruptcy filings, and unresolved issues such as whether coverage exists, whether policies are subject to aggregate limits on coverage, how claims are to be allocated among triggered policies and implicated years, and whether claimants who exhibit no signs of illness will be successful in pursuing their claims. A 1% variation in loss cost trends, caused by any of the factors previously described, would change net earnings by approximately $35 million.

AFG tracks its A&E claims by policyholder. The following table shows, by type of claim, the number of policyholders that did not receive any payments in the calendar year separate from policyholders that did receive a payment. Policyholder counts represent policies written by AFG subsidiaries and do not include assumed reinsurance.

	2017	2016	2015
Number of policyholders with no indemnity payments:
Asbestos	81	87	122
Environmental	101	107	112
	182	194	234
Number of policyholders with indemnity payments:
Asbestos	74	66	50
Environmental	31	28	25
	105	94	75
Total	287	288	309

Amounts paid (net of reinsurance recoveries) for asbestos and environmental claims, including loss adjustment expenses, were as follows (in millions):

	2017		2016		2015
Asbestos	$	11	$	12	$	16
Environmental	12		14		13
Total	$	23	$	26	$	29

The survival ratio is a measure often used by industry analysts to compare A&E reserves strength among companies. This ratio is typically calculated by dividing reserves for A&E exposures by the three-year average of paid losses, and therefore measures the number of years that it would take to pay off current reserves based on recent average payments. Because this ratio can be significantly impacted by a number of factors such as loss payout variability, caution should be exercised in attempting to determine reserve adequacy based simply on the survival ratio. At December 31, 2017, the property and casualty insurance segment’s three-year survival ratios compare favorably with industry survival ratios published by A.M. Best (as of December 31, 2016) as detailed in the following table:

	Property and Casualty Insurance Reserves
	Three-Year Survival Ratio (% Times Paid Losses)
	Asbestos	Environmental	Total A&E
AFG (12/31/2017)	18.6	12.8	15.7
Industry (12/31/2016)	6.7	8.0	6.9

In addition to its ongoing internal monitoring of asbestos and environmental exposures, AFG has periodically conducted comprehensive external studies of its asbestos and environmental reserves relating to the run-off operations of its property and casualty insurance segment and exposures related to its former railroad and manufacturing operations with the aid of specialty actuarial, engineering and consulting firms and outside counsel, generally every two years, with an in-depth internal review during the intervening years.

As a result of the comprehensive external study completed in the third quarter of 2017, AFG’s property and casualty insurance segment recorded an $89 million pretax special charge to increase its asbestos reserves by $53 million (net of reinsurance) and

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its environmental reserves by $36 million (net of reinsurance). Over the past few years, the focus of AFG’s asbestos claims litigation has shifted to smaller companies and companies with ancillary exposures. AFG’s insureds with these exposures have been the driver of the property and casualty insurance segment’s asbestos reserve increases in recent years. AFG is seeing modestly increasing estimates for indemnity and defense compared to prior studies. Overall, the rate of new asbestos cases received is down modestly, however, increasing life expectancies in the U.S. have allowed more time for the impacts of asbestos exposure to emerge. AFG’s comprehensive external study incorporates, among other factors, the increase in projected industry ultimate losses attributable to asbestos exposures, as well as revised estimates for future claims emergence, which has resulted in an increase in AFG’s provision for future asbestos claims.

The increase in property and casualty environmental reserves was primarily associated with updated estimates of site investigation costs with respect to existing sites and newly identified sites. AFG is seeing increased legal defense costs in environmental claims generally, as well as a number of claims and sites where the estimated investigation and remediation costs have increased. Certain individual claims are taking a longer time to settle than originally estimated, causing AFG to increase its reserves to reflect related increased costs. As in past years, there were no new or emerging broad industry trends that were identified in this study.

An in-depth internal review of AFG’s A&E reserves was completed in the third quarter of 2016 by AFG’s internal A&E claims specialists and actuaries in consultation with specialty outside counsel and an outside consultant. As a result of the review, AFG’s property and casualty insurance segment recorded a $36 million pretax special charge to increase its asbestos reserves by $5 million (net of reinsurance) and its environmental reserves by $31 million (net of reinsurance). The increase in property and casualty asbestos reserves was due primarily to increased estimates for indemnity and defense costs. The increase in property and casualty environmental reserves was attributed primarily to increased defense costs and a number of claims and sites where the estimated investigation and remediation costs have increased.

As a result of the comprehensive external study completed in the third quarter of 2015, AFG’s property and casualty insurance segment recorded a $67 million pretax special charge to increase its asbestos reserves by $25 million (net of reinsurance) and its environmental reserves by $42 million (net of reinsurance). The increase in property and casualty asbestos reserves was attributed to increased estimates for indemnity and defense costs. The increase in property and casualty environmental reserves was attributed primarily to increased defense costs and a number of claims where the estimated costs of remediation have increased.

Contingencies related to Subsidiaries’ Former Operations   The A&E studies and reviews discussed above encompassed reserves for various environmental and occupational injury and disease claims and other contingencies arising out of the railroad operations disposed of by American Premier’s predecessor and certain manufacturing operations disposed of by American Premier and its subsidiaries and by Great American Financial Resources, Inc. Charges resulting from the A&E study and reviews were $24 million in 2017, $5 million in 2016 and $12 million in 2015. For a discussion of the charges recorded for those operations, see “Results of Operations — Holding Company, Other and Unallocated.” Liabilities for claims and contingencies arising from these former railroad and manufacturing operations totaled $90 million at December 31, 2017. For a discussion of the uncertainties in determining the ultimate liability, see Note M — “Contingencies” to the financial statements.

Run-off Long-term Care Insurance   In December 2015, AFG completed the sale of United Teacher Associates Insurance Company and Continental General Insurance Company, the legal entities containing substantially all of its run-off long-term care insurance business, to HC2 Holdings, Inc. (“HC2”) for approximately $13 million in net proceeds. AFG may also receive up to $13 million of additional proceeds from HC2 in the future contingent upon the release of certain statutory-basis liabilities of the legal entities sold by AFG. In connection with obtaining regulatory approval for the transaction, AFG agreed to provide up to an aggregate of $35 million of capital support for the insurance companies, on an as-needed basis to maintain specified surplus levels, subject to immediate reimbursement by HC2 through a five-year capital maintenance agreement. With the completion of this sale, AFG divested substantially all of its long-term care business (96% as measured by net statutory reserves as of November 30, 2015) and retained only a small block of long-term care insurance (1,600 policies) with approximately $39 million of reserves at December 31, 2017. AFG will continue to accept renewal premiums on its remaining outstanding policies, which are guaranteed renewable.

44

MANAGED INVESTMENT ENTITIES

Accounting standards require AFG to consolidate its investments in collateralized loan obligation (“CLO”) entities that it manages and owns an interest in (in the form of debt). See Note A — “Accounting Policies— Managed Investment Entities” and Note H— “Managed Investment Entities” to the financial statements. The effect of consolidating these entities is shown in the tables below (in millions). The “Before CLO Consolidation” columns include AFG’s investment and earnings in the CLOs on an unconsolidated basis.

45

CONDENSED CONSOLIDATING BALANCE SHEET

	Before CLO Consolidation		Managed Investment Entities		Consol. Entries				Consolidated As Reported
December 31, 2017
Assets:
Cash and investments	$	46,262	$	—	$	(214	)	(a)	$	46,048
Assets of managed investment entities	—		4,902		—				4,902
Other assets	9,709		—		(1		)	(a)	9,708
Total assets	$	55,971	$	4,902	$	(215	)		$	60,658
Liabilities:
Unpaid losses and loss adjustment expenses and unearned premiums	$	12,088	$	—	$	—			$	12,088
Annuity, life, accident and health benefits and reserves	33,974		—		—				33,974
Liabilities of managed investment entities	—		4,902		(215		)	(a)	4,687
Long-term debt and other liabilities	4,575		—		—				4,575
Total liabilities	50,637		4,902		(215		)		55,324
Redeemable noncontrolling interests	3		—		—				3
Shareholders’ equity:
Common Stock and Capital surplus	1,269		—		—				1,269
Retained earnings	3,248		—		—				3,248
Accumulated other comprehensive income, net of tax	813		—		—				813
Total shareholders’ equity	5,330		—		—				5,330
Noncontrolling interests	1		—		—				1
Total equity	5,331		—		—				5,331
Total liabilities and equity	$	55,971	$	4,902	$	(215	)		$	60,658
December 31, 2016
Assets:
Cash and investments	$	41,649	$	—	$	(216	)	(a)	$	41,433
Assets of managed investment entities	—		4,765		—				4,765
Other assets	8,874		—		—			(a)	8,874
Total assets	$	50,523	$	4,765	$	(216	)		$	55,072
Liabilities:
Unpaid losses and loss adjustment expenses and unearned premiums	$	10,734	$	—	$	—			$	10,734
Annuity, life, accident and health benefits and reserves	30,598		—		—				30,598
Liabilities of managed investment entities	—		4,760		(211		)	(a)	4,549
Long-term debt and other liabilities	4,272		—		—				4,272
Total liabilities	45,604		4,760		(211		)		50,153
Shareholders’ equity:
Common Stock and Capital surplus	1,198		5		(5		)		1,198
Retained earnings	3,343		—		—				3,343
Accumulated other comprehensive income, net of tax	375		—		—				375
Total shareholders’ equity	4,916		5		(5		)		4,916
Noncontrolling interests	3		—		—				3
Total equity	4,919		5		(5		)		4,919
Total liabilities and equity	$	50,523	$	4,765	$	(216	)		$	55,072

(a) Elimination of the fair value of AFG’s investment in CLOs and related accrued interest.

46

CONDENSED CONSOLIDATING STATEMENT OF EARNINGS

	Before CLO Consolidation (a)			Managed Investment Entities		Consol. Entries				Consolidated As Reported
Three months ended December 31, 2017
Revenues:
Insurance net earned premiums	$	1,230		$	—	$	—			$	1,230
Net investment income	472			—		(7		)	(b)	465
Realized gains on securities	6			—		—				6
Income of managed investment entities:
Investment income	—			55		—				55
Gain on change in fair value of assets/liabilities	—			—		—			(b)	—
Other income	56			—		(4		)	(c)	52
Total revenues	1,764			55		(11		)		1,808
Costs and Expenses:
Insurance benefits and expenses	1,340			—		—				1,340
Expenses of managed investment entities	—			54		(10		)	(b)(c)	44
Interest charges on borrowed money and other expenses	157			—		—				157
Total costs and expenses	1,497			54		(10		)		1,541
Earnings before income taxes	267			1		(1		)		267
Provision for income taxes	101			—		—				101
Net earnings, including noncontrolling interests	166			1		(1		)		166
Less: Net earnings attributable to noncontrolling interests	—			—		—				—
Net earnings attributable to shareholders	$	166		$	1	$	(1	)		$	166
Three months ended December 31, 2016
Revenues:
Insurance net earned premiums	$	1,150		$	—	$	—			$	1,150
Net investment income	437			—		(8		)	(b)	429
Realized gains on securities	51			—		—				51
Income of managed investment entities:
Investment income	—			49		—				49
Gain on change in fair value of assets/liabilities	—			6		—			(b)	6
Other income	57			—		(5		)	(c)	52
Total revenues	1,695			55		(13		)		1,737
Costs and Expenses:
Insurance benefits and expenses	1,262			—		—				1,262
Expenses of managed investment entities	—			55		(13		)	(b)(c)	42
Interest charges on borrowed money and other expenses	116			—		—				116
Total costs and expenses	1,378			55		(13		)		1,420
Earnings before income taxes	317			—		—				317
Provision (credit) for income taxes	(71		)	—		—				(71		)
Net earnings, including noncontrolling interests	388			—		—				388
Less: Net earnings attributable to noncontrolling interests	3			—		—				3
Net earnings attributable to shareholders	$	385		$	—	$	—			$	385

(a) Includes income of $7 million and $8 million in the fourth quarter of 2017 and 2016, respectively, representing the change in fair value of AFG’s CLO investments plus $4 million and $5 million in the fourth quarter of 2017 and 2016, respectively, in CLO management fees earned.

(b) Elimination of the change in fair value of AFG’s investments in the CLOs, including $6 million and $8 million in the fourth quarter of 2017 and 2016, respectively, in distributions recorded as interest expense by the CLOs.

(c) Elimination of management fees earned by AFG.

47

CONDENSED CONSOLIDATING STATEMENT OF EARNINGS - CONTINUED

	Before CLO Consolidation (a)		Managed Investment Entities		Consol. Entries				Consolidated As Reported
Year ended December 31, 2017
Revenues:
Insurance net earned premiums	$	4,601	$	—	$	—			$	4,601
Net investment income	1,854		—		(23		)	(b)	1,831
Realized gains on securities	5		—		—				5
Income of managed investment entities:
Investment income	—		210		—				210
Gain on change in fair value of assets/liabilities	—		22		(10		)	(b)	12
Other income	224		—		(18		)	(c)	206
Total revenues	6,684		232		(51		)		6,865
Costs and Expenses:
Insurance benefits and expenses	5,453		—		—				5,453
Expenses of managed investment entities	—		231		(50		)	(b)(c)	181
Interest charges on borrowed money and other expenses	507		—		—				507
Total costs and expenses	5,960		231		(50		)		6,141
Earnings before income taxes	724		1		(1		)		724
Provision for income taxes	247		—		—				247
Net earnings, including noncontrolling interests	477		1		(1		)		477
Less: Net earnings attributable to noncontrolling interests	2		—		—				2
Net earnings attributable to shareholders	$	475	$	1	$	(1	)		$	475
Year ended December 31, 2016
Revenues:
Insurance net earned premiums	$	4,352	$	—	$	—			$	4,352
Net investment income	1,733		—		(37		)	(b)	1,696
Realized gains on:
Securities	19		—		—				19
Subsidiaries	2		—		—				2
Income of managed investment entities:
Investment income	—		190		—				190
Gain on change in fair value of assets/liabilities	—		8		7			(b)	15
Other income	241		—		(17		)	(c)	224
Total revenues	6,347		198		(47		)		6,498
Costs and Expenses:
Insurance benefits and expenses	5,130		—		—				5,130
Expenses of managed investment entities	—		197		(46		)	(b)(c)	151
Interest charges on borrowed money and other expenses	430		—		—				430
Total costs and expenses	5,560		197		(46		)		5,711
Earnings before income taxes	787		1		(1		)		787
Provision for income taxes	119		—		—				119
Net earnings, including noncontrolling interests	668		1		(1		)		668
Less: Net earnings attributable to noncontrolling interests	19		—		—				19
Net earnings attributable to shareholders	$	649	$	1	$	(1	)		$	649

(a) Includes income of $23 million and $37 million in 2017 and 2016, respectively, representing the change in fair value of AFG’s CLO investments plus $18 million and $17 million in 2017 and 2016, respectively, in CLO management fees earned.

(b) Elimination of the change in fair value of AFG’s investments in the CLOs, including $32 million and $29 million in 2017 and 2016, respectively, in distributions recorded as interest expense by the CLOs.

(c) Elimination of management fees earned by AFG.

48

CONDENSED CONSOLIDATING STATEMENT OF EARNINGS - CONTINUED

	Before CLO Consolidation (a)			Managed Investment Entities		Consol. Entries				Consolidated As Reported
Year ended December 31, 2015
Revenues:
Insurance net earned premiums	$	4,328		$	—	$	—			$	4,328
Net investment income	1,627			—		6			(b)	1,633
Realized losses on:
Securities	(19		)	—		—				(19		)
Subsidiaries	(161		)	—		—				(161		)
Income (loss) of managed investment entities:
Investment income	—			155		—				155
Gain (loss) on change in fair value of assets/liabilities	—			2		(36		)	(b)	(34		)
Other income	258			—		(15		)	(c)	243
Total revenues	6,033			157		(45		)		6,145
Costs and Expenses:
Insurance benefits and expenses	5,057			—		—				5,057
Expenses of managed investment entities	—			155		(43		)	(b)(c)	112
Interest charges on borrowed money and other expenses	411			—		—				411
Total costs and expenses	5,468			155		(43		)		5,580
Earnings before income taxes	565			2		(2		)		565
Provision for income taxes	195			—		—				195
Net earnings, including noncontrolling interests	370			2		(2		)		370
Less: Net earnings attributable to noncontrolling interests	18			—		—				18
Net earnings attributable to shareholders	$	352		$	2	$	(2	)		$	352

(a) Includes a loss of $6 million representing the change in fair value of AFG’s CLO investments plus $15 million in CLO management fees earned.

(b) Elimination of the change in fair value of AFG’s investments in the CLOs, including $28 million in distributions recorded as interest expense by the CLOs.

(c) Elimination of management fees earned by AFG.

49

RESULTS OF OPERATIONS

General AFG’s net earnings attributable to shareholders, determined in accordance with GAAP, include certain items that may not be indicative of its ongoing core operations. For example, core net operating earnings excludes realized gains (losses) on securities because such gains and losses are influenced significantly by financial markets, interest rates and the timing of sales. Similarly, significant gains and losses from the sale of real estate are excluded from core earnings as they are influenced by the timing of sales and realized gains (losses) and significant tax benefits (charges) related to subsidiaries are excluded because such gains and losses are largely the result of the changing business strategy and market opportunities. In addition, special charges related to coverage that AFG no longer writes, such as the Neon exited lines and for asbestos and environmental exposures are excluded from core earnings. The following table (in millions, except per share amounts) identifies non-core items and reconciles net earnings attributable to shareholders to core net operating earnings, a non-GAAP financial measure. AFG believes core net operating earnings is a useful tool for investors and analysts in analyzing ongoing operating trends and for management to evaluate financial performance against historical results because it believes this provides a more comparable measure of its continuing business.

	Three months ended December 31,						Year ended December 31,
	2017			2016			2017			2016			2015
Components of net earnings attributable to shareholders:
Core operating earnings before income taxes	$	283		$	266		$	865		$	840		$	762
Pretax non-core items:
Realized gains (losses) on securities	6			51			5			19			(19		)
Realized gain (loss) on subsidiaries:
Long-term care business	—			—			—			2			(166		)
Other	—			—			—			—			5
Gain on sale of apartment properties and hotel	—			—			—			32			66
Special A&E charges	—			—			(113		)	(41		)	(79		)
Neon exited lines charge	18			—			18			(65		)	—
Loss on retirement of debt	(40		)	—			(51		)	—			(4		)
Earnings before income taxes	267			317			724			787			565
Provision (credit) for income taxes:
Core operating earnings	86			88			275			290			263
Non-core items:
Tax benefit related to Neon restructuring	(56		)	(111		)	(56		)	(111		)	—
Tax expense related to change in U.S. corporate tax rate	83			—			83			—			—
Tax benefit related to National Interstate merger	—			(66		)	—			(66		)	—
Other	(12		)	18			(55		)	6			(68		)
Total provision (credit) for income taxes	101			(71		)	247			119			195
Net earnings, including noncontrolling interests	166			388			477			668			370
Less net earnings attributable to noncontrolling interests:
Core operating earnings	—			2			2			16			13
Non-core items	—			1			—			3			5
Total net earnings attributable to noncontrolling interests	—			3			2			19			18
Net earnings attributable to shareholders	$	166		$	385		$	475		$	649		$	352
Net earnings:
Core net operating earnings	$	197		$	176		$	588		$	534		$	486
Non-core items	(31		)	209			(113		)	115			(134		)
Net earnings attributable to shareholders	$	166		$	385		$	475		$	649		$	352
Diluted per share amounts:
Core net operating earnings	$	2.20		$	1.98		$	6.55		$	6.03		$	5.44
Realized gains (losses) on securities	0.04			0.36			0.03			0.16			(0.12		)
Realized gain (loss) on subsidiaries:
Long-term care business	—			—			—			0.01			(1.21		)
Other	—			—			—			—			0.04
Gain on sale of apartment properties and hotel	—			—			—			0.17			0.40
Special A&E charges	—			—			(0.82		)	(0.30		)	(0.58		)
Neon exited lines charge	0.19			—			0.19			(0.73		)	—
Loss on retirement of debt	(0.29		)	—			(0.37		)	—			(0.03		)
Tax benefit related to Neon restructuring	0.62			1.25			0.62			1.25			—
Tax expense related to change in U.S. corporate tax rate	(0.92		)	—			(0.92		)	—			—
Tax benefit related to National Interstate merger	—			0.74			—			0.74			—
Net earnings attributable to shareholders	$	1.84		$	4.33		$	5.28		$	7.33		$	3.94

50

Net earnings attributable to shareholders decreased$219 million in the fourth quarter of 2017 compared to the same period in 2016 due primarily to the fourth quarter 2017 tax expense related to the change in the U.S. corporate tax rate, the fourth quarter 2016 tax benefits related to the National Interstate merger and Neon restructuring, lower net realized gains on securities in the 2017 period compared to the 2016 period and a loss on the retirement of debt in the 2017 period, partially offset by the fourth quarter 2017 favorable development in the Neon exited lines in connection with a reinsurance to close transaction and tax benefit from restructuring at Neon and higher core net operating earnings. Core net operating earnings increased$21 million in the fourth quarter of 2017 compared to the same period in 2016 reflecting higher operating earnings in the property and casualty insurance segment, partially offset by lower earnings in the annuity segment reflecting the impact of fair value accounting for fixed-indexed annuities.

Net earnings attributable to shareholders decreased$174 million for the full-year of 2017 compared to the same period in 2016 due primarily to the 2017 tax expense related to the change in the U.S. corporate tax rate, the 2016 tax benefits related to the National Interstate merger and Neon restructuring, higher special A&E charges recorded in 2017 compared to 2016, lower net realized gains on securities in 2017 compared to 2016, gains on the sale of real estate in 2016 and losses on the retirement of debt in 2017, partially offset by a 2016 charge related to the exit of certain lines of business within Neon and favorable development in 2017 on the Neon exited lines in connection with a reinsurance to close transaction, the 2017 benefit from restructuring at Neon and higher core net operating earnings. Core net operating earnings increased$54 million in 2017 compared to 2016 reflecting higher earnings in the property and casualty insurance and annuity segments.

Net earnings attributable to shareholders increased $297 million for the full-year of 2016 compared to the same period in 2015 due primarily to the 2016 tax benefits related to the National Interstate merger and Neon restructuring, lower special A&E charges recorded in 2016 compared to 2015, net realized gains on securities in 2016 compared to net realized losses on securities in 2015, the estimated loss on the sale of the subsidiaries containing substantially all of AFG’s run-off long-term care insurance business that was recorded in the first quarter of 2015 and higher core net operating earnings, partially offset by a charge related to the exit of certain lines of business within Neon, and lower gains on the sale of real estate in 2016 compared to 2015. Core net operating earnings increased $48 million in 2016 compared to 2015 reflecting higher underwriting profit and net investment income in the ongoing property and casualty insurance operations and higher earnings in the annuity segment, partially offset by lower profitability in the run-off long-term care and life segment and higher holding company expenses.

51

RESULTS OF OPERATIONS — QUARTERS ENDED DECEMBER 31, 2017 AND 2016

Segmented Statement of Earnings   AFG reports its business as four segments: (i) Property and casualty insurance (“P&C”), (ii) Annuity, (iii) Run-off long-term care and life and (iv) Other, which includes holding company costs and income and expenses related to the managed investment entities (“MIEs”).

AFG’s net earnings attributable to shareholders, determined in accordance with GAAP, include certain items that may not be indicative of its ongoing core operations. The following tables for the three months ended December 31, 2017 and 2016 identify such items by segment and reconcile net earnings attributable to shareholders to core net operating earnings, a non-GAAP financial measure that AFG believes is a useful tool for investors and analysts in analyzing ongoing operating trends (in millions):

									Other
	P&C			Annuity		Run-off long-term care and life			Consol. MIEs			Holding Co., other and unallocated			Total			Non-core reclass			GAAP Total
Three months ended December 31, 2017
Revenues:
Property and casualty insurance net earned premiums	$	1,225		$	—	$	—		$	—		$	—		$	1,225		$	—		$	1,225
Life, accident and health net earned premiums	—			—		5			—			—			5			—			5
Net investment income	86			376		4			(7		)	6			465			—			465
Realized gains on securities	—			—		—			—			—			—			6			6
Income of MIEs:
Investment income	—			—		—			55			—			55			—			55
Gain on change in fair value of assets/liabilities	—			—		—			—			—			—			—			—
Other income	7			24		3			(4		)	22			52			—			52
Total revenues	1,318			400		12			44			28			1,802			6			1,808
Costs and Expenses:
Property and casualty insurance:
Losses and loss adjustment expenses	734			—		—			—			—			734			(18		)	716
Commissions and other underwriting expenses	336			—		—			—			9			345			—			345
Annuity benefits	—			257		—			—			—			257			—			257
Life, accident and health benefits	—			—		5			—			—			5			—			5
Annuity and supplemental insurance acquisition expenses	—			15		2			—			—			17			—			17
Interest charges on borrowed money	—			—		—			—			20			20			—			20
Expenses of MIEs	—			—		—			44			—			44			—			44
Other expenses	15			31		3			—			48			97			40			137
Total costs and expenses	1,085			303		10			44			77			1,519			22			1,541
Earnings before income taxes	233			97		2			—			(49		)	283			(16		)	267
Provision for income taxes	69			32		1			—			(16		)	86			15			101
Net earnings, including noncontrolling interests	164			65		1			—			(33		)	197			(31		)	166
Less: Net earnings attributable to noncontrolling interests	—			—		—			—			—			—			—			—
Core Net Operating Earnings	164			65		1			—			(33		)	197
Non-core earnings attributable to shareholders (a):
Realized gains on securities, net of tax	—			—		—			—			4			4			(4		)	—
Neon exited lines charge	18			—		—			—			—			18			(18		)	—
Loss on retirement of debt, net of tax	—			—		—			—			(26		)	(26		)	26			—
Tax benefit related to Neon restructuring	56			—		—			—			—			56			(56		)	—
Tax expense related to change in U.S. corporate tax rate	(88		)	25		(1		)	—			(19		)	(83		)	83			—
Net Earnings Attributable to Shareholders	$	150		$	90	$	—		$	—		$	(74	)	$	166		$	—		$	166

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							Other
	P&C		Annuity		Run-off long-term care and life		Consol. MIEs			Holding Co., other and unallocated			Total		Non-core reclass			GAAP Total
Three months ended December 31, 2016
Revenues:
Property and casualty insurance net earned premiums	$	1,144	$	—	$	—	$	—		$	—		$	1,144	$	—		$	1,144
Life, accident and health net earned premiums	—		—		6		—			—			6		—			6
Net investment income	85		346		6		(8		)	—			429		—			429
Realized gains on securities	—		—		—		—			—			—		51			51
Income of MIEs:
Investment income	—		—		—		49			—			49		—			49
Gain on change in fair value of assets/liabilities	—		—		—		6			—			6		—			6
Other income	5		27		—		(5		)	25			52		—			52
Total revenues	1,234		373		12		42			25			1,686		51			1,737
Costs and Expenses:
Property and casualty insurance:
Losses and loss adjustment expenses	729		—		—		—			—			729		—			729
Commissions and other underwriting expenses	305		—		—		—			6			311		—			311
Annuity benefits	—		160		—		—			—			160		—			160
Life, accident and health benefits	—		—		7		—			—			7		—			7
Annuity and supplemental insurance acquisition expenses	—		54		1		—			—			55		—			55
Interest charges on borrowed money	—		—		—		—			21			21		—			21
Expenses of MIEs	—		—		—		42			—			42		—			42
Other expenses	18		27		2		—			48			95		—			95
Total costs and expenses	1,052		241		10		42			75			1,420		—			1,420
Earnings before income taxes	182		132		2		—			(50		)	266		51			317
Provision (credit) for income taxes	65		44		1		—			(22		)	88		(159		)	(71		)
Net earnings, including noncontrolling interests	117		88		1		—			(28		)	178		210			388
Less: Net earnings attributable to noncontrolling interests	2		—		—		—			—			2		1			3
Core Net Operating Earnings	115		88		1		—			(28		)	176
Non-core earnings attributable to shareholders (a):
Realized gains on securities, net of tax and noncontrolling interests	—		—		—		—			32			32		(32		)	—
Tax benefit related to Neon restructuring	111		—		—		—			—			111		(111		)	—
Tax benefit related to National Interstate merger	66		—		—		—			—			66		(66		)	—
Net Earnings Attributable to Shareholders	$	292	$	88	$	1	$	—		$	4		$	385	$	—		$	385

(a) See the reconciliation of core earnings to GAAP net earnings under “Results of Operations — General” for details on the tax and noncontrolling interest impacts of these reconciling items.

Property and Casualty Insurance Segment — Results of Operations   Performance measures such as underwriting profit or loss and related combined ratios are often used by property and casualty insurers to help users of their financial statements better understand the company’s performance. Underwriting profitability is measured by the combined ratio, which is a sum of the ratios of losses and loss adjustment expenses, and commissions and other underwriting expenses to premiums. A combined ratio under 100% indicates an underwriting profit. The combined ratio does not reflect net investment income, other income, other expenses or federal income taxes.

AFG’s property and casualty insurance operations contributed $251 million in GAAP pretax earnings in the fourth quarter of 2017 compared to $182 million in the fourth quarter of 2016, an increase of $69 million (38%). Property and casualty core pretax earnings were $233 million in the fourth quarter of 2017 compared to $182 million in the fourth quarter of 2016, an increase of $51 million (28%). The increase in GAAP and core pretax earnings reflects improved underwriting results in the Property and transportation and Specialty casualty insurance sub-segments and lower other expenses. The increase in GAAP

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pretax earnings also reflects favorable development in the fourth quarter of 2017 in the Neon exited lines in connection with a reinsurance to close transaction.

The following table details AFG’s earnings before income taxes from its property and casualty insurance operations for the three months ended December 31, 2017 and 2016 (dollars in millions):

	Three months ended December 31,
	2017			2016			% Change
Gross written premiums	$	1,571		$	1,441		9	%
Reinsurance premiums ceded	(410		)	(358		)	15	%
Net written premiums	1,161			1,083			7	%
Change in unearned premiums	64			61			5	%
Net earned premiums	1,225			1,144			7	%
Loss and loss adjustment expenses (*)	734			729			1	%
Commissions and other underwriting expenses	336			305			10	%
Core underwriting gain	155			110			41	%
Net investment income	86			85			1	%
Other income and expenses, net	(8		)	(13		)	(38	%)
Core earnings before income taxes	233			182			28	%
Pretax non-core Neon exited lines charge	18			—			—	%
GAAP earnings before income taxes	$	251		$	182		38	%
(*) Excludes pretax non-core income of $18 million in the fourth quarter of 2017 representing favorable development related to the Neon exited lines in connection with a reinsurance to close transaction.
Combined Ratios:
Specialty lines							Change
Loss and LAE ratio	59.8		%	63.7		%	(3.9	%)
Underwriting expense ratio	27.5		%	26.7		%	0.8	%
Combined ratio	87.3		%	90.4		%	(3.1	%)
Aggregate — including exited lines
Loss and LAE ratio	58.5		%	63.7		%	(5.2	%)
Underwriting expense ratio	27.5		%	26.7		%	0.8	%
Combined ratio	86.0		%	90.4		%	(4.4	%)

AFG’s statutory combined ratio has been better than the U.S. industry average for 30 of the last 32 years. Management believes that AFG’s insurance operations have performed better than the industry as a result of its specialty niche focus, product line diversification, stringent underwriting discipline and alignment of compensation incentives.

AFG reports the underwriting performance of its Specialty property and casualty insurance business in the following sub-segments: (i) Property and transportation, (ii) Specialty casualty and (iii) Specialty financial.

To understand the overall profitability of particular lines, the timing of claims payments and the related impact of investment income must be considered. Certain “short-tail” lines of business (primarily property coverages) generally have quick loss payouts, which reduce the time funds are held, thereby limiting investment income earned thereon. In contrast, “long-tail” lines of business (primarily liability coverages and workers’ compensation) generally have payouts that are either structured over many years or take many years to settle, thereby significantly increasing investment income earned on related premiums received.

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Gross Written Premiums

Gross written premiums (“GWP”) for AFG’s property and casualty insurance segment were $1.57 billion for the fourth quarter of 2017 compared to $1.44 billion for the fourth quarter of 2016, an increase of $130 million (9%). Detail of AFG’s property and casualty gross written premiums is shown below (dollars in millions):

	Three months ended December 31,
	2017				2016
	GWP		%		GWP		%		% Change
Property and transportation	$	626	40	%	$	577	40	%	8	%
Specialty casualty	737		47	%	684		47	%	8	%
Specialty financial	208		13	%	180		13	%	16	%
	$	1,571	100	%	$	1,441	100	%	9	%

Reinsurance Premiums Ceded

Reinsurance premiums ceded (“Ceded”) for AFG’s property and casualty insurance segment were 26% of gross written premiums for the fourth quarter of 2017 compared to 25% for the fourth quarter of 2016, an increase of 1 percentage point. Detail of AFG’s property and casualty reinsurance premiums ceded is shown below (dollars in millions):

	Three months ended December 31,
	2017					2016					Change in
	Ceded			% of GWP		Ceded			% of GWP		% of GWP
Property and transportation	$	(202	)	32	%	$	(183	)	32	%	—	%
Specialty casualty	(182		)	25	%	(174		)	25	%	—	%
Specialty financial	(52		)	25	%	(26		)	14	%	11	%
Other specialty	26					25
	$	(410	)	26	%	$	(358	)	25	%	1	%

Net Written Premiums

Net written premiums (“NWP”) for AFG’s property and casualty insurance segment were $1.16 billion for the fourth quarter of 2017 compared to $1.08 billion for the fourth quarter of 2016, an increase of $78 million (7%). Detail of AFG’s property and casualty net written premiums is shown below (dollars in millions):

	Three months ended December 31,
	2017				2016
	NWP		%		NWP		%		% Change
Property and transportation	$	424	37	%	$	394	37	%	8	%
Specialty casualty	555		48	%	510		47	%	9	%
Specialty financial	156		13	%	154		14	%	1	%
Other specialty	26		2	%	25		2	%	4	%
	$	1,161	100	%	$	1,083	100	%	7	%

Net Earned Premiums

Net earned premiums (“NEP”) for AFG’s property and casualty insurance segment were $1.23 billion for the fourth quarter of 2017 compared to $1.14 billion for the fourth quarter of 2016, an increase of $81 million (7%). Detail of AFG’s property and casualty net earned premiums is shown below (dollars in millions):

	Three months ended December 31,
	2017				2016
	NEP		%		NEP		%		% Change
Property and transportation	$	485	40	%	$	465	41	%	4	%
Specialty casualty	573		47	%	510		45	%	12	%
Specialty financial	141		11	%	141		12	%	—	%
Other specialty	26		2	%	28		2	%	(7	%)
	$	1,225	100	%	$	1,144	100	%	7	%

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The $130 millionincrease in gross written premiums in the fourth quarter of 2017 compared to the fourth quarter of 2016 reflects growth in each of the Specialty property and casualty insurance sub-segments. Overall average renewal rates increased approximately 1% in the fourth quarter of 2017.

Property and transportation Gross written premiums increased$49 million (8%) in the fourth quarter of 2017 compared to the fourth quarter of 2016. This increase was due primarily to higher year-over-year gross written premiums in the crop business, as well as higher gross written premiums in the property and inland marine and Singapore operations. This growth was partially offset by lower gross written premiums resulting from an exit from the customs bond business, which was part of the ocean marine operations. Average renewal rates increased approximately 3% for this group in the fourth quarter of 2017. Reinsurance premiums ceded as a percentage of gross written premiums are comparable between periods.

Specialty casualty Gross written premiums increased$53 million (8%) in the fourth quarter of 2017 compared to the fourth quarter of 2016. Higher gross written premiums at Neon, resulting from the growth of its portfolio in targeted classes of business, higher gross written premiums in the workers’ compensation businesses, primarily the result of rate increases in Florida, and growth in the excess and surplus lines businesses all contributed to the year-over-year growth. Average renewal rates for this group increased approximately 1% in the fourth quarter of 2017. Reinsurance premiums ceded as a percentage of gross written premiums are comparable between periods.

Specialty financial Gross written premiums increased$28 million (16%) in the fourth quarter of 2017 compared to the fourth quarter of 2016, due primarily to higher premiums in the lending and leasing businesses. Average renewal rates for this group were flat in the fourth quarter of 2017. Reinsurance premiums ceded as a percentage of gross written premiums increased 11 percentage points for the fourth quarter of 2017 compared to the fourth quarter of 2016 reflecting higher cessions in the lending and leasing businesses.

Other specialty The amounts shown as reinsurance premiums ceded represent business assumed by AFG’s internal reinsurance program from the operations that make up AFG’s other Specialty property and casualty insurance sub-segments.

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Combined Ratio

Performance measures such as the combined ratio are often used by property and casualty insurers to help users of their financial statements better understand the company’s performance. The combined ratio is the sum of the loss and loss adjustment expenses (“LAE”) and underwriting expense ratios. These ratios are calculated by dividing each of the respective expenses by net earned premiums. The table below (dollars in millions) details the components of the combined ratio for AFG’s property and casualty insurance segment:

	Three months ended December 31,						Three months ended December 31,
	2017		2016		Change		2017		2016
Property and transportation
Loss and LAE ratio	67.1	%	68.6	%	(1.5	%)
Underwriting expense ratio	15.5	%	15.3	%	0.2	%
Combined ratio	82.6	%	83.9	%	(1.3	%)
Underwriting profit							$	84	$	75
Specialty casualty
Loss and LAE ratio	59.1	%	68.2	%	(9.1	%)
Underwriting expense ratio	30.9	%	29.2	%	1.7	%
Combined ratio	90.0	%	97.4	%	(7.4	%)
Underwriting profit							$	58	$	13
Specialty financial
Loss and LAE ratio	33.1	%	32.4	%	0.7	%
Underwriting expense ratio	53.1	%	53.6	%	(0.5	%)
Combined ratio	86.2	%	86.0	%	0.2	%
Underwriting profit							$	19	$	20
Total Specialty
Loss and LAE ratio	59.8	%	63.7	%	(3.9	%)
Underwriting expense ratio	27.5	%	26.7	%	0.8	%
Combined ratio	87.3	%	90.4	%	(3.1	%)
Underwriting profit							$	156	$	110
Aggregate — including exited lines
Loss and LAE ratio	58.5	%	63.7	%	(5.2	%)
Underwriting expense ratio	27.5	%	26.7	%	0.8	%
Combined ratio	86.0	%	90.4	%	(4.4	%)
Underwriting profit							$	173	$	110

The Specialty property and casualty insurance operations generated an underwriting profit of $156 million for the fourth quarter of 2017 compared to $110 million in the fourth quarter of 2016, an increase of $46 million (42%). The higher underwriting profit in the fourth quarter of 2017 reflects improved underwriting results in the Property and transportation and Specialty casualty sub-segments. Overall catastrophe losses were $8 million (0.6 points on the combined ratio) and related net reinstatement premiums paid were $4 million in the fourth quarter of 2017 compared to catastrophe losses of $12 million (1.1 points) in the fourth quarter of 2016. Losses related to third quarter catastrophes, specifically Hurricanes Harvey, Irma and Maria, and two earthquakes in Mexico, developed favorably by $25 million during the fourth quarter of 2017 across all property and casualty sub-segments.

Property and transportation Underwriting profit for this group was $84 million for the fourth quarter of 2017 compared to $75 million in the fourth quarter of 2016, an increase of $9 million (12%) reflecting higher underwriting profit in the transportation businesses, partially offset by lower year-over-year underwriting profits in the agricultural operations. The crop insurance operations reported strong underwriting profitability during the fourth quarter of 2017, albeit at lower levels than in the 2016fourth quarter. Catastrophe losses had a favorable impact of $3 million (0.6 points on the combined ratio) for the fourth quarter of 2017 compared to a $6 million loss (1.2 points) for the fourth quarter of 2016. Catastrophe losses for the fourth quarter of 2017 include the impact of the favorable reserve development on third quarter catastrophes discussed above.

Specialty casualty Underwriting profit for this group was $58 million for the fourth quarter of 2017 compared to $13 million in the fourth quarter of 2016, an increase of $45 million (346%). This increase is due primarily to favorable reserve

57

development within Neon, most significantly the portion of the 2015 and prior years reinsurance to close transaction attributed to ongoing lines of business, and higher underwriting profit in the workers’ compensation and excess and surplus lines businesses. These improved results were partially offset by lower underwriting profits in the targeted markets operations. Catastrophe losses were $14 million (2.5 points on the combined ratio) and related net reinstatement premiums paid were $4 million for the fourth quarter of 2017 compared to catastrophe losses of $4 million (0.8 points) for the fourth quarter of 2016. Catastrophe losses for the fourth quarter of 2017 include the impact of the favorable reserve development on third quarter catastrophes discussed above.

Specialty financial Underwriting profit for this group was $19 million for the fourth quarter of 2017 compared to $20 million in the fourth quarter of 2016, a decrease of $1 million (5%) reflecting underwriting profit in all businesses in this group. Catastrophe losses had a favorable impact of $5 million (3.7 points on the combined ratio) for the fourth quarter of 2017 compared to a loss of $2 million (1.7 points) for the fourth quarter of 2016. Catastrophe losses for the fourth quarter of 2017 include the impact of the favorable reserve development on third quarter catastrophes discussed above.

Other specialty This group reported an underwriting loss of $5 million for the fourth quarter of 2017 compared to underwriting profit of $2 million in the fourth quarter of 2016, a decrease of $7 million (350%). The decrease is due primarily to an $8 million charge to adjust the deferred gain on the retroactive reinsurance transaction entered into in connection with the sale of businesses in 1998.

Aggregate Aggregate underwriting results for AFG’s property and casualty insurance segment for the fourth quarter of 2017 includes favorable development in the Neon exited lines discussed in more detail below under “Net prior year reserve development.”

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Losses and Loss Adjustment Expenses

AFG’s overall loss and LAE ratio was 58.5% for the fourth quarter of 2017 compared to 63.7% for fourth quarter of 2016, a decrease of 5.2 percentage points. The components of AFG’s property and casualty losses and LAE amounts and ratio are detailed below (dollars in millions):

	Three months ended December 31,
	Amount						Ratio				Change in
	2017			2016			2017		2016		Ratio
Property and transportation
Current year, excluding catastrophe losses	$	332		$	300		68.5	%	64.4	%	4.1	%
Prior accident years development	(4		)	13			(0.8	%)	3.0	%	(3.8	%)
Current year catastrophe losses	(3		)	6			(0.6	%)	1.2	%	(1.8	%)
Property and transportation losses and LAE and ratio	$	325		$	319		67.1	%	68.6	%	(1.5	%)
Specialty casualty
Current year, excluding catastrophe losses	$	376		$	341		65.8	%	66.9	%	(1.1	%)
Prior accident years development	(52		)	3			(9.2	%)	0.5	%	(9.7	%)
Current year catastrophe losses	14			4			2.5	%	0.8	%	1.7	%
Specialty casualty losses and LAE and ratio	$	338		$	348		59.1	%	68.2	%	(9.1	%)
Specialty financial
Current year, excluding catastrophe losses	$	51		$	50		36.0	%	35.2	%	0.8	%
Prior accident years development	1			(6		)	0.8	%	(4.5	%)	5.3	%
Current year catastrophe losses	(5		)	2			(3.7	%)	1.7	%	(5.4	%)
Specialty financial losses and LAE and ratio	$	47		$	46		33.1	%	32.4	%	0.7	%
Total Specialty
Current year, excluding catastrophe losses	$	774		$	707		63.3	%	61.7	%	1.6	%
Prior accident years development	(49		)	10			(4.1	%)	0.9	%	(5.0	%)
Current year catastrophe losses	8			12			0.6	%	1.1	%	(0.5	%)
Total Specialty losses and LAE and ratio	$	733		$	729		59.8	%	63.7	%	(3.9	%)
Aggregate — including exited lines
Current year, excluding catastrophe losses	$	774		$	707		63.3	%	61.7	%	1.6	%
Prior accident years development	(66		)	10			(5.4	%)	0.9	%	(6.3	%)
Current year catastrophe losses	8			12			0.6	%	1.1	%	(0.5	%)
Aggregate losses and LAE and ratio	$	716		$	729		58.5	%	63.7	%	(5.2	%)

Current accident year losses and LAE, excluding catastrophe losses

The current accident year loss and LAE ratio, excluding catastrophe losses for AFG’s Specialty property and casualty insurance operations was 63.3% for the fourth quarter of 2017 compared to 61.7% for the fourth quarter of 2016, an increase of 1.6 percentage points.

Property and transportation   The 4.1 percentage points increase in the loss and LAE ratio for the current year, excluding catastrophe losses reflects an increase in the loss and LAE ratio of the crop, equine, trucking, and property and inland marine businesses and the Singapore branch in the fourth quarter of 2017 compared to the fourth quarter of 2016.

Specialty casualty   The 1.1 percentage points improvement in the loss and LAE ratio for the current year, excluding catastrophe losses reflects a decrease in the loss and LAE ratio at Neon.

Specialty financial   The loss and LAE ratio for the current year, excluding catastrophe losses increased 0.8 percentage points in the fourth quarter of 2017 compared to the fourth quarter of 2016.

Net prior year reserve development

AFG’s Specialty property and casualty insurance operations recorded net favorable reserve development related to prior accident years of $49 million in the fourth quarter of 2017 compared to net adverse reserve development related to prior accident years of $10 million in the fourth quarter of 2016.

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Property and transportation   Net favorable reserve development of $4 million in the fourth quarter of 2017 reflects lower than expected losses in the crop business and lower than expected claim severity in the property and inland marine and trucking businesses, partially offset by higher than expected claim severity and frequency in the ocean marine business. Net adverse reserve development of $13 million in the fourth quarter of 2016 reflects reserve strengthening at National Interstate and higher than expected claim severity in the ocean marine business.

Specialty casualty   Net favorable reserve development of $52 million in the fourth quarter of 2017 reflects favorable reserve development on ongoing lines of business within Neon recorded in connection with the reinsurance to close agreement entered into in December 2017 for the 2015 and prior years of account, lower than anticipated claim severity in the workers’ compensation businesses and lower than expected losses in the executive liability business, partially offset by higher than anticipated claim severity in the targeted markets businesses and higher than anticipated severity in New York contractor claims. Net adverse reserve development of $3 million in the fourth quarter of 2016 reflects higher than anticipated severity in New York contractor claims, adverse reserve development at Neon and higher than anticipated claim severity in the targeted programs business, partially offset by lower than anticipated claim frequency and severity in the workers’ compensation businesses.

In the fourth quarter of 2017, Neon entered into a reinsurance to close agreement for its 2015 and prior years of account, which transfers the responsibility for all of the liabilities that attach to the transferred year of account as well as any income due to the closing year of account in return for a premium. As a result of the reinsurance to close agreement, Neon recorded favorable development of $42 million, of which $24 million related to its ongoing lines of business (included in Specialty casualty) and $18 million related to the exited lines of business (discussed below and included in Neon exited lines charge).

Specialty financial   Net adverse reserve development of $1 million in the fourth quarter of 2017 reflects higher than expected claim severity in the financial institutions business, partially offset by lower than anticipated claim frequency and severity in the surety business. Net favorable reserve development of $6 million in the fourth quarter of 2016 reflects lower than expected claim frequency in the financial institutions business and lower than anticipated claim severity in the fidelity business.

Other specialty In addition to the reserve development discussed above, total Specialty prior year reserve development includes net adverse reserve development of $6 million in the fourth quarter of 2017 reflecting an $8 million charge to adjust the deferred gain on the retroactive reinsurance transaction entered into in connection with the sale of businesses in 1998, partially offset by the amortization of deferred gains on retroactive insurance.

Neon exited lines charge During the second quarter of 2016, AFG’s specialist Lloyd’s market insurer completed a strategic review of its business under a new leadership team and re-launched as Neon Underwriting Ltd. As part of its strategic review, Neon sold and/or exited certain historical lines of business including its UK and international medical malpractice and general liability classes. As a result of Neon’s claims review of its exited lines of business, AFG recorded a charge of approximately $65 million including $57 million to increase loss reserves primarily related to its medical malpractice and general liability lines. Consistent with the treatment of other items that are not indicative of AFG’s ongoing operations (both favorable and unfavorable), the 2016 charge was treated as non-core because it resulted from a special strategic review of lines of business that Neon no longer writes. Similarly, the $18 million in favorable development related to the Neon exited lines recorded in connection with the December 2017 reinsurance to close transaction (discussed above under Specialty casualty) was treated as non-core.

Aggregate Aggregate net prior accident years reserve development for AFG’s property and casualty insurance segment for the fourth quarter of 2017 includes the favorable development on the Neon exited lines discussed above and adverse reserve development of $1 million related to business outside of the Specialty group that AFG no longer writes.

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Catastrophe losses

AFG generally seeks to reduce its exposure to catastrophes through individual risk selection, including minimizing coastal and known fault-line exposures, and the purchase of reinsurance. Based on data available at December 31, 2017, AFG’s exposure to a catastrophic earthquake or windstorm that industry models indicate should statistically occur once in every 100, 250 or 500 years as a percentage of AFG’s Shareholders’ Equity is shown below:

	Impact of modeled loss on AFG’s
Industry Model	Shareholders’ Equity
100-year event	Less than 1%
250-year event	Less than 2%
500-year event	Less than 4%

AFG maintains comprehensive catastrophe reinsurance coverage, including a $15 million per occurrence net retention for its U.S.-based property and casualty insurance operations for losses up to $100 million and a separate $15 million per occurrence retention for Neon for losses up to $200 million ($225 million for U.S. catastrophe events). AFG’s property and casualty insurance operations further maintain supplemental fully collateralized reinsurance coverage up to 95% of $200 million for catastrophe losses in excess of $100 million of traditional catastrophe reinsurance through a catastrophe bond.

Catastrophe losses of $8 million in the fourth quarter of 2017 resulted primarily from wildfires in California, partially offset by favorable development related to third quarter 2017 catastrophe losses, specifically Hurricanes Harvey, Irma and Maria, and two earthquakes in Mexico. Catastrophe losses of $12 million in the fourth quarter of 2016 resulted primarily from Hurricane Matthew.

Commissions and Other Underwriting Expenses

AFG’s property and casualty commissions and other underwriting expenses (“U/W Exp”) were $336 million in the fourth quarter of 2017 compared to $305 million for the fourth quarter of 2016, an increase of $31 million (10%). AFG’s underwriting expense ratio, calculated as commissions and other underwriting expenses divided by net premiums earned, was 27.5% for the fourth quarter of 2017 compared to 26.7% for the fourth quarter of 2016, an increase of 0.8 percentage points. Detail of AFG’s property and casualty commissions and other underwriting expenses and underwriting expense ratios is shown below (dollars in millions):

	Three months ended December 31,
	2017				2016				Change in
	U/W Exp		% of NEP		U/W Exp		% of NEP		% of NEP
Property and transportation	$	76	15.5	%	$	71	15.3	%	0.2	%
Specialty casualty	177		30.9	%	149		29.2	%	1.7	%
Specialty financial	75		53.1	%	75		53.6	%	(0.5	%)
Other specialty	8		36.8	%	10		35.4	%	1.4	%
	$	336	27.5	%	$	305	26.7	%	0.8	%

AFG’s overall expense ratio increased0.8 percentage points in the fourth quarter of 2017 as compared to the fourth quarter of 2016.

Property and transportation   Commissions and other underwriting expenses as a percentage of net earned premiums increased0.2 percentage points in the fourth quarter of 2017 compared to the fourth quarter of 2016 reflecting a change in the mix of business.

Specialty casualty   Commissions and other underwriting expenses as a percentage of net earned premiums increased1.7 percentage points in the fourth quarter of 2017 compared to the fourth quarter of 2016 reflecting growth at Neon, which has a higher expense ratio than AFG’s overall Specialty casualty group.

Specialty financial   Commissions and other underwriting expenses as a percentage of net earned premiums decreased0.5 percentage points in the fourth quarter of 2017 compared to the fourth quarter of 2016 reflecting lower profitability-based commissions paid to agents in the financial institutions business.

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Property and Casualty Net Investment Income

Net investment income in AFG’s property and casualty insurance operations was $86 million in the fourth quarter of 2017 compared to $85 million in the fourth quarter of 2016, an increase of $1 million (1%). In recent years, yields available in the financial markets on fixed maturity securities have generally declined, placing downward pressure on AFG’s investment portfolio yield. The average invested assets and overall yield earned on investments held by AFG’s property and casualty insurance operations are provided below (dollars in millions):

	Three months ended December 31,
	2017			2016			Change			% Change
Net investment income	$	86		$	85		$	1		1	%
Average invested assets (at amortized cost)	$	10,062		$	9,779		$	283		3	%
Yield (net investment income as a % of average invested assets)	3.42		%	3.48		%	(0.06		%)
Tax equivalent yield (*)	3.85		%	3.92		%	(0.07		%)

(*) Adjusts the yield on equity securities and tax-exempt bonds to the fully taxable equivalent yield.

The increase in average invested assets and net investment income in the property and casualty insurance segment for the fourth quarter of 2017 as compared to the fourth quarter of 2016 is due primarily to growth in the property and casualty insurance segment. The property and casualty insurance segment’s overall yield on investments (net investment income as a percentage of average invested assets) was 3.42% for the fourth quarter of 2017 compared to 3.48% for the fourth quarter of 2016, a decrease of 0.06 percentage points, reflecting the impact of lower yields available in the financial markets and lower income from equity in the earnings of limited partnerships and similar investments.

Property and Casualty Other Income and Expenses, Net

Other income and expenses, net for AFG’s property and casualty insurance operations was a net expense of $8 million for the fourth quarter of 2017 compared to $13 million for the fourth quarter of 2016, a decrease of $5 million (38%). The table below details the items included in other income and expenses, net for AFG’s property and casualty insurance operations (in millions):

	Three months ended December 31,
	2017			2016
Other income
Income from the sale of real estate	$	—		$	1
Other	7			4
Total other income	7			5
Other expenses
Amortization of intangibles	2			2
NATL merger expenses	—			5
Other	13			11
Total other expenses	15			18
Other income and expenses, net	$	(8	)	$	(13	)

Other income for AFG’s property and casualty insurance operations for the fourth quarter of 2017 includes a $3 million death benefit on a life insurance policy.

AFG and its consolidated subsidiaries incurred $5 million in transaction expenses in the fourth quarter of 2016 related to GAI’s acquisition of the NATL common stock that it did not already own. These expenses consisted primarily of financial advisory and legal services. See Note B — “Acquisitions and Sale of Businesses” to the financial statements.

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Annuity Segment — Results of Operations

AFG’s annuity operations contributed $97 million in pretax earnings in the fourth quarter of 2017 compared to $132 million in the fourth quarter of 2016, a decrease of $35 million (27%). AFG’s annuity segment results for the fourth quarter of 2017 as compared to the fourth quarter of 2016 reflect the unfavorable impact of lower than expected interest rates on the fair value accounting for fixed-indexed annuities (“FIAs”) in the 2017 quarter compared to the favorable impact of higher than anticipated interest rates in the 2016 quarter, the impact of lower investment yields due to the run-off of higher yielding investments and higher general and administrative expenses, partially offset by a 10% increase in average annuity investments (at amortized cost). Both periods reflect the positive impact of strong stock market performance on fair value accounting for FIAs and exceptionally strong investment income. AFG’s periodic detailed review (“unlocking”) of the major actuarial assumptions underlying its annuity operations resulted in a net annuity charge of $3 million in the fourth quarter of 2017 compared to a net annuity expense reduction of $1 million in the fourth quarter of 2016.

The following table details AFG’s earnings before income taxes from its annuity operations for the three months ended December 31, 2017 and 2016 (dollars in millions):

	Three months ended December 31,
	2017		2016		% Change
Revenues:
Net investment income	$	376	$	346	9	%
Other income:
Guaranteed withdrawal benefit fees	17		14		21	%
Policy charges and other miscellaneous income	7		13		(46	%)
Total revenues	400		373		7	%
Costs and Expenses:
Annuity benefits (*)	257		160		61	%
Acquisition expenses	15		54		(72	%)
Other expenses	31		27		15	%
Total costs and expenses	303		241		26	%
Earnings before income taxes	$	97	$	132	(27	%)

Detail of annuity earnings before income taxes (dollars in millions):

	Three months ended December 31,
	2017			2016		% Change
Earnings before income taxes — before the impact of derivatives related to FIAs	$	108		$	103	5	%
Impact of derivatives related to FIAs	(11		)	29		(138	%)
Earnings before income taxes	$	97		$	132	(27	%)

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(*) Annuity benefits consisted of the following (dollars in millions):

	Three months ended December 31,
	2017			2016			% Change
Interest credited — fixed	$	164		$	148		11	%
Interest credited — fixed component of variable annuities	1			1			—	%
Other annuity benefits:
Change in expected death and annuitization reserve	5			4			25	%
Amortization of sales inducements	5			7			(29	%)
Change in guaranteed withdrawal benefit reserve	16			20			(20	%)
Change in other benefit reserves	9			11			(18	%)
Total other annuity benefits	35			42			(17	%)
Total before impact of derivatives related to FIAs and unlocking	200			191			5	%
Derivatives related to fixed-indexed annuities:
Embedded derivative mark-to-market	178			6			2,867	%
Equity option mark-to-market	(156		)	(60		)	160	%
Impact of derivatives related to FIAs	22			(54		)	(141	%)
Unlocking	35			23			52	%
Total annuity benefits	$	257		$	160		61	%

See “Annuity Unlocking” below for a discussion of the impact that the periodic review of actuarial assumptions had on annuity benefit expense.

The profitability of a fixed annuity business is largely dependent on the ability of a company to earn income on the assets supporting the business in excess of the amounts credited to policyholder accounts plus expenses incurred (earning a “spread”). Performance measures such as net interest spread and net spread earned are often presented by annuity businesses to help users of their financial statements better understand the company’s performance.

Net Spread on Fixed Annuities (excludes variable annuity earnings)

The table below (dollars in millions) details the components of these spreads for AFG’s fixed annuity operations (including fixed-indexed annuities):

	Three months ended December 31,
	2017			2016			% Change
Average fixed annuity investments (at amortized cost)	$	32,245		$	29,192		10	%
Average fixed annuity benefits accumulated	32,680			29,250			12	%
As % of fixed annuity benefits accumulated (except as noted):
Net investment income (as % of fixed annuity investments)	4.62		%	4.72		%
Interest credited — fixed	(2.00		%)	(2.02		%)
Net interest spread	2.62		%	2.70		%
Policy charges and other miscellaneous income	0.10		%	0.15		%
Other annuity benefit expenses, net of guaranteed withdrawal benefit fees	(0.21		%)	(0.38		%)
Acquisition expenses	(0.60		%)	(1.06		%)
Other expenses	(0.37		%)	(0.35		%)
Change in fair value of derivatives related to fixed-indexed annuities	(0.27		%)	0.73		%
Unlocking	(0.06		%)	0.03		%
Net spread earned on fixed annuities	1.21		%	1.82		%

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The table below illustrates the impact of fair value accounting for derivatives related to fixed-indexed annuities on the annuity segment’s net spread earned on fixed annuities:

	Three months ended December 31,
	2017		2016
Net spread earned on fixed annuities — before impact of derivatives related to FIAs	1.34	%	1.42	%
Impact of derivatives related to fixed-indexed annuities:
Change in fair value of derivatives	(0.27	%)	0.73	%
Related impact on amortization of DPAC (*)	0.14	%	(0.31	%)
Related impact on amortization of deferred sales inducements (*)	—	%	(0.02	%)
Net spread earned on fixed annuities	1.21	%	1.82	%

(*) An estimate of the related acceleration/deceleration of the amortization of deferred policy acquisition costs and deferred sales inducements.

Annuity Net Investment Income

Net investment income for the fourth quarter of 2017 was $376 million compared to $346 million for the fourth quarter of 2016, an increase of $30 million (9%). This increase reflects the growth in AFG’s annuity business, partially offset by the impact of lower investment yields. The overall yield earned on investments in AFG’s fixed annuity operations, calculated as net investment income divided by average investment balances (at amortized cost), decreased by 0.10 percentage points to 4.62% from 4.72% in the fourth quarter of 2017 compared to the fourth quarter of 2016. This decrease in net investment yield reflects (i) the investment of new premium dollars at lower yields as compared to the existing investment portfolio and (ii) the impact of the reinvestment of proceeds from maturity and redemption of higher yielding investments at the lower yields available in the financial markets, partially offset by higher equity in the earnings of limited partnerships and similar investments and favorable investment income resulting from early redemptions and other items. During the full year of 2017, $4.9 billion in annuity segment investments with an average yield of 5.14% were redeemed or sold while the investments purchased during 2017 (with new premium dollars and the redemption/sale proceeds) had an average yield at purchase of 3.94%.

Annuity Interest Credited — Fixed

Interest credited — fixed for the fourth quarter of 2017 was $164 million compared to $148 million for the fourth quarter of 2016, an increase of $16 million (11%). The impact of growth in the annuity business was partially offset by lower interest crediting rates on new premiums as compared to the crediting rates on policyholder funds surrendered or withdrawn. The average interest rate credited to policyholders, calculated as interest credited divided by average fixed annuity benefits accumulated, decreased0.02 percentage points to 2.00% in the fourth quarter of 2017 from 2.02% in the fourth quarter of 2016.

Annuity Net Interest Spread

AFG’s net interest spread decreased0.08 percentage points to 2.62% from 2.70% in the fourth quarter of 2017 compared to the same period in 2016 due primarily to the impact of lower fixed maturity investment yields, partially offset by the impact of lower crediting rates. Features included in current annuity product offerings allow AFG to achieve its desired profitability at a lower net interest spread than historical product offerings. As a result, AFG expects its net interest spread to narrow in the future.

Annuity Policy Charges and Other Miscellaneous Income

Annuity policy charges and other miscellaneous income, which consist primarily of surrender charges, amortization of deferred upfront policy charges (unearned revenue) and income from sales of real estate were $7 million in the fourth quarter of 2017 compared to $13 million in the fourth quarter of 2016, a decrease of $6 million (46%). Excluding the impact of unlocking charges of $3 million in the fourth quarter of 2017 and $1 million in the fourth quarter of 2016 related to unearned revenue, annuity policy charges and other miscellaneous income were $10 million in the fourth quarter of 2017 compared to $14 million in the fourth quarter of 2016, a decrease of $4 million (29%). The fourth quarter of 2016 includes $2 million from the sale of real estate. Excluding the impact of unlocking charges related to unearned revenue, annuity policy charges and other miscellaneous income as a percentage of average fixed annuity benefits accumulated decreased 0.05 percentage points to 0.10% in the fourth quarter of 2017 from 0.15% in the fourth quarter of 2016.

See “Annuity Unlocking” below for a discussion of the impact that the periodic review of actuarial assumptions had on annuity policy charges and other miscellaneous income.

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Other Annuity Benefits, Net of Guaranteed Withdrawal Benefit Fees

Other annuity benefits, net of guaranteed withdrawal benefit fees (excluding the impact of unlocking) for the fourth quarter of 2017 were $18 million compared to $28 million for the fourth quarter of 2016, a decrease of $10 million (36%). As a percentage of average fixed annuity benefits accumulated, these net expenses decreased0.17 percentage points to 0.21% from 0.38% in the fourth quarter of 2017 compared to the fourth quarter of 2016. In addition to interest credited to policyholders’ accounts and the change in fair value of derivatives related to fixed-indexed annuities, annuity benefits expense also includes the following expenses (in millions, net of guaranteed withdrawal benefit fees):

	Three months ended December 31,
	2017			2016
Change in expected death and annuitization reserve	$	5		$	4
Amortization of sales inducements	5			7
Change in guaranteed withdrawal benefit reserve	16			20
Change in other benefit reserves	9			11
Other annuity benefits	35			42
Offset guaranteed withdrawal benefit fees	(17		)	(14		)
Other annuity benefits, net	$	18		$	28

As discussed under “Annuity Benefits Accumulated” in Note A — “Accounting Policies” to the financial statements, guaranteed withdrawal benefit reserves are accrued for and modified using assumptions similar to those used in establishing and amortizing deferred policy acquisition costs. The guaranteed withdrawal benefit reserve related to FIAs can be inversely impacted by the calculated FIA embedded derivative reserve as the value to policyholders of the guaranteed withdrawal benefits decreases when the benefit of stock market participation increases.

The $10 million decrease in other annuity benefits, net of guaranteed withdrawal benefit fees in the fourth quarter of 2017 compared to the fourth quarter of 2016 reflects the impact of the increase in the fair value of the FIA embedded derivative reserve resulting from lower than anticipated interest rates on the guaranteed withdrawal benefits.

See “Annuity Unlocking” below for a discussion of the impact that the periodic review of actuarial assumptions had on annuity benefits expense.

Annuity Acquisition Expenses

Excluding the impact of unlocking charges (expense reductions) discussed under “Annuity Unlocking”below, AFG’s amortization of DPAC and commission expenses as a percentage of average fixed annuity benefits accumulated was 0.60% for the fourth quarter of 2017 compared to 1.06% for the fourth quarter of 2016 and has generally ranged between 0.75% and 0.85%. Variances from the general range relate primarily to the impact of (i) material changes in interest rates or the stock market on AFG’s fixed-indexed annuity business, and (ii) differences in actual experience from actuarially projected estimates and assumptions. For example, the negative impact of the lower than anticipated interest rates during the fourth quarter of 2017 on the fair value of derivatives related to fixed-indexed annuities (discussed below) resulted in a partially offsetting deceleration in the amortization of DPAC. In contrast, the positive impact of significantly higher than anticipated interest rates in the fourth quarter of 2016 on the fair value of derivatives related to fixed-indexed annuities resulted in a partially offsetting acceleration in the amortization of DPAC.

The table below illustrates the estimated impact of fair value accounting for derivatives related to fixed-indexed annuities on annuity acquisition expenses as a percentage of average fixed annuity benefits accumulated:

	Three months ended December 31,
	2017		2016
Before the impact of changes in the fair value of derivatives related to FIAs on the amortization of DPAC	0.74	%	0.75	%
Impact of changes in fair value of derivatives related to FIAs on the amortization of DPAC (*)	(0.14	%)	0.31	%
Annuity acquisition expenses as a % of fixed annuity benefits accumulated	0.60	%	1.06	%

(*) An estimate of the acceleration/deceleration in the amortization of deferred policy acquisition costs resulting from fair value accounting for derivatives related to fixed-indexed annuities.

See “Annuity Unlocking” below for a discussion of the impact that the periodic review of actuarial assumptions had on annuity and supplemental insurance acquisition expenses. Unanticipated spread compression, decreases in the stock market, adverse

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mortality experience, and higher than expected lapse rates could lead to future write-offs of DPAC or the present value of future profits on business in force of companies acquired (“PVFP”).

Annuity Other Expenses

Annuity other expenses were $31 million for the fourth quarter of 2017 compared to $27 million for the fourth quarter of 2016, an increase of $4 million (15%). Annuity other expenses represent primarily general and administrative expenses, as well as selling and issuance expenses that are not deferred. The increase in annuity other expenses reflects primarily growth in the business and an increase in the number of sales personnel focused on new initiatives and increased market share within existing financial institutions and retail marketing organizations in the fourth quarter of 2017 compared to the fourth quarter of 2016. As a percentage of average fixed annuity benefits accumulated, these expenses increased0.02 percentage points to 0.37% from 0.35% for the fourth quarter of 2017 as compared to the fourth quarter of 2016.

Change in Fair Value of Derivatives Related to Fixed-Indexed Annuities

AFG’s fixed-indexed annuities provide policyholders with a crediting rate tied, in part, to the performance of an existing stock market or other financial index. AFG attempts to mitigate the risk in the index-based component of these products through the purchase of call options on the appropriate index. AFG’s strategy is designed so that the change in the fair value of the call option assets will generally offset the economic change in the liabilities from the index participation. Both the index-based component of the annuities (an embedded derivative) and the related call options are considered derivatives that must be adjusted for changes in fair value through earnings each period. The fair values of these derivatives are impacted by actual and expected stock market performance and interest rates as well as other factors. For a list of other factors impacting the fair value of the index-based component (embedded derivative) of AFG’s annuity benefits accumulated, see Note D — “Fair Value Measurements” to the financial statements. In addition, the change in the fair value of the embedded derivative includes interest accreted on the FIA embedded derivative reserve of $5 million in the fourth quarter of 2017 and $2 million in the fourth quarter of 2016 (before the related impact on the amortization of deferred sales inducements and deferred policy acquisition costs).

Excluding the impact of unlocking charges, the net change in fair value of derivatives related to fixed-indexed annuities increased annuity benefits by $22 million in the fourth quarter of 2017 and decreased annuity benefits by $54 million in the fourth quarter of 2016. The $22 million increase in annuity benefits in the fourth quarter of 2017 reflects the negative impact of lower than anticipated interest rates on the fair value of these derivatives, partially offset by the positive impact of strong stock market performance. The $54 million decrease in annuity benefits in the fourth quarter of 2016 reflects the positive impact of significantly higher than anticipated interest rates and strong stock market performance on the fair value of these derivatives. As a percentage of average fixed annuity benefits accumulated, this net expense decreased 1.00 percentage points to 0.27% in the fourth quarter of 2017 from a net expense reduction of 0.73% in the fourth quarter of 2016.

Fluctuations in interest rates and the stock market, among other factors, can cause volatility in the periodic measurement of fair value of the embedded derivative that management believes can be inconsistent with the long-term economics of these products. The table below illustrates the impact of fair value accounting for derivatives related to fixed-indexed annuities on the annuity segment’s earnings before income taxes (dollars in millions):

	Three months ended December 31,
	2017			2016			% Change
Earnings before income taxes — before change in fair value of derivatives related to FIAs	$	108		$	103		5	%
Change in fair value of derivatives related to FIAs	(22		)	54			(141	%)
Related impact on amortization of DPAC (*)	11			(25		)	(144	%)
Earnings before income taxes	$	97		$	132		(27	%)

(*) An estimate of the related acceleration/deceleration of amortization of deferred sales inducements and deferred policy acquisition costs.

As illustrated in the table above, the change in fair value of derivatives related to fixed-indexed annuities, including the related impact on amortization of DPAC, decreased the annuity segment’s earnings before income taxes by $11 million in the fourth quarter of 2017 and increased the annuity segment’s earnings before income taxes by $29 million in the fourth quarter of 2016.

See “Annuity Unlocking” below for a discussion of the impact that the periodic review of actuarial assumptions had on the change in the fair value of the embedded derivative liability.

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Annuity Net Spread Earned on Fixed Annuities

AFG’s net spread earned on fixed annuities decreased0.61 percentage points to 1.21% from 1.82% in the fourth quarter of 2017 compared to the same period in 2016 due primarily to the net impact of changes in the fair value of derivatives and related DPAC amortization offset discussed above.

Annuity Benefits Accumulated

Annuity premiums received and benefit payments are recorded as increases or decreases in annuity benefits accumulated rather than as revenue and expense. Increases in this liability for interest credited and other benefits are charged to expense and decreases for surrender and other policy charges are credited to other income.

For certain products, annuity benefits accumulated also includes reserves for accrued persistency and premium bonuses, excess benefits expected to be paid on future deaths and annuitizations (“EDAR”) and guaranteed withdrawal benefits. Annuity benefits accumulated also includes amounts advanced from the Federal Home Loan Bank of Cincinnati. The following table is a progression of AFG’s annuity benefits accumulated liability for the three months ended December 31, 2017 and 2016 (in millions):

	Three months ended December 31,
	2017			2016
Beginning fixed annuity reserves	$	32,354		$	28,853
Fixed annuity premiums (receipts)	903			1,103
Federal Home Loan Bank paydowns	(64		)	—
Surrenders, benefits and other withdrawals	(596		)	(524		)
Interest and other annuity benefit expenses:
Interest credited	164			148
Embedded derivative mark-to-market	178			6
Change in other benefit reserves	25			34
Unlocking	41			27
Ending fixed annuity reserves	$	33,005		$	29,647
Reconciliation to annuity benefits accumulated per balance sheet:
Ending fixed annuity reserves (from above)	$	33,005		$	29,647
Impact of unrealized investment gains	133			76
Fixed component of variable annuities	178			184
Annuity benefits accumulated per balance sheet	$	33,316		$	29,907

Statutory Annuity Premiums

AFG’s annuity operations generated statutory premiums of $909 million in the fourth quarter of 2017 compared to $1.11 billion in the fourth quarter of 2016, a decrease of $202 million (18%). The following table summarizes AFG’s annuity sales (dollars in millions):

	Three months ended December 31,
	2017		2016		% Change
Financial institutions single premium annuities — indexed	$	364	$	474	(23	%)
Financial institutions single premium annuities — fixed	63		152		(59	%)
Retail single premium annuities — indexed	413		415		—	%
Retail single premium annuities — fixed	22		22		—	%
Education market — fixed and indexed annuities	41		40		3	%
Total fixed annuity premiums	903		1,103		(18	%)
Variable annuities	6		8		(25	%)
Total annuity premiums	$	909	$	1,111	(18	%)

Management attributes the 18% decrease in annuity premiums to AFG’s adherence to pricing discipline in a relatively low and decreasing interest rate environment during the year.

AFG continues to implement product and process changes needed to comply with the Department of Labor (“DOL”) Fiduciary Rule. Although the DOL Fiduciary Rule became effective on June 9, 2017, the DOL delayed certain requirements until

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January 1, 2018. As a result, insurance-only agents were able to continue selling fixed-indexed annuities through the end of 2017, provided the agent acted in the customer’s best interest, made no misleading statements and received only reasonable compensation. The DOL recently released a proposal to delay full implementation until July 1, 2019. There is uncertainty as to whether the rule will take effect in its current form on that date.

AFG believes the biggest impact of the rule will be on insurance-only licensed agents whose qualified sales represented approximately 10% of its fourth quarter 2017 annuity premiums. AFG’s management continues to believe that full implementation is likely to cause some short-term disruption in annuity premiums. Nonetheless, management does not believe the new rule will have a material impact on AFG’s results of operations.

Annuity Unlocking

In the fourth quarters of 2017 and 2016, AFG conducted a detailed review (“unlocking”) of the major actuarial assumptions underlying its annuity operations. As a result of these reviews, AFG recorded a net charge related to its annuity business of $3 million in 2017 and a net expense reduction of $1 million in 2016, which impacted AFG’s financial statements as follows (in millions):

	Three months ended December 31,
	2017			2016
Policy charges and other miscellaneous income:
Unearned revenue	$	(3	)	$	(1	)
Total revenues	(3		)	(1		)
Annuity benefits:
Fixed-indexed annuity embedded derivative	25			17
Sales inducements	(6		)	(4		)
Other reserves	16			10
Total annuity benefits	35			23
Annuity and supplemental insurance acquisition expenses:
Deferred policy acquisition costs	(35		)	(25		)
Total costs and expenses	—			(2		)
Net expense reduction (charge)	$	(3	)	$	1

The net charge from unlocking annuity assumptions in the fourth quarter of 2017 reflects the unfavorable impacts of a decrease in projected net interest spreads on in-force business (due primarily to lower than previously anticipated reinvestment rates), a slight increase in projected expenses (due primarily to an increase in projected trailer commissions) and slightly higher projected option costs in the near term, substantially offset by the favorable impact of changes in projected policyholder annuitization and lapse behavior. Reinvestment rate assumptions are based primarily on 7-year and 10-year corporate bond yields. For the 2017 unlocking, AFG assumed a net reinvestment rate (net of default and expense assumptions) of 3.99% in 2018, grading up ratably to an ultimate net reinvestment rate of 5.55% in 2023 and beyond.

The table below compares the reinvestment rate assumed on assets purchased to directly support “fixed annuity benefits accumulated” in AFG’s fourth quarter unlockings for the next calendar year to the actual reinvestment rate achieved in that period (both net of investment expenses):

	First
Unlocking	Investment	Reinvestment Rate
Year	Period	Assumed (*)		Achieved
2014	2015	3.75	%	4.27	%
2015	2016	4.05	%	4.27	%
2016	2017	4.42	%	3.95	%
2017	2018	4.17	%	n/a

(*) Assumed reinvestment rates exclude default rates of 0.18% in each period.

Management believes that these results over the last several years demonstrate that AFG’s investment rate assumptions are reasonable and prudently conservative. During 2017, long-term interest rates were lower than anticipated and credit spreads narrowed, resulting in a lower achieved reinvestment rate than assumed in the 2016 unlocking. In addition to the reinvestment rates above, actual default rates in 2017, 2016 and 2015 were lower than the long-term default rates of 0.18% assumed in the unlocking in each of the periods above.

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The 2016 net expense reduction reflects the favorable impact of an increase in projected net interest spreads on in-force business, substantially offset by the unfavorable impact of (i) changes in projected policyholder annuitization and lapse behavior, (ii) an increase in the risk premium for the uncertainty in the cash flows component of the discount rates used to value the FIA-related embedded derivative and (iii) a slight decrease in projected stock market growth over the next three years. For the 2016 unlocking, AFG assumed a net reinvestment rate (net of default and expense assumptions) of 4.24% in 2017, grading up ratably to an ultimate net reinvestment rate of 5.55% in 2022 and beyond.

Annuity Earnings before Income Taxes Reconciliation

The following table reconciles the net spread earned on AFG’s fixed annuities to overall annuity pretax earnings for the three months ended December 31, 2017 and 2016 (in millions):

	Three months ended December 31,
	2017			2016
Earnings on fixed annuity benefits accumulated	$	99		$	133
Earnings impact of investments in excess of fixed annuity benefits accumulated (*)	(5		)	—
Variable annuity earnings (loss)	3			(1		)
Earnings before income taxes	$	97		$	132

(*) Net investment income (as a % of investments) of 4.62% and 4.72% for the three months ended December 31, 2017 and 2016, respectively, multiplied by the difference between average fixed annuity investments (at amortized cost) and average fixed annuity benefits accumulated in each period.

Run-off Long-Term Care and Life Segment — Results of OperationsThe following table details AFG’s earnings before income taxes from its run-off long-term care and life operations for the three months ended December 31, 2017 and 2016 (dollars in millions):

	Three months ended December 31,
	2017		2016		% Change
Revenues:
Net earned premiums:
Long-term care	$	1	$	1	—	%
Life operations	4		5		(20	%)
Net investment income	4		6		(33	%)
Other income	3		—		—	%
Total revenues	12		12		—	%
Costs and Expenses:
Life, accident and health benefits:
Long-term care	1		—		—	%
Life operations	4		7		(43	%)
Acquisition expenses	2		1		100	%
Other expenses	3		2		50	%
Total costs and expenses	10		10		—	%
Earnings before income taxes	$	2	$	2	—	%

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Holding Company, Other and Unallocated — Results of Operations AFG’s net GAAP pretax loss outside of its insurance operations (excluding realized gains and losses) totaled $89 million for the fourth quarter of 2017 compared to $50 million for the fourth quarter of 2016, an increase of $39 million (78%). AFG’s net core pretax loss outside of its insurance operations (excluding realized gains and losses) totaled $49 million in the fourth quarter of 2017 compared to $50 million in the fourth quarter of 2016, a decrease of $1 million (2%).

The following table details AFG’s GAAP and core loss before income taxes from operations outside of its insurance operations for the three months ended December 31, 2017 and 2016 (dollars in millions):

	Three months ended December 31,
	2017			2016			% Change
Revenues:
Net investment income	$	6		$	—		—	%
Other income — P&C fees	20			17			18	%
Other income	2			8			(75	%)
Total revenues	28			25			12	%
Costs and Expenses:
Property and casualty insurance — commissions and other underwriting expenses	9			6			50	%
Interest charges on borrowed money	20			21			(5	%)
Other expense — expenses associated with P&C fees	11			11			—	%
Other expenses (*)	37			37			—	%
Total costs and expenses	77			75			3	%
Core loss before income taxes, excluding realized gains and losses	(49		)	(50		)	(2	%)
Pretax non-core loss on retirement of debt	(40		)	—			—	%
GAAP loss before income taxes, excluding realized gains and losses	$	(89	)	$	(50	)	78	%

(*) Excludes a pretax non-core loss on retirement of debt of $40 million in the fourth quarter of 2017.

Holding Company and Other — Net Investment Income

AFG recorded net investment income on investments held outside of its insurance operations of $6 million in the fourth quarter of 2017 compared to less than $1 million in the fourth quarter of 2016. The $6 million increase in the fourth quarter of 2017 as compared to the fourth quarter of 2016 is due primarily to the strong performance of certain fixed maturity investments.

Holding Company and Other — P&C Fees and Related Expenses

Summit, a workers’ compensation insurance subsidiary, collects fees from a small group of unaffiliated insurers for providing underwriting, policy administration and claims services. In addition, certain of AFG’s property and casualty businesses collect fees from customers for ancillary services such as workplace safety programs and premium financing. In the fourth quarter of 2017, AFG collected $20 million in fees for these services compared to $17 million in the fourth quarter of 2016. Management views this fee income, net of the $11 million in both the fourth quarter of 2017 and 2016, in expenses incurred to generate such fees, as a reduction in the cost of underwriting its property and casualty insurance policies. Consistent with internal management reporting, these fees and the related expenses are netted and recorded as a reduction of commissions and other underwriting expenses in AFG’s segmented results.

Holding Company and Other — Other Income

Other income in the table above includes $4 million and $5 million in the fourth quarter of 2017 and 2016, respectively, in management fees paid to AFG by the AFG-managed CLOs (AFG’s consolidated managed investment entities). The management fees are eliminated in consolidation — see the other income line in the Consolidate MIEs column under “Results of Operations — Segmented Statement of Earnings.” Excluding amounts eliminated in consolidation, AFG recorded a $2 million loss in other income outside of its insurance operations in the fourth quarter of 2017 due primarily to the disposal of equipment compared to income of $3 million outside of the insurance operations in the fourth quarter of 2016.

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Holding Company and Other — Interest Charges on Borrowed Money

AFG’s holding companies and other operations outside of its insurance operations recorded interest expense of $20 million in the fourth quarter of 2017 compared to $21 million in the fourth quarter of 2016, a decrease of $1 million (5%). This decrease reflects slightly higher average indebtedness, more than offset by lower average interest rates on outstanding debt. The following table details the principal amount of AFG’s long-term debt balances as of December 31, 2017 compared to December 31, 2016 (dollars in millions):

	December 31, 2017			December 31, 2016
Direct obligations of AFG:
4.50% Senior Notes due June 2047	$	590		$	—
3.50% Senior Notes due August 2026	425			300
9-7/8% Senior Notes due June 2019	—			350
6-3/8% Senior Notes due June 2042	—			230
5-3/4% Senior Notes due August 2042	—			125
6-1/4% Subordinated Debentures due September 2054	150			150
6% Subordinated Debentures due November 2055	150			150
Other	3			3
Total principal amount of Holding Company Debt	$	1,318		$	1,308
Weighted Average Interest Rate	4.6		%	6.5		%

The increase in average indebtedness for the fourth quarter of 2017 as compared to the fourth quarter of 2016 reflects the following financing transactions completed by AFG between October 1, 2016 and December 31, 2017:

• Issued $350 million of 4.50% Senior Notes on June 2, 2017

• Redeemed $230 million of 6-3/8% Senior Notes on June 26, 2017

• Redeemed $125 million of 5-3/4% Senior Notes on August 25, 2017

• Issued an additional $125 million of 3.50% Senior Notes on November 9, 2017

• Issued an additional $240 million of 4.50% Senior Notes on November 9, 2017

• Redeemed $350 million of 9-7/8% Senior Notes on December 11, 2017

Holding Company and Other — Loss on Retirement of Debt

On December 11, 2017, AFG redeemed its $350 million outstanding principal amount of 9-7/8% Senior Notes due 2019 and recorded a pretax loss on retirement of debt of $40 million, primarily a $38 million make-whole premium.

Holding Company and Other — Other Expenses

Excluding the loss on retirement of debt discussed above, AFG’s holding companies and other operations outside of its insurance operations recorded other expenses of $37 million in both the fourth quarter of 2017 and the fourth quarter of 2016.

Consolidated Realized Gains (Losses) on Securities AFG’s consolidated realized gains (losses) on securities, which are not allocated to segments, were gains of $6 million in the fourth quarter of 2017 compared to $51 million in the fourth quarter of 2016, a decrease of $45 million (88%). Realized gains (losses) on securities consisted of the following (in millions):

	Three months ended December 31,
	2017			2016
Realized gains (losses) before impairments:
Disposals	$	26		$	69
Change in the fair value of derivatives	(2		)	(9		)
Adjustments to annuity deferred policy acquisition costs and related items	2			—
	26			60
Impairment charges:
Securities	(23		)	(11		)
Adjustments to annuity deferred policy acquisition costs and related items	3			2
	(20		)	(9		)
Realized gains (losses) on securities	$	6		$	51

AFG’s impairment charges on securities for the fourth quarter of 2017 consist of $14 million on equity securities, $5 million on fixed maturities and $4 million on other investments compared to $10 million on equity securities and $1 million on fixed maturities in the fourth quarter of 2016. Approximately $11 million in impairment charges in the fourth quarter of 2017 are

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related to financial institutions and $4 million relate to investments in pharmaceutical companies. Approximately $7 million in impairment charges in the fourth quarter of 2016 are related to an equity investment in a pharmaceutical company.

Consolidated Income Taxes   AFG’s consolidated provision (credit) for income taxes was an expense of $101 million for the fourth quarter of 2017 compared to a benefit of $71 million in the fourth quarter of 2016, a decrease of $172 million (242%). The following is a reconciliation of income taxes at the statutory rate of 35% to the provision (credit) for income taxes as shown in the segmented statement of earnings (dollars in millions):

	Three months ended December 31,
	2017					2016
	Amount			% of EBT		Amount			% of EBT
Earnings before income taxes (“EBT”)	$	267				$	317
Income taxes at statutory rate	$	93		35	%	$	110		35	%
Effect of:
Tax exempt interest	(6		)	(2	%)	(6		)	(2	%)
Dividend received deduction	(2		)	(1	%)	(2		)	(1	%)
Stock-based compensation	(2		)	(1	%)	(9		)	(3	%)
Employee stock ownership plan dividend paid deduction	(3		)	(1	%)	(1		)	—	%
Foreign operations	14			5	%	1			—	%
Change in valuation allowance (excluding change in tax rate)	(23		)	(9	%)	12			4	%
Neon restructuring	(56		)	(21	%)	(111		)	(35	%)
Change in U.S. corporate tax rate	83			31	%	—			—	%
Acquisition of noncontrolling interest in NATL	—			—	%	(66		)	(21	%)
Other	3			2	%	1			1	%
Provision (credit) for income taxes	$	101		38	%	$	(71	)	(22	%)

The impact of “foreign operations” for the fourth quarter of 2017 in the table above relates to a reduction in the “foreign underwriting losses” deferred tax asset as a result of the sale of the noncontrolling interest in Neon. Since AFG maintains a full valuation allowance against the deferred tax assets related to Neon, this reduction in deferred tax assets was offset by a corresponding reduction in the valuation allowance and had no overall impact on AFG’s income tax expense or results of operations.

The changes in valuation allowance in the table above are primarily related to the cumulative losses in the Neon Lloyd’s insurance business. Due to the uncertainty concerning the realization of the deferred tax benefits associated with these losses, AFG maintains a full valuation allowance against these deferred tax assets. The $61 million decrease in the valuation allowance related to the change in the U.S. corporate tax rate is included in “Change in U.S. corporate tax rate” in the table above.

In connection with the reorganization of AFG’s Neon Lloyd’s business, in December 2016, AFG undertook a restructuring that included the liquidation for tax purposes of the foreign subsidiary that is the parent of the Neon Lloyd’s operations, resulting in a taxable loss on the liquidation on which AFG reported a $111 million tax benefit in the fourth quarter of 2016. An additional loss associated with the 2016 restructuring was deferred under U.S. tax laws, resulting in an unrecognized potential tax benefit of $48 million at December 31, 2016. On December 29, 2017, AFG entered into agreements under which certain Neon executives acquired an indirect noncontrolling interest in Neon. The sale of the noncontrolling interest in Neon resulted in the recognition for U.S. tax purposes of the loss deferred from the 2016 restructuring. AFG recorded a tax benefit of $56 million in the fourth quarter of 2017 related to the sale of the noncontrolling interest in Neon and the recognition of the previously deferred loss. See Note L — “Income Taxes” to the financial statements.

The Tax Cuts and Jobs Act of 2017 (“TCJA”), which lowers the U.S. corporate tax rate to 21% and makes other widespread changes to the U.S. tax code beginning in 2018, was enacted on December 22, 2017. Because the TCJA was enacted in December 2017, AFG recorded the $83 million decrease in its net deferred tax asset resulting from the changes in the tax code (primarily the lower corporate tax rate applicable to 2018 and future years) in the fourth quarter of 2017. See Note L — “Income Taxes” to the financial statements. Although accounting for the TCJA reduced AFG’s net deferred tax asset, management expects a net favorable future economic impact from the lower corporate income tax rate, including an expected effective tax rate in 2018 of approximately 20%.

As discussed in Note B — “Acquisitions and Sale of Businesses” to the financial statements, AFG acquired the noncontrolling interest in National Interstate Corporation in November 2016. This transaction allowed National Interstate and its subsidiaries

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to become members of the AFG consolidated tax group, which resulted in a tax benefit of $66 million to AFG during the fourth quarter of 2016.

Excluding the tax benefits related to the Neon restructuring, the impact of the change in the U.S. corporate tax rate and the tax benefit related to the acquisition of the noncontrolling interest in NATL, AFG’s effective tax rate was 28% for the three months ended December 31, 2017 and 34% for the three months ended December 31, 2016.

Consolidated Noncontrolling Interests   AFG’s consolidated net earnings attributable to noncontrolling interests was less than $1 million for the fourth quarter of 2017 compared to $3 million for the fourth quarter of 2016.

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RESULTS OF OPERATIONS — YEARS ENDED DECEMBER 31, 2017, 2016 AND 2015

Segmented Statement of Earnings   AFG reports its business as four segments: (i) Property and casualty insurance (“P&C”), (ii) Annuity, (iii) Run-off long-term care and life and (iv) Other, which includes holding company costs and income and expenses related to the managed investment entities (“MIEs”).

AFG’s net earnings attributable to shareholders, determined in accordance with GAAP, include certain items that may not be indicative of its ongoing core operations. The following tables for the years ended December 31, 2017, 2016 and 2015 identify such items by segment and reconcile net earnings attributable to shareholders to core net operating earnings, a non-GAAP financial measure that AFG believes is a useful tool for investors and analysts in analyzing ongoing operating trends (in millions):

									Other
	P&C			Annuity		Run-off long-term care and life			Consol. MIEs			Holding Co., other and unallocated			Total			Non-core reclass			GAAP Total
Year ended December 31, 2017
Revenues:
Property and casualty insurance net earned premiums	$	4,579		$	—	$	—		$	—		$	—		$	4,579		$	—		$	4,579
Life, accident and health net earned premiums	—			—		22			—			—			22			—			22
Net investment income	362			1,458		20			(23		)	14			1,831			—			1,831
Realized gains on securities	—			—		—			—			—			—			5			5
Income of MIEs:
Investment income	—			—		—			210			—			210			—			210
Gain on change in fair value of assets/liabilities	—			—		—			12			—			12			—			12
Other income	28			103		5			(18		)	88			206			—			206
Total revenues	4,969			1,561		47			181			102			6,860			5			6,865
Costs and Expenses:
Property and casualty insurance:
Losses and loss adjustment expenses	2,884			—		—			—			—			2,884			71			2,955
Commissions and other underwriting expenses	1,382			—		—			—			25			1,407			—			1,407
Annuity benefits	—			892		—			—			—			892			—			892
Life, accident and health benefits	—			—		26			—			—			26			—			26
Annuity and supplemental insurance acquisition expenses	—			168		5			—			—			173			—			173
Interest charges on borrowed money	—			—		—			—			85			85			—			85
Expenses of MIEs	—			—		—			181			—			181			—			181
Other expenses	41			121		10			—			175			347			75			422
Total costs and expenses	4,307			1,181		41			181			285			5,995			146			6,141
Earnings before income taxes	662			380		6			—			(183		)	865			(141		)	724
Provision for income taxes	219			128		2			—			(74		)	275			(28		)	247
Net earnings, including noncontrolling interests	443			252		4			—			(109		)	590			(113		)	477
Less: Net earnings attributable to noncontrolling interests	2			—		—			—			—			2			—			2
Core Net Operating Earnings	441			252		4			—			(109		)	588
Non-core earnings attributable to shareholders (a):
Realized gains on securities, net of tax	—			—		—			—			3			3			(3		)	—
Special A&E charges, net of tax	(58		)	—		—			—			(16		)	(74		)	74			—
Neon exited lines charge	18			—		—			—			—			18			(18		)	—
Loss on retirement of debt, net of tax	—			—		—			—			(33		)	(33		)	33			—
Tax benefit related to Neon restructuring	56			—		—			—			—			56			(56		)	—
Tax expense related to change in U.S. corporate tax rate	(88		)	25		(1		)	—			(19		)	(83		)	83			—
Net Earnings Attributable to Shareholders	$	369		$	277	$	3		$	—		$	(174	)	$	475		$	—		$	475

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								Other
	P&C			Annuity		Run-off long-term care and life		Consol. MIEs			Holding Co., other and unallocated			Total			Non-core reclass			GAAP Total
Year ended December 31, 2016
Revenues:
Property and casualty insurance net earned premiums	$	4,328		$	—	$	—	$	—		$	—		$	4,328		$	—		$	4,328
Life, accident and health net earned premiums	—			—		24		—			—			24			—			24
Net investment income	350			1,356		21		(37		)	6			1,696			—			1,696
Realized gains on:
Securities	—			—		—		—			—			—			19			19
Subsidiaries	—			—		—		—			—			—			2			2
Income of MIEs:
Investment income	—			—		—		190			—			190			—			190
Gain on change in fair value of assets/liabilities	—			—		—		15			—			15			—			15
Other income	19			103		4		(17		)	83			192			32			224
Total revenues	4,697			1,459		49		151			89			6,445			53			6,498
Costs and Expenses:
Property and casualty insurance:
Losses and loss adjustment expenses	2,669			—		—		—			—			2,669			93			2,762
Commissions and other underwriting expenses	1,322			—		—		—			19			1,341			8			1,349
Annuity benefits	—			800		—		—			—			800			—			800
Life, accident and health benefits	—			—		33		—			—			33			—			33
Annuity and supplemental insurance acquisition expenses	—			181		5		—			—			186			—			186
Interest charges on borrowed money	—			—		—		—			77			77			—			77
Expenses of MIEs	—			—		—		151			—			151			—			151
Other expenses	60			110		9		—			169			348			5			353
Total costs and expenses	4,051			1,091		47		151			265			5,605			106			5,711
Earnings before income taxes	646			368		2		—			(176		)	840			(53		)	787
Provision for income taxes	229			127		1		—			(67		)	290			(171		)	119
Net earnings, including noncontrolling interests	417			241		1		—			(109		)	550			118			668
Less: Net earnings attributable to noncontrolling interests	16			—		—		—			—			16			3			19
Core Net Operating Earnings	401			241		1		—			(109		)	534
Non-core earnings attributable to shareholders (a):
Realized gains on securities, net of tax and noncontrolling interests	—			—		—		—			13			13			(13		)	—
Realized gain on subsidiaries, net of tax	—			—		1		—			—			1			(1		)	—
Gain on sale of apartment property, net of tax and noncontrolling interests	15			—		—		—			—			15			(15		)	—
Special A&E charges, net of tax	(23		)	—		—		—			(3		)	(26		)	26			—
Neon exited lines charge	(65		)	—		—		—			—			(65		)	65			—
Tax benefit related to Neon restructuring	111			—		—		—			—			111			(111		)	—
Tax benefit related to National Interstate merger	66			—		—		—			—			66			(66		)	—
Net Earnings Attributable to Shareholders	$	505		$	241	$	2	$	—		$	(99	)	$	649		$	—		$	649

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									Other
	P&C			Annuity		Run-off long-term care and life			Consol. MIEs			Holding Co., other and unallocated			Total			Non-core reclass			GAAP Total
Year ended December 31, 2015
Revenues:
Property and casualty insurance net earned premiums	$	4,224		$	—	$	—		$	—		$	—		$	4,224		$	—		$	4,224
Life, accident and health net earned premiums	—			—		104			—			—			104			—			104
Net investment income	319			1,224		80			6			4			1,633			—			1,633
Realized losses on:
Securities	—			—		—			—			—			—			(19		)	(19		)
Subsidiaries	—			—		—			—			—			—			(161		)	(161		)
Income (loss) of MIEs:
Investment income	—			—		—			155			—			155			—			155
Gain (loss) on change in fair value of assets/liabilities	—			—		—			(34		)	—			(34		)	—			(34		)
Other income	12			98		4			(15		)	78			177			66			243
Total revenues	4,555			1,322		188			112			82			6,259			(114		)	6,145
Costs and Expenses:
Property and casualty insurance:
Losses and loss adjustment expenses	2,628			—		—			—			—			2,628			67			2,695
Commissions and other underwriting expenses	1,304			—		—			—			16			1,320			—			1,320
Annuity benefits	—			732		—			—			—			732			—			732
Life, accident and health benefits	—			—		131			—			—			131			—			131
Annuity and supplemental insurance acquisition expenses	—			163		16			—			—			179			—			179
Interest charges on borrowed money	2			—		—			—			73			75			—			75
Expenses of MIEs	—			—		—			112			—			112			—			112
Other expenses	44			96		27			—			153			320			16			336
Total costs and expenses	3,978			991		174			112			242			5,497			83			5,580
Earnings before income taxes	577			331		14			—			(160		)	762			(197		)	565
Provision for income taxes	199			113		5			—			(54		)	263			(68		)	195
Net earnings, including noncontrolling interests	378			218		9			—			(106		)	499			(129		)	370
Less: Net earnings attributable to noncontrolling interests	11			—		—			—			2			13			5			18
Core Net Operating Earnings	367			218		9			—			(108		)	486
Non-core earnings attributable to shareholders (a):
Realized losses on securities, net of tax and noncontrolling interests	—			—		—			—			(12		)	(12		)	12			—
Realized gain (loss) on subsidiaries, net of tax	—			—		(108		)	—			4			(104		)	104			—
Gain on sale of hotel and apartment property, net of tax and noncontrolling interests	36			—		—			—			—			36			(36		)	—
Special A&E charges, net of tax	(44		)	—		—			—			(8		)	(52		)	52			—
Loss on retirement of debt, net of tax	—			—		—			—			(2		)	(2		)	2			—
Net Earnings Attributable to Shareholders	$	359		$	218	$	(99	)	$	—		$	(126	)	$	352		$	—		$	352

(a) See the reconciliation of core earnings to GAAP net earnings under “Results of Operations — General” for details on the tax and noncontrolling interest impacts of these reconciling items.

Property and Casualty Insurance Segment — Results of Operations  AFG’s property and casualty insurance operations contributed $591 million in GAAP pretax earnings in 2017 compared to $577 million in 2016, an increase of $14 million (2%). Property and casualty core pretax earnings were $662 million in 2017 compared to $646 million in 2016, an increase of $16 million (2%). The increase in GAAP and core pretax earnings reflects higher underwriting profit in the Specialty casualty group, higher net investment income and lower other expenses, partially offset by lower underwriting profit in the Property and transportation and Specialty financial groups. The increase in GAAP pretax earnings also reflects the impact of a pretax non-core charge of $65 million in the second quarter of 2016 related to the exit of certain lines of business within Neon and favorable development of $18 million in the fourth quarter of 2017 in the Neon exited lines in connection with a reinsurance to

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close transaction, partially offset by the impact of a $32 million pretax non-core gain on the sale of an apartment property in the second quarter of 2016 and special A&E charges of $89 million in 2017 compared to $36 million in 2016.

AFG’s property and casualty insurance operations contributed $577 million in GAAP pretax earnings in 2016 compared to $576 million in 2015, an increase of $1 million. Property and casualty core pretax earnings were $646 million in 2016 compared to $577 million in 2015, an increase of $69 million (12%). The increase in GAAP and core pretax earnings reflects improved underwriting results in the Property and transportation group and higher net investment income, partially offset by lower underwriting profit in the Specialty casualty and Specialty financial groups. GAAP pretax earnings also reflect a pretax non-core charge of $65 million in the second quarter of 2016 related to the exit of certain lines of business within Neon and a $32 million pretax non-core gain on the sale of an apartment property in the second quarter of 2016 compared to a $51 million pretax non-core gain on the sale of a hotel in the second quarter of 2015 and a $15 million pretax non-core gain on the sale of an apartment property in the fourth quarter of 2015, as well as non-core special A&E charges of $36 million in 2016 compared to $67 million in 2015.

The following table details AFG’s GAAP and core earnings before income taxes from its property and casualty insurance operations for the years ended December 31, 2017, 2016 and 2015 (dollars in millions):

	Year ended December 31,									% Change
	2017			2016			2015			2017 - 2016		2016 - 2015
Gross written premiums	$	6,502		$	5,981		$	5,832		9	%	3	%
Reinsurance premiums ceded	(1,751		)	(1,595		)	(1,505		)	10	%	6	%
Net written premiums	4,751			4,386			4,327			8	%	1	%
Change in unearned premiums	(172		)	(58		)	(103		)	197	%	(44	%)
Net earned premiums	4,579			4,328			4,224			6	%	2	%
Loss and loss adjustment expenses (a)	2,884			2,669			2,628			8	%	2	%
Commissions and other underwriting expenses (b)	1,382			1,322			1,304			5	%	1	%
Core underwriting gain	313			337			292			(7	%)	15	%
Net investment income	362			350			319			3	%	10	%
Other income and expenses, net (c)	(13		)	(41		)	(34		)	(68	%)	21	%
Core earnings before income taxes	662			646			577			2	%	12	%
Pretax non-core special A&E charges	(89		)	(36		)	(67		)	147	%	(46	%)
Pretax non-core Neon exited lines charge	18			(65		)	—			(128	%)	—	%
Pretax non-core gain on sale of apartment properties and hotel	—			32			66			(100	%)	(52	%)
GAAP earnings before income taxes	$	591		$	577		$	576		2	%	—	%
(a) Excludes pretax non-core special A&E charges of $89 million, $36 million and $67 million in 2017, 2016 and 2015, respectively, a non-core charge of $57 million related to the exit of certain lines of business within Neon in 2016 and income of $18 million in 2017 representing favorable development related to the Neon exited lines in connection with a reinsurance to close transaction.
(b) Excludes a non-core charge of $8 million related to the exit of certain lines of business within Neon in 2016.
(c) Excludes pretax non-core gains of $32 million on the sale of an apartment property in 2016 and $51 million on the sale of a hotel and $15 million on the sale of an apartment property in 2015.
										Change
										2017 - 2016		2016 - 2015
Combined Ratios:
Specialty lines
Loss and LAE ratio	62.9		%	61.7		%	62.2		%	1.2	%	(0.5	%)
Underwriting expense ratio	30.2		%	30.6		%	30.9		%	(0.4	%)	(0.3	%)
Combined ratio	93.1		%	92.3		%	93.1		%	0.8	%	(0.8	%)
Aggregate — including exited lines
Loss and LAE ratio	64.5		%	63.8		%	63.8		%	0.7	%	—	%
Underwriting expense ratio	30.2		%	30.7		%	30.9		%	(0.5	%)	(0.2	%)
Combined ratio	94.7		%	94.5		%	94.7		%	0.2	%	(0.2	%)

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AFG reports the underwriting performance of its Specialty property and casualty insurance business in the following sub-segments: (i) Property and transportation, (ii) Specialty casualty and (iii) Specialty financial.

Gross Written Premiums

Gross written premiums (“GWP”) for AFG’s property and casualty insurance segment were $6.50 billion in 2017 compared to $5.98 billion in 2016, an increase of $521 million (9%). GWP increased$149 million (3%) in 2016 compared to 2015. Detail of AFG’s property and casualty gross written premiums is shown below (dollars in millions):

	Year ended December 31,												% Change
	2017				2016				2015				2017 - 2016		2016 - 2015
	GWP		%		GWP		%		GWP		%
Property and transportation	$	2,688	41	%	$	2,504	42	%	$	2,455	42	%	7	%	2	%
Specialty casualty	3,087		48	%	2,792		47	%	2,739		47	%	11	%	2	%
Specialty financial	727		11	%	685		11	%	637		11	%	6	%	8	%
Other specialty	—		—	%	—		—	%	1		—	%	—	%	(100	%)
	$	6,502	100	%	$	5,981	100	%	$	5,832	100	%	9	%	3	%

Reinsurance Premiums Ceded

Reinsurance premiums ceded (“Ceded”) for AFG’s property and casualty insurance segment were 27%, 27% and 26% of gross written premiums for the years ended December 31, 2017, 2016 and 2015, respectively. Detail of AFG’s property and casualty reinsurance premiums ceded is shown below (dollars in millions):

	Year ended December 31,															Change in % of GWP
	2017					2016					2015					2017 - 2016		2016 - 2015
	Ceded			% of GWP		Ceded			% of GWP		Ceded			% of GWP
Property and transportation	$	(923	)	34	%	$	(832	)	33	%	$	(819	)	33	%	1	%	—	%
Specialty casualty	(807		)	26	%	(756		)	27	%	(687		)	25	%	(1	%)	2	%
Specialty financial	(131		)	18	%	(113		)	16	%	(97		)	15	%	2	%	1	%
Other specialty	110					106					98
	$	(1,751	)	27	%	$	(1,595	)	27	%	$	(1,505	)	26	%	—	%	1	%

Net Written Premiums

Net written premiums (“NWP”) for AFG’s property and casualty insurance segment were $4.75 billion in 2017 compared to $4.39 billion in 2016, an increase of $365 million (8%). NWP increased$59 million (1%) in 2016 compared to 2015. Detail of AFG’s property and casualty net written premiums is shown below (dollars in millions):

	Year ended December 31,												% Change
	2017				2016				2015				2017 - 2016		2016 - 2015
	NWP		%		NWP		%		NWP		%
Property and transportation	$	1,765	37	%	$	1,672	38	%	$	1,636	38	%	6	%	2	%
Specialty casualty	2,280		48	%	2,036		46	%	2,052		47	%	12	%	(1	%)
Specialty financial	596		13	%	572		13	%	540		12	%	4	%	6	%
Other specialty	110		2	%	106		3	%	99		3	%	4	%	7	%
	$	4,751	100	%	$	4,386	100	%	$	4,327	100	%	8	%	1	%

Net Earned Premiums

Net earned premiums (“NEP”) for AFG’s property and casualty insurance segment were $4.58 billion in 2017 compared to $4.33 billion in 2016, an increase of $251 million (6%). NEP increased$104 million (2%) in 2016 compared to 2015. Detail of AFG’s property and casualty net earned premiums is shown below (dollars in millions):

	Year ended December 31,												% Change
	2017				2016				2015				2017 - 2016		2016 - 2015
	NEP		%		NEP		%		NEP		%
Property and transportation	$	1,711	37	%	$	1,662	38	%	$	1,599	38	%	3	%	4	%
Specialty casualty	2,186		48	%	2,006		46	%	2,011		48	%	9	%	—	%
Specialty financial	576		13	%	557		13	%	517		12	%	3	%	8	%
Other specialty	106		2	%	103		3	%	97		2	%	3	%	6	%
	$	4,579	100	%	$	4,328	100	%	$	4,224	100	%	6	%	2	%

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The $521 million (9%) increase in gross written premiums in 2017 compared to 2016 reflects growth in each of the Specialty property and casualty insurance sub-segments. Overall average renewal rates increased approximately 1% in 2017.

The $149 million (3%) increase in gross written premiums in 2016 compared to 2015 reflects growth in the Property and transportation, Specialty casualty and Specialty financial sub-segments. Overall average renewal rates were flat in 2016.

Property and transportation Gross written premiums increased$184 million (7%) in 2017 compared to 2016. This increase was the result of higher gross written premiums in the crop, transportation and property and inland marine businesses, and the Singapore branch. This growth was partially offset by lower premiums resulting from an exit from the customs bond business, which was part of the ocean marine operations. Average renewal rates increased approximately 3% for this group in 2017. Reinsurance premiums ceded as a percentage of gross written premiums increased1 percentage point in 2017 compared to 2016, reflecting a change in the mix of business and the impact of reinstatement premiums in 2017 resulting from reinsured hurricane losses.

Gross written premiums increased $49 million (2%) in 2016 compared to 2015. This increase was the result of higher premiums in the agricultural businesses, growth in the transportation businesses and higher gross written premiums from the Singapore branch, which opened for business in June 2015, partially offset by lower gross written premiums in the property and inland marine businesses. Average renewal rates increased approximately 3% for this group in 2016, including a 5% increase in National Interstate’s renewal rates. Reinsurance premiums ceded as a percentage of gross written premiums were comparable in 2016 and 2015.

Specialty casualty Gross written premiums increased$295 million (11%) in 2017 compared to 2016. New accounts written in the targeted markets businesses and higher gross written premiums at Neon, resulting from the growth of its portfolio in targeted classes of business were the primary drivers of the increase. Additionally, higher gross written premiums in the workers’ compensation businesses, primarily the result of rate increases in the state of Florida, coupled with growth in the executive liability and excess and surplus businesses contributed to the growth in gross written premiums in 2017. Average renewal rates were flat for this group in 2017. Reinsurance premiums ceded as a percentage of gross written premiums decreased1 percentage point in 2017 compared to 2016, reflecting a change in the mix of business.

Gross written premiums increased $53 million (2%) in 2016 compared to 2015. Higher gross written premiums in the excess and surplus, targeted markets and workers’ compensation businesses were partially offset by lower premiums in the general liability business and by Neon’s exit of certain lines of business and implementation of more stringent underwriting standards at Neon. Lower premiums in the general liability business were primarily the result of competitive market conditions, re-underwriting efforts within the Florida homebuilders market and the slowdown within the energy sector. Average renewal rates decreased approximately 1% for this group in 2016, including a decrease of approximately 4% in the workers’ compensation businesses. Excluding the workers’ compensation business, average renewal rates for this group increased approximately 1% during 2016. Reinsurance premiums ceded as a percentage of gross written premiums increased 2 percentage points in 2016 compared to 2015, reflecting the cession of Neon’s UK medical malpractice business and a change in the mix of business at Neon.

Specialty financial Gross written premiums increased$42 million (6%) in 2017 compared to 2016 due primarily to higher premiums in the lending and leasing, fidelity and surety businesses. Average renewal rates for this group decreased approximately 2% in 2017. Reinsurance premiums ceded as a percentage of gross written premiums increased2 percentage points in 2017 compared to 2016, reflecting higher cessions in the lending and leasing businesses.

Gross written premiums increased $48 million (8%) in 2016 compared to 2015 due primarily to growth in the financial institutions and surety businesses. Average renewal rates for this group decreased approximately 1% in 2016. Reinsurance premiums ceded as a percentage of gross written premiums increased 1 percentage point in 2016 compared to 2015, reflecting higher cessions in the financial institutions business, partially offset by a decline in auto dealer business, which is heavily reinsured.

Other specialty The amounts shown as reinsurance premiums ceded represent business assumed by AFG’s internal reinsurance program from the operations that make up AFG’s other Specialty property and casualty insurance sub-segments.

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Combined Ratio

The table below (dollars in millions) details the components of the combined ratio for AFG’s property and casualty insurance segment for 2017, 2016 and 2015:

	Year ended December 31,						Change				Year ended December 31,
	2017		2016		2015		2017 - 2016		2016 - 2015		2017		2016		2015
Property and transportation
Loss and LAE ratio	68.5	%	67.0	%	72.4	%	1.5	%	(5.4	%)
Underwriting expense ratio	22.5	%	23.0	%	24.5	%	(0.5	%)	(1.5	%)
Combined ratio	91.0	%	90.0	%	96.9	%	1.0	%	(6.9	%)
Underwriting profit											$	154	$	166	$	48
Specialty casualty
Loss and LAE ratio	64.5	%	65.8	%	62.9	%	(1.3	%)	2.9	%
Underwriting expense ratio	30.7	%	30.3	%	29.8	%	0.4	%	0.5	%
Combined ratio	95.2	%	96.1	%	92.7	%	(0.9	%)	3.4	%
Underwriting profit											$	104	$	78	$	146
Specialty financial
Loss and LAE ratio	39.4	%	32.0	%	29.7	%	7.4	%	2.3	%
Underwriting expense ratio	50.0	%	52.9	%	53.4	%	(2.9	%)	(0.5	%)
Combined ratio	89.4	%	84.9	%	83.1	%	4.5	%	1.8	%
Underwriting profit											$	61	$	84	$	87
Total Specialty
Loss and LAE ratio	62.9	%	61.7	%	62.2	%	1.2	%	(0.5	%)
Underwriting expense ratio	30.2	%	30.6	%	30.9	%	(0.4	%)	(0.3	%)
Combined ratio	93.1	%	92.3	%	93.1	%	0.8	%	(0.8	%)
Underwriting profit											$	317	$	337	$	295
Aggregate — including exited lines
Loss and LAE ratio	64.5	%	63.8	%	63.8	%	0.7	%	—	%
Underwriting expense ratio	30.2	%	30.7	%	30.9	%	(0.5	%)	(0.2	%)
Combined ratio	94.7	%	94.5	%	94.7	%	0.2	%	(0.2	%)
Underwriting profit											$	242	$	236	$	225

The Specialty property and casualty insurance operations generated an underwriting profit of $317 million in 2017 compared to $337 million in 2016, a decrease of $20 million (6%). The lower underwriting profit in 2017 as compared to 2016 reflects lower underwriting profit in the Property and transportation and Specialty financial insurance sub-segments, partially offset by higher underwriting profit in the Specialty casualty insurance sub-segment. Results for each of the Specialty property and casualty insurance sub-segments reflect higher catastrophe losses in 2017 compared to 2016. Overall catastrophe losses were $140 million (3.0 points on the combined ratio) for 2017 compared to $55 million (1.3 points) for 2016. In connection with catastrophe losses incurred in 2017, AFG reduced profit-based commissions payable to agents by $8 million in the Specialty financial sub-segment and paid $10 million in net reinstatement premiums, resulting in a total pretax loss from catastrophes of $142 million in 2017.

The Specialty property and casualty insurance operations generated an underwriting profit of $337 million in 2016 compared to $295 million in 2015, an increase of $42 million (14%). The higher underwriting profit in 2016 reflects higher underwriting profit in the Property and transportation sub-segment, partially offset by lower underwriting profit in the Specialty casualty and Specialty financial sub-segments. Overall catastrophe losses were $55 million (1.3 points on the combined ratio) in 2016 compared to $35 million (0.8 points) in 2015.

Property and transportation Underwriting profit for this group was $154 million in 2017 compared to $166 million in 2016, a decrease of $12 million (7%). Lower underwriting profits in the crop and ocean marine businesses were the primary drivers of these lower results, partially offset by higher underwriting profit in the transportation businesses. The crop insurance operations reported strong underwriting profitability in 2017, albeit at lower levels than in 2016. Catastrophe losses were $36 million (2.1 points on the combined ratio) and related reinstatement premiums were $2 million in 2017 compared to catastrophe losses of $31 million (1.9 points) in 2016.

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Underwriting profit for this group was $166 million in 2016 compared to $48 million in 2015, an increase of $118 million (246%). This improvement reflects higher underwriting profit in the crop insurance business, primarily the result of favorable growing conditions and relatively stable commodity pricing and higher underwriting profits in the transportation and property and inland marine businesses. These improved results were partially offset by an increase of $10 million in catastrophe losses in 2016 compared to 2015.

Specialty casualty Underwriting profit for this group was $104 million in 2017 compared to $78 million in 2016, an increase of $26 million (33%), reflecting favorable reserve development within Neon, including the portion of the 2015 and prior years reinsurance to close transaction attributed to ongoing lines of business, and higher underwriting profit in the excess and surplus lines and workers’ compensation businesses. These improved results were partially offset by lower underwriting profit in the executive liability business, due primarily to lower favorable prior year reserve development, adverse prior year reserve development in the targeted markets operations and higher catastrophe losses. Catastrophe losses were $71 million (3.3 points on the combined ratio) and related net reinstatement premiums were $6 million in 2017 compared to catastrophe losses of $10 million (0.5 points) in 2016.

Underwriting profit for this group was $78 million in 2016 compared to $146 million in 2015, a decrease of $68 million (47%). Higher underwriting profitability in the workers’ compensation businesses, due primarily to higher favorable prior year reserve development, and improved results in the general liability business were more than offset by adverse prior year reserve development in the excess and surplus and targeted markets businesses, current accident year trade credit losses in Neon’s political risk and trade credit business and higher catastrophe losses.

Specialty financial Underwriting profit for this group was $61 million in 2017 compared to $84 million in 2016, a decrease of $23 million (27%), reflecting lower underwriting profitability in the financial institutions business due primarily to higher catastrophe losses and adverse prior year reserve development. Catastrophe losses were $30 million (5.2 points on the combined ratio) in 2017 compared to $11 million (2.0 points) in 2016. In connection with catastrophe losses incurred in 2017, the Specialty financial sub-segment reduced profit-based commissions payable to agents by $8 million (1.1 points on the combined ratio) and paid $2 million in reinstatement premiums.

Underwriting profit for this group was $84 million in 2016 compared to $87 million in 2015, a decrease of $3 million (3%). Higher underwriting profit in the fidelity and surety businesses, primarily the result of higher favorable prior year reserve development, was more than offset by lower underwriting profit in the financial institutions and trade credit businesses, resulting primarily from lower favorable prior year reserve development.

Other specialty This group reported an underwriting loss of $2 million in 2017 compared to underwriting profit of $9 million in 2016, a decrease of $11 million (122%). The decrease is due primarily to a $14 million charge to adjust the deferred gain on the retroactive reinsurance transaction entered into in connection with the sale of businesses in 1998.

Underwriting profit for this group was $9 million in 2016 compared to $14 million in 2015, a decrease of $5 million (36%). The decrease is due primarily to lower favorable prior year loss development in the business assumed by AFG’s internal reinsurance program from the operations that make up AFG’s other Specialty sub-segments.

Aggregate Aggregate underwriting results for AFG’s property and casualty insurance segment include the asbestos and environmental reserve charges and the Neon exited lines charge and favorable development in the Neon exited lines discussed below under “Net prior year reserve development.”

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Losses and Loss Adjustment Expenses

AFG’s overall loss and LAE ratio was 64.5% in 2017 and 63.8% in 2016 and 2015. The components of AFG’s property and casualty losses and LAE amounts and ratio are detailed below (dollars in millions):

	Year ended December 31,
	Amount									Ratio						Change in Ratio
	2017			2016			2015			2017		2016		2015		2017 - 2016		2016 - 2015
Property and transportation
Current year, excluding catastrophe losses	$	1,176		$	1,104		$	1,123		68.7	%	66.3	%	70.2	%	2.4	%	(3.9	%)
Prior accident years development	(40		)	(21		)	15			(2.3	%)	(1.2	%)	0.9	%	(1.1	%)	(2.1	%)
Current year catastrophe losses	36			31			21			2.1	%	1.9	%	1.3	%	0.2	%	0.6	%
Property and transportation losses and LAE and ratio	$	1,172		$	1,114		$	1,159		68.5	%	67.0	%	72.4	%	1.5	%	(5.4	%)
Specialty casualty
Current year, excluding catastrophe losses	$	1,425		$	1,323		$	1,272		65.2	%	66.0	%	63.2	%	(0.8	%)	2.8	%
Prior accident years development	(86		)	(13		)	(11		)	(4.0	%)	(0.7	%)	(0.5	%)	(3.3	%)	(0.2	%)
Current year catastrophe losses	71			10			4			3.3	%	0.5	%	0.2	%	2.8	%	0.3	%
Specialty casualty losses and LAE and ratio	$	1,410		$	1,320		$	1,265		64.5	%	65.8	%	62.9	%	(1.3	%)	2.9	%
Specialty financial
Current year, excluding catastrophe losses	$	218		$	190		$	175		37.8	%	34.0	%	33.7	%	3.8	%	0.3	%
Prior accident years development	(21		)	(23		)	(30		)	(3.6	%)	(4.0	%)	(5.7	%)	0.4	%	1.7	%
Current year catastrophe losses	30			11			9			5.2	%	2.0	%	1.7	%	3.2	%	0.3	%
Specialty financial losses and LAE and ratio	$	227		$	178		$	154		39.4	%	32.0	%	29.7	%	7.4	%	2.3	%
Total Specialty
Current year, excluding catastrophe losses	$	2,879		$	2,675		$	2,627		62.9	%	61.8	%	62.2	%	1.1	%	(0.4	%)
Prior accident years development	(139		)	(61		)	(37		)	(3.0	%)	(1.4	%)	(0.8	%)	(1.6	%)	(0.6	%)
Current year catastrophe losses	140			55			35			3.0	%	1.3	%	0.8	%	1.7	%	0.5	%
Total Specialty losses and LAE and ratio	$	2,880		$	2,669		$	2,625		62.9	%	61.7	%	62.2	%	1.2	%	(0.5	%)
Aggregate — including exited lines
Current year, excluding catastrophe losses	$	2,879		$	2,675		$	2,627		62.9	%	61.8	%	62.2	%	1.1	%	(0.4	%)
Prior accident years development	(64		)	32			33			(1.4	%)	0.7	%	0.8	%	(2.1	%)	(0.1	%)
Current year catastrophe losses	140			55			35			3.0	%	1.3	%	0.8	%	1.7	%	0.5	%
Aggregate losses and LAE and ratio	$	2,955		$	2,762		$	2,695		64.5	%	63.8	%	63.8	%	0.7	%	—	%

Current accident year losses and LAE, excluding catastrophe losses

The current accident year loss and LAE ratio, excluding catastrophe losses for AFG’s Specialty property and casualty insurance operations was 62.9% in 2017, 61.8% in 2016 and 62.2% in 2015.

Property and transportation   The 2.4 percentage points increase in the loss and LAE ratio for the current year, excluding catastrophe losses reflects an increase in the loss and LAE ratio of the crop and property and inland marine businesses and the Singapore branch in 2017 compared to 2016.

The 3.9 percentage points improvement in the loss and LAE ratio for the current year, excluding catastrophe losses in 2016 compared to 2015 reflects a decrease in the loss and LAE ratio of the crop, equine, transportation and property and inland marine businesses and the Singapore branch.

Specialty casualty   The 0.8 percentage points improvement in the loss and LAE ratio for the current year, excluding catastrophe losses reflects a decrease in the loss and LAE ratio at Neon.

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The 2.8 percentage point increase in the loss and LAE ratio for the current year, excluding catastrophe losses in 2016 compared to 2015 reflects an increase in current accident year trade credit losses in Neon’s political risk and trade credit business and an increase in the loss and LAE ratio of the targeted markets, general liability and excess and surplus businesses.

Specialty financial   The 3.8 percentage points increase in the loss and LAE ratio for the current year, excluding catastrophe losses in 2017 compared to 2016 reflects an increase in the loss and LAE ratio of the financial institutions business.

The loss and LAE ratio for the current year, excluding catastrophe losses is comparable in 2016 and 2015.

Net prior year reserve development

AFG’s Specialty property and casualty insurance operations recorded net favorable reserve development related to prior accident years of $139 million in 2017 compared to $61 million in 2016 and $37 million in 2015, an increase of $78 million (128%) and $24 million (65%), respectively.

Property and transportation Net favorable reserve development of $40 million in 2017 reflects lower than expected losses in the crop and equine businesses and lower than expected claim severity in the property and inland marine and transportation businesses, partially offset by higher than expected claim frequency and severity in the ocean marine business.

Net favorable reserve development of $21 million in 2016 reflects lower than expected losses in the crop operations and lower than expected claim severity in the property and inland marine and trucking businesses, partially offset by reserve strengthening at National Interstate and higher than expected claim frequency in the ocean marine business.

Net adverse reserve development of $15 million in 2015 reflects higher than expected claim severity at National Interstate and higher than anticipated claim frequency in the ocean marine business, partially offset by lower than expected claim severity in the property and inland marine business, agricultural operations and a run-off book of homebuilders business.

Specialty casualty Net favorable reserve development of $86 million in 2017 includes favorable reserve development on ongoing lines of business within Neon recorded in connection with the reinsurance to close agreement entered into in December 2017 for the 2015 and prior years of account, lower than anticipated claim severity in the workers’ compensation businesses and lower than expected losses in the executive liability business, partially offset by higher than anticipated claim severity in the targeted markets and general liability businesses and higher than anticipated severity in New York contractor claims.

In the fourth quarter of 2017, Neon entered into a reinsurance to close agreement for its 2015 and prior years of account, which transfers the responsibility for all of the liabilities that attach to the transferred year of account as well as any income due to the closing year of account in return for a premium. As a result of the reinsurance to close agreement, Neon recorded favorable development of $42 million, of which $24 million related to its ongoing lines of business (included in Specialty casualty) and $18 million related to the exited lines of business (discussed below and included in Neon exited lines charge).

Net favorable reserve development of $13 million in 2016 reflects lower than anticipated claim frequency and severity in workers’ compensation business, lower than expected claim severity in directors and officers liability insurance and lower than expected claim frequency and severity in excess liability business, partially offset by adverse reserve development at Neon, higher than anticipated severity in New York contractor claims, higher than anticipated claim frequency and severity in general liability insurance and higher than expected claim frequency and severity in the targeted markets business.

Net favorable reserve development of $11 million in 2015 includes lower than anticipated claim severity in workers’ compensation business, lower than anticipated claim severity and frequency in excess liability insurance and lower than expected claim severity in directors and officers liability insurance, partially offset by adverse reserve development at Neon.

Specialty financial Net favorable reserve development of $21 million in 2017 reflects lower than anticipated claim severity in the fidelity business and lower than expected claim frequency and severity in the surety business.

Net favorable reserve development of $23 million in 2016 reflects lower than anticipated claim severity in the fidelity business, lower than expected claim frequency and severity in the surety business and lower than anticipated claim frequency in the financial institutions business.

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Net favorable reserve development of $30 million in 2015 reflects lower than anticipated claim frequency and severity in the surety business and products for financial institutions and lower than expected claim severity in the fidelity business and run-off collateral value insurance.

Other specialty In addition to the reserve development discussed above, total Specialty prior year reserve development includes net adverse reserve development of $8 million in 2017 and net favorable reserve development of $4 million in 2016 and $11 million in 2015. The adverse reserve development in 2017 reflects a $14 million charge to adjust the deferred gain on the retroactive reinsurance transaction entered into in connection with the sale of businesses in 1998, partially offset by the amortization of deferred gains on retroactive reinsurance and favorable reserve development associated with AFG’s internal reinsurance program. Favorable reserve development in 2016 and 2015 reflects amortization of deferred gains on retroactive reinsurance and reserve development associated with AFG’s internal reinsurance program.

Asbestos and environmental reserve charges   As previously discussed under “Uncertainties” — “Asbestos and Environmental-related (“A&E”) Insurance Reserves,” AFG has established property and casualty reserves for claims related to environmental exposures and asbestos claims. Total charges recorded to increase reserves (net of reinsurance recoverable) for A&E exposures of AFG’s property and casualty group (included in loss and loss adjustment expenses) were $89 million in 2017, $36 million in 2016 and $67 million in 2015.

Neon exited lines charge See “Net prior year reserve development” under “Results of Operations — Property and Casualty Insurance Segment” for the quarters ended December 31, 2017 and 2016 for a discussion of the $57 million in adverse reserve development recorded as part of a $65 million non-core charge related to the exit of certain lines of business within Neon, AFG’s Lloyd’s insurer. Consistent with the treatment of the exited lines charge in 2016, the $18 million in favorable development related to the Neon exited lines recorded in connection with the December 2017 reinsurance to close transaction (discussed above under Specialty casualty) was treated as non-core.

Aggregate Aggregate net prior accident years reserve development for AFG’s property and casualty insurance segment includes the A&E charges, the Neon exited lines charge and the favorable development on the Neon exited lines mentioned above and adverse reserve development of $4 million in 2017 and $3 million in 2015 related to business outside the Specialty group that AFG no longer writes.

Catastrophe losses

AFG generally seeks to reduce its exposure to catastrophes through individual risk selection, including minimizing coastal and known fault-line exposures, and the purchase of reinsurance. AFG recorded net catastrophe losses of $140 million in 2017 primarily from storms and tornadoes in several regions of the United States in the first and second quarters, Hurricanes Harvey, Irma and Maria and earthquakes in Mexico in the third quarter and wildfires in California in the fourth quarter. Catastrophe losses of $55 million in 2016 resulted primarily from winter storms in the first quarter, storms in Texas in the second quarter, flooding in Louisiana and multiple storms in the southern United States in the third quarter and Hurricane Matthew in the fourth quarter. Catastrophe losses of $35 million in 2015 resulted primarily from winter storms in the first quarter, multiple storms in the midwestern and central United States in the second and third quarters and flooding in the midwestern United States in the fourth quarter.

Commissions and Other Underwriting Expenses

AFG’s property and casualty commissions and other underwriting expenses (“U/W Exp”) were $1.38 billion in 2017 compared to $1.33 billion in 2016, an increase of $52 million (4%). AFG’s underwriting expense ratio was 30.2% in 2017 compared to 30.7% in 2016, a decrease of 0.5 percentage points.

AFG’s property and casualty U/W Exp were $1.33 billion in 2016 compared to $1.30 billion in 2015, an increase of $26 million (2%). AFG’s underwriting expense ratio was 30.7% in 2016 compared to 30.9% in 2015, a decrease of 0.2 percentage points.

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Detail of AFG’s property and casualty commissions and other underwriting expenses and underwriting expense ratios is shown below (dollars in millions):

	Year ended December 31,												Change in % of NEP
	2017				2016				2015				2017 - 2016		2016 - 2015
	U/W Exp		% of NEP		U/W Exp		% of NEP		U/W Exp		% of NEP
Property and transportation	$	385	22.5	%	$	382	23.0	%	$	392	24.5	%	(0.5	%)	(1.5	%)
Specialty casualty	672		30.7	%	608		30.3	%	600		29.8	%	0.4	%	0.5	%
Specialty financial	288		50.0	%	295		52.9	%	276		53.4	%	(2.9	%)	(0.5	%)
Other specialty	37		35.8	%	37		36.5	%	36		36.1	%	(0.7	%)	0.4	%
Total Specialty	1,382		30.2	%	1,322		30.6	%	1,304		30.9	%	(0.4	%)	(0.3	%)
Neon exited lines charge	—				8				—
Total Aggregate	$	1,382	30.2	%	$	1,330	30.7	%	$	1,304	30.9	%	(0.5	%)	(0.2	%)

AFG’s overall expense ratio decreased 0.5% in 2017 as compared to 2016 and decreased 0.2% in 2016 compared to 2015.

Property and transportation   Commissions and other underwriting expenses as a percentage of net earned premiums decreased0.5 percentage points in 2017 compared to 2016 reflecting the impact of higher crop premiums on the ratio.

Commissions and other underwriting expenses as a percentage of net earned premiums decreased 1.5 percentage points in 2016 compared to 2015 reflecting an increase in ceding commissions received from reinsurers in the crop business.

Specialty casualty   Commissions and other underwriting expenses as a percentage of net earned premiums increased 0.4 percentage points in 2017 compared to 2016 reflecting the impact of reinstatement premiums on the ratio.

Commissions and other underwriting expenses as a percentage of net earned premiums increased 0.5 percentage points in 2016 compared to 2015 due primarily to the impact of lower premiums at Neon on the ratio, partially offset by the impact of a charge in the second quarter of 2015 to write off certain previously capitalized project costs.

Specialty financial   Commissions and other underwriting expenses as a percentage of net earned premiums decreased2.9 percentage points in 2017 compared to 2016 reflecting lower profitability-based commissions paid to agents in the financial institutions business, including an $8 million commission expense reduction due to hurricane losses.

Commissions and other underwriting expenses as a percentage of net earned premiums decreased 0.5 percentage points in 2016 compared to 2015 reflecting lower profitability-based commissions paid to agents.

AggregateAggregate commissions and other underwriting expenses for AFG’s property and casualty insurance segment includes $8 million of restructuring charges recorded as part of the $65 million non-core charge related to the exit of certain lines of business within Neon, AFG’s Lloyd’s insurer, recorded in the second quarter of 2016. See “Net prior year reserve development” under “Results of Operations — Property and Casualty Insurance Segment” for the quarters ended December 31, 2017 and 2016.

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Property and Casualty Net Investment Income

Net investment income in AFG’s property and casualty insurance operations was $362 million in 2017 compared to $350 million in 2016, an increase of $12 million (3%). Net investment income in AFG’s property and casualty operations was $350 million in 2016 compared to $319 million in 2015, an increase of $31 million (10%). In recent years, yields available in the financial markets on fixed maturity securities have generally declined, placing downward pressure on AFG’s investment portfolio yield. The average invested assets and overall yield earned on investments held by AFG’s property and casualty insurance operations are provided below (dollars in millions):

	Year ended December 31,									2017 - 2016					2016 - 2015
	2017			2016			2015			Change			% Change		Change			% Change
Net investment income	$	362		$	350		$	319		$	12		3	%	$	31		10	%
Average invested assets (at amortized cost)	$	9,948		$	9,550		$	8,956		$	398		4	%	$	594		7	%
Yield (net investment income as a % of average invested assets)	3.64		%	3.66		%	3.56		%	(0.02		%)			0.10		%
Tax equivalent yield (*)	4.10		%	4.16		%	4.13		%	(0.06		%)			0.03		%

(*) Adjusts the yield on equity securities and tax-exempt bonds to the fully taxable equivalent yield.

The increase in average invested assets and net investment income in the property and casualty insurance segment in 2017 compared to 2016 is due primarily to growth in the property and casualty insurance segment. The property and casualty insurance segment’s overall yield on investments was 3.64% in 2017 compared to 3.66% in 2016, a decrease of 0.02 percentage points reflecting the impact of lower yields available in the financial markets and lower income from certain investments that are required to be carried at fair value through earnings, partially offset by higher income from equity in the earnings of limited partnerships and similar investments.

The increase in average invested assets in the property and casualty insurance segment in 2016 as compared to 2015 is due primarily to growth in the segment. The $31 million increase in the property and casualty insurance segment’s net investment income reflects a $13 million increase in income from certain investments that are required to be carried at fair value through earnings, an $11 million increase in equity in the earnings of limited partnerships and similar investments and the increase in average invested assets, partially offset by slightly higher investment expenses and lower yields available in the financial markets. The property and casualty segment’s overall yield on investments (net investment income as a percentage of average invested assets) was 3.66% in 2016 compared to 3.56% in 2015, reflecting the higher income from investments carried at fair value and partnership earnings discussed above, partially offset by the impact of the lower current market yields discussed above.

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Property and Casualty Other Income and Expenses, Net

GAAP other income and expenses, net for AFG’s property and casualty insurance operations was a net expense of $13 million in 2017, a net expense of $9 million in 2016, and net earnings of $32 million in 2015. Core other income and expenses, net for AFG’s property and casualty insurance operations was a net expense of $13 million, $41 million and $34 million in 2017, 2016 and 2015, respectively. The table below details the items included in GAAP and core other income and expenses, net for AFG’s property and casualty insurance operations (in millions):

	Year ended December 31,
	2017			2016			2015
Other income
Income from the sale of real estate (*)	$	16		$	1		$	3
Other	12			18			9
Total other income	28			19			12
Other expenses
Amortization of intangibles	8			8			8
NATL merger/tender offer expenses	—			10			—
Other	33			42			36
Total other expense	41			60			44
Interest expense	—			—			2
Core other income and expenses, net	(13		)	(41		)	(34		)
Pretax non-core gain on sale of hotel and apartment properties	—			32			66
GAAP other income and expenses, net	$	(13	)	$	(9	)	$	32

(*) Excludes pretax non-core gains of $32 million on the sale of an apartment property in 2016 and $51 million on the sale of a hotel and $15 million on the sale of an apartment property in 2015.

Other income for AFG’s property and casualty insurance operations includes $3 million in 2017 and $4 million in 2016 in death benefits from life insurance policies.

AFG and its consolidated subsidiaries incurred $10 million in transaction expenses in 2016 related to GAI’s acquisition of all of the NATL common stock that it did not already own. These expenses consisted primarily of financial advisory and legal services. See Note B — “Acquisitions and Sale of Businesses” to the financial statements.

Interest expense for AFG’s property and casualty insurance operations includes interest charges on long-term debt within the property and casualty operations.

Annuity Segment — Results of Operations

AFG’s annuity operations contributed $380 million in pretax earnings in 2017 compared to $368 million in 2016, an increase of $12 million (3%). AFG’s annuity segment results in 2017 compared to 2016 reflect an 11% increase in average annuity investments (at amortized cost), partially offset by lower investment yields due to the run-off of higher yielding investments and higher general and administrative expenses. Included in these results is the change in fair value of derivatives related to FIAs, which had a negative impact of $33 million in 2017 compared to $27 million in 2016. Both periods reflect the negative impact of lower than anticipated interest rates, partially offset by the positive impact of a higher stock market on the fair value accounting for FIAs. AFG’s periodic detailed review (“unlocking”) of the major actuarial assumptions underlying its annuity operations resulted in a net annuity charge of $3 million in 2017 compared to a net annuity expense reduction of $1 million in 2016.

AFG’s annuity operations contributed $368 million in pretax earnings in 2016 compared to $331 million in 2015, an increase of $37 million (11%). The increase in AFG’s annuity segment results in 2016 compared to 2015 reflects higher investment income from certain investments that are required to be carried at fair value through earnings and a 12% increase in average annuity investments (at amortized cost), partially offset by lower investment yields due to the run-off of higher yielding investments and higher general and administrative expenses. The change in fair value of derivatives related to FIAs had a negative impact of $27 million in 2016 compared to $23 million in 2015. For 2016, the negative impact of a significant drop in interest rates on fair value accounting for FIAs was partially offset by the positive impact of an increase in the stock market. For 2015, fair value accounting for FIAs was negatively impacted by a significant decrease in the stock market and a slightly lower than expected increase in interest rates. Operating earnings also included a net unlocking expense reduction of $1 million in 2016 compared to $10 million in 2015.

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The following table details AFG’s earnings before income taxes from its annuity operations for 2017, 2016 and 2015 (dollars in millions):

	Year ended December 31,						% Change
	2017		2016		2015		2017 - 2016		2016 - 2015
Revenues:
Net investment income	$	1,458	$	1,356	$	1,224	8	%	11	%
Other income:
Guaranteed withdrawal benefit fees	60		53		43		13	%	23	%
Policy charges and other miscellaneous income	43		50		55		(14	%)	(9	%)
Total revenues	1,561		1,459		1,322		7	%	10	%
Costs and Expenses:
Annuity benefits (*)	892		800		732		12	%	9	%
Acquisition expenses	168		181		163		(7	%)	11	%
Other expenses	121		110		96		10	%	15	%
Total costs and expenses	1,181		1,091		991		8	%	10	%
Earnings before income taxes	$	380	$	368	$	331	3	%	11	%

Detail of annuity earnings before income taxes (dollars in millions):

	Year ended December 31,									% Change
	2017			2016			2015			2017 - 2016		2016 - 2015
Earnings before income taxes — before the impact of derivatives related to FIAs	$	413		$	395		$	354		5	%	12	%
Impact of derivatives related to FIAs	(33		)	(27		)	(23		)	22	%	17	%
Earnings before income taxes	$	380		$	368		$	331		3	%	11	%

(*) Annuity benefits consisted of the following (dollars in millions):

	Year ended December 31,									% Change
	2017			2016			2015			2017 - 2016		2016 - 2015
Interest credited — fixed	$	633		$	574		$	532		10	%	8	%
Interest credited — fixed component of variable annuities	5			5			6			—	%	(17	%)
Other annuity benefits:
Change in expected death and annuitization reserve	18			18			19			—	%	(5	%)
Amortization of sales inducements	19			24			26			(21	%)	(8	%)
Change in guaranteed withdrawal benefit reserve	67			69			63			(3	%)	10	%
Change in other benefit reserves	45			34			22			32	%	55	%
Total other annuity benefits	149			145			130			3	%	12	%
Total before impact of derivatives related to FIAs and unlocking	787			724			668			9	%	8	%
Derivatives related to fixed-indexed annuities:
Embedded derivative mark-to-market	564			194			(11		)	191	%	(1,864	%)
Equity option mark-to-market	(494		)	(141		)	56			250	%	(352	%)
Impact of derivatives related to FIAs	70			53			45			32	%	18	%
Unlocking	35			23			19			52	%	21	%
Total annuity benefits	$	892		$	800		$	732		12	%	9	%

See “Annuity Unlocking” below for a discussion of the impact that the periodic review of actuarial assumptions had on annuity benefit expense.

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Net Spread on Fixed Annuities (excludes variable annuity earnings)

The table below (dollars in millions) details the components of the spreads for AFG’s fixed annuity operations (including fixed-indexed annuities):

	Year ended December 31,									% Change
	2017			2016			2015			2017 - 2016		2016 - 2015
Average fixed annuity investments (at amortized cost)	$	31,250		$	28,223		$	25,174		11	%	12	%
Average fixed annuity benefits accumulated	31,526			28,146			24,898			12	%	13	%
As % of fixed annuity benefits accumulated (except as noted):
Net investment income (as % of fixed annuity investments)	4.63		%	4.77		%	4.83		%
Interest credited — fixed	(2.01		%)	(2.04		%)	(2.14		%)
Net interest spread	2.62		%	2.73		%	2.69		%
Policy charges and other miscellaneous income	0.11		%	0.15		%	0.18		%
Other annuity benefit expenses, net of guaranteed withdrawal benefit fees	(0.28		%)	(0.33		%)	(0.35		%)
Acquisition expenses	(0.62		%)	(0.70		%)	(0.74		%)
Other expenses	(0.37		%)	(0.38		%)	(0.36		%)
Change in fair value of derivatives related to fixed-indexed annuities	(0.22		%)	(0.19		%)	(0.18		%)
Unlocking	(0.01		%)	0.01		%	0.02		%
Net spread earned on fixed annuities	1.23		%	1.29		%	1.26		%

The table below illustrates the impact of fair value accounting for derivatives related to fixed-indexed annuities on the annuity segment’s net spread earned on fixed annuities:

	Year ended December 31,
	2017		2016		2015
Net spread earned on fixed annuities — before impact of derivatives related to FIAs	1.33	%	1.39	%	1.35	%
Impact of derivatives related to fixed-indexed annuities:
Change in fair value of derivatives	(0.22	%)	(0.19	%)	(0.18	%)
Related impact on amortization of DPAC (*)	0.12	%	0.09	%	0.08	%
Related impact on amortization of deferred sales inducements (*)	—	%	—	%	0.01	%
Net spread earned on fixed annuities	1.23	%	1.29	%	1.26	%

(*) An estimate of the related acceleration/deceleration of the amortization of deferred policy acquisition costs and deferred sales inducements.

Annuity Net Investment Income

Net investment income in 2017 was $1.46 billion compared to $1.36 billion in 2016, an increase of $102 million (8%). This increase reflects the growth in AFG’s annuity business, partially offset by the impact of lower investment yields. The overall yield earned on investments in AFG’s annuity operations, calculated as net investment income divided by average investment balances (at amortized cost), decreased by 0.14 percentage points to 4.63% from 4.77% in 2017 compared to 2016. This decline in net investment yield reflects (i) the investment of new premium dollars at lower yields as compared to the existing investment portfolio and (ii) the impact of the reinvestment of proceeds from maturity and redemption of higher yielding investments at the lower yields available in the financial markets. During 2017, $4.9 billion in annuity segment investments with an average yield of 5.14% were redeemed or sold while the investments purchased during 2017 (with new premium dollars and the redemption/sale proceeds) had an average yield at purchase of 3.94%.

Net investment income in 2016 was $1.36 billion compared to $1.22 billion in 2015, an increase of $132 million (11%). This increase reflects primarily the growth in AFG’s annuity business and higher income from certain investments that are required to be carried at fair value through earnings, partially offset by the impact of lower in-force investment yields. The overall yield earned on investments in AFG’s annuity operations decreased by 0.06 percentage points to 4.77% from 4.83% in 2016 compared to 2015. This decline in net investment yield reflects (i) the investment of new premium dollars at lower yields as compared to the existing investment portfolio and (ii) the impact of the reinvestment of proceeds from maturity and redemption

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of higher yielding investments at the lower yields available in the financial markets, partially offset by higher investment income from certain investments that are required to be carried at fair value through earnings. During 2016, $4.0 billion in annuity segment investments with an average yield of 5.51% were redeemed or sold while the investments purchased during 2016 (with new premium dollars and the redemption/sale proceeds) had an average yield at purchase of 4.21%.

Annuity Interest Credited — Fixed

Interest credited — fixed in 2017 was $633 million compared to $574 million in 2016, an increase of $59 million (10%). The impact of growth in the annuity business was partially offset by lower interest crediting rates on new premiums as compared to the crediting rates on policyholder funds surrendered or withdrawn. The average interest rate credited to policyholders, calculated as interest credited divided by average fixed annuity benefits accumulated, decreased0.03 percentage points to 2.01% in 2017 from 2.04% in 2016.

Interest credited — fixed in 2016 was $574 million compared to $532 million in 2015, an increase of $42 million (8%). The impact of growth in the annuity business was partially offset by lower interest crediting rates on new premiums as compared to the crediting rates on policyholder funds surrendered or withdrawn. The average interest rate credited to policyholders decreased 0.10 percentage points to 2.04% in 2016 from 2.14% in 2015.

Annuity Net Interest Spread

AFG’s net interest spread decreased0.11 percentage points to 2.62% from 2.73% in 2017 compared to 2016 due primarily to lower fixed maturity investment yields, partially offset by the impact of lower crediting rates. Features included in current annuity offerings allow AFG to achieve its desired profitability at a lower net interest spread than historical product offerings. As a result, AFG expects its net interest spread to narrow in the future.

AFG’s net interest spread increased 0.04 percentage points to 2.73% in 2016 from 2.69% in 2015 as the impact of lower in-force investment yields was more than offset by lower crediting rates and higher income from certain investments that are required to be carried at fair value through earnings.

Annuity Policy Charges and Other Miscellaneous Income

Annuity policy charges and other miscellaneous income, which consist primarily of surrender charges, amortization of deferred upfront policy charges (unearned revenue) and income from sales of real estate, were $43 million in 2017 compared to $50 million in 2016, a decrease of $7 million (14%). Excluding the impact of unlocking charges of $3 million in 2017 and $1 million in 2016 related to unearned revenue, annuity policy charges and other miscellaneous income were $46 million in 2017 compared to $51 million in 2016, a decrease of $5 million (10%). Other miscellaneous income includes $1 million from the sale of real estate in 2017 compared to $5 million in 2016. Excluding the impact of unlocking charges related to unearned revenue, annuity policy charges and other miscellaneous income as a percentage of average fixed annuity benefits accumulated decreased0.04 percentage points to 0.11% in 2017 from 0.15% in 2016.

Annuity policy charges and other miscellaneous income were $50 million in 2016 compared to $55 million in 2015, a decrease of $5 million (9%). Other miscellaneous income includes $5 million in income from the sale of real estate in 2016 compared to $6 million in 2015. Excluding the impact of unlocking charges of $1 million in 2016 and $2 million in 2015 related to unearned revenue, annuity policy charges and other miscellaneous income were $51 million in 2016 compared to $57 million in 2015, a decrease of $6 million (11%). Excluding the impact of unlocking charges related to unearned revenue, annuity policy charges and other miscellaneous income as a percentage of average fixed annuity benefits accumulated decreased 0.03 percentage points to 0.15% in 2016 from 0.18% in 2015.

See “Annuity Unlocking” below for a discussion of the impact that the periodic review of actuarial assumptions had on annuity policy charges and other miscellaneous income.

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Other Annuity Benefits, Net of Guaranteed Withdrawal Benefit Fees

Other annuity benefits, net of guaranteed withdrawal benefit fees (excluding the impact of unlocking) were $89 million in 2017, $92 million in 2016 and $87 million in 2015, representing a decrease of $3 million (3%) in 2017 compared to 2016 and an increase of $5 million (6%) in 2016 compared to 2015. As a percentage of average fixed annuity benefits accumulated, these net expenses decreased 0.05 percentage points to 0.28% in 2017 from 0.33% in 2016 and decreased 0.02 percentage points to 0.33% in 2016 from 0.35% in 2015. In addition to interest credited to policyholders’ accounts and the change in fair value of derivatives related to fixed-indexed annuities, annuity benefits expense also includes the following expenses (in millions, net of guaranteed withdrawal benefit fees):

	Year ended December 31,
	2017			2016			2015
Change in expected death and annuitization reserve	$	18		$	18		$	19
Amortization of sales inducements	19			24			26
Change in guaranteed withdrawal benefit reserve	67			69			63
Change in other benefit reserves	45			34			22
Other annuity benefits	149			145			130
Offset guaranteed withdrawal benefit fees	(60		)	(53		)	(43		)
Other annuity benefits, net	$	89		$	92		$	87

As discussed under “Annuity Benefits Accumulated” in Note A — “Accounting Policies” to the financial statements, guaranteed withdrawal benefit reserves are accrued for and modified using assumptions similar to those used in establishing and amortizing deferred policy acquisition costs. The guaranteed withdrawal benefit reserve related to FIAs is inversely impacted by the calculated FIA embedded derivative reserve as the value to policyholders of the guaranteed withdrawal benefits decreases when the benefit of stock market participation increases.

The $5 million increase in other annuity benefits, net of guaranteed withdrawal benefit fees in 2016 compared to 2015 primarily reflects growth in the business.

See “Annuity Unlocking” below for a discussion of the impact that the periodic review of actuarial assumptions had on annuity benefits expense.

Annuity Acquisition Expenses

Excluding the impact of unlocking charges (expense reductions) discussed under “Annuity Unlocking” below, AFG’s amortization of DPAC and commission expenses as a percentage of average fixed annuity benefits accumulated was 0.62% in 2017 compared to 0.70% in 2016 and 0.74% in 2015 and has generally ranged between 0.75% and 0.85%. Variances from the general range relate primarily to the impact of (i) material changes in interest rates or the stock market on AFG’s fixed-indexed annuity business, and (ii) differences in actual experience from actuarially projected estimates and assumptions. For example, the negative impact of significantly lower than anticipated interest rates during 2017 and 2016, and the significant stock market decrease in 2015 on the fair value of derivatives related to fixed-indexed annuities (discussed below) resulted in a partially offsetting deceleration in the amortization of DPAC.

The table below illustrates the estimated impact of fair value accounting for derivatives related to fixed-indexed annuities on annuity acquisition expenses as a percentage of average fixed annuity benefits accumulated:

	Year ended December 31,
	2017		2016		2015
Before the impact of changes in the fair value of derivatives related to FIAs on the amortization of DPAC	0.74	%	0.79	%	0.82	%
Impact of changes in fair value of derivatives related to FIAs on the amortization of DPAC (*)	(0.12	%)	(0.09	%)	(0.08	%)
Annuity acquisition expenses as a % of fixed annuity benefits accumulated	0.62	%	0.70	%	0.74	%

(*) An estimate of the acceleration/deceleration in the amortization of deferred policy acquisition costs resulting from fair value accounting for derivatives related to fixed-indexed annuities.

See “Annuity Unlocking” below for a discussion of the impact that the periodic review of actuarial assumptions had on annuity and supplemental insurance acquisition expenses. Unanticipated spread compression, decreases in the stock market, adverse mortality experience, and higher than expected lapse rates could lead to write-offs of DPAC or PVFP in the future.

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Annuity Other Expenses

Annuity other expenses were $121 million in 2017, $110 million in 2016 and $96 million in 2015, representing an increase of $11 million (10%) in 2017 compared to 2016 and an increase of $14 million (15%) in 2016 compared to 2015. Annuity other expenses represent primarily general and administrative expenses, as well as selling and issuance expenses that are not deferred. As a percentage of average fixed annuity benefits accumulated, these expenses decreased0.01 percentage points to 0.37% in 2017 from 0.38% in 2016 and increased 0.02 percentage points to 0.38% in 2016 from 0.36% in 2015. The increase in annuity other expenses in 2017 compared to 2016 and 2016 compared to 2015 reflects primarily growth in the business and an increase in the number of sales personnel focused on new initiatives and increased market share within existing financial institutions and retail marketing organizations.

Change in Fair Value of Derivatives Related to Fixed-Indexed Annuities

AFG’s fixed-indexed annuities provide policyholders with a crediting rate tied, in part, to the performance of an existing stock market or other financial index. AFG attempts to mitigate the risk in the index-based component of these products through the purchase of call options on the appropriate index. AFG’s strategy is designed so that the change in the fair value of the call option assets will generally offset the economic change in the liabilities from the index participation. Both the index-based component of the annuities (an embedded derivative) and the related call options are considered derivatives that must be adjusted for changes in fair value through earnings each period. The fair values of these derivatives are impacted by actual and expected stock market performance and interest rates as well as other factors. For a list of other factors impacting the fair value of the index-based component (embedded derivative) of AFG’s annuity benefits accumulated, see Note D — “Fair Value Measurements” to the financial statements. In addition, the change in the fair value of the embedded derivative includes interest accreted on the FIA embedded derivative reserve of $14 million in 2017, $4 million in 2016 and $1 million in 2015 (before the related impact on the amortization of sales inducements and deferred policy acquisition costs).

Excluding the impact of unlocking charges, the net change in fair value of derivatives related to fixed-indexed annuities increased annuity benefits by $70 million in 2017, $53 million in 2016 and $45 million in 2015. The increase in 2017 and 2016 reflects the negative impact of significantly lower than anticipated interest rates on the fair value of these derivatives, partially offset by the positive impact of strong stock market performance in both periods. The increase in 2015 reflects the negative impact of the decline in the stock market and lower than anticipated interest rates on these derivatives. As a percentage of average fixed annuity benefits accumulated, this net expense increased0.03 percentage points to 0.22% in 2017 from 0.19% in 2016, and increased 0.01 percentage points to 0.19% in 2016 from 0.18% in 2015.

Fluctuations in interest rates and the stock market, among other factors, can cause volatility in the periodic measurement of fair value of the embedded derivative that management believes can be inconsistent with the long-term economics of these products. The table below illustrates the impact of fair value accounting for derivatives related to fixed-indexed annuities on the annuity segment’s earnings before income taxes (dollars in millions):

	Year ended December 31,									% Change
	2017			2016			2015			2017 - 2016		2016 - 2015
Earnings before income taxes — before change in fair value of derivatives related to FIAs	$	413		$	395		$	354		5	%	12	%
Change in fair value of derivatives related to FIAs	(70		)	(53		)	(45		)	32	%	18	%
Related impact on amortization of DPAC (*)	37			26			22			42	%	18	%
Earnings before income taxes	$	380		$	368		$	331		3	%	11	%

(*) An estimate of the related acceleration/deceleration of amortization of deferred sales inducements and deferred policy acquisition costs.

As illustrated in the table above, the change in fair value of derivatives related to fixed-indexed annuities, including the related impact on amortization of DPAC decreased the annuity segment’s earnings before income taxes by $33 million, $27 million and $23 million in 2017, 2016 and 2015, respectively.

See “Annuity Unlocking” below for a discussion of the impact that the periodic review of actuarial assumptions had on the change in the fair value of the embedded derivative liability.

Annuity Net Spread Earned on Fixed Annuities

AFG’s net spread earned on fixed annuities decreased0.06 percentage points to 1.23% in 2017 from 1.29% in 2016 due primarily to the 0.11 percentage points decrease in AFG’s net interest spread, partially offset by other small net positive items.

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AFG’s net spread earned on fixed annuities increased 0.03 percentage points to 1.29% in 2016 from 1.26% in 2015 due primarily to the 0.04 percentage points increase in AFG’s net interest spread.

Annuity Benefits Accumulated

Annuity premiums received and benefit payments are recorded as increases or decreases in annuity benefits accumulated rather than as revenue and expense. Increases in this liability for interest credited and other benefits are charged to expense and decreases for surrender and other policy charges are credited to other income.

For certain products, annuity benefits accumulated also includes reserves for accrued persistency and premium bonuses, excess benefits expected to be paid on future deaths and annuitizations (“EDAR”) and guaranteed withdrawal benefits. Annuity benefits accumulated also includes amounts advanced from the Federal Home Loan Bank of Cincinnati. The following table is a progression of AFG’s annuity benefits accumulated liability for 2017, 2016 and 2015 (in millions):

	Year ended December 31,
	2017			2016			2015
Beginning fixed annuity reserves	$	29,647		$	26,371		$	23,462
Fixed annuity premiums (receipts)	4,313			4,398			4,098
Federal Home Loan Bank advances (paydowns)	(64		)	150			345
Surrenders, benefits and other withdrawals	(2,246		)	(2,189		)	(1,932		)
Sale of subsidiaries	—			—			(261		)
Interest and other annuity benefit expenses:
Interest credited	633			574			532
Embedded derivative mark-to-market	564			194			(11		)
Change in other benefit reserves	117			122			115
Unlocking	41			27			23
Ending fixed annuity reserves	$	33,005		$	29,647		$	26,371
Reconciliation to annuity benefits accumulated per balance sheet:
Ending fixed annuity reserves (from above)	$	33,005		$	29,647		$	26,371
Impact of unrealized investment gains	133			76			64
Fixed component of variable annuities	178			184			187
Annuity benefits accumulated per balance sheet	$	33,316		$	29,907		$	26,622

Statutory Annuity Premiums

AFG’s annuity operations generated statutory premiums of $4.34 billion in 2017, $4.44 billion in 2016 and $4.14 billion in 2015, a decrease of $94 million (2%) in 2017 compared to 2016 and an increase of $295 million (7%) in 2016 compared to 2015. The following table summarizes AFG’s annuity sales (dollars in millions):

	Year ended December 31,						% Change
	2017		2016		2015		2017 - 2016		2016 - 2015
Financial institutions single premium annuities — indexed	$	1,711	$	1,950	$	1,741	(12	%)	12	%
Financial institutions single premium annuities — fixed	622		468		229		33	%	104	%
Retail single premium annuities — indexed	1,723		1,714		1,864		1	%	(8	%)
Retail single premium annuities — fixed	83		82		70		1	%	17	%
Education market — fixed and indexed annuities	174		184		194		(5	%)	(5	%)
Total fixed annuity premiums	4,313		4,398		4,098		(2	%)	7	%
Variable annuities	28		37		42		(24	%)	(12	%)
Total annuity premiums	$	4,341	$	4,435	$	4,140	(2	%)	7	%

Management believes the 2% decrease in annuity premiums in 2017 compared to 2016 is the result of AFG’s adherence to pricing discipline in a relatively low and decreasing interest rate environment during the year, as well as from aggressive pricing in certain of AFG’s competitors.

Management attributes the 7% increase in annuity premiums in 2016 compared to 2015 to growth in the annuity industry, and new products, additional staffing, and increased market share within existing financial institutions. This growth slowed in the

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second half of 2016 as a result of AFG’s reduction in crediting rates on its annuities in 2016 due to the decline in market interest rates; these crediting rate reductions were made to maintain appropriate returns on new business.

Annuity Unlocking

In 2017, 2016 and 2015, AFG conducted its detailed review (“unlocking”) of the major actuarial assumptions underlying its annuity operations. As a result of these reviews, AFG recorded a net charge related to its annuity business of $3 million in 2017 and a net expense reduction of $1 million in 2016 and $10 million in 2015, which impacted AFG’s financial statements as follows (in millions):

	Year ended December 31,
	2017			2016			2015
Policy charges and other miscellaneous income:
Unearned revenue	$	(3	)	$	(1	)	$	(2	)
Total revenues	(3		)	(1		)	(2		)
Annuity benefits:
Fixed-indexed annuities embedded derivative	25			17			28
Sales inducements	(6		)	(4		)	(4		)
Other reserves	16			10			(5		)
Total annuity benefits	35			23			19
Annuity and supplemental insurance acquisition expenses:
Deferred policy acquisition costs	(35		)	(25		)	(31		)
Total costs and expenses	—			(2		)	(12		)
Net expense reduction (charge)	$	(3	)	$	1		$	10

See “Annuity Unlocking” under “Annuity Segment — Results of Operations” for the quarters ended December 31, 2017 and 2016 for a discussion of the overall net expense reduction from the periodic review of actuarial assumptions in 2017 and 2016.

Annuity Earnings before Income Taxes Reconciliation

The following table reconciles the net spread earned on AFG’s fixed annuities to overall annuity pretax earnings for 2017, 2016 and 2015 (in millions):

	Year ended December 31,
	2017			2016		2015
Earnings on fixed annuity benefits accumulated	$	387		$	363	$	313
Earnings impact of investments in excess of fixed annuity benefits accumulated (*)	(13		)	4		13
Variable annuity earnings	6			1		5
Earnings before income taxes	$	380		$	368	$	331

(*) Net investment income (as a % of investments) of 4.63%, 4.77% and 4.83% in 2017, 2016 and 2015, respectively, multiplied by the difference between average fixed annuity investments (at amortized cost) and average fixed annuity benefits accumulated in each period.

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Run-off Long-Term Care and Life Segment — Results of OperationsAFG’s run-off long-term care and life segment contributed GAAP pretax earnings of $6 million and $4 million in 2017 and 2016, respectively, compared to a loss of $152 million in 2015. Results for 2015 include a $166 million pretax non-core realized loss on the sale of the subsidiaries containing substantially all of AFG’s run-off long-term care insurance business. See Note B — “Acquisitions and Sale of Businesses” to the financial statements. The following table details AFG’s GAAP and core earnings (loss) before income taxes from its run-off long-term care and life operations in 2017, 2016 and 2015 (dollars in millions):

	Year ended December 31,							% Change
	2017		2016		2015			2017 - 2016		2016 - 2015
Revenues:
Net earned premiums:
Long-term care	$	3	$	3	$	73		—	%	(96	%)
Life operations	19		21		31			(10	%)	(32	%)
Net investment income	20		21		80			(5	%)	(74	%)
Other income	5		4		4			25	%	—	%
Total revenues	47		49		188			(4	%)	(74	%)
Costs and Expenses:
Life, accident and health benefits:
Long-term care	5		5		91			—	%	(95	%)
Life operations	21		28		40			(25	%)	(30	%)
Acquisition expenses	5		5		16			—	%	(69	%)
Other expenses	10		9		27			11	%	(67	%)
Total costs and expenses	41		47		174			(13	%)	(73	%)
Core earnings before income taxes	6		2		14			200	%	(86	%)
Pretax non-core realized gain (loss) on subsidiaries	—		2		(166		)	(100	%)	(101	%)
GAAP earnings (loss) before income taxes	$	6	$	4	$	(152	)	50	%	(103	%)

The $4 million increase in core earnings before income taxes in 2017 compared to 2016 reflects the impact of improved life claims experience.

The decrease in long-term care net earned premiums and benefit expense in 2016 compared to 2015 is due to the sale of subsidiaries containing substantially all of AFG’s run-off long-term care insurance business in December of 2015.

Substantially all of the core earnings before income taxes in AFG’s run-off long-term care and life segment in 2015 represent earnings from AFG’s long-term care business.

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Holding Company, Other and Unallocated — Results of Operations AFG’s net GAAP pretax loss outside of its insurance operations (excluding realized gains and losses) totaled $258 million in 2017 compared to $181 million in 2016, an increase of $77 million (43%). AFG’s net core pretax loss outside of its insurance operations (excluding realized gains and losses) totaled $183 million in 2017 compared to $176 million in 2016, an increase of $7 million (4%).

AFG’s net GAAP pretax loss outside of its insurance operations (excluding realized gains and losses) totaled $181 million in 2016 compared to $176 million in 2015, an increase of $5 million (3%). AFG’s net core pretax loss outside of its insurance operations (excluding realized gains and losses) totaled $176 million in 2016 compared to $160 million in 2015, an increase of $16 million (10%).

The following table details AFG’s GAAP and core loss before income taxes from operations outside of its insurance operations in 2017, 2016 and 2015 (dollars in millions):

	Year ended December 31,									% Change
	2017			2016			2015			2017 - 2016		2016 - 2015
Revenues:
Net investment income	$	14		$	6		$	4		133	%	50	%
Other income — P&C fees	66			60			54			10	%	11	%
Other income	22			23			24			(4	%)	(4	%)
Total revenues	102			89			82			15	%	9	%
Costs and Expenses:
Property and casualty insurance — commissions and other underwriting expenses	25			19			16			32	%	19	%
Interest charges on borrowed money	85			77			73			10	%	5	%
Other expense — expenses associated with P&C fees	41			41			38			—	%	8	%
Other expenses (*)	134			128			115			5	%	11	%
Total costs and expenses	285			265			242			8	%	10	%
Core loss before income taxes, excluding realized gains and losses	(183		)	(176		)	(160		)	4	%	10	%
Pretax non-core special A&E charges	(24		)	(5		)	(12		)	380	%	(58	%)
Pretax non-core loss on retirement of debt	(51		)	—			(4		)	—	%	(100	%)
GAAP loss before income taxes, excluding realized gains and losses	$	(258	)	$	(181	)	$	(176	)	43	%	3	%

(*) Excludes pretax non-core special A&E charges of $24 million, $5 million and $12 million in 2017, 2016 and 2015, respectively, and pretax non-core losses on retirement of debt of $51 million in 2017 and $4 million in 2015.

Holding Company and Other — Net Investment Income

AFG recorded net investment income on investments held outside of its insurance operations of $14 million, $6 million and $4 million in 2017, 2016 and 2015, respectively. The $8 million increase in 2017 as compared to 2016 is due primarily to the impact of strong market performance on a small portfolio of securities that are classified as “trading” and are carried at fair value through net investment income and strong performance of certain fixed maturity investments.

Holding Company and Other — P&C Fees and Related Expenses

Summit, a workers’ compensation insurance subsidiary, collects fees from a small group of unaffiliated insurers for providing underwriting, policy administration and claims services. In addition, certain of AFG’s property and casualty businesses collect fees from customers for ancillary services such as workplace safety programs and premium financing. In 2017, AFG collected $66 million in fees for these services compared to $60 million in 2016 and $54 million in 2015. Management views this fee income, net of the $41 million in 2017, $41 million in 2016 and $38 million in 2015, in expenses incurred to generate such fees, as a reduction in the cost of underwriting its property and casualty insurance policies. Consistent with internal management reporting, these fees and the related expenses are netted and recorded as a reduction of commissions and other underwriting expenses in AFG’s segmented results. These fees are shown in other income and the related expenses are shown in other expenses in AFG’s Statement of Earnings.

Holding Company and Other — Other Income

Other income in the table above includes $18 million, $17 million and $15 million in 2017, 2016 and 2015, respectively in management fees paid to AFG by the AFG-managed CLOs (AFG’s consolidated managed investment entities). The management fees are eliminated in consolidation — see the other income line in the Consolidated MIEs column under “Results

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of Operations — Segmented Statement of Earnings.” Excluding amounts eliminated in consolidation, AFG recorded other income outside of its insurance operations of $4 million in 2017, $6 million in 2016 and $9 million in 2015.

Holding Company and Other — Interest Charges on Borrowed Money

AFG’s holding companies and other operations outside of its insurance operations recorded interest expense of $85 million in 2017 compared to $77 million in 2016, an increase of $8 million (10%). This increase reflects higher average indebtedness during 2017 compared to 2016, partially offset by a lower weighted average interest rate on outstanding debt.

The increase in average indebtedness for 2017 as compared to 2016 reflects the following financing transactions completed by AFG between January 1, 2016 and December 31, 2017:

• Issued $300 million of 3.50% Senior Notes in August 2016

• Issued $350 million of 4.50% Senior Notes in June 2017

• Redeemed $230 million of 6-3/8% Senior Notes in June 2017

• Redeemed $125 million of 5-3/4% Senior Notes in August 2017

• Issued an additional $125 million of 3.50% Senior Notes in November 2017

• Issued an additional $240 million of 4.50% Senior Notes in November 2017

• Redeemed $350 million of 9-7/8% Senior Notes in December 2017

AFG’s holding companies and other operations outside of its insurance operations recorded interest expense of $77 million in 2016 compared to $73 million in 2015, an increase of $4 million (5%). This increase reflects higher average indebtedness during 2016 compared to 2015, partially offset by a lower weighted average interest rate on outstanding debt and the favorable impact of the interest rate swap on the 9-7/8% Senior Notes due June 2019 that was entered into in June 2015.

The increase in average indebtedness for 2016 as compared to 2015 reflects the following financing transactions completed by AFG between January 1, 2015 and December 31, 2016:

• Issued $300 million of 3.50% Senior Notes in August 2016

• Issued $150 million of 6% Subordinated Debentures in November 2015

• Redeemed $132 million of 7% Senior Notes in September 2015

Holding Company and Other — A&E Charges

As a result of the comprehensive external studies and internal review of A&E exposures discussed under “Uncertainties — Asbestos and Environmental-related (“A&E”) Insurance Reserves,” AFG’s holding companies and other operations outside of its insurance operations recorded non-core special charges of $24 million in 2017, $5 million in 2016 and $12 million in 2015 to increase liabilities related to the A&E exposures of AFG’s former railroad and manufacturing operations. The charges in 2017 and 2016 are due to relatively small movements across several sites that primarily reflect changes in the scope and costs of investigation. In addition, AFG has seen a small increase in claims arising from exposure to deleterious substances other than asbestos, which has caused it to increase its estimated future liability. The charge in 2015 related to slightly higher estimated costs at sites where remediation is underway, coupled with higher estimated cleanup costs at a limited number of sites. Total charges recorded to increase liabilities for A&E exposures of AFG’s former railroad and manufacturing operations (included in other expenses) were $31 million in 2017, $20 million in 2016 and $22 million in 2015.

Holding Company and Other — Loss on Retirement of Debt

On December 11, 2017, AFG redeemed its $350 million outstanding principal amount of 9-7/8% Senior Notes due 2019 and recorded a pretax loss on retirement of debt of $40 million, primarily a $38 million make-whole premium. In addition, AFG wrote off unamortized debt issuance costs of $7 million related to the redemption of its $230 million outstanding 6-3/8% Senior Notes due 2042 at par value on June 26, 2017 and $4 million related to the redemption of its $125 million outstanding 5-3/4% Senior Notes due 2042 at par value on August 25, 2017.

AFG wrote off unamortized debt issuance costs of $4 million related to the redemption of its $132 million outstanding 7% Senior Notes due 2050 at par value on September 30, 2015.

Holding Company and Other — Other Expenses

Excluding the non-core special A&E charges and the non-core losses on retirement of debt discussed above, AFG’s holding companies and other operations outside of its insurance operations recorded other expenses of $134 million in 2017 compared to $128 million in 2016, an increase of $6 million (5%). This increase reflects higher holding company expenses related to employee benefit plans that are tied to stock market performance, partially offset by the impact of a $5 million donation to the University of Cincinnati College of Business in 2016. AFG’s holding companies and other operations outside of its insurance operations recorded other expenses of $128 million in 2016 compared to $115 million in 2015, an increase of $13 million (11%). This increase reflects higher holding company expenses related to employee benefit plans that are tied to stock market

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performance, a $5 million donation to the University of Cincinnati College of Business in 2016 and higher expenses related to AFG’s former railroad and manufacturing operations.

Consolidated Realized Gains (Losses) on Securities AFG’s consolidated realized gains (losses) on securities, which are not allocated to segments, were gains of $5 million in 2017 compared to $19 million in 2016, a decrease of $14 million (74%). AFG’s consolidated realized gains (losses) on securities were gains of $19 million in 2016 compared to losses of $19 million in 2015, an increase of $38 million (200%). Realized gains (losses) on securities consisted of the following (in millions):

	Year ended December 31,
	2017			2016			2015
Realized gains (losses) before impairments:
Disposals	$	87		$	151		$	122
Change in the fair value of derivatives	(6		)	(9		)	(11		)
Adjustments to annuity deferred policy acquisition costs and related items	(3		)	(7		)	(5		)
	78			135			106
Impairment charges:
Securities	(88		)	(131		)	(140		)
Adjustments to annuity deferred policy acquisition costs and related items	15			15			15
	(73		)	(116		)	(125		)
Realized gains (losses) on securities	$	5		$	19		$	(19	)

AFG’s impairment charges on securities in 2017 consist of $63 million on equity securities, $21 million on fixed maturities and $4 million on other investments. Approximately $28 million of the impairment charges in 2017 relates to investments in pharmaceutical companies, $24 million relates to investments in various industrial entities, $14 million relates to investments in financial institutions and $12 million relates to investments in media companies.

AFG’s impairment charges on securities in 2016 consist of $93 million on equity securities and $38 million on fixed maturities. Approximately $70 million in impairment charges in 2016 are related to financial institutions, $19 million are on energy related investments and $7 million relates to a pharmaceutical company.

AFG’s impairment charges on securities in 2015 consist of $94 million on equity securities, $43 million on fixed maturities and $3 million on other investments. Approximately $41 million of the charges are on real estate and mortgage related investments, $38 million are on energy related investments and $12 million are on investments in asset managers.

Consolidated Realized Gains (Losses) on Subsidiaries   In 2015, AFG recorded a pretax realized loss of $166 million on the sale of subsidiaries containing substantially all of AFG’s run-off long-term care insurance business. In the second quarter of 2016, AFG received additional proceeds based on the final closing balance sheet and adjusted certain accrued expense estimates associated with the sale, resulting in a $2 million pretax favorable adjustment to the loss recorded in 2015. See Note B — “Acquisitions and Sale of Businesses” to the financial statements. In addition, AFG recorded a $5 million pretax realized gain in 2015 representing an adjustment to the previously recognized loss on a small property and casualty subsidiary sold several years earlier.

Consolidated Income Taxes   AFG’s consolidated provision for income taxes was $247 million in 2017 compared to $119 million in 2016, an increase of $128 million (108%). AFG’s consolidated provision for income taxes was $119 million in 2016 compared to $195 million in 2015, a decrease of $76 million (39%). See NoteL — “Income Taxes” to the financial statements for an analysis of items affecting AFG’s effective tax rate.

Consolidated Noncontrolling Interests   AFG’s consolidated net earnings attributable to noncontrolling interests was $2 million in 2017 compared to $19 million in 2016, a decrease of $17 million (89%). AFG’s consolidated net earnings attributable to noncontrolling interests was $19 million in 2016 compared to $18 million in 2015, an increase of $1 million (6%). The following table details net earnings in consolidated subsidiaries attributable to holders other than AFG (dollars in millions):

	Year ended December 31,						% Change
	2017		2016		2015		2017 - 2016		2016 - 2015
National Interstate	$	—	$	15	$	10	(100	%)	50	%
Other	2		4		8		(50	%)	(50	%)
Earnings attributable to noncontrolling interests	$	2	$	19	$	18	(89	%)	6	%

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Other noncontrolling interests includes $2 million related to the gain on the sale of a hotel property in the first quarter of 2017, $4 million related to the gain on the sale of an apartment property in the second quarter of 2016 and $6 million related to the gain on the sale of a hotel in the second quarter of 2015. All three properties were owned by an 80%-owned subsidiary of GAI.

RECENTLY ADOPTED ACCOUNTING STANDARDS

In the fourth quarter of 2017, AFG adopted Accounting Standards Update (“ASU”) 2017-04, which simplifies the test for goodwill impairment. Under the previous guidance, if the quantitative test for impairment indicated that the carrying value of a reporting unit exceeded its fair value, an entity had to perform procedures to determine the fair value (at the impairment testing date) of its assets and liabilities (including unrecognized assets and liabilities) following the procedure that would be required in determining the fair value of assets acquired and liabilities assumed in a business combination. Under the new guidance, an impairment charge is measured as the excess of the reporting unit’s carrying value over its fair value (up to the full amount of the goodwill). Because the annual impairment testing of AFG’s goodwill in 2017 did not require quantitative testing, the implementation of the new guidance had no impact on AFG’s results of operations or financial position. In addition, AFG does not expect the new guidance to have a material effect on its results of operations or financial position in future periods.

See Note A — “Accounting Policies — Income Taxes” to the financial statements for a discussion of accounting guidance adopted effective December 31, 2017, which allows the reclassification of amounts stranded in accumulated other comprehensive income from accounting for the Tax Cuts and Jobs Act of 2017 to retained earnings.

See Note A — “Accounting Policies — Managed Investment Entities” to the financial statements for a discussion of accounting guidance adopted on January 1, 2016, which impacts the consolidation of collateralized financing entities such as CLOs, as well as limited partnerships and similar investments.

See Note A — “Accounting Policies — Debt Issuance Costs” to the financial statements for a discussion of accounting guidance adopted on January 1, 2016, which impacted the presentation of debt issuance costs.

See Note A — “Accounting Policies — Stock-Based Compensation” to the financial statements for a discussion of accounting guidance adopted in the fourth quarter of 2016 (effective January 1, 2016), which impacted the accounting for share-based payment transactions.

See Note B — “Acquisitions and Sale of Businesses” to the financial statements for a discussion of accounting guidance adopted on January 1, 2015, that impacts the determination of when a component of an entity qualifies for presentation as a discontinued operation.

See Note O — “Insurance — Property and Casualty Insurance Reserves” to the financial statements for a discussion of accounting guidance adopted for annual reporting beginning in 2016, which requires additional disclosures about the liability for unpaid losses and loss adjustment expenses (including accident year information).

ACCOUNTING STANDARDS TO BE ADOPTED

In January 2016, the FASB issued ASU 2016-01, Financial Instruments – Overall: Recognition and Measurement of Financial Assets and Financial Liabilities which, among other things, requires equity investments that are not accounted for under the equity method of accounting to be measured at fair value with changes in fair value recognized in net earnings, clarifies that the need for a valuation allowance on a deferred tax asset related to available for sale securities should be evaluated with other deferred tax assets and modifies disclosure requirements for financial instruments. AFG will be required to adopt the updated guidance effective January 1, 2018 (early adoption is not permitted). Although recording changes in the fair value of investments in equity securities in net earnings will result in more volatility in AFG’s Statement of Earnings, it is not expected to have a material effect on the carrying value of AFG’s investments or on overall shareholders’ equity as AFG’s investments in equity securities are currently carried at fair value through accumulated other comprehensive income. At the date of adoption, the net unrealized gain on equity securities included in AOCI will be reclassified to retained earnings in the Balance Sheet as the cumulative effect of an accounting change.

In February 2016, the FASB issued ASU 2016-02, Leases, which requires entities that lease assets for terms longer than one year to recognize the assets and liabilities for the rights and obligations created by those leases on the balance sheet based on the present value of cash flows. Qualitative and quantitative disclosures of the amount, timing and uncertainty of cash flows arising from leases will also be required. Although the guidance allows for early adoption, AFG expects to adopt the updated guidance effective January 1, 2019 (when it is required). The guidance will require the earliest comparative period presented to

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include the measurement and recognition of existing leases with an adjustment to shareholders’ equity as if the updated guidance had always been applied. Although the guidance will result in higher assets and higher liabilities from the recognition of assets and liabilities related to operating leases, it does not change the manner in which lease expense is recognized in the statement of earnings. Although management is currently evaluating the impact of this guidance, AFG does not expect it to have a material effect on its results of operations or financial position.

In June 2016, the FASB issued ASU 2016-13, Financial Instruments – Credit Losses: Measurement of Credit Losses on Financial Instruments, which provides a new credit loss model for determining credit-related impairments for financial instruments measured at amortized cost (e.g. mortgage loans or reinsurance recoverables) and requires an entity to estimate the credit losses expected over the life of an exposure or pool of exposures. The estimate of expected credit losses considers historical information, current information, as well as reasonable and supportable forecasts, including estimates of prepayments. The expected credit losses, and subsequent increases or decreases in such losses, will be recorded immediately through realized gains (losses) as an allowance that is deducted from the amortized cost basis of the financial asset, with the net carrying value of the financial asset presented on the balance sheet at the amount expected to be collected. The updated guidance also amends the current other-than-temporary impairment model for available for sale debt securities by requiring the recognition of impairments relating to credit losses through an allowance account and limits the amount of credit loss to the difference between a security’s amortized cost basis and its fair value. Subsequent increases or decreases in expected credit losses will be recorded immediately in the income statement through realized gains (losses). AFG will be required to adopt this guidance effective January 1, 2020. AFG cannot estimate the impact that the updated guidance will have on its results of operations, financial position or liquidity until the updated guidance is adopted.

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ITEM 7A

Quantitative and Qualitative Disclosures about Market Risk

Market risk represents the potential economic loss arising from adverse changes in the fair value of financial instruments. AFG’s exposures to market risk relate primarily to its investment portfolio and annuity contracts, which are exposed to interest rate risk and, to a lesser extent, equity price risk. To a much lesser extent, AFG’s long-term debt is also exposed to interest rate risk.

Fixed Maturity Portfolio   In general, the fair value of AFG’s fixed maturity investments is inversely correlated to changes in market interest rates. AFG’s fixed maturity portfolio is comprised of primarily fixed-rate investments with intermediate-term maturities. This practice is designed to allow flexibility in reacting to fluctuations of interest rates. The portfolios of AFG’s insurance operations are managed with an attempt to achieve an adequate risk-adjusted return while maintaining sufficient liquidity to meet policyholder obligations. AFG’s annuity and run-off long-term care and life operations attempt to align the duration of their invested assets to the projected cash flows of policyholder liabilities.

Consistent with the discussion in Item 7 — Management’s Discussion and Analysis — “Investments,” the following table demonstrates the sensitivity of the fair value of AFG’s fixed maturity portfolio to reasonably likely changes in interest rates by illustrating the estimated effect on AFG’s fixed maturity portfolio and accumulated other comprehensive income that an immediate increase of 100 basis points in the interest rate yield curve would have at December 31 (based on the duration of the portfolio, dollars in millions). Effects of increases or decreases from the 100 basis points illustrated would be approximately proportional.

	2017			2016
Fair value of fixed maturity portfolio	$	38,727		$	34,903
Percentage impact on fair value of 100 bps increase in interest rates	(5.0		%)	(5.0		%)
Pretax impact on fair value of fixed maturity portfolio	$	(1,936	)	$	(1,745	)
Offsetting adjustments to deferred policy acquisition costs and other balance sheet amounts	750			700
Estimated pretax impact on accumulated other comprehensive income	(1,186		)	(1,045		)
Deferred income tax (*)	249			366
Estimated after-tax impact on accumulated other comprehensive income	$	(937	)	$	(679	)

(*) Reflects a U.S. corporate tax rate of 21% for the December 31, 2017 illustration and 35% for December 31, 2016.

Municipal bonds represented approximately 18% of AFG’s fixed maturity portfolio at December 31, 2017. AFG’s municipal bond portfolio is high quality, with 99% of the securities rated investment-grade at that date. The portfolio is well diversified across the states of issuance and individual issuers. At December 31, 2017, approximately 77% of the municipal bond portfolio was held in revenue bonds, with the remaining 23% held in general obligation bonds. AFG does not own general obligation bonds issued by Puerto Rico.

Annuity Contracts Substantially all of AFG’s fixed rate annuity contracts permit AFG to change crediting rates (subject to minimum interest rate guarantees as determined by applicable law) enabling management to react to changes in market interest rates. In 2003, AFG began issuing products with guaranteed minimum interest rates (“GMIRs”) of less than 2%; almost all new business since late 2010 has been issued at a 1% GMIR. At December 31, 2017, AFG could reduce the average crediting rate on approximately $25 billion of traditional fixed and fixed-indexed annuities without guaranteed withdrawal benefits by approximately 92 basis points (on a weighted average basis).

As presented in Item 7 — Management’s Discussion and Analysis — “Results of Operations — Annuity Segment — Years ended December 31, 2017, 2016 and 2015 — Net Spread on Fixed Annuities,” the interest credited rate as a percent of fixed annuity benefits accumulated on AFG’s in-force block of fixed annuities was 2.01% for the year ended December 31, 2017. Management estimates that the interest credited rate on this in-force business will range from 2.00% to 2.10% over the next five years. This rate reflects actuarial assumptions as to (i) expected investment spreads, (ii) deaths, (iii) annuitizations, (iv) surrenders and other withdrawals and (v) renewal premiums. Actual experience and changes in actuarial assumptions may result in different effective crediting rates than those above.

Actuarial assumptions used to estimate DPAC and certain annuity liabilities, as well as AFG’s ability to maintain spread, could be impacted if a low interest rate environment continues for an extended period, or if increases in interest rates cause policyholder behavior to differ significantly from current expectations.

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Projected payments (in millions) in each of the subsequent five years and for all years thereafter on AFG’s fixed annuity liabilities at December 31 were as follows.

	First		Second		Third		Fourth		Fifth		Thereafter		Total		Fair Value (*)
2017	$	2,655	$	3,071	$	3,481	$	4,121	$	4,343	$	20,982	$	38,653	$	32,461
2016	2,523		2,856		3,131		3,442		3,747		18,305		34,004		28,932

(*) Fair value of annuity benefits accumulated excluding life contingent annuities in the payout phase (carrying value of $206 million at December 31, 2017 and $204 million at December 31, 2016).

AFG’s fixed-indexed annuities provide policyholders with a crediting rate tied, in part, to the performance of an existing stock market or other financial index. AFG attempts to mitigate the risk in the index-based component of these products through the purchase of call options on the appropriate index. AFG’s strategy is designed so that the change in the fair value of the call option assets will generally offset the economic change in the liabilities from the index participation. Both the index-based component of the annuities and the related call options are considered derivatives that must be adjusted for changes in fair value through earnings each period. See Note D — “Fair Value Measurements” and Note F — “Derivatives” to the financial statements for a discussion of these derivatives.

Long-Term DebtThe following table shows scheduled principal payments on fixed-rate long-term debt of AFG and its subsidiaries and related weighted average interest rates for each of the subsequent five years and for all years thereafter (dollars in millions):

	December 31, 2017					December 31, 2016
	Scheduled Principal Payments		Rate			Scheduled Principal Payments		Rate
2018	$	—	—	%	2017	$	—	—	%
2019	—		—	%	2018	—		—	%
2020	—		—	%	2019	350		9.9	%	(*)
2021	—		—	%	2020	—		—	%
2022	—		—	%	2021	—		—	%
Thereafter	1,318		4.6	%	Thereafter	958		5.3	%
Total	$	1,318	4.6	%	Total	$	1,308	6.5	%
Fair Value	$	1,354			Fair Value	$	1,356

(*) In June 2015, AFG entered into an interest rate swap that effectively converts its 9-7/8% Senior Notes due 2019 to a floating rate of three-month LIBOR plus 8.099% (9.0624% at December 31, 2016). The 9-7/8% Senior Notes appear in the table above at December 31, 2016 (at the contractual 9-7/8% interest rate) because the notes themselves are fixed-rate obligations. The swap was terminated in December 2017 contemporaneously with the redemption of the 9-7/8% Senior Notes.

103

ITEM 8

Financial Statements and Supplementary Data

	Page
Report of Independent Registered Public Accounting Firm	F-1
Consolidated Balance Sheet as of December 31, 2017 and 2016	F-2
Consolidated Statement of Earnings for the years ended December 31, 2017, 2016 and 2015	F-3
Consolidated Statement of Comprehensive Income for the years ended December 31, 2017, 2016 and 2015	F-4
Consolidated Statement of Changes in Equity for the years ended December 31, 2017, 2016 and 2015	F-5
Consolidated Statement of Cash Flows for the years ended December 31, 2017, 2016 and 2015	F-6
Notes to Consolidated Financial Statements	F-7

Selected Quarterly Financial Data has been included in Note N to the Consolidated Financial Statements.

ITEM 9A

Controls and Procedures

AFG’s management, with participation of its Co-Chief Executive Officers and its Chief Financial Officer, has evaluated AFG’s disclosure controls and procedures (as defined in Exchange Act Rule 13a-15) as of the end of the period covered by this report. Based on that evaluation, AFG’s Co-CEOs and CFO concluded that the controls and procedures are effective. There have been no changes in AFG’s internal control over financial reporting during the fourth fiscal quarter of 2017 that materially affected, or are reasonably likely to materially affect, AFG’s internal control over financial reporting.

MANAGEMENT’S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING

AFG’s management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Securities Exchange Act Rules 13a-15(f). Under the supervision and with the participation of management, including AFG’s Co-Chief Executive Officers and Chief Financial Officer, AFG conducted an evaluation of the effectiveness of internal control over financial reporting as of December 31, 2017, based on the criteria set forth in “Internal Control — Integrated Framework” issued in 2013 by the Committee of Sponsoring Organizations of the Treadway Commission.

There are inherent limitations to the effectiveness of any system of internal controls and procedures, including the possibility of human error and the circumvention or overriding of the controls and procedures. Accordingly, even effective internal controls and procedures can only provide reasonable assurance of achieving their control objectives.

Based on AFG’s evaluation, management concluded that internal control over financial reporting was effective as of December 31, 2017. The attestation report of AFG’s independent registered public accounting firm on AFG’s internal control over financial reporting as of December 31, 2017, is set forth on the next page.

104

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

ON INTERNAL CONTROL OVER FINANCIAL REPORTING

To the shareholders and Board of Directors of American Financial Group, Inc. and subsidiaries

Opinion on Internal Control over Financial Reporting

We have audited American Financial Group, Inc. and subsidiaries’ internal control over financial reporting as of December 31, 2017, based on criteria established in Internal Control — Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) (the COSO criteria). In our opinion, American Financial Group, Inc. and subsidiaries (the “Company”) maintained, in all material respects, effective internal control over financial reporting as of December 31, 2017, based on the COSO criteria.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (“PCAOB”), the consolidated balance sheets of the Company as of December 31, 2017 and 2016, and the related consolidated statements of earnings, comprehensive income, changes in equity and cash flows for each of the three years in the period ended December 31, 2017, and the related notes and financial statement schedules listed in the Index at Item 15(a)(2) and our report dated February 23, 2018, expressed an unqualified opinion thereon.

Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Management’s Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects.

Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control over Financial Reporting

A company’s internal control over financial reporting is a process designed 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. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ ERNST & YOUNG LLP

Cincinnati, Ohio

February 23, 2018

105

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the shareholders and Board of Directors of American Financial Group, Inc. and subsidiaries

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of American Financial Group, Inc. and subsidiaries (the “Company”) as of December 31, 2017 and 2016, the related consolidated statements of earnings, comprehensive income, changes in equity and cash flows for each of the three years in the period ended December 31, 2017, and the related notes and financial statement schedules listed in the Index at Item 15(a)(2) (collectively referred to as the “financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2017 and 2016, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2017, in conformity with U.S. generally accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (“PCAOB”), the Company’s internal control over financial reporting as of December 31, 2017, based on criteria established in Internal Control — Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) and our report dated February 23, 2018 expressed an unqualified opinion thereon.

Basis for Opinion

These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures include examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ ERNST & YOUNG LLP

We have served as the Company’s auditor since 1961.

Cincinnati, Ohio

February 23, 2018

F-1

AMERICAN FINANCIAL GROUP, INC. AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEET

(Dollars in Millions)

	December 31,
	2017		2016
Assets:
Cash and cash equivalents	$	2,338	$	2,107
Investments:
Fixed maturities, available for sale at fair value (amortized cost — $37,038 and $33,735)	38,379		34,544
Fixed maturities, trading at fair value	348		359
Equity securities, available for sale at fair value (cost — $1,321 and $1,351)	1,600		1,502
Equity securities, trading at fair value	62		56
Mortgage loans	1,125		1,147
Policy loans	184		192
Equity index call options	701		492
Real estate and other investments	1,311		1,034
Total cash and investments	46,048		41,433
Recoverables from reinsurers	3,369		2,737
Prepaid reinsurance premiums	600		539
Agents’ balances and premiums receivable	1,146		997
Deferred policy acquisition costs	1,216		1,239
Assets of managed investment entities	4,902		4,765
Other receivables	1,030		908
Variable annuity assets (separate accounts)	644		600
Other assets	1,504		1,655
Goodwill	199		199
Total assets	$	60,658	$	55,072
Liabilities and Equity:
Unpaid losses and loss adjustment expenses	$	9,678	$	8,563
Unearned premiums	2,410		2,171
Annuity benefits accumulated	33,316		29,907
Life, accident and health reserves	658		691
Payable to reinsurers	743		634
Liabilities of managed investment entities	4,687		4,549
Long-term debt	1,301		1,283
Variable annuity liabilities (separate accounts)	644		600
Other liabilities	1,887		1,755
Total liabilities	55,324		50,153
Redeemable noncontrolling interests	3		—
Shareholders’ equity:
Common Stock, no par value — 200,000,000 shares authorized — 88,275,460 and 86,924,399 shares outstanding	88		87
Capital surplus	1,181		1,111
Retained earnings	3,248		3,343
Accumulated other comprehensive income, net of tax	813		375
Total shareholders’ equity	5,330		4,916
Noncontrolling interests	1		3
Total equity	5,331		4,919
Total liabilities and equity	$	60,658	$	55,072

See notes to consolidated financial statements.

F-2

AMERICAN FINANCIAL GROUP, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENT OF EARNINGS

(In Millions, Except Per Share Data)

	Year ended December 31,
	2017			2016			2015
Revenues:
Property and casualty insurance net earned premiums	$	4,579		$	4,328		$	4,224
Life, accident and health net earned premiums	22			24			104
Net investment income	1,831			1,696			1,633
Realized gains (losses) on:
Securities (*)	5			19			(19		)
Subsidiaries	—			2			(161		)
Income (loss) of managed investment entities:
Investment income	210			190			155
Gain (loss) on change in fair value of assets/liabilities	12			15			(34		)
Other income	206			224			243
Total revenues	6,865			6,498			6,145
Costs and Expenses:
Property and casualty insurance:
Losses and loss adjustment expenses	2,955			2,762			2,695
Commissions and other underwriting expenses	1,407			1,349			1,320
Annuity benefits	892			800			732
Life, accident and health benefits	26			33			131
Annuity and supplemental insurance acquisition expenses	173			186			179
Interest charges on borrowed money	85			77			75
Expenses of managed investment entities	181			151			112
Other expenses	422			353			336
Total costs and expenses	6,141			5,711			5,580
Earnings before income taxes	724			787			565
Provision for income taxes	247			119			195
Net earnings, including noncontrolling interests	477			668			370
Less: Net earnings attributable to noncontrolling interests	2			19			18
Net Earnings Attributable to Shareholders	$	475		$	649		$	352
Earnings Attributable to Shareholders per Common Share:
Basic	$	5.40		$	7.47		$	4.02
Diluted	$	5.28		$	7.33		$	3.94
Average number of Common Shares:
Basic	87.8			86.9			87.6
Diluted	89.8			88.5			89.4
Cash dividends per Common Share	$	4.7875		$	2.1525		$	2.03
________________________________________
(*) Consists of the following:
Realized gains before impairments	$	78		$	135		$	106
Losses on securities with impairment	(74		)	(115		)	(125		)
Non-credit portion recognized in other comprehensive income (loss)	1			(1		)	—
Impairment charges recognized in earnings	(73		)	(116		)	(125		)
Total realized gains (losses) on securities	$	5		$	19		$	(19	)

See notes to consolidated financial statements.

F-3

AMERICAN FINANCIAL GROUP, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME

(In Millions)

	Year ended December 31,
	2017			2016			2015
Net earnings, including noncontrolling interests	$	477		$	668		$	370
Other comprehensive income (loss), net of tax:
Net unrealized gains (losses) on securities:
Unrealized holding gains (losses) on securities arising during the period	297			80			(406		)
Reclassification adjustment for realized (gains) losses included in net earnings	(10		)	(12		)	9
Reclassification for unrealized gains of subsidiaries sold	—			—			(22		)
Total net unrealized gains (losses) on securities	287			68			(419		)
Net unrealized gains (losses) on cash flow hedges	(4		)	(8		)	1
Foreign currency translation adjustments	12			7			(14		)
Pension and other postretirement plans adjustments	1			—			1
Other comprehensive income (loss), net of tax	296			67			(431		)
Total comprehensive income (loss), net of tax	773			735			(61		)
Less: Comprehensive income attributable to noncontrolling interests	2			24			10
Comprehensive income (loss) attributable to shareholders	$	771		$	711		$	(71	)

See notes to consolidated financial statements.

F-4

AMERICAN FINANCIAL GROUP, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENT OF CHANGES IN EQUITY

(Dollars in Millions)

			Shareholders’ Equity																		Redeemable
	Common		Common Stock and Capital			Retained			Accumulated Other Comp.						Noncon- trolling			Total			Noncon- trolling
	Shares		Surplus			Earnings			Inc. (Loss)			Total			Interests			Equity			Interests
Balance at December 31, 2014	87,708,793		$	1,240		$	2,912		$	727		$	4,879		$	175		$	5,054		$	—
Cumulative effect of accounting change	—		—			2			—			2			—			2			—
Net earnings	—		—			352			—			352			18			370			—
Other comprehensive loss	—		—			—			(423		)	(423		)	(8		)	(431		)	—
Dividends on Common Stock	—		—			(178		)	—			(178		)	—			(178		)	—
Shares issued:
Exercise of stock options	1,475,202		47			—			—			47			—			47			—
Restricted stock awards	171,130		—			—			—			—			—			—			—
Other benefit plans	111,681		7			—			—			7			—			7			—
Dividend reinvestment plan	26,167		2			—			—			2			—			2			—
Stock-based compensation:
Expense	—		21			—			—			21			—			21			—
Excess tax benefits	—		12			—			—			12			—			12			—
Shares acquired and retired	(1,955,186	)	(27		)	(99		)	—			(126		)	—			(126		)	—
Shares exchanged — benefit plans	(45,765	)	(1		)	(2		)	—			(3		)	—			(3		)	—
Forfeitures of restricted stock	(17,570	)	—			—			—			—			—			—			—
Other	—		—			—			—			—			(7		)	(7		)	—
Balance at December 31, 2015	87,474,452		$	1,301		$	2,987		$	304		$	4,592		$	178		$	4,770		$	—
Net earnings	—		—			649			—			649			19			668			—
Other comprehensive income	—		—			—			62			62			5			67			—
Dividends on Common Stock	—		—			(187		)	—			(187		)	—			(187		)	—
Shares issued:
Exercise of stock options	958,344		32			—			—			32			—			32			—
Restricted stock awards	318,940		—			—			—			—			—			—			—
Other benefit plans	95,875		7			—			—			7			—			7			—
Dividend reinvestment plan	25,516		2			—			—			2			—			2			—
Stock-based compensation expense	—		22			—			—			22			—			22			—
Shares acquired and retired	(1,911,976	)	(29		)	(104		)	—			(133		)	—			(133		)	—
Shares exchanged — benefit plans	(32,707	)	—			(2		)	—			(2		)	—			(2		)	—
Forfeitures of restricted stock	(4,045	)	—			—			—			—			—			—			—
Acquisition of noncontrolling interests	—		(137		)	—			9			(128		)	(187		)	(315		)	—
Other	—		—			—			—			—			(12		)	(12		)	—
Balance at December 31, 2016	86,924,399		$	1,198		$	3,343		$	375		$	4,916		$	3		$	4,919		$	—
Net earnings	—		—			475			—			475			2			477			—
Other comprehensive income	—		—			—			296			296			—			296			—
Impact of the U.S. corporate tax rate change on AOCI	—		—			(145		)	145			—			—			—			—
Dividends on Common Stock	—		—			(421		)	—			(421		)	—			(421		)	—
Shares issued:
Exercise of stock options	1,020,986		34			—			—			34			—			34			—
Restricted stock awards	232,250		—			—			—			—			—			—			—
Other benefit plans	99,588		10			—			—			10			—			10			—
Dividend reinvestment plan	42,572		4			—			—			4			—			4			—
Stock-based compensation expense	—		24			—			—			24			—			24			—
Shares exchanged — benefit plans	(37,718	)	(1		)	(4		)	—			(5		)	—			(5		)	—
Forfeitures of restricted stock	(6,617	)	—			—			—			—			—			—			—
Sale of redeemable noncontrolling interests	—		—			—			(3		)	(3		)	—			(3		)	3
Other	—		—			—			—			—			(4		)	(4		)	—
Balance at December 31, 2017	88,275,460		$	1,269		$	3,248		$	813		$	5,330		$	1		$	5,331		$	3

See notes to consolidated financial statements.

F-5

AMERICAN FINANCIAL GROUP, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENT OF CASH FLOWS

(In Millions)

	Year ended December 31,
	2017			2016			2015
Operating Activities:
Net earnings, including noncontrolling interests	$	477		$	668		$	370
Adjustments:
Depreciation and amortization	107			134			134
Annuity benefits	892			800			732
Realized (gains) losses on investing activities	(23		)	(61		)	100
Net sales of trading securities	17			79			10
Deferred annuity and life policy acquisition costs	(225		)	(230		)	(224		)
Change in:
Reinsurance and other receivables	(963		)	(315		)	(10		)
Other assets	13			(467		)	(13		)
Insurance claims and reserves	1,321			533			451
Payable to reinsurers	109			43			(54		)
Other liabilities	(18		)	265			12
Managed investment entities’ assets/liabilities	60			(279		)	(190		)
Other operating activities, net	37			(20		)	35
Net cash provided by operating activities	1,804			1,150			1,353
Investing Activities:
Purchases of:
Fixed maturities	(9,485		)	(7,537		)	(7,201		)
Equity securities	(182		)	(207		)	(570		)
Mortgage loans	(254		)	(341		)	(213		)
Equity index call options and other investments	(831		)	(738		)	(534		)
Real estate, property and equipment	(109		)	(49		)	(102		)
Proceeds from:
Maturities and redemptions of fixed maturities	6,105			4,713			3,333
Repayments of mortgage loans	215			262			265
Sales of fixed maturities	392			641			321
Sales of equity securities	216			348			364
Sales and settlements of equity index call options and other investments	789			319			374
Sales of real estate, property and equipment	55			55			117
Sales of businesses	—			—			7
Cash and cash equivalents of businesses sold	—			—			(49		)
Managed investment entities:
Purchases of investments	(2,979		)	(2,254		)	(1,530		)
Proceeds from sales and redemptions of investments	2,774			1,890			855
Other investing activities, net	2			(83		)	(10		)
Net cash used in investing activities	(3,292		)	(2,981		)	(4,573		)
Financing Activities:
Annuity receipts	4,341			4,585			4,485
Annuity surrenders, benefits and withdrawals	(2,405		)	(2,275		)	(2,025		)
Net transfers from variable annuity assets	54			42			43
Additional long-term borrowings	712			302			145
Reductions of long-term debt	(745		)	(18		)	(192		)
Issuances of managed investment entities’ liabilities	2,731			2,293			1,026
Retirements of managed investment entities’ liabilities	(2,585		)	(1,600		)	(136		)
Issuances of Common Stock	37			35			61
Repurchases of Common Stock	—			(133		)	(126		)
Cash dividends paid on Common Stock	(417		)	(185		)	(176		)
Acquisition of noncontrolling interests in subsidiary	—			(315		)	—
Other financing activities, net	(4		)	(13		)	(8		)
Net cash provided by financing activities	1,719			2,718			3,097
Net Change in Cash and Cash Equivalents	231			887			(123		)
Cash and cash equivalents at beginning of year	2,107			1,220			1,343
Cash and cash equivalents at end of year	$	2,338		$	2,107		$	1,220

See notes to consolidated financial statements.

F-6

AMERICAN FINANCIAL GROUP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

INDEX TO NOTES
A.	Accounting Policies	I.	Goodwill and Other Intangibles
B.	Acquisitions and Sale of Businesses	J.	Long-Term Debt
C.	Segments of Operations	K.	Shareholders’ Equity
D.	Fair Value Measurements	L.	Income Taxes
E.	Investments	M.	Contingencies
F.	Derivatives	N.	Quarterly Operating Results (Unaudited)
G.	Deferred Policy Acquisition Costs	O.	Insurance
H.	Managed Investment Entities	P.	Additional Information

A.     Accounting Policies

Basis of Presentation   The consolidated financial statements include the accounts of American Financial Group, Inc. and its subsidiaries (“AFG”). Certain reclassifications have been made to prior years to conform to the current year’s presentation. All significant intercompany balances and transactions have been eliminated. The results of operations of companies since their formation or acquisition are included in the consolidated financial statements. Events or transactions occurring subsequent to December 31, 2017, and prior to the filing of this Form 10-K, have been evaluated for potential recognition or disclosure herein.

The preparation of the financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”) requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Changes in circumstances could cause actual results to differ materially from those estimates.

Fair Value Measurements   Accounting standards define fair value as the price that would be received to sell an asset or paid to transfer a liability (an exit price) in an orderly transaction between market participants on the measurement date. The standards establish a hierarchy of valuation techniques based on whether the assumptions that market participants would use in pricing the asset or liability (“inputs”) are observable or unobservable. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect AFG’s assumptions about the assumptions market participants would use in pricing the asset or liability. AFG did not have any significant nonrecurring fair value measurements of nonfinancial assets and liabilities in 2017 or 2016.

Investments Fixed maturity and equity securities classified as “available for sale” are reported at fair value with unrealized gains and losses included in accumulated other comprehensive income (“AOCI”) in AFG’s Balance Sheet. Fixed maturity and equity securities classified as “trading” are reported at fair value with changes in unrealized holding gains or losses during the period included in net investment income. Mortgage and policy loans are carried primarily at the aggregate unpaid balance.

In January 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-01, which, among other things, will require all equity securities currently classified as “available for sale” to be reported at fair value, with holding gains and losses recognized in net earnings, instead of AOCI. AFG will be required to adopt this guidance effective January 1, 2018. At the date of adoption, the $221 million net unrealized gain on equity securities included in AOCI as of December 31, 2017 will be reclassified to retained earnings as the cumulative effect of an accounting change.

Premiums and discounts on fixed maturity securities are amortized using the effective interest method. Mortgage-backed securities (“MBS”) are amortized over a period based on estimated future principal payments, including prepayments. Prepayment assumptions are reviewed periodically and adjusted to reflect actual prepayments and changes in expectations.

Gains or losses on securities are determined on the specific identification basis. When a decline in the value of a specific investment is considered to be other-than-temporary at the balance sheet date, a provision for impairment is charged to earnings (included in realized gains (losses) on securities) and the cost basis of that investment is reduced. If management can assert that it does not intend to sell an impaired fixed maturity security and it is not more likely than not that it will have to sell the security before recovery of its amortized cost basis, then the other-than-temporary impairment is separated into two components: (i) the amount related to credit losses (recorded in earnings) and (ii) the amount related to all other factors (recorded in other comprehensive income). The credit-related portion of an other-than-temporary impairment is measured by comparing a

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security’s amortized cost to the present value of its current expected cash flows discounted at its effective yield prior to the impairment charge. Both components are shown in the statement of earnings. If management intends to sell an impaired security, or it is more likely than not that it will be required to sell the security before recovery, an impairment charge to earnings is recorded to reduce the amortized cost of that security to fair value.

Derivatives Derivatives included in AFG’s Balance Sheet are recorded at fair value. Changes in fair value of derivatives are included in earnings, unless the derivatives are designated and qualify as highly effective cash flow hedges. Derivatives that do not qualify for hedge accounting under GAAP consist primarily of (i) components of certain fixed maturity securities (primarily interest-only MBS) and (ii) the equity-based component of certain annuity products (included in annuity benefits accumulated) and related equity index call options designed to be consistent with the characteristics of the liabilities and used to mitigate the risk embedded in those annuity products.

To qualify for hedge accounting, at the inception of a derivative contract, AFG formally documents the relationship between the terms of the hedge and the hedged items and its risk management objective. This documentation includes defining how hedge effectiveness and ineffectiveness will be measured on a retrospective and prospective basis.

Changes in the fair value of derivatives that are designated and qualify as highly effective cash flow hedges are recorded in AOCI and are reclassified into earnings when the variability of the cash flows from the hedged items impacts earnings. Any hedge ineffectiveness is immediately recorded in current period earnings. When the change in the fair value of a qualifying cash flow hedge is included in earnings, it is included in the same line item in the statement of earnings as the cash flows from the hedged item. AFG uses interest rate swaps that are designated and qualify as highly effective cash flow hedges to mitigate interest rate risk related to certain floating-rate securities included in AFG’s portfolio of fixed maturity securities.

For derivatives that are designated and qualify as highly effective fair value hedges, changes in the fair value of the derivative, along with changes in the fair value of the hedged item attributable to the hedged risk, are recognized in current period earnings.

Goodwill Goodwill represents the excess of cost of subsidiaries over AFG’s equity in their underlying net assets. Goodwill is not amortized, but is subject to an impairment test at least annually. An entity is not required to complete the quantitative annual goodwill impairment test on a reporting unit if the entity elects to perform a qualitative analysis and determines that it is more likely than not that the reporting unit’s fair value exceeds its carrying amount.

Reinsurance Amounts recoverable from reinsurers are estimated in a manner consistent with the claim liability associated with the reinsured policies. AFG’s property and casualty insurance subsidiaries report as assets (i) the estimated reinsurance recoverable on paid and unpaid losses, including an estimate for losses incurred but not reported, and (ii) amounts paid or due to reinsurers applicable to the unexpired terms of policies in force. Payable to reinsurers includes ceded premiums due to reinsurers, as well as ceded premiums retained by AFG’s property and casualty insurance subsidiaries under contracts to fund ceded losses as they become due. AFG’s insurance subsidiaries also assume reinsurance from other companies. Earnings on reinsurance assumed is recognized based on information received from ceding companies.

An AFG subsidiary cedes life insurance policies to a third party on a funds withheld basis whereby the subsidiary retains the assets (securities) associated with the reinsurance contract. Interest is credited to the reinsurer based on the actual investment performance of the retained assets. This reinsurance contract is considered to contain an embedded derivative (that must be adjusted to fair value) because the yield on the payable is based on a specific block of the ceding company’s assets, rather than the overall creditworthiness of the ceding company. AFG determined that changes in the fair value of the underlying portfolio of fixed maturity securities is an appropriate measure of the value of the embedded derivative. The securities related to this contract are classified as “trading.” The adjustment to fair value on the embedded derivative offsets the investment income recorded on the adjustment to fair value of the related trading portfolio.

Deferred Policy Acquisition Costs (“DPAC”)   Policy acquisition costs (principally commissions, premium taxes and certain underwriting and policy issuance costs) directly related to the successful acquisition or renewal of an insurance contract are deferred. DPAC also includes capitalized costs associated with sales inducements offered to fixed annuity policyholders such as enhanced interest rates and premium and persistency bonuses.

For the property and casualty companies, DPAC is limited based upon recoverability without any consideration for anticipated investment income and is charged against income ratably over the terms of the related policies. A premium deficiency is recognized if the sum of expected claims costs, claims adjustment expenses and unamortized acquisition costs exceed the

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related unearned premiums. A premium deficiency is first recognized by charging any unamortized acquisition costs to expense to the extent required to eliminate the deficiency. If the premium deficiency is greater than unamortized acquisition costs, a liability is accrued for the excess deficiency and reported with unpaid losses and loss adjustment expenses.

DPAC related to annuities is deferred to the extent deemed recoverable and amortized, with interest, in relation to the present value of actual and expected gross profits on the policies. Expected gross profits consist principally of estimated future investment margin (estimated future net investment income less interest credited on policyholder funds) and surrender, mortality, and other life and annuity policy charges, less death, annuitization and guaranteed withdrawal benefits in excess of account balances and estimated future policy administration expenses. To the extent that realized gains and losses result in adjustments to the amortization of DPAC related to annuities, such adjustments are reflected as components of realized gains (losses) on securities.

DPAC related to traditional life and health insurance is amortized over the expected premium paying period of the related policies, in proportion to the ratio of annual premium revenues to total anticipated premium revenues. See “Life, Accident and Health Reserves” below for details on the impact of loss recognition on the accounting for traditional life and health insurance contracts.

DPAC includes the present value of future profits on business in force of annuity and life, accident and health insurance companies acquired (“PVFP”). PVFP represents the portion of the costs to acquire companies that is allocated to the value of the right to receive future cash flows from insurance contracts existing at the date of acquisition. PVFP is amortized with interest in relation to expected gross profits of the acquired policies for annuities and universal life products and in relation to the premium paying period for traditional life and health insurance products.

DPAC and certain other balance sheet amounts related to annuity, long-term care and life businesses are also adjusted, net of tax, for the change in expense that would have been recorded if the unrealized gains (losses) from securities had actually been realized. These adjustments are included in unrealized gains (losses) on marketable securities, a component of AOCI in AFG’s Balance Sheet.

Managed Investment EntitiesA company is considered the primary beneficiary of, and therefore must consolidate, a variable interest entity (“VIE”) based primarily on its ability to direct the activities of the VIE that most significantly impact that entity’s economic performance and the obligation to absorb losses of, or receive benefits from, the entity that could potentially be significant to the VIE.

AFG manages, and has investments in, collateralized loan obligations (“CLOs”) that are VIEs (see Note H — “Managed Investment Entities”). AFG has determined that it is the primary beneficiary of the CLOs because (i) its role as asset manager gives it the power to direct the activities that most significantly impact the economic performance of the CLOs and (ii) through its investment in the CLO debt tranches, it has exposure to CLO losses (limited to the amount AFG invested) and the right to receive CLO benefits that could potentially be significant to the CLOs.

On January 1, 2016, AFG adopted ASU 2015-02, which amended certain consolidation accounting guidance, including the VIE guidance that applies to collateralized financing entities such as CLOs. The new guidance affects how fee arrangements with CLO asset managers impact the determination of the primary beneficiary of those entities. Due to the significance of AFG’s investments in the CLOs that it manages, the new guidance did not impact the consolidation of AFG’s currently outstanding CLOs. The new guidance also impacted the consolidation analysis that applies to limited partnerships and similar entities, but did not result in a change to the accounting for AFG’s existing investments in those entities.

Because AFG has no right to use the CLO assets and no obligation to pay the CLO liabilities, the assets and liabilities of the CLOs are shown separately in AFG’s Balance Sheet. AFG has elected the fair value option for reporting on the CLO assets and liabilities to improve the transparency of financial reporting related to the CLOs. The net gain or loss from accounting for the CLO assets and liabilities at fair value is presented separately in AFG’s Statement of Earnings.

The fair values of a CLO’s assets may differ from the separately measured fair values of its liabilities even though the CLO liabilities only have recourse to the CLO assets. AFG has set the carrying value of the CLO liabilities equal to the fair value of the CLO assets (which have more observable fair values) as an alternative to reporting those liabilities at a separately measured fair value. CLO earnings attributable to AFG’s shareholders are measured by the change in the fair value of AFG’s investments in the CLOs and management fees earned.

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Prior to the adoption of new guidance effective January 1, 2015, measuring both the CLO assets and CLO liabilities at separately determined fair values resulted in a difference between the carrying value of the CLO assets and the carrying value of the CLO liabilities that was not attributable to AFG’s ownership interest in the CLOs. This difference was recorded as “appropriated retained earnings — managed investment entities” in AFG’s Balance Sheet. In accordance with the guidance adopted in 2015, the amount reported as “appropriated retained earnings — managed investment entities” at December 31, 2014 was reclassified to “liabilities of managed investment entities” on January 1, 2015 as the cumulative effect of an accounting change.

Unpaid Losses and Loss Adjustment Expenses   The net liabilities stated for unpaid claims and for expenses of investigation and adjustment of unpaid claims represent management’s best estimate and are based upon (i) the accumulation of case estimates for losses reported prior to the close of the accounting period on direct business written; (ii) estimates received from ceding reinsurers and insurance pools and associations; (iii) estimates of unreported losses (including possible development on known claims) based on past experience; (iv) estimates based on experience of expenses for investigating and adjusting claims; and (v) the current state of the law and coverage litigation. Establishing reserves for asbestos, environmental and other mass tort claims involves considerably more judgment than other types of claims due to, among other things, inconsistent court decisions, an increase in bankruptcy filings as a result of asbestos-related liabilities, novel theories of coverage, and judicial interpretations that often expand theories of recovery and broaden the scope of coverage.

Loss reserve liabilities are subject to the impact of changes in claim amounts and frequency and other factors. Changes in estimates of the liabilities for losses and loss adjustment expenses are reflected in the statement of earnings in the period in which determined. Despite the variability inherent in such estimates, management believes that the liabilities for unpaid losses and loss adjustment expenses are adequate.

Annuity Benefits Accumulated   Annuity receipts and benefit payments are recorded as increases or decreases in annuity benefits accumulated rather than as revenue and expense. Increases in this liability for interest credited are charged to expense and decreases for policy charges are credited to other income.

For certain products, annuity benefits accumulated also includes reserves for accrued persistency and premium bonuses, guaranteed withdrawals and excess benefits expected to be paid on future deaths and annuitizations (“EDAR”). The liabilities for EDAR and guaranteed withdrawals are accrued for and modified using assumptions consistent with those used in determining DPAC and DPAC amortization, except that amounts are determined in relation to the present value of total expected assessments. Total expected assessments consist principally of estimated future investment margin, surrender, mortality, and other life and annuity policy charges, and unearned revenues once they are recognized as income.

Annuity benefits accumulated also includes amounts advanced from the Federal Home Loan Bank of Cincinnati.

Unearned Revenue   Certain upfront policy charges on annuities are deferred as unearned revenue (included in other liabilities) and recognized in net earnings (included in other income) using the same assumptions and estimated gross profits used to amortize DPAC.

Life, Accident and Health Reserves Liabilities for future policy benefits under traditional life, accident and health policies are computed using the net level premium method. Computations are based on the original projections of investment yields, mortality, morbidity and surrenders and include provisions for unfavorable deviations unless a loss recognition event (premium deficiency) occurs. Claim reserves and liabilities established for accident and health claims are modified as necessary to reflect actual experience and developing trends.

For long-duration contracts (such as traditional life and long-term care policies), loss recognition occurs when, based on current expectations as of the measurement date, existing contract liabilities plus the present value of future premiums (including reasonably expected rate increases) are not expected to cover the present value of future claims payments and related settlement and maintenance costs (excluding overhead) as well as unamortized acquisition costs. If a block of business is determined to be in loss recognition, a charge is recorded in earnings in an amount equal to the excess of the present value of expected future claims costs and unamortized acquisition costs over existing reserves plus the present value of expected future premiums (with no provision for adverse deviation). The charge is recorded first to reduce unamortized acquisition costs and then as an additional reserve (if unamortized acquisition costs have been reduced to zero).

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In addition, reserves for traditional life and long-term care policies are subject to adjustment for loss recognition charges that would have been recorded if the unrealized gains (losses) from securities had actually been realized. This adjustment is included in unrealized gains (losses) on marketable securities, a component of AOCI in AFG’s Balance Sheet.

Debt Issuance CostsDebt issuance costs related to AFG’s outstanding debt are amortized over the life of the related debt using the effective interest method. Effective January 1, 2016, AFG adopted (on a retrospective basis) ASU 2015-03, which requires debt issuance costs to be presented in the balance sheet as a direct reduction in the carrying value of long-term debt (consistent with the treatment of debt discounts) with the periodic amortization of such costs included in interest expense. Debt issuance costs related to AFG’s revolving credit facilities will continue to be included in other assets in AFG’s Balance Sheet. Prior to AFG’s adoption of ASU 2015-03, AFG reported unamortized debt issuance costs as a deferred charge asset (included in other assets) in AFG’s Balance Sheet and the periodic amortization was included in other expenses in AFG’s Statement of Earnings. The updated guidance did not affect the overall recognition and measurement guidance for debt issuance costs. Accordingly, the guidance did not have an overall impact on AFG’s Shareholders’ Equity or results of operations.

Variable Annuity Assets and Liabilities   Separate accounts related to variable annuities represent the fair value of deposits invested in underlying investment funds on which AFG earns a fee. Investment funds are selected and may be changed only by the policyholder, who retains all investment risk.

AFG’s variable annuity contracts contain a guaranteed minimum death benefit (“GMDB”) to be paid if the policyholder dies before the annuity payout period commences. In periods of declining equity markets, the GMDB may exceed the value of the policyholder’s account. A GMDB liability is established for future excess death benefits using assumptions together with a range of reasonably possible scenarios for investment fund performance that are consistent with DPAC capitalization and amortization assumptions.

Premium Recognition   Property and casualty premiums are earned generally over the terms of the policies on a pro rata basis. Unearned premiums represent that portion of premiums written, which is applicable to the unexpired terms of policies in force. On reinsurance assumed from other insurance companies or written through various underwriting organizations, unearned premiums are based on information received from such companies and organizations. For traditional life, accident and health products, premiums are recognized as revenue when legally collectible from policyholders. For interest-sensitive life and universal life products, premiums are recorded in a policyholder account, which is reflected as a liability. Revenue is recognized as amounts are assessed against the policyholder account for mortality coverage and contract expenses.

Noncontrolling Interests   For balance sheet purposes, noncontrolling interests represent the interests of shareholders other than AFG in consolidated entities. In the statement of earnings, net earnings and losses attributable to noncontrolling interests represents such shareholders’ interest in the earnings and losses of those entities. Noncontrolling interests that are redeemable at the option of the holder are presented separately in the mezzanine section of the balance sheet (between liabilities and equity).

Income Taxes   Deferred income taxes are calculated using the liability method. Under this method, deferred income tax assets and liabilities are determined based on differences between financial reporting and tax bases and are measured using enacted tax rates. A valuation allowance is established to reduce total deferred tax assets to an amount that will more likely than not be realized.

AFG recognizes the tax benefits of uncertain tax positions only when the position is more likely than not to be sustained under examination by the appropriate taxing authority. Interest and penalties on AFG’s reserve for uncertain tax positions are recognized as a component of tax expense.

The effect of a change in tax rates on deferred tax assets and liabilities is recorded in net earnings in the period that includes the enactment date. This includes the impact on deferred tax assets or liabilities established through AOCI, which results in an amount equal to the difference between the deferred tax at the historical corporate rate and the newly enacted rate stranded in AOCI. As permitted under guidance adopted effective December 31, 2017 (ASU 2018-02), AFG reclassified the $145 million stranded in AOCI from accounting for the Tax Cuts and Jobs Act of 2017 to retained earnings at December 31, 2017. See Note L — “Income Taxes” for further information.

Stock-Based Compensation All share-based grants are recognized as compensation expense on a straight-line basis over their vesting periods based on their calculated fair value at the date of grant. AFG uses the Black-Scholes pricing model to measure the fair value of employee stock options. See Note K — “Shareholders’ Equity” for further information.

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In the fourth quarter of 2016, AFG early adopted ASU 2016-09, which, among other things, requires excess tax benefits or deficiencies for share-based payments to be recorded through income tax expense in the statement of earnings instead of directly to capital surplus (as required under the previous guidance). As a result, AFG’s Statement of Earnings includes a tax benefit of $17 million in 2017 and $9 million in 2016 that under the previous guidance would have been recorded directly to capital surplus. In addition, the new guidance allows entities to elect to account for forfeitures of awards when they occur rather than accruing expense based on an estimate of expected forfeitures (as required under the previous guidance). AFG has elected to account for forfeitures as they occur. The resulting cumulative effect of accounting change of less than $1 million was recorded directly to retained earnings on January 1, 2016.

Benefit Plans   AFG provides retirement benefits to qualified employees of participating companies through the AFG 401(k) Retirement and Savings Plan, a defined contribution plan. AFG makes all contributions to the retirement fund portion of the plan and matches a percentage of employee contributions to the savings fund. Company contributions are expensed in the year for which they are declared. AFG and many of its subsidiaries provide health care and life insurance benefits to eligible retirees. AFG also provides postemployment benefits to former or inactive employees (primarily those on disability) who were not deemed retired under other company plans. The projected future cost of providing these benefits is expensed over the period employees earn such benefits.

Earnings Per Share   Although basic earnings per share only considers shares of common stock outstanding during the period, the calculation of diluted earnings per share includes the following adjustments to weighted average common shares related to stock-based compensation plans: 2017 – 2.0 million, 2016 – 1.6 million and 2015 – 1.8 million.

AFG’s weighted average diluted shares outstanding excludes the following anti-dilutive potential common shares related to stock compensation plans: 2017 – none, 2016 – 0.4 million and 2015 – 1.1 million. Adjustments to net earnings attributable to shareholders in the calculation of diluted earnings per share were nominal in the 2017, 2016 and 2015 periods.

Statement of Cash Flows   For cash flow purposes, “investing activities” are defined as making and collecting loans and acquiring and disposing of debt or equity instruments and property and equipment. “Financing activities” include obtaining resources from owners and providing them with a return on their investments, borrowing money and repaying amounts borrowed. Annuity receipts, surrenders, benefits and withdrawals are also reflected as financing activities. All other activities are considered “operating.” Short-term investments having original maturities of three months or less when purchased are considered to be cash equivalents for purposes of the financial statements.

Effective October 1, 2016, AFG early adopted (on a retrospective basis) ASU 2016-15, which addresses the diversity in practice in how certain cash receipts and cash payments are presented in the statement of cash flows. Among other things, this guidance requires proceeds received from the settlement of corporate-owned life insurance policies to be classified as cash inflows from investing activities and allows premiums paid for policies to be reported as cash outflows either from investing activities or operating activities. AFG has elected to show all corporate-owned life insurance activity in investing activities. Prior to adoption of this guidance, AFG accounted for these transactions as operating activities. In addition, ASU 2016-15 clarifies when distributions received from investees accounted under the equity method should be accounted for as a cash inflow from operating activities or as a cash inflow from investing activities. AFG had previously accounted for all distributions from investments accounted for under the equity method as investing activities. The new guidance solely related to the presentation of certain transactions in the statement of cash flows. Accordingly, adoption of this guidance did not impact AFG’s results of operations or financial position.

Revenue Recognition Guidance Effective in 2018 In May 2014, the FASB issued ASU 2014-09, which requires an entity to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. Revenue is recognized when (or as) the entity satisfies a performance obligation under the contract. The new guidance also updates the accounting for certain costs associated with obtaining and fulfilling contracts with customers and requires disclosures regarding the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. Revenue recognition for insurance contracts and financial instruments, which are AFG’s primary sources of revenue, is excluded from the scope of the new guidance. AFG will adopt the new guidance effective January 1, 2018. Because the new guidance would have applied to 2% of AFG’s 2017 consolidated revenues and the impact of the new guidance on the recognition of those revenues would not have been material, management does not expect the new guidance to have a material impact on AFG’s results of operations and financial position.

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B.     Acquisitions and Sale of Businesses

Neon Lloyd’s Business   On December 29, 2017, AFG completed the sale of an indirect noncontrolling interest in Neon, its United Kingdom-based Lloyd’s insurer, to certain Neon executives for cash equal to the fair value of the interest sold as determined by a third-party valuation firm. Because AFG continues to have a controlling interest in Neon, the sale was accounted for as an equity transaction with the excess of the carrying value of the net assets attributable to the noncontrolling interest sold over the consideration received recorded as a $3 million reduction in AFG’s Capital Surplus. As discussed in Note L — “Income Taxes,” the sale of the noncontrolling interest also resulted in the recognition of a $56 million tax benefit, including a $48 million tax benefit previously deferred in the 2016 restructuring of the Neon Lloyd’s operations.

Acquisition of Noncontrolling Interest in National Interstate Corporation   On November 10, 2016, AFG acquired the 49% of National Interstate Corporation (“NATL”) not previously owned by AFG’s wholly-owned subsidiary, Great American Insurance Company for $315 million ($32.00 per share) in a merger transaction. In addition, NATL paid a one-time special cash dividend of $0.50 per share to its shareholders immediately prior to the merger closing ($5 million was paid to noncontrolling shareholders). Expenses related to the merger were approximately $10 million and were expensed as incurred.

Because NATL was already a consolidated subsidiary of AFG prior to the merger, the acquisition was accounted for as an equity transaction. As a result, the excess of the consideration paid over the carrying value of the noncontrolling interest acquired was recorded as a $137 million reduction in AFG’s Capital Surplus. In addition, the merger allowed NATL and its subsidiaries to become members of the AFG consolidated tax group, which resulted in a tax benefit of $66 million in the fourth quarter of 2016.

Sale of Long-term Care Business In December 2015, AFG completed the sale of substantially all of its run-off long-term care insurance business (which was included in the run-off long-term care and life segment) to HC2 Holdings, Inc. (“HC2”) for approximately $13 million in net proceeds. AFG may also receive up to $13 million of additional proceeds from HC2 in the future contingent upon the release of certain statutory-basis liabilities of the legal entities sold by AFG. In connection with obtaining regulatory approval for the transaction, AFG agreed to provide up to an aggregate of $35 million of capital support for the insurance companies, on an as-needed basis to maintain specified surplus levels, subject to immediate reimbursement by HC2 through a five-year capital maintenance agreement. The legal entities involved in the transaction, United Teacher Associates Insurance Company (“UTA”) and Continental General Insurance Company (“CGIC”), contained substantially all of AFG’s long-term care insurance reserves (96% as measured by net statutory reserves as of November 30, 2015), as well as smaller blocks of annuity and life insurance business. Following the sale of these subsidiaries, AFG has only a small block of long-term care insurance (1,600 policies) with approximately $39 million in reserves at December 31, 2017. AFG had ceased new sales of long-term care insurance in January 2010, but continued to accept renewal premiums on its outstanding policies, which are guaranteed renewable.

In addition to the net proceeds received at closing and the $13 million of potential additional proceeds in the future from the release of statutory liabilities, AFG received a total of $97 million in tax benefits in 2016 related to the sale through reduced estimated tax payments and a tax refund resulting from the carryback of the tax-basis capital loss. The receivables for these tax benefits were reflected in AFG’s financial statements at December 31, 2015.

Based on the status of ongoing negotiations at the end of the first quarter of 2015, management determined that the potential sale of the run-off long-term care insurance business met the GAAP “held for sale” criteria as of March 31, 2015. Accordingly, AFG recorded a $162 million pretax loss ($105 million loss after tax) in the first quarter of 2015 to establish a liability equal to the excess of the net carrying value of the assets and liabilities to be disposed over the estimated net sale proceeds. At the closing date, the loss was adjusted to $166 million ($108 million loss after tax) based on the actual proceeds received and the final carrying value of the net assets disposed. In the second quarter of 2016, AFG received additional proceeds based on the final closing balance sheet and adjusted certain accrued expense estimates associated with the sale, resulting in a $2 million pretax gain. At March 31, 2015 and at the sale date, the carrying value of the assets and liabilities disposed represented approximately 4% of both AFG’s assets and liabilities.

Under accounting guidance effective in January 2015, only disposals of components of an entity that represent a strategic shift and that have a major effect on a reporting entity’s operations and financial results are reported as discontinued operations. Due to the run-off nature of the business and the immaterial expected impact on AFG’s results of operations, the sale of AFG’s long-term care insurance business has not been reported as a discontinued operation.

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The impact of the sale of the run-off long-term care insurance business is shown below (in millions):

	December 24, 2015
Net sale proceeds (*)				$	13
Assets of businesses sold:
Cash and investments	$	1,334
Recoverables from reinsurers	630
Deferred policy acquisition costs	16
Other receivables	16
Other assets	(4		)
Goodwill	2
Total assets				1,994
Liabilities of businesses sold:
Annuity benefits accumulated	261
Life, accident and health reserves	1,525
Other liabilities	7
Total liabilities				1,793
Reclassify net unrealized gain on marketable securities				22
Net assets of businesses sold				179
Loss on subsidiaries, pretax				(166		)
Tax benefit				58
Loss on subsidiaries, net of tax				$	(108	)

(*) Includes the fair value of the potential additional consideration and capital maintenance agreement and is shown net of estimated expenses.

Revenues, costs and expenses, and earnings before income taxes for the subsidiaries sold were (in millions):

	Year ended
	December 31, 2015
Life, accident and health net earned premiums:
Long-term care	$	73
Life operations	11
Net investment income	73
Realized gains (losses) on securities and other income	(11		)
Total revenues	146
Annuity benefits	8
Life, accident and health benefits:
Long-term care	91
Life operations	11
Annuity and supplemental insurance acquisition expenses	12
Other expenses	16
Total costs and expenses	138
Earnings before income taxes	$	8

Other In addition to the loss on the sale of substantially all of AFG’s run-off long-term care insurance business (discussed above), AFG recorded a $5 million pretax realized gain in the third quarter of 2015 representing an adjustment to a previously recognized realized loss on a small property and casualty subsidiary sold several years ago.

C.    Segments of Operations

AFG manages its business as four segments: (i) Property and casualty insurance, (ii) Annuity, (iii) Run-off long-term care and life and (iv) Other, which includes holding company assets and costs, and the assets and operations attributable to the noncontrolling interests of the managed investment entities.

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AFG reports its property and casualty insurance business in the following Specialty sub-segments: (i) Property and transportation, which includes physical damage and liability coverage for buses, trucks and recreational vehicles, inland and ocean marine, agricultural-related products and other property coverages, (ii) Specialty casualty, which includes primarily excess and surplus, general liability, executive liability, professional liability, umbrella and excess liability, specialty coverage in targeted markets, customized programs for small to mid-sized businesses and workers’ compensation insurance, and (iii) Specialty financial, which includes risk management insurance programs for leasing and financing institutions (including collateral and lender-placed mortgage property insurance), surety and fidelity products and trade credit insurance. Premiums and underwriting profit included under Other specialty represent business assumed by AFG’s internal reinsurance program from the operations that make up AFG’s other Specialty sub-segments and amortization of deferred gains on retroactive reinsurance transactions related to the sales of businesses in prior years. AFG’s annuity business markets traditional fixed and fixed-indexed annuities in the retail, financial institutions and education markets. AFG’s reportable segments and their components were determined based primarily upon similar economic characteristics, products and services.

Sales of property and casualty insurance outside of the United States represented 5% of AFG’s revenues in 2017 and 4% of AFG’s revenues in 2016 and 2015.

The following tables (in millions) show AFG’s assets, revenues and earnings before income taxes by segment and sub-segment.

	2017		2016		2015
Assets
Property and casualty insurance (a)	$	17,171	$	15,574	$	14,689
Annuity	37,179		33,409		29,865
Run-off long-term care and life	730		752		772
Other	5,578		5,337		4,511
Total assets	$	60,658	$	55,072	$	49,837

Revenues
Property and casualty insurance:
Premiums earned:
Specialty
Property and transportation	$	1,711	$	1,662	$	1,599
Specialty casualty	2,186		2,006		2,011
Specialty financial	576		557		517
Other specialty	106		103		97
Total premiums earned	4,579		4,328		4,224
Net investment income	362		350		319
Other income (b)	28		51		78
Total property and casualty insurance	4,969		4,729		4,621
Annuity:
Net investment income	1,458		1,356		1,224
Other income	103		103		98
Total annuity	1,561		1,459		1,322
Run-off long-term care and life (c)	47		49		188
Other	283		240		194
Total revenues before realized gains (losses)	6,860		6,477		6,325
Realized gains (losses) on securities	5		19		(19		)
Realized gains (losses) on subsidiaries	—		2		(161		)
Total revenues	$	6,865	$	6,498	$	6,145

(a) Not allocable to sub-segments.

(b) Includes income of $32 million (before noncontrolling interest) from the sale of an apartment property in 2016 and $66 million (before noncontrolling interest) from the sales of a hotel and an apartment property in 2015.

(c) AFG sold substantially all of its run-off long-term care insurance business in December 2015.

F-15

AMERICAN FINANCIAL GROUP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

	2017			2016			2015
Earnings Before Income Taxes
Property and casualty insurance:
Underwriting:
Specialty
Property and transportation	$	154		$	166		$	48
Specialty casualty	104			78			146
Specialty financial	61			84			87
Other specialty	(2		)	9			14
Other lines (a)	(75		)	(101		)	(70		)
Total underwriting	242			236			225
Investment and other income, net (b)	349			341			351
Total property and casualty insurance	591			577			576
Annuity	380			368			331
Run-off long-term care and life (c)	6			2			14
Other (d)	(258		)	(181		)	(176		)
Total earnings before realized gains (losses) and income taxes	719			766			745
Realized gains (losses) on securities	5			19			(19		)
Realized gains (losses) on subsidiaries	—			2			(161		)
Total earnings before income taxes	$	724		$	787		$	565

(a) Includes special charges to increase asbestos and environmental (“A&E”) reserves of $89 million, $36 million and $67 million in 2017, 2016 and 2015, respectively. Also includes $18 million in favorable development related to the Neon exited lines recorded in connection with a reinsurance to close transaction in 2017 and a charge of $65 million related to Neon exited lines in 2016.

(b) Includes income of $32 million (before noncontrolling interest) from the sale of an apartment property in 2016 and $66 million (before noncontrolling interest) from the sales of a hotel and an apartment property in 2015.

(c) AFG sold substantially all of its run-off long-term care insurance business in December 2015.

(d) Primarily holding company interest and expenses, including losses on retirement of debt of $51 million in 2017 and $4 million in 2015, and special charges to increase A&E reserves related to AFG’s former railroad and manufacturing operations ($24 million in 2017, $5 million in 2016 and $12 million in 2015).

F-16

AMERICAN FINANCIAL GROUP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

D.    Fair Value Measurements

Accounting standards for measuring fair value are based on inputs used in estimating fair value. The three levels of the hierarchy are as follows:

Level 1 — Quoted prices for identical assets or liabilities in active markets (markets in which transactions occur with sufficient frequency and volume to provide pricing information on an ongoing basis). AFG’s Level 1 financial instruments consist primarily of publicly traded equity securities and highly liquid government bonds for which quoted market prices in active markets are available and short-term investments of managed investment entities.

Level 2 — Quoted prices for similar instruments in active markets; quoted prices for identical or similar assets or liabilities in inactive markets (markets in which there are few transactions, the prices are not current, price quotations vary substantially over time or among market makers, or in which little information is released publicly); and valuations based on other significant inputs that are observable in active markets. AFG’s Level 2 financial instruments include separate account assets, corporate and municipal fixed maturity securities, asset-backed securities, mortgage-backed securities (“MBS”) and investments of managed investment entities priced using observable inputs. Level 2 inputs include benchmark yields, reported trades, corroborated broker/dealer quotes, issuer spreads and benchmark securities. When non-binding broker quotes can be corroborated by comparison to similar securities priced using observable inputs, they are classified as Level 2.

Level 3 — Valuations derived from market valuation techniques generally consistent with those used to estimate the fair values of Level 2 financial instruments in which one or more significant inputs are unobservable or when the market for a security exhibits significantly less liquidity relative to markets supporting Level 2 fair value measurements. The unobservable inputs may include management’s own assumptions about the assumptions market participants would use based on the best information available at the valuation date. AFG’s Level 3 is comprised of financial instruments whose fair value is estimated based on non-binding broker quotes or internally developed using significant inputs not based on, or corroborated by, observable market information.

As discussed in Note A — “Accounting Policies — Managed Investment Entities,” AFG has set the carrying value of its CLO liabilities equal to the fair value of the CLO assets (which have more observable fair values) as an alternative to reporting those liabilities at separately measured fair values. As a result, the CLO liabilities are categorized within the fair value hierarchy on the same basis (proportionally) as the related CLO assets. Since the portion of the CLO liabilities allocated to Level 3 is derived from the fair value of the CLO assets, these amounts are excluded from the progression of Level 3 financial instruments.

AFG’s management is responsible for the valuation process and uses data from outside sources (including nationally recognized pricing services and broker/dealers) in establishing fair value. AFG’s internal investment professionals are a group of approximately 25 analysts whose primary responsibility is to manage AFG’s investment portfolio. These professionals monitor individual investments as well as overall industries and are active in the financial markets on a daily basis. The group is led by AFG’s chief investment officer, who reports directly to one of AFG’s Co-CEOs. Valuation techniques utilized by pricing services and prices obtained from external sources are reviewed by AFG’s internal investment professionals who are familiar with the securities being priced and the markets in which they trade to ensure the fair value determination is representative of an exit price. To validate the appropriateness of the prices obtained, these investment managers consider widely published indices (as benchmarks), recent trades, changes in interest rates, general economic conditions and the credit quality of the specific issuers. In addition, the Company communicates directly with the pricing services regarding the methods and assumptions used in pricing, including verifying, on a test basis, the inputs used by the service to value specific securities.

F-17

AMERICAN FINANCIAL GROUP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

Assets and liabilities measured and carried at fair value in the financial statements are summarized below (in millions):

	Level 1		Level 2			Level 3		Total
December 31, 2017
Assets:
Available for sale (“AFS”) fixed maturities:
U.S. Government and government agencies	$	122	$	112		$	8	$	242
States, municipalities and political subdivisions	—		6,975			148		7,123
Foreign government	—		127			—		127
Residential MBS	—		3,105			122		3,227
Commercial MBS	—		926			36		962
Asset-backed securities (“ABS”)	—		7,218			744		7,962
Corporate and other	30		17,662			1,044		18,736
Total AFS fixed maturities	152		36,125			2,102		38,379
Trading fixed maturities	44		304			—		348
Equity securities — AFS and trading	1,411		86			165		1,662
Assets of managed investment entities (“MIE”)	307		4,572			23		4,902
Variable annuity assets (separate accounts) (*)	—		644			—		644
Equity index call options	—		701			—		701
Other assets — derivatives	—		—			—		—
Total assets accounted for at fair value	$	1,914	$	42,432		$	2,290	$	46,636
Liabilities:
Liabilities of managed investment entities	$	293	$	4,372		$	22	$	4,687
Derivatives in annuity benefits accumulated	—		—			2,542		2,542
Other liabilities — derivatives	—		35			—		35
Total liabilities accounted for at fair value	$	293	$	4,407		$	2,564	$	7,264
December 31, 2016
Assets:
Available for sale fixed maturities:
U.S. Government and government agencies	$	133	$	174		$	8	$	315
States, municipalities and political subdivisions	—		6,641			140		6,781
Foreign government	—		136			—		136
Residential MBS	—		3,445			190		3,635
Commercial MBS	—		1,468			25		1,493
Asset-backed securities	—		5,475			484		5,959
Corporate and other	29		15,484			712		16,225
Total AFS fixed maturities	162		32,823			1,559		34,544
Trading fixed maturities	30		329			—		359
Equity securities — AFS and trading	1,305		79			174		1,558
Assets of managed investment entities	380		4,356			29		4,765
Variable annuity assets (separate accounts) (*)	—		600			—		600
Equity index call options	—		492			—		492
Other assets — derivatives	—		1			—		1
Total assets accounted for at fair value	$	1,877	$	38,680		$	1,762	$	42,319
Liabilities:
Liabilities of managed investment entities	$	363	$	4,158		$	28	$	4,549
Derivatives in annuity benefits accumulated	—		—			1,759		1,759
Derivatives in long-term debt	—		(1		)	—		(1		)
Other liabilities — derivatives	—		30			—		30
Total liabilities accounted for at fair value	$	363	$	4,187		$	1,787	$	6,337

 (*)   Variable annuity liabilities equal the fair value of variable annuity assets.

F-18

AMERICAN FINANCIAL GROUP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

The transfers between Level 1 and Level 2 for the years ended December 31, 2017, 2016 and 2015 are reflected in the table below at fair value as of the end of the reporting period (dollars in millions):

	Level 2 To Level 1 Transfers									Level 1 To Level 2 Transfers
	# of Transfers			Fair Value						# of Transfers			Fair Value
	2017	2016	2015	2017		2016		2015		2017	2016	2015	2017		2016		2015
Perpetual preferred stocks	4	6	5	$	23	$	35	$	19	2	7	7	$	11	$	28	$	31
Common stocks	—	3	7	—		—		80		1	2	—	—		—		—
Redeemable preferred stocks	—	—	2	—		—		11		—	—	—	—		—		—

Transfers between Level 1 and Level 2 for all periods presented were a result of increases or decreases in observable trade activity.

Approximately 5% of the total assets carried at fair value on December 31, 2017, were Level 3 assets. Approximately 79% ($1.80 billion) of the Level 3 assets were priced using non-binding broker quotes, for which there is a lack of transparency as to the inputs used to determine fair value. Details as to the quantitative inputs are neither provided by the brokers nor otherwise reasonably obtainable by AFG. Since internally developed Level 3 asset fair values represent less than 10% of AFG’s Shareholders’ Equity, any justifiable changes in unobservable inputs used to determine internally developed fair values would not have a material impact on AFG’s financial position.

The only significant Level 3 assets or liabilities carried at fair value in the financial statements that were not measured using broker quotes are the derivatives embedded in AFG’s fixed-indexed annuity liabilities, which are measured using a discounted cash flow approach and had a fair value of $2.54 billion at December 31, 2017. The following table presents information about the unobservable inputs used by management in determining fair value of these embedded derivatives. See Note F — “Derivatives.”

Unobservable Input	Range
Adjustment for insurance subsidiary’s credit risk	0.2% – 2.0% over the risk free rate
Risk margin for uncertainty in cash flows	0.70% reduction in the discount rate
Surrenders	3% – 23% of indexed account value
Partial surrenders	2% – 10% of indexed account value
Annuitizations	0.1% – 1% of indexed account value
Deaths	1.6% – 8.0% of indexed account value
Budgeted option costs	2.4% – 3.6% of indexed account value

The range of adjustments for insurance subsidiary’s credit risk reflects credit spread variations across the yield curve. The range of projected surrender rates reflects the specific surrender charges and other features of AFG’s individual fixed-indexed annuity products with an expected range of 6% to 10% in the majority of future calendar years (3% to 23% over all periods). Increasing the budgeted option cost or risk margin for uncertainty in cash flow assumptions in the table above would increase the fair value of the fixed-indexed annuity embedded derivatives, while increasing any of the other unobservable inputs in the table above would decrease the fair value of the embedded derivatives.

F-19

AMERICAN FINANCIAL GROUP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

Changes in balances of Level 3 financial assets and liabilities carried at fair value during 2017, 2016 and 2015 are presented below (in millions). The transfers into and out of Level 3 were due to changes in the availability of market observable inputs. All transfers are reflected in the table at fair value as of the end of the reporting period.

				Total realized/unrealized gains (losses) included in
	Balance at December 31, 2016			Net earnings			Other comprehensive income (loss)		Purchases and issuances			Sales and settlements			Transfer into Level 3		Transfer out of Level 3			Balance at December 31, 2017
AFS fixed maturities:
U.S. government agency	$	8		$	—		$	—	$	—		$	—		$	—	$	—		$	8
State and municipal	140			—			2		—			(2		)	10		(2		)	148
Residential MBS	190			(4		)	2		1			(40		)	44		(71		)	122
Commercial MBS	25			2			—		15			(10		)	4		—			36
Asset-backed securities	484			—			1		410			(132		)	202		(221		)	744
Corporate and other	712			(5		)	2		606			(237		)	29		(63		)	1,044
Total AFS fixed maturities	1,559			(7		)	7		1,032			(421		)	289		(357		)	2,102
Equity securities	174			(21		)	10		38			(16		)	—		(20		)	165
Assets of MIE	29			(11		)	—		9			—			—		(4		)	23
Total Level 3 assets	$	1,762		$	(39	)	$	17	$	1,079		$	(437	)	$	289	$	(381	)	$	2,290
Embedded derivatives (a)	$	(1,759	)	$	(589	)	$	—	$	(300	)	$	106		$	—	$	—		$	(2,542	)
Total Level 3 liabilities (b)	$	(1,759	)	$	(589	)	$	—	$	(300	)	$	106		$	—	$	—		$	(2,542	)

(a) Total realized/unrealized gains (losses) included in net earnings for the embedded derivatives reflects losses related to the unlocking of actuarial assumptions of $25 million in 2017.

(b) As previously discussed, these tables exclude the portion of MIE liabilities allocated to Level 3, which are derived from the fair value of the MIE assets.

				Total realized/unrealized gains (losses) included in
	Balance at December 31, 2015			Net earnings			Other comprehensive income (loss)			Purchases and issuances			Sales and settlements			Transfer into Level 3		Transfer out of Level 3			Balance at December 31, 2016
AFS fixed maturities:
U.S. government agency	$	15		$	(8	)	$	1		$	—		$	—		$	—	$	—		$	8
State and municipal	89			—			(4		)	57			(2		)	—		—			140
Residential MBS	224			(4		)	(2		)	8			(28		)	34		(42		)	190
Commercial MBS	39			(1		)	—			—			(7		)	—		(6		)	25
Asset-backed securities	470			(1		)	1			50			(52		)	60		(44		)	484
Corporate and other	633			—			(10		)	176			(100		)	30		(17		)	712
Total AFS fixed maturities	1,470			(14		)	(14		)	291			(189		)	124		(109		)	1,559
Equity securities	140			(12		)	35			44			(28		)	15		(20		)	174
Assets of MIE	26			(9		)	—			12			—			—		—			29
Total Level 3 assets	$	1,636		$	(35	)	$	21		$	347		$	(217	)	$	139	$	(129	)	$	1,762
Embedded derivatives (a)	$	(1,369	)	$	(211	)	$	—		$	(277	)	$	98		$	—	$	—		$	(1,759	)
Total Level 3 liabilities (b)	$	(1,369	)	$	(211	)	$	—		$	(277	)	$	98		$	—	$	—		$	(1,759	)

(a) Total realized/unrealized gains (losses) included in net earnings for the embedded derivatives reflects losses related to the unlocking of actuarial assumptions of $17 million in 2016.

(b) As previously discussed, these tables exclude the portion of MIE liabilities allocated to Level 3, which are derived from the fair value of the MIE assets.

F-20

AMERICAN FINANCIAL GROUP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

						Total realized/unrealized gains (losses) included in
	Bal. at Dec. 31, 2014			Impact of accounting change (b)		Net earnings			Other comprehensive income (loss)			Purchases and issuances			Sales and settlements			Transfer into Level 3		Transfer out of Level 3			Sale of subsidiaries			Bal. at Dec. 31, 2015
AFS fixed maturities:
U.S. government agency	$	15		$	—	$	—		$	—		$	—		$	—		$	—	$	—		$	—		$	15
State and municipal	100			—		—			(1		)	34			(1		)	2		(39		)	(6		)	89
Residential MBS	300			—		(11		)	(1		)	—			(34		)	86		(88		)	(28		)	224
Commercial MBS	44			—		(1		)	(1		)	—			(2		)	4		(1		)	(4		)	39
Asset-backed securities	226			—		1			(7		)	265			(56		)	53		(10		)	(2		)	470
Corporate and other	546			—		(5		)	(9		)	161			(90		)	41		(5		)	(6		)	633
Total AFS fixed maturities	1,231			—		(16		)	(19		)	460			(183		)	186		(143		)	(46		)	1,470
Equity securities	93			—		(4		)	(9		)	77			—			—		(17		)	—			140
Assets of MIE	31			—		(11		)	—			6			—			—		—			—			26
Total Level 3 assets	$	1,355		$	—	$	(31	)	$	(28	)	$	543		$	(183	)	$	186	$	(160	)	$	(46	)	$	1,636
Liabilities of MIE	$	(2,701	)	$	2,701	$	—		$	—		$	—		$	—		$	—	$	—		$	—		$	—
Embedded derivatives (a)	(1,160		)	—		(17		)	—			(257		)	65			—		—			—			(1,369		)
Total Level 3 liabilities	$	(3,861	)	$	2,701	$	(17	)	$	—		$	(257	)	$	65		$	—	$	—		$	—		$	(1,369	)

(a) Total realized/unrealized gains (losses) included in net earnings for the embedded derivatives reflects losses related to the unlocking of actuarial assumptions of $28 million in 2015.

(b) The impact of implementing new guidance adopted in 2015, as discussed in Note A — “Accounting Policies — Managed Investment Entities.”

F-21

AMERICAN FINANCIAL GROUP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

Fair Value of Financial Instruments   The carrying value and fair value of financial instruments that are not carried at fair value in the financial statements at December 31 are summarized below (in millions):

	Carrying		Fair Value
	Value		Total		Level 1		Level 2		Level 3
2017
Financial assets:
Cash and cash equivalents	$	2,338	$	2,338	$	2,338	$	—	$	—
Mortgage loans	1,125		1,119		—		—		1,119
Policy loans	184		184		—		—		184
Total financial assets not accounted for at fair value	$	3,647	$	3,641	$	2,338	$	—	$	1,303
Financial liabilities:
Annuity benefits accumulated (*)	$	33,110	$	32,461	$	—	$	—	$	32,461
Long-term debt	1,301		1,354		—		1,351		3
Total financial liabilities not accounted for at fair value	$	34,411	$	33,815	$	—	$	1,351	$	32,464
2016
Financial assets:
Cash and cash equivalents	$	2,107	$	2,107	$	2,107	$	—	$	—
Mortgage loans	1,147		1,146		—		—		1,146
Policy loans	192		192		—		—		192
Total financial assets not accounted for at fair value	$	3,446	$	3,445	$	2,107	$	—	$	1,338
Financial liabilities:
Annuity benefits accumulated (*)	$	29,703	$	28,932	$	—	$	—	$	28,932
Long-term debt	1,284		1,356		—		1,353		3
Total financial liabilities not accounted for at fair value	$	30,987	$	30,288	$	—	$	1,353	$	28,935

(*) Excludes $206 million and $204 million of life contingent annuities in the payout phase at December 31, 2017 and 2016, respectively.

The carrying amount of cash and cash equivalents approximates fair value. Fair values for mortgage loans are estimated by discounting the future contractual cash flows using the current rates at which similar loans would be made to borrowers with similar credit ratings. The fair value of policy loans is estimated to approximate carrying value; policy loans have no defined maturity dates and are inseparable from insurance contracts. The fair value of annuity benefits was estimated based on expected cash flows discounted using forward interest rates adjusted for the Company’s credit risk and includes the impact of maintenance expenses and capital costs. Fair values of long-term debt are based primarily on quoted market prices.

F-22

AMERICAN FINANCIAL GROUP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

E.    Investments

Available for sale fixed maturities and equity securities at December 31 consisted of the following (in millions):

	2017												2016
	Amortized Cost		Gross Unrealized					Net Unrealized			Fair Value		Amortized Cost		Gross Unrealized					Net Unrealized			Fair Value
			Gains		Losses										Gains		Losses
Fixed maturities:
U.S. Government and government agencies	$	244	$	1	$	(3	)	$	(2	)	$	242	$	315	$	3	$	(3	)	$	—		$	315
States, municipalities and political subdivisions	6,887		254		(18		)	236			7,123		6,650		200		(69		)	131			6,781
Foreign government	124		3		—			3			127		131		5		—			5			136
Residential MBS	2,884		349		(6		)	343			3,227		3,367		281		(13		)	268			3,635
Commercial MBS	927		36		(1		)	35			962		1,446		49		(2		)	47			1,493
Asset-backed securities	7,836		142		(16		)	126			7,962		5,962		43		(46		)	(3		)	5,959
Corporate and other	18,136		638		(38		)	600			18,736		15,864		473		(112		)	361			16,225
Total fixed maturities	$	37,038	$	1,423	$	(82	)	$	1,341		$	38,379	$	33,735	$	1,054	$	(245	)	$	809		$	34,544
Equity Securities:
Common stocks	$	786	$	263	$	(22	)	$	241		$	1,027	$	879	$	160	$	(23	)	$	137		$	1,016
Perpetual preferred stocks	535		39		(1		)	38			573		472		21		(7		)	14			486
Total equity securities	$	1,321	$	302	$	(23	)	$	279		$	1,600	$	1,351	$	181	$	(30	)	$	151		$	1,502

The non-credit related portion of other-than-temporary impairment charges is included in other comprehensive income. Cumulative non-credit charges taken for securities still owned at December 31, 2017 and December 31, 2016, respectively, were $158 million and $189 million. Gross unrealized gains on such securities at December 31, 2017 and December 31, 2016 were $137 million and $130 million, respectively. Gross unrealized losses on such securities at December 31, 2017 and December 31, 2016 were $4 million and $3 million, respectively. These amounts represent the non-credit other-than-temporary impairment charges recorded in AOCI adjusted for subsequent changes in fair values and relate primarily to residential MBS.

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AMERICAN FINANCIAL GROUP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

The following tables show gross unrealized losses (dollars in millions) on available for sale fixed maturities and equity securities by investment category and length of time that individual securities have been in a continuous unrealized loss position at December 31, 2017 and 2016.

	Less Than Twelve Months							Twelve Months or More
	Unrealized Loss			Fair Value		Fair Value as % of Cost		Unrealized Loss			Fair Value		Fair Value as % of Cost
2017
Fixed maturities:
U.S. Government and government agencies	$	—		$	55	100	%	$	(3	)	$	123	98	%
States, municipalities and political subdivisions	(8		)	825		99	%	(10		)	431		98	%
Foreign government	—			4		100	%	—			—		—	%
Residential MBS	(1		)	118		99	%	(5		)	118		96	%
Commercial MBS	(1		)	67		99	%	—			—		—	%
Asset-backed securities	(7		)	1,195		99	%	(9		)	299		97	%
Corporate and other	(20		)	2,031		99	%	(18		)	603		97	%
Total fixed maturities	$	(37	)	$	4,295	99	%	$	(45	)	$	1,574	97	%
Equity securities:
Common stocks	$	(22	)	$	117	84	%	$	—		$	—	—	%
Perpetual preferred stocks	—			41		100	%	(1		)	13		93	%
Total equity securities	$	(22	)	$	158	88	%	$	(1	)	$	13	93	%
2016
Fixed maturities:
U.S. Government and government agencies	$	(1	)	$	153	99	%	$	(2	)	$	8	80	%
States, municipalities and political subdivisions	(64		)	2,289		97	%	(5		)	44		90	%
Residential MBS	(7		)	502		99	%	(6		)	162		96	%
Commercial MBS	(2		)	121		98	%	—			—		—	%
Asset-backed securities	(29		)	1,737		98	%	(17		)	634		97	%
Corporate and other	(93		)	3,849		98	%	(19		)	312		94	%
Total fixed maturities	$	(196	)	$	8,651	98	%	$	(49	)	$	1,160	96	%
Equity securities:
Common stocks	$	(23	)	$	215	90	%	$	—		$	—	—	%
Perpetual preferred stocks	(6		)	135		96	%	(1		)	6		86	%
Total equity securities	$	(29	)	$	350	92	%	$	(1	)	$	6	86	%

At December 31, 2017, the gross unrealized losses on fixed maturities of $82 million relate to 841 securities. Investment grade securities (as determined by nationally recognized rating agencies) represented approximately 78% of the gross unrealized loss and 90% of the fair value.

F-24

AMERICAN FINANCIAL GROUP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

The determination of whether unrealized losses are “other-than-temporary” requires judgment based on subjective as well as objective factors.Factors considered and resources used by management include:

a) whether the unrealized loss is credit-driven or a result of changes in market interest rates,

b) the extent to which fair value is less than cost basis,

c) cash flow projections received from independent sources,

d) historical operating, balance sheet and cash flow data contained in issuer SEC filings and news releases,

e) near-term prospects for improvement in the issuer and/or its industry,

f) third party research and communications with industry specialists,

g) financial models and forecasts,

h) the continuity of dividend payments, maintenance of investment grade ratings and hybrid nature of certain investments,

i) discussions with issuer management, and

j) ability and intent to hold the investment for a period of time sufficient to allow for anticipated recovery in fair value.

AFG analyzes its MBS securities for other-than-temporary impairment each quarter based upon expected future cash flows. Management estimates expected future cash flows based upon its knowledge of the MBS market, cash flow projections (which reflect loan to collateral values, subordination, vintage and geographic concentration) received from independent sources, implied cash flows inherent in security ratings and analysis of historical payment data. During 2017, AFG recorded $1 million in other-than-temporary impairment charges related to its residential MBS.

In 2017, AFG recorded approximately $19 million and $4 million in other-than-temporary impairment charges related to other fixed maturities (other than residential MBS securities) and other investments, respectively.

AFG recorded $55 million in other-than-temporary impairment charges on common stocks in 2017. At December 31, 2017, the gross unrealized losses on common stocks of $22 million relate to 16 securities, none of which has been in an unrealized loss position for more than 12 months.

AFG recorded $9 million in other-than-temporary impairment charges on preferred stock in 2017. At December 31, 2017, the gross unrealized losses on preferred stocks of $1 million relate to 7 securities. Three preferred stocks have been in an unrealized loss position for 12 months or more and all are investment grade rated.

Management believes AFG will recover its cost basis in the securities with unrealized losses and that AFG has the ability to hold the securities until they recover in value and had no intent to sell them at December 31, 2017. As discussed in Note A — “Accounting Policies — Investments,” effective January 1, 2018, all equity securities currently classified as “available for sale” will be required to be carried at fair value through net earnings instead of accumulated other comprehensive income and will therefore no longer be evaluated for other-than-temporary impairment.

A progression of the credit portion of other-than-temporary impairments on fixed maturity securities for which the non-credit portion of an impairment has been recognized in other comprehensive income is shown below (in millions):

	2017			2016			2015
Balance at January 1	$	153		$	160		$	170
Additional credit impairments on:
Previously impaired securities	1			2			1
Securities without prior impairments	3			1			2
Reductions due to:
Sales or redemptions	(12		)	(10		)	(9		)
Sale of subsidiaries	—			—			(4		)
Balance at December 31	$	145		$	153		$	160

F-25

AMERICAN FINANCIAL GROUP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

The table below sets forth the scheduled maturities of available for sale fixed maturities as of December 31, 2017 (dollars in millions). Securities with sinking funds are reported at average maturity. Actual maturities may differ from contractual maturities because certain securities may be called or prepaid by the issuers.

	Amortized		Fair Value
	Cost		Amount		%
Maturity
One year or less	$	746	$	759	2	%
After one year through five years	6,730		6,939		18	%
After five years through ten years	13,235		13,662		35	%
After ten years	4,680		4,868		13	%
	25,391		26,228		68	%
ABS (average life of approximately 5 years)	7,836		7,962		21	%
MBS (average life of approximately 4.5 years)	3,811		4,189		11	%
Total	$	37,038	$	38,379	100	%

Certain risks are inherent in fixed maturity securities, including loss upon default, price volatility in reaction to changes in interest rates, and general market factors and risks associated with reinvestment of proceeds due to prepayments or redemptions in a period of declining interest rates.

There were no investments in individual issuers that exceeded 10% of shareholders’ equity at December 31, 2017 or 2016.

F-26

AMERICAN FINANCIAL GROUP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

Net Unrealized Gain on Marketable Securities In addition to adjusting fixed maturity securities and equity securities classified as “available for sale” to fair value, GAAP requires that deferred policy acquisition costs and certain other balance sheet amounts related to annuity, long-term care and life businesses be adjusted to the extent that unrealized gains and losses from securities would result in adjustments to those balances had the unrealized gains or losses actually been realized. The following table shows (in millions) the components of the net unrealized gain on securities that is included in AOCI in AFG’s Balance Sheet.

	Pretax			Deferred Tax			Net
December 31, 2017
Net unrealized gain on:
Fixed maturities — annuity segment (a)	$	1,082		$	(227	)	$	855
Fixed maturities — all other	259			(55		)	204
Total fixed maturities	1,341			(282		)	1,059
Equity securities (b)	279			(58		)	221
Total investments	1,620			(340		)	1,280
Deferred policy acquisition costs — annuity segment	(433		)	91			(342		)
Annuity benefits accumulated	(137		)	29			(108		)
Unearned revenue	13			(3		)	10
Total net unrealized gain on marketable securities	$	1,063		$	(223	)	$	840
December 31, 2016
Net unrealized gain on:
Fixed maturities — annuity segment (a)	$	640		$	(224	)	$	416
Fixed maturities — all other	169			(59		)	110
Total fixed maturities	809			(283		)	526
Equity securities (b)	151			(53		)	98
Total investments	960			(336		)	624
Deferred policy acquisition costs — annuity segment	(273		)	96			(177		)
Annuity benefits accumulated	(78		)	27			(51		)
Unearned revenue	13			(5		)	8
Total net unrealized gain on marketable securities	$	622		$	(218	)	$	404

(a) Net unrealized gains on fixed maturity investments supporting AFG’s annuity benefits accumulated.

(b) As discussed in Note A — “Accounting Policies — Investments,” effective January 1, 2018, all equity securities currently classified as “available for sale” will be required to be carried at fair value through net earnings instead of AOCI.

Real Estate and Other Investments Real estate and other investments on AFG’s Balance Sheet includes the following at December 31 (in millions):

	2017		2016
Limited partnerships and similar investments accounted for using the equity method	$	999	$	688
Directly owned real estate	164		197
Other investments	148		149
Total real estate and other investments	$	1,311	$	1,034

F-27

AMERICAN FINANCIAL GROUP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

Net Investment Income   The following table shows (in millions) investment income earned and investment expenses incurred.

	2017			2016			2015
Investment income:
Fixed maturities	$	1,607		$	1,510		$	1,461
Equity securities	79			81			76
Equity in earnings of partnerships and similar investments	64			44			27
Other	102			81			87
Gross investment income	1,852			1,716			1,651
Investment expenses	(21		)	(20		)	(18		)
Net investment income	$	1,831		$	1,696		$	1,633

Realized gains (losses) and changes in unrealized appreciation (depreciation) related to fixed maturity and equity security investments are summarized as follows (in millions):

	2017												2016
	Realized gains (losses)												Realized gains (losses)
	Before Impairments			Impairments			Total			Change in Unrealized			Before Impairments			Impairments			Total			Change in Unrealized
Fixed maturities	$	17		$	(20	)	$	(3	)	$	532		$	36		$	(38	)	$	(2	)	$	90
Equity securities	70			(64		)	6			128			106			(93		)	13			67
Mortgage loans and other investments	(6		)	(4		)	(10		)	—			—			—			—			—
Other (*)	(3		)	15			12			(219		)	(7		)	15			8			(52		)
Total pretax	78			(73		)	5			441			135			(116		)	19			105
Tax effects	(27		)	25			(2		)	(5		)	(48		)	41			(7		)	(37		)
Noncontrolling interests	—			—			—			—			(2		)	3			1			4
Net of tax and noncontrolling interests	$	51		$	(48	)	$	3		$	436		$	85		$	(72	)	$	13		$	72

	2015
	Realized gains (losses)
	Before Impairments			Impairments			Total			Change in Unrealized
Fixed maturities	$	19		$	(43	)	$	(24	)	$	(941	)
Equity securities	94			(94		)	—			(134		)
Mortgage loans and other investments	(2		)	(3		)	(5		)	—
Other (*)	(5		)	15			10			430
Total pretax	106			(125		)	(19		)	(645		)
Tax effects	(38		)	45			7			226
Noncontrolling interests	(2		)	2			—			8
Net of tax and noncontrolling interests	$	66		$	(78	)	$	(12	)	$	(411	)

(*) Primarily adjustments to deferred policy acquisition costs and reserves related to the annuity business.

F-28

AMERICAN FINANCIAL GROUP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

Gross realized gains and losses (excluding impairment write-downs and mark-to-market of derivatives) on available for sale fixed maturity and equity security investment transactions consisted of the following (in millions):

	2017			2016			2015
Fixed maturities:
Gross gains	$	43		$	55		$	38
Gross losses	(20		)	(10		)	(7		)
Equity securities:
Gross gains	87			110			99
Gross losses	(17		)	(4		)	(5		)

F.    Derivatives

As discussed under “Derivatives” in Note A— “Accounting Policies,” AFG uses derivatives in certain areas of its operations.

Derivatives That Do Not Qualify for Hedge Accounting   The following derivatives that do not qualify for hedge accounting under GAAP are included in AFG’s Balance Sheet at fair value (in millions):

		December 31, 2017				December 31, 2016
Derivative	Balance Sheet Line	Asset		Liability		Asset		Liability
MBS with embedded derivatives	Fixed maturities	$	105	$	—	$	107	$	—
Public company warrants	Equity securities	4		—		4		—
Fixed-indexed annuities (embedded derivative)	Annuity benefits accumulated	—		2,542		—		1,759
Equity index call options	Equity index call options	701		—		492		—
Reinsurance contract (embedded derivative)	Other liabilities	—		4		—		8
		$	810	$	2,546	$	603	$	1,767

The MBS with embedded derivatives consist primarily of interest-only MBS with interest rates that float inversely with short-term rates. AFG records the entire change in the fair value of these securities in earnings. These investments are part of AFG’s overall investment strategy and represent a small component of AFG’s overall investment portfolio.

Warrants to purchase shares of publicly traded companies, which represent a small component of AFG’s overall investment portfolio, are considered to be derivatives that are required to be carried at fair value through earnings.

AFG’s fixed-indexed annuities provide policyholders with a crediting rate tied, in part, to the performance of an existing stock market or other financial index. AFG attempts to mitigate the risk in the index-based component of these products through the purchase of call options on the appropriate index. AFG receives collateral from certain of its counterparties to support its purchased call option assets. This collateral ($389 million at December 31, 2017 and $380 million at December 31, 2016) is included in other assets in AFG’s Balance Sheet with an offsetting liability to return the collateral, which is included in other liabilities. AFG’s strategy is designed so that the change in the fair value of the call option assets will generally offset the economic change in the liabilities from the index participation. Both the index-based component of the annuities and the related call options are considered derivatives. Fluctuations in interest rates and the stock market, among other factors, can cause volatility in the periodic measurement of fair value of the embedded derivative that management believes can be inconsistent with the long-term economics of these products.

As discussed under “Reinsurance” in Note A, AFG has a reinsurance contract that is considered to contain an embedded derivative.

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AMERICAN FINANCIAL GROUP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

The following table summarizes the gain (loss) included in AFG’s Statement of Earnings for changes in the fair value of derivatives that do not qualify for hedge accounting for 2017, 2016 and 2015 (in millions):

Derivative	Statement of Earnings Line	2017			2016			2015
MBS with embedded derivatives	Realized gains (losses) on securities	$	(6	)	$	(9	)	$	(16	)
Public company warrants	Realized gains (losses) on securities	—			—			—
Fixed-indexed annuities (embedded derivative) (*)	Annuity benefits	(589		)	(211		)	(17		)
Equity index call options	Annuity benefits	494			141			(56		)
Reinsurance contracts (embedded derivative)	Net investment income	(2		)	(1		)	6
		$	(103	)	$	(80	)	$	(83	)

(*) The change in fair value of the embedded derivative includes losses related to unlocking of actuarial assumptions of $25 million in 2017 compared to $17 million in 2016 and $28 million in 2015.

Derivatives Designated and Qualifying as Cash Flow Hedges   As of December 31, 2017, AFG has entered into ten interest rate swaps that are designated and qualify as highly effective cash flow hedges to mitigate interest rate risk related to certain floating-rate securities included in AFG’s portfolio of fixed maturity securities. The purpose of each of these swaps is to effectively convert a portion of AFG’s floating-rate fixed maturity securities to fixed rates by offsetting the variability in cash flows attributable to changes in short-term LIBOR.

Under the terms of the swaps, AFG receives fixed-rate interest payments in exchange for variable interest payments based on short-term LIBOR. The notional amounts of the interest rate swaps generally decline over each swap’s respective life (the swaps expire between August 2019 and June 2030) in anticipation of the expected decline in AFG’s portfolio of fixed maturity securities with floating interest rates based on short-term LIBOR. The total outstanding notional amount of AFG’s interest rate swaps increased to $1.58 billion at December 31, 2017 compared to $1.08 billion at December 31, 2016, reflecting three new swaps with an aggregate notional amount at issuance of $663 million entered into in 2017, partially offset by the scheduled amortization discussed above. The fair value of the effective portion of the interest rate swaps in an asset position and included in other assets was less than $1 million at December 31, 2017 and $1 million at December 31, 2016. The fair value of the effective portion of interest rate swaps in a liability position and included in other liabilities was $31 million at December 31, 2017 and $22 million at December 31, 2016. The net unrealized gain or loss on cash flow hedges is included in AOCI, net of DPAC and deferred taxes. Amounts reclassified from AOCI (before DPAC and taxes) to net investment income were $6 million in 2017, $7 million in 2016 and $6 million in 2015. There was no ineffectiveness recorded in net earnings during these periods. A collateral receivable supporting these swaps of $70 million at December 31, 2017 and $60 million at December 31, 2016 is included in other assets in AFG’s Balance Sheet.

Derivative Designated and Qualifying as a Fair Value Hedge   In June 2015, AFG entered into an interest rate swap to mitigate the interest rate risk associated with its fixed-rate 9-7/8% Senior Notes due June 2019 by effectively converting the interest rate on those notes to a floating rate of three-month LIBOR plus 8.099%. In connection with redemption of the 9-7/8% Senior Notes in December 2017, AFG paid the counterparty $1 million to settle the interest rate swap.

Since the terms of the interest rate swap matched the terms of the hedged debt, changes in the fair value of the interest rate swap were offset by changes in the fair value of the hedged debt attributable to changes in interest rates. The fair value of the interest rate swap (asset of $1 million at December 31, 2016) and the offsetting adjustment to the carrying value of the 9-7/8% Senior Notes were both included in long-term debt on AFG’s Balance Sheet. Accordingly, the net impact on AFG’s earnings during the period that the swap was outstanding was that the interest expense associated with the hedged debt was effectively recorded at the floating rate. The net reduction in interest expense from the swap for 2017, 2016 and 2015 was $2 million, $3 million and $2 million, respectively.

F-30

AMERICAN FINANCIAL GROUP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

G.    Deferred Policy Acquisition Costs

A progression of deferred policy acquisition costs is presented below (in millions):

	P&C			Annuity and Run-off Long-term Care and Life
	Deferred			Deferred			Sales															Consolidated
	Costs			Costs			Inducements			PVFP			Subtotal			Unrealized (*)			Total			Total
Balance at December 31, 2014	$	221		$	925		$	132		$	74		$	1,131		$	(531	)	$	600		$	821
Additions	519			224			11			—			235			—			235			754
Amortization:
Periodic amortization	(511		)	(162		)	(26		)	(11		)	(199		)	—			(199		)	(710		)
Annuity unlocking	—			31			4			—			35			—			35			35
Included in realized gains	—			8			1			—			9			—			9			9
Sale of subsidiaries	—			(8		)	(3		)	(8		)	(19		)	—			(19		)	(19		)
Foreign currency translation	(3		)	—			—			—			—			—			—			(3		)
Change in unrealized	—			—			—			—			—			297			297			297
Balance at December 31, 2015	226			1,018			119			55			1,192			(234		)	958			1,184
Additions	535			230			9			—			239			—			239			774
Amortization:
Periodic amortization	(520		)	(169		)	(24		)	(9		)	(202		)	—			(202		)	(722		)
Annuity unlocking	—			25			4			—			29			—			29			29
Included in realized gains	—			6			2			—			8			—			8			8
Foreign currency translation	(3		)	—			—			—			—			—			—			(3		)
Change in unrealized	—			—			—			—			—			(31		)	(31		)	(31		)
Balance at December 31, 2016	238			1,110			110			46			1,266			(265		)	1,001			1,239
Additions	588			225			4			—			229			—			229			817
Amortization:
Periodic amortization	(556		)	(161		)	(19		)	(8		)	(188		)	—			(188		)	(744		)
Annuity unlocking	—			34			6			1			41			—			41			41
Included in realized gains	—			9			1			—			10			—			10			10
Foreign currency translation	—			—			—			—			—			—			—			—
Other	—			—			—			10			10			—			10			10
Change in unrealized	—			—			—			—			—			(157		)	(157		)	(157		)
Balance at December 31, 2017	$	270		$	1,217		$	102		$	49		$	1,368		$	(422	)	$	946		$	1,216

(*) Unrealized adjustments to DPAC includes net unrealized gains/losses on securities and net unrealized gains/losses on cash flow hedges.

The present value of future profits (“PVFP”) amounts in the table above are net of $141 million and $134 million of accumulated amortization at December 31, 2017 and 2016, respectively. During each of the next five years, the PVFP is expected to decrease at a rate of approximately one-eighth of the balance at the beginning of each respective year.

H.    Managed Investment Entities

AFG is the investment manager and its subsidiaries have investments ranging from 15.0% to 60.9% of the most subordinate debt tranche of fifteen collateralized loan obligation entities or “CLOs,” which are considered variable interest entities. AFG’s subsidiaries also own portions of the senior debt tranches of certain of these CLOs. Upon formation between 2004 and 2017, these entities issued securities in various senior and subordinate classes and invested the proceeds primarily in secured bank loans, which serve as collateral for the debt securities issued by each particular CLO. None of the collateral was purchased from AFG. AFG’s investments in the subordinate debt tranches of these entities receive residual income from the CLOs only after the CLOs pay expenses (including management fees to AFG) and interest on and returns of capital to senior levels of debt

F-31

AMERICAN FINANCIAL GROUP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

securities. There are no contractual requirements for AFG to provide additional funding for these entities. AFG has not provided and does not intend to provide any financial support to these entities.

AFG’s maximum exposure to economic loss on its CLOs is limited to its investment in the CLOs, which had an aggregate fair value of $215 million (including $130 million invested in the most subordinate tranches) at December 31, 2017, and $216 million at December 31, 2016.

In 2017, AFG formed two new CLOs, which issued an aggregate of $865 million face amount of liabilities (including $48 million face amount purchased by subsidiaries of AFG). During 2017, AFG subsidiaries also purchased $71 million face amount of senior debt and subordinate tranches of existing CLOs for $71 million. During 2017, AFG subsidiaries received $103 million in sale and redemption proceeds from its CLO investments. In 2016, AFG formed two new CLOs, which issued an aggregate of $866 million face amount of liabilities (including $64 million face amount purchased by subsidiaries of AFG). During 2016, AFG subsidiaries also purchased $24 million face amount of senior debt and subordinate tranches of existing CLOs for $17 million. During 2016, AFG subsidiaries also received $115 million in sale and redemption proceeds from its CLO investments. In 2015, AFG formed two new CLOs, which issued an aggregate of $869 million face amount of liabilities (including $81 million face amount purchased by subsidiaries of AFG). In 2017, two AFG CLOs were substantially liquidated, as permitted by the CLO indentures.

The revenues and expenses of the CLOs are separately identified in AFG’s Statement of Earnings, after the elimination of management fees and earnings attributable to shareholders of AFG as measured by the change in the fair value of AFG’s investments in the CLOs. Selected financial information related to the CLOs is shown below (in millions):

	Year ended December 31,
	2017			2016			2015
Investment in CLO tranches	$	215		$	216		$	266
Gains (losses) on change in fair value of assets/liabilities (a):
Assets	(8		)	131			(116		)
Liabilities	20			(116		)	82
Management fees paid to AFG	18			17			15
CLO earnings (losses) attributable to AFG Shareholders (b)	23			37			(6		)

(a) Included in revenues in AFG’s Statement of Earnings.

(b) Included in earnings before income taxes in AFG’s Statement of Earnings.

The aggregate unpaid principal balance of the CLOs’ fixed maturity investments exceeded the fair value of the investments by $55 million and $75 million at December 31, 2017 and 2016. The aggregate unpaid principal balance of the CLOs’ debt exceeded its carrying value by $118 million and $159 million at those dates. The CLO assets include loans with an aggregate fair value of $1 million at both December 31, 2017 and December 31, 2016, for which the CLOs are not accruing interest because the loans are in default (aggregate unpaid principal balance of $8 million and $10 million at those dates, respectively).

I.    Goodwill and Other Intangibles

Changes in the carrying value of goodwill during 2015, 2016 and 2017, by reporting segment, are presented in the following table (in millions):

	Property and Casualty		Annuity			Total
Balance at January 1, 2015	$	168	$	33		$	201
Sale of subsidiaries in 2015	—		(2		)	(2		)
Balance at December 31, 2015, December 31, 2016 and December 31, 2017	$	168	$	31		$	199

Goodwill decreased by $2 million in the fourth quarter of 2015 due to the sale of UTA and CGIC as discussed in Note B— “Acquisitions and Sale of Businesses.”

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

Included in other assets in AFG’s Balance Sheet is $26 million at December 31, 2017 and $34 million at December 31, 2016 of amortizable intangible assets related to property and casualty insurance acquisitions. These amounts are net of accumulated amortization of $30 million and $25 million, respectively. Amortization of intangibles was $8 million in each of 2017, 2016 and 2015. Future amortization of intangibles (weighted average amortization period of 3 years) is estimated to be $8 million per year in each of 2018 through 2020 and $2 million in 2021.

J.    Long-Term Debt

Long-term debt consisted of the following at December 31 (in millions):

	2017							2016
	Principal		Discount and Issue Costs			Carrying Value		Principal		Discount and Issue Costs			Carrying Value
Direct Senior Obligations of AFG:
4.50% Senior Notes due June 2047	$	590	$	(2	)	$	588	$	—	$	—		$	—
3.50% Senior Notes due August 2026	425		(5		)	420		300		(3		)	297
9-7/8% Senior Notes due June 2019	—		—			—		350		(1		)	349
6-3/8% Senior Notes due June 2042	—		—			—		230		(7		)	223
5-3/4% Senior Notes due August 2042	—		—			—		125		(4		)	121
Other	3		—			3		3		—			3
	1,018		(7		)	1,011		1,008		(15		)	993
Direct Subordinated Obligations of AFG:
6-1/4% Subordinated Debentures due September 2054	150		(5		)	145		150		(5		)	145
6% Subordinated Debentures due November 2055	150		(5		)	145		150		(5		)	145
	300		(10		)	290		300		(10		)	290
	$	1,318	$	(17	)	$	1,301	$	1,308	$	(25	)	$	1,283

At December 31, 2017, scheduled principal payments on debt for the subsequent five years and thereafter were as follows: 2018 — none; 2019 — none; 2020 — none; 2021 — none; 2022 — none and thereafter — $1.32 billion.

In June 2017, AFG issued $350 million in 4.50% Senior Notes due in 2047 at a price of 99.46%. The net proceeds of the offering were used to redeem AFG’s $230 million outstanding principal amount of 6-3/8% Senior Notes due June 2042 at par value and to redeem AFG’s $125 million outstanding principal amount of 5-3/4% Senior Notes due August 2042 at par value in June 2017 and August 2017, respectively.

In November 2017, AFG issued an additional $125 million of 3.50% Senior Notes due in 2026 at a price of 99.698% and $240 million of 4.50% Senior Notes due in 2047 at a price of 102.374%. The net proceeds of the offering were used to redeem AFG’s $350 million outstanding principal amount of 9-7/8% Senior Notes due in June 2019 for $388 million (including a make-whole premium of $38 million) in December 2017.

In August 2016, AFG issued $300 million in 3.50% Senior Notes due in 2026 at a price of 99.608%. The net proceeds of the offering were used to fund a portion of the November 2016 acquisition of the noncontrolling interest in NATL (discussed in Note B — “Acquisitions and Sale of Businesses”). At the acquisition date, the $18 million outstanding under NATL’s bank credit facility, including $6 million borrowed in September 2016, was repaid and the credit agreement was terminated.

In September 2015, AFG used cash on hand to redeem the $132 million in outstanding AFG 7% Senior Notes due September 2050 at par value. In November 2015, AFG issued $150 million in 6% Subordinated Debentures due in 2055. During 2015, subsidiaries of AFG repaid all of the outstanding notes secured by real estate.

To achieve a desired balance between fixed and variable rate debt, AFG entered into an interest rate swap in June 2015, which effectively converted its 9-7/8% Senior Notes to a floating rate of three-month LIBOR plus 8.099%. In December 2017, AFG settled the interest rate swap contemporaneously with the redemption of the 9-7/8% Senior Notes. At December 31, 2016, the fair value of the interest rate swap (asset of $1 million at that date) and the offsetting adjustment to the carrying value of the notes were both included in the carrying value of the 9-7/8% Senior Notes in the table above.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

AFG can borrow up to $500 million under its revolving credit facility, which expires in June 2021. Amounts borrowed under this agreement bear interest at rates ranging from 1.00% to 1.875% (currently 1.375%) over LIBOR based on AFG’s credit rating. No amounts were borrowed under this facility at December 31, 2017 or December 31, 2016.

Cash interest payments on long-term debt were $85 million in 2017, $75 million in 2016 and 2015. In 2017, 2016 and 2015, AFG received $2 million, $3 million and $2 million, respectively, in interest under the interest rate swap discussed above.

K.    Shareholders’ Equity

AFG is authorized to issue 12.5 million shares of Voting Preferred Stock and 12.5 million shares of Nonvoting Preferred Stock, each without par value.

Stock Incentive Plans   Under AFG’s stock incentive plans, employees of AFG and its subsidiaries are eligible to receive equity awards in the form of stock options, stock appreciation rights, restricted stock awards, restricted stock units and stock awards. At December 31, 2017, there were 8.0 million shares of AFG Common Stock reserved for issuance under AFG’s stock incentive plans.

The restricted Common Stock that AFG has granted generally vests over a three or four year period. Data relating to grants of restricted stock is presented below:

	Shares		Average Grant Date Fair Value
Outstanding at January 1, 2017	678,875		$	60.90
Granted	232,250		$	94.44
Vested	(145,473	)	$	48.76
Forfeited	(6,617	)	$	71.30
Outstanding at December 31, 2017	759,035		$	73.40

AFG issued 47,826 shares of Common Stock (fair value of $96.13 per share) in the first quarter of 2017 and 40,336 shares (fair value of $71.05 per share) in the first quarter of 2016 under its Equity Bonus Plan.

AFG did not grant any stock options in 2017 or 2016. Options granted in years prior to 2016 have an exercise price equal to the market price of AFG Common Stock at the date of grant. Options generally become exercisable at the rate of 20% per year commencing one year after grant and expire ten years after the date of grant.

Data for stock options issued under AFG’s stock incentive plans is presented below:

	Shares		Average Exercise Price		Average Remaining Contractual Term	Aggregate Intrinsic Value (in millions)
Outstanding at January 1, 2017	4,505,101		$	43.02
Exercised	(1,020,986	)	$	33.38
Forfeited/Cancelled	(16,775	)	$	55.82
Outstanding at December 31, 2017	3,467,340		$	45.80	4.9 years	$	218
Options exercisable at December 31, 2017	2,589,277		$	42.00	4.4 years	$	172

The total intrinsic value of options exercised during 2017, 2016 and 2015 was $65 million, $38 million and $52 million, respectively. During 2017, 2016 and 2015, AFG received $33 million, $32 million and $47 million, respectively, in cash from the exercise of stock options. The total tax benefit related to the exercises was $18 million, $11 million and $16 million (including $12 million credited directly to capital surplus in 2015) during those years, respectively.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

AFG used the Black-Scholes option pricing model to calculate the fair value of its option grants issued during 2015 (no options were granted in 2016 or 2017). The expected dividend yield is based on AFG’s current dividend rate. To determine expected volatility, AFG considers its daily historical volatility as well as implied volatility on traded options. The expected term was estimated based on historical exercise patterns and post vesting cancellations. The risk-free rate for periods associated with the expected term is based upon the U.S. Treasury yield curve in effect on the grant date.

	2015
Exercise price	$	63.15
Expected dividend yield	1.6		%
Expected volatility	25		%
Expected term (in years)	7.25
Risk-free rate	1.88		%
Grant date fair value	$	15.29

Total compensation expense related to stock incentive plans of AFG and its subsidiaries for 2017, 2016 and 2015 was $30 million, $28 million and $27 million, respectively. AFG’s provision for income tax includes tax benefits of $27 million in 2017, $19 million in 2016 and $8 million in 2015 related to AFG’s stock incentive plans. The tax benefit of $27 million in 2017 and $19 million in 2016 includes $17 million and $9 million, respectively, that under the previous guidance would have been recorded directly to capital surplus. At December 31, 2017, there was $7 million and $31 million of unrecognized compensation expense related to nonvested stock options and restricted stock awards, respectively. The nonvested stock options and restricted stock awards amounts are expected to be recognized over a weighted average of 1.7 years and 2.6 years, respectively.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

Accumulated Other Comprehensive Income, Net of Tax (“AOCI”)   Comprehensive income is defined as all changes in shareholders’ equity except those arising from transactions with shareholders. Comprehensive income includes net earnings and other comprehensive income, which consists primarily of changes in net unrealized gains or losses on available for sale securities. The progression of the components of accumulated other comprehensive income follows (in millions):

				Other Comprehensive Income
	AOCI Beginning Balance			Pretax			Tax			Net of tax			Attributable to noncontrolling interests			Attributable to shareholders			Other (c)			AOCI Ending Balance
Year ended December 31, 2017
Net unrealized gains on securities:
Unrealized holding gains on securities arising during the period				$	456		$	(159	)	$	297		$	—		$	297
Reclassification adjustment for realized (gains) losses included in net earnings (a)				(15		)	5			(10		)	—			(10		)
Total net unrealized gains on securities (b)	$	404		441			(154		)	287			—			287			$	149		$	840
Net unrealized losses on cash flow hedges	(7		)	(6		)	2			(4		)	—			(4		)	(2		)	(13		)
Foreign currency translation adjustments	(15		)	9			3			12			—			12			(3		)	(6		)
Pension and other postretirement plans adjustments	(7		)	1			—			1			—			1			(2		)	(8		)
Total	$	375		$	445		$	(149	)	$	296		$	—		$	296		$	142		$	813
Year ended December 31, 2016
Net unrealized gains on securities:
Unrealized holding gains on securities arising during the period				$	124		$	(44	)	$	80		$	(4	)	$	76
Reclassification adjustment for realized (gains) losses included in net earnings (a)				(19		)	7			(12		)	(1		)	(13		)
Total net unrealized gains on securities (b)	$	332		105			(37		)	68			(5		)	63			$	9		$	404
Net unrealized gains (losses) on cash flow hedges	1			(12		)	4			(8		)	—			(8		)	—			(7		)
Foreign currency translation adjustments	(22		)	6			1			7			—			7			—			(15		)
Pension and other postretirement plans adjustments	(7		)	—			—			—			—			—			—			(7		)
Total	$	304		$	99		$	(32	)	$	67		$	(5	)	$	62		$	9		$	375
Year ended December 31, 2015
Net unrealized gains (losses) on securities:
Unrealized holding losses on securities arising during the period				$	(625	)	$	219		$	(406	)	$	9		$	(397	)
Reclassification adjustment for realized (gains) losses included in net earnings (a)				14			(5		)	9			(1		)	8
Reclassification for unrealized gains of subsidiaries sold				(34		)	12			(22		)	—			(22		)
Total net unrealized gains (losses) on securities (b)	$	743		(645		)	226			(419		)	8			(411		)	$	—		$	332
Net unrealized gains on cash flow hedges	—			1			—			1			—			1			—			1
Foreign currency translation adjustments	(8		)	(9		)	(5		)	(14		)	—			(14		)	—			(22		)
Pension and other postretirement plans adjustments	(8		)	1			—			1			—			1			—			(7		)
Total	$	727		$	(652	)	$	221		$	(431	)	$	8		$	(423	)	$	—		$	304

(a)    The reclassification adjustment out of net unrealized gains on securities affected the following lines in AFG’s Statement of Earnings:

OCI component	Affected line in the statement of earnings
Pretax	Realized gains (losses) on securities
Tax	Provision for income taxes
Attributable to noncontrolling interests	Net earnings attributable to noncontrolling interests

(b) Includes net unrealized gains of $68 million at December 31, 2017 compared to net unrealized gains of $52 million and $51 million at December 31, 2016 and 2015, related to securities for which only the credit portion of an other-than-temporary impairment has been recorded in earnings.

(c) Other includes the December 2017 reclassification of $145 million stranded in AOCI from accounting for the Tax Cuts and Jobs Act of 2017 to retained earnings (see Note A — “Accounting Policies — Income Taxes”), and the impact on AOCI of the December 2017 sale of redeemable noncontrolling interests in Neon and the November 2016 acquisition of the noncontrolling interest in NATL (see Note B — “Acquisitions and Sale of Businesses”).

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

L.    Income Taxes

The following is a reconciliation of income taxes at the statutory rate of 35% to the provision for income taxes as shown in AFG’s Statement of Earnings (dollars in millions):

	2017					2016					2015
	Amount			% of EBT		Amount			% of EBT		Amount			% of EBT
Earnings before income taxes (“EBT”)	$	724				$	787				$	565
Income taxes at statutory rate	$	253		35	%	$	275		35	%	$	198		35	%
Effect of:
Tax exempt interest	(23		)	(3	%)	(24		)	(3	%)	(27		)	(5	%)
Dividend received deduction	(8		)	(1	%)	(7		)	(1	%)	(8		)	(1	%)
Stock-based compensation	(16		)	(2	%)	(9		)	(1	%)	1			—	%
Employee stock ownership plan dividend paid deduction	(5		)	(1	%)	(2		)	—	%	(1		)	—	%
Foreign operations	21			3	%	5			—	%	3			1	%
Change in valuation allowance (excluding change in tax rate)	(7		)	(1	%)	52			7	%	23			4	%
Subsidiaries not in AFG’s tax return	—			—	%	3			—	%	2			—	%
Neon restructuring	(56		)	(8	%)	(111		)	(14	%)	—			—	%
Change in U.S corporate tax rate	83			11	%	—			—	%	—			—	%
Acquisition of noncontrolling interest in NATL	—			—	%	(66		)	(8	%)	—			—	%
Other	5			1	%	3			—	%	4			1	%
Provision for income taxes as shown in the statement of earnings	$	247		34	%	$	119		15	%	$	195		35	%

The favorable impact of stock-based compensation on AFG’s effective tax rate in the year ended December 31, 2017 reflects the high volume of employee stock option exercises during that period and the increase in the market price of AFG Common Stock.

In January 2008, AFG paid $75 million in cash to acquire approximately 67% of Neon Underwriting Limited (“Neon”, formerly known as Marketform Group Limited), a United Kingdom-based Lloyd’s insurer. During 2012, AFG acquired the then-remaining shares of Neon that it did not already own for $17 million. AFG’s investment in Neon includes the cost of acquiring the company as well as additional capital provided to Neon since the date of acquisition.

In 2011, cumulative losses at Neon across multiple lines of business resulted in uncertainty concerning the realization of the deferred tax benefits associated with the losses. Consequently, AFG began maintaining a full valuation allowance against the deferred tax assets related to the Lloyd’s insurance business in 2011.

Approximately $14 million of the $21 million impact of “foreign operations” for 2017 in the table above relates to a reduction in the “foreign underwriting losses” deferred tax asset as a result of the sale of the noncontrolling interest in Neon. Since AFG maintains a full valuation allowance against the deferred tax assets related to Neon, this reduction in deferred tax assets was offset by a corresponding reduction in the valuation allowance and had no overall impact on AFG’s income tax expense or results of operations.

The changes in valuation allowance in the table above are primarily increases in the valuation allowance on tax benefits related to losses in the Neon Lloyd’s insurance business. The $61 million decrease in the valuation allowance related to the change in the U.S. corporate tax rate is included in “Change in U.S. corporate tax rate” in table above.

In connection with the reorganization of the Neon Lloyd’s business, in December 2016, AFG undertook a restructuring that included the liquidation for tax purposes of the foreign subsidiary that is the parent of the Neon Lloyd’s operations, resulting in a taxable loss for U.S. tax purposes. AFG reported a $111 million tax benefit associated with this loss in the fourth quarter of 2016. Approximately $29 million of the $111 million tax benefit recorded in 2016 reduced current taxes payable for 2016, while the remaining tax benefit was received in 2017 from the carry-back of the tax-basis capital loss to offset capital gains in prior years. An additional loss associated with the 2016 restructuring was deferred under U.S. tax laws, resulting in an unrecognized potential tax benefit of $48 million at December 31, 2016. The sale of the noncontrolling interest in Neon resulted

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

in the recognition of an additional tax benefit of $56 million in the fourth quarter of 2017, including the recognition of the deferred loss from the 2016 restructuring. Approximately $20 million of the $56 million tax benefit recorded in 2017 reduced current taxes payable for 2017, while the majority of the remaining tax benefit will be received in 2018 from the carry-back of the tax basis capital loss to offset capital gains in prior years.

The Tax Cuts and Jobs Act of 2017 (“TCJA”), which lowers the U.S corporate tax rate to 21% and makes other widespread changes to the U.S. tax code beginning in 2018, was enacted on December 22, 2017. Because the TCJA was enacted in December 2017, AFG recorded the $83 million decrease in its net deferred tax asset resulting from the changes in the tax code (primarily the lower corporate tax rate applicable to 2018 and future years) in the fourth quarter of 2017.

The TCJA is subject to further clarification and interpretation by the U.S. Treasury Department and the Internal Revenue Service. For example, the TCJA changes the way that companies calculate their insurance claims and reserves for tax purposes, including revaluing those tax basis liabilities as of January 1, 2018, based on a methodology and discount factors that have not been published. The resulting transitional deferred tax liability (taxes payable over eight years under the TCJA) and offsetting increase in AFG’s insurance claims and reserves deferred tax assets, were recorded at December 31, 2017 using reasonable estimates based on available information and should be considered provisional in accordance with Securities and Exchange Commission Staff Accounting Bulletin No. 118 (“SAB 118”). Because the established transition liability was completely offset by an increase in related deferred tax assets, any adjustment to the provisional amount will not impact AFG’s effective tax rate. In accordance with SAB 118, the insurance claims and reserves transitional deferred tax liability (and offsetting adjustment to the related deferred tax assets) and any other changes in deferred taxes resulting from clarification and interpretation of the TCJA provided during 2018 will be recorded in the period in which the guidance is published.

As discussed in Note B — “Acquisitions and Sale of Businesses,” AFG acquired the noncontrolling interest in NATL in November 2016. This transaction allowed NATL and its subsidiaries to become members of the AFG consolidated tax group, which resulted in a tax benefit of $66 million to AFG during the fourth quarter of 2016.

Excluding the tax benefit related to the Neon restructuring and the impact of the change in the U.S. corporate tax rate, AFG’s effective tax rate for the year ended December 31, 2017 was 31%. Excluding a $65 million charge related to the exit of certain lines of business within Neon and the tax benefits related to the acquisition of the noncontrolling interest in NATL and the Neon restructuring, AFG’s effective tax rate for the year ended December 31, 2016 was 35%.

AFG’s 2012 — 2017 tax years remain subject to examination by the IRS.

Total earnings before income taxes include losses subject to tax in foreign jurisdictions of $58 million in 2017, $160 million in 2016 and $66 million in 2015, primarily related to the Neon Lloyd’s operations.

The total income tax provision (credit) consists of (in millions):

	2017		2016			2015
Current taxes:
Federal	$	153	$	299		$	216
State	6		12			8
Deferred taxes:
Federal	5		(192		)	(29		)
Impact of change in U.S. corporate tax rate	83		—			—
Total Federal deferred taxes	88		(192		)	(29		)
Provision for income taxes	$	247	$	119		$	195

For income tax purposes, AFG and its subsidiaries had the following carryforwards available at December 31, 2017 (in millions):

	Expiring	Amount
Operating Loss – U.S.	2018 - 2022	$	130
Operating Loss – United Kingdom	indefinite	252		(*)
Capital Loss – U.S.	2022	109

(*) £186 million

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

Deferred income tax assets and liabilities reflect temporary differences between the carrying amounts of assets and liabilities recognized for financial reporting purposes and the amounts recognized for tax purposes. The significant components of deferred tax assets and liabilities included in AFG’s Balance Sheet at December 31 were as follows (in millions):

	2017									2016
	Excluding Unrealized Gains			Impact of Unrealized Gains			Total			Excluding Unrealized Gains			Impact of Unrealized Gains			Total
Deferred tax assets:
Federal net operating loss carryforwards	$	27		$	—		$	27		$	50		$	—		$	50
Foreign underwriting losses	80			—			80			120			—			120
Capital loss carryforwards	32			—			32			83			—			83
Insurance claims and reserves	665			29			694			774			27			801
Employee benefits	84			—			84			131			—			131
Other, net	48			(3		)	45			85			(5		)	80
Total deferred tax assets before valuation allowance	936			26			962			1,243			22			1,265
Valuation allowance against deferred tax assets	(109		)	—			(109		)	(173		)	—			(173		)
Total deferred tax assets	827			26			853			1,070			22			1,092
Deferred tax liabilities:
Investment securities	(1		)	(340		)	(341		)	29			(336		)	(307		)
Deferred policy acquisition costs	(293		)	91			(202		)	(448		)	96			(352		)
Insurance claims and reserves transition liability	(128		)	—			(128		)	—			—			—
Real estate, property and equipment	(35		)	—			(35		)	(45		)	—			(45		)
Total deferred tax liabilities	(457		)	(249		)	(706		)	(464		)	(240		)	(704		)
Net deferred tax asset (liability)	$	370		$	(223	)	$	147		$	606		$	(218	)	$	388

AFG’s net deferred tax asset at December 31, 2017 and 2016 is included in other assets in AFG’s Balance Sheet. The decrease in AFG’s net deferred tax asset at December 31, 2017 compared to December 31, 2016 reflects the impact of the change in the U.S. corporate tax rate, partially offset by higher pretax unrealized gains on securities.

The likelihood of realizing deferred tax assets is reviewed periodically; any adjustments required to the valuation allowance are made in the period during which developments requiring an adjustment become known.

“Foreign underwriting losses” in the table above include the net operating loss carryforward and other deferred tax assets related to the Neon Lloyd’s insurance business. Due to uncertainty concerning the realization of the deferred tax benefits associated with these losses, AFG maintains a full valuation allowance of $80 million against these deferred tax assets at December 31, 2017. In addition to the valuation allowance related to the Neon Lloyd’s insurance business, the gross deferred tax asset has also been reduced by a $27 million valuation allowance related to AFG’s net operating loss carryforwards (“NOL”) subject to the separate return limitation year (“SRLY”) tax rules. A SRLY NOL can be used only by the entity that created it and only in years that both it and the consolidated group have taxable income. Approximately $13 million of AFG’s SRLY NOLs expired unutilized at December 31, 2017. Since AFG maintains a full valuation allowance against its SRLY NOLs, the expiration of these loss carryforwards was offset by corresponding reduction in the valuation allowance and had no overall impact on AFG’s income tax expense or results of operations.

AFG increased its liability for uncertain tax positions by $1 million in 2015 due to uncertainty in state taxation of its surplus lines insurance subsidiaries. In 2017, this uncertainty was resolved, resulting in total tax payments of less than $1 million.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

A progression of the liability for uncertain tax positions, excluding interest and penalties, follows (in millions):

	2017			2016		2015
Balance at January 1	$	1		$	1	$	—
Additions for tax positions of prior years	—			—		1
Reductions for tax positions of prior years	—			—		—
Additions for tax positions of current year	—			—		—
Settlements	(1		)	—		—
Balance at December 31	$	—		$	1	$	1

The total unrecognized tax benefits and related interest and penalties that, if recognized, would impact the effective tax rate is less than $1 million at December 31, 2017 and December 31, 2016. AFG’s provision for income taxes included a benefit of less than $1 million in 2017 and an expense of less than $1 million in 2016 and 2015 of interest (net of federal benefit or expense). AFG’s liability for interest related to unrecognized tax benefits was less than $1 million at December 31, 2017 and December 31, 2016 (net of federal benefit). AFG’s provision for income taxes in 2017 and 2016 included penalties of less than $1 million; no penalties were recorded in 2015. AFG’s liability for penalties related to unrecognized tax benefits was less than $1 million at December 31, 2017 and December 31, 2016.

Cash payments for income taxes, net of refunds, were $194 million, $308 million and $234 million for 2017, 2016 and 2015, respectively.

M.     Contingencies

Establishing property and casualty insurance reserves for claims related to environmental exposures, asbestos and other mass tort claims is subject to uncertainties that are significantly greater than those presented by other types of claims. For this group of claims, traditional actuarial techniques that rely on historical loss development trends cannot be used and a range of reasonably possible losses cannot be estimated. In addition, accruals (included in other liabilities) have been recorded for various environmental and occupational injury and disease claims and other contingencies arising out of the railroad operations disposed of by American Premier’s predecessor, Penn Central Transportation Company (“PCTC”) and its subsidiaries, prior to its bankruptcy reorganization in 1978 and certain manufacturing operations disposed of by American Premier and Great American Financial Resources, Inc. (“GAFRI”).

AFG completed a comprehensive external study of its asbestos and environmental (“A&E”) exposures in the third quarter of 2017 with the aid of specialty actuarial, engineering and consulting firms and outside counsel. The study resulted in special A&E charges of $89 million for the property and casualty group and $24 million for the former railroad and manufacturing operations. AFG completed an in-depth internal review of its A&E exposures in the third quarter of 2016. The review resulted in special A&E charges of $36 million for the property and casualty group and $5 million for the former railroad and manufacturing operations. AFG completed a comprehensive external study of its A&E exposures in the third quarter of 2015 with the aid of specialty actuarial, engineering and consulting firms and outside counsel. The study resulted in special A&E charges of $67 million for the property and casualty group and $12 million for the former railroad and manufacturing operations.

The property and casualty group’s liability for A&E reserves was $528 million at December 31, 2017; related recoverables from reinsurers (net of allowances for doubtful accounts) at that date were $125 million.

At December 31, 2017, American Premier and its subsidiaries had liabilities for environmental and personal injury claims and other contingencies aggregating $81 million. The environmental claims consist of a number of proceedings and claims seeking to impose responsibility for hazardous waste remediation costs related to certain sites formerly owned or operated by the railroad and manufacturing operations. Remediation costs are difficult to estimate for a number of reasons, including the number and financial resources of other potentially responsible parties, the range of costs for remediation alternatives, changing technology and the time period over which these matters develop. The personal injury claims and other contingencies include pending and expected claims, primarily by former employees of PCTC, for injury or disease allegedly caused by exposure to excessive noise, asbestos or other substances in the workplace and other labor disputes.

At December 31, 2017, GAFRI had a liability of $8 million for environmental costs and certain other matters associated with the sales of its former manufacturing operations.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

See Note B — “Acquisitions and Sale of Businesses” for a discussion of the five-year capital maintenance agreement that AFG entered into in connection with obtaining regulatory approval for the sale of substantially all of its run-off long-term care insurance business in December 2015.

While management believes AFG has recorded adequate reserves for the items discussed above, the outcome is uncertain and could result in liabilities that may vary from amounts AFG has currently recorded. Such amounts could have a material effect on AFG’s future results of operations and financial condition.

In addition, AFG and its subsidiaries are involved in litigation from time to time, generally arising in the ordinary course of business. This litigation may include, but is not limited to, general commercial disputes, lawsuits brought by policyholders, employment matters, reinsurance collection matters and actions challenging certain business practices of insurance subsidiaries. None of these matters are expected to have a material adverse impact on AFG’s results of operations or financial condition.

N.     Quarterly Operating Results (Unaudited)

The operations of certain AFG business segments are seasonal in nature. While insurance premiums are recognized on a relatively level basis, claim losses related to adverse weather (snow, hail, hurricanes, severe storms, tornadoes, etc.) may be seasonal. The profitability of AFG’s crop insurance business is primarily recognized during the second half of the year as crop prices and yields are determined. Quarterly results necessarily rely heavily on estimates. These estimates and certain other factors, such as the discretionary sales of assets, cause the quarterly results not to be necessarily indicative of results for longer periods of time.

The following are quarterly results of consolidated operations for the two years ended December 31, 2017 (in millions, except per share amounts). Quarterly earnings per share do not add to year-to-date amounts due to changes in shares outstanding.

	1st Quarter		2nd Quarter		3rd Quarter		4th Quarter		Total Year
2017
Revenues	$	1,576	$	1,646	$	1,835	$	1,808	$	6,865
Net earnings, including noncontrolling interests	155		145		11		166		477
Net earnings attributable to shareholders	153		145		11		166		475
Earnings attributable to shareholders per Common Share:
Basic	$	1.76	$	1.64	$	0.13	$	1.88	$	5.40
Diluted	1.72		1.61		0.13		1.84		5.28
Average number of Common Shares:
Basic	87.2		87.8		88.1		88.2		87.8
Diluted	89.3		89.8		90.0		90.1		89.8
2016
Revenues	$	1,475	$	1,581	$	1,705	$	1,737	$	6,498
Net earnings, including noncontrolling interests	104		63		113		388		668
Net earnings attributable to shareholders	101		54		109		385		649
Earnings attributable to shareholders per Common Share:
Basic	$	1.16	$	0.63	$	1.25	$	4.43	$	7.47
Diluted	1.14		0.62		1.23		4.33		7.33
Average number of Common Shares:
Basic	86.9		86.8		86.9		86.9		86.9
Diluted	88.5		88.4		88.5		88.8		88.5

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

Pretax realized gains on subsidiaries and securities (including other-than-temporary impairments), favorable (adverse) prior year development of AFG’s liability for losses and loss adjustment expenses (“LAE”) and the impact of derivatives related to FIAs were as follows (in millions):

	1st Quarter			2nd Quarter			3rd Quarter			4th Quarter			Total Year
Realized Gains (Losses) on Securities and Subsidiaries
2017	$	3		$	8		$	(12	)	$	6		$	5
2016	(18		)	(14		)	2			51			21
Prior Year Development Favorable (Adverse)
2017	$	28		$	22		$	(52	)	$	66		$	64
2016	28			(28		)	(22		)	(10		)	(32		)
Impact of Derivatives related to Fixed-indexed Annuities
2017	$	(2	)	$	(16	)	$	(4	)	$	(11	)	$	(33	)
2016	(31		)	(26		)	1			29			(27		)

Adverse prior year development for the third quarters of 2017 and 2016 include pretax special charges of $89 million and $36 million, respectively, to strengthen property and casualty insurance A&E reserves. As a result of the Neon reinsurance to close agreement discussed in Note O — “Insurance,” Neon recorded $42 million in favorable development in the fourth quarter of 2017, of which $24 million related to its ongoing lines of business and $18 million related to its exited lines of business. During the second quarter of 2016, AFG recorded a pretax charge of $65 million related to Neon’s claims review of its exited lines of business, including $57 million to increase loss reserves primarily related to its medical malpractice and general liability classes.

Fixed-indexed annuities (“FIAs”) provide policyholders with a crediting rate tied, in part, to the performance of an existing stock market or other financial index. AFG attempts to mitigate the risk in the index-based component of these products through the purchase of call options on the appropriate index. AFG’s strategy is designed so that the change in the fair value of the call option assets will generally offset the economic change in the liabilities from the index participation. Both the index-based component of the annuities and the related call options are considered derivatives that must be marked-to-market through earnings each period. Fluctuations in interest rates and the stock market, among other factors, can cause volatility in the periodic measurement of fair value of the embedded derivative that management believes can be inconsistent with the long-term economics of these products. In the table above, the impact of changes in the fair value of the derivatives related to FIAs is presented net of an estimate of the related acceleration/deceleration of the amortization of deferred policy acquisition costs and deferred sales inducements.

AFG’s property and casualty operations recorded catastrophe losses totaling $140 million in 2017, including $107 million in the third quarter (primarily from Hurricanes Harvey, Irma and Maria and earthquakes in Mexico). Catastrophe losses for 2016 totaling $55 million were spread somewhat evenly across the four quarters.

Results include pretax gains (included in other income) of $13 million from the sale of a hotel in the first quarter of 2017 and$32 million from the sale of an apartment property in the second quarter of 2016.

Results for the third quarter of 2017 and 2016 include pretax special charges of $24 million and $5 million, respectively, to strengthen reserves for A&E exposures related to AFG’s former railroad and manufacturing operations.

In 2017, AFG recorded pretax losses on the retirement of debt of $7 million in the second quarter, $4 million in the third quarter and $40 million in the fourth quarter.

Net earnings in the fourth quarter of 2017 includes $56 million in tax benefits related to the Neon restructuring. Net earnings in the fourth quarter of 2016 includes $177 million in tax benefits related to the NATL merger and Neon restructuring. See Note L— “Income Taxes.”

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

O.     Insurance

Cash and securities owned by U.S.-based insurance subsidiaries, having a carrying value of approximately $1.08 billion at December 31, 2017, were on deposit as required by regulatory authorities. In addition, $205 million was on deposit in support of AFG’s underwriting activities at Lloyd’s. At December 31, 2017, AFG and its subsidiaries had $447 million in undrawn letters of credit (none of which was collateralized) supporting the underwriting capacity of its U.K.-based Lloyd’s insurer, Neon.

Property and Casualty Insurance Reserves Estimating the liability for unpaid losses and loss adjustment expenses (“LAE”) is inherently judgmental and is influenced by factors that are subject to significant variation. Determining the liability is a complex process incorporating input from many areas of the Company including actuarial, underwriting, pricing, claims and operations management.

The process used to determine the total reserve for liabilities involves estimating the ultimate incurred losses and LAE, adjusted for amounts already paid on the claims. The IBNR reserve is derived by first estimating the ultimate unpaid reserve liability and subtracting case reserves for loss and LAE.

In determining management’s best estimate of the ultimate liability, management (with the assistance of Company actuaries) considers items such as the effect of inflation on medical, hospitalization, material, repair and replacement costs, the nature and maturity of lines of insurance, general economic trends and the legal environment. In addition, historical trends adjusted for changes in underwriting standards, policy provisions, product mix and other factors are analyzed using actuarial reserve development techniques. Weighing all of the factors, the management team determines a single or “point” estimate that it records as its best estimate of the ultimate liability. Ranges of loss reserves are not developed by Company actuaries. This reserve analysis and review is completed each quarter and for almost every business within AFG’s property and casualty insurance sub-segments.

Each review includes in-depth analysis of several hundred subdivisions of the business, employing multiple actuarial techniques. For each subdivision, actuaries use informed, professional judgment to adjust these techniques as necessary to respond to specific conditions in the data or within the business.

Some of the standard actuarial methods employed for the quarterly reserve analysis may include (but may not be limited to):

• Case Incurred Development Method

• Paid Development Method

• Bornhuetter-Ferguson Method

• Incremental Paid LAE to Paid Loss Methods

Management believes that each method has particular strengths and weaknesses and that no single estimation method is most accurate in all situations. When applied to a particular group of claims, the relative strengths and weaknesses of each method can change over time based on the facts and circumstances. Ultimately, the estimation methods chosen are those which management believes produce the most reliable indication for the particular liabilities under review.

The period of time from the occurrence of a loss through the settlement of the liability is referred to as the “tail”. Generally, the same actuarial methods are considered for both short-tail and long-tail lines of business because most of them work properly for both. The methods are designed to incorporate the effects of the differing length of time to settle particular claims. For short-tail lines, management tends to give more weight to the Case Incurred and Paid Development methods, although the various methods tend to produce similar results. For long-tail lines, more judgment is involved, and more weight may be given to the Bornhuetter-Ferguson method. Liability claims for long-tail lines are more susceptible to litigation and can be significantly affected by changing contract interpretation and the legal environment. Therefore, the estimation of loss reserves for these classes is more complex and subject to a higher degree of variability.

The level of detail in which data is analyzed varies among the different lines of business. Data is generally analyzed by major product or by coverage within product, using countrywide data; however, in some situations, data may be reviewed by state or region. Appropriate segmentation of the data is determined based on data credibility, homogeneity of development patterns, mix of business, and other actuarial considerations.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

Supplementary statistical information is also reviewed to determine which methods are most appropriate to use or if adjustments are needed to particular methods. Such information includes:

• Open and closed claim counts

• Average case reserves and average incurred on open claims

• Closure rates and statistics related to closed and open claim percentages

• Average closed claim severity

• Ultimate claim severity

• Reported loss ratios

• Projected ultimate loss ratios

• Loss payment patterns

Within each business, results of individual methods are reviewed, supplementary statistical information is analyzed, and data from underwriting, operating and claim management are considered in deriving management’s best estimate of the ultimate liability. This estimate may be the result of one method, a weighted average of several methods, or a judgmental selection as the management team determines is appropriate.

The liability for losses and LAE for a very limited number of claims with long-term scheduled payments under certain workers’ compensation policies has been discounted at 4.5% at both December 31, 2017 and 2016, which represents an approximation of long-term investment yields. Because of the limited amount of claims involved, the net impact of discounting did not materially impact AFG’s total liability for unpaid losses and loss adjustment expenses (net reductions from discounting of $15 million and $16 million at December 31, 2017 and 2016, respectively).

The following table provides an analysis of changes in the liability for losses and loss adjustment expenses over the past three years (in millions):

	2017			2016			2015
Balance at beginning of period	$	8,563		$	8,127		$	7,872
Less reinsurance recoverables, net of allowance	2,302			2,201			2,227
Net liability at beginning of period	6,261			5,926			5,645
Provision for losses and LAE occurring in the current year	3,019			2,730			2,662
Net increase (decrease) in the provision for claims of prior years:
Special A&E charges	89			36			67
Neon exited lines charge	(18		)	57			—
Other	(135		)	(61		)	(34		)
Total losses and LAE incurred	2,955			2,762			2,695
Payments for losses and LAE of:
Current year	(942		)	(841		)	(828		)
Prior years	(1,586		)	(1,512		)	(1,575		)
Total payments	(2,528		)	(2,353		)	(2,403		)
Reserves of businesses disposed (*)	—			(40		)	—
Foreign currency translation and other	33			(34		)	(11		)
Net liability at end of period	6,721			6,261			5,926
Add back reinsurance recoverables, net of allowance	2,957			2,302			2,201
Gross unpaid losses and LAE included in the balance sheet	$	9,678		$	8,563		$	8,127

(*) Reflects the 2016 reinsurance to close transactions at Neon (discussed below).

The net decrease in the provision for claims of prior years in 2017 reflects (i) lower than expected losses in the crop and equine businesses and lower than expected claim severity in the property and inland marine and transportation businesses (all within the Property and transportation sub-segment), (ii) favorable reserve development of $18 million on Neon’s exited lines, as well as additional favorable development on ongoing lines of business within Neon, recorded in connection with the reinsurance to close agreement entered into in December 2017 for the 2015 and prior years of account, lower than anticipated claim severity in the workers’ compensation businesses and lower than expected losses in the executive liability business (all within the Specialty casualty sub-segment) and (iii) lower than anticipated claim severity in the fidelity business and lower than expected claim frequency and severity in the surety business (both within the Specialty financial sub-segment). This favorable development was partially offset by (i) the $89 million special charge to increase asbestos and environmental reserves, (ii) higher than expected claim frequency and severity in the ocean marine business (within the Property and transportation sub-segment), (iii) higher than anticipated claim severity in the targeted markets and general liability businesses and higher than anticipated

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

severity in New York contractor claims (all within the Specialty casualty sub-segment) and (iv) a charge to adjust to the deferred gain on the retroactive reinsurance transaction entered into in connection with the sale of businesses in 1998 (included in Other specialty sub-segment).

The net increase in the provision for claims of prior years in 2016 reflects (i) the $36 million special charge to increase asbestos and environmental reserves, (ii) reserve strengthening at National Interstate and higher than expected claim frequency in the ocean marine business (within the Property and transportation sub-segment), (iii) adverse reserve development at Neon, higher than anticipated severity in New York contractor claims, higher than anticipated claim frequency and severity in general liability insurance and higher than expected claim frequency and severity in the targeted markets business (within the Specialty casualty sub-segment) and (iv) the $57 million special charge to increase loss reserves related to Neon’s exit of its UK and international medical malpractice and general liability lines of business. This adverse development was partially offset by (i) lower than expected losses in the crop business and lower than expected claim severity in the property and inland marine and trucking businesses (all within the Property and transportation sub-segment), (ii) lower than anticipated claim frequency and severity in workers’ compensation business, lower than expected claim severity in directors and officers liability insurance and lower than expected claim frequency and severity in excess liability business (all within the Specialty casualty sub-segment) and (iii) lower than anticipated claim severity in the fidelity and crime business, lower than expected claim frequency and severity in the surety business and lower than anticipated claim frequency in the financial institutions business (within the Specialty financial sub-segment).

The net increase in the provision for claims of prior years in 2015 reflects (i) the $67 million special charge to increase asbestos and environmental reserves, (ii) higher than expected claim severity at National Interstate and higher than anticipated claim frequency in the ocean marine business (all within the Property and transportation sub-segment) and (iii) adverse reserve development at Neon (within the Specialty casualty sub-segment). This adverse development was partially offset by (i) lower than expected claim severity in the property and inland marine business, agricultural operations and a run-off book of homebuilders business (all within the Property and transportation sub-segment), (ii) lower than anticipated claim severity in workers’ compensation business, lower than anticipated claim severity and frequency in excess liability insurance and lower than expected claim severity in directors and officers liability insurance (all within the Specialty casualty sub-segment), and (iii) lower than anticipated claim frequency and severity in the surety business and products for financial institutions and lower than expected claim severity in the fidelity business and run-off collateral value insurance (all within the Specialty financial sub-segment).

In December 2017, the Neon Lloyd’s syndicate entered into a reinsurance to close transaction for the 2015 and prior years of account with StarStone Underwriting Limited, a subsidiary of Enstar Group Limited, which will be effective as of December 31, 2017. In the Lloyd’s market, a reinsurance to close transaction transfers the responsibility for discharging all of the liabilities that attach to the transferred year of account plus the right to any income due to the closing year of account in return for a premium. This transaction provides Neon with finality on its legacy business. As a result of the reinsurance to close agreement, Neon was able to better estimate its ultimate liability for the 2015 and prior years of account resulting in favorable development of $42 million, of which $24 million related to its ongoing lines of business (included in Specialty casualty) and $18 million related to its exited lines of business (discussed below and included in Neon exited lines charge). In November 2016, the Neon Lloyd’s syndicate completed a similar reinsurance to close transaction with StarStone, which covered liabilities relating to the syndicate’s 2007 and prior years of account. That transaction also included a quota share of the Italian public hospital business written in Neon’s 2008 year of account and represented Neon’s complete exit from the Italian public hospital medical malpractice business.

In May 2015, the FASB issued ASU 2015-09, Financial Services-Insurance: Disclosures about Short-Duration Contracts. The ASU requires insurance entities to disclose incurred and paid claims development information by accident year, net of reinsurance. All of AFG’s material short-duration insurance contracts are written in its property and casualty insurance segment. The development tables and the associated disclosures are aggregated in the following Specialty sub-segments: Property and transportation, Specialty casualty, Specialty financial and Other specialty. See Note C — “Segments of Operations” to the financial statements for a discussion of these sub-segments.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

A reconciliation of incurred and paid claims development information to the aggregate carrying amount of the liability for unpaid losses and LAE, with separate disclosure of reinsurance recoverables on unpaid claims is shown below (in millions):

	2017
Unpaid losses and allocated LAE, net of reinsurance:
Specialty
Property and transportation	$	1,069
Specialty casualty	3,630
Specialty financial	221
Other specialty	278
Total Specialty (excluding foreign reserves)	5,198
Other reserves
Reserves for foreign operations:
Neon Lloyd’s business	480
Other subsidiaries	269
A&E reserves	403
Unallocated LAE	326
Other	45
Total other reserves	1,523
Total reserves, net of reinsurance	6,721
Add back reinsurance recoverables, net of allowance	2,957
Gross unpaid losses and LAE included in the balance sheet	$	9,678

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

The following claims development tables and associated disclosures related to short-duration insurance contracts are prepared by sub-segment within the property and casualty insurance business for the most recent 10 accident years. AFG determines its claim counts at the claimant or policy feature level depending on the particular facts and circumstances of the underlying claim. While the methodology is generally consistent within each sub-segment, there are minor differences between and within the sub-segments. The methods used to summarize claim counts have not changed significantly over the time periods reported in the tables below.

Property and transportation
(Dollars in Millions)
	Incurred Claims and Allocated LAE, Net of Reinsurance																				As of December 31, 2017
	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)																				Total IBNR Plus Expected Development on Reported Claims		Cumulative Number of Reported Claims
Accident Year	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017
2008	$	923	$	871	$	852	$	853	$	856	$	854	$	855	$	856	$	854	$	854	$	1	157,164
2009			526		506		523		516		511		511		508		508		508		3		140,532
2010					702		662		668		676		679		679		683		680		6		140,634
2011							830		816		831		845		856		868		865		10		140,418
2012									890		884		897		909		922		918		19		146,630
2013											911		898		902		908		910		22		142,249
2014													868		852		841		843		38		136,882
2015															842		804		798		54		135,029
2016																	771		740		110		122,112
2017																			913		273		128,455
																	Total		$	8,029

	Cumulative Paid Claims and Allocated LAE, Net of Reinsurance
Accident Year	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)
	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017		% (a)
2008	$	352	$	706	$	761	$	799	$	824	$	835	$	846	$	846	$	847	$	848	99.3	%
2009			229		348		413		456		479		493		497		499		502		98.8	%
2010					328		505		556		618		649		660		665		669		98.4	%
2011							373		679		742		787		821		840		847		97.9	%
2012									582		725		793		841		868		883		96.2	%
2013											449		721		784		831		862		94.7	%
2014													337		646		711		765		90.7	%
2015															367		595		683		85.6	%
2016																	299		534		72.2	%
2017																			387		42.4	%
																	Total		$	6,980
									Unpaid losses and LAE — years 2008 through 2017										1,049
			Unpaid losses and LAE — 11th year and prior (excluding unallocated LAE)																20
			Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)																$	1,069

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance (Supplementary Information and Unaudited)
	Year 1		Year 2		Year 3		Year 4		Year 5		Year 6		Year 7		Year 8		Year 9		Year 10
Annual	45.9	%	29.9	%	8.4	%	6.3	%	3.7	%	1.9	%	0.9	%	0.3	%	0.4	%	0.1	%
Cumulative	45.9	%	75.8	%	84.2	%	90.5	%	94.2	%	96.1	%	97.0	%	97.3	%	97.7	%	97.8	%

(a) Represents the cumulative percentage paid of incurred claims and allocated LAE (net of reinsurance, as estimated at December 31, 2017).

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

Specialty casualty
(Dollars in Millions)
	Incurred Claims and Allocated LAE, Net of Reinsurance																				As of December 31, 2017
	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)																				Total IBNR Plus Expected Development on Reported Claims		Cumulative Number of Reported Claims
Accident Year	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017
2008	$	905	$	891	$	874	$	860	$	871	$	856	$	855	$	849	$	855	$	854	$	41	59,991
2009			864		867		845		826		816		811		812		807		803		48		53,192
2010					847		863		864		842		856		846		845		842		65		52,855
2011							831		831		819		828		814		808		806		73		50,851
2012									874		865		859		859		855		849		104		49,836
2013											938		921		915		910		913		132		49,412
2014													1,011		984		984		982		202		52,167
2015															1,057		1,023		1,022		268		52,846
2016																	1,105		1,098		426		50,652
2017																			1,186		715		46,399
																	Total		$	9,355

	Cumulative Paid Claims and Allocated LAE, Net of Reinsurance
Accident Year	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)
	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017		% (a)
2008	$	162	$	355	$	490	$	588	$	653	$	702	$	727	$	751	$	768	$	782	91.6	%
2009			160		366		494		575		636		673		698		713		722		89.9	%
2010					179		393		539		623		676		712		734		748		88.8	%
2011							165		369		506		595		643		674		694		86.1	%
2012									163		368		495		596		658		696		82.0	%
2013											171		377		530		638		698		76.5	%
2014													182		398		556		659		67.1	%
2015															170		398		560		54.8	%
2016																	181		404		36.8	%
2017																			192		16.2	%
																	Total		$	6,155
									Unpaid losses and LAE — years 2008 through 2017										3,200
			Unpaid losses and LAE — 11th year and prior (excluding unallocated LAE)																430
			Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)																$	3,630

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance (Supplementary Information and Unaudited)
	Year 1		Year 2		Year 3		Year 4		Year 5		Year 6		Year 7		Year 8		Year 9		Year 10
Annual	18.6	%	23.4	%	16.2	%	11.0	%	6.9	%	4.6	%	2.8	%	2.1	%	1.6	%	1.6	%
Cumulative	18.6	%	42.0	%	58.2	%	69.2	%	76.1	%	80.7	%	83.5	%	85.6	%	87.2	%	88.8	%

(a) Represents the cumulative percentage paid of incurred claims and allocated LAE (net of reinsurance, as estimated at December 31, 2017).

F-48

AMERICAN FINANCIAL GROUP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

Specialty financial
(Dollars in Millions)
	Incurred Claims and Allocated LAE, Net of Reinsurance																				As of December 31, 2017
	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)																				Total IBNR Plus Expected Development on Reported Claims		Cumulative Number of Reported Claims
Accident Year	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017
2008	$	190	$	207	$	212	$	209	$	203	$	199	$	198	$	197	$	198	$	199	$	1	27,292
2009			193		193		187		184		188		186		187		186		185		—		27,441
2010					139		146		133		133		135		133		130		128		2		21,929
2011							140		158		157		155		148		146		144		11		16,374
2012									164		163		151		139		137		135		11		21,050
2013											141		145		137		131		127		9		28,279
2014													146		157		156		154		16		28,983
2015															156		159		157		21		37,125
2016																	179		183		26		43,484
2017																			212		84		36,116
																	Total		$	1,624

	Cumulative Paid Claims and Allocated LAE, Net of Reinsurance
Accident Year	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)
	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017		% (a)
2008	$	103	$	153	$	185	$	189	$	189	$	191	$	193	$	194	$	194	$	197	99.0	%
2009			112		145		157		166		171		182		185		186		186		100.5	%
2010					61		93		104		122		133		131		128		127		99.2	%
2011							59		113		116		124		131		132		133		92.4	%
2012									71		104		109		117		121		126		93.3	%
2013											70		100		107		114		117		92.1	%
2014													62		108		125		128		83.1	%
2015															72		109		129		82.2	%
2016																	87		141		77.0	%
2017																			119		56.1	%
																	Total		$	1,403
									Unpaid losses and LAE — years 2008 through 2017										221
			Unpaid losses and LAE — 11th year and prior (excluding unallocated LAE)																—
			Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)																$	221

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance (Supplementary Information and Unaudited)
	Year 1		Year 2		Year 3		Year 4		Year 5		Year 6		Year 7		Year 8		Year 9		Year 10
Annual	49.8	%	26.3	%	8.3	%	5.7	%	3.6	%	2.0	%	0.2	%	0.1	%	—	%	1.5	%
Cumulative	49.8	%	76.1	%	84.4	%	90.1	%	93.7	%	95.7	%	95.9	%	96.0	%	96.0	%	97.5	%

(a) Represents the cumulative percentage paid of incurred claims and allocated LAE (net of reinsurance, as estimated at December 31, 2017).

F-49

AMERICAN FINANCIAL GROUP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

Other specialty
(Dollars in Millions)
	Incurred Claims and Allocated LAE, Net of Reinsurance																				As of December 31, 2017
	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)																				Total IBNR Plus Expected Development on Reported Claims		Cumulative Number of Reported Claims (a)
Accident Year	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017
2008	$	49	$	49	$	49	$	49	$	48	$	46	$	45	$	45	$	44	$	43	$	3	—
2009			41		41		41		40		37		37		36		38		33		7		—
2010					36		39		40		39		40		40		40		40		2		—
2011							39		43		42		43		43		44		44		4		—
2012									42		40		39		40		41		39		8		—
2013											46		47		46		47		50		5		—
2014													58		57		59		59		16		—
2015															59		60		63		20		—
2016																	61		61		31		—
2017																			63		47		—
																	Total		$	495

	Cumulative Paid Claims and Allocated LAE, Net of Reinsurance
Accident Year	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)
	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017		% (b)
2008	$	10	$	16	$	23	$	31	$	35	$	37	$	37	$	37	$	38	$	39	90.7	%
2009			8		12		15		19		22		22		24		26		25		75.8	%
2010					8		14		21		24		27		33		35		36		90.0	%
2011							12		20		25		28		34		36		37		84.1	%
2012									8		17		21		25		28		30		76.9	%
2013											7		16		22		34		37		74.0	%
2014													13		21		30		36		61.0	%
2015															10		26		31		49.2	%
2016																	9		19		31.1	%
2017																			10		15.9	%
																	Total		$	300
									Unpaid losses and LAE — years 2008 through 2017										195
			Unpaid losses and LAE — 11th year and prior (excluding unallocated LAE)																83
			Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)																$	278

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance (Supplementary Information and Unaudited)
	Year 1		Year 2		Year 3		Year 4		Year 5		Year 6		Year 7		Year 8		Year 9		Year 10
Annual	19.8	%	17.3	%	12.5	%	12.8	%	8.9	%	5.9	%	3.3	%	2.9	%	(0.4	%)	2.3	%
Cumulative	19.8	%	37.1	%	49.6	%	62.4	%	71.3	%	77.2	%	80.5	%	83.4	%	83.0	%	85.3	%

(a) The amounts shown in Other specialty represent business assumed by AFG’s internal reinsurance program from the operations that make up AFG’s other Specialty property and casualty insurance sub-segments. Accordingly, the liability for incurred claims and allocated LAE represents additional reserves held on claims counted in the tables provided for the other sub-segments (above).

(b) Represents the cumulative percentage paid of incurred claims and allocated LAE (net of reinsurance, as estimated at December 31, 2017).

F-50

AMERICAN FINANCIAL GROUP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

Total Specialty Group
(Dollars in Millions)
	Incurred Claims and Allocated LAE, Net of Reinsurance																				As of December 31, 2017
	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)																				Total IBNR Plus Expected Development on Reported Claims		Cumulative Number of Reported Claims
Accident Year	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017
2008	$	2,067	$	2,018	$	1,987	$	1,971	$	1,978	$	1,955	$	1,953	$	1,947	$	1,951	$	1,950	$	46	244,447
2009			1,624		1,607		1,596		1,566		1,552		1,545		1,543		1,539		1,529		58		221,165
2010					1,724		1,710		1,705		1,690		1,710		1,698		1,698		1,690		75		215,418
2011							1,840		1,848		1,849		1,871		1,861		1,866		1,859		98		207,643
2012									1,970		1,952		1,946		1,947		1,955		1,941		142		217,516
2013											2,036		2,011		2,000		1,996		2,000		168		219,940
2014													2,083		2,050		2,040		2,038		272		218,032
2015															2,114		2,046		2,040		363		225,000
2016																	2,116		2,082		593		216,248
2017																			2,374		1,119		210,970
																	Total		$	19,503

	Cumulative Paid Claims and Allocated LAE, Net of Reinsurance
Accident Year	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)
	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017		% (a)
2008	$	627	$	1,230	$	1,459	$	1,607	$	1,701	$	1,765	$	1,803	$	1,828	$	1,847	$	1,866	95.7	%
2009			509		871		1,079		1,216		1,308		1,370		1,404		1,424		1,435		93.9	%
2010					576		1,005		1,220		1,387		1,485		1,536		1,562		1,580		93.5	%
2011							609		1,181		1,389		1,534		1,629		1,682		1,711		92.0	%
2012									824		1,214		1,418		1,579		1,675		1,735		89.4	%
2013											697		1,214		1,443		1,617		1,714		85.7	%
2014													594		1,173		1,422		1,588		77.9	%
2015															619		1,128		1,403		68.8	%
2016																	576		1,098		52.7	%
2017																			708		29.8	%
																	Total		$	14,838
									Unpaid losses and LAE — years 2008 through 2017										4,665
			Unpaid losses and LAE — 11th year and prior (excluding unallocated LAE)																533
			Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)																$	5,198

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance (Supplementary Information and Unaudited)
	Year 1		Year 2		Year 3		Year 4		Year 5		Year 6		Year 7		Year 8		Year 9		Year 10
Annual	32.7	%	26.1	%	12.1	%	8.5	%	5.3	%	3.3	%	1.8	%	1.2	%	0.8	%	1.0	%
Cumulative	32.7	%	58.8	%	70.9	%	79.4	%	84.7	%	88.0	%	89.8	%	91.0	%	91.8	%	92.8	%

(a) Represents the cumulative percentage paid of incurred claims and allocated LAE (net of reinsurance, as estimated at December 31, 2017).

Closed Block of Long-Term Care Insurance Following the completion of the sale of substantially all of its run-off long-term care insurance business in December 2015, AFG’s remaining long-term care insurance reserves were $39 million at December 31, 2017 and $37 million at December 31, 2016, net of reinsurance recoverables and excluding the impact of unrealized gains on securities. AFG’s remaining outstanding long-term care policies have level premiums and are guaranteed renewable. Premium rates can potentially be increased in reaction to adverse experience; however, any rate increases would require regulatory approval.

F-51

AMERICAN FINANCIAL GROUP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

FHLB Funding Agreements   Great American Life Insurance Company (“GALIC”), a wholly-owned annuity subsidiary, is a member of the Federal Home Loan Bank of Cincinnati (“FHLB”). The FHLB makes advances and provides other banking services to member institutions. Members are required to purchase stock in the FHLB in addition to maintaining collateral deposits that back any funds advanced. GALIC’s $44 million investment in FHLB capital stock at December 31, 2017, is included in other investments at cost. Membership in the FHLB provides the annuity operations with an additional source of liquidity. These advances further the FHLB’s mission of improving access to housing by increasing liquidity in the residential mortgage-backed securities market. In the fourth quarter of 2017, GALIC refinanced the terms on advances totaling $831 million, which lowered the spread over LIBOR. In the fourth quarter of 2017, GALIC also repaid $64 million to the FHLB, decreasing the total amount advanced to $871 million (included in annuity benefits accumulated) at December 31, 2017. Interest rates under the various funding agreements on the advances range from 0.03% to 0.35% over LIBOR (average rate of 1.75% at December 31, 2017). While these advances must be repaid between 2018 and 2020 ($285 million in 2018 and $586 million in 2020), GALIC has the option to prepay all or a portion of the advances. GALIC has invested the proceeds from the advances in fixed maturity securities with similar expected lives as the advances for the purpose of earning a spread over the interest payments due to the FHLB. The advances on these agreements are collateralized by fixed maturity investments, which have a total fair value of $1.04 billion (included in available for sale fixed maturity securities) at December 31, 2017. Interest credited on the funding agreements, which is included in annuity benefits, was $14 million in 2017, $8 million in 2016 and $3 million in 2015.

Statutory Information   AFG’s U.S.-based insurance subsidiaries are required to file financial statements with state insurance regulatory authorities prepared on an accounting basis prescribed or permitted by such authorities (statutory basis). Net earnings and capital and surplus on a statutory basis for the insurance subsidiaries were as follows (in millions):

	Net Earnings						Capital and Surplus
	2017		2016		2015		2017		2016
Property and casualty companies	$	484	$	461	$	408	$	2,729	$	2,939
Life insurance companies	286		167		399		2,132		1,976

The National Association of Insurance Commissioners’ (“NAIC”) model law for risk based capital (“RBC”) applies to both life and property and casualty insurance companies. RBC formulas determine the amount of capital that an insurance company needs so that it has an acceptable expectation of not becoming financially impaired. Companies below specific trigger points or ratios are subject to regulatory action. At December 31, 2017 and 2016, the capital ratios of all AFG insurance companies substantially exceeded the RBC requirements. AFG’s insurance companies did not use any prescribed or permitted statutory accounting practices that differed from the NAIC statutory accounting practices at December 31, 2017 or 2016.

Payments of dividends by AFG’s insurance companies are subject to various state laws that limit the amount of dividends that can be paid. Under applicable restrictions, the maximum amount of dividends available to AFG in 2018 from its insurance subsidiaries without seeking regulatory approval is $826 million. Additional amounts of dividends require regulatory approval.

AFG paid common stock dividends to shareholders totaling $421 million, $187 million and $178 million in 2017, 2016 and 2015, respectively. Currently, there are no regulatory restrictions on AFG’s retained earnings or net earnings that materially impact its ability to pay dividends. Based on shareholders’ equity at December 31, 2017, AFG could pay dividends in excess of $1 billion without violating its most restrictive debt covenant. However, the payment of future dividends will be at the discretion of AFG’s Board of Directors and will be dependent on many factors including AFG’s financial condition and results of operations, the capital requirements of its insurance subsidiaries, and rating agency commitments.

F-52

AMERICAN FINANCIAL GROUP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

Reinsurance In the normal course of business, AFG’s insurance subsidiaries cede reinsurance to other companies to diversify risk and limit maximum loss arising from large claims. However, AFG remains liable to its insureds regardless of whether a reinsurer is able to meet its obligations. The following table shows (in millions) (i) amounts deducted from property and casualty written and earned premiums in connection with reinsurance ceded, (ii) written and earned premiums included in income for reinsurance assumed and (iii) reinsurance recoveries, which represent ceded losses and loss adjustment expenses.

	2017			2016			2015
Direct premiums written	$	6,310		$	5,858		$	5,713
Reinsurance assumed	192			123			119
Reinsurance ceded	(1,751		)	(1,595		)	(1,505		)
Net written premiums	$	4,751		$	4,386		$	4,327
Direct premiums earned	$	6,112		$	5,745		$	5,613
Reinsurance assumed	157			118			105
Reinsurance ceded	(1,690		)	(1,535		)	(1,494		)
Net earned premiums	$	4,579		$	4,328		$	4,224
Reinsurance recoveries	$	1,379		$	810		$	936

In June 2017, AFG’s property and casualty insurance subsidiaries entered into a reinsurance agreement to obtain supplemental catastrophe protection through a catastrophe bond structure with Riverfront Re Ltd. (“Riverfront”). The reinsurance agreement provides supplemental reinsurance coverage up to 95% of $200 million (fully collateralized) for catastrophe losses in excess of $100 million (per occurrence and annual aggregate) occurring between June 1, 2017 and December 31, 2020. In connection with the reinsurance agreement, Riverfront issued notes to unrelated investors for the full amount of coverage provided under the reinsurance agreement. Through December 31, 2017, AFG’s incurred catastrophe losses have not reached the level of attachment for the catastrophe bond structure. Riverfront is a variable interest entity in which AFG does not have a variable interest because the variability in Riverfront’s results will be absorbed entirely by the investors in Riverfront. Accordingly, Riverfront is not consolidated in AFG’s financial statements and the reinsurance agreement is accounted for as ceded reinsurance. AFG’s cost for this coverage is approximately $11 million per year.

AFG’s property and casualty insurance operations entered into a similar reinsurance agreement in March 2014 to obtain additional catastrophe protection through a catastrophe bond structure with Riverfront, which provided supplemental reinsurance coverage for catastrophe losses occurring between April 1, 2014 and January 6, 2017.

AFG has reinsured approximately $8.32 billion of its $12.05 billion in face amount of life insurance at December 31, 2017 compared to $10.22 billion of its $13.49 billion in face amount of life insurance at December 31, 2016. Life written premiums ceded were $28 million, $31 million and $40 million for 2017, 2016 and 2015, respectively. Reinsurance recoveries on ceded life policies were $35 million, $41 million and $50 million for 2017, 2016 and 2015, respectively.

Fixed Annuities   For certain products, the liability for “annuity benefits accumulated” includes reserves for excess benefits expected to be paid on future deaths and annuitizations (“EDAR”), guaranteed withdrawal benefits and accrued persistency and premium bonuses. The liabilities included in AFG’s Balance Sheet for these benefits, excluding the impact of unrealized gains on securities, were as follows at December 31 (in millions):

	2017		2016
Expected death and annuitization	$	228	$	223
Guaranteed withdrawal benefits	357		278
Accrued persistency and premium bonuses	3		6

Variable Annuities   At December 31, 2017, the aggregate guaranteed minimum death benefit value (assuming every variable annuity policyholder died on that date) on AFG’s variable annuity policies exceeded the fair value of the underlying variable annuities by $15 million, compared to $20 million at December 31, 2016. Death benefits paid in excess of the variable annuity account balances were less than $1 million in each of the last three years.

F-53

AMERICAN FINANCIAL GROUP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — CONTINUED

P.     Additional Information

Allowance for Uncollectible Reinsurance   AFG’s aggregate allowance for uncollectible reinsurance recoverables was $20 million at December 31, 2017 and $22 million at December 31, 2016. AFG reviews the allowance quarterly and adjusts it as necessary to reflect changes in estimates of uncollectible balances. AFG recorded net expense reductions against the allowance of less than $1 million in both 2017 and 2016 and $3 million in 2015. In 2017, the allowance was reduced by reinsurance recoverable write-offs of $2 million.

Operating Leases   Total rental expense for various leases of office space and equipment was $69 million in 2017, $67 million in 2016 and $70 million in 2015. Future minimum rentals, related principally to office space, required under operating leases having initial or remaining noncancelable lease terms in excess of one year at December 31, 2017, were as follows: 2018 – $63 million; 2019 – $57 million; 2020 – $50 million; 2021 – $42 million; 2022 – $34 million; and $100 million thereafter.

Financial Instruments — Unfunded Commitments On occasion, AFG and its subsidiaries have entered into financial instrument transactions that may present off-balance-sheet risks of both a credit and market risk nature. These transactions include commitments to fund loans, loan guarantees and commitments to purchase and sell securities or loans. At December 31, 2017, AFG and its subsidiaries had commitments to fund credit facilities and contribute capital to limited partnerships and limited liability corporations of approximately $484 million.

Benefit Plans   AFG expensed approximately $45 million in 2017, $43 million in 2016 and $34 million in 2015 for its retirement and employee savings plans.

F-54

PART III

The information required by the following Items will be included in AFG’s definitive Proxy Statement for the 2018 Annual Meeting of Shareholders, which will be filed with the Securities and Exchange Commission within 120 days after the end of the Registrant’s fiscal year and is incorporated herein by reference.

ITEM 10	Directors, Executive Officers of the Registrant and Corporate Governance
ITEM 11	Executive Compensation
ITEM 12	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters
ITEM 13	Certain Relationships and Related Transactions, and Director Independence
ITEM 14	Principal Accountant Fees and Services

PART IV

ITEM 15

Exhibits and Financial Statement Schedules

(a)	Documents filed as part of this Report:
	1.	Financial Statements are included in Part II, Item 8.
	2.	Financial Statement Schedules:
		A.	Selected Quarterly Financial Data is included in Note N to the Consolidated Financial Statements.
		B.	Schedules filed herewith for 2017, 2016 and 2015:
				Page
			II — Condensed Financial Information of Registrant	S-3
			III — Supplementary Insurance Information	S-5
			All other schedules for which provisions are made in the applicable regulation of the Securities and Exchange Commission have been omitted as they are not applicable, not required, or the information required thereby is set forth in the Financial Statements or the notes thereto.
	3.	Exhibits — See Exhibit Index on the next page.

S-1

INDEX TO EXHIBITS

AMERICAN FINANCIAL GROUP, INC.

Number	Exhibit Description
2	Agreement and Plan of Merger dated July 25, 2016 by and among Great American Insurance Company and National Interstate Corporation, filed as Exhibit 2.1 to AFG’s Form 8-K on July 25, 2016.		(*)
3(a)	Amended and Restated Articles of Incorporation.
3(b)	Amended and Restated Code of Regulations, filed as Exhibit 3 to AFG’s Form 8-K filed on August 16, 2012.		(*)
4	Instruments defining the rights of security holders.	Registrant has no outstanding debt issues exceeding 10% of the assets of Registrant and consolidated subsidiaries.
	Material Contracts:
10(a)	Amended and Restated Non-Employee Directors Compensation Plan, filed as Exhibit 10 to the Form S-8 Registration Statement (File No. 333-181913) filed by AFG on November 13, 2012.		(*)
10(b)	Amended and Restated Deferred Compensation Plan, filed as Exhibit 10(b) to AFG’s Form 10-K for 2008.		(*)
10(c)	2011 Equity Bonus Plan (formerly known as the 2011 Co-CEO Equity Bonus Plan), filed as Exhibit 10 to the Form S-8 Registration Statement (File No. 333-184915) filed by AFG on November 13, 2012.		(*)
10(d)	Annual Senior Executive Bonus Plan.
10(e)	Amended and restated Nonqualified Auxiliary RASP, filed as Exhibit 10(f) to AFG’s Form 10-K for 2008.		(*)
10(f)	2005 Stock Incentive Plan Exhibit 10 to the Form S-8 Registration Statement (File No. 333-184914) filed by AFG on November 13, 2012.		(*)
10(g)	2015 Stock Incentive Plan filed as Exhibit 10(g) to AFG’s Form 10-K for 2015.		(*)
10(h)	Senior Executive Long Term Incentive Compensation Plan, filed as Appendix A to AFG’s Proxy Statement filed on April 1, 2016.		(*)
10(i)	Credit Agreement dated June 2, 2016, among American Financial Group, Inc., Bank of America, N.A., as Administrative Agent, and several lenders, filed as Exhibit 10.1 to AFG’s Form 8-K filed on June 2, 2016.		(*)
12	Computation of ratios of earnings to fixed charges.
21	Subsidiaries of the Registrant.
23	Consent of independent registered public accounting firm.
31(a)	Certification of Co-Chief Executive Officer pursuant to Section 302(a) of the Sarbanes-Oxley Act of 2002.
31(b)	Certification of Co-Chief Executive Officer pursuant to Section 302(a) of the Sarbanes-Oxley Act of 2002.
31(c)	Certification of Chief Financial Officer pursuant to Section 302(a) of the Sarbanes-Oxley Act of 2002.
32	Certification of Co-Chief Executive Officers and Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101	The following financial information from American Financial Group’s Form 10-K for the year ended December 31, 2017, formatted in XBRL (Extensible Business Reporting Language):
	(i)     Consolidated Balance Sheet
	(ii)    Consolidated Statement of Earnings
	(iii)   Consolidated Statement of Comprehensive Income
	(iv)   Consolidated Statement of Changes in Equity
	(v)    Consolidated Statement of Cash Flows
	(vi)   Notes to Consolidated Financial Statements
	(vii)  Financial Statement Schedules
(*) Incorporated herein by reference.

S-2

AMERICAN FINANCIAL GROUP, INC. — PARENT ONLY

SCHEDULE II — CONDENSED FINANCIAL INFORMATION OF REGISTRANT

(In Millions)

Condensed Balance Sheet

	December 31,
	2017		2016
Assets:
Cash and cash equivalents	$	299	$	197
Investment in securities	70		63
Investment in subsidiaries (a)	6,310		5,989
Other investments	2		2
Other assets	141		136
Total assets	$	6,822	$	6,387
Liabilities and Equity:
Long-term debt	$	1,301	$	1,283
Other liabilities	191		188
Shareholders’ equity	5,330		4,916
Total liabilities and equity	$	6,822	$	6,387

Condensed Statement of Earnings

	Year ended December 31,
	2017		2016		2015
Revenues:
Dividends from subsidiaries	$	681	$	643	$	311
Equity in undistributed earnings of subsidiaries	264		286		386
Investment and other income	13		7		4
Total revenues	958		936		701
Costs and Expenses:
Interest charges on intercompany borrowings	9		9		9
Interest charges on other borrowings	85		77		73
Other expenses	142		82		72
Total costs and expenses	236		168		154
Earnings before income taxes	722		768		547
Provision for income taxes	247		119		195
Net Earnings Attributable to Shareholders	$	475	$	649	$	352

Condensed Statement of Comprehensive Income

Net earnings attributable to shareholders	$	475	$	649	$	352
Other comprehensive income (loss), net of tax	296		62		(423		)
Total comprehensive income (loss), net of tax	$	771	$	711	$	(71	)

________________________

(a) Investment in subsidiaries includes intercompany receivables and payables.

S-3

AMERICAN FINANCIAL GROUP, INC. — PARENT ONLY

SCHEDULE II — CONDENSED FINANCIAL INFORMATION OF REGISTRANT — CONTINUED

(In Millions)

Condensed Statement of Cash Flows

	Year ended December 31,
	2017			2016			2015
Operating Activities:
Net earnings attributable to shareholders	$	475		$	649		$	352
Adjustments:
Equity in net earnings of subsidiaries	(575		)	(638		)	(451		)
Dividends from subsidiaries	580			611			280
Other operating activities, net	98			(67		)	(19		)
Net cash provided by operating activities	578			555			162
Investing Activities:
Capital contributions to subsidiaries	(93		)	(560		)	(27		)
Returns of capital from subsidiaries	30			—			1
Purchases of investments, property and equipment	(2		)	(1		)	(10		)
Proceeds from maturities and redemptions of investments	2			1			—
Proceeds from sales of investments, property and equipment	—			—			3
Net cash used in investing activities	(63		)	(560		)	(33		)
Financing Activities:
Additional long-term borrowings	712			296			145
Reductions of long-term debt	(745		)	—			(132		)
Issuances of Common Stock	37			35			57
Repurchases of Common Stock	—			(133		)	(126		)
Cash dividends paid on Common Stock	(417		)	(185		)	(176		)
Net cash provided by (used in) financing activities	(413		)	13			(232		)
Net Change in Cash and Cash Equivalents	102			8			(103		)
Cash and cash equivalents at beginning of year	197			189			292
Cash and cash equivalents at end of year	$	299		$	197		$	189

S-4

AMERICAN FINANCIAL GROUP, INC. AND SUBSIDIARIES

SCHEDULE III — SUPPLEMENTARY INSURANCE INFORMATION

THREE YEARS ENDED DECEMBER 31, 2017

(IN MILLIONS)

Segment	Deferred policy acquisition costs		Reserves for future policy benefits, claims and unpaid losses and LAE		Unearned premiums		Net earned premiums		Net investment income			Benefits, claims, losses and settlement expenses		Amortization of deferred policy acquisition costs		Other operating expenses		Net written premiums (excluding life)
2017
Property and casualty insurance	$	270	$	9,678	$	2,410	$	4,579	$	362		$	2,955	$	556	$	867	$	4,751
Annuity	920		33,316		—		—		1,458			892		130		159		—
Run-off long-term care and life	26		658		—		22		20			26		4		11		3
Other	—		—		—		—		(9		)	—		—		541		—
Total	$	1,216	$	43,652	$	2,410	$	4,601	$	1,831		$	3,873	$	690	$	1,578	$	4,754
2016
Property and casualty insurance	$	238	$	8,563	$	2,171	$	4,328	$	350		$	2,762	$	520	$	870	$	4,386
Annuity	981		29,907		—		—		1,356			800		149		142		—
Run-off long-term care and life	20		691		—		24		21			33		4		10		3
Other	—		—		—		—		(31		)	—		—		421		—
Total	$	1,239	$	39,161	$	2,171	$	4,352	$	1,696		$	3,595	$	673	$	1,443	$	4,389
2015
Property and casualty insurance	$	226	$	8,127	$	2,060	$	4,224	$	319		$	2,695	$	511	$	839	$	4,327
Annuity	934		26,622		—		—		1,224			732		136		123		—
Run-off long-term care and life	24		705		—		104		80			131		6		37		73
Other	—		—		—		—		10			—		—		370		—
Total	$	1,184	$	35,454	$	2,060	$	4,328	$	1,633		$	3,558	$	653	$	1,369	$	4,400

S-5

Signatures

Pursuant to the requirements of Section 13 or 15(d) 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.

	American Financial Group, Inc.
February 23, 2018	By:	/s/ Joseph E. (Jeff) Consolino
		Joseph E. (Jeff) Consolino
		Executive Vice President and Chief Financial Officer

__________________________________________________________________________________________

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated:

Signature	Capacity	Date
/s/ Carl H. Lindner III	Co-Chief Executive Officer and Director	February 23, 2018
Carl H. Lindner III	(Principal Executive Officer)
/s/ S. Craig Lindner	Co-Chief Executive Officer and Director	February 23, 2018
S. Craig Lindner	(Principal Executive Officer)
/s/ Joseph E. (Jeff) Consolino	Executive Vice President, Chief Financial Officer and Director	February 23, 2018
Joseph E. (Jeff) Consolino	(Principal Financial and Accounting Officer)
/s/ Kenneth C. Ambrecht	Director	February 23, 2018
Kenneth C. Ambrecht
/s/ John B. Berding	Director	February 23, 2018
John B. Berding
/s/ Virginia (Gina) C. Drosos	Director*	February 23, 2018
Virginia (Gina) C. Drosos
/s/ James E. Evans	Director	February 23, 2018
James E. Evans
/s/ Terry S. Jacobs	Director*	February 23, 2018
Terry S. Jacobs
/s/ Gregory G. Joseph	Director*	February 23, 2018
Gregory G. Joseph
/s/ William W. Verity	Director	February 23, 2018
William W. Verity
/s/ John I. Von Lehman	Director*	February 23, 2018
John I. Von Lehman
* Member of the Audit Committee

S-6

EX-3.A

Exhibit 3(a)

AMENDED AND RESTATED

ARTICLES OF INCORPORATION

OF

AMERICAN FINANCIAL GROUP, INC.

FIRST. The name of the corporation is AMERICAN FINANCIAL GROUP HOLDINGS, INC. (the "Corporation").

SECOND. The place in the State of Ohio where the Corporation's principal office is to be located is the City of Cincinnati in Hamilton County, Ohio.

THIRD. The purpose for which the Corporation is organized shall be to engage in any lawful act or activity for which corporations may be formed under the Ohio General Corporation Law, Ohio Revised Code §§1701.01 etseq..

FOURTH. The aggregate number of shares of stock which the Corporation shall have authority to issue is Two Hundred Twenty Five Million (225,000,000) shares, which shall be divided into two classes, consisting of:

(a)    Twenty Five Million (25,000,000) shares of preferred stock ("Preferred Stock") without par value; and,

(b)    Two Hundred Million (200,000,000) shares of common stock ("Common Stock") without par value.

PART ONE:  PREFERRED STOCK

(a)Except as otherwise provided by this Article FOURTH or by the amendment or amendments adopted by the Board of Directors providing for the issue of any series of Preferred Stock, the Preferred Stock may be issued at any time or from time to time in any amount, not exceeding in the aggregate, including all shares of any and all series thereof theretofore issued, the Twenty Five Million (25,000,000) shares of Preferred Stock hereinabove authorized, as Preferred Stock of one or more series, as hereinafter provided, and for such lawful consideration as shall be fixed from time to time by the Board of Directors.

Twelve Million Five Hundred Thousand (12,500,000) shares of Preferred Stock shall have voting rights as provided in clause (b) of this Part One of Article FOURTH (collectively, "Voting Preferred Stock").

Twelve Million Five Hundred Thousand (12,500,000) shares of Preferred Stock shall have no voting power whatsoever, except as may be otherwise provided by law or except as may arise upon a default, failure or other contingency (collectively, "Non-Voting Preferred Stock").

All shares of any one series of Preferred Stock shall be alike in every particular, each series thereof shall be distinctively designated by letter or descriptive words, and all series of Preferred Stock shall rank equally and be identical in all respects except as provided above with respect to Voting Preferred Stock and Non-Voting Preferred Stock or as permitted by the provisions of Clause (b) of this Part One of Article FOURTH.

(b)Authority is hereby expressly granted to the Board of Directors from time to time to adopt amendments to these Articles of Incorporation providing for the issue in one or more series of any unissued or treasury shares of Preferred Stock, and providing, to the fullest extent now or hereafter permitted by the laws of the State of Ohio and notwithstanding the provisions of any other Article of these Articles of Incorporation of the Corporation, in respect of the matters set forth in the following subdivisions (i) to (x), inclusive, as well as any other rights or matters pertaining to such series:

(i)The designation and number of shares of such series;

(ii)With respect to the Voting Preferred Stock only, voting rights (to the fullest extent now or hereafter permitted by the laws of the State of Ohio);

(iii)With respect to the Non-Voting Preferred Stock only, voting rights upon a default, failure or other contingency;

1

(iv)The dividend rate or rates of such series (which may be a variable rate or adjustable rate and which may be cumulative);

(v)The dividend payment date or dates of such series;

(vi)The price or prices at which shares of such series may be redeemed;

(vii)The amount of the sinking fund, if any, to be applied to the purchase or redemption of shares of such series and the manner of its application;

(viii)The liquidation price or prices of such series;

(ix)Whether or not the shares of such series shall be made convertible into, or exchangeable for, shares of any other class or classes or of any other series of the same class of stock of the Corporation or any other property, and if made so convertible or exchangeable, the conversion price or prices, or the rates of exchange at which such conversion or exchange may be made and the adjustments thereto, if any; and,

(x)Whether or not the issue of any additional shares of such series or any future series in addition to such series shall be subject to any restrictions and, if so, the nature of such restrictions.

Any of the voting rights (with respect to the Voting Preferred Stock only), voting rights upon a default, failure or other contingency (with respect to the Non-Voting Preferred Stock only), dividend rate or rates, dividend payment date or dates, redemption rights and price or prices, sinking fund requirements, liquidation price or prices, conversion or exchange rights and restrictions on issuance of shares of any such series of Preferred Stock may, to the fullest extent now or hereafter permitted by the laws of the State of Ohio, be made dependent upon facts ascertainable outside these Articles of Incorporation or outside the amendment or amendments providing for the issue of such Preferred Stock adopted by the Board of Directors pursuant to authority expressly vested in it by this Article FOURTH. Any of the terms of any series may be established as senior to or having preference over the terms of any other series, whether or not outstanding at the time of adoption of the amendment creating such series of Preferred Stock by the Board of Directors. If the then-applicable laws of the State of Ohio do not permit the Board of Directors to fix, by the amendment creating a series of Voting Preferred Stock, the voting rights of shares of such series, each holder of a share of such series of Voting Preferred Stock shall, except as may be otherwise provided by law, be entitled to one (1) vote for each share of Voting Preferred Stock of such series held by such holder.

FIFTH. Amendment to Articles of Incorporation. The Corporation shall have the right to amend, alter, change or repeal any provision contained in these Articles of Incorporation or any provision that may be added or inserted in these Articles of Incorporation, provided that:

(a)    Such amendment, alteration, change, repeal, addition or insertion is consistent with law and is accomplished in the manner now or hereafter prescribed by statute or these Articles of Incorporation;

(b)    Any provision of these Articles of Incorporation which requires, or the change of which requires, the vote or consent of all or a specific number or percentage of the holders of shares of any class or series shall not be amended, altered, changed or repealed by any lesser amount, number or percentage of votes or consents of such class or series; and,

(c)    No amendment to these Articles of Incorporation pursuant to Ohio Revised Code §1701.69(B)(10) or any successor provision may be adopted without the affirmative vote or consent of the holders of an aggregate of two-thirds of the total voting power of the Corporation.

Any rights at any time conferred upon the shareholders of the Corporation are granted subject to the provisions of this Article.

SIXTH. No holder of any shares of this Corporation shall have any preemptive rights to subscribe for or to purchase any shares of this Corporation of any class, whether such shares or such class be now or hereafter authorized, or to purchase or subscribe for any security convertible into, or exchangeable for, shares of any class or to which shall be attached or appertained any warrants or rights entitling the holder thereof to purchase or subscribe for shares of any class.

SEVENTH. This Corporation, through its Board of Directors, shall have the right and power to purchase any of its outstanding shares at such price and upon such terms as may be agreed upon between the Corporation and any selling shareholder.

2

EIGHTH. Subject to the provisions of Article FIFTH hereof, the affirmative vote of shareholders entitled to exercise a majority of the voting power of this Corporation shall be required to amend these Articles of Incorporation, approve mergers and to take any other action which by law must be approved by a specified percentage of the voting power of the Corporation or of all outstanding shares entitled to vote.

NINTH. The provisions of Ohio Revised Code Chapter 1704 or any successor provisions relating to transactions involving interested shareholders shall not be applicable to the Corporation.

TENTH. The provisions of Ohio Revised Code §1701.831 or any successor provisions relating to control share acquisitions shall not be applicable to the Corporation.

ELEVENTH. These Amended and Restated Articles of Incorporation take the place of and supersede the existing Articles of Incorporation of the Corporation as heretofore amended and/or restated.

3

EX-10.D

Exhibit 10(d)

SENIOR EXECUTIVE ANNUAL BONUS PLAN

AMERICAN FINANCIAL GROUP, INC.

SENIOR EXECUTIVE ANNUAL BONUS PLAN

1. PURPOSE

The purpose of the Senior Executive Annual Bonus Plan (the “Plan”) is to further the profitability of American Financial Group, Inc. (the “Company”) to the benefit of the shareholders of the Company through promoting high levels of corporate performance by including performance-based compensation as a component of a Plan participant’s annual compensation.

2. DEFINITIONS

When used in the Plan, the following terms have the following meanings.

2.1.    “Board” means the Board of Directors of the Company.

2.2.    “Bonus Year” means a calendar year.

2.3.    “Code” means the Internal Revenue Code of 1986, as amended.

2.4.    “Committee” means the committee appointed by the Board as described under Section 3.

2.5    “Participant" means as to any Bonus Year, the senior executive officers of the Company or a Subsidiary who are designated by the Committee to participate in the Plan for that Bonus Year.

2.6    “Performance Criteria” means the objective targets selected by the Committee to measure performance, the outcome of which is substantially uncertain at the time selected, for a Bonus Year which shall be based upon one or more of the following performance-based business criteria, either on a Company, Subsidiary, division, business unit or line of business basis or in comparison with peer group performance or to an index, as the Committee deems appropriate: net income or operating income; net income per share or operating income per share; aggregate or per-share book value or adjusted book value; written premiums (net or gross); return measures (including, but not limited to, return on assets, investment portfolio, capital, invested capital, equity, sales, or premiums); cash flow (including, but not limited to, operating cash flow, free cash flow, and cash flow return on capital); combined ratios; share price (including, but not limited to, growth measures and total shareholder return); and increase in or maintenance of the Company’s market share. In the discretion of the Committee at the time of the annual selection of Performance Criteria for the Bonus Year, any Performance Criteria may be calculated after accounting for specified adjustments.

2.7.    “Subsidiary” means a subsidiary of the Company within the meaning of Code Section 424(f).

3.ADMINISTRATION

Bonuses under the Plan are intended to be performance-based compensation for purposes of Section 162(m)(4)(C) of the Code. Except as otherwise expressly provided in this Plan, the Plan shall be administered by the Compensation Committee or a successor committee or subcommittee of the Board comprised solely of two or more "outside directors" as defined pursuant to Section 162(m) of the Code. Subject to the provisions of the Plan (and to the approval of the Board where specified in the Plan), the Committee shall have exclusive power to determine the Performance Criteria applicable to bonuses and all other terms and conditions (including performance requirements) to which the payment of the bonuses may be subject and to certify that Performance Criteria are attained. Subject to the provisions of the Plan, the Committee shall have the authority to interpret the Plan and establish, adopt or revise such rules and regulations and to make all determinations relating to the Plan as it may deem necessary or advisable for the administration of the Plan. The Committee’s interpretation of the Plan and all of its actions and decisions with respect to the Plan shall be final, binding and conclusive on all parties.

4.PLAN TERM

The Plan shall remain in effect from the date of approval by the Board until terminated or suspended by the Board as provided in Section 11.

1

5.ESTABLISHMENT OF INDIVIDUAL BONUS TARGETS AND PERFORMANCE CRITERIA

The Committee shall approve annually, no later than the 90^th day of a Bonus Year, the individual target amount of bonus (the “Bonus Target”) that may be awarded for a Bonus Year to each Participant; the specific Performance Criteria to be used to determine the amount of bonus, if any, to be paid to each Participant for the Bonus Year; and the formula for determining the percentage of a Bonus Target that is payable based upon the achievement of Performance Criteria. The Performance Criteria may differ from and carry a different weight from Participant to Participant. The Bonus Target and Performance Criteria for each Participant for each Bonus Year shall be established in writing by the Committee.

The Committee shall establish annually the specific Performance Criteria to be used to determine the amount of bonus, if any, to be paid to each Participant under the Plan.

6.DETERMINATION OF BONUSES AND TIME OF PAYMENT

As soon as practicable after the end of each Bonus Year, the Committee shall determine whether or not the Performance Criteria of each Participant have been attained and shall determine the amount of the bonus, if any, to be awarded to each Participant for such year according to the terms of this Plan. Such bonus determinations shall be based on achievement of the Performance Criteria for such Bonus Year. The Committee shall certify in writing that the Performance Criteria have been achieved prior to payment of any bonus under the Plan. The payment, if any, of a bonus amount shall take place between February 1 and March 15 following any Bonus Year. The Participant must continue to be employed through the last day of the Bonus Year to be eligible for the bonus.

Once the bonus is so determined for each Participant, it shall be paid in cash. The maximum amount which may be awarded to any Participant for any Bonus Year shall be $5,000,000.

7.TERMINATION OF EMPLOYMENT

Notwithstanding the requirement to be employed on the last day of the Bonus Year in order to be eligible for payment of the Bonus Amount described in Section 6, if a Participant’s employment with the Company is terminated during a Bonus Year for which Performance Criteria have been attained for any reason other than discharge for “cause,” the Committee, in its sole discretion, may determine that the Participant is entitled to a portion of the Bonus Amount that is determined at the end of the Bonus Year and payable at the time specified in Section 6. This provision only provides discretion in determining whether to waive the employment requirement. In the event the employment requirement is waived, the bonus amount payable shall be a pro rata amount based on the number of months of the Participant’s employment during the Bonus Year with the month of termination counting as a full month of employment. For purposes of the Plan, “cause” shall mean: (i) a Participant’s failure or refusal to materially perform his duties; (ii) a Participant’s failure or refusal to follow material directions of the Board or any other act of material insubordination on the part of Participant; (iii) the commission by a Participant of an act of fraud or embezzlement against the Company; or (iv) any conviction of, or plea of guilty or nolo contendere to, a felony by a Participant.

In the event of a Participant’s discharge for cause from the employment of the Company or a Subsidiary, as the case may be, he shall not be entitled to any amount of bonus.

8.COMPLIANCE WITH SECTION 409A OF THE CODE

It is intended that this Plan shall either be exempt from the application of, or comply with, the requirements of Section 409A of the Code. This Plan shall be construed, administered, and governed in a manner that reflects such intent, and the Committee shall not take any action that would be inconsistent with such intent. Without limiting the foregoing, bonus amounts shall not be deferred, accelerated, extended, paid out, settled, adjusted, substituted, exchanged or modified in a manner that would cause the award to fail to satisfy the conditions of an applicable exception from the requirements of Section 409A of the Code or otherwise would subject the Participant to the additional tax imposed under Section 409A of the Code. The amounts payable pursuant to this Agreement are intended to be separate payments that qualify for the “short-term deferral” exception to Section 409A of the Code to the maximum extent possible.

2

9.RECOUPMENT

In the event of a restatement of materially inaccurate financial results, the Committee has the discretion to recover bonus awards that were paid under the Plan to a Participant with respect to the period covered by the restatement. If the payment of a bonus award would have been lower had the achievement of applicable financial performance targets been calculated based on such restated financial results, the Committee may, if it determines appropriate in its sole discretion, to the extent permitted by law, recover from the Participant the portion of the bonus award paid in excess of the payment that would have been made based on the restated financial results. The Company will not seek to recover bonus awards paid more than three years after the date the Company files the report with the Securities and Exchange Commission that contained the incorrect financial results. This Section 9 is in addition to, and not in lieu of, any requirements under any applicable law or regulation, including but not limited to the Sarbanes-Oxley Act of 2002 and the Dodd-Frank Wall Street Reform and Consumer Protection Act and shall apply notwithstanding anything to the contrary in the Plan.

10.MISCELLANEOUS

10.1.    Government and Other Regulations. The obligation of the Company to make payment of bonuses shall be subject to all applicable laws, rules and regulations and to such approvals by governmental agencies as may be required.

10.2.    Tax Withholding. The Company or a Subsidiary, as appropriate, shall have the right to deduct from all bonuses paid in cash any federal, state or local taxes required by law to be withheld with respect to such cash payments.

10.3.    Claim to Bonuses and Employment Rights. Neither this Plan nor any action taken hereunder shall be construed as giving any Participant any right to be retained in the employ of the Company or a Subsidiary.

10.4.    Beneficiaries. Any bonuses awarded under this Plan to a Participant who dies prior to payment shall be paid as specified in Section 6 to the beneficiary designated by the Participant on a form filed with the Company. If no such beneficiary has been designated or survives the Participant, payment shall be made to the Participant’s legal representative. A beneficiary designation may be changed or revoked by a Participant at any time provided the change or revocation is filed with the Company. If the Participant dies during a Bonus Year and while employed, the payment shall be made at the end of the Bonus Year at the time specified in Section 6 and shall be a pro rata amount based on the Participant’s months of employment during the Bonus Year prior to death with the month of death counting as a full month of employment.

10.5.    Nontransferability. A person’s rights and interests under the Plan may not be assigned, pledged or transferred except, in the event of a Participant’s death, to his designated beneficiary as provided in the Plan or, in the absence of such designation, by will or the laws of descent and distribution.

10.6.    Indemnification. Each person who is or shall have been a member of the Committee or of the Board shall be indemnified and held harmless by the Company (to the extent permitted by the Articles of Incorporation and Code of Regulations of the Company and applicable law) against and from any loss, cost, liability or expense that may be imposed upon or reasonably incurred by him in connection with or resulting from any claim, action, suit or proceeding to which he may be a party or in which they may be involved by reason of any action taken or failure to act under the Plan and against and from any and all amounts paid by him in settlement thereof, with the Company’s approval, or paid by him, in satisfaction of judgment in any such action, suit or proceeding against him. He shall give the Company an opportunity, at its own expense, to handle and defend the same before he undertakes to handle and defend it on his own behalf. The foregoing right of indemnification shall not be exclusive of any other rights of indemnification to which such person may be entitled under the Company’s Articles of Incorporation or Code of Regulations, as a matter of law or otherwise or of any power that the Company may have to indemnify him or hold him harmless.

10.7.    Reliance on Reports. Each member of the Committee and each member of the Board shall be fully justified in relying or acting in good faith upon any report made by the independent certified public accountants of the Company or of its Subsidiaries or upon any other information furnished in connection with the Plan by any officer or director of the Company or any of its Subsidiaries. In no event shall any person who is or shall have been a member of the Committee or of the Board be liable for any determination made or other action taken or any omission to act in

3

reliance upon any such report or information or for any action taken, including the furnishing of information, or failure to act, if in good faith.

10.8.    Expenses. The expenses of administering the Plan shall be borne by the Company and its subsidiaries in such proportions as shall be agreed upon by them from time to time.

10.9    Pronouns. Masculine pronouns and other words of masculine gender shall refer to both men and women.

10.10.    Titles and Headings. The titles and headings of the sections in the Plan are for convenience of reference only, and, in the event of any conflict between any such title or heading and the text of the Plan, such text shall control.

11.AMENDMENT AND TERMINATION

The Board may at any time terminate the Plan. The Board may at any time, or from time to time, amend or suspend and, if suspended, reinstate the Plan in whole or in part. Notwithstanding the foregoing, the Plan shall continue in effect to the extent necessary to settle all matters relating to the payment of bonuses awarded prior to any such termination or suspension.

4

EX-12

Exhibit 12

AMERICAN FINANCIAL GROUP, INC. AND SUBSIDIARIES

COMPUTATION OF RATIOS OF EARNINGS TO FIXED CHARGES

(Dollars in Millions)

	Year ended December 31,
	2017			2016			2015			2014			2013
Earnings before income taxes	$	724		$	787		$	565		$	626		$	689
Undistributed equity in earnings of investees	(4		)	(25		)	(18		)	(10		)	—
Losses of managed investment entities attributable to noncontrolling interest	—			—			—			51			26
Fixed charges:
Interest on annuities	892			800			732			648			531
Interest expense	84			76			74			73			71
Debt discount, expense and other fixed charges	1			1			1			1			1
Portion of rentals representing interest	23			23			23			22			19
EARNINGS	$	1,720		$	1,662		$	1,377		$	1,411		$	1,337
Fixed charges:
Interest on annuities	$	892		$	800		$	732		$	648		$	531
Interest expense	84			76			74			73			71
Debt discount, expense and other fixed charges	1			1			1			1			1
Portion of rentals representing interest	23			23			23			22			19
FIXED CHARGES	$	1,000		$	900		$	830		$	744		$	622
Ratio of Earnings to Fixed Charges	1.72			1.85			1.66			1.90			2.15
Earnings in Excess of Fixed Charges	$	720		$	762		$	547		$	667		$	715

E-1

EX-21

Exhibit 21

AMERICAN FINANCIAL GROUP, INC.

SUBSIDIARIES OF THE REGISTRANT

The following is a list of subsidiaries of AFG at December 31, 2017. All corporations are subsidiaries of AFG and, if indented, subsidiaries of the company under which they are listed. The names of certain subsidiaries are omitted, as such subsidiaries in the aggregate would not constitute a significant subsidiary.

Name of Company	Incorporated	Percentage of Ownership
American Money Management Corporation	Ohio	100
APU Holding Company	Ohio	100
American Premier Underwriters, Inc.	Pennsylvania	100
GAI Holding Bermuda Ltd.	Bermuda	77 (a)
GAI Indemnity, Ltd.	United Kingdom	100
Neon Capital Limited	United Kingdom	100
Neon Holdings (U.K.) Limited	United Kingdom	100
Lavenham Underwriting Limited	United Kingdom	100
Neon Service Company (U.K.) Limited	United Kingdom	100
Sampford Underwriting Limited	United Kingdom	100
Great American Financial Resources, Inc.	Delaware	100
Great American Life Insurance Company	Ohio	100
Annuity Investors Life Insurance Company	Ohio	100
Manhattan National Holding Corporation	Ohio	100
Manhattan National Life Insurance Company	Ohio	100
Great American Holding, Inc.	Ohio	100
Great American International Insurance Designated Activity Company	Ireland	100
Mid-Continent Casualty Company	Ohio	100
Mid-Continent Assurance Company	Ohio	100
Mid-Continent Excess and Surplus Insurance Company	Delaware	100
Oklahoma Surety Company	Ohio	100
Republic Indemnity Company of America	California	100
Republic Indemnity Company of California	California	100
Summit Holding Southeast, Inc.	Florida	100
Bridgefield Employers Insurance Company	Florida	100
Bridgefield Casualty Insurance Company	Florida	100
Great American Insurance Company	Ohio	100
American Empire Surplus Lines Insurance Company	Delaware	100
American Empire Insurance Company	Ohio	100
Brothers Property Corporation	Ohio	80
El Aguila, Compañia de Seguros, S.A. de C.V.	Mexico	100
GAI Warranty Company	Ohio	100
GAI Warranty Company of Florida	Florida	100
Great American Alliance Insurance Company	Ohio	100
Great American Assurance Company	Ohio	100
Great American Casualty Insurance Company	Ohio	100
Great American Contemporary Insurance Company	Ohio	100
Great American E&S Insurance Company	Delaware	100
Great American Fidelity Insurance Company	Delaware	100
Great American Insurance Company of New York	New York	100
Great American Protection Insurance Company	Ohio	100
Great American Security Insurance Company	Ohio	100
Great American Spirit Insurance Company	Ohio	100
National Interstate Corporation	Ohio	100
Hudson Indemnity, Ltd.	Cayman Islands	100
National Interstate Insurance Company	Ohio	100
National Interstate Insurance Company of Hawaii, Inc.	Ohio	100
Triumphe Casualty Company	Ohio	100
Vanliner Insurance Company	Missouri	100
Professional Risk Brokers, Inc.	Illinois	100
Helium Holdings Limited	Bermuda	100
Neon Employee Ownership LLC	Delaware	23.35 (b)
GAI Australia Pty Ltd.	Australia	100 (c)

(a) AFG directly owns 69.99% of GAI Holding Bermuda Ltd. and the remaining 30.01% is owned by GAI Australia Pty Ltd. (see footnote C below).

(b) AFG's 100%-owned subsidiary, Helium Holdings Limited, owns 23.35% (but the majority of the voting interest) of Neon Employee Ownership LLC ("NEO"). The remaining 76.65% is owned by the management of Neon Capital Limited.

(c) NEO owns 100% of the common stock of GAI Australia Pty Ltd. Accordingly, the noncontrolling shareholders of NEO indirectly own approximately 23% of GAI Holding Bermuda (76.65% of NEO multiplied by the 30.01% of GAI Holding Bermuda owned by GAI Australia).

E-2

EX-23

Exhibit 23

AMERICAN FINANCIAL GROUP, INC. AND SUBSIDIARIES

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the following Registration Statements and related Prospectuses of American Financial Group, Inc. of our reports dated February 23, 2018, with respect to the consolidated financial statements and schedules of American Financial Group, Inc. and subsidiaries and the effectiveness of internal control over financial reporting of American Financial Group, Inc. and subsidiaries, included in this Annual Report (Form 10-K) of American Financial Group, Inc. and subsidiaries for the year ended December 31, 2017.

	Registration
Form	Number	Description
S-8	33-58827	Employee Stock Purchase Plan
S-3	333-102567	Dividend Reinvestment Plan
S-8	333-117062	Non-employee Directors Compensation Plan
S-8	333-184913	Non-employee Directors Compensation Plan
S-8	333-14935	Retirement and Savings Plan
S-8	333-91945	Deferred Compensation Plan
S-8	333-125304	2005 Stock Incentive Plan
S-8	333-170343	2005 Stock Incentive Plan
S-8	333-184914	2005 Stock Incentive Plan
S-8	333-206291	2015 Stock Incentive Plan
S-3	333-202421	Shelf Registration
S-8	333-176192	2011 Equity Bonus Plan (formerly known as the 2011 Co-CEO Equity Bonus Plan)
S-8	333-184915	2011 Equity Bonus Plan (formerly known as the 2011 Co-CEO Equity Bonus Plan)

/s/ ERNST & YOUNG LLP

Cincinnati, Ohio

February 23, 2018

E-3

EX-31.A

Exhibit 31(a)

AMERICAN FINANCIAL GROUP, INC.

SARBANES-OXLEY SECTION 302(a) CERTIFICATIONS

I, Carl H. Lindner III, certify that:

1. I have reviewed this annual report on Form 10-K of American Financial Group, Inc.;

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 officers 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 officers 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 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.

February 23, 2018	By:	/s/ Carl H. Lindner III
		Carl H. Lindner III
		Co-Chief Executive Officer

E-4

EX-31.B

Exhibit 31(b)

AMERICAN FINANCIAL GROUP, INC.

SARBANES-OXLEY SECTION 302(a) CERTIFICATIONS

I, S. Craig Lindner, certify that:

1. I have reviewed this annual report on Form 10-K of American Financial Group, Inc.;

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 officers 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 officers 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 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.

February 23, 2018	By:	/s/ S. Craig Lindner
		S. Craig Lindner
		Co-Chief Executive Officer

E-5

EX-31.C

Exhibit 31(c)

AMERICAN FINANCIAL GROUP, INC.

SARBANES-OXLEY SECTION 302(a) CERTIFICATIONS

I, Joseph E. (Jeff) Consolino, certify that:

1. I have reviewed this annual report on Form 10-K of American Financial Group, Inc.;

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 officers 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 officers 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 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.

February 23, 2018	By:	/s/ Joseph E. (Jeff) Consolino
		Joseph E. (Jeff) Consolino
		Executive Vice President and Chief Financial Officer

E-6

EX-32

Exhibit 32

AMERICAN FINANCIAL GROUP, INC.

CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER

Pursuant to section 906 of the Sarbanes-Oxley Act of 2002

In connection with the filing with the Securities and Exchange Commission of the Annual Report of American Financial Group, Inc. (the “Company”) on Form 10-K for the period ended December 31, 2017 (the “Report”), the undersigned officers of the Company, certify, pursuant to section 906 of the Sarbanes-Oxley Act of 2002, that to the best of their knowledge:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities 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.

February 23, 2018	By:	/s/ Carl H. Lindner III
Date		Carl H. Lindner III
		Co-Chief Executive Officer
February 23, 2018	By:	/s/ S. Craig Lindner
Date		S. Craig Lindner
		Co-Chief Executive Officer
February 23, 2018	By:	/s/ Joseph E. (Jeff) Consolino
Date		Joseph E. (Jeff) Consolino
		Executive Vice President and Chief Financial Officer

A signed original of this written statement will be retained by the Registrant and

furnished to the Securities and Exchange Commission or its staff upon request.

E-7

XML

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Feb. 01, 2018	Jun. 30, 2017
Document and Entity Information [Abstract]
Entity Registrant Name	AMERICAN FINANCIAL GROUP INC
Entity Central Index Key	0001042046
Document Type	10-K
Document Period End Date	Dec. 31, 2017
Amendment Flag	false
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$ 7,640
Entity Common Stock, Shares Outstanding		88,425,972

XML

Consolidated Balance Sheet - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Assets:
Cash and cash equivalents	$ 2,338	$ 2,107
Investments:
Fixed maturities, available for sale at fair value (amortized cost — $37,038 and $33,735)	38,379	34,544
Fixed maturities, trading at fair value	348	359
Equity securities, available for sale at fair value (cost — $1,321 and $1,351)	1,600	1,502
Equity securities, trading at fair value	62	56
Mortgage loans	1,125	1,147
Policy loans	184	192
Equity index call options	701	492
Real estate and other investments	1,311	1,034
Total cash and investments	46,048	41,433
Recoverables from reinsurers	3,369	2,737
Prepaid reinsurance premiums	600	539
Agents’ balances and premiums receivable	1,146	997
Deferred policy acquisition costs	1,216	1,239
Assets of managed investment entities	4,902	4,765
Other receivables	1,030	908
Variable annuity assets (separate accounts)	644	600
Other assets	1,504	1,655
Goodwill	199	199
Total assets	60,658	55,072
Liabilities and Equity:
Unpaid losses and loss adjustment expenses	9,678	8,563
Unearned premiums	2,410	2,171
Annuity benefits accumulated	33,316	29,907
Life, accident and health reserves	658	691
Payable to reinsurers	743	634
Liabilities of managed investment entities	4,687	4,549
Long-term debt	1,301	1,283
Variable annuity liabilities (separate accounts)	644	600
Other liabilities	1,887	1,755
Total liabilities	55,324	50,153
Temporary equity
Redeemable noncontrolling interests	3	0
Shareholders’ equity:
Common Stock, no par value — 200,000,000 shares authorized — 88,275,460 and 86,924,399 shares outstanding	88	87
Capital surplus	1,181	1,111
Retained earnings	3,248	3,343
Accumulated other comprehensive income, net of tax	813	375
Total shareholders’ equity	5,330	4,916
Noncontrolling interests	1	3
Total equity	5,331	4,919
Total liabilities and equity	$ 60,658	$ 55,072

XML

Consolidated Balance Sheet (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Fixed maturities, available for sale at amortized cost	$ 37,038	$ 33,735
Equity securities, available for sale at cost	$ 1,321	$ 1,351
Common Stock, par value (USD per share)	$ 0	$ 0
Common Stock, shares authorized	200,000,000	200,000,000
Common Stock, shares outstanding	88,275,460	86,924,399

XML

Consolidated Statement of Earnings - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues:
Property and casualty insurance net earned premiums	$ 4,579	$ 4,328	$ 4,224
Life, accident and health net earned premiums	22	24	104
Net investment income	1,831	1,696	1,633
Realized gains (losses) on:
Securities	5	19	(19)
Subsidiaries	0	2	(161)
Income (loss) of managed investment entities:
Investment income	210	190	155
Gain (loss) on change in fair value of assets/liabilities	12	15	(34)
Other income	206	224	243
Total revenues	6,865	6,498	6,145
Costs and Expenses:
Property and casualty insurance: Losses and loss adjustment expenses	2,955	2,762	2,695
Property and casualty insurance: Commissions and other underwriting expenses	1,407	1,349	1,320
Annuity benefits	892	800	732
Life, accident and health benefits	26	33	131
Annuity and supplemental insurance acquisition expenses	173	186	179
Interest charges on borrowed money	85	77	75
Expenses of managed investment entities	181	151	112
Other expenses	422	353	336
Total costs and expenses	6,141	5,711	5,580
Earnings before income taxes	724	787	565
Provision for income taxes	247	119	195
Net earnings, including noncontrolling interests	477	668	370
Less: Net earnings attributable to noncontrolling interests	2	19	18
Net Earnings Attributable to Shareholders	$ 475	$ 649	$ 352
Earnings Attributable to Shareholders per Common Share:
Basic (USD per share)	$ 5.40	$ 7.47	$ 4.02
Diluted (USD per share)	$ 5.28	$ 7.33	$ 3.94
Average number of Common Shares:
Basic (shares)	87.8	86.9	87.6
Diluted (shares)	89.8	88.5	89.4
Cash dividends per Common Share (USD per share)	$ 4.7875	$ 2.1525	$ 2.03
Supplemental disclosure of Realized gains (losses) on securities:
Realized gains before impairments	$ 78	$ 135	$ 106
Losses on securities with impairment	(74)	(115)	(125)
Non-credit portion recognized in other comprehensive income (loss)	1	(1)	0
Impairment charges recognized in earnings	(73)	(116)	(125)
Total realized gains (losses) on securities	$ 5	$ 19	$ (19)

XML

Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of Comprehensive Income [Abstract]
Net earnings, including noncontrolling interests	$ 477	$ 668	$ 370
Net unrealized gains (losses) on securities:
Unrealized holding gains (losses) on securities arising during the period	297	80	(406)
Reclassification adjustment for realized (gains) losses included in net earnings	(10)	(12)	9
Reclassification for unrealized gains of subsidiaries sold	0	0	(22)
Total net unrealized gains (losses) on securities	287	68	(419)
Net unrealized gains (losses) on cash flow hedges	(4)	(8)	1
Foreign currency translation adjustments	12	7	(14)
Pension and other postretirement plans adjustments	1	0	1
Other comprehensive income (loss), net of tax	296	67	(431)
Total comprehensive income (loss), net of tax	773	735	(61)
Less: Comprehensive income attributable to noncontrolling interests	2	24	10
Comprehensive income (loss) attributable to shareholders	$ 771	$ 711	$ (71)

XML

Consolidated Statement of Changes in Equity - USD ($) $ in Millions	Total	Total	Common Shares	Common Stock and Capital Surplus	Retained Earnings	Accumulated Other Comprehensive Inc. (Loss)		Noncontrolling Interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of accounting change	$ 2	$ 2			$ 2
Beginning Balance, shares at Dec. 31, 2014			87,708,793
Beginning Balance at Dec. 31, 2014	5,054	4,879		$ 1,240	2,912	$ 727		$ 175
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	370	352			352			18
Other comprehensive income (loss)	(431)	(423)				(423)		(8)
Dividends on Common Stock	(178)	(178)			(178)
Shares issued:
Exercise of stock options, shares			1,475,202
Exercise of stock options	47	47		47
Restricted stock awards, shares			171,130
Restricted stock awards	0	0		0
Other benefit plans, shares			111,681
Other benefit plans	7	7		7
Dividend reinvestment plan, shares			26,167
Dividend reinvestment plan	2	2		2
Stock-based compensation:
Stock-based compensation: Expense	21	21		21
Stock-based compensation: Excess tax benefits	12	12		12
Shares acquired and retired, shares			(1,955,186)
Shares acquired and retired	(126)	(126)		(27)	(99)
Shares exchanged — benefit plans, shares			(45,765)
Shares exchanged — benefit plans	(3)	(3)		(1)	(2)
Forfeitures of restricted stock, shares			(17,570)
Forfeitures of restricted stock	0	0		0
Other	(7)				0			(7)
Ending Balance, shares at Dec. 31, 2015			87,474,452
Ending Balance at Dec. 31, 2015	4,770	4,592		1,301	2,987	304		178
Beginning Balance, Redeemable Noncontrolling Interests at Dec. 31, 2014	0
Ending Balance, Redeemable Noncontrolling Interests at Dec. 31, 2015	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	668	649			649			19
Other comprehensive income (loss)	67	62				62		5
Dividends on Common Stock	(187)	(187)			(187)
Shares issued:
Exercise of stock options, shares			958,344
Exercise of stock options	32	32		32
Restricted stock awards, shares			318,940
Restricted stock awards	0	0		0
Other benefit plans, shares			95,875
Other benefit plans	7	7		7
Dividend reinvestment plan, shares			25,516
Dividend reinvestment plan	2	2		2
Stock-based compensation:
Stock-based compensation: Expense	22	22		22
Shares acquired and retired, shares			(1,911,976)
Shares acquired and retired	(133)	(133)		(29)	(104)
Shares exchanged — benefit plans, shares			(32,707)
Shares exchanged — benefit plans	(2)	(2)		0	(2)
Forfeitures of restricted stock, shares			(4,045)
Forfeitures of restricted stock	0	0		0
Acquisition of noncontrolling interests	(315)	(128)		(137)		9	[1]	(187)
Other	$ (12)	0			0	0		(12)
Ending Balance, shares at Dec. 31, 2016	86,924,399		86,924,399
Ending Balance at Dec. 31, 2016	$ 4,919	4,916		1,198	3,343	375		3
Ending Balance, Redeemable Noncontrolling Interests at Dec. 31, 2016	0
Redeemable Noncontrolling Interest, Equity, Carrying Amount [Abstract]
Redeemable noncontrolling interests	0
Net earnings	477	475			475			2
Other comprehensive income (loss)	296	296				296		0
Dividends on Common Stock	$ (421)	(421)			(421)
Exercise of stock options, shares	1,020,986		1,020,986
Exercise of stock options	$ 34	34		34
Restricted stock awards, shares			232,250
Restricted stock awards	0	0		0
Other benefit plans, shares			99,588
Other benefit plans	10	10		10
Dividend reinvestment plan, shares			42,572
Dividend reinvestment plan	4	4		4
Stock-based compensation: Expense	24	24		24
Shares exchanged — benefit plans, shares			(37,718)
Shares exchanged — benefit plans	(5)	(5)		(1)	(4)
Forfeitures of restricted stock, shares			(6,617)
Forfeitures of restricted stock	0	0		0
Sale of redeemable noncontrolling interests	(3)	(3)				(3)		0
Other	$ (4)							(4)
Ending Balance, shares at Dec. 31, 2017	88,275,460		88,275,460
Ending Balance at Dec. 31, 2017	$ 5,331	5,330		$ 1,269	3,248	813		1
Ending Balance, Redeemable Noncontrolling Interests at Dec. 31, 2017	3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of accounting change	0	$ 0			$ (145)	$ 145		$ 0
Redeemable Noncontrolling Interest, Equity, Carrying Amount [Abstract]
Redeemable noncontrolling interests	$ 3

[1] Other includes the December 2017 reclassification of $145 million stranded in AOCI from accounting for the Tax Cuts and Jobs Act of 2017 to retained earnings (see Note A — “Accounting Policies — Income Taxes”), and the impact on AOCI of the December 2017 sale of redeemable noncontrolling interests in Neon and the November 2016 acquisition of the noncontrolling interest in NATL (see Note B — “Acquisitions and Sale of Businesses”).

XML

Consolidated Statement of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating Activities:
Net earnings, including noncontrolling interests	$ 477	$ 668	$ 370
Adjustments:
Depreciation and amortization	107	134	134
Annuity benefits	892	800	732
Realized (gains) losses on investing activities	(23)	(61)	100
Net sales of trading securities	17	79	10
Deferred annuity and life policy acquisition costs	(225)	(230)	(224)
Change in:
Reinsurance and other receivables	(963)	(315)	(10)
Other assets	13	(467)	(13)
Insurance claims and reserves	1,321	533	451
Payable to reinsurers	109	43	(54)
Other liabilities	(18)	265	12
Managed investment entities’ assets/liabilities	60	(279)	(190)
Other operating activities, net	37	(20)	35
Net cash provided by operating activities	1,804	1,150	1,353
Investing Activities:
Purchases of fixed maturities	(9,485)	(7,537)	(7,201)
Purchases of equity securities	(182)	(207)	(570)
Purchases of mortgage loans	(254)	(341)	(213)
Purchases of equity index call options and other investments	(831)	(738)	(534)
Purchases of real estate, property and equipment	(109)	(49)	(102)
Proceeds from maturities and redemptions of fixed maturities	6,105	4,713	3,333
Proceeds from repayments of mortgage loans	215	262	265
Proceeds from sales of fixed maturities	392	641	321
Proceeds from sales of equity securities	216	348	364
Proceeds from sales and settlements of equity index call options and other investments	789	319	374
Proceeds from sales of real estate, property and equipment	55	55	117
Proceeds from sales of businesses	0	0	7
Cash and cash equivalents of businesses sold	0	0	(49)
Managed investment entities:
Purchases of investments	(2,979)	(2,254)	(1,530)
Proceeds from sales and redemptions of investments	2,774	1,890	855
Other investing activities, net	2	(83)	(10)
Net cash used in investing activities	(3,292)	(2,981)	(4,573)
Financing Activities:
Annuity receipts	4,341	4,585	4,485
Annuity surrenders, benefits and withdrawals	(2,405)	(2,275)	(2,025)
Net transfers from variable annuity assets	54	42	43
Additional long-term borrowings	712	302	145
Reductions of long-term debt	(745)	(18)	(192)
Issuances of managed investment entities’ liabilities	2,731	2,293	1,026
Retirements of managed investment entities’ liabilities	(2,585)	(1,600)	(136)
Issuances of Common Stock	37	35	61
Repurchases of Common Stock	0	(133)	(126)
Cash dividends paid on Common Stock	(417)	(185)	(176)
Acquisition of noncontrolling interests in subsidiary	0	(315)	0
Other financing activities, net	(4)	(13)	(8)
Net cash provided by (used in) financing activities	1,719	2,718	3,097
Net Change in Cash and Cash Equivalents	231	887	(123)
Cash and cash equivalents at beginning of year	2,107	1,220	1,343
Cash and cash equivalents at end of year	$ 2,338	$ 2,107	$ 1,220

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Accounting Policies

12 Months Ended

Dec. 31, 2017

Accounting Policies [Abstract]

Accounting Policies

Accounting Policies

Basis of Presentation   The consolidated financial statements include the accounts of American Financial Group, Inc. and its subsidiaries (“AFG”). Certain reclassifications have been made to prior years to conform to the current year’s presentation. All significant intercompany balances and transactions have been eliminated. The results of operations of companies since their formation or acquisition are included in the consolidated financial statements. Events or transactions occurring subsequent to December 31, 2017, and prior to the filing of this Form 10-K, have been evaluated for potential recognition or disclosure herein.

The preparation of the financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”) requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Changes in circumstances could cause actual results to differ materially from those estimates.

Fair Value Measurements   Accounting standards define fair value as the price that would be received to sell an asset or paid to transfer a liability (an exit price) in an orderly transaction between market participants on the measurement date. The standards establish a hierarchy of valuation techniques based on whether the assumptions that market participants would use in pricing the asset or liability (“inputs”) are observable or unobservable. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect AFG’s assumptions about the assumptions market participants would use in pricing the asset or liability. AFG did not have any significant nonrecurring fair value measurements of nonfinancial assets and liabilities in 2017 or 2016.

Investments Fixed maturity and equity securities classified as “available for sale” are reported at fair value with unrealized gains and losses included in accumulated other comprehensive income (“AOCI”) in AFG’s Balance Sheet. Fixed maturity and equity securities classified as “trading” are reported at fair value with changes in unrealized holding gains or losses during the period included in net investment income. Mortgage and policy loans are carried primarily at the aggregate unpaid balance.

In January 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-01, which, among other things, will require all equity securities currently classified as “available for sale” to be reported at fair value, with holding gains and losses recognized in net earnings, instead of AOCI. AFG will be required to adopt this guidance effective January 1, 2018. At the date of adoption, the $221 million net unrealized gain on equity securities included in AOCI as of December 31, 2017 will be reclassified to retained earnings as the cumulative effect of an accounting change.

Premiums and discounts on fixed maturity securities are amortized using the effective interest method. Mortgage-backed securities (“MBS”) are amortized over a period based on estimated future principal payments, including prepayments. Prepayment assumptions are reviewed periodically and adjusted to reflect actual prepayments and changes in expectations.

Gains or losses on securities are determined on the specific identification basis. When a decline in the value of a specific investment is considered to be other-than-temporary at the balance sheet date, a provision for impairment is charged to earnings (included in realized gains (losses) on securities) and the cost basis of that investment is reduced. If management can assert that it does not intend to sell an impaired fixed maturity security and it is not more likely than not that it will have to sell the security before recovery of its amortized cost basis, then the other-than-temporary impairment is separated into two components: (i) the amount related to credit losses (recorded in earnings) and (ii) the amount related to all other factors (recorded in other comprehensive income). The credit-related portion of an other-than-temporary impairment is measured by comparing a security’s amortized cost to the present value of its current expected cash flows discounted at its effective yield prior to the impairment charge. Both components are shown in the statement of earnings. If management intends to sell an impaired security, or it is more likely than not that it will be required to sell the security before recovery, an impairment charge to earnings is recorded to reduce the amortized cost of that security to fair value.

Derivatives Derivatives included in AFG’s Balance Sheet are recorded at fair value. Changes in fair value of derivatives are included in earnings, unless the derivatives are designated and qualify as highly effective cash flow hedges. Derivatives that do not qualify for hedge accounting under GAAP consist primarily of (i) components of certain fixed maturity securities (primarily interest-only MBS) and (ii) the equity-based component of certain annuity products (included in annuity benefits accumulated) and related equity index call options designed to be consistent with the characteristics of the liabilities and used to mitigate the risk embedded in those annuity products.

To qualify for hedge accounting, at the inception of a derivative contract, AFG formally documents the relationship between the terms of the hedge and the hedged items and its risk management objective. This documentation includes defining how hedge effectiveness and ineffectiveness will be measured on a retrospective and prospective basis.

Changes in the fair value of derivatives that are designated and qualify as highly effective cash flow hedges are recorded in AOCI and are reclassified into earnings when the variability of the cash flows from the hedged items impacts earnings. Any hedge ineffectiveness is immediately recorded in current period earnings. When the change in the fair value of a qualifying cash flow hedge is included in earnings, it is included in the same line item in the statement of earnings as the cash flows from the hedged item. AFG uses interest rate swaps that are designated and qualify as highly effective cash flow hedges to mitigate interest rate risk related to certain floating-rate securities included in AFG’s portfolio of fixed maturity securities.

For derivatives that are designated and qualify as highly effective fair value hedges, changes in the fair value of the derivative, along with changes in the fair value of the hedged item attributable to the hedged risk, are recognized in current period earnings.

Goodwill Goodwill represents the excess of cost of subsidiaries over AFG’s equity in their underlying net assets. Goodwill is not amortized, but is subject to an impairment test at least annually. An entity is not required to complete the quantitative annual goodwill impairment test on a reporting unit if the entity elects to perform a qualitative analysis and determines that it is more likely than not that the reporting unit’s fair value exceeds its carrying amount.

Reinsurance Amounts recoverable from reinsurers are estimated in a manner consistent with the claim liability associated with the reinsured policies. AFG’s property and casualty insurance subsidiaries report as assets (i) the estimated reinsurance recoverable on paid and unpaid losses, including an estimate for losses incurred but not reported, and (ii) amounts paid or due to reinsurers applicable to the unexpired terms of policies in force. Payable to reinsurers includes ceded premiums due to reinsurers, as well as ceded premiums retained by AFG’s property and casualty insurance subsidiaries under contracts to fund ceded losses as they become due. AFG’s insurance subsidiaries also assume reinsurance from other companies. Earnings on reinsurance assumed is recognized based on information received from ceding companies.

An AFG subsidiary cedes life insurance policies to a third party on a funds withheld basis whereby the subsidiary retains the assets (securities) associated with the reinsurance contract. Interest is credited to the reinsurer based on the actual investment performance of the retained assets. This reinsurance contract is considered to contain an embedded derivative (that must be adjusted to fair value) because the yield on the payable is based on a specific block of the ceding company’s assets, rather than the overall creditworthiness of the ceding company. AFG determined that changes in the fair value of the underlying portfolio of fixed maturity securities is an appropriate measure of the value of the embedded derivative. The securities related to this contract are classified as “trading.” The adjustment to fair value on the embedded derivative offsets the investment income recorded on the adjustment to fair value of the related trading portfolio.

Deferred Policy Acquisition Costs (“DPAC”)   Policy acquisition costs (principally commissions, premium taxes and certain underwriting and policy issuance costs) directly related to the successful acquisition or renewal of an insurance contract are deferred. DPAC also includes capitalized costs associated with sales inducements offered to fixed annuity policyholders such as enhanced interest rates and premium and persistency bonuses.

For the property and casualty companies, DPAC is limited based upon recoverability without any consideration for anticipated investment income and is charged against income ratably over the terms of the related policies. A premium deficiency is recognized if the sum of expected claims costs, claims adjustment expenses and unamortized acquisition costs exceed the related unearned premiums. A premium deficiency is first recognized by charging any unamortized acquisition costs to expense to the extent required to eliminate the deficiency. If the premium deficiency is greater than unamortized acquisition costs, a liability is accrued for the excess deficiency and reported with unpaid losses and loss adjustment expenses.

DPAC related to annuities is deferred to the extent deemed recoverable and amortized, with interest, in relation to the present value of actual and expected gross profits on the policies. Expected gross profits consist principally of estimated future investment margin (estimated future net investment income less interest credited on policyholder funds) and surrender, mortality, and other life and annuity policy charges, less death, annuitization and guaranteed withdrawal benefits in excess of account balances and estimated future policy administration expenses. To the extent that realized gains and losses result in adjustments to the amortization of DPAC related to annuities, such adjustments are reflected as components of realized gains (losses) on securities.

DPAC related to traditional life and health insurance is amortized over the expected premium paying period of the related policies, in proportion to the ratio of annual premium revenues to total anticipated premium revenues. See “Life, Accident and Health Reserves” below for details on the impact of loss recognition on the accounting for traditional life and health insurance contracts.

DPAC includes the present value of future profits on business in force of annuity and life, accident and health insurance companies acquired (“PVFP”). PVFP represents the portion of the costs to acquire companies that is allocated to the value of the right to receive future cash flows from insurance contracts existing at the date of acquisition. PVFP is amortized with interest in relation to expected gross profits of the acquired policies for annuities and universal life products and in relation to the premium paying period for traditional life and health insurance products.

DPAC and certain other balance sheet amounts related to annuity, long-term care and life businesses are also adjusted, net of tax, for the change in expense that would have been recorded if the unrealized gains (losses) from securities had actually been realized. These adjustments are included in unrealized gains (losses) on marketable securities, a component of AOCI in AFG’s Balance Sheet.

Managed Investment EntitiesA company is considered the primary beneficiary of, and therefore must consolidate, a variable interest entity (“VIE”) based primarily on its ability to direct the activities of the VIE that most significantly impact that entity’s economic performance and the obligation to absorb losses of, or receive benefits from, the entity that could potentially be significant to the VIE.

AFG manages, and has investments in, collateralized loan obligations (“CLOs”) that are VIEs (see Note H — “Managed Investment Entities”). AFG has determined that it is the primary beneficiary of the CLOs because (i) its role as asset manager gives it the power to direct the activities that most significantly impact the economic performance of the CLOs and (ii) through its investment in the CLO debt tranches, it has exposure to CLO losses (limited to the amount AFG invested) and the right to receive CLO benefits that could potentially be significant to the CLOs.

On January 1, 2016, AFG adopted ASU 2015-02, which amended certain consolidation accounting guidance, including the VIE guidance that applies to collateralized financing entities such as CLOs. The new guidance affects how fee arrangements with CLO asset managers impact the determination of the primary beneficiary of those entities. Due to the significance of AFG’s investments in the CLOs that it manages, the new guidance did not impact the consolidation of AFG’s currently outstanding CLOs. The new guidance also impacted the consolidation analysis that applies to limited partnerships and similar entities, but did not result in a change to the accounting for AFG’s existing investments in those entities.

Because AFG has no right to use the CLO assets and no obligation to pay the CLO liabilities, the assets and liabilities of the CLOs are shown separately in AFG’s Balance Sheet. AFG has elected the fair value option for reporting on the CLO assets and liabilities to improve the transparency of financial reporting related to the CLOs. The net gain or loss from accounting for the CLO assets and liabilities at fair value is presented separately in AFG’s Statement of Earnings.

The fair values of a CLO’s assets may differ from the separately measured fair values of its liabilities even though the CLO liabilities only have recourse to the CLO assets. AFG has set the carrying value of the CLO liabilities equal to the fair value of the CLO assets (which have more observable fair values) as an alternative to reporting those liabilities at a separately measured fair value. CLO earnings attributable to AFG’s shareholders are measured by the change in the fair value of AFG’s investments in the CLOs and management fees earned.

Prior to the adoption of new guidance effective January 1, 2015, measuring both the CLO assets and CLO liabilities at separately determined fair values resulted in a difference between the carrying value of the CLO assets and the carrying value of the CLO liabilities that was not attributable to AFG’s ownership interest in the CLOs. This difference was recorded as “appropriated retained earnings — managed investment entities” in AFG’s Balance Sheet. In accordance with the guidance adopted in 2015, the amount reported as “appropriated retained earnings — managed investment entities” at December 31, 2014 was reclassified to “liabilities of managed investment entities” on January 1, 2015 as the cumulative effect of an accounting change.

Unpaid Losses and Loss Adjustment Expenses   The net liabilities stated for unpaid claims and for expenses of investigation and adjustment of unpaid claims represent management’s best estimate and are based upon (i) the accumulation of case estimates for losses reported prior to the close of the accounting period on direct business written; (ii) estimates received from ceding reinsurers and insurance pools and associations; (iii) estimates of unreported losses (including possible development on known claims) based on past experience; (iv) estimates based on experience of expenses for investigating and adjusting claims; and (v) the current state of the law and coverage litigation. Establishing reserves for asbestos, environmental and other mass tort claims involves considerably more judgment than other types of claims due to, among other things, inconsistent court decisions, an increase in bankruptcy filings as a result of asbestos-related liabilities, novel theories of coverage, and judicial interpretations that often expand theories of recovery and broaden the scope of coverage.

Loss reserve liabilities are subject to the impact of changes in claim amounts and frequency and other factors. Changes in estimates of the liabilities for losses and loss adjustment expenses are reflected in the statement of earnings in the period in which determined. Despite the variability inherent in such estimates, management believes that the liabilities for unpaid losses and loss adjustment expenses are adequate.

Annuity Benefits Accumulated   Annuity receipts and benefit payments are recorded as increases or decreases in annuity benefits accumulated rather than as revenue and expense. Increases in this liability for interest credited are charged to expense and decreases for policy charges are credited to other income.

For certain products, annuity benefits accumulated also includes reserves for accrued persistency and premium bonuses, guaranteed withdrawals and excess benefits expected to be paid on future deaths and annuitizations (“EDAR”). The liabilities for EDAR and guaranteed withdrawals are accrued for and modified using assumptions consistent with those used in determining DPAC and DPAC amortization, except that amounts are determined in relation to the present value of total expected assessments. Total expected assessments consist principally of estimated future investment margin, surrender, mortality, and other life and annuity policy charges, and unearned revenues once they are recognized as income.

Annuity benefits accumulated also includes amounts advanced from the Federal Home Loan Bank of Cincinnati.

Unearned Revenue   Certain upfront policy charges on annuities are deferred as unearned revenue (included in other liabilities) and recognized in net earnings (included in other income) using the same assumptions and estimated gross profits used to amortize DPAC.

Life, Accident and Health Reserves Liabilities for future policy benefits under traditional life, accident and health policies are computed using the net level premium method. Computations are based on the original projections of investment yields, mortality, morbidity and surrenders and include provisions for unfavorable deviations unless a loss recognition event (premium deficiency) occurs. Claim reserves and liabilities established for accident and health claims are modified as necessary to reflect actual experience and developing trends.

For long-duration contracts (such as traditional life and long-term care policies), loss recognition occurs when, based on current expectations as of the measurement date, existing contract liabilities plus the present value of future premiums (including reasonably expected rate increases) are not expected to cover the present value of future claims payments and related settlement and maintenance costs (excluding overhead) as well as unamortized acquisition costs. If a block of business is determined to be in loss recognition, a charge is recorded in earnings in an amount equal to the excess of the present value of expected future claims costs and unamortized acquisition costs over existing reserves plus the present value of expected future premiums (with no provision for adverse deviation). The charge is recorded first to reduce unamortized acquisition costs and then as an additional reserve (if unamortized acquisition costs have been reduced to zero).

In addition, reserves for traditional life and long-term care policies are subject to adjustment for loss recognition charges that would have been recorded if the unrealized gains (losses) from securities had actually been realized. This adjustment is included in unrealized gains (losses) on marketable securities, a component of AOCI in AFG’s Balance Sheet.

Debt Issuance CostsDebt issuance costs related to AFG’s outstanding debt are amortized over the life of the related debt using the effective interest method. Effective January 1, 2016, AFG adopted (on a retrospective basis) ASU 2015-03, which requires debt issuance costs to be presented in the balance sheet as a direct reduction in the carrying value of long-term debt (consistent with the treatment of debt discounts) with the periodic amortization of such costs included in interest expense. Debt issuance costs related to AFG’s revolving credit facilities will continue to be included in other assets in AFG’s Balance Sheet. Prior to AFG’s adoption of ASU 2015-03, AFG reported unamortized debt issuance costs as a deferred charge asset (included in other assets) in AFG’s Balance Sheet and the periodic amortization was included in other expenses in AFG’s Statement of Earnings. The updated guidance did not affect the overall recognition and measurement guidance for debt issuance costs. Accordingly, the guidance did not have an overall impact on AFG’s Shareholders’ Equity or results of operations.

Variable Annuity Assets and Liabilities   Separate accounts related to variable annuities represent the fair value of deposits invested in underlying investment funds on which AFG earns a fee. Investment funds are selected and may be changed only by the policyholder, who retains all investment risk.

AFG’s variable annuity contracts contain a guaranteed minimum death benefit (“GMDB”) to be paid if the policyholder dies before the annuity payout period commences. In periods of declining equity markets, the GMDB may exceed the value of the policyholder’s account. A GMDB liability is established for future excess death benefits using assumptions together with a range of reasonably possible scenarios for investment fund performance that are consistent with DPAC capitalization and amortization assumptions.

Premium Recognition   Property and casualty premiums are earned generally over the terms of the policies on a pro rata basis. Unearned premiums represent that portion of premiums written, which is applicable to the unexpired terms of policies in force. On reinsurance assumed from other insurance companies or written through various underwriting organizations, unearned premiums are based on information received from such companies and organizations. For traditional life, accident and health products, premiums are recognized as revenue when legally collectible from policyholders. For interest-sensitive life and universal life products, premiums are recorded in a policyholder account, which is reflected as a liability. Revenue is recognized as amounts are assessed against the policyholder account for mortality coverage and contract expenses.

Noncontrolling Interests   For balance sheet purposes, noncontrolling interests represent the interests of shareholders other than AFG in consolidated entities. In the statement of earnings, net earnings and losses attributable to noncontrolling interests represents such shareholders’ interest in the earnings and losses of those entities. Noncontrolling interests that are redeemable at the option of the holder are presented separately in the mezzanine section of the balance sheet (between liabilities and equity).

Income Taxes   Deferred income taxes are calculated using the liability method. Under this method, deferred income tax assets and liabilities are determined based on differences between financial reporting and tax bases and are measured using enacted tax rates. A valuation allowance is established to reduce total deferred tax assets to an amount that will more likely than not be realized.

AFG recognizes the tax benefits of uncertain tax positions only when the position is more likely than not to be sustained under examination by the appropriate taxing authority. Interest and penalties on AFG’s reserve for uncertain tax positions are recognized as a component of tax expense.

The effect of a change in tax rates on deferred tax assets and liabilities is recorded in net earnings in the period that includes the enactment date. This includes the impact on deferred tax assets or liabilities established through AOCI, which results in an amount equal to the difference between the deferred tax at the historical corporate rate and the newly enacted rate stranded in AOCI. As permitted under guidance adopted effective December 31, 2017 (ASU 2018-02), AFG reclassified the $145 million stranded in AOCI from accounting for the Tax Cuts and Jobs Act of 2017 to retained earnings at December 31, 2017. See Note L — “Income Taxes” for further information.

Stock-Based Compensation All share-based grants are recognized as compensation expense on a straight-line basis over their vesting periods based on their calculated fair value at the date of grant. AFG uses the Black-Scholes pricing model to measure the fair value of employee stock options. See Note K — “Shareholders’ Equity” for further information.

In the fourth quarter of 2016, AFG early adopted ASU 2016-09, which, among other things, requires excess tax benefits or deficiencies for share-based payments to be recorded through income tax expense in the statement of earnings instead of directly to capital surplus (as required under the previous guidance). As a result, AFG’s Statement of Earnings includes a tax benefit of $17 million in 2017 and $9 million in 2016 that under the previous guidance would have been recorded directly to capital surplus. In addition, the new guidance allows entities to elect to account for forfeitures of awards when they occur rather than accruing expense based on an estimate of expected forfeitures (as required under the previous guidance). AFG has elected to account for forfeitures as they occur. The resulting cumulative effect of accounting change of less than $1 million was recorded directly to retained earnings on January 1, 2016.

Benefit Plans   AFG provides retirement benefits to qualified employees of participating companies through the AFG 401(k) Retirement and Savings Plan, a defined contribution plan. AFG makes all contributions to the retirement fund portion of the plan and matches a percentage of employee contributions to the savings fund. Company contributions are expensed in the year for which they are declared. AFG and many of its subsidiaries provide health care and life insurance benefits to eligible retirees. AFG also provides postemployment benefits to former or inactive employees (primarily those on disability) who were not deemed retired under other company plans. The projected future cost of providing these benefits is expensed over the period employees earn such benefits.

Earnings Per Share   Although basic earnings per share only considers shares of common stock outstanding during the period, the calculation of diluted earnings per share includes the following adjustments to weighted average common shares related to stock-based compensation plans: 2017 – 2.0 million, 2016 – 1.6 million and 2015 – 1.8 million.

AFG’s weighted average diluted shares outstanding excludes the following anti-dilutive potential common shares related to stock compensation plans: 2017 – none, 2016 – 0.4 million and 2015 – 1.1 million. Adjustments to net earnings attributable to shareholders in the calculation of diluted earnings per share were nominal in the 2017, 2016 and 2015 periods.

Statement of Cash Flows   For cash flow purposes, “investing activities” are defined as making and collecting loans and acquiring and disposing of debt or equity instruments and property and equipment. “Financing activities” include obtaining resources from owners and providing them with a return on their investments, borrowing money and repaying amounts borrowed. Annuity receipts, surrenders, benefits and withdrawals are also reflected as financing activities. All other activities are considered “operating.” Short-term investments having original maturities of three months or less when purchased are considered to be cash equivalents for purposes of the financial statements.

Effective October 1, 2016, AFG early adopted (on a retrospective basis) ASU 2016-15, which addresses the diversity in practice in how certain cash receipts and cash payments are presented in the statement of cash flows. Among other things, this guidance requires proceeds received from the settlement of corporate-owned life insurance policies to be classified as cash inflows from investing activities and allows premiums paid for policies to be reported as cash outflows either from investing activities or operating activities. AFG has elected to show all corporate-owned life insurance activity in investing activities. Prior to adoption of this guidance, AFG accounted for these transactions as operating activities. In addition, ASU 2016-15 clarifies when distributions received from investees accounted under the equity method should be accounted for as a cash inflow from operating activities or as a cash inflow from investing activities. AFG had previously accounted for all distributions from investments accounted for under the equity method as investing activities. The new guidance solely related to the presentation of certain transactions in the statement of cash flows. Accordingly, adoption of this guidance did not impact AFG’s results of operations or financial position.

Revenue Recognition Guidance Effective in 2018 In May 2014, the FASB issued ASU 2014-09, which requires an entity to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. Revenue is recognized when (or as) the entity satisfies a performance obligation under the contract. The new guidance also updates the accounting for certain costs associated with obtaining and fulfilling contracts with customers and requires disclosures regarding the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. Revenue recognition for insurance contracts and financial instruments, which are AFG’s primary sources of revenue, is excluded from the scope of the new guidance. AFG will adopt the new guidance effective January 1, 2018. Because the new guidance would have applied to 2% of AFG’s 2017 consolidated revenues and the impact of the new guidance on the recognition of those revenues would not have been material, management does not expect the new guidance to have a material impact on AFG’s results of operations and financial position.

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Acquisitions and Sale of Businesses

12 Months Ended

Dec. 31, 2017

Business Combinations [Abstract]

Acquisitions and Sale of Businesses

Acquisitions and Sale of Businesses

Neon Lloyd’s Business   On December 29, 2017, AFG completed the sale of an indirect noncontrolling interest in Neon, its United Kingdom-based Lloyd’s insurer, to certain Neon executives for cash equal to the fair value of the interest sold as determined by a third-party valuation firm. Because AFG continues to have a controlling interest in Neon, the sale was accounted for as an equity transaction with the excess of the carrying value of the net assets attributable to the noncontrolling interest sold over the consideration received recorded as a $3 million reduction in AFG’s Capital Surplus. As discussed in Note L — “Income Taxes,” the sale of the noncontrolling interest also resulted in the recognition of a $56 million tax benefit, including a $48 million tax benefit previously deferred in the 2016 restructuring of the Neon Lloyd’s operations.

Acquisition of Noncontrolling Interest in National Interstate Corporation   On November 10, 2016, AFG acquired the 49% of National Interstate Corporation (“NATL”) not previously owned by AFG’s wholly-owned subsidiary, Great American Insurance Company for $315 million ($32.00 per share) in a merger transaction. In addition, NATL paid a one-time special cash dividend of $0.50 per share to its shareholders immediately prior to the merger closing ($5 million was paid to noncontrolling shareholders). Expenses related to the merger were approximately $10 million and were expensed as incurred.

Because NATL was already a consolidated subsidiary of AFG prior to the merger, the acquisition was accounted for as an equity transaction. As a result, the excess of the consideration paid over the carrying value of the noncontrolling interest acquired was recorded as a $137 million reduction in AFG’s Capital Surplus. In addition, the merger allowed NATL and its subsidiaries to become members of the AFG consolidated tax group, which resulted in a tax benefit of $66 million in the fourth quarter of 2016.

Sale of Long-term Care Business In December 2015, AFG completed the sale of substantially all of its run-off long-term care insurance business (which was included in the run-off long-term care and life segment) to HC2 Holdings, Inc. (“HC2”) for approximately $13 million in net proceeds. AFG may also receive up to $13 million of additional proceeds from HC2 in the future contingent upon the release of certain statutory-basis liabilities of the legal entities sold by AFG. In connection with obtaining regulatory approval for the transaction, AFG agreed to provide up to an aggregate of $35 million of capital support for the insurance companies, on an as-needed basis to maintain specified surplus levels, subject to immediate reimbursement by HC2 through a five-year capital maintenance agreement. The legal entities involved in the transaction, United Teacher Associates Insurance Company (“UTA”) and Continental General Insurance Company (“CGIC”), contained substantially all of AFG’s long-term care insurance reserves (96% as measured by net statutory reserves as of November 30, 2015), as well as smaller blocks of annuity and life insurance business. Following the sale of these subsidiaries, AFG has only a small block of long-term care insurance (1,600 policies) with approximately $39 million in reserves at December 31, 2017. AFG had ceased new sales of long-term care insurance in January 2010, but continued to accept renewal premiums on its outstanding policies, which are guaranteed renewable.

In addition to the net proceeds received at closing and the $13 million of potential additional proceeds in the future from the release of statutory liabilities, AFG received a total of $97 million in tax benefits in 2016 related to the sale through reduced estimated tax payments and a tax refund resulting from the carryback of the tax-basis capital loss. The receivables for these tax benefits were reflected in AFG’s financial statements at December 31, 2015.

Based on the status of ongoing negotiations at the end of the first quarter of 2015, management determined that the potential sale of the run-off long-term care insurance business met the GAAP “held for sale” criteria as of March 31, 2015. Accordingly, AFG recorded a $162 million pretax loss ($105 million loss after tax) in the first quarter of 2015 to establish a liability equal to the excess of the net carrying value of the assets and liabilities to be disposed over the estimated net sale proceeds. At the closing date, the loss was adjusted to $166 million ($108 million loss after tax) based on the actual proceeds received and the final carrying value of the net assets disposed. In the second quarter of 2016, AFG received additional proceeds based on the final closing balance sheet and adjusted certain accrued expense estimates associated with the sale, resulting in a $2 million pretax gain. At March 31, 2015 and at the sale date, the carrying value of the assets and liabilities disposed represented approximately 4% of both AFG’s assets and liabilities.

Under accounting guidance effective in January 2015, only disposals of components of an entity that represent a strategic shift and that have a major effect on a reporting entity’s operations and financial results are reported as discontinued operations. Due to the run-off nature of the business and the immaterial expected impact on AFG’s results of operations, the sale of AFG’s long-term care insurance business has not been reported as a discontinued operation.

The impact of the sale of the run-off long-term care insurance business is shown below (in millions):

	December 24, 2015
Net sale proceeds (*)				$	13
Assets of businesses sold:
Cash and investments	$	1,334
Recoverables from reinsurers	630
Deferred policy acquisition costs	16
Other receivables	16
Other assets	(4		)
Goodwill	2
Total assets				1,994
Liabilities of businesses sold:
Annuity benefits accumulated	261
Life, accident and health reserves	1,525
Other liabilities	7
Total liabilities				1,793
Reclassify net unrealized gain on marketable securities				22
Net assets of businesses sold				179
Loss on subsidiaries, pretax				(166		)
Tax benefit				58
Loss on subsidiaries, net of tax				$	(108	)

(*) Includes the fair value of the potential additional consideration and capital maintenance agreement and is shown net of estimated expenses.

Revenues, costs and expenses, and earnings before income taxes for the subsidiaries sold were (in millions):

	Year ended
	December 31, 2015
Life, accident and health net earned premiums:
Long-term care	$	73
Life operations	11
Net investment income	73
Realized gains (losses) on securities and other income	(11		)
Total revenues	146
Annuity benefits	8
Life, accident and health benefits:
Long-term care	91
Life operations	11
Annuity and supplemental insurance acquisition expenses	12
Other expenses	16
Total costs and expenses	138
Earnings before income taxes	$	8

Other In addition to the loss on the sale of substantially all of AFG’s run-off long-term care insurance business (discussed above), AFG recorded a $5 million pretax realized gain in the third quarter of 2015 representing an adjustment to a previously recognized realized loss on a small property and casualty subsidiary sold several years ago.

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Segments of Operations

12 Months Ended

Dec. 31, 2017

Segment Reporting [Abstract]

Segments of Operations

Segments of Operations

AFG manages its business as four segments: (i) Property and casualty insurance, (ii) Annuity, (iii) Run-off long-term care and life and (iv) Other, which includes holding company assets and costs, and the assets and operations attributable to the noncontrolling interests of the managed investment entities.

AFG reports its property and casualty insurance business in the following Specialty sub-segments: (i) Property and transportation, which includes physical damage and liability coverage for buses, trucks and recreational vehicles, inland and ocean marine, agricultural-related products and other property coverages, (ii) Specialty casualty, which includes primarily excess and surplus, general liability, executive liability, professional liability, umbrella and excess liability, specialty coverage in targeted markets, customized programs for small to mid-sized businesses and workers’ compensation insurance, and (iii) Specialty financial, which includes risk management insurance programs for leasing and financing institutions (including collateral and lender-placed mortgage property insurance), surety and fidelity products and trade credit insurance. Premiums and underwriting profit included under Other specialty represent business assumed by AFG’s internal reinsurance program from the operations that make up AFG’s other Specialty sub-segments and amortization of deferred gains on retroactive reinsurance transactions related to the sales of businesses in prior years. AFG’s annuity business markets traditional fixed and fixed-indexed annuities in the retail, financial institutions and education markets. AFG’s reportable segments and their components were determined based primarily upon similar economic characteristics, products and services.

Sales of property and casualty insurance outside of the United States represented 5% of AFG’s revenues in 2017 and 4% of AFG’s revenues in 2016 and 2015.

The following tables (in millions) show AFG’s assets, revenues and earnings before income taxes by segment and sub-segment.

	2017		2016		2015
Assets
Property and casualty insurance (a)	$	17,171	$	15,574	$	14,689
Annuity	37,179		33,409		29,865
Run-off long-term care and life	730		752		772
Other	5,578		5,337		4,511
Total assets	$	60,658	$	55,072	$	49,837

Revenues
Property and casualty insurance:
Premiums earned:
Specialty
Property and transportation	$	1,711	$	1,662	$	1,599
Specialty casualty	2,186		2,006		2,011
Specialty financial	576		557		517
Other specialty	106		103		97
Total premiums earned	4,579		4,328		4,224
Net investment income	362		350		319
Other income (b)	28		51		78
Total property and casualty insurance	4,969		4,729		4,621
Annuity:
Net investment income	1,458		1,356		1,224
Other income	103		103		98
Total annuity	1,561		1,459		1,322
Run-off long-term care and life (c)	47		49		188
Other	283		240		194
Total revenues before realized gains (losses)	6,860		6,477		6,325
Realized gains (losses) on securities	5		19		(19		)
Realized gains (losses) on subsidiaries	—		2		(161		)
Total revenues	$	6,865	$	6,498	$	6,145

(a) Not allocable to sub-segments.

(b) Includes income of $32 million (before noncontrolling interest) from the sale of an apartment property in 2016 and $66 million (before noncontrolling interest) from the sales of a hotel and an apartment property in 2015.

(c) AFG sold substantially all of its run-off long-term care insurance business in December 2015.

	2017			2016			2015
Earnings Before Income Taxes
Property and casualty insurance:
Underwriting:
Specialty
Property and transportation	$	154		$	166		$	48
Specialty casualty	104			78			146
Specialty financial	61			84			87
Other specialty	(2		)	9			14
Other lines (a)	(75		)	(101		)	(70		)
Total underwriting	242			236			225
Investment and other income, net (b)	349			341			351
Total property and casualty insurance	591			577			576
Annuity	380			368			331
Run-off long-term care and life (c)	6			2			14
Other (d)	(258		)	(181		)	(176		)
Total earnings before realized gains (losses) and income taxes	719			766			745
Realized gains (losses) on securities	5			19			(19		)
Realized gains (losses) on subsidiaries	—			2			(161		)
Total earnings before income taxes	$	724		$	787		$	565

(a) Includes special charges to increase asbestos and environmental (“A&E”) reserves of $89 million, $36 million and $67 million in 2017, 2016 and 2015, respectively. Also includes $18 million in favorable development related to the Neon exited lines recorded in connection with a reinsurance to close transaction in 2017 and a charge of $65 million related to Neon exited lines in 2016.

(b) Includes income of $32 million (before noncontrolling interest) from the sale of an apartment property in 2016 and $66 million (before noncontrolling interest) from the sales of a hotel and an apartment property in 2015.

(c) AFG sold substantially all of its run-off long-term care insurance business in December 2015.

(d) Primarily holding company interest and expenses, including losses on retirement of debt of $51 million in 2017 and $4 million in 2015, and special charges to increase A&E reserves related to AFG’s former railroad and manufacturing operations ($24 million in 2017, $5 million in 2016 and $12 million in 2015).

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Fair Value Measurements

12 Months Ended

Dec. 31, 2017

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

Accounting standards for measuring fair value are based on inputs used in estimating fair value. The three levels of the hierarchy are as follows:

Level 1 — Quoted prices for identical assets or liabilities in active markets (markets in which transactions occur with sufficient frequency and volume to provide pricing information on an ongoing basis). AFG’s Level 1 financial instruments consist primarily of publicly traded equity securities and highly liquid government bonds for which quoted market prices in active markets are available and short-term investments of managed investment entities.

Level 2 — Quoted prices for similar instruments in active markets; quoted prices for identical or similar assets or liabilities in inactive markets (markets in which there are few transactions, the prices are not current, price quotations vary substantially over time or among market makers, or in which little information is released publicly); and valuations based on other significant inputs that are observable in active markets. AFG’s Level 2 financial instruments include separate account assets, corporate and municipal fixed maturity securities, asset-backed securities, mortgage-backed securities (“MBS”) and investments of managed investment entities priced using observable inputs. Level 2 inputs include benchmark yields, reported trades, corroborated broker/dealer quotes, issuer spreads and benchmark securities. When non-binding broker quotes can be corroborated by comparison to similar securities priced using observable inputs, they are classified as Level 2.

Level 3 — Valuations derived from market valuation techniques generally consistent with those used to estimate the fair values of Level 2 financial instruments in which one or more significant inputs are unobservable or when the market for a security exhibits significantly less liquidity relative to markets supporting Level 2 fair value measurements. The unobservable inputs may include management’s own assumptions about the assumptions market participants would use based on the best information available at the valuation date. AFG’s Level 3 is comprised of financial instruments whose fair value is estimated based on non-binding broker quotes or internally developed using significant inputs not based on, or corroborated by, observable market information.

As discussed in Note A — “Accounting Policies — Managed Investment Entities,” AFG has set the carrying value of its CLO liabilities equal to the fair value of the CLO assets (which have more observable fair values) as an alternative to reporting those liabilities at separately measured fair values. As a result, the CLO liabilities are categorized within the fair value hierarchy on the same basis (proportionally) as the related CLO assets. Since the portion of the CLO liabilities allocated to Level 3 is derived from the fair value of the CLO assets, these amounts are excluded from the progression of Level 3 financial instruments.

AFG’s management is responsible for the valuation process and uses data from outside sources (including nationally recognized pricing services and broker/dealers) in establishing fair value. AFG’s internal investment professionals are a group of approximately 25 analysts whose primary responsibility is to manage AFG’s investment portfolio. These professionals monitor individual investments as well as overall industries and are active in the financial markets on a daily basis. The group is led by AFG’s chief investment officer, who reports directly to one of AFG’s Co-CEOs. Valuation techniques utilized by pricing services and prices obtained from external sources are reviewed by AFG’s internal investment professionals who are familiar with the securities being priced and the markets in which they trade to ensure the fair value determination is representative of an exit price. To validate the appropriateness of the prices obtained, these investment managers consider widely published indices (as benchmarks), recent trades, changes in interest rates, general economic conditions and the credit quality of the specific issuers. In addition, the Company communicates directly with the pricing services regarding the methods and assumptions used in pricing, including verifying, on a test basis, the inputs used by the service to value specific securities.

Assets and liabilities measured and carried at fair value in the financial statements are summarized below (in millions):

	Level 1		Level 2			Level 3		Total
December 31, 2017
Assets:
Available for sale (“AFS”) fixed maturities:
U.S. Government and government agencies	$	122	$	112		$	8	$	242
States, municipalities and political subdivisions	—		6,975			148		7,123
Foreign government	—		127			—		127
Residential MBS	—		3,105			122		3,227
Commercial MBS	—		926			36		962
Asset-backed securities (“ABS”)	—		7,218			744		7,962
Corporate and other	30		17,662			1,044		18,736
Total AFS fixed maturities	152		36,125			2,102		38,379
Trading fixed maturities	44		304			—		348
Equity securities — AFS and trading	1,411		86			165		1,662
Assets of managed investment entities (“MIE”)	307		4,572			23		4,902
Variable annuity assets (separate accounts) (*)	—		644			—		644
Equity index call options	—		701			—		701
Other assets — derivatives	—		—			—		—
Total assets accounted for at fair value	$	1,914	$	42,432		$	2,290	$	46,636
Liabilities:
Liabilities of managed investment entities	$	293	$	4,372		$	22	$	4,687
Derivatives in annuity benefits accumulated	—		—			2,542		2,542
Other liabilities — derivatives	—		35			—		35
Total liabilities accounted for at fair value	$	293	$	4,407		$	2,564	$	7,264
December 31, 2016
Assets:
Available for sale fixed maturities:
U.S. Government and government agencies	$	133	$	174		$	8	$	315
States, municipalities and political subdivisions	—		6,641			140		6,781
Foreign government	—		136			—		136
Residential MBS	—		3,445			190		3,635
Commercial MBS	—		1,468			25		1,493
Asset-backed securities	—		5,475			484		5,959
Corporate and other	29		15,484			712		16,225
Total AFS fixed maturities	162		32,823			1,559		34,544
Trading fixed maturities	30		329			—		359
Equity securities — AFS and trading	1,305		79			174		1,558
Assets of managed investment entities	380		4,356			29		4,765
Variable annuity assets (separate accounts) (*)	—		600			—		600
Equity index call options	—		492			—		492
Other assets — derivatives	—		1			—		1
Total assets accounted for at fair value	$	1,877	$	38,680		$	1,762	$	42,319
Liabilities:
Liabilities of managed investment entities	$	363	$	4,158		$	28	$	4,549
Derivatives in annuity benefits accumulated	—		—			1,759		1,759
Derivatives in long-term debt	—		(1		)	—		(1		)
Other liabilities — derivatives	—		30			—		30
Total liabilities accounted for at fair value	$	363	$	4,187		$	1,787	$	6,337

 (*)   Variable annuity liabilities equal the fair value of variable annuity assets.

The transfers between Level 1 and Level 2 for the years ended December 31, 2017, 2016 and 2015 are reflected in the table below at fair value as of the end of the reporting period (dollars in millions):

	Level 2 To Level 1 Transfers									Level 1 To Level 2 Transfers
	# of Transfers			Fair Value						# of Transfers			Fair Value
	2017	2016	2015	2017		2016		2015		2017	2016	2015	2017		2016		2015
Perpetual preferred stocks	4	6	5	$	23	$	35	$	19	2	7	7	$	11	$	28	$	31
Common stocks	—	3	7	—		—		80		1	2	—	—		—		—
Redeemable preferred stocks	—	—	2	—		—		11		—	—	—	—		—		—

Transfers between Level 1 and Level 2 for all periods presented were a result of increases or decreases in observable trade activity.

Approximately 5% of the total assets carried at fair value on December 31, 2017, were Level 3 assets. Approximately 79% ($1.80 billion) of the Level 3 assets were priced using non-binding broker quotes, for which there is a lack of transparency as to the inputs used to determine fair value. Details as to the quantitative inputs are neither provided by the brokers nor otherwise reasonably obtainable by AFG. Since internally developed Level 3 asset fair values represent less than 10% of AFG’s Shareholders’ Equity, any justifiable changes in unobservable inputs used to determine internally developed fair values would not have a material impact on AFG’s financial position.

The only significant Level 3 assets or liabilities carried at fair value in the financial statements that were not measured using broker quotes are the derivatives embedded in AFG’s fixed-indexed annuity liabilities, which are measured using a discounted cash flow approach and had a fair value of $2.54 billion at December 31, 2017. The following table presents information about the unobservable inputs used by management in determining fair value of these embedded derivatives. See Note F — “Derivatives.”

Unobservable Input	Range
Adjustment for insurance subsidiary’s credit risk	0.2% – 2.0% over the risk free rate
Risk margin for uncertainty in cash flows	0.70% reduction in the discount rate
Surrenders	3% – 23% of indexed account value
Partial surrenders	2% – 10% of indexed account value
Annuitizations	0.1% – 1% of indexed account value
Deaths	1.6% – 8.0% of indexed account value
Budgeted option costs	2.4% – 3.6% of indexed account value

The range of adjustments for insurance subsidiary’s credit risk reflects credit spread variations across the yield curve. The range of projected surrender rates reflects the specific surrender charges and other features of AFG’s individual fixed-indexed annuity products with an expected range of 6% to 10% in the majority of future calendar years (3% to 23% over all periods). Increasing the budgeted option cost or risk margin for uncertainty in cash flow assumptions in the table above would increase the fair value of the fixed-indexed annuity embedded derivatives, while increasing any of the other unobservable inputs in the table above would decrease the fair value of the embedded derivatives.

Changes in balances of Level 3 financial assets and liabilities carried at fair value during 2017, 2016 and 2015 are presented below (in millions). The transfers into and out of Level 3 were due to changes in the availability of market observable inputs. All transfers are reflected in the table at fair value as of the end of the reporting period.

				Total realized/unrealized gains (losses) included in
	Balance at December 31, 2016			Net earnings			Other comprehensive income (loss)		Purchases and issuances			Sales and settlements			Transfer into Level 3		Transfer out of Level 3			Balance at December 31, 2017
AFS fixed maturities:
U.S. government agency	$	8		$	—		$	—	$	—		$	—		$	—	$	—		$	8
State and municipal	140			—			2		—			(2		)	10		(2		)	148
Residential MBS	190			(4		)	2		1			(40		)	44		(71		)	122
Commercial MBS	25			2			—		15			(10		)	4		—			36
Asset-backed securities	484			—			1		410			(132		)	202		(221		)	744
Corporate and other	712			(5		)	2		606			(237		)	29		(63		)	1,044
Total AFS fixed maturities	1,559			(7		)	7		1,032			(421		)	289		(357		)	2,102
Equity securities	174			(21		)	10		38			(16		)	—		(20		)	165
Assets of MIE	29			(11		)	—		9			—			—		(4		)	23
Total Level 3 assets	$	1,762		$	(39	)	$	17	$	1,079		$	(437	)	$	289	$	(381	)	$	2,290
Embedded derivatives (a)	$	(1,759	)	$	(589	)	$	—	$	(300	)	$	106		$	—	$	—		$	(2,542	)
Total Level 3 liabilities (b)	$	(1,759	)	$	(589	)	$	—	$	(300	)	$	106		$	—	$	—		$	(2,542	)

(a) Total realized/unrealized gains (losses) included in net earnings for the embedded derivatives reflects losses related to the unlocking of actuarial assumptions of $25 million in 2017.

(b) As previously discussed, these tables exclude the portion of MIE liabilities allocated to Level 3, which are derived from the fair value of the MIE assets.

				Total realized/unrealized gains (losses) included in
	Balance at December 31, 2015			Net earnings			Other comprehensive income (loss)			Purchases and issuances			Sales and settlements			Transfer into Level 3		Transfer out of Level 3			Balance at December 31, 2016
AFS fixed maturities:
U.S. government agency	$	15		$	(8	)	$	1		$	—		$	—		$	—	$	—		$	8
State and municipal	89			—			(4		)	57			(2		)	—		—			140
Residential MBS	224			(4		)	(2		)	8			(28		)	34		(42		)	190
Commercial MBS	39			(1		)	—			—			(7		)	—		(6		)	25
Asset-backed securities	470			(1		)	1			50			(52		)	60		(44		)	484
Corporate and other	633			—			(10		)	176			(100		)	30		(17		)	712
Total AFS fixed maturities	1,470			(14		)	(14		)	291			(189		)	124		(109		)	1,559
Equity securities	140			(12		)	35			44			(28		)	15		(20		)	174
Assets of MIE	26			(9		)	—			12			—			—		—			29
Total Level 3 assets	$	1,636		$	(35	)	$	21		$	347		$	(217	)	$	139	$	(129	)	$	1,762
Embedded derivatives (a)	$	(1,369	)	$	(211	)	$	—		$	(277	)	$	98		$	—	$	—		$	(1,759	)
Total Level 3 liabilities (b)	$	(1,369	)	$	(211	)	$	—		$	(277	)	$	98		$	—	$	—		$	(1,759	)

(a) Total realized/unrealized gains (losses) included in net earnings for the embedded derivatives reflects losses related to the unlocking of actuarial assumptions of $17 million in 2016.

(b) As previously discussed, these tables exclude the portion of MIE liabilities allocated to Level 3, which are derived from the fair value of the MIE assets.

						Total realized/unrealized gains (losses) included in
	Bal. at Dec. 31, 2014			Impact of accounting change (b)		Net earnings			Other comprehensive income (loss)			Purchases and issuances			Sales and settlements			Transfer into Level 3		Transfer out of Level 3			Sale of subsidiaries			Bal. at Dec. 31, 2015
AFS fixed maturities:
U.S. government agency	$	15		$	—	$	—		$	—		$	—		$	—		$	—	$	—		$	—		$	15
State and municipal	100			—		—			(1		)	34			(1		)	2		(39		)	(6		)	89
Residential MBS	300			—		(11		)	(1		)	—			(34		)	86		(88		)	(28		)	224
Commercial MBS	44			—		(1		)	(1		)	—			(2		)	4		(1		)	(4		)	39
Asset-backed securities	226			—		1			(7		)	265			(56		)	53		(10		)	(2		)	470
Corporate and other	546			—		(5		)	(9		)	161			(90		)	41		(5		)	(6		)	633
Total AFS fixed maturities	1,231			—		(16		)	(19		)	460			(183		)	186		(143		)	(46		)	1,470
Equity securities	93			—		(4		)	(9		)	77			—			—		(17		)	—			140
Assets of MIE	31			—		(11		)	—			6			—			—		—			—			26
Total Level 3 assets	$	1,355		$	—	$	(31	)	$	(28	)	$	543		$	(183	)	$	186	$	(160	)	$	(46	)	$	1,636
Liabilities of MIE	$	(2,701	)	$	2,701	$	—		$	—		$	—		$	—		$	—	$	—		$	—		$	—
Embedded derivatives (a)	(1,160		)	—		(17		)	—			(257		)	65			—		—			—			(1,369		)
Total Level 3 liabilities	$	(3,861	)	$	2,701	$	(17	)	$	—		$	(257	)	$	65		$	—	$	—		$	—		$	(1,369	)

(a) Total realized/unrealized gains (losses) included in net earnings for the embedded derivatives reflects losses related to the unlocking of actuarial assumptions of $28 million in 2015.

(b) The impact of implementing new guidance adopted in 2015, as discussed in Note A — “Accounting Policies — Managed Investment Entities.”

Fair Value of Financial Instruments   The carrying value and fair value of financial instruments that are not carried at fair value in the financial statements at December 31 are summarized below (in millions):

	Carrying		Fair Value
	Value		Total		Level 1		Level 2		Level 3
2017
Financial assets:
Cash and cash equivalents	$	2,338	$	2,338	$	2,338	$	—	$	—
Mortgage loans	1,125		1,119		—		—		1,119
Policy loans	184		184		—		—		184
Total financial assets not accounted for at fair value	$	3,647	$	3,641	$	2,338	$	—	$	1,303
Financial liabilities:
Annuity benefits accumulated (*)	$	33,110	$	32,461	$	—	$	—	$	32,461
Long-term debt	1,301		1,354		—		1,351		3
Total financial liabilities not accounted for at fair value	$	34,411	$	33,815	$	—	$	1,351	$	32,464
2016
Financial assets:
Cash and cash equivalents	$	2,107	$	2,107	$	2,107	$	—	$	—
Mortgage loans	1,147		1,146		—		—		1,146
Policy loans	192		192		—		—		192
Total financial assets not accounted for at fair value	$	3,446	$	3,445	$	2,107	$	—	$	1,338
Financial liabilities:
Annuity benefits accumulated (*)	$	29,703	$	28,932	$	—	$	—	$	28,932
Long-term debt	1,284		1,356		—		1,353		3
Total financial liabilities not accounted for at fair value	$	30,987	$	30,288	$	—	$	1,353	$	28,935

(*) Excludes $206 million and $204 million of life contingent annuities in the payout phase at December 31, 2017 and 2016, respectively.

The carrying amount of cash and cash equivalents approximates fair value. Fair values for mortgage loans are estimated by discounting the future contractual cash flows using the current rates at which similar loans would be made to borrowers with similar credit ratings. The fair value of policy loans is estimated to approximate carrying value; policy loans have no defined maturity dates and are inseparable from insurance contracts. The fair value of annuity benefits was estimated based on expected cash flows discounted using forward interest rates adjusted for the Company’s credit risk and includes the impact of maintenance expenses and capital costs. Fair values of long-term debt are based primarily on quoted market prices.

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Investments

12 Months Ended

Dec. 31, 2017

Investments, Debt and Equity Securities [Abstract]

Investments

Investments

Available for sale fixed maturities and equity securities at December 31 consisted of the following (in millions):

	2017												2016
	Amortized Cost		Gross Unrealized					Net Unrealized			Fair Value		Amortized Cost		Gross Unrealized					Net Unrealized			Fair Value
			Gains		Losses										Gains		Losses
Fixed maturities:
U.S. Government and government agencies	$	244	$	1	$	(3	)	$	(2	)	$	242	$	315	$	3	$	(3	)	$	—		$	315
States, municipalities and political subdivisions	6,887		254		(18		)	236			7,123		6,650		200		(69		)	131			6,781
Foreign government	124		3		—			3			127		131		5		—			5			136
Residential MBS	2,884		349		(6		)	343			3,227		3,367		281		(13		)	268			3,635
Commercial MBS	927		36		(1		)	35			962		1,446		49		(2		)	47			1,493
Asset-backed securities	7,836		142		(16		)	126			7,962		5,962		43		(46		)	(3		)	5,959
Corporate and other	18,136		638		(38		)	600			18,736		15,864		473		(112		)	361			16,225
Total fixed maturities	$	37,038	$	1,423	$	(82	)	$	1,341		$	38,379	$	33,735	$	1,054	$	(245	)	$	809		$	34,544
Equity Securities:
Common stocks	$	786	$	263	$	(22	)	$	241		$	1,027	$	879	$	160	$	(23	)	$	137		$	1,016
Perpetual preferred stocks	535		39		(1		)	38			573		472		21		(7		)	14			486
Total equity securities	$	1,321	$	302	$	(23	)	$	279		$	1,600	$	1,351	$	181	$	(30	)	$	151		$	1,502

The non-credit related portion of other-than-temporary impairment charges is included in other comprehensive income. Cumulative non-credit charges taken for securities still owned at December 31, 2017 and December 31, 2016, respectively, were $158 million and $189 million. Gross unrealized gains on such securities at December 31, 2017 and December 31, 2016 were $137 million and $130 million, respectively. Gross unrealized losses on such securities at December 31, 2017 and December 31, 2016 were $4 million and $3 million, respectively. These amounts represent the non-credit other-than-temporary impairment charges recorded in AOCI adjusted for subsequent changes in fair values and relate primarily to residential MBS.

The following tables show gross unrealized losses (dollars in millions) on available for sale fixed maturities and equity securities by investment category and length of time that individual securities have been in a continuous unrealized loss position at December 31, 2017 and 2016.

	Less Than Twelve Months							Twelve Months or More
	Unrealized Loss			Fair Value		Fair Value as % of Cost		Unrealized Loss			Fair Value		Fair Value as % of Cost
2017
Fixed maturities:
U.S. Government and government agencies	$	—		$	55	100	%	$	(3	)	$	123	98	%
States, municipalities and political subdivisions	(8		)	825		99	%	(10		)	431		98	%
Foreign government	—			4		100	%	—			—		—	%
Residential MBS	(1		)	118		99	%	(5		)	118		96	%
Commercial MBS	(1		)	67		99	%	—			—		—	%
Asset-backed securities	(7		)	1,195		99	%	(9		)	299		97	%
Corporate and other	(20		)	2,031		99	%	(18		)	603		97	%
Total fixed maturities	$	(37	)	$	4,295	99	%	$	(45	)	$	1,574	97	%
Equity securities:
Common stocks	$	(22	)	$	117	84	%	$	—		$	—	—	%
Perpetual preferred stocks	—			41		100	%	(1		)	13		93	%
Total equity securities	$	(22	)	$	158	88	%	$	(1	)	$	13	93	%
2016
Fixed maturities:
U.S. Government and government agencies	$	(1	)	$	153	99	%	$	(2	)	$	8	80	%
States, municipalities and political subdivisions	(64		)	2,289		97	%	(5		)	44		90	%
Residential MBS	(7		)	502		99	%	(6		)	162		96	%
Commercial MBS	(2		)	121		98	%	—			—		—	%
Asset-backed securities	(29		)	1,737		98	%	(17		)	634		97	%
Corporate and other	(93		)	3,849		98	%	(19		)	312		94	%
Total fixed maturities	$	(196	)	$	8,651	98	%	$	(49	)	$	1,160	96	%
Equity securities:
Common stocks	$	(23	)	$	215	90	%	$	—		$	—	—	%
Perpetual preferred stocks	(6		)	135		96	%	(1		)	6		86	%
Total equity securities	$	(29	)	$	350	92	%	$	(1	)	$	6	86	%

At December 31, 2017, the gross unrealized losses on fixed maturities of $82 million relate to 841 securities. Investment grade securities (as determined by nationally recognized rating agencies) represented approximately 78% of the gross unrealized loss and 90% of the fair value.

The determination of whether unrealized losses are “other-than-temporary” requires judgment based on subjective as well as objective factors.Factors considered and resources used by management include:

a) whether the unrealized loss is credit-driven or a result of changes in market interest rates,

b) the extent to which fair value is less than cost basis,

c) cash flow projections received from independent sources,

d) historical operating, balance sheet and cash flow data contained in issuer SEC filings and news releases,

e) near-term prospects for improvement in the issuer and/or its industry,

f) third party research and communications with industry specialists,

g) financial models and forecasts,

h) the continuity of dividend payments, maintenance of investment grade ratings and hybrid nature of certain investments,

i) discussions with issuer management, and

j) ability and intent to hold the investment for a period of time sufficient to allow for anticipated recovery in fair value.

AFG analyzes its MBS securities for other-than-temporary impairment each quarter based upon expected future cash flows. Management estimates expected future cash flows based upon its knowledge of the MBS market, cash flow projections (which reflect loan to collateral values, subordination, vintage and geographic concentration) received from independent sources, implied cash flows inherent in security ratings and analysis of historical payment data. During 2017, AFG recorded $1 million in other-than-temporary impairment charges related to its residential MBS.

In 2017, AFG recorded approximately $19 million and $4 million in other-than-temporary impairment charges related to other fixed maturities (other than residential MBS securities) and other investments, respectively.

AFG recorded $55 million in other-than-temporary impairment charges on common stocks in 2017. At December 31, 2017, the gross unrealized losses on common stocks of $22 million relate to 16 securities, none of which has been in an unrealized loss position for more than 12 months.

AFG recorded $9 million in other-than-temporary impairment charges on preferred stock in 2017. At December 31, 2017, the gross unrealized losses on preferred stocks of $1 million relate to 7 securities. Three preferred stocks have been in an unrealized loss position for 12 months or more and all are investment grade rated.

Management believes AFG will recover its cost basis in the securities with unrealized losses and that AFG has the ability to hold the securities until they recover in value and had no intent to sell them at December 31, 2017. As discussed in Note A — “Accounting Policies — Investments,” effective January 1, 2018, all equity securities currently classified as “available for sale” will be required to be carried at fair value through net earnings instead of accumulated other comprehensive income and will therefore no longer be evaluated for other-than-temporary impairment.

A progression of the credit portion of other-than-temporary impairments on fixed maturity securities for which the non-credit portion of an impairment has been recognized in other comprehensive income is shown below (in millions):

	2017			2016			2015
Balance at January 1	$	153		$	160		$	170
Additional credit impairments on:
Previously impaired securities	1			2			1
Securities without prior impairments	3			1			2
Reductions due to:
Sales or redemptions	(12		)	(10		)	(9		)
Sale of subsidiaries	—			—			(4		)
Balance at December 31	$	145		$	153		$	160

The table below sets forth the scheduled maturities of available for sale fixed maturities as of December 31, 2017 (dollars in millions). Securities with sinking funds are reported at average maturity. Actual maturities may differ from contractual maturities because certain securities may be called or prepaid by the issuers.

	Amortized		Fair Value
	Cost		Amount		%
Maturity
One year or less	$	746	$	759	2	%
After one year through five years	6,730		6,939		18	%
After five years through ten years	13,235		13,662		35	%
After ten years	4,680		4,868		13	%
	25,391		26,228		68	%
ABS (average life of approximately 5 years)	7,836		7,962		21	%
MBS (average life of approximately 4.5 years)	3,811		4,189		11	%
Total	$	37,038	$	38,379	100	%

Certain risks are inherent in fixed maturity securities, including loss upon default, price volatility in reaction to changes in interest rates, and general market factors and risks associated with reinvestment of proceeds due to prepayments or redemptions in a period of declining interest rates.

There were no investments in individual issuers that exceeded 10% of shareholders’ equity at December 31, 2017 or 2016.

Net Unrealized Gain on Marketable Securities In addition to adjusting fixed maturity securities and equity securities classified as “available for sale” to fair value, GAAP requires that deferred policy acquisition costs and certain other balance sheet amounts related to annuity, long-term care and life businesses be adjusted to the extent that unrealized gains and losses from securities would result in adjustments to those balances had the unrealized gains or losses actually been realized. The following table shows (in millions) the components of the net unrealized gain on securities that is included in AOCI in AFG’s Balance Sheet.

	Pretax			Deferred Tax			Net
December 31, 2017
Net unrealized gain on:
Fixed maturities — annuity segment (a)	$	1,082		$	(227	)	$	855
Fixed maturities — all other	259			(55		)	204
Total fixed maturities	1,341			(282		)	1,059
Equity securities (b)	279			(58		)	221
Total investments	1,620			(340		)	1,280
Deferred policy acquisition costs — annuity segment	(433		)	91			(342		)
Annuity benefits accumulated	(137		)	29			(108		)
Unearned revenue	13			(3		)	10
Total net unrealized gain on marketable securities	$	1,063		$	(223	)	$	840
December 31, 2016
Net unrealized gain on:
Fixed maturities — annuity segment (a)	$	640		$	(224	)	$	416
Fixed maturities — all other	169			(59		)	110
Total fixed maturities	809			(283		)	526
Equity securities (b)	151			(53		)	98
Total investments	960			(336		)	624
Deferred policy acquisition costs — annuity segment	(273		)	96			(177		)
Annuity benefits accumulated	(78		)	27			(51		)
Unearned revenue	13			(5		)	8
Total net unrealized gain on marketable securities	$	622		$	(218	)	$	404

(a) Net unrealized gains on fixed maturity investments supporting AFG’s annuity benefits accumulated.

(b) As discussed in Note A — “Accounting Policies — Investments,” effective January 1, 2018, all equity securities currently classified as “available for sale” will be required to be carried at fair value through net earnings instead of AOCI.

Real Estate and Other Investments Real estate and other investments on AFG’s Balance Sheet includes the following at December 31 (in millions):

	2017		2016
Limited partnerships and similar investments accounted for using the equity method	$	999	$	688
Directly owned real estate	164		197
Other investments	148		149
Total real estate and other investments	$	1,311	$	1,034

Net Investment Income   The following table shows (in millions) investment income earned and investment expenses incurred.

	2017			2016			2015
Investment income:
Fixed maturities	$	1,607		$	1,510		$	1,461
Equity securities	79			81			76
Equity in earnings of partnerships and similar investments	64			44			27
Other	102			81			87
Gross investment income	1,852			1,716			1,651
Investment expenses	(21		)	(20		)	(18		)
Net investment income	$	1,831		$	1,696		$	1,633

Realized gains (losses) and changes in unrealized appreciation (depreciation) related to fixed maturity and equity security investments are summarized as follows (in millions):

	2017												2016
	Realized gains (losses)												Realized gains (losses)
	Before Impairments			Impairments			Total			Change in Unrealized			Before Impairments			Impairments			Total			Change in Unrealized
Fixed maturities	$	17		$	(20	)	$	(3	)	$	532		$	36		$	(38	)	$	(2	)	$	90
Equity securities	70			(64		)	6			128			106			(93		)	13			67
Mortgage loans and other investments	(6		)	(4		)	(10		)	—			—			—			—			—
Other (*)	(3		)	15			12			(219		)	(7		)	15			8			(52		)
Total pretax	78			(73		)	5			441			135			(116		)	19			105
Tax effects	(27		)	25			(2		)	(5		)	(48		)	41			(7		)	(37		)
Noncontrolling interests	—			—			—			—			(2		)	3			1			4
Net of tax and noncontrolling interests	$	51		$	(48	)	$	3		$	436		$	85		$	(72	)	$	13		$	72

	2015
	Realized gains (losses)
	Before Impairments			Impairments			Total			Change in Unrealized
Fixed maturities	$	19		$	(43	)	$	(24	)	$	(941	)
Equity securities	94			(94		)	—			(134		)
Mortgage loans and other investments	(2		)	(3		)	(5		)	—
Other (*)	(5		)	15			10			430
Total pretax	106			(125		)	(19		)	(645		)
Tax effects	(38		)	45			7			226
Noncontrolling interests	(2		)	2			—			8
Net of tax and noncontrolling interests	$	66		$	(78	)	$	(12	)	$	(411	)

(*) Primarily adjustments to deferred policy acquisition costs and reserves related to the annuity business.

Gross realized gains and losses (excluding impairment write-downs and mark-to-market of derivatives) on available for sale fixed maturity and equity security investment transactions consisted of the following (in millions):

	2017			2016			2015
Fixed maturities:
Gross gains	$	43		$	55		$	38
Gross losses	(20		)	(10		)	(7		)
Equity securities:
Gross gains	87			110			99
Gross losses	(17		)	(4		)	(5		)

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Derivatives

12 Months Ended

Dec. 31, 2017

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivatives

Derivatives

As discussed under “Derivatives” in Note A— “Accounting Policies,” AFG uses derivatives in certain areas of its operations.

Derivatives That Do Not Qualify for Hedge Accounting   The following derivatives that do not qualify for hedge accounting under GAAP are included in AFG’s Balance Sheet at fair value (in millions):

		December 31, 2017				December 31, 2016
Derivative	Balance Sheet Line	Asset		Liability		Asset		Liability
MBS with embedded derivatives	Fixed maturities	$	105	$	—	$	107	$	—
Public company warrants	Equity securities	4		—		4		—
Fixed-indexed annuities (embedded derivative)	Annuity benefits accumulated	—		2,542		—		1,759
Equity index call options	Equity index call options	701		—		492		—
Reinsurance contract (embedded derivative)	Other liabilities	—		4		—		8
		$	810	$	2,546	$	603	$	1,767

The MBS with embedded derivatives consist primarily of interest-only MBS with interest rates that float inversely with short-term rates. AFG records the entire change in the fair value of these securities in earnings. These investments are part of AFG’s overall investment strategy and represent a small component of AFG’s overall investment portfolio.

Warrants to purchase shares of publicly traded companies, which represent a small component of AFG’s overall investment portfolio, are considered to be derivatives that are required to be carried at fair value through earnings.

AFG’s fixed-indexed annuities provide policyholders with a crediting rate tied, in part, to the performance of an existing stock market or other financial index. AFG attempts to mitigate the risk in the index-based component of these products through the purchase of call options on the appropriate index. AFG receives collateral from certain of its counterparties to support its purchased call option assets. This collateral ($389 million at December 31, 2017 and $380 million at December 31, 2016) is included in other assets in AFG’s Balance Sheet with an offsetting liability to return the collateral, which is included in other liabilities. AFG’s strategy is designed so that the change in the fair value of the call option assets will generally offset the economic change in the liabilities from the index participation. Both the index-based component of the annuities and the related call options are considered derivatives. Fluctuations in interest rates and the stock market, among other factors, can cause volatility in the periodic measurement of fair value of the embedded derivative that management believes can be inconsistent with the long-term economics of these products.

As discussed under “Reinsurance” in Note A, AFG has a reinsurance contract that is considered to contain an embedded derivative.

The following table summarizes the gain (loss) included in AFG’s Statement of Earnings for changes in the fair value of derivatives that do not qualify for hedge accounting for 2017, 2016 and 2015 (in millions):

Derivative	Statement of Earnings Line	2017			2016			2015
MBS with embedded derivatives	Realized gains (losses) on securities	$	(6	)	$	(9	)	$	(16	)
Public company warrants	Realized gains (losses) on securities	—			—			—
Fixed-indexed annuities (embedded derivative) (*)	Annuity benefits	(589		)	(211		)	(17		)
Equity index call options	Annuity benefits	494			141			(56		)
Reinsurance contracts (embedded derivative)	Net investment income	(2		)	(1		)	6
		$	(103	)	$	(80	)	$	(83	)

(*) The change in fair value of the embedded derivative includes losses related to unlocking of actuarial assumptions of $25 million in 2017 compared to $17 million in 2016 and $28 million in 2015.

Derivatives Designated and Qualifying as Cash Flow Hedges   As of December 31, 2017, AFG has entered into ten interest rate swaps that are designated and qualify as highly effective cash flow hedges to mitigate interest rate risk related to certain floating-rate securities included in AFG’s portfolio of fixed maturity securities. The purpose of each of these swaps is to effectively convert a portion of AFG’s floating-rate fixed maturity securities to fixed rates by offsetting the variability in cash flows attributable to changes in short-term LIBOR.

Under the terms of the swaps, AFG receives fixed-rate interest payments in exchange for variable interest payments based on short-term LIBOR. The notional amounts of the interest rate swaps generally decline over each swap’s respective life (the swaps expire between August 2019 and June 2030) in anticipation of the expected decline in AFG’s portfolio of fixed maturity securities with floating interest rates based on short-term LIBOR. The total outstanding notional amount of AFG’s interest rate swaps increased to $1.58 billion at December 31, 2017 compared to $1.08 billion at December 31, 2016, reflecting three new swaps with an aggregate notional amount at issuance of $663 million entered into in 2017, partially offset by the scheduled amortization discussed above. The fair value of the effective portion of the interest rate swaps in an asset position and included in other assets was less than $1 million at December 31, 2017 and $1 million at December 31, 2016. The fair value of the effective portion of interest rate swaps in a liability position and included in other liabilities was $31 million at December 31, 2017 and $22 million at December 31, 2016. The net unrealized gain or loss on cash flow hedges is included in AOCI, net of DPAC and deferred taxes. Amounts reclassified from AOCI (before DPAC and taxes) to net investment income were $6 million in 2017, $7 million in 2016 and $6 million in 2015. There was no ineffectiveness recorded in net earnings during these periods. A collateral receivable supporting these swaps of $70 million at December 31, 2017 and $60 million at December 31, 2016 is included in other assets in AFG’s Balance Sheet.

Derivative Designated and Qualifying as a Fair Value Hedge   In June 2015, AFG entered into an interest rate swap to mitigate the interest rate risk associated with its fixed-rate 9-7/8% Senior Notes due June 2019 by effectively converting the interest rate on those notes to a floating rate of three-month LIBOR plus 8.099%. In connection with redemption of the 9-7/8% Senior Notes in December 2017, AFG paid the counterparty $1 million to settle the interest rate swap.

Since the terms of the interest rate swap matched the terms of the hedged debt, changes in the fair value of the interest rate swap were offset by changes in the fair value of the hedged debt attributable to changes in interest rates. The fair value of the interest rate swap (asset of $1 million at December 31, 2016) and the offsetting adjustment to the carrying value of the 9-7/8% Senior Notes were both included in long-term debt on AFG’s Balance Sheet. Accordingly, the net impact on AFG’s earnings during the period that the swap was outstanding was that the interest expense associated with the hedged debt was effectively recorded at the floating rate. The net reduction in interest expense from the swap for 2017, 2016 and 2015 was $2 million, $3 million and $2 million, respectively.

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Deferred Policy Acquisition Costs

12 Months Ended

Dec. 31, 2017

Deferred Policy Acquisition Costs Disclosures [Abstract]

Deferred Policy Acquisition Costs

Deferred Policy Acquisition Costs

A progression of deferred policy acquisition costs is presented below (in millions):

	P&C			Annuity and Run-off Long-term Care and Life
	Deferred			Deferred			Sales															Consolidated
	Costs			Costs			Inducements			PVFP			Subtotal			Unrealized (*)			Total			Total
Balance at December 31, 2014	$	221		$	925		$	132		$	74		$	1,131		$	(531	)	$	600		$	821
Additions	519			224			11			—			235			—			235			754
Amortization:
Periodic amortization	(511		)	(162		)	(26		)	(11		)	(199		)	—			(199		)	(710		)
Annuity unlocking	—			31			4			—			35			—			35			35
Included in realized gains	—			8			1			—			9			—			9			9
Sale of subsidiaries	—			(8		)	(3		)	(8		)	(19		)	—			(19		)	(19		)
Foreign currency translation	(3		)	—			—			—			—			—			—			(3		)
Change in unrealized	—			—			—			—			—			297			297			297
Balance at December 31, 2015	226			1,018			119			55			1,192			(234		)	958			1,184
Additions	535			230			9			—			239			—			239			774
Amortization:
Periodic amortization	(520		)	(169		)	(24		)	(9		)	(202		)	—			(202		)	(722		)
Annuity unlocking	—			25			4			—			29			—			29			29
Included in realized gains	—			6			2			—			8			—			8			8
Foreign currency translation	(3		)	—			—			—			—			—			—			(3		)
Change in unrealized	—			—			—			—			—			(31		)	(31		)	(31		)
Balance at December 31, 2016	238			1,110			110			46			1,266			(265		)	1,001			1,239
Additions	588			225			4			—			229			—			229			817
Amortization:
Periodic amortization	(556		)	(161		)	(19		)	(8		)	(188		)	—			(188		)	(744		)
Annuity unlocking	—			34			6			1			41			—			41			41
Included in realized gains	—			9			1			—			10			—			10			10
Foreign currency translation	—			—			—			—			—			—			—			—
Other	—			—			—			10			10			—			10			10
Change in unrealized	—			—			—			—			—			(157		)	(157		)	(157		)
Balance at December 31, 2017	$	270		$	1,217		$	102		$	49		$	1,368		$	(422	)	$	946		$	1,216

(*) Unrealized adjustments to DPAC includes net unrealized gains/losses on securities and net unrealized gains/losses on cash flow hedges.

The present value of future profits (“PVFP”) amounts in the table above are net of $141 million and $134 million of accumulated amortization at December 31, 2017 and 2016, respectively. During each of the next five years, the PVFP is expected to decrease at a rate of approximately one-eighth of the balance at the beginning of each respective year.

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Managed Investment Entities

12 Months Ended

Dec. 31, 2017

Variable Interest Entity, Primary Beneficiary, Does Not Hold Majority Voting Interest, Disclosures [Abstract]

Managed Investment Entities

Managed Investment Entities

AFG is the investment manager and its subsidiaries have investments ranging from 15.0% to 60.9% of the most subordinate debt tranche of fifteen collateralized loan obligation entities or “CLOs,” which are considered variable interest entities. AFG’s subsidiaries also own portions of the senior debt tranches of certain of these CLOs. Upon formation between 2004 and 2017, these entities issued securities in various senior and subordinate classes and invested the proceeds primarily in secured bank loans, which serve as collateral for the debt securities issued by each particular CLO. None of the collateral was purchased from AFG. AFG’s investments in the subordinate debt tranches of these entities receive residual income from the CLOs only after the CLOs pay expenses (including management fees to AFG) and interest on and returns of capital to senior levels of debt securities. There are no contractual requirements for AFG to provide additional funding for these entities. AFG has not provided and does not intend to provide any financial support to these entities.

AFG’s maximum exposure to economic loss on its CLOs is limited to its investment in the CLOs, which had an aggregate fair value of $215 million (including $130 million invested in the most subordinate tranches) at December 31, 2017, and $216 million at December 31, 2016.

In 2017, AFG formed two new CLOs, which issued an aggregate of $865 million face amount of liabilities (including $48 million face amount purchased by subsidiaries of AFG). During 2017, AFG subsidiaries also purchased $71 million face amount of senior debt and subordinate tranches of existing CLOs for $71 million. During 2017, AFG subsidiaries received $103 million in sale and redemption proceeds from its CLO investments. In 2016, AFG formed two new CLOs, which issued an aggregate of $866 million face amount of liabilities (including $64 million face amount purchased by subsidiaries of AFG). During 2016, AFG subsidiaries also purchased $24 million face amount of senior debt and subordinate tranches of existing CLOs for $17 million. During 2016, AFG subsidiaries also received $115 million in sale and redemption proceeds from its CLO investments. In 2015, AFG formed two new CLOs, which issued an aggregate of $869 million face amount of liabilities (including $81 million face amount purchased by subsidiaries of AFG). In 2017, two AFG CLOs were substantially liquidated, as permitted by the CLO indentures.

The revenues and expenses of the CLOs are separately identified in AFG’s Statement of Earnings, after the elimination of management fees and earnings attributable to shareholders of AFG as measured by the change in the fair value of AFG’s investments in the CLOs. Selected financial information related to the CLOs is shown below (in millions):

	Year ended December 31,
	2017			2016			2015
Investment in CLO tranches	$	215		$	216		$	266
Gains (losses) on change in fair value of assets/liabilities (a):
Assets	(8		)	131			(116		)
Liabilities	20			(116		)	82
Management fees paid to AFG	18			17			15
CLO earnings (losses) attributable to AFG Shareholders (b)	23			37			(6		)

(a) Included in revenues in AFG’s Statement of Earnings.

(b) Included in earnings before income taxes in AFG’s Statement of Earnings.

The aggregate unpaid principal balance of the CLOs’ fixed maturity investments exceeded the fair value of the investments by $55 million and $75 million at December 31, 2017 and 2016. The aggregate unpaid principal balance of the CLOs’ debt exceeded its carrying value by $118 million and $159 million at those dates. The CLO assets include loans with an aggregate fair value of $1 million at both December 31, 2017 and December 31, 2016, for which the CLOs are not accruing interest because the loans are in default (aggregate unpaid principal balance of $8 million and $10 million at those dates, respectively).

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Goodwill and Other Intangibles

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangibles

Goodwill and Other Intangibles

Changes in the carrying value of goodwill during 2015, 2016 and 2017, by reporting segment, are presented in the following table (in millions):

	Property and Casualty		Annuity			Total
Balance at January 1, 2015	$	168	$	33		$	201
Sale of subsidiaries in 2015	—		(2		)	(2		)
Balance at December 31, 2015, December 31, 2016 and December 31, 2017	$	168	$	31		$	199

Goodwill decreased by $2 million in the fourth quarter of 2015 due to the sale of UTA and CGIC as discussed in Note B— “Acquisitions and Sale of Businesses.”

Included in other assets in AFG’s Balance Sheet is $26 million at December 31, 2017 and $34 million at December 31, 2016 of amortizable intangible assets related to property and casualty insurance acquisitions. These amounts are net of accumulated amortization of $30 million and $25 million, respectively. Amortization of intangibles was $8 million in each of 2017, 2016 and 2015. Future amortization of intangibles (weighted average amortization period of 3 years) is estimated to be $8 million per year in each of 2018 through 2020 and $2 million in 2021.

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Long-Term Debt

12 Months Ended

Dec. 31, 2017

Debt Disclosure [Abstract]

Long-Term Debt

Long-Term Debt

Long-term debt consisted of the following at December 31 (in millions):

	2017							2016
	Principal		Discount and Issue Costs			Carrying Value		Principal		Discount and Issue Costs			Carrying Value
Direct Senior Obligations of AFG:
4.50% Senior Notes due June 2047	$	590	$	(2	)	$	588	$	—	$	—		$	—
3.50% Senior Notes due August 2026	425		(5		)	420		300		(3		)	297
9-7/8% Senior Notes due June 2019	—		—			—		350		(1		)	349
6-3/8% Senior Notes due June 2042	—		—			—		230		(7		)	223
5-3/4% Senior Notes due August 2042	—		—			—		125		(4		)	121
Other	3		—			3		3		—			3
	1,018		(7		)	1,011		1,008		(15		)	993
Direct Subordinated Obligations of AFG:
6-1/4% Subordinated Debentures due September 2054	150		(5		)	145		150		(5		)	145
6% Subordinated Debentures due November 2055	150		(5		)	145		150		(5		)	145
	300		(10		)	290		300		(10		)	290
	$	1,318	$	(17	)	$	1,301	$	1,308	$	(25	)	$	1,283

At December 31, 2017, scheduled principal payments on debt for the subsequent five years and thereafter were as follows: 2018 — none; 2019 — none; 2020 — none; 2021 — none; 2022 — none and thereafter — $1.32 billion.

In June 2017, AFG issued $350 million in 4.50% Senior Notes due in 2047 at a price of 99.46%. The net proceeds of the offering were used to redeem AFG’s $230 million outstanding principal amount of 6-3/8% Senior Notes due June 2042 at par value and to redeem AFG’s $125 million outstanding principal amount of 5-3/4% Senior Notes due August 2042 at par value in June 2017 and August 2017, respectively.

In November 2017, AFG issued an additional $125 million of 3.50% Senior Notes due in 2026 at a price of 99.698% and $240 million of 4.50% Senior Notes due in 2047 at a price of 102.374%. The net proceeds of the offering were used to redeem AFG’s $350 million outstanding principal amount of 9-7/8% Senior Notes due in June 2019 for $388 million (including a make-whole premium of $38 million) in December 2017.

In August 2016, AFG issued $300 million in 3.50% Senior Notes due in 2026 at a price of 99.608%. The net proceeds of the offering were used to fund a portion of the November 2016 acquisition of the noncontrolling interest in NATL (discussed in Note B — “Acquisitions and Sale of Businesses”). At the acquisition date, the $18 million outstanding under NATL’s bank credit facility, including $6 million borrowed in September 2016, was repaid and the credit agreement was terminated.

In September 2015, AFG used cash on hand to redeem the $132 million in outstanding AFG 7% Senior Notes due September 2050 at par value. In November 2015, AFG issued $150 million in 6% Subordinated Debentures due in 2055. During 2015, subsidiaries of AFG repaid all of the outstanding notes secured by real estate.

To achieve a desired balance between fixed and variable rate debt, AFG entered into an interest rate swap in June 2015, which effectively converted its 9-7/8% Senior Notes to a floating rate of three-month LIBOR plus 8.099%. In December 2017, AFG settled the interest rate swap contemporaneously with the redemption of the 9-7/8% Senior Notes. At December 31, 2016, the fair value of the interest rate swap (asset of $1 million at that date) and the offsetting adjustment to the carrying value of the notes were both included in the carrying value of the 9-7/8% Senior Notes in the table above.

AFG can borrow up to $500 million under its revolving credit facility, which expires in June 2021. Amounts borrowed under this agreement bear interest at rates ranging from 1.00% to 1.875% (currently 1.375%) over LIBOR based on AFG’s credit rating. No amounts were borrowed under this facility at December 31, 2017 or December 31, 2016.

Cash interest payments on long-term debt were $85 million in 2017, $75 million in 2016 and 2015. In 2017, 2016 and 2015, AFG received $2 million, $3 million and $2 million, respectively, in interest under the interest rate swap discussed above.

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Shareholders' Equity

12 Months Ended

Dec. 31, 2017

Stockholders' Equity Note [Abstract]

Shareholders' Equity

Shareholders’ Equity

AFG is authorized to issue 12.5 million shares of Voting Preferred Stock and 12.5 million shares of Nonvoting Preferred Stock, each without par value.

Stock Incentive Plans   Under AFG’s stock incentive plans, employees of AFG and its subsidiaries are eligible to receive equity awards in the form of stock options, stock appreciation rights, restricted stock awards, restricted stock units and stock awards. At December 31, 2017, there were 8.0 million shares of AFG Common Stock reserved for issuance under AFG’s stock incentive plans.

The restricted Common Stock that AFG has granted generally vests over a three or four year period. Data relating to grants of restricted stock is presented below:

	Shares		Average Grant Date Fair Value
Outstanding at January 1, 2017	678,875		$	60.90
Granted	232,250		$	94.44
Vested	(145,473	)	$	48.76
Forfeited	(6,617	)	$	71.30
Outstanding at December 31, 2017	759,035		$	73.40

AFG issued 47,826 shares of Common Stock (fair value of $96.13 per share) in the first quarter of 2017 and 40,336 shares (fair value of $71.05 per share) in the first quarter of 2016 under its Equity Bonus Plan.

AFG did not grant any stock options in 2017 or 2016. Options granted in years prior to 2016 have an exercise price equal to the market price of AFG Common Stock at the date of grant. Options generally become exercisable at the rate of 20% per year commencing one year after grant and expire ten years after the date of grant.

Data for stock options issued under AFG’s stock incentive plans is presented below:

	Shares		Average Exercise Price		Average Remaining Contractual Term	Aggregate Intrinsic Value (in millions)
Outstanding at January 1, 2017	4,505,101		$	43.02
Exercised	(1,020,986	)	$	33.38
Forfeited/Cancelled	(16,775	)	$	55.82
Outstanding at December 31, 2017	3,467,340		$	45.80	4.9 years	$	218
Options exercisable at December 31, 2017	2,589,277		$	42.00	4.4 years	$	172

The total intrinsic value of options exercised during 2017, 2016 and 2015 was $65 million, $38 million and $52 million, respectively. During 2017, 2016 and 2015, AFG received $33 million, $32 million and $47 million, respectively, in cash from the exercise of stock options. The total tax benefit related to the exercises was $18 million, $11 million and $16 million (including $12 million credited directly to capital surplus in 2015) during those years, respectively.

AFG used the Black-Scholes option pricing model to calculate the fair value of its option grants issued during 2015 (no options were granted in 2016 or 2017). The expected dividend yield is based on AFG’s current dividend rate. To determine expected volatility, AFG considers its daily historical volatility as well as implied volatility on traded options. The expected term was estimated based on historical exercise patterns and post vesting cancellations. The risk-free rate for periods associated with the expected term is based upon the U.S. Treasury yield curve in effect on the grant date.

	2015
Exercise price	$	63.15
Expected dividend yield	1.6		%
Expected volatility	25		%
Expected term (in years)	7.25
Risk-free rate	1.88		%
Grant date fair value	$	15.29

Total compensation expense related to stock incentive plans of AFG and its subsidiaries for 2017, 2016 and 2015 was $30 million, $28 million and $27 million, respectively. AFG’s provision for income tax includes tax benefits of $27 million in 2017, $19 million in 2016 and $8 million in 2015 related to AFG’s stock incentive plans. The tax benefit of $27 million in 2017 and $19 million in 2016 includes $17 million and $9 million, respectively, that under the previous guidance would have been recorded directly to capital surplus. At December 31, 2017, there was $7 million and $31 million of unrecognized compensation expense related to nonvested stock options and restricted stock awards, respectively. The nonvested stock options and restricted stock awards amounts are expected to be recognized over a weighted average of 1.7 years and 2.6 years, respectively.

Accumulated Other Comprehensive Income, Net of Tax (“AOCI”)   Comprehensive income is defined as all changes in shareholders’ equity except those arising from transactions with shareholders. Comprehensive income includes net earnings and other comprehensive income, which consists primarily of changes in net unrealized gains or losses on available for sale securities. The progression of the components of accumulated other comprehensive income follows (in millions):

				Other Comprehensive Income
	AOCI Beginning Balance			Pretax			Tax			Net of tax			Attributable to noncontrolling interests			Attributable to shareholders			Other (c)			AOCI Ending Balance
Year ended December 31, 2017
Net unrealized gains on securities:
Unrealized holding gains on securities arising during the period				$	456		$	(159	)	$	297		$	—		$	297
Reclassification adjustment for realized (gains) losses included in net earnings (a)				(15		)	5			(10		)	—			(10		)
Total net unrealized gains on securities (b)	$	404		441			(154		)	287			—			287			$	149		$	840
Net unrealized losses on cash flow hedges	(7		)	(6		)	2			(4		)	—			(4		)	(2		)	(13		)
Foreign currency translation adjustments	(15		)	9			3			12			—			12			(3		)	(6		)
Pension and other postretirement plans adjustments	(7		)	1			—			1			—			1			(2		)	(8		)
Total	$	375		$	445		$	(149	)	$	296		$	—		$	296		$	142		$	813
Year ended December 31, 2016
Net unrealized gains on securities:
Unrealized holding gains on securities arising during the period				$	124		$	(44	)	$	80		$	(4	)	$	76
Reclassification adjustment for realized (gains) losses included in net earnings (a)				(19		)	7			(12		)	(1		)	(13		)
Total net unrealized gains on securities (b)	$	332		105			(37		)	68			(5		)	63			$	9		$	404
Net unrealized gains (losses) on cash flow hedges	1			(12		)	4			(8		)	—			(8		)	—			(7		)
Foreign currency translation adjustments	(22		)	6			1			7			—			7			—			(15		)
Pension and other postretirement plans adjustments	(7		)	—			—			—			—			—			—			(7		)
Total	$	304		$	99		$	(32	)	$	67		$	(5	)	$	62		$	9		$	375
Year ended December 31, 2015
Net unrealized gains (losses) on securities:
Unrealized holding losses on securities arising during the period				$	(625	)	$	219		$	(406	)	$	9		$	(397	)
Reclassification adjustment for realized (gains) losses included in net earnings (a)				14			(5		)	9			(1		)	8
Reclassification for unrealized gains of subsidiaries sold				(34		)	12			(22		)	—			(22		)
Total net unrealized gains (losses) on securities (b)	$	743		(645		)	226			(419		)	8			(411		)	$	—		$	332
Net unrealized gains on cash flow hedges	—			1			—			1			—			1			—			1
Foreign currency translation adjustments	(8		)	(9		)	(5		)	(14		)	—			(14		)	—			(22		)
Pension and other postretirement plans adjustments	(8		)	1			—			1			—			1			—			(7		)
Total	$	727		$	(652	)	$	221		$	(431	)	$	8		$	(423	)	$	—		$	304

(a)    The reclassification adjustment out of net unrealized gains on securities affected the following lines in AFG’s Statement of Earnings:

OCI component	Affected line in the statement of earnings
Pretax	Realized gains (losses) on securities
Tax	Provision for income taxes
Attributable to noncontrolling interests	Net earnings attributable to noncontrolling interests

(b) Includes net unrealized gains of $68 million at December 31, 2017 compared to net unrealized gains of $52 million and $51 million at December 31, 2016 and 2015, related to securities for which only the credit portion of an other-than-temporary impairment has been recorded in earnings.

(c) Other includes the December 2017 reclassification of $145 million stranded in AOCI from accounting for the Tax Cuts and Jobs Act of 2017 to retained earnings (see Note A — “Accounting Policies — Income Taxes”), and the impact on AOCI of the December 2017 sale of redeemable noncontrolling interests in Neon and the November 2016 acquisition of the noncontrolling interest in NATL (see Note B — “Acquisitions and Sale of Businesses”).

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Income Taxes

12 Months Ended

Dec. 31, 2017

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

The following is a reconciliation of income taxes at the statutory rate of 35% to the provision for income taxes as shown in AFG’s Statement of Earnings (dollars in millions):

	2017					2016					2015
	Amount			% of EBT		Amount			% of EBT		Amount			% of EBT
Earnings before income taxes (“EBT”)	$	724				$	787				$	565
Income taxes at statutory rate	$	253		35	%	$	275		35	%	$	198		35	%
Effect of:
Tax exempt interest	(23		)	(3	%)	(24		)	(3	%)	(27		)	(5	%)
Dividend received deduction	(8		)	(1	%)	(7		)	(1	%)	(8		)	(1	%)
Stock-based compensation	(16		)	(2	%)	(9		)	(1	%)	1			—	%
Employee stock ownership plan dividend paid deduction	(5		)	(1	%)	(2		)	—	%	(1		)	—	%
Foreign operations	21			3	%	5			—	%	3			1	%
Change in valuation allowance (excluding change in tax rate)	(7		)	(1	%)	52			7	%	23			4	%
Subsidiaries not in AFG’s tax return	—			—	%	3			—	%	2			—	%
Neon restructuring	(56		)	(8	%)	(111		)	(14	%)	—			—	%
Change in U.S corporate tax rate	83			11	%	—			—	%	—			—	%
Acquisition of noncontrolling interest in NATL	—			—	%	(66		)	(8	%)	—			—	%
Other	5			1	%	3			—	%	4			1	%
Provision for income taxes as shown in the statement of earnings	$	247		34	%	$	119		15	%	$	195		35	%

The favorable impact of stock-based compensation on AFG’s effective tax rate in the year ended December 31, 2017 reflects the high volume of employee stock option exercises during that period and the increase in the market price of AFG Common Stock.

In January 2008, AFG paid $75 million in cash to acquire approximately 67% of Neon Underwriting Limited (“Neon”, formerly known as Marketform Group Limited), a United Kingdom-based Lloyd’s insurer. During 2012, AFG acquired the then-remaining shares of Neon that it did not already own for $17 million. AFG’s investment in Neon includes the cost of acquiring the company as well as additional capital provided to Neon since the date of acquisition.

In 2011, cumulative losses at Neon across multiple lines of business resulted in uncertainty concerning the realization of the deferred tax benefits associated with the losses. Consequently, AFG began maintaining a full valuation allowance against the deferred tax assets related to the Lloyd’s insurance business in 2011.

Approximately $14 million of the $21 million impact of “foreign operations” for 2017 in the table above relates to a reduction in the “foreign underwriting losses” deferred tax asset as a result of the sale of the noncontrolling interest in Neon. Since AFG maintains a full valuation allowance against the deferred tax assets related to Neon, this reduction in deferred tax assets was offset by a corresponding reduction in the valuation allowance and had no overall impact on AFG’s income tax expense or results of operations.

The changes in valuation allowance in the table above are primarily increases in the valuation allowance on tax benefits related to losses in the Neon Lloyd’s insurance business. The $61 million decrease in the valuation allowance related to the change in the U.S. corporate tax rate is included in “Change in U.S. corporate tax rate” in table above.

In connection with the reorganization of the Neon Lloyd’s business, in December 2016, AFG undertook a restructuring that included the liquidation for tax purposes of the foreign subsidiary that is the parent of the Neon Lloyd’s operations, resulting in a taxable loss for U.S. tax purposes. AFG reported a $111 million tax benefit associated with this loss in the fourth quarter of 2016. Approximately $29 million of the $111 million tax benefit recorded in 2016 reduced current taxes payable for 2016, while the remaining tax benefit was received in 2017 from the carry-back of the tax-basis capital loss to offset capital gains in prior years. An additional loss associated with the 2016 restructuring was deferred under U.S. tax laws, resulting in an unrecognized potential tax benefit of $48 million at December 31, 2016. The sale of the noncontrolling interest in Neon resulted in the recognition of an additional tax benefit of $56 million in the fourth quarter of 2017, including the recognition of the deferred loss from the 2016 restructuring. Approximately $20 million of the $56 million tax benefit recorded in 2017 reduced current taxes payable for 2017, while the majority of the remaining tax benefit will be received in 2018 from the carry-back of the tax basis capital loss to offset capital gains in prior years.

The Tax Cuts and Jobs Act of 2017 (“TCJA”), which lowers the U.S corporate tax rate to 21% and makes other widespread changes to the U.S. tax code beginning in 2018, was enacted on December 22, 2017. Because the TCJA was enacted in December 2017, AFG recorded the $83 million decrease in its net deferred tax asset resulting from the changes in the tax code (primarily the lower corporate tax rate applicable to 2018 and future years) in the fourth quarter of 2017.

The TCJA is subject to further clarification and interpretation by the U.S. Treasury Department and the Internal Revenue Service. For example, the TCJA changes the way that companies calculate their insurance claims and reserves for tax purposes, including revaluing those tax basis liabilities as of January 1, 2018, based on a methodology and discount factors that have not been published. The resulting transitional deferred tax liability (taxes payable over eight years under the TCJA) and offsetting increase in AFG’s insurance claims and reserves deferred tax assets, were recorded at December 31, 2017 using reasonable estimates based on available information and should be considered provisional in accordance with Securities and Exchange Commission Staff Accounting Bulletin No. 118 (“SAB 118”). Because the established transition liability was completely offset by an increase in related deferred tax assets, any adjustment to the provisional amount will not impact AFG’s effective tax rate. In accordance with SAB 118, the insurance claims and reserves transitional deferred tax liability (and offsetting adjustment to the related deferred tax assets) and any other changes in deferred taxes resulting from clarification and interpretation of the TCJA provided during 2018 will be recorded in the period in which the guidance is published.

As discussed in Note B — “Acquisitions and Sale of Businesses,” AFG acquired the noncontrolling interest in NATL in November 2016. This transaction allowed NATL and its subsidiaries to become members of the AFG consolidated tax group, which resulted in a tax benefit of $66 million to AFG during the fourth quarter of 2016.

Excluding the tax benefit related to the Neon restructuring and the impact of the change in the U.S. corporate tax rate, AFG’s effective tax rate for the year ended December 31, 2017 was 31%. Excluding a $65 million charge related to the exit of certain lines of business within Neon and the tax benefits related to the acquisition of the noncontrolling interest in NATL and the Neon restructuring, AFG’s effective tax rate for the year ended December 31, 2016 was 35%.

AFG’s 2012 — 2017 tax years remain subject to examination by the IRS.

Total earnings before income taxes include losses subject to tax in foreign jurisdictions of $58 million in 2017, $160 million in 2016 and $66 million in 2015, primarily related to the Neon Lloyd’s operations.

The total income tax provision (credit) consists of (in millions):

	2017		2016			2015
Current taxes:
Federal	$	153	$	299		$	216
State	6		12			8
Deferred taxes:
Federal	5		(192		)	(29		)
Impact of change in U.S. corporate tax rate	83		—			—
Total Federal deferred taxes	88		(192		)	(29		)
Provision for income taxes	$	247	$	119		$	195

For income tax purposes, AFG and its subsidiaries had the following carryforwards available at December 31, 2017 (in millions):

	Expiring	Amount
Operating Loss – U.S.	2018 - 2022	$	130
Operating Loss – United Kingdom	indefinite	252		(*)
Capital Loss – U.S.	2022	109

(*) £186 million

Deferred income tax assets and liabilities reflect temporary differences between the carrying amounts of assets and liabilities recognized for financial reporting purposes and the amounts recognized for tax purposes. The significant components of deferred tax assets and liabilities included in AFG’s Balance Sheet at December 31 were as follows (in millions):

	2017									2016
	Excluding Unrealized Gains			Impact of Unrealized Gains			Total			Excluding Unrealized Gains			Impact of Unrealized Gains			Total
Deferred tax assets:
Federal net operating loss carryforwards	$	27		$	—		$	27		$	50		$	—		$	50
Foreign underwriting losses	80			—			80			120			—			120
Capital loss carryforwards	32			—			32			83			—			83
Insurance claims and reserves	665			29			694			774			27			801
Employee benefits	84			—			84			131			—			131
Other, net	48			(3		)	45			85			(5		)	80
Total deferred tax assets before valuation allowance	936			26			962			1,243			22			1,265
Valuation allowance against deferred tax assets	(109		)	—			(109		)	(173		)	—			(173		)
Total deferred tax assets	827			26			853			1,070			22			1,092
Deferred tax liabilities:
Investment securities	(1		)	(340		)	(341		)	29			(336		)	(307		)
Deferred policy acquisition costs	(293		)	91			(202		)	(448		)	96			(352		)
Insurance claims and reserves transition liability	(128		)	—			(128		)	—			—			—
Real estate, property and equipment	(35		)	—			(35		)	(45		)	—			(45		)
Total deferred tax liabilities	(457		)	(249		)	(706		)	(464		)	(240		)	(704		)
Net deferred tax asset (liability)	$	370		$	(223	)	$	147		$	606		$	(218	)	$	388

AFG’s net deferred tax asset at December 31, 2017 and 2016 is included in other assets in AFG’s Balance Sheet. The decrease in AFG’s net deferred tax asset at December 31, 2017 compared to December 31, 2016 reflects the impact of the change in the U.S. corporate tax rate, partially offset by higher pretax unrealized gains on securities.

The likelihood of realizing deferred tax assets is reviewed periodically; any adjustments required to the valuation allowance are made in the period during which developments requiring an adjustment become known.

“Foreign underwriting losses” in the table above include the net operating loss carryforward and other deferred tax assets related to the Neon Lloyd’s insurance business. Due to uncertainty concerning the realization of the deferred tax benefits associated with these losses, AFG maintains a full valuation allowance of $80 million against these deferred tax assets at December 31, 2017. In addition to the valuation allowance related to the Neon Lloyd’s insurance business, the gross deferred tax asset has also been reduced by a $27 million valuation allowance related to AFG’s net operating loss carryforwards (“NOL”) subject to the separate return limitation year (“SRLY”) tax rules. A SRLY NOL can be used only by the entity that created it and only in years that both it and the consolidated group have taxable income. Approximately $13 million of AFG’s SRLY NOLs expired unutilized at December 31, 2017. Since AFG maintains a full valuation allowance against its SRLY NOLs, the expiration of these loss carryforwards was offset by corresponding reduction in the valuation allowance and had no overall impact on AFG’s income tax expense or results of operations.

AFG increased its liability for uncertain tax positions by $1 million in 2015 due to uncertainty in state taxation of its surplus lines insurance subsidiaries. In 2017, this uncertainty was resolved, resulting in total tax payments of less than $1 million.

A progression of the liability for uncertain tax positions, excluding interest and penalties, follows (in millions):

	2017			2016		2015
Balance at January 1	$	1		$	1	$	—
Additions for tax positions of prior years	—			—		1
Reductions for tax positions of prior years	—			—		—
Additions for tax positions of current year	—			—		—
Settlements	(1		)	—		—
Balance at December 31	$	—		$	1	$	1

The total unrecognized tax benefits and related interest and penalties that, if recognized, would impact the effective tax rate is less than $1 million at December 31, 2017 and December 31, 2016. AFG’s provision for income taxes included a benefit of less than $1 million in 2017 and an expense of less than $1 million in 2016 and 2015 of interest (net of federal benefit or expense). AFG’s liability for interest related to unrecognized tax benefits was less than $1 million at December 31, 2017 and December 31, 2016 (net of federal benefit). AFG’s provision for income taxes in 2017 and 2016 included penalties of less than $1 million; no penalties were recorded in 2015. AFG’s liability for penalties related to unrecognized tax benefits was less than $1 million at December 31, 2017 and December 31, 2016.

Cash payments for income taxes, net of refunds, were $194 million, $308 million and $234 million for 2017, 2016 and 2015, respectively.

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Contingencies

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Contingencies

Contingencies

Establishing property and casualty insurance reserves for claims related to environmental exposures, asbestos and other mass tort claims is subject to uncertainties that are significantly greater than those presented by other types of claims. For this group of claims, traditional actuarial techniques that rely on historical loss development trends cannot be used and a range of reasonably possible losses cannot be estimated. In addition, accruals (included in other liabilities) have been recorded for various environmental and occupational injury and disease claims and other contingencies arising out of the railroad operations disposed of by American Premier’s predecessor, Penn Central Transportation Company (“PCTC”) and its subsidiaries, prior to its bankruptcy reorganization in 1978 and certain manufacturing operations disposed of by American Premier and Great American Financial Resources, Inc. (“GAFRI”).

AFG completed a comprehensive external study of its asbestos and environmental (“A&E”) exposures in the third quarter of 2017 with the aid of specialty actuarial, engineering and consulting firms and outside counsel. The study resulted in special A&E charges of $89 million for the property and casualty group and $24 million for the former railroad and manufacturing operations. AFG completed an in-depth internal review of its A&E exposures in the third quarter of 2016. The review resulted in special A&E charges of $36 million for the property and casualty group and $5 million for the former railroad and manufacturing operations. AFG completed a comprehensive external study of its A&E exposures in the third quarter of 2015 with the aid of specialty actuarial, engineering and consulting firms and outside counsel. The study resulted in special A&E charges of $67 million for the property and casualty group and $12 million for the former railroad and manufacturing operations.

The property and casualty group’s liability for A&E reserves was $528 million at December 31, 2017; related recoverables from reinsurers (net of allowances for doubtful accounts) at that date were $125 million.

At December 31, 2017, American Premier and its subsidiaries had liabilities for environmental and personal injury claims and other contingencies aggregating $81 million. The environmental claims consist of a number of proceedings and claims seeking to impose responsibility for hazardous waste remediation costs related to certain sites formerly owned or operated by the railroad and manufacturing operations. Remediation costs are difficult to estimate for a number of reasons, including the number and financial resources of other potentially responsible parties, the range of costs for remediation alternatives, changing technology and the time period over which these matters develop. The personal injury claims and other contingencies include pending and expected claims, primarily by former employees of PCTC, for injury or disease allegedly caused by exposure to excessive noise, asbestos or other substances in the workplace and other labor disputes.

At December 31, 2017, GAFRI had a liability of $8 million for environmental costs and certain other matters associated with the sales of its former manufacturing operations.

See Note B — “Acquisitions and Sale of Businesses” for a discussion of the five-year capital maintenance agreement that AFG entered into in connection with obtaining regulatory approval for the sale of substantially all of its run-off long-term care insurance business in December 2015.

While management believes AFG has recorded adequate reserves for the items discussed above, the outcome is uncertain and could result in liabilities that may vary from amounts AFG has currently recorded. Such amounts could have a material effect on AFG’s future results of operations and financial condition.

In addition, AFG and its subsidiaries are involved in litigation from time to time, generally arising in the ordinary course of business. This litigation may include, but is not limited to, general commercial disputes, lawsuits brought by policyholders, employment matters, reinsurance collection matters and actions challenging certain business practices of insurance subsidiaries. None of these matters are expected to have a material adverse impact on AFG’s results of operations or financial condition.

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Quarterly Operating Results (Unaudited)

12 Months Ended

Dec. 31, 2017

Quarterly Financial Information Disclosure [Abstract]

Quarterly Operating Results (Unaudited)

Quarterly Operating Results (Unaudited)

The operations of certain AFG business segments are seasonal in nature. While insurance premiums are recognized on a relatively level basis, claim losses related to adverse weather (snow, hail, hurricanes, severe storms, tornadoes, etc.) may be seasonal. The profitability of AFG’s crop insurance business is primarily recognized during the second half of the year as crop prices and yields are determined. Quarterly results necessarily rely heavily on estimates. These estimates and certain other factors, such as the discretionary sales of assets, cause the quarterly results not to be necessarily indicative of results for longer periods of time.

The following are quarterly results of consolidated operations for the two years ended December 31, 2017 (in millions, except per share amounts). Quarterly earnings per share do not add to year-to-date amounts due to changes in shares outstanding.

	1st Quarter		2nd Quarter		3rd Quarter		4th Quarter		Total Year
2017
Revenues	$	1,576	$	1,646	$	1,835	$	1,808	$	6,865
Net earnings, including noncontrolling interests	155		145		11		166		477
Net earnings attributable to shareholders	153		145		11		166		475
Earnings attributable to shareholders per Common Share:
Basic	$	1.76	$	1.64	$	0.13	$	1.88	$	5.40
Diluted	1.72		1.61		0.13		1.84		5.28
Average number of Common Shares:
Basic	87.2		87.8		88.1		88.2		87.8
Diluted	89.3		89.8		90.0		90.1		89.8
2016
Revenues	$	1,475	$	1,581	$	1,705	$	1,737	$	6,498
Net earnings, including noncontrolling interests	104		63		113		388		668
Net earnings attributable to shareholders	101		54		109		385		649
Earnings attributable to shareholders per Common Share:
Basic	$	1.16	$	0.63	$	1.25	$	4.43	$	7.47
Diluted	1.14		0.62		1.23		4.33		7.33
Average number of Common Shares:
Basic	86.9		86.8		86.9		86.9		86.9
Diluted	88.5		88.4		88.5		88.8		88.5

Pretax realized gains on subsidiaries and securities (including other-than-temporary impairments), favorable (adverse) prior year development of AFG’s liability for losses and loss adjustment expenses (“LAE”) and the impact of derivatives related to FIAs were as follows (in millions):

	1st Quarter			2nd Quarter			3rd Quarter			4th Quarter			Total Year
Realized Gains (Losses) on Securities and Subsidiaries
2017	$	3		$	8		$	(12	)	$	6		$	5
2016	(18		)	(14		)	2			51			21
Prior Year Development Favorable (Adverse)
2017	$	28		$	22		$	(52	)	$	66		$	64
2016	28			(28		)	(22		)	(10		)	(32		)
Impact of Derivatives related to Fixed-indexed Annuities
2017	$	(2	)	$	(16	)	$	(4	)	$	(11	)	$	(33	)
2016	(31		)	(26		)	1			29			(27		)

Adverse prior year development for the third quarters of 2017 and 2016 include pretax special charges of $89 million and $36 million, respectively, to strengthen property and casualty insurance A&E reserves. As a result of the Neon reinsurance to close agreement discussed in Note O — “Insurance,” Neon recorded $42 million in favorable development in the fourth quarter of 2017, of which $24 million related to its ongoing lines of business and $18 million related to its exited lines of business. During the second quarter of 2016, AFG recorded a pretax charge of $65 million related to Neon’s claims review of its exited lines of business, including $57 million to increase loss reserves primarily related to its medical malpractice and general liability classes.

Fixed-indexed annuities (“FIAs”) provide policyholders with a crediting rate tied, in part, to the performance of an existing stock market or other financial index. AFG attempts to mitigate the risk in the index-based component of these products through the purchase of call options on the appropriate index. AFG’s strategy is designed so that the change in the fair value of the call option assets will generally offset the economic change in the liabilities from the index participation. Both the index-based component of the annuities and the related call options are considered derivatives that must be marked-to-market through earnings each period. Fluctuations in interest rates and the stock market, among other factors, can cause volatility in the periodic measurement of fair value of the embedded derivative that management believes can be inconsistent with the long-term economics of these products. In the table above, the impact of changes in the fair value of the derivatives related to FIAs is presented net of an estimate of the related acceleration/deceleration of the amortization of deferred policy acquisition costs and deferred sales inducements.

AFG’s property and casualty operations recorded catastrophe losses totaling $140 million in 2017, including $107 million in the third quarter (primarily from Hurricanes Harvey, Irma and Maria and earthquakes in Mexico). Catastrophe losses for 2016 totaling $55 million were spread somewhat evenly across the four quarters.

Results include pretax gains (included in other income) of $13 million from the sale of a hotel in the first quarter of 2017 and$32 million from the sale of an apartment property in the second quarter of 2016.

Results for the third quarter of 2017 and 2016 include pretax special charges of $24 million and $5 million, respectively, to strengthen reserves for A&E exposures related to AFG’s former railroad and manufacturing operations.

In 2017, AFG recorded pretax losses on the retirement of debt of $7 million in the second quarter, $4 million in the third quarter and $40 million in the fourth quarter.

Net earnings in the fourth quarter of 2017 includes $56 million in tax benefits related to the Neon restructuring. Net earnings in the fourth quarter of 2016 includes $177 million in tax benefits related to the NATL merger and Neon restructuring. See Note L— “Income Taxes.”

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Insurance

12 Months Ended

Dec. 31, 2017

Insurance [Abstract]

Insurance

Insurance

Cash and securities owned by U.S.-based insurance subsidiaries, having a carrying value of approximately $1.08 billion at December 31, 2017, were on deposit as required by regulatory authorities. In addition, $205 million was on deposit in support of AFG’s underwriting activities at Lloyd’s. At December 31, 2017, AFG and its subsidiaries had $447 million in undrawn letters of credit (none of which was collateralized) supporting the underwriting capacity of its U.K.-based Lloyd’s insurer, Neon.

Property and Casualty Insurance Reserves Estimating the liability for unpaid losses and loss adjustment expenses (“LAE”) is inherently judgmental and is influenced by factors that are subject to significant variation. Determining the liability is a complex process incorporating input from many areas of the Company including actuarial, underwriting, pricing, claims and operations management.

The process used to determine the total reserve for liabilities involves estimating the ultimate incurred losses and LAE, adjusted for amounts already paid on the claims. The IBNR reserve is derived by first estimating the ultimate unpaid reserve liability and subtracting case reserves for loss and LAE.

In determining management’s best estimate of the ultimate liability, management (with the assistance of Company actuaries) considers items such as the effect of inflation on medical, hospitalization, material, repair and replacement costs, the nature and maturity of lines of insurance, general economic trends and the legal environment. In addition, historical trends adjusted for changes in underwriting standards, policy provisions, product mix and other factors are analyzed using actuarial reserve development techniques. Weighing all of the factors, the management team determines a single or “point” estimate that it records as its best estimate of the ultimate liability. Ranges of loss reserves are not developed by Company actuaries. This reserve analysis and review is completed each quarter and for almost every business within AFG’s property and casualty insurance sub-segments.

Each review includes in-depth analysis of several hundred subdivisions of the business, employing multiple actuarial techniques. For each subdivision, actuaries use informed, professional judgment to adjust these techniques as necessary to respond to specific conditions in the data or within the business.

Some of the standard actuarial methods employed for the quarterly reserve analysis may include (but may not be limited to):

• Case Incurred Development Method

• Paid Development Method

• Bornhuetter-Ferguson Method

• Incremental Paid LAE to Paid Loss Methods

Management believes that each method has particular strengths and weaknesses and that no single estimation method is most accurate in all situations. When applied to a particular group of claims, the relative strengths and weaknesses of each method can change over time based on the facts and circumstances. Ultimately, the estimation methods chosen are those which management believes produce the most reliable indication for the particular liabilities under review.

The period of time from the occurrence of a loss through the settlement of the liability is referred to as the “tail”. Generally, the same actuarial methods are considered for both short-tail and long-tail lines of business because most of them work properly for both. The methods are designed to incorporate the effects of the differing length of time to settle particular claims. For short-tail lines, management tends to give more weight to the Case Incurred and Paid Development methods, although the various methods tend to produce similar results. For long-tail lines, more judgment is involved, and more weight may be given to the Bornhuetter-Ferguson method. Liability claims for long-tail lines are more susceptible to litigation and can be significantly affected by changing contract interpretation and the legal environment. Therefore, the estimation of loss reserves for these classes is more complex and subject to a higher degree of variability.

The level of detail in which data is analyzed varies among the different lines of business. Data is generally analyzed by major product or by coverage within product, using countrywide data; however, in some situations, data may be reviewed by state or region. Appropriate segmentation of the data is determined based on data credibility, homogeneity of development patterns, mix of business, and other actuarial considerations.

Supplementary statistical information is also reviewed to determine which methods are most appropriate to use or if adjustments are needed to particular methods. Such information includes:

• Open and closed claim counts

• Average case reserves and average incurred on open claims

• Closure rates and statistics related to closed and open claim percentages

• Average closed claim severity

• Ultimate claim severity

• Reported loss ratios

• Projected ultimate loss ratios

• Loss payment patterns

Within each business, results of individual methods are reviewed, supplementary statistical information is analyzed, and data from underwriting, operating and claim management are considered in deriving management’s best estimate of the ultimate liability. This estimate may be the result of one method, a weighted average of several methods, or a judgmental selection as the management team determines is appropriate.

The liability for losses and LAE for a very limited number of claims with long-term scheduled payments under certain workers’ compensation policies has been discounted at 4.5% at both December 31, 2017 and 2016, which represents an approximation of long-term investment yields. Because of the limited amount of claims involved, the net impact of discounting did not materially impact AFG’s total liability for unpaid losses and loss adjustment expenses (net reductions from discounting of $15 million and $16 million at December 31, 2017 and 2016, respectively).

The following table provides an analysis of changes in the liability for losses and loss adjustment expenses over the past three years (in millions):

	2017			2016			2015
Balance at beginning of period	$	8,563		$	8,127		$	7,872
Less reinsurance recoverables, net of allowance	2,302			2,201			2,227
Net liability at beginning of period	6,261			5,926			5,645
Provision for losses and LAE occurring in the current year	3,019			2,730			2,662
Net increase (decrease) in the provision for claims of prior years:
Special A&E charges	89			36			67
Neon exited lines charge	(18		)	57			—
Other	(135		)	(61		)	(34		)
Total losses and LAE incurred	2,955			2,762			2,695
Payments for losses and LAE of:
Current year	(942		)	(841		)	(828		)
Prior years	(1,586		)	(1,512		)	(1,575		)
Total payments	(2,528		)	(2,353		)	(2,403		)
Reserves of businesses disposed (*)	—			(40		)	—
Foreign currency translation and other	33			(34		)	(11		)
Net liability at end of period	6,721			6,261			5,926
Add back reinsurance recoverables, net of allowance	2,957			2,302			2,201
Gross unpaid losses and LAE included in the balance sheet	$	9,678		$	8,563		$	8,127

(*) Reflects the 2016 reinsurance to close transactions at Neon (discussed below).

The net decrease in the provision for claims of prior years in 2017 reflects (i) lower than expected losses in the crop and equine businesses and lower than expected claim severity in the property and inland marine and transportation businesses (all within the Property and transportation sub-segment), (ii) favorable reserve development of $18 million on Neon’s exited lines, as well as additional favorable development on ongoing lines of business within Neon, recorded in connection with the reinsurance to close agreement entered into in December 2017 for the 2015 and prior years of account, lower than anticipated claim severity in the workers’ compensation businesses and lower than expected losses in the executive liability business (all within the Specialty casualty sub-segment) and (iii) lower than anticipated claim severity in the fidelity business and lower than expected claim frequency and severity in the surety business (both within the Specialty financial sub-segment). This favorable development was partially offset by (i) the $89 million special charge to increase asbestos and environmental reserves, (ii) higher than expected claim frequency and severity in the ocean marine business (within the Property and transportation sub-segment), (iii) higher than anticipated claim severity in the targeted markets and general liability businesses and higher than anticipated severity in New York contractor claims (all within the Specialty casualty sub-segment) and (iv) a charge to adjust to the deferred gain on the retroactive reinsurance transaction entered into in connection with the sale of businesses in 1998 (included in Other specialty sub-segment).

The net increase in the provision for claims of prior years in 2016 reflects (i) the $36 million special charge to increase asbestos and environmental reserves, (ii) reserve strengthening at National Interstate and higher than expected claim frequency in the ocean marine business (within the Property and transportation sub-segment), (iii) adverse reserve development at Neon, higher than anticipated severity in New York contractor claims, higher than anticipated claim frequency and severity in general liability insurance and higher than expected claim frequency and severity in the targeted markets business (within the Specialty casualty sub-segment) and (iv) the $57 million special charge to increase loss reserves related to Neon’s exit of its UK and international medical malpractice and general liability lines of business. This adverse development was partially offset by (i) lower than expected losses in the crop business and lower than expected claim severity in the property and inland marine and trucking businesses (all within the Property and transportation sub-segment), (ii) lower than anticipated claim frequency and severity in workers’ compensation business, lower than expected claim severity in directors and officers liability insurance and lower than expected claim frequency and severity in excess liability business (all within the Specialty casualty sub-segment) and (iii) lower than anticipated claim severity in the fidelity and crime business, lower than expected claim frequency and severity in the surety business and lower than anticipated claim frequency in the financial institutions business (within the Specialty financial sub-segment).

The net increase in the provision for claims of prior years in 2015 reflects (i) the $67 million special charge to increase asbestos and environmental reserves, (ii) higher than expected claim severity at National Interstate and higher than anticipated claim frequency in the ocean marine business (all within the Property and transportation sub-segment) and (iii) adverse reserve development at Neon (within the Specialty casualty sub-segment). This adverse development was partially offset by (i) lower than expected claim severity in the property and inland marine business, agricultural operations and a run-off book of homebuilders business (all within the Property and transportation sub-segment), (ii) lower than anticipated claim severity in workers’ compensation business, lower than anticipated claim severity and frequency in excess liability insurance and lower than expected claim severity in directors and officers liability insurance (all within the Specialty casualty sub-segment), and (iii) lower than anticipated claim frequency and severity in the surety business and products for financial institutions and lower than expected claim severity in the fidelity business and run-off collateral value insurance (all within the Specialty financial sub-segment).

In December 2017, the Neon Lloyd’s syndicate entered into a reinsurance to close transaction for the 2015 and prior years of account with StarStone Underwriting Limited, a subsidiary of Enstar Group Limited, which will be effective as of December 31, 2017. In the Lloyd’s market, a reinsurance to close transaction transfers the responsibility for discharging all of the liabilities that attach to the transferred year of account plus the right to any income due to the closing year of account in return for a premium. This transaction provides Neon with finality on its legacy business. As a result of the reinsurance to close agreement, Neon was able to better estimate its ultimate liability for the 2015 and prior years of account resulting in favorable development of $42 million, of which $24 million related to its ongoing lines of business (included in Specialty casualty) and $18 million related to its exited lines of business (discussed below and included in Neon exited lines charge). In November 2016, the Neon Lloyd’s syndicate completed a similar reinsurance to close transaction with StarStone, which covered liabilities relating to the syndicate’s 2007 and prior years of account. That transaction also included a quota share of the Italian public hospital business written in Neon’s 2008 year of account and represented Neon’s complete exit from the Italian public hospital medical malpractice business.

In May 2015, the FASB issued ASU 2015-09, Financial Services-Insurance: Disclosures about Short-Duration Contracts. The ASU requires insurance entities to disclose incurred and paid claims development information by accident year, net of reinsurance. All of AFG’s material short-duration insurance contracts are written in its property and casualty insurance segment. The development tables and the associated disclosures are aggregated in the following Specialty sub-segments: Property and transportation, Specialty casualty, Specialty financial and Other specialty. See Note C — “Segments of Operations” to the financial statements for a discussion of these sub-segments.

A reconciliation of incurred and paid claims development information to the aggregate carrying amount of the liability for unpaid losses and LAE, with separate disclosure of reinsurance recoverables on unpaid claims is shown below (in millions):

	2017
Unpaid losses and allocated LAE, net of reinsurance:
Specialty
Property and transportation	$	1,069
Specialty casualty	3,630
Specialty financial	221
Other specialty	278
Total Specialty (excluding foreign reserves)	5,198
Other reserves
Reserves for foreign operations:
Neon Lloyd’s business	480
Other subsidiaries	269
A&E reserves	403
Unallocated LAE	326
Other	45
Total other reserves	1,523
Total reserves, net of reinsurance	6,721
Add back reinsurance recoverables, net of allowance	2,957
Gross unpaid losses and LAE included in the balance sheet	$	9,678

The following claims development tables and associated disclosures related to short-duration insurance contracts are prepared by sub-segment within the property and casualty insurance business for the most recent 10 accident years. AFG determines its claim counts at the claimant or policy feature level depending on the particular facts and circumstances of the underlying claim. While the methodology is generally consistent within each sub-segment, there are minor differences between and within the sub-segments. The methods used to summarize claim counts have not changed significantly over the time periods reported in the tables below.

Property and transportation
(Dollars in Millions)
	Incurred Claims and Allocated LAE, Net of Reinsurance																				As of December 31, 2017
	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)																				Total IBNR Plus Expected Development on Reported Claims		Cumulative Number of Reported Claims
Accident Year	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017
2008	$	923	$	871	$	852	$	853	$	856	$	854	$	855	$	856	$	854	$	854	$	1	157,164
2009			526		506		523		516		511		511		508		508		508		3		140,532
2010					702		662		668		676		679		679		683		680		6		140,634
2011							830		816		831		845		856		868		865		10		140,418
2012									890		884		897		909		922		918		19		146,630
2013											911		898		902		908		910		22		142,249
2014													868		852		841		843		38		136,882
2015															842		804		798		54		135,029
2016																	771		740		110		122,112
2017																			913		273		128,455
																	Total		$	8,029

	Cumulative Paid Claims and Allocated LAE, Net of Reinsurance
Accident Year	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)
	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017		% (a)
2008	$	352	$	706	$	761	$	799	$	824	$	835	$	846	$	846	$	847	$	848	99.3	%
2009			229		348		413		456		479		493		497		499		502		98.8	%
2010					328		505		556		618		649		660		665		669		98.4	%
2011							373		679		742		787		821		840		847		97.9	%
2012									582		725		793		841		868		883		96.2	%
2013											449		721		784		831		862		94.7	%
2014													337		646		711		765		90.7	%
2015															367		595		683		85.6	%
2016																	299		534		72.2	%
2017																			387		42.4	%
																	Total		$	6,980
									Unpaid losses and LAE — years 2008 through 2017										1,049
			Unpaid losses and LAE — 11th year and prior (excluding unallocated LAE)																20
			Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)																$	1,069

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance (Supplementary Information and Unaudited)
	Year 1		Year 2		Year 3		Year 4		Year 5		Year 6		Year 7		Year 8		Year 9		Year 10
Annual	45.9	%	29.9	%	8.4	%	6.3	%	3.7	%	1.9	%	0.9	%	0.3	%	0.4	%	0.1	%
Cumulative	45.9	%	75.8	%	84.2	%	90.5	%	94.2	%	96.1	%	97.0	%	97.3	%	97.7	%	97.8	%

(a) Represents the cumulative percentage paid of incurred claims and allocated LAE (net of reinsurance, as estimated at December 31, 2017).

Specialty casualty
(Dollars in Millions)
	Incurred Claims and Allocated LAE, Net of Reinsurance																				As of December 31, 2017
	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)																				Total IBNR Plus Expected Development on Reported Claims		Cumulative Number of Reported Claims
Accident Year	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017
2008	$	905	$	891	$	874	$	860	$	871	$	856	$	855	$	849	$	855	$	854	$	41	59,991
2009			864		867		845		826		816		811		812		807		803		48		53,192
2010					847		863		864		842		856		846		845		842		65		52,855
2011							831		831		819		828		814		808		806		73		50,851
2012									874		865		859		859		855		849		104		49,836
2013											938		921		915		910		913		132		49,412
2014													1,011		984		984		982		202		52,167
2015															1,057		1,023		1,022		268		52,846
2016																	1,105		1,098		426		50,652
2017																			1,186		715		46,399
																	Total		$	9,355

	Cumulative Paid Claims and Allocated LAE, Net of Reinsurance
Accident Year	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)
	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017		% (a)
2008	$	162	$	355	$	490	$	588	$	653	$	702	$	727	$	751	$	768	$	782	91.6	%
2009			160		366		494		575		636		673		698		713		722		89.9	%
2010					179		393		539		623		676		712		734		748		88.8	%
2011							165		369		506		595		643		674		694		86.1	%
2012									163		368		495		596		658		696		82.0	%
2013											171		377		530		638		698		76.5	%
2014													182		398		556		659		67.1	%
2015															170		398		560		54.8	%
2016																	181		404		36.8	%
2017																			192		16.2	%
																	Total		$	6,155
									Unpaid losses and LAE — years 2008 through 2017										3,200
			Unpaid losses and LAE — 11th year and prior (excluding unallocated LAE)																430
			Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)																$	3,630

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance (Supplementary Information and Unaudited)
	Year 1		Year 2		Year 3		Year 4		Year 5		Year 6		Year 7		Year 8		Year 9		Year 10
Annual	18.6	%	23.4	%	16.2	%	11.0	%	6.9	%	4.6	%	2.8	%	2.1	%	1.6	%	1.6	%
Cumulative	18.6	%	42.0	%	58.2	%	69.2	%	76.1	%	80.7	%	83.5	%	85.6	%	87.2	%	88.8	%

(a) Represents the cumulative percentage paid of incurred claims and allocated LAE (net of reinsurance, as estimated at December 31, 2017).

Specialty financial
(Dollars in Millions)
	Incurred Claims and Allocated LAE, Net of Reinsurance																				As of December 31, 2017
	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)																				Total IBNR Plus Expected Development on Reported Claims		Cumulative Number of Reported Claims
Accident Year	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017
2008	$	190	$	207	$	212	$	209	$	203	$	199	$	198	$	197	$	198	$	199	$	1	27,292
2009			193		193		187		184		188		186		187		186		185		—		27,441
2010					139		146		133		133		135		133		130		128		2		21,929
2011							140		158		157		155		148		146		144		11		16,374
2012									164		163		151		139		137		135		11		21,050
2013											141		145		137		131		127		9		28,279
2014													146		157		156		154		16		28,983
2015															156		159		157		21		37,125
2016																	179		183		26		43,484
2017																			212		84		36,116
																	Total		$	1,624

	Cumulative Paid Claims and Allocated LAE, Net of Reinsurance
Accident Year	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)
	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017		% (a)
2008	$	103	$	153	$	185	$	189	$	189	$	191	$	193	$	194	$	194	$	197	99.0	%
2009			112		145		157		166		171		182		185		186		186		100.5	%
2010					61		93		104		122		133		131		128		127		99.2	%
2011							59		113		116		124		131		132		133		92.4	%
2012									71		104		109		117		121		126		93.3	%
2013											70		100		107		114		117		92.1	%
2014													62		108		125		128		83.1	%
2015															72		109		129		82.2	%
2016																	87		141		77.0	%
2017																			119		56.1	%
																	Total		$	1,403
									Unpaid losses and LAE — years 2008 through 2017										221
			Unpaid losses and LAE — 11th year and prior (excluding unallocated LAE)																—
			Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)																$	221

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance (Supplementary Information and Unaudited)
	Year 1		Year 2		Year 3		Year 4		Year 5		Year 6		Year 7		Year 8		Year 9		Year 10
Annual	49.8	%	26.3	%	8.3	%	5.7	%	3.6	%	2.0	%	0.2	%	0.1	%	—	%	1.5	%
Cumulative	49.8	%	76.1	%	84.4	%	90.1	%	93.7	%	95.7	%	95.9	%	96.0	%	96.0	%	97.5	%

(a) Represents the cumulative percentage paid of incurred claims and allocated LAE (net of reinsurance, as estimated at December 31, 2017).

Other specialty
(Dollars in Millions)
	Incurred Claims and Allocated LAE, Net of Reinsurance																				As of December 31, 2017
	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)																				Total IBNR Plus Expected Development on Reported Claims		Cumulative Number of Reported Claims (a)
Accident Year	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017
2008	$	49	$	49	$	49	$	49	$	48	$	46	$	45	$	45	$	44	$	43	$	3	—
2009			41		41		41		40		37		37		36		38		33		7		—
2010					36		39		40		39		40		40		40		40		2		—
2011							39		43		42		43		43		44		44		4		—
2012									42		40		39		40		41		39		8		—
2013											46		47		46		47		50		5		—
2014													58		57		59		59		16		—
2015															59		60		63		20		—
2016																	61		61		31		—
2017																			63		47		—
																	Total		$	495

	Cumulative Paid Claims and Allocated LAE, Net of Reinsurance
Accident Year	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)
	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017		% (b)
2008	$	10	$	16	$	23	$	31	$	35	$	37	$	37	$	37	$	38	$	39	90.7	%
2009			8		12		15		19		22		22		24		26		25		75.8	%
2010					8		14		21		24		27		33		35		36		90.0	%
2011							12		20		25		28		34		36		37		84.1	%
2012									8		17		21		25		28		30		76.9	%
2013											7		16		22		34		37		74.0	%
2014													13		21		30		36		61.0	%
2015															10		26		31		49.2	%
2016																	9		19		31.1	%
2017																			10		15.9	%
																	Total		$	300
									Unpaid losses and LAE — years 2008 through 2017										195
			Unpaid losses and LAE — 11th year and prior (excluding unallocated LAE)																83
			Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)																$	278

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance (Supplementary Information and Unaudited)
	Year 1		Year 2		Year 3		Year 4		Year 5		Year 6		Year 7		Year 8		Year 9		Year 10
Annual	19.8	%	17.3	%	12.5	%	12.8	%	8.9	%	5.9	%	3.3	%	2.9	%	(0.4	%)	2.3	%
Cumulative	19.8	%	37.1	%	49.6	%	62.4	%	71.3	%	77.2	%	80.5	%	83.4	%	83.0	%	85.3	%

(a) The amounts shown in Other specialty represent business assumed by AFG’s internal reinsurance program from the operations that make up AFG’s other Specialty property and casualty insurance sub-segments. Accordingly, the liability for incurred claims and allocated LAE represents additional reserves held on claims counted in the tables provided for the other sub-segments (above).

(b) Represents the cumulative percentage paid of incurred claims and allocated LAE (net of reinsurance, as estimated at December 31, 2017).

Total Specialty Group
(Dollars in Millions)
	Incurred Claims and Allocated LAE, Net of Reinsurance																				As of December 31, 2017
	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)																				Total IBNR Plus Expected Development on Reported Claims		Cumulative Number of Reported Claims
Accident Year	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017
2008	$	2,067	$	2,018	$	1,987	$	1,971	$	1,978	$	1,955	$	1,953	$	1,947	$	1,951	$	1,950	$	46	244,447
2009			1,624		1,607		1,596		1,566		1,552		1,545		1,543		1,539		1,529		58		221,165
2010					1,724		1,710		1,705		1,690		1,710		1,698		1,698		1,690		75		215,418
2011							1,840		1,848		1,849		1,871		1,861		1,866		1,859		98		207,643
2012									1,970		1,952		1,946		1,947		1,955		1,941		142		217,516
2013											2,036		2,011		2,000		1,996		2,000		168		219,940
2014													2,083		2,050		2,040		2,038		272		218,032
2015															2,114		2,046		2,040		363		225,000
2016																	2,116		2,082		593		216,248
2017																			2,374		1,119		210,970
																	Total		$	19,503

	Cumulative Paid Claims and Allocated LAE, Net of Reinsurance
Accident Year	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)
	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017		% (a)
2008	$	627	$	1,230	$	1,459	$	1,607	$	1,701	$	1,765	$	1,803	$	1,828	$	1,847	$	1,866	95.7	%
2009			509		871		1,079		1,216		1,308		1,370		1,404		1,424		1,435		93.9	%
2010					576		1,005		1,220		1,387		1,485		1,536		1,562		1,580		93.5	%
2011							609		1,181		1,389		1,534		1,629		1,682		1,711		92.0	%
2012									824		1,214		1,418		1,579		1,675		1,735		89.4	%
2013											697		1,214		1,443		1,617		1,714		85.7	%
2014													594		1,173		1,422		1,588		77.9	%
2015															619		1,128		1,403		68.8	%
2016																	576		1,098		52.7	%
2017																			708		29.8	%
																	Total		$	14,838
									Unpaid losses and LAE — years 2008 through 2017										4,665
			Unpaid losses and LAE — 11th year and prior (excluding unallocated LAE)																533
			Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)																$	5,198

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance (Supplementary Information and Unaudited)
	Year 1		Year 2		Year 3		Year 4		Year 5		Year 6		Year 7		Year 8		Year 9		Year 10
Annual	32.7	%	26.1	%	12.1	%	8.5	%	5.3	%	3.3	%	1.8	%	1.2	%	0.8	%	1.0	%
Cumulative	32.7	%	58.8	%	70.9	%	79.4	%	84.7	%	88.0	%	89.8	%	91.0	%	91.8	%	92.8	%

(a) Represents the cumulative percentage paid of incurred claims and allocated LAE (net of reinsurance, as estimated at December 31, 2017).

Closed Block of Long-Term Care Insurance Following the completion of the sale of substantially all of its run-off long-term care insurance business in December 2015, AFG’s remaining long-term care insurance reserves were $39 million at December 31, 2017 and $37 million at December 31, 2016, net of reinsurance recoverables and excluding the impact of unrealized gains on securities. AFG’s remaining outstanding long-term care policies have level premiums and are guaranteed renewable. Premium rates can potentially be increased in reaction to adverse experience; however, any rate increases would require regulatory approval.

FHLB Funding Agreements   Great American Life Insurance Company (“GALIC”), a wholly-owned annuity subsidiary, is a member of the Federal Home Loan Bank of Cincinnati (“FHLB”). The FHLB makes advances and provides other banking services to member institutions. Members are required to purchase stock in the FHLB in addition to maintaining collateral deposits that back any funds advanced. GALIC’s $44 million investment in FHLB capital stock at December 31, 2017, is included in other investments at cost. Membership in the FHLB provides the annuity operations with an additional source of liquidity. These advances further the FHLB’s mission of improving access to housing by increasing liquidity in the residential mortgage-backed securities market. In the fourth quarter of 2017, GALIC refinanced the terms on advances totaling $831 million, which lowered the spread over LIBOR. In the fourth quarter of 2017, GALIC also repaid $64 million to the FHLB, decreasing the total amount advanced to $871 million (included in annuity benefits accumulated) at December 31, 2017. Interest rates under the various funding agreements on the advances range from 0.03% to 0.35% over LIBOR (average rate of 1.75% at December 31, 2017). While these advances must be repaid between 2018 and 2020 ($285 million in 2018 and $586 million in 2020), GALIC has the option to prepay all or a portion of the advances. GALIC has invested the proceeds from the advances in fixed maturity securities with similar expected lives as the advances for the purpose of earning a spread over the interest payments due to the FHLB. The advances on these agreements are collateralized by fixed maturity investments, which have a total fair value of $1.04 billion (included in available for sale fixed maturity securities) at December 31, 2017. Interest credited on the funding agreements, which is included in annuity benefits, was $14 million in 2017, $8 million in 2016 and $3 million in 2015.

Statutory Information   AFG’s U.S.-based insurance subsidiaries are required to file financial statements with state insurance regulatory authorities prepared on an accounting basis prescribed or permitted by such authorities (statutory basis). Net earnings and capital and surplus on a statutory basis for the insurance subsidiaries were as follows (in millions):

	Net Earnings						Capital and Surplus
	2017		2016		2015		2017		2016
Property and casualty companies	$	484	$	461	$	408	$	2,729	$	2,939
Life insurance companies	286		167		399		2,132		1,976

The National Association of Insurance Commissioners’ (“NAIC”) model law for risk based capital (“RBC”) applies to both life and property and casualty insurance companies. RBC formulas determine the amount of capital that an insurance company needs so that it has an acceptable expectation of not becoming financially impaired. Companies below specific trigger points or ratios are subject to regulatory action. At December 31, 2017 and 2016, the capital ratios of all AFG insurance companies substantially exceeded the RBC requirements. AFG’s insurance companies did not use any prescribed or permitted statutory accounting practices that differed from the NAIC statutory accounting practices at December 31, 2017 or 2016.

Payments of dividends by AFG’s insurance companies are subject to various state laws that limit the amount of dividends that can be paid. Under applicable restrictions, the maximum amount of dividends available to AFG in 2018 from its insurance subsidiaries without seeking regulatory approval is $826 million. Additional amounts of dividends require regulatory approval.

AFG paid common stock dividends to shareholders totaling $421 million, $187 million and $178 million in 2017, 2016 and 2015, respectively. Currently, there are no regulatory restrictions on AFG’s retained earnings or net earnings that materially impact its ability to pay dividends. Based on shareholders’ equity at December 31, 2017, AFG could pay dividends in excess of $1 billion without violating its most restrictive debt covenant. However, the payment of future dividends will be at the discretion of AFG’s Board of Directors and will be dependent on many factors including AFG’s financial condition and results of operations, the capital requirements of its insurance subsidiaries, and rating agency commitments.

Reinsurance In the normal course of business, AFG’s insurance subsidiaries cede reinsurance to other companies to diversify risk and limit maximum loss arising from large claims. However, AFG remains liable to its insureds regardless of whether a reinsurer is able to meet its obligations. The following table shows (in millions) (i) amounts deducted from property and casualty written and earned premiums in connection with reinsurance ceded, (ii) written and earned premiums included in income for reinsurance assumed and (iii) reinsurance recoveries, which represent ceded losses and loss adjustment expenses.

	2017			2016			2015
Direct premiums written	$	6,310		$	5,858		$	5,713
Reinsurance assumed	192			123			119
Reinsurance ceded	(1,751		)	(1,595		)	(1,505		)
Net written premiums	$	4,751		$	4,386		$	4,327
Direct premiums earned	$	6,112		$	5,745		$	5,613
Reinsurance assumed	157			118			105
Reinsurance ceded	(1,690		)	(1,535		)	(1,494		)
Net earned premiums	$	4,579		$	4,328		$	4,224
Reinsurance recoveries	$	1,379		$	810		$	936

In June 2017, AFG’s property and casualty insurance subsidiaries entered into a reinsurance agreement to obtain supplemental catastrophe protection through a catastrophe bond structure with Riverfront Re Ltd. (“Riverfront”). The reinsurance agreement provides supplemental reinsurance coverage up to 95% of $200 million (fully collateralized) for catastrophe losses in excess of $100 million (per occurrence and annual aggregate) occurring between June 1, 2017 and December 31, 2020. In connection with the reinsurance agreement, Riverfront issued notes to unrelated investors for the full amount of coverage provided under the reinsurance agreement. Through December 31, 2017, AFG’s incurred catastrophe losses have not reached the level of attachment for the catastrophe bond structure. Riverfront is a variable interest entity in which AFG does not have a variable interest because the variability in Riverfront’s results will be absorbed entirely by the investors in Riverfront. Accordingly, Riverfront is not consolidated in AFG’s financial statements and the reinsurance agreement is accounted for as ceded reinsurance. AFG’s cost for this coverage is approximately $11 million per year.

AFG’s property and casualty insurance operations entered into a similar reinsurance agreement in March 2014 to obtain additional catastrophe protection through a catastrophe bond structure with Riverfront, which provided supplemental reinsurance coverage for catastrophe losses occurring between April 1, 2014 and January 6, 2017.

AFG has reinsured approximately $8.32 billion of its $12.05 billion in face amount of life insurance at December 31, 2017 compared to $10.22 billion of its $13.49 billion in face amount of life insurance at December 31, 2016. Life written premiums ceded were $28 million, $31 million and $40 million for 2017, 2016 and 2015, respectively. Reinsurance recoveries on ceded life policies were $35 million, $41 million and $50 million for 2017, 2016 and 2015, respectively.

Fixed Annuities   For certain products, the liability for “annuity benefits accumulated” includes reserves for excess benefits expected to be paid on future deaths and annuitizations (“EDAR”), guaranteed withdrawal benefits and accrued persistency and premium bonuses. The liabilities included in AFG’s Balance Sheet for these benefits, excluding the impact of unrealized gains on securities, were as follows at December 31 (in millions):

	2017		2016
Expected death and annuitization	$	228	$	223
Guaranteed withdrawal benefits	357		278
Accrued persistency and premium bonuses	3		6

Variable Annuities   At December 31, 2017, the aggregate guaranteed minimum death benefit value (assuming every variable annuity policyholder died on that date) on AFG’s variable annuity policies exceeded the fair value of the underlying variable annuities by $15 million, compared to $20 million at December 31, 2016. Death benefits paid in excess of the variable annuity account balances were less than $1 million in each of the last three years.

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Additional Information

12 Months Ended

Dec. 31, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Additional Information

Additional Information

Allowance for Uncollectible Reinsurance   AFG’s aggregate allowance for uncollectible reinsurance recoverables was $20 million at December 31, 2017 and $22 million at December 31, 2016. AFG reviews the allowance quarterly and adjusts it as necessary to reflect changes in estimates of uncollectible balances. AFG recorded net expense reductions against the allowance of less than $1 million in both 2017 and 2016 and $3 million in 2015. In 2017, the allowance was reduced by reinsurance recoverable write-offs of $2 million.

Operating Leases   Total rental expense for various leases of office space and equipment was $69 million in 2017, $67 million in 2016 and $70 million in 2015. Future minimum rentals, related principally to office space, required under operating leases having initial or remaining noncancelable lease terms in excess of one year at December 31, 2017, were as follows: 2018 – $63 million; 2019 – $57 million; 2020 – $50 million; 2021 – $42 million; 2022 – $34 million; and $100 million thereafter.

Financial Instruments — Unfunded Commitments On occasion, AFG and its subsidiaries have entered into financial instrument transactions that may present off-balance-sheet risks of both a credit and market risk nature. These transactions include commitments to fund loans, loan guarantees and commitments to purchase and sell securities or loans. At December 31, 2017, AFG and its subsidiaries had commitments to fund credit facilities and contribute capital to limited partnerships and limited liability corporations of approximately $484 million.

Benefit Plans   AFG expensed approximately $45 million in 2017, $43 million in 2016 and $34 million in 2015 for its retirement and employee savings plans.

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Condensed Financial Information of Parent Company

12 Months Ended

Dec. 31, 2017

Condensed Financial Information of Parent Company Only Disclosure [Abstract]

Condensed Financial Information of Parent Company

AMERICAN FINANCIAL GROUP, INC. — PARENT ONLY

SCHEDULE II — CONDENSED FINANCIAL INFORMATION OF REGISTRANT

(In Millions)

Condensed Balance Sheet

	December 31,
	2017		2016
Assets:
Cash and cash equivalents	$	299	$	197
Investment in securities	70		63
Investment in subsidiaries (a)	6,310		5,989
Other investments	2		2
Other assets	141		136
Total assets	$	6,822	$	6,387
Liabilities and Equity:
Long-term debt	$	1,301	$	1,283
Other liabilities	191		188
Shareholders’ equity	5,330		4,916
Total liabilities and equity	$	6,822	$	6,387

Condensed Statement of Earnings

	Year ended December 31,
	2017		2016		2015
Revenues:
Dividends from subsidiaries	$	681	$	643	$	311
Equity in undistributed earnings of subsidiaries	264		286		386
Investment and other income	13		7		4
Total revenues	958		936		701
Costs and Expenses:
Interest charges on intercompany borrowings	9		9		9
Interest charges on other borrowings	85		77		73
Other expenses	142		82		72
Total costs and expenses	236		168		154
Earnings before income taxes	722		768		547
Provision for income taxes	247		119		195
Net Earnings Attributable to Shareholders	$	475	$	649	$	352

Condensed Statement of Comprehensive Income

Net earnings attributable to shareholders	$	475	$	649	$	352
Other comprehensive income (loss), net of tax	296		62		(423		)
Total comprehensive income (loss), net of tax	$	771	$	711	$	(71	)

________________________

(a) Investment in subsidiaries includes intercompany receivables and payables.

Condensed Statement of Cash Flows

	Year ended December 31,
	2017			2016			2015
Operating Activities:
Net earnings attributable to shareholders	$	475		$	649		$	352
Adjustments:
Equity in net earnings of subsidiaries	(575		)	(638		)	(451		)
Dividends from subsidiaries	580			611			280
Other operating activities, net	98			(67		)	(19		)
Net cash provided by operating activities	578			555			162
Investing Activities:
Capital contributions to subsidiaries	(93		)	(560		)	(27		)
Returns of capital from subsidiaries	30			—			1
Purchases of investments, property and equipment	(2		)	(1		)	(10		)
Proceeds from maturities and redemptions of investments	2			1			—
Proceeds from sales of investments, property and equipment	—			—			3
Net cash used in investing activities	(63		)	(560		)	(33		)
Financing Activities:
Additional long-term borrowings	712			296			145
Reductions of long-term debt	(745		)	—			(132		)
Issuances of Common Stock	37			35			57
Repurchases of Common Stock	—			(133		)	(126		)
Cash dividends paid on Common Stock	(417		)	(185		)	(176		)
Net cash provided by (used in) financing activities	(413		)	13			(232		)
Net Change in Cash and Cash Equivalents	102			8			(103		)
Cash and cash equivalents at beginning of year	197			189			292
Cash and cash equivalents at end of year	$	299		$	197		$	189

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Supplementary Insurance Information

12 Months Ended

Dec. 31, 2017

Supplementary Insurance Information [Abstract]

Supplementary Insurance Information

AMERICAN FINANCIAL GROUP, INC. AND SUBSIDIARIES

SCHEDULE III — SUPPLEMENTARY INSURANCE INFORMATION

THREE YEARS ENDED DECEMBER 31, 2017

(IN MILLIONS)

Segment	Deferred policy acquisition costs		Reserves for future policy benefits, claims and unpaid losses and LAE		Unearned premiums		Net earned premiums		Net investment income			Benefits, claims, losses and settlement expenses		Amortization of deferred policy acquisition costs		Other operating expenses		Net written premiums (excluding life)
2017
Property and casualty insurance	$	270	$	9,678	$	2,410	$	4,579	$	362		$	2,955	$	556	$	867	$	4,751
Annuity	920		33,316		—		—		1,458			892		130		159		—
Run-off long-term care and life	26		658		—		22		20			26		4		11		3
Other	—		—		—		—		(9		)	—		—		541		—
Total	$	1,216	$	43,652	$	2,410	$	4,601	$	1,831		$	3,873	$	690	$	1,578	$	4,754
2016
Property and casualty insurance	$	238	$	8,563	$	2,171	$	4,328	$	350		$	2,762	$	520	$	870	$	4,386
Annuity	981		29,907		—		—		1,356			800		149		142		—
Run-off long-term care and life	20		691		—		24		21			33		4		10		3
Other	—		—		—		—		(31		)	—		—		421		—
Total	$	1,239	$	39,161	$	2,171	$	4,352	$	1,696		$	3,595	$	673	$	1,443	$	4,389
2015
Property and casualty insurance	$	226	$	8,127	$	2,060	$	4,224	$	319		$	2,695	$	511	$	839	$	4,327
Annuity	934		26,622		—		—		1,224			732		136		123		—
Run-off long-term care and life	24		705		—		104		80			131		6		37		73
Other	—		—		—		—		10			—		—		370		—
Total	$	1,184	$	35,454	$	2,060	$	4,328	$	1,633		$	3,558	$	653	$	1,369	$	4,400

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Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2017

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation   The consolidated financial statements include the accounts of American Financial Group, Inc. and its subsidiaries (“AFG”). Certain reclassifications have been made to prior years to conform to the current year’s presentation. All significant intercompany balances and transactions have been eliminated. The results of operations of companies since their formation or acquisition are included in the consolidated financial statements. Events or transactions occurring subsequent to December 31, 2017, and prior to the filing of this Form 10-K, have been evaluated for potential recognition or disclosure herein.

The preparation of the financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”) requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Changes in circumstances could cause actual results to differ materially from those estimates.

Fair Value Measurements

Fair Value Measurements   Accounting standards define fair value as the price that would be received to sell an asset or paid to transfer a liability (an exit price) in an orderly transaction between market participants on the measurement date. The standards establish a hierarchy of valuation techniques based on whether the assumptions that market participants would use in pricing the asset or liability (“inputs”) are observable or unobservable. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect AFG’s assumptions about the assumptions market participants would use in pricing the asset or liability. AFG did not have any significant nonrecurring fair value measurements of nonfinancial assets and liabilities in 2017 or 2016.

Investments

Investments Fixed maturity and equity securities classified as “available for sale” are reported at fair value with unrealized gains and losses included in accumulated other comprehensive income (“AOCI”) in AFG’s Balance Sheet. Fixed maturity and equity securities classified as “trading” are reported at fair value with changes in unrealized holding gains or losses during the period included in net investment income. Mortgage and policy loans are carried primarily at the aggregate unpaid balance.

In January 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-01, which, among other things, will require all equity securities currently classified as “available for sale” to be reported at fair value, with holding gains and losses recognized in net earnings, instead of AOCI. AFG will be required to adopt this guidance effective January 1, 2018. At the date of adoption, the $221 million net unrealized gain on equity securities included in AOCI as of December 31, 2017 will be reclassified to retained earnings as the cumulative effect of an accounting change.

Premiums and discounts on fixed maturity securities are amortized using the effective interest method. Mortgage-backed securities (“MBS”) are amortized over a period based on estimated future principal payments, including prepayments. Prepayment assumptions are reviewed periodically and adjusted to reflect actual prepayments and changes in expectations.

Gains or losses on securities are determined on the specific identification basis. When a decline in the value of a specific investment is considered to be other-than-temporary at the balance sheet date, a provision for impairment is charged to earnings (included in realized gains (losses) on securities) and the cost basis of that investment is reduced. If management can assert that it does not intend to sell an impaired fixed maturity security and it is not more likely than not that it will have to sell the security before recovery of its amortized cost basis, then the other-than-temporary impairment is separated into two components: (i) the amount related to credit losses (recorded in earnings) and (ii) the amount related to all other factors (recorded in other comprehensive income). The credit-related portion of an other-than-temporary impairment is measured by comparing a security’s amortized cost to the present value of its current expected cash flows discounted at its effective yield prior to the impairment charge. Both components are shown in the statement of earnings. If management intends to sell an impaired security, or it is more likely than not that it will be required to sell the security before recovery, an impairment charge to earnings is recorded to reduce the amortized cost of that security to fair value.

Derivatives

Derivatives Derivatives included in AFG’s Balance Sheet are recorded at fair value. Changes in fair value of derivatives are included in earnings, unless the derivatives are designated and qualify as highly effective cash flow hedges. Derivatives that do not qualify for hedge accounting under GAAP consist primarily of (i) components of certain fixed maturity securities (primarily interest-only MBS) and (ii) the equity-based component of certain annuity products (included in annuity benefits accumulated) and related equity index call options designed to be consistent with the characteristics of the liabilities and used to mitigate the risk embedded in those annuity products.

To qualify for hedge accounting, at the inception of a derivative contract, AFG formally documents the relationship between the terms of the hedge and the hedged items and its risk management objective. This documentation includes defining how hedge effectiveness and ineffectiveness will be measured on a retrospective and prospective basis.

Changes in the fair value of derivatives that are designated and qualify as highly effective cash flow hedges are recorded in AOCI and are reclassified into earnings when the variability of the cash flows from the hedged items impacts earnings. Any hedge ineffectiveness is immediately recorded in current period earnings. When the change in the fair value of a qualifying cash flow hedge is included in earnings, it is included in the same line item in the statement of earnings as the cash flows from the hedged item. AFG uses interest rate swaps that are designated and qualify as highly effective cash flow hedges to mitigate interest rate risk related to certain floating-rate securities included in AFG’s portfolio of fixed maturity securities.

For derivatives that are designated and qualify as highly effective fair value hedges, changes in the fair value of the derivative, along with changes in the fair value of the hedged item attributable to the hedged risk, are recognized in current period earnings.

Goodwill

Goodwill Goodwill represents the excess of cost of subsidiaries over AFG’s equity in their underlying net assets. Goodwill is not amortized, but is subject to an impairment test at least annually. An entity is not required to complete the quantitative annual goodwill impairment test on a reporting unit if the entity elects to perform a qualitative analysis and determines that it is more likely than not that the reporting unit’s fair value exceeds its carrying amount.

Reinsurance

Reinsurance Amounts recoverable from reinsurers are estimated in a manner consistent with the claim liability associated with the reinsured policies. AFG’s property and casualty insurance subsidiaries report as assets (i) the estimated reinsurance recoverable on paid and unpaid losses, including an estimate for losses incurred but not reported, and (ii) amounts paid or due to reinsurers applicable to the unexpired terms of policies in force. Payable to reinsurers includes ceded premiums due to reinsurers, as well as ceded premiums retained by AFG’s property and casualty insurance subsidiaries under contracts to fund ceded losses as they become due. AFG’s insurance subsidiaries also assume reinsurance from other companies. Earnings on reinsurance assumed is recognized based on information received from ceding companies.

An AFG subsidiary cedes life insurance policies to a third party on a funds withheld basis whereby the subsidiary retains the assets (securities) associated with the reinsurance contract. Interest is credited to the reinsurer based on the actual investment performance of the retained assets. This reinsurance contract is considered to contain an embedded derivative (that must be adjusted to fair value) because the yield on the payable is based on a specific block of the ceding company’s assets, rather than the overall creditworthiness of the ceding company. AFG determined that changes in the fair value of the underlying portfolio of fixed maturity securities is an appropriate measure of the value of the embedded derivative. The securities related to this contract are classified as “trading.” The adjustment to fair value on the embedded derivative offsets the investment income recorded on the adjustment to fair value of the related trading portfolio.

Deferred Policy Acquisition Costs (''DPAC'')

Deferred Policy Acquisition Costs (“DPAC”)   Policy acquisition costs (principally commissions, premium taxes and certain underwriting and policy issuance costs) directly related to the successful acquisition or renewal of an insurance contract are deferred. DPAC also includes capitalized costs associated with sales inducements offered to fixed annuity policyholders such as enhanced interest rates and premium and persistency bonuses.

For the property and casualty companies, DPAC is limited based upon recoverability without any consideration for anticipated investment income and is charged against income ratably over the terms of the related policies. A premium deficiency is recognized if the sum of expected claims costs, claims adjustment expenses and unamortized acquisition costs exceed the related unearned premiums. A premium deficiency is first recognized by charging any unamortized acquisition costs to expense to the extent required to eliminate the deficiency. If the premium deficiency is greater than unamortized acquisition costs, a liability is accrued for the excess deficiency and reported with unpaid losses and loss adjustment expenses.

DPAC related to annuities is deferred to the extent deemed recoverable and amortized, with interest, in relation to the present value of actual and expected gross profits on the policies. Expected gross profits consist principally of estimated future investment margin (estimated future net investment income less interest credited on policyholder funds) and surrender, mortality, and other life and annuity policy charges, less death, annuitization and guaranteed withdrawal benefits in excess of account balances and estimated future policy administration expenses. To the extent that realized gains and losses result in adjustments to the amortization of DPAC related to annuities, such adjustments are reflected as components of realized gains (losses) on securities.

DPAC related to traditional life and health insurance is amortized over the expected premium paying period of the related policies, in proportion to the ratio of annual premium revenues to total anticipated premium revenues. See “Life, Accident and Health Reserves” below for details on the impact of loss recognition on the accounting for traditional life and health insurance contracts.

DPAC includes the present value of future profits on business in force of annuity and life, accident and health insurance companies acquired (“PVFP”). PVFP represents the portion of the costs to acquire companies that is allocated to the value of the right to receive future cash flows from insurance contracts existing at the date of acquisition. PVFP is amortized with interest in relation to expected gross profits of the acquired policies for annuities and universal life products and in relation to the premium paying period for traditional life and health insurance products.

DPAC and certain other balance sheet amounts related to annuity, long-term care and life businesses are also adjusted, net of tax, for the change in expense that would have been recorded if the unrealized gains (losses) from securities had actually been realized. These adjustments are included in unrealized gains (losses) on marketable securities, a component of AOCI in AFG’s Balance Sheet.

Managed Investment Entities

Managed Investment EntitiesA company is considered the primary beneficiary of, and therefore must consolidate, a variable interest entity (“VIE”) based primarily on its ability to direct the activities of the VIE that most significantly impact that entity’s economic performance and the obligation to absorb losses of, or receive benefits from, the entity that could potentially be significant to the VIE.

AFG manages, and has investments in, collateralized loan obligations (“CLOs”) that are VIEs (see Note H — “Managed Investment Entities”). AFG has determined that it is the primary beneficiary of the CLOs because (i) its role as asset manager gives it the power to direct the activities that most significantly impact the economic performance of the CLOs and (ii) through its investment in the CLO debt tranches, it has exposure to CLO losses (limited to the amount AFG invested) and the right to receive CLO benefits that could potentially be significant to the CLOs.

On January 1, 2016, AFG adopted ASU 2015-02, which amended certain consolidation accounting guidance, including the VIE guidance that applies to collateralized financing entities such as CLOs. The new guidance affects how fee arrangements with CLO asset managers impact the determination of the primary beneficiary of those entities. Due to the significance of AFG’s investments in the CLOs that it manages, the new guidance did not impact the consolidation of AFG’s currently outstanding CLOs. The new guidance also impacted the consolidation analysis that applies to limited partnerships and similar entities, but did not result in a change to the accounting for AFG’s existing investments in those entities.

Because AFG has no right to use the CLO assets and no obligation to pay the CLO liabilities, the assets and liabilities of the CLOs are shown separately in AFG’s Balance Sheet. AFG has elected the fair value option for reporting on the CLO assets and liabilities to improve the transparency of financial reporting related to the CLOs. The net gain or loss from accounting for the CLO assets and liabilities at fair value is presented separately in AFG’s Statement of Earnings.

The fair values of a CLO’s assets may differ from the separately measured fair values of its liabilities even though the CLO liabilities only have recourse to the CLO assets. AFG has set the carrying value of the CLO liabilities equal to the fair value of the CLO assets (which have more observable fair values) as an alternative to reporting those liabilities at a separately measured fair value. CLO earnings attributable to AFG’s shareholders are measured by the change in the fair value of AFG’s investments in the CLOs and management fees earned.

Prior to the adoption of new guidance effective January 1, 2015, measuring both the CLO assets and CLO liabilities at separately determined fair values resulted in a difference between the carrying value of the CLO assets and the carrying value of the CLO liabilities that was not attributable to AFG’s ownership interest in the CLOs. This difference was recorded as “appropriated retained earnings — managed investment entities” in AFG’s Balance Sheet. In accordance with the guidance adopted in 2015, the amount reported as “appropriated retained earnings — managed investment entities” at December 31, 2014 was reclassified to “liabilities of managed investment entities” on January 1, 2015 as the cumulative effect of an accounting change.

Unpaid Losses and Loss Adjustment Expenses

Unpaid Losses and Loss Adjustment Expenses   The net liabilities stated for unpaid claims and for expenses of investigation and adjustment of unpaid claims represent management’s best estimate and are based upon (i) the accumulation of case estimates for losses reported prior to the close of the accounting period on direct business written; (ii) estimates received from ceding reinsurers and insurance pools and associations; (iii) estimates of unreported losses (including possible development on known claims) based on past experience; (iv) estimates based on experience of expenses for investigating and adjusting claims; and (v) the current state of the law and coverage litigation. Establishing reserves for asbestos, environmental and other mass tort claims involves considerably more judgment than other types of claims due to, among other things, inconsistent court decisions, an increase in bankruptcy filings as a result of asbestos-related liabilities, novel theories of coverage, and judicial interpretations that often expand theories of recovery and broaden the scope of coverage.

Loss reserve liabilities are subject to the impact of changes in claim amounts and frequency and other factors. Changes in estimates of the liabilities for losses and loss adjustment expenses are reflected in the statement of earnings in the period in which determined. Despite the variability inherent in such estimates, management believes that the liabilities for unpaid losses and loss adjustment expenses are adequate.

Annuity Benefits Accumulated

Annuity Benefits Accumulated   Annuity receipts and benefit payments are recorded as increases or decreases in annuity benefits accumulated rather than as revenue and expense. Increases in this liability for interest credited are charged to expense and decreases for policy charges are credited to other income.

For certain products, annuity benefits accumulated also includes reserves for accrued persistency and premium bonuses, guaranteed withdrawals and excess benefits expected to be paid on future deaths and annuitizations (“EDAR”). The liabilities for EDAR and guaranteed withdrawals are accrued for and modified using assumptions consistent with those used in determining DPAC and DPAC amortization, except that amounts are determined in relation to the present value of total expected assessments. Total expected assessments consist principally of estimated future investment margin, surrender, mortality, and other life and annuity policy charges, and unearned revenues once they are recognized as income.

Annuity benefits accumulated also includes amounts advanced from the Federal Home Loan Bank of Cincinnati.

Unearned Revenue

Unearned Revenue   Certain upfront policy charges on annuities are deferred as unearned revenue (included in other liabilities) and recognized in net earnings (included in other income) using the same assumptions and estimated gross profits used to amortize DPAC.

Life, Accident and Health Reserves

Life, Accident and Health Reserves Liabilities for future policy benefits under traditional life, accident and health policies are computed using the net level premium method. Computations are based on the original projections of investment yields, mortality, morbidity and surrenders and include provisions for unfavorable deviations unless a loss recognition event (premium deficiency) occurs. Claim reserves and liabilities established for accident and health claims are modified as necessary to reflect actual experience and developing trends.

For long-duration contracts (such as traditional life and long-term care policies), loss recognition occurs when, based on current expectations as of the measurement date, existing contract liabilities plus the present value of future premiums (including reasonably expected rate increases) are not expected to cover the present value of future claims payments and related settlement and maintenance costs (excluding overhead) as well as unamortized acquisition costs. If a block of business is determined to be in loss recognition, a charge is recorded in earnings in an amount equal to the excess of the present value of expected future claims costs and unamortized acquisition costs over existing reserves plus the present value of expected future premiums (with no provision for adverse deviation). The charge is recorded first to reduce unamortized acquisition costs and then as an additional reserve (if unamortized acquisition costs have been reduced to zero).

In addition, reserves for traditional life and long-term care policies are subject to adjustment for loss recognition charges that would have been recorded if the unrealized gains (losses) from securities had actually been realized. This adjustment is included in unrealized gains (losses) on marketable securities, a component of AOCI in AFG’s Balance Sheet.

Debt Issuance Costs

Debt Issuance CostsDebt issuance costs related to AFG’s outstanding debt are amortized over the life of the related debt using the effective interest method. Effective January 1, 2016, AFG adopted (on a retrospective basis) ASU 2015-03, which requires debt issuance costs to be presented in the balance sheet as a direct reduction in the carrying value of long-term debt (consistent with the treatment of debt discounts) with the periodic amortization of such costs included in interest expense. Debt issuance costs related to AFG’s revolving credit facilities will continue to be included in other assets in AFG’s Balance Sheet. Prior to AFG’s adoption of ASU 2015-03, AFG reported unamortized debt issuance costs as a deferred charge asset (included in other assets) in AFG’s Balance Sheet and the periodic amortization was included in other expenses in AFG’s Statement of Earnings. The updated guidance did not affect the overall recognition and measurement guidance for debt issuance costs. Accordingly, the guidance did not have an overall impact on AFG’s Shareholders’ Equity or results of operations.

Variable Annuity Assets and Liabilities

Variable Annuity Assets and Liabilities   Separate accounts related to variable annuities represent the fair value of deposits invested in underlying investment funds on which AFG earns a fee. Investment funds are selected and may be changed only by the policyholder, who retains all investment risk.

AFG’s variable annuity contracts contain a guaranteed minimum death benefit (“GMDB”) to be paid if the policyholder dies before the annuity payout period commences. In periods of declining equity markets, the GMDB may exceed the value of the policyholder’s account. A GMDB liability is established for future excess death benefits using assumptions together with a range of reasonably possible scenarios for investment fund performance that are consistent with DPAC capitalization and amortization assumptions.

Premium Recognition

Premium Recognition   Property and casualty premiums are earned generally over the terms of the policies on a pro rata basis. Unearned premiums represent that portion of premiums written, which is applicable to the unexpired terms of policies in force. On reinsurance assumed from other insurance companies or written through various underwriting organizations, unearned premiums are based on information received from such companies and organizations. For traditional life, accident and health products, premiums are recognized as revenue when legally collectible from policyholders. For interest-sensitive life and universal life products, premiums are recorded in a policyholder account, which is reflected as a liability. Revenue is recognized as amounts are assessed against the policyholder account for mortality coverage and contract expenses.

Noncontrolling Interests

Noncontrolling Interests   For balance sheet purposes, noncontrolling interests represent the interests of shareholders other than AFG in consolidated entities. In the statement of earnings, net earnings and losses attributable to noncontrolling interests represents such shareholders’ interest in the earnings and losses of those entities. Noncontrolling interests that are redeemable at the option of the holder are presented separately in the mezzanine section of the balance sheet (between liabilities and equity).

Income Taxes

Income Taxes   Deferred income taxes are calculated using the liability method. Under this method, deferred income tax assets and liabilities are determined based on differences between financial reporting and tax bases and are measured using enacted tax rates. A valuation allowance is established to reduce total deferred tax assets to an amount that will more likely than not be realized.

AFG recognizes the tax benefits of uncertain tax positions only when the position is more likely than not to be sustained under examination by the appropriate taxing authority. Interest and penalties on AFG’s reserve for uncertain tax positions are recognized as a component of tax expense.

The effect of a change in tax rates on deferred tax assets and liabilities is recorded in net earnings in the period that includes the enactment date. This includes the impact on deferred tax assets or liabilities established through AOCI, which results in an amount equal to the difference between the deferred tax at the historical corporate rate and the newly enacted rate stranded in AOCI. As permitted under guidance adopted effective December 31, 2017 (ASU 2018-02), AFG reclassified the $145 million stranded in AOCI from accounting for the Tax Cuts and Jobs Act of 2017 to retained earnings at December 31, 2017. See Note L — “Income Taxes” for further information.

Stock-Based Compensation

Stock-Based Compensation All share-based grants are recognized as compensation expense on a straight-line basis over their vesting periods based on their calculated fair value at the date of grant. AFG uses the Black-Scholes pricing model to measure the fair value of employee stock options. See Note K — “Shareholders’ Equity” for further information.

In the fourth quarter of 2016, AFG early adopted ASU 2016-09, which, among other things, requires excess tax benefits or deficiencies for share-based payments to be recorded through income tax expense in the statement of earnings instead of directly to capital surplus (as required under the previous guidance). As a result, AFG’s Statement of Earnings includes a tax benefit of $17 million in 2017 and $9 million in 2016 that under the previous guidance would have been recorded directly to capital surplus. In addition, the new guidance allows entities to elect to account for forfeitures of awards when they occur rather than accruing expense based on an estimate of expected forfeitures (as required under the previous guidance). AFG has elected to account for forfeitures as they occur. The resulting cumulative effect of accounting change of less than $1 million was recorded directly to retained earnings on January 1, 2016.

Benefit Plans

Benefit Plans   AFG provides retirement benefits to qualified employees of participating companies through the AFG 401(k) Retirement and Savings Plan, a defined contribution plan. AFG makes all contributions to the retirement fund portion of the plan and matches a percentage of employee contributions to the savings fund. Company contributions are expensed in the year for which they are declared. AFG and many of its subsidiaries provide health care and life insurance benefits to eligible retirees. AFG also provides postemployment benefits to former or inactive employees (primarily those on disability) who were not deemed retired under other company plans. The projected future cost of providing these benefits is expensed over the period employees earn such benefits.

Earnings Per Share

Earnings Per Share   Although basic earnings per share only considers shares of common stock outstanding during the period, the calculation of diluted earnings per share includes the following adjustments to weighted average common shares related to stock-based compensation plans: 2017 – 2.0 million, 2016 – 1.6 million and 2015 – 1.8 million.

AFG’s weighted average diluted shares outstanding excludes the following anti-dilutive potential common shares related to stock compensation plans: 2017 – none, 2016 – 0.4 million and 2015 – 1.1 million. Adjustments to net earnings attributable to shareholders in the calculation of diluted earnings per share were nominal in the 2017, 2016 and 2015 periods.

Statement of Cash Flows

Statement of Cash Flows   For cash flow purposes, “investing activities” are defined as making and collecting loans and acquiring and disposing of debt or equity instruments and property and equipment. “Financing activities” include obtaining resources from owners and providing them with a return on their investments, borrowing money and repaying amounts borrowed. Annuity receipts, surrenders, benefits and withdrawals are also reflected as financing activities. All other activities are considered “operating.” Short-term investments having original maturities of three months or less when purchased are considered to be cash equivalents for purposes of the financial statements.

Effective October 1, 2016, AFG early adopted (on a retrospective basis) ASU 2016-15, which addresses the diversity in practice in how certain cash receipts and cash payments are presented in the statement of cash flows. Among other things, this guidance requires proceeds received from the settlement of corporate-owned life insurance policies to be classified as cash inflows from investing activities and allows premiums paid for policies to be reported as cash outflows either from investing activities or operating activities. AFG has elected to show all corporate-owned life insurance activity in investing activities. Prior to adoption of this guidance, AFG accounted for these transactions as operating activities. In addition, ASU 2016-15 clarifies when distributions received from investees accounted under the equity method should be accounted for as a cash inflow from operating activities or as a cash inflow from investing activities. AFG had previously accounted for all distributions from investments accounted for under the equity method as investing activities. The new guidance solely related to the presentation of certain transactions in the statement of cash flows. Accordingly, adoption of this guidance did not impact AFG’s results of operations or financial position.

Revenue Recognition Guidance Effective in 2018

Revenue Recognition Guidance Effective in 2018 In May 2014, the FASB issued ASU 2014-09, which requires an entity to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. Revenue is recognized when (or as) the entity satisfies a performance obligation under the contract. The new guidance also updates the accounting for certain costs associated with obtaining and fulfilling contracts with customers and requires disclosures regarding the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. Revenue recognition for insurance contracts and financial instruments, which are AFG’s primary sources of revenue, is excluded from the scope of the new guidance. AFG will adopt the new guidance effective January 1, 2018. Because the new guidance would have applied to 2% of AFG’s 2017 consolidated revenues and the impact of the new guidance on the recognition of those revenues would not have been material, management does not expect the new guidance to have a material impact on AFG’s results of operations and financial position.

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Acquisitions and Sale of Businesses (Tables)

12 Months Ended

Dec. 31, 2017

Business Combinations [Abstract]

Summarized financial information

The impact of the sale of the run-off long-term care insurance business is shown below (in millions):

	December 24, 2015
Net sale proceeds (*)				$	13
Assets of businesses sold:
Cash and investments	$	1,334
Recoverables from reinsurers	630
Deferred policy acquisition costs	16
Other receivables	16
Other assets	(4		)
Goodwill	2
Total assets				1,994
Liabilities of businesses sold:
Annuity benefits accumulated	261
Life, accident and health reserves	1,525
Other liabilities	7
Total liabilities				1,793
Reclassify net unrealized gain on marketable securities				22
Net assets of businesses sold				179
Loss on subsidiaries, pretax				(166		)
Tax benefit				58
Loss on subsidiaries, net of tax				$	(108	)

(*) Includes the fair value of the potential additional consideration and capital maintenance agreement and is shown net of estimated expenses.

Revenues, costs and expenses, and earnings before income taxes for the subsidiaries sold were (in millions):

	Year ended
	December 31, 2015
Life, accident and health net earned premiums:
Long-term care	$	73
Life operations	11
Net investment income	73
Realized gains (losses) on securities and other income	(11		)
Total revenues	146
Annuity benefits	8
Life, accident and health benefits:
Long-term care	91
Life operations	11
Annuity and supplemental insurance acquisition expenses	12
Other expenses	16
Total costs and expenses	138
Earnings before income taxes	$	8

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Segments of Operations (Tables)

12 Months Ended

Dec. 31, 2017

Segment Reporting [Abstract]

Segment Reporting Information, by Segment

The following tables (in millions) show AFG’s assets, revenues and earnings before income taxes by segment and sub-segment.

	2017		2016		2015
Assets
Property and casualty insurance (a)	$	17,171	$	15,574	$	14,689
Annuity	37,179		33,409		29,865
Run-off long-term care and life	730		752		772
Other	5,578		5,337		4,511
Total assets	$	60,658	$	55,072	$	49,837

Revenues
Property and casualty insurance:
Premiums earned:
Specialty
Property and transportation	$	1,711	$	1,662	$	1,599
Specialty casualty	2,186		2,006		2,011
Specialty financial	576		557		517
Other specialty	106		103		97
Total premiums earned	4,579		4,328		4,224
Net investment income	362		350		319
Other income (b)	28		51		78
Total property and casualty insurance	4,969		4,729		4,621
Annuity:
Net investment income	1,458		1,356		1,224
Other income	103		103		98
Total annuity	1,561		1,459		1,322
Run-off long-term care and life (c)	47		49		188
Other	283		240		194
Total revenues before realized gains (losses)	6,860		6,477		6,325
Realized gains (losses) on securities	5		19		(19		)
Realized gains (losses) on subsidiaries	—		2		(161		)
Total revenues	$	6,865	$	6,498	$	6,145

(a) Not allocable to sub-segments.

(b) Includes income of $32 million (before noncontrolling interest) from the sale of an apartment property in 2016 and $66 million (before noncontrolling interest) from the sales of a hotel and an apartment property in 2015.

(c) AFG sold substantially all of its run-off long-term care insurance business in December 2015.

	2017			2016			2015
Earnings Before Income Taxes
Property and casualty insurance:
Underwriting:
Specialty
Property and transportation	$	154		$	166		$	48
Specialty casualty	104			78			146
Specialty financial	61			84			87
Other specialty	(2		)	9			14
Other lines (a)	(75		)	(101		)	(70		)
Total underwriting	242			236			225
Investment and other income, net (b)	349			341			351
Total property and casualty insurance	591			577			576
Annuity	380			368			331
Run-off long-term care and life (c)	6			2			14
Other (d)	(258		)	(181		)	(176		)
Total earnings before realized gains (losses) and income taxes	719			766			745
Realized gains (losses) on securities	5			19			(19		)
Realized gains (losses) on subsidiaries	—			2			(161		)
Total earnings before income taxes	$	724		$	787		$	565

(a) Includes special charges to increase asbestos and environmental (“A&E”) reserves of $89 million, $36 million and $67 million in 2017, 2016 and 2015, respectively. Also includes $18 million in favorable development related to the Neon exited lines recorded in connection with a reinsurance to close transaction in 2017 and a charge of $65 million related to Neon exited lines in 2016.

(b) Includes income of $32 million (before noncontrolling interest) from the sale of an apartment property in 2016 and $66 million (before noncontrolling interest) from the sales of a hotel and an apartment property in 2015.

(c) AFG sold substantially all of its run-off long-term care insurance business in December 2015.

(d) Primarily holding company interest and expenses, including losses on retirement of debt of $51 million in 2017 and $4 million in 2015, and special charges to increase A&E reserves related to AFG’s former railroad and manufacturing operations ($24 million in 2017, $5 million in 2016 and $12 million in 2015).

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Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2017

Fair Value Disclosures [Abstract]

Assets and liabilities measured at fair value

Assets and liabilities measured and carried at fair value in the financial statements are summarized below (in millions):

	Level 1		Level 2			Level 3		Total
December 31, 2017
Assets:
Available for sale (“AFS”) fixed maturities:
U.S. Government and government agencies	$	122	$	112		$	8	$	242
States, municipalities and political subdivisions	—		6,975			148		7,123
Foreign government	—		127			—		127
Residential MBS	—		3,105			122		3,227
Commercial MBS	—		926			36		962
Asset-backed securities (“ABS”)	—		7,218			744		7,962
Corporate and other	30		17,662			1,044		18,736
Total AFS fixed maturities	152		36,125			2,102		38,379
Trading fixed maturities	44		304			—		348
Equity securities — AFS and trading	1,411		86			165		1,662
Assets of managed investment entities (“MIE”)	307		4,572			23		4,902
Variable annuity assets (separate accounts) (*)	—		644			—		644
Equity index call options	—		701			—		701
Other assets — derivatives	—		—			—		—
Total assets accounted for at fair value	$	1,914	$	42,432		$	2,290	$	46,636
Liabilities:
Liabilities of managed investment entities	$	293	$	4,372		$	22	$	4,687
Derivatives in annuity benefits accumulated	—		—			2,542		2,542
Other liabilities — derivatives	—		35			—		35
Total liabilities accounted for at fair value	$	293	$	4,407		$	2,564	$	7,264
December 31, 2016
Assets:
Available for sale fixed maturities:
U.S. Government and government agencies	$	133	$	174		$	8	$	315
States, municipalities and political subdivisions	—		6,641			140		6,781
Foreign government	—		136			—		136
Residential MBS	—		3,445			190		3,635
Commercial MBS	—		1,468			25		1,493
Asset-backed securities	—		5,475			484		5,959
Corporate and other	29		15,484			712		16,225
Total AFS fixed maturities	162		32,823			1,559		34,544
Trading fixed maturities	30		329			—		359
Equity securities — AFS and trading	1,305		79			174		1,558
Assets of managed investment entities	380		4,356			29		4,765
Variable annuity assets (separate accounts) (*)	—		600			—		600
Equity index call options	—		492			—		492
Other assets — derivatives	—		1			—		1
Total assets accounted for at fair value	$	1,877	$	38,680		$	1,762	$	42,319
Liabilities:
Liabilities of managed investment entities	$	363	$	4,158		$	28	$	4,549
Derivatives in annuity benefits accumulated	—		—			1,759		1,759
Derivatives in long-term debt	—		(1		)	—		(1		)
Other liabilities — derivatives	—		30			—		30
Total liabilities accounted for at fair value	$	363	$	4,187		$	1,787	$	6,337

 (*)   Variable annuity liabilities equal the fair value of variable annuity assets.

Fair value measurements, Levels 1 and 2 transfers

The transfers between Level 1 and Level 2 for the years ended December 31, 2017, 2016 and 2015 are reflected in the table below at fair value as of the end of the reporting period (dollars in millions):

	Level 2 To Level 1 Transfers									Level 1 To Level 2 Transfers
	# of Transfers			Fair Value						# of Transfers			Fair Value
	2017	2016	2015	2017		2016		2015		2017	2016	2015	2017		2016		2015
Perpetual preferred stocks	4	6	5	$	23	$	35	$	19	2	7	7	$	11	$	28	$	31
Common stocks	—	3	7	—		—		80		1	2	—	—		—		—
Redeemable preferred stocks	—	—	2	—		—		11		—	—	—	—		—		—

Unobservable inputs used by management in determining fair value of embedded derivatives

The following table presents information about the unobservable inputs used by management in determining fair value of these embedded derivatives. See Note F — “Derivatives.”

Unobservable Input	Range
Adjustment for insurance subsidiary’s credit risk	0.2% – 2.0% over the risk free rate
Risk margin for uncertainty in cash flows	0.70% reduction in the discount rate
Surrenders	3% – 23% of indexed account value
Partial surrenders	2% – 10% of indexed account value
Annuitizations	0.1% – 1% of indexed account value
Deaths	1.6% – 8.0% of indexed account value
Budgeted option costs	2.4% – 3.6% of indexed account value

Changes in asset balances of Level 3 financial assets

Changes in balances of Level 3 financial assets and liabilities carried at fair value during 2017, 2016 and 2015 are presented below (in millions). The transfers into and out of Level 3 were due to changes in the availability of market observable inputs. All transfers are reflected in the table at fair value as of the end of the reporting period.

				Total realized/unrealized gains (losses) included in
	Balance at December 31, 2016			Net earnings			Other comprehensive income (loss)		Purchases and issuances			Sales and settlements			Transfer into Level 3		Transfer out of Level 3			Balance at December 31, 2017
AFS fixed maturities:
U.S. government agency	$	8		$	—		$	—	$	—		$	—		$	—	$	—		$	8
State and municipal	140			—			2		—			(2		)	10		(2		)	148
Residential MBS	190			(4		)	2		1			(40		)	44		(71		)	122
Commercial MBS	25			2			—		15			(10		)	4		—			36
Asset-backed securities	484			—			1		410			(132		)	202		(221		)	744
Corporate and other	712			(5		)	2		606			(237		)	29		(63		)	1,044
Total AFS fixed maturities	1,559			(7		)	7		1,032			(421		)	289		(357		)	2,102
Equity securities	174			(21		)	10		38			(16		)	—		(20		)	165
Assets of MIE	29			(11		)	—		9			—			—		(4		)	23
Total Level 3 assets	$	1,762		$	(39	)	$	17	$	1,079		$	(437	)	$	289	$	(381	)	$	2,290
Embedded derivatives (a)	$	(1,759	)	$	(589	)	$	—	$	(300	)	$	106		$	—	$	—		$	(2,542	)
Total Level 3 liabilities (b)	$	(1,759	)	$	(589	)	$	—	$	(300	)	$	106		$	—	$	—		$	(2,542	)

(a) Total realized/unrealized gains (losses) included in net earnings for the embedded derivatives reflects losses related to the unlocking of actuarial assumptions of $25 million in 2017.

(b) As previously discussed, these tables exclude the portion of MIE liabilities allocated to Level 3, which are derived from the fair value of the MIE assets.

				Total realized/unrealized gains (losses) included in
	Balance at December 31, 2015			Net earnings			Other comprehensive income (loss)			Purchases and issuances			Sales and settlements			Transfer into Level 3		Transfer out of Level 3			Balance at December 31, 2016
AFS fixed maturities:
U.S. government agency	$	15		$	(8	)	$	1		$	—		$	—		$	—	$	—		$	8
State and municipal	89			—			(4		)	57			(2		)	—		—			140
Residential MBS	224			(4		)	(2		)	8			(28		)	34		(42		)	190
Commercial MBS	39			(1		)	—			—			(7		)	—		(6		)	25
Asset-backed securities	470			(1		)	1			50			(52		)	60		(44		)	484
Corporate and other	633			—			(10		)	176			(100		)	30		(17		)	712
Total AFS fixed maturities	1,470			(14		)	(14		)	291			(189		)	124		(109		)	1,559
Equity securities	140			(12		)	35			44			(28		)	15		(20		)	174
Assets of MIE	26			(9		)	—			12			—			—		—			29
Total Level 3 assets	$	1,636		$	(35	)	$	21		$	347		$	(217	)	$	139	$	(129	)	$	1,762
Embedded derivatives (a)	$	(1,369	)	$	(211	)	$	—		$	(277	)	$	98		$	—	$	—		$	(1,759	)
Total Level 3 liabilities (b)	$	(1,369	)	$	(211	)	$	—		$	(277	)	$	98		$	—	$	—		$	(1,759	)

(a) Total realized/unrealized gains (losses) included in net earnings for the embedded derivatives reflects losses related to the unlocking of actuarial assumptions of $17 million in 2016.

(b) As previously discussed, these tables exclude the portion of MIE liabilities allocated to Level 3, which are derived from the fair value of the MIE assets.

						Total realized/unrealized gains (losses) included in
	Bal. at Dec. 31, 2014			Impact of accounting change (b)		Net earnings			Other comprehensive income (loss)			Purchases and issuances			Sales and settlements			Transfer into Level 3		Transfer out of Level 3			Sale of subsidiaries			Bal. at Dec. 31, 2015
AFS fixed maturities:
U.S. government agency	$	15		$	—	$	—		$	—		$	—		$	—		$	—	$	—		$	—		$	15
State and municipal	100			—		—			(1		)	34			(1		)	2		(39		)	(6		)	89
Residential MBS	300			—		(11		)	(1		)	—			(34		)	86		(88		)	(28		)	224
Commercial MBS	44			—		(1		)	(1		)	—			(2		)	4		(1		)	(4		)	39
Asset-backed securities	226			—		1			(7		)	265			(56		)	53		(10		)	(2		)	470
Corporate and other	546			—		(5		)	(9		)	161			(90		)	41		(5		)	(6		)	633
Total AFS fixed maturities	1,231			—		(16		)	(19		)	460			(183		)	186		(143		)	(46		)	1,470
Equity securities	93			—		(4		)	(9		)	77			—			—		(17		)	—			140
Assets of MIE	31			—		(11		)	—			6			—			—		—			—			26
Total Level 3 assets	$	1,355		$	—	$	(31	)	$	(28	)	$	543		$	(183	)	$	186	$	(160	)	$	(46	)	$	1,636
Liabilities of MIE	$	(2,701	)	$	2,701	$	—		$	—		$	—		$	—		$	—	$	—		$	—		$	—
Embedded derivatives (a)	(1,160		)	—		(17		)	—			(257		)	65			—		—			—			(1,369		)
Total Level 3 liabilities	$	(3,861	)	$	2,701	$	(17	)	$	—		$	(257	)	$	65		$	—	$	—		$	—		$	(1,369	)

(a) Total realized/unrealized gains (losses) included in net earnings for the embedded derivatives reflects losses related to the unlocking of actuarial assumptions of $28 million in 2015.

(b) The impact of implementing new guidance adopted in 2015, as discussed in Note A — “Accounting Policies — Managed Investment Entities.”

Changes in liability balances of Level 3 financial liabilities

Changes in balances of Level 3 financial assets and liabilities carried at fair value during 2017, 2016 and 2015 are presented below (in millions). The transfers into and out of Level 3 were due to changes in the availability of market observable inputs. All transfers are reflected in the table at fair value as of the end of the reporting period.

				Total realized/unrealized gains (losses) included in
	Balance at December 31, 2016			Net earnings			Other comprehensive income (loss)		Purchases and issuances			Sales and settlements			Transfer into Level 3		Transfer out of Level 3			Balance at December 31, 2017
AFS fixed maturities:
U.S. government agency	$	8		$	—		$	—	$	—		$	—		$	—	$	—		$	8
State and municipal	140			—			2		—			(2		)	10		(2		)	148
Residential MBS	190			(4		)	2		1			(40		)	44		(71		)	122
Commercial MBS	25			2			—		15			(10		)	4		—			36
Asset-backed securities	484			—			1		410			(132		)	202		(221		)	744
Corporate and other	712			(5		)	2		606			(237		)	29		(63		)	1,044
Total AFS fixed maturities	1,559			(7		)	7		1,032			(421		)	289		(357		)	2,102
Equity securities	174			(21		)	10		38			(16		)	—		(20		)	165
Assets of MIE	29			(11		)	—		9			—			—		(4		)	23
Total Level 3 assets	$	1,762		$	(39	)	$	17	$	1,079		$	(437	)	$	289	$	(381	)	$	2,290
Embedded derivatives (a)	$	(1,759	)	$	(589	)	$	—	$	(300	)	$	106		$	—	$	—		$	(2,542	)
Total Level 3 liabilities (b)	$	(1,759	)	$	(589	)	$	—	$	(300	)	$	106		$	—	$	—		$	(2,542	)

(a) Total realized/unrealized gains (losses) included in net earnings for the embedded derivatives reflects losses related to the unlocking of actuarial assumptions of $25 million in 2017.

(b) As previously discussed, these tables exclude the portion of MIE liabilities allocated to Level 3, which are derived from the fair value of the MIE assets.

				Total realized/unrealized gains (losses) included in
	Balance at December 31, 2015			Net earnings			Other comprehensive income (loss)			Purchases and issuances			Sales and settlements			Transfer into Level 3		Transfer out of Level 3			Balance at December 31, 2016
AFS fixed maturities:
U.S. government agency	$	15		$	(8	)	$	1		$	—		$	—		$	—	$	—		$	8
State and municipal	89			—			(4		)	57			(2		)	—		—			140
Residential MBS	224			(4		)	(2		)	8			(28		)	34		(42		)	190
Commercial MBS	39			(1		)	—			—			(7		)	—		(6		)	25
Asset-backed securities	470			(1		)	1			50			(52		)	60		(44		)	484
Corporate and other	633			—			(10		)	176			(100		)	30		(17		)	712
Total AFS fixed maturities	1,470			(14		)	(14		)	291			(189		)	124		(109		)	1,559
Equity securities	140			(12		)	35			44			(28		)	15		(20		)	174
Assets of MIE	26			(9		)	—			12			—			—		—			29
Total Level 3 assets	$	1,636		$	(35	)	$	21		$	347		$	(217	)	$	139	$	(129	)	$	1,762
Embedded derivatives (a)	$	(1,369	)	$	(211	)	$	—		$	(277	)	$	98		$	—	$	—		$	(1,759	)
Total Level 3 liabilities (b)	$	(1,369	)	$	(211	)	$	—		$	(277	)	$	98		$	—	$	—		$	(1,759	)

(a) Total realized/unrealized gains (losses) included in net earnings for the embedded derivatives reflects losses related to the unlocking of actuarial assumptions of $17 million in 2016.

(b) As previously discussed, these tables exclude the portion of MIE liabilities allocated to Level 3, which are derived from the fair value of the MIE assets.

						Total realized/unrealized gains (losses) included in
	Bal. at Dec. 31, 2014			Impact of accounting change (b)		Net earnings			Other comprehensive income (loss)			Purchases and issuances			Sales and settlements			Transfer into Level 3		Transfer out of Level 3			Sale of subsidiaries			Bal. at Dec. 31, 2015
AFS fixed maturities:
U.S. government agency	$	15		$	—	$	—		$	—		$	—		$	—		$	—	$	—		$	—		$	15
State and municipal	100			—		—			(1		)	34			(1		)	2		(39		)	(6		)	89
Residential MBS	300			—		(11		)	(1		)	—			(34		)	86		(88		)	(28		)	224
Commercial MBS	44			—		(1		)	(1		)	—			(2		)	4		(1		)	(4		)	39
Asset-backed securities	226			—		1			(7		)	265			(56		)	53		(10		)	(2		)	470
Corporate and other	546			—		(5		)	(9		)	161			(90		)	41		(5		)	(6		)	633
Total AFS fixed maturities	1,231			—		(16		)	(19		)	460			(183		)	186		(143		)	(46		)	1,470
Equity securities	93			—		(4		)	(9		)	77			—			—		(17		)	—			140
Assets of MIE	31			—		(11		)	—			6			—			—		—			—			26
Total Level 3 assets	$	1,355		$	—	$	(31	)	$	(28	)	$	543		$	(183	)	$	186	$	(160	)	$	(46	)	$	1,636
Liabilities of MIE	$	(2,701	)	$	2,701	$	—		$	—		$	—		$	—		$	—	$	—		$	—		$	—
Embedded derivatives (a)	(1,160		)	—		(17		)	—			(257		)	65			—		—			—			(1,369		)
Total Level 3 liabilities	$	(3,861	)	$	2,701	$	(17	)	$	—		$	(257	)	$	65		$	—	$	—		$	—		$	(1,369	)

(a) Total realized/unrealized gains (losses) included in net earnings for the embedded derivatives reflects losses related to the unlocking of actuarial assumptions of $28 million in 2015.

(b) The impact of implementing new guidance adopted in 2015, as discussed in Note A — “Accounting Policies — Managed Investment Entities.”

Fair value of financial instruments

The carrying value and fair value of financial instruments that are not carried at fair value in the financial statements at December 31 are summarized below (in millions):

	Carrying		Fair Value
	Value		Total		Level 1		Level 2		Level 3
2017
Financial assets:
Cash and cash equivalents	$	2,338	$	2,338	$	2,338	$	—	$	—
Mortgage loans	1,125		1,119		—		—		1,119
Policy loans	184		184		—		—		184
Total financial assets not accounted for at fair value	$	3,647	$	3,641	$	2,338	$	—	$	1,303
Financial liabilities:
Annuity benefits accumulated (*)	$	33,110	$	32,461	$	—	$	—	$	32,461
Long-term debt	1,301		1,354		—		1,351		3
Total financial liabilities not accounted for at fair value	$	34,411	$	33,815	$	—	$	1,351	$	32,464
2016
Financial assets:
Cash and cash equivalents	$	2,107	$	2,107	$	2,107	$	—	$	—
Mortgage loans	1,147		1,146		—		—		1,146
Policy loans	192		192		—		—		192
Total financial assets not accounted for at fair value	$	3,446	$	3,445	$	2,107	$	—	$	1,338
Financial liabilities:
Annuity benefits accumulated (*)	$	29,703	$	28,932	$	—	$	—	$	28,932
Long-term debt	1,284		1,356		—		1,353		3
Total financial liabilities not accounted for at fair value	$	30,987	$	30,288	$	—	$	1,353	$	28,935

(*) Excludes $206 million and $204 million of life contingent annuities in the payout phase at December 31, 2017 and 2016, respectively.

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Investments (Tables)

12 Months Ended

Dec. 31, 2017

Investments, Debt and Equity Securities [Abstract]

Available for sale fixed maturities and equity securities

Available for sale fixed maturities and equity securities at December 31 consisted of the following (in millions):

	2017												2016
	Amortized Cost		Gross Unrealized					Net Unrealized			Fair Value		Amortized Cost		Gross Unrealized					Net Unrealized			Fair Value
			Gains		Losses										Gains		Losses
Fixed maturities:
U.S. Government and government agencies	$	244	$	1	$	(3	)	$	(2	)	$	242	$	315	$	3	$	(3	)	$	—		$	315
States, municipalities and political subdivisions	6,887		254		(18		)	236			7,123		6,650		200		(69		)	131			6,781
Foreign government	124		3		—			3			127		131		5		—			5			136
Residential MBS	2,884		349		(6		)	343			3,227		3,367		281		(13		)	268			3,635
Commercial MBS	927		36		(1		)	35			962		1,446		49		(2		)	47			1,493
Asset-backed securities	7,836		142		(16		)	126			7,962		5,962		43		(46		)	(3		)	5,959
Corporate and other	18,136		638		(38		)	600			18,736		15,864		473		(112		)	361			16,225
Total fixed maturities	$	37,038	$	1,423	$	(82	)	$	1,341		$	38,379	$	33,735	$	1,054	$	(245	)	$	809		$	34,544
Equity Securities:
Common stocks	$	786	$	263	$	(22	)	$	241		$	1,027	$	879	$	160	$	(23	)	$	137		$	1,016
Perpetual preferred stocks	535		39		(1		)	38			573		472		21		(7		)	14			486
Total equity securities	$	1,321	$	302	$	(23	)	$	279		$	1,600	$	1,351	$	181	$	(30	)	$	151		$	1,502

Available for sale securities in a continuous unrealized loss position

The following tables show gross unrealized losses (dollars in millions) on available for sale fixed maturities and equity securities by investment category and length of time that individual securities have been in a continuous unrealized loss position at December 31, 2017 and 2016.

	Less Than Twelve Months							Twelve Months or More
	Unrealized Loss			Fair Value		Fair Value as % of Cost		Unrealized Loss			Fair Value		Fair Value as % of Cost
2017
Fixed maturities:
U.S. Government and government agencies	$	—		$	55	100	%	$	(3	)	$	123	98	%
States, municipalities and political subdivisions	(8		)	825		99	%	(10		)	431		98	%
Foreign government	—			4		100	%	—			—		—	%
Residential MBS	(1		)	118		99	%	(5		)	118		96	%
Commercial MBS	(1		)	67		99	%	—			—		—	%
Asset-backed securities	(7		)	1,195		99	%	(9		)	299		97	%
Corporate and other	(20		)	2,031		99	%	(18		)	603		97	%
Total fixed maturities	$	(37	)	$	4,295	99	%	$	(45	)	$	1,574	97	%
Equity securities:
Common stocks	$	(22	)	$	117	84	%	$	—		$	—	—	%
Perpetual preferred stocks	—			41		100	%	(1		)	13		93	%
Total equity securities	$	(22	)	$	158	88	%	$	(1	)	$	13	93	%
2016
Fixed maturities:
U.S. Government and government agencies	$	(1	)	$	153	99	%	$	(2	)	$	8	80	%
States, municipalities and political subdivisions	(64		)	2,289		97	%	(5		)	44		90	%
Residential MBS	(7		)	502		99	%	(6		)	162		96	%
Commercial MBS	(2		)	121		98	%	—			—		—	%
Asset-backed securities	(29		)	1,737		98	%	(17		)	634		97	%
Corporate and other	(93		)	3,849		98	%	(19		)	312		94	%
Total fixed maturities	$	(196	)	$	8,651	98	%	$	(49	)	$	1,160	96	%
Equity securities:
Common stocks	$	(23	)	$	215	90	%	$	—		$	—	—	%
Perpetual preferred stocks	(6		)	135		96	%	(1		)	6		86	%
Total equity securities	$	(29	)	$	350	92	%	$	(1	)	$	6	86	%

Roll forward of cumulative credit portion of other-than-temporary impairments on fixed maturity securities

A progression of the credit portion of other-than-temporary impairments on fixed maturity securities for which the non-credit portion of an impairment has been recognized in other comprehensive income is shown below (in millions):

	2017			2016			2015
Balance at January 1	$	153		$	160		$	170
Additional credit impairments on:
Previously impaired securities	1			2			1
Securities without prior impairments	3			1			2
Reductions due to:
Sales or redemptions	(12		)	(10		)	(9		)
Sale of subsidiaries	—			—			(4		)
Balance at December 31	$	145		$	153		$	160

Available for sale fixed maturity securities by contractual maturity date

The table below sets forth the scheduled maturities of available for sale fixed maturities as of December 31, 2017 (dollars in millions). Securities with sinking funds are reported at average maturity. Actual maturities may differ from contractual maturities because certain securities may be called or prepaid by the issuers.

	Amortized		Fair Value
	Cost		Amount		%
Maturity
One year or less	$	746	$	759	2	%
After one year through five years	6,730		6,939		18	%
After five years through ten years	13,235		13,662		35	%
After ten years	4,680		4,868		13	%
	25,391		26,228		68	%
ABS (average life of approximately 5 years)	7,836		7,962		21	%
MBS (average life of approximately 4.5 years)	3,811		4,189		11	%
Total	$	37,038	$	38,379	100	%

Components of the net unrealized gain on securities, included in Accumulated Other Comprehensive Income

The following table shows (in millions) the components of the net unrealized gain on securities that is included in AOCI in AFG’s Balance Sheet.

	Pretax			Deferred Tax			Net
December 31, 2017
Net unrealized gain on:
Fixed maturities — annuity segment (a)	$	1,082		$	(227	)	$	855
Fixed maturities — all other	259			(55		)	204
Total fixed maturities	1,341			(282		)	1,059
Equity securities (b)	279			(58		)	221
Total investments	1,620			(340		)	1,280
Deferred policy acquisition costs — annuity segment	(433		)	91			(342		)
Annuity benefits accumulated	(137		)	29			(108		)
Unearned revenue	13			(3		)	10
Total net unrealized gain on marketable securities	$	1,063		$	(223	)	$	840
December 31, 2016
Net unrealized gain on:
Fixed maturities — annuity segment (a)	$	640		$	(224	)	$	416
Fixed maturities — all other	169			(59		)	110
Total fixed maturities	809			(283		)	526
Equity securities (b)	151			(53		)	98
Total investments	960			(336		)	624
Deferred policy acquisition costs — annuity segment	(273		)	96			(177		)
Annuity benefits accumulated	(78		)	27			(51		)
Unearned revenue	13			(5		)	8
Total net unrealized gain on marketable securities	$	622		$	(218	)	$	404

(a) Net unrealized gains on fixed maturity investments supporting AFG’s annuity benefits accumulated.

(b) As discussed in Note A — “Accounting Policies — Investments,” effective January 1, 2018, all equity securities currently classified as “available for sale” will be required to be carried at fair value through net earnings instead of AOCI.

Real estate and other investments included on the Balance Sheet

Real estate and other investments on AFG’s Balance Sheet includes the following at December 31 (in millions):

	2017		2016
Limited partnerships and similar investments accounted for using the equity method	$	999	$	688
Directly owned real estate	164		197
Other investments	148		149
Total real estate and other investments	$	1,311	$	1,034

Net investment income earned and investment expenses incurred

The following table shows (in millions) investment income earned and investment expenses incurred.

	2017			2016			2015
Investment income:
Fixed maturities	$	1,607		$	1,510		$	1,461
Equity securities	79			81			76
Equity in earnings of partnerships and similar investments	64			44			27
Other	102			81			87
Gross investment income	1,852			1,716			1,651
Investment expenses	(21		)	(20		)	(18		)
Net investment income	$	1,831		$	1,696		$	1,633

Realized gains (losses) and changes in unrealized appreciation (depreciation) related to fixed maturity and equity security investments

Realized gains (losses) and changes in unrealized appreciation (depreciation) related to fixed maturity and equity security investments are summarized as follows (in millions):

	2017												2016
	Realized gains (losses)												Realized gains (losses)
	Before Impairments			Impairments			Total			Change in Unrealized			Before Impairments			Impairments			Total			Change in Unrealized
Fixed maturities	$	17		$	(20	)	$	(3	)	$	532		$	36		$	(38	)	$	(2	)	$	90
Equity securities	70			(64		)	6			128			106			(93		)	13			67
Mortgage loans and other investments	(6		)	(4		)	(10		)	—			—			—			—			—
Other (*)	(3		)	15			12			(219		)	(7		)	15			8			(52		)
Total pretax	78			(73		)	5			441			135			(116		)	19			105
Tax effects	(27		)	25			(2		)	(5		)	(48		)	41			(7		)	(37		)
Noncontrolling interests	—			—			—			—			(2		)	3			1			4
Net of tax and noncontrolling interests	$	51		$	(48	)	$	3		$	436		$	85		$	(72	)	$	13		$	72

	2015
	Realized gains (losses)
	Before Impairments			Impairments			Total			Change in Unrealized
Fixed maturities	$	19		$	(43	)	$	(24	)	$	(941	)
Equity securities	94			(94		)	—			(134		)
Mortgage loans and other investments	(2		)	(3		)	(5		)	—
Other (*)	(5		)	15			10			430
Total pretax	106			(125		)	(19		)	(645		)
Tax effects	(38		)	45			7			226
Noncontrolling interests	(2		)	2			—			8
Net of tax and noncontrolling interests	$	66		$	(78	)	$	(12	)	$	(411	)

(*) Primarily adjustments to deferred policy acquisition costs and reserves related to the annuity business.

Gross realized gains and losses on available for sale fixed maturity and equity security investments

Gross realized gains and losses (excluding impairment write-downs and mark-to-market of derivatives) on available for sale fixed maturity and equity security investment transactions consisted of the following (in millions):

	2017			2016			2015
Fixed maturities:
Gross gains	$	43		$	55		$	38
Gross losses	(20		)	(10		)	(7		)
Equity securities:
Gross gains	87			110			99
Gross losses	(17		)	(4		)	(5		)

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Derivatives (Tables)

12 Months Ended

Dec. 31, 2017

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivatives included in Balance Sheet at fair value

The following derivatives that do not qualify for hedge accounting under GAAP are included in AFG’s Balance Sheet at fair value (in millions):

		December 31, 2017				December 31, 2016
Derivative	Balance Sheet Line	Asset		Liability		Asset		Liability
MBS with embedded derivatives	Fixed maturities	$	105	$	—	$	107	$	—
Public company warrants	Equity securities	4		—		4		—
Fixed-indexed annuities (embedded derivative)	Annuity benefits accumulated	—		2,542		—		1,759
Equity index call options	Equity index call options	701		—		492		—
Reinsurance contract (embedded derivative)	Other liabilities	—		4		—		8
		$	810	$	2,546	$	603	$	1,767

Summary of gain (loss) included in the Statement of Earnings for changes in the fair value of derivatives

The following table summarizes the gain (loss) included in AFG’s Statement of Earnings for changes in the fair value of derivatives that do not qualify for hedge accounting for 2017, 2016 and 2015 (in millions):

Derivative	Statement of Earnings Line	2017			2016			2015
MBS with embedded derivatives	Realized gains (losses) on securities	$	(6	)	$	(9	)	$	(16	)
Public company warrants	Realized gains (losses) on securities	—			—			—
Fixed-indexed annuities (embedded derivative) (*)	Annuity benefits	(589		)	(211		)	(17		)
Equity index call options	Annuity benefits	494			141			(56		)
Reinsurance contracts (embedded derivative)	Net investment income	(2		)	(1		)	6
		$	(103	)	$	(80	)	$	(83	)

(*) The change in fair value of the embedded derivative includes losses related to unlocking of actuarial assumptions of $25 million in 2017 compared to $17 million in 2016 and $28 million in 2015.

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Deferred Policy Acquisition Costs (Tables)

12 Months Ended

Dec. 31, 2017

Deferred Policy Acquisition Costs Disclosures [Abstract]

Deferred Policy Acquisition Costs Details

A progression of deferred policy acquisition costs is presented below (in millions):

	P&C			Annuity and Run-off Long-term Care and Life
	Deferred			Deferred			Sales															Consolidated
	Costs			Costs			Inducements			PVFP			Subtotal			Unrealized (*)			Total			Total
Balance at December 31, 2014	$	221		$	925		$	132		$	74		$	1,131		$	(531	)	$	600		$	821
Additions	519			224			11			—			235			—			235			754
Amortization:
Periodic amortization	(511		)	(162		)	(26		)	(11		)	(199		)	—			(199		)	(710		)
Annuity unlocking	—			31			4			—			35			—			35			35
Included in realized gains	—			8			1			—			9			—			9			9
Sale of subsidiaries	—			(8		)	(3		)	(8		)	(19		)	—			(19		)	(19		)
Foreign currency translation	(3		)	—			—			—			—			—			—			(3		)
Change in unrealized	—			—			—			—			—			297			297			297
Balance at December 31, 2015	226			1,018			119			55			1,192			(234		)	958			1,184
Additions	535			230			9			—			239			—			239			774
Amortization:
Periodic amortization	(520		)	(169		)	(24		)	(9		)	(202		)	—			(202		)	(722		)
Annuity unlocking	—			25			4			—			29			—			29			29
Included in realized gains	—			6			2			—			8			—			8			8
Foreign currency translation	(3		)	—			—			—			—			—			—			(3		)
Change in unrealized	—			—			—			—			—			(31		)	(31		)	(31		)
Balance at December 31, 2016	238			1,110			110			46			1,266			(265		)	1,001			1,239
Additions	588			225			4			—			229			—			229			817
Amortization:
Periodic amortization	(556		)	(161		)	(19		)	(8		)	(188		)	—			(188		)	(744		)
Annuity unlocking	—			34			6			1			41			—			41			41
Included in realized gains	—			9			1			—			10			—			10			10
Foreign currency translation	—			—			—			—			—			—			—			—
Other	—			—			—			10			10			—			10			10
Change in unrealized	—			—			—			—			—			(157		)	(157		)	(157		)
Balance at December 31, 2017	$	270		$	1,217		$	102		$	49		$	1,368		$	(422	)	$	946		$	1,216

(*) Unrealized adjustments to DPAC includes net unrealized gains/losses on securities and net unrealized gains/losses on cash flow hedges.

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Managed Investment Entities (Tables)

12 Months Ended

Dec. 31, 2017

Variable Interest Entity, Primary Beneficiary, Does Not Hold Majority Voting Interest, Disclosures [Abstract]

Selected financial information related to collateralized loan obligations

Selected financial information related to the CLOs is shown below (in millions):

	Year ended December 31,
	2017			2016			2015
Investment in CLO tranches	$	215		$	216		$	266
Gains (losses) on change in fair value of assets/liabilities (a):
Assets	(8		)	131			(116		)
Liabilities	20			(116		)	82
Management fees paid to AFG	18			17			15
CLO earnings (losses) attributable to AFG Shareholders (b)	23			37			(6		)

(a) Included in revenues in AFG’s Statement of Earnings.

(b) Included in earnings before income taxes in AFG’s Statement of Earnings.

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Goodwill and Other Intangibles (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in the carrying value of goodwill by reporting segment

Changes in the carrying value of goodwill during 2015, 2016 and 2017, by reporting segment, are presented in the following table (in millions):

	Property and Casualty		Annuity			Total
Balance at January 1, 2015	$	168	$	33		$	201
Sale of subsidiaries in 2015	—		(2		)	(2		)
Balance at December 31, 2015, December 31, 2016 and December 31, 2017	$	168	$	31		$	199

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Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2017

Debt Disclosure [Abstract]

Schedule of long-term debt instruments

Long-term debt consisted of the following at December 31 (in millions):

	2017							2016
	Principal		Discount and Issue Costs			Carrying Value		Principal		Discount and Issue Costs			Carrying Value
Direct Senior Obligations of AFG:
4.50% Senior Notes due June 2047	$	590	$	(2	)	$	588	$	—	$	—		$	—
3.50% Senior Notes due August 2026	425		(5		)	420		300		(3		)	297
9-7/8% Senior Notes due June 2019	—		—			—		350		(1		)	349
6-3/8% Senior Notes due June 2042	—		—			—		230		(7		)	223
5-3/4% Senior Notes due August 2042	—		—			—		125		(4		)	121
Other	3		—			3		3		—			3
	1,018		(7		)	1,011		1,008		(15		)	993
Direct Subordinated Obligations of AFG:
6-1/4% Subordinated Debentures due September 2054	150		(5		)	145		150		(5		)	145
6% Subordinated Debentures due November 2055	150		(5		)	145		150		(5		)	145
	300		(10		)	290		300		(10		)	290
	$	1,318	$	(17	)	$	1,301	$	1,308	$	(25	)	$	1,283

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Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2017

Stockholders' Equity Note [Abstract]

Summary of restricted stock awards activity

The restricted Common Stock that AFG has granted generally vests over a three or four year period. Data relating to grants of restricted stock is presented below:

	Shares		Average Grant Date Fair Value
Outstanding at January 1, 2017	678,875		$	60.90
Granted	232,250		$	94.44
Vested	(145,473	)	$	48.76
Forfeited	(6,617	)	$	71.30
Outstanding at December 31, 2017	759,035		$	73.40

Summary of stock options activity

Data for stock options issued under AFG’s stock incentive plans is presented below:

	Shares		Average Exercise Price		Average Remaining Contractual Term	Aggregate Intrinsic Value (in millions)
Outstanding at January 1, 2017	4,505,101		$	43.02
Exercised	(1,020,986	)	$	33.38
Forfeited/Cancelled	(16,775	)	$	55.82
Outstanding at December 31, 2017	3,467,340		$	45.80	4.9 years	$	218
Options exercisable at December 31, 2017	2,589,277		$	42.00	4.4 years	$	172

Assumptions used in estimating weighted average fair value of options on grant date

The risk-free rate for periods associated with the expected term is based upon the U.S. Treasury yield curve in effect on the grant date.

	2015
Exercise price	$	63.15
Expected dividend yield	1.6		%
Expected volatility	25		%
Expected term (in years)	7.25
Risk-free rate	1.88		%
Grant date fair value	$	15.29

Components of accumulated other comprehensive income (loss)

The progression of the components of accumulated other comprehensive income follows (in millions):

				Other Comprehensive Income
	AOCI Beginning Balance			Pretax			Tax			Net of tax			Attributable to noncontrolling interests			Attributable to shareholders			Other (c)			AOCI Ending Balance
Year ended December 31, 2017
Net unrealized gains on securities:
Unrealized holding gains on securities arising during the period				$	456		$	(159	)	$	297		$	—		$	297
Reclassification adjustment for realized (gains) losses included in net earnings (a)				(15		)	5			(10		)	—			(10		)
Total net unrealized gains on securities (b)	$	404		441			(154		)	287			—			287			$	149		$	840
Net unrealized losses on cash flow hedges	(7		)	(6		)	2			(4		)	—			(4		)	(2		)	(13		)
Foreign currency translation adjustments	(15		)	9			3			12			—			12			(3		)	(6		)
Pension and other postretirement plans adjustments	(7		)	1			—			1			—			1			(2		)	(8		)
Total	$	375		$	445		$	(149	)	$	296		$	—		$	296		$	142		$	813
Year ended December 31, 2016
Net unrealized gains on securities:
Unrealized holding gains on securities arising during the period				$	124		$	(44	)	$	80		$	(4	)	$	76
Reclassification adjustment for realized (gains) losses included in net earnings (a)				(19		)	7			(12		)	(1		)	(13		)
Total net unrealized gains on securities (b)	$	332		105			(37		)	68			(5		)	63			$	9		$	404
Net unrealized gains (losses) on cash flow hedges	1			(12		)	4			(8		)	—			(8		)	—			(7		)
Foreign currency translation adjustments	(22		)	6			1			7			—			7			—			(15		)
Pension and other postretirement plans adjustments	(7		)	—			—			—			—			—			—			(7		)
Total	$	304		$	99		$	(32	)	$	67		$	(5	)	$	62		$	9		$	375
Year ended December 31, 2015
Net unrealized gains (losses) on securities:
Unrealized holding losses on securities arising during the period				$	(625	)	$	219		$	(406	)	$	9		$	(397	)
Reclassification adjustment for realized (gains) losses included in net earnings (a)				14			(5		)	9			(1		)	8
Reclassification for unrealized gains of subsidiaries sold				(34		)	12			(22		)	—			(22		)
Total net unrealized gains (losses) on securities (b)	$	743		(645		)	226			(419		)	8			(411		)	$	—		$	332
Net unrealized gains on cash flow hedges	—			1			—			1			—			1			—			1
Foreign currency translation adjustments	(8		)	(9		)	(5		)	(14		)	—			(14		)	—			(22		)
Pension and other postretirement plans adjustments	(8		)	1			—			1			—			1			—			(7		)
Total	$	727		$	(652	)	$	221		$	(431	)	$	8		$	(423	)	$	—		$	304

(a)    The reclassification adjustment out of net unrealized gains on securities affected the following lines in AFG’s Statement of Earnings:

OCI component	Affected line in the statement of earnings
Pretax	Realized gains (losses) on securities
Tax	Provision for income taxes
Attributable to noncontrolling interests	Net earnings attributable to noncontrolling interests

(b) Includes net unrealized gains of $68 million at December 31, 2017 compared to net unrealized gains of $52 million and $51 million at December 31, 2016 and 2015, related to securities for which only the credit portion of an other-than-temporary impairment has been recorded in earnings.

(c) Other includes the December 2017 reclassification of $145 million stranded in AOCI from accounting for the Tax Cuts and Jobs Act of 2017 to retained earnings (see Note A — “Accounting Policies — Income Taxes”), and the impact on AOCI of the December 2017 sale of redeemable noncontrolling interests in Neon and the November 2016 acquisition of the noncontrolling interest in NATL (see Note B — “Acquisitions and Sale of Businesses”).

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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Income Tax Disclosure [Abstract]

Reconciliation of income taxes at the statutory rate and income taxes shown in the Statement of Earnings

The following is a reconciliation of income taxes at the statutory rate of 35% to the provision for income taxes as shown in AFG’s Statement of Earnings (dollars in millions):

	2017					2016					2015
	Amount			% of EBT		Amount			% of EBT		Amount			% of EBT
Earnings before income taxes (“EBT”)	$	724				$	787				$	565
Income taxes at statutory rate	$	253		35	%	$	275		35	%	$	198		35	%
Effect of:
Tax exempt interest	(23		)	(3	%)	(24		)	(3	%)	(27		)	(5	%)
Dividend received deduction	(8		)	(1	%)	(7		)	(1	%)	(8		)	(1	%)
Stock-based compensation	(16		)	(2	%)	(9		)	(1	%)	1			—	%
Employee stock ownership plan dividend paid deduction	(5		)	(1	%)	(2		)	—	%	(1		)	—	%
Foreign operations	21			3	%	5			—	%	3			1	%
Change in valuation allowance (excluding change in tax rate)	(7		)	(1	%)	52			7	%	23			4	%
Subsidiaries not in AFG’s tax return	—			—	%	3			—	%	2			—	%
Neon restructuring	(56		)	(8	%)	(111		)	(14	%)	—			—	%
Change in U.S corporate tax rate	83			11	%	—			—	%	—			—	%
Acquisition of noncontrolling interest in NATL	—			—	%	(66		)	(8	%)	—			—	%
Other	5			1	%	3			—	%	4			1	%
Provision for income taxes as shown in the statement of earnings	$	247		34	%	$	119		15	%	$	195		35	%

Components of income tax provision (credit)

The total income tax provision (credit) consists of (in millions):

	2017		2016			2015
Current taxes:
Federal	$	153	$	299		$	216
State	6		12			8
Deferred taxes:
Federal	5		(192		)	(29		)
Impact of change in U.S. corporate tax rate	83		—			—
Total Federal deferred taxes	88		(192		)	(29		)
Provision for income taxes	$	247	$	119		$	195

Summary of operating loss carryforwards

For income tax purposes, AFG and its subsidiaries had the following carryforwards available at December 31, 2017 (in millions):

	Expiring	Amount
Operating Loss – U.S.	2018 - 2022	$	130
Operating Loss – United Kingdom	indefinite	252		(*)
Capital Loss – U.S.	2022	109

(*) £186 million

Components of deferred tax assets and liabilities

Deferred income tax assets and liabilities reflect temporary differences between the carrying amounts of assets and liabilities recognized for financial reporting purposes and the amounts recognized for tax purposes. The significant components of deferred tax assets and liabilities included in AFG’s Balance Sheet at December 31 were as follows (in millions):

	2017									2016
	Excluding Unrealized Gains			Impact of Unrealized Gains			Total			Excluding Unrealized Gains			Impact of Unrealized Gains			Total
Deferred tax assets:
Federal net operating loss carryforwards	$	27		$	—		$	27		$	50		$	—		$	50
Foreign underwriting losses	80			—			80			120			—			120
Capital loss carryforwards	32			—			32			83			—			83
Insurance claims and reserves	665			29			694			774			27			801
Employee benefits	84			—			84			131			—			131
Other, net	48			(3		)	45			85			(5		)	80
Total deferred tax assets before valuation allowance	936			26			962			1,243			22			1,265
Valuation allowance against deferred tax assets	(109		)	—			(109		)	(173		)	—			(173		)
Total deferred tax assets	827			26			853			1,070			22			1,092
Deferred tax liabilities:
Investment securities	(1		)	(340		)	(341		)	29			(336		)	(307		)
Deferred policy acquisition costs	(293		)	91			(202		)	(448		)	96			(352		)
Insurance claims and reserves transition liability	(128		)	—			(128		)	—			—			—
Real estate, property and equipment	(35		)	—			(35		)	(45		)	—			(45		)
Total deferred tax liabilities	(457		)	(249		)	(706		)	(464		)	(240		)	(704		)
Net deferred tax asset (liability)	$	370		$	(223	)	$	147		$	606		$	(218	)	$	388

Progression of the liability for uncertain tax positions, excluding interest and penalties

A progression of the liability for uncertain tax positions, excluding interest and penalties, follows (in millions):

	2017			2016		2015
Balance at January 1	$	1		$	1	$	—
Additions for tax positions of prior years	—			—		1
Reductions for tax positions of prior years	—			—		—
Additions for tax positions of current year	—			—		—
Settlements	(1		)	—		—
Balance at December 31	$	—		$	1	$	1

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Quarterly Operating Results (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2017

Quarterly Financial Information Disclosure [Abstract]

Schedule of quarterly operating results

The following are quarterly results of consolidated operations for the two years ended December 31, 2017 (in millions, except per share amounts). Quarterly earnings per share do not add to year-to-date amounts due to changes in shares outstanding.

	1st Quarter		2nd Quarter		3rd Quarter		4th Quarter		Total Year
2017
Revenues	$	1,576	$	1,646	$	1,835	$	1,808	$	6,865
Net earnings, including noncontrolling interests	155		145		11		166		477
Net earnings attributable to shareholders	153		145		11		166		475
Earnings attributable to shareholders per Common Share:
Basic	$	1.76	$	1.64	$	0.13	$	1.88	$	5.40
Diluted	1.72		1.61		0.13		1.84		5.28
Average number of Common Shares:
Basic	87.2		87.8		88.1		88.2		87.8
Diluted	89.3		89.8		90.0		90.1		89.8
2016
Revenues	$	1,475	$	1,581	$	1,705	$	1,737	$	6,498
Net earnings, including noncontrolling interests	104		63		113		388		668
Net earnings attributable to shareholders	101		54		109		385		649
Earnings attributable to shareholders per Common Share:
Basic	$	1.16	$	0.63	$	1.25	$	4.43	$	7.47
Diluted	1.14		0.62		1.23		4.33		7.33
Average number of Common Shares:
Basic	86.9		86.8		86.9		86.9		86.9
Diluted	88.5		88.4		88.5		88.8		88.5

Quarterly information on realized gains (losses) and favorable (unfavorable) development on unpaid loss and loss adjustment expenses

Pretax realized gains on subsidiaries and securities (including other-than-temporary impairments), favorable (adverse) prior year development of AFG’s liability for losses and loss adjustment expenses (“LAE”) and the impact of derivatives related to FIAs were as follows (in millions):

	1st Quarter			2nd Quarter			3rd Quarter			4th Quarter			Total Year
Realized Gains (Losses) on Securities and Subsidiaries
2017	$	3		$	8		$	(12	)	$	6		$	5
2016	(18		)	(14		)	2			51			21
Prior Year Development Favorable (Adverse)
2017	$	28		$	22		$	(52	)	$	66		$	64
2016	28			(28		)	(22		)	(10		)	(32		)
Impact of Derivatives related to Fixed-indexed Annuities
2017	$	(2	)	$	(16	)	$	(4	)	$	(11	)	$	(33	)
2016	(31		)	(26		)	1			29			(27		)

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Insurance (Tables)

12 Months Ended

Dec. 31, 2017

Insurance [Abstract]

Reconciliation of beginning and ending liability for unpaid losses and loss adjustment expenses

The following table provides an analysis of changes in the liability for losses and loss adjustment expenses over the past three years (in millions):

	2017			2016			2015
Balance at beginning of period	$	8,563		$	8,127		$	7,872
Less reinsurance recoverables, net of allowance	2,302			2,201			2,227
Net liability at beginning of period	6,261			5,926			5,645
Provision for losses and LAE occurring in the current year	3,019			2,730			2,662
Net increase (decrease) in the provision for claims of prior years:
Special A&E charges	89			36			67
Neon exited lines charge	(18		)	57			—
Other	(135		)	(61		)	(34		)
Total losses and LAE incurred	2,955			2,762			2,695
Payments for losses and LAE of:
Current year	(942		)	(841		)	(828		)
Prior years	(1,586		)	(1,512		)	(1,575		)
Total payments	(2,528		)	(2,353		)	(2,403		)
Reserves of businesses disposed (*)	—			(40		)	—
Foreign currency translation and other	33			(34		)	(11		)
Net liability at end of period	6,721			6,261			5,926
Add back reinsurance recoverables, net of allowance	2,957			2,302			2,201
Gross unpaid losses and LAE included in the balance sheet	$	9,678		$	8,563		$	8,127

(*) Reflects the 2016 reinsurance to close transactions at Neon (discussed below).

Short-duration insurance contracts, reconciliation of claims development to liability

A reconciliation of incurred and paid claims development information to the aggregate carrying amount of the liability for unpaid losses and LAE, with separate disclosure of reinsurance recoverables on unpaid claims is shown below (in millions):

	2017
Unpaid losses and allocated LAE, net of reinsurance:
Specialty
Property and transportation	$	1,069
Specialty casualty	3,630
Specialty financial	221
Other specialty	278
Total Specialty (excluding foreign reserves)	5,198
Other reserves
Reserves for foreign operations:
Neon Lloyd’s business	480
Other subsidiaries	269
A&E reserves	403
Unallocated LAE	326
Other	45
Total other reserves	1,523
Total reserves, net of reinsurance	6,721
Add back reinsurance recoverables, net of allowance	2,957
Gross unpaid losses and LAE included in the balance sheet	$	9,678

Short-duration insurance contracts, claims development

The following claims development tables and associated disclosures related to short-duration insurance contracts are prepared by sub-segment within the property and casualty insurance business for the most recent 10 accident years. AFG determines its claim counts at the claimant or policy feature level depending on the particular facts and circumstances of the underlying claim. While the methodology is generally consistent within each sub-segment, there are minor differences between and within the sub-segments. The methods used to summarize claim counts have not changed significantly over the time periods reported in the tables below.

Property and transportation
(Dollars in Millions)
	Incurred Claims and Allocated LAE, Net of Reinsurance																				As of December 31, 2017
	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)																				Total IBNR Plus Expected Development on Reported Claims		Cumulative Number of Reported Claims
Accident Year	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017
2008	$	923	$	871	$	852	$	853	$	856	$	854	$	855	$	856	$	854	$	854	$	1	157,164
2009			526		506		523		516		511		511		508		508		508		3		140,532
2010					702		662		668		676		679		679		683		680		6		140,634
2011							830		816		831		845		856		868		865		10		140,418
2012									890		884		897		909		922		918		19		146,630
2013											911		898		902		908		910		22		142,249
2014													868		852		841		843		38		136,882
2015															842		804		798		54		135,029
2016																	771		740		110		122,112
2017																			913		273		128,455
																	Total		$	8,029

	Cumulative Paid Claims and Allocated LAE, Net of Reinsurance
Accident Year	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)
	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017		% (a)
2008	$	352	$	706	$	761	$	799	$	824	$	835	$	846	$	846	$	847	$	848	99.3	%
2009			229		348		413		456		479		493		497		499		502		98.8	%
2010					328		505		556		618		649		660		665		669		98.4	%
2011							373		679		742		787		821		840		847		97.9	%
2012									582		725		793		841		868		883		96.2	%
2013											449		721		784		831		862		94.7	%
2014													337		646		711		765		90.7	%
2015															367		595		683		85.6	%
2016																	299		534		72.2	%
2017																			387		42.4	%
																	Total		$	6,980
									Unpaid losses and LAE — years 2008 through 2017										1,049
			Unpaid losses and LAE — 11th year and prior (excluding unallocated LAE)																20
			Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)																$	1,069

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance (Supplementary Information and Unaudited)
	Year 1		Year 2		Year 3		Year 4		Year 5		Year 6		Year 7		Year 8		Year 9		Year 10
Annual	45.9	%	29.9	%	8.4	%	6.3	%	3.7	%	1.9	%	0.9	%	0.3	%	0.4	%	0.1	%
Cumulative	45.9	%	75.8	%	84.2	%	90.5	%	94.2	%	96.1	%	97.0	%	97.3	%	97.7	%	97.8	%

(a) Represents the cumulative percentage paid of incurred claims and allocated LAE (net of reinsurance, as estimated at December 31, 2017).

Specialty casualty
(Dollars in Millions)
	Incurred Claims and Allocated LAE, Net of Reinsurance																				As of December 31, 2017
	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)																				Total IBNR Plus Expected Development on Reported Claims		Cumulative Number of Reported Claims
Accident Year	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017
2008	$	905	$	891	$	874	$	860	$	871	$	856	$	855	$	849	$	855	$	854	$	41	59,991
2009			864		867		845		826		816		811		812		807		803		48		53,192
2010					847		863		864		842		856		846		845		842		65		52,855
2011							831		831		819		828		814		808		806		73		50,851
2012									874		865		859		859		855		849		104		49,836
2013											938		921		915		910		913		132		49,412
2014													1,011		984		984		982		202		52,167
2015															1,057		1,023		1,022		268		52,846
2016																	1,105		1,098		426		50,652
2017																			1,186		715		46,399
																	Total		$	9,355

	Cumulative Paid Claims and Allocated LAE, Net of Reinsurance
Accident Year	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)
	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017		% (a)
2008	$	162	$	355	$	490	$	588	$	653	$	702	$	727	$	751	$	768	$	782	91.6	%
2009			160		366		494		575		636		673		698		713		722		89.9	%
2010					179		393		539		623		676		712		734		748		88.8	%
2011							165		369		506		595		643		674		694		86.1	%
2012									163		368		495		596		658		696		82.0	%
2013											171		377		530		638		698		76.5	%
2014													182		398		556		659		67.1	%
2015															170		398		560		54.8	%
2016																	181		404		36.8	%
2017																			192		16.2	%
																	Total		$	6,155
									Unpaid losses and LAE — years 2008 through 2017										3,200
			Unpaid losses and LAE — 11th year and prior (excluding unallocated LAE)																430
			Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)																$	3,630

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance (Supplementary Information and Unaudited)
	Year 1		Year 2		Year 3		Year 4		Year 5		Year 6		Year 7		Year 8		Year 9		Year 10
Annual	18.6	%	23.4	%	16.2	%	11.0	%	6.9	%	4.6	%	2.8	%	2.1	%	1.6	%	1.6	%
Cumulative	18.6	%	42.0	%	58.2	%	69.2	%	76.1	%	80.7	%	83.5	%	85.6	%	87.2	%	88.8	%

(a) Represents the cumulative percentage paid of incurred claims and allocated LAE (net of reinsurance, as estimated at December 31, 2017).

Specialty financial
(Dollars in Millions)
	Incurred Claims and Allocated LAE, Net of Reinsurance																				As of December 31, 2017
	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)																				Total IBNR Plus Expected Development on Reported Claims		Cumulative Number of Reported Claims
Accident Year	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017
2008	$	190	$	207	$	212	$	209	$	203	$	199	$	198	$	197	$	198	$	199	$	1	27,292
2009			193		193		187		184		188		186		187		186		185		—		27,441
2010					139		146		133		133		135		133		130		128		2		21,929
2011							140		158		157		155		148		146		144		11		16,374
2012									164		163		151		139		137		135		11		21,050
2013											141		145		137		131		127		9		28,279
2014													146		157		156		154		16		28,983
2015															156		159		157		21		37,125
2016																	179		183		26		43,484
2017																			212		84		36,116
																	Total		$	1,624

	Cumulative Paid Claims and Allocated LAE, Net of Reinsurance
Accident Year	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)
	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017		% (a)
2008	$	103	$	153	$	185	$	189	$	189	$	191	$	193	$	194	$	194	$	197	99.0	%
2009			112		145		157		166		171		182		185		186		186		100.5	%
2010					61		93		104		122		133		131		128		127		99.2	%
2011							59		113		116		124		131		132		133		92.4	%
2012									71		104		109		117		121		126		93.3	%
2013											70		100		107		114		117		92.1	%
2014													62		108		125		128		83.1	%
2015															72		109		129		82.2	%
2016																	87		141		77.0	%
2017																			119		56.1	%
																	Total		$	1,403
									Unpaid losses and LAE — years 2008 through 2017										221
			Unpaid losses and LAE — 11th year and prior (excluding unallocated LAE)																—
			Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)																$	221

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance (Supplementary Information and Unaudited)
	Year 1		Year 2		Year 3		Year 4		Year 5		Year 6		Year 7		Year 8		Year 9		Year 10
Annual	49.8	%	26.3	%	8.3	%	5.7	%	3.6	%	2.0	%	0.2	%	0.1	%	—	%	1.5	%
Cumulative	49.8	%	76.1	%	84.4	%	90.1	%	93.7	%	95.7	%	95.9	%	96.0	%	96.0	%	97.5	%

(a) Represents the cumulative percentage paid of incurred claims and allocated LAE (net of reinsurance, as estimated at December 31, 2017).

Other specialty
(Dollars in Millions)
	Incurred Claims and Allocated LAE, Net of Reinsurance																				As of December 31, 2017
	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)																				Total IBNR Plus Expected Development on Reported Claims		Cumulative Number of Reported Claims (a)
Accident Year	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017
2008	$	49	$	49	$	49	$	49	$	48	$	46	$	45	$	45	$	44	$	43	$	3	—
2009			41		41		41		40		37		37		36		38		33		7		—
2010					36		39		40		39		40		40		40		40		2		—
2011							39		43		42		43		43		44		44		4		—
2012									42		40		39		40		41		39		8		—
2013											46		47		46		47		50		5		—
2014													58		57		59		59		16		—
2015															59		60		63		20		—
2016																	61		61		31		—
2017																			63		47		—
																	Total		$	495

	Cumulative Paid Claims and Allocated LAE, Net of Reinsurance
Accident Year	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)
	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017		% (b)
2008	$	10	$	16	$	23	$	31	$	35	$	37	$	37	$	37	$	38	$	39	90.7	%
2009			8		12		15		19		22		22		24		26		25		75.8	%
2010					8		14		21		24		27		33		35		36		90.0	%
2011							12		20		25		28		34		36		37		84.1	%
2012									8		17		21		25		28		30		76.9	%
2013											7		16		22		34		37		74.0	%
2014													13		21		30		36		61.0	%
2015															10		26		31		49.2	%
2016																	9		19		31.1	%
2017																			10		15.9	%
																	Total		$	300
									Unpaid losses and LAE — years 2008 through 2017										195
			Unpaid losses and LAE — 11th year and prior (excluding unallocated LAE)																83
			Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)																$	278

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance (Supplementary Information and Unaudited)
	Year 1		Year 2		Year 3		Year 4		Year 5		Year 6		Year 7		Year 8		Year 9		Year 10
Annual	19.8	%	17.3	%	12.5	%	12.8	%	8.9	%	5.9	%	3.3	%	2.9	%	(0.4	%)	2.3	%
Cumulative	19.8	%	37.1	%	49.6	%	62.4	%	71.3	%	77.2	%	80.5	%	83.4	%	83.0	%	85.3	%

(a) The amounts shown in Other specialty represent business assumed by AFG’s internal reinsurance program from the operations that make up AFG’s other Specialty property and casualty insurance sub-segments. Accordingly, the liability for incurred claims and allocated LAE represents additional reserves held on claims counted in the tables provided for the other sub-segments (above).

(b) Represents the cumulative percentage paid of incurred claims and allocated LAE (net of reinsurance, as estimated at December 31, 2017).

Total Specialty Group
(Dollars in Millions)
	Incurred Claims and Allocated LAE, Net of Reinsurance																				As of December 31, 2017
	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)																				Total IBNR Plus Expected Development on Reported Claims		Cumulative Number of Reported Claims
Accident Year	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017
2008	$	2,067	$	2,018	$	1,987	$	1,971	$	1,978	$	1,955	$	1,953	$	1,947	$	1,951	$	1,950	$	46	244,447
2009			1,624		1,607		1,596		1,566		1,552		1,545		1,543		1,539		1,529		58		221,165
2010					1,724		1,710		1,705		1,690		1,710		1,698		1,698		1,690		75		215,418
2011							1,840		1,848		1,849		1,871		1,861		1,866		1,859		98		207,643
2012									1,970		1,952		1,946		1,947		1,955		1,941		142		217,516
2013											2,036		2,011		2,000		1,996		2,000		168		219,940
2014													2,083		2,050		2,040		2,038		272		218,032
2015															2,114		2,046		2,040		363		225,000
2016																	2,116		2,082		593		216,248
2017																			2,374		1,119		210,970
																	Total		$	19,503

	Cumulative Paid Claims and Allocated LAE, Net of Reinsurance
Accident Year	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)
	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017		% (a)
2008	$	627	$	1,230	$	1,459	$	1,607	$	1,701	$	1,765	$	1,803	$	1,828	$	1,847	$	1,866	95.7	%
2009			509		871		1,079		1,216		1,308		1,370		1,404		1,424		1,435		93.9	%
2010					576		1,005		1,220		1,387		1,485		1,536		1,562		1,580		93.5	%
2011							609		1,181		1,389		1,534		1,629		1,682		1,711		92.0	%
2012									824		1,214		1,418		1,579		1,675		1,735		89.4	%
2013											697		1,214		1,443		1,617		1,714		85.7	%
2014													594		1,173		1,422		1,588		77.9	%
2015															619		1,128		1,403		68.8	%
2016																	576		1,098		52.7	%
2017																			708		29.8	%
																	Total		$	14,838
									Unpaid losses and LAE — years 2008 through 2017										4,665
			Unpaid losses and LAE — 11th year and prior (excluding unallocated LAE)																533
			Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)																$	5,198

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance (Supplementary Information and Unaudited)
	Year 1		Year 2		Year 3		Year 4		Year 5		Year 6		Year 7		Year 8		Year 9		Year 10
Annual	32.7	%	26.1	%	12.1	%	8.5	%	5.3	%	3.3	%	1.8	%	1.2	%	0.8	%	1.0	%
Cumulative	32.7	%	58.8	%	70.9	%	79.4	%	84.7	%	88.0	%	89.8	%	91.0	%	91.8	%	92.8	%

(a) Represents the cumulative percentage paid of incurred claims and allocated LAE (net of reinsurance, as estimated at December 31, 2017).

Short-duration insurance contracts, schedule of historical claims duration

The following claims development tables and associated disclosures related to short-duration insurance contracts are prepared by sub-segment within the property and casualty insurance business for the most recent 10 accident years. AFG determines its claim counts at the claimant or policy feature level depending on the particular facts and circumstances of the underlying claim. While the methodology is generally consistent within each sub-segment, there are minor differences between and within the sub-segments. The methods used to summarize claim counts have not changed significantly over the time periods reported in the tables below.

Property and transportation
(Dollars in Millions)
	Incurred Claims and Allocated LAE, Net of Reinsurance																				As of December 31, 2017
	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)																				Total IBNR Plus Expected Development on Reported Claims		Cumulative Number of Reported Claims
Accident Year	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017
2008	$	923	$	871	$	852	$	853	$	856	$	854	$	855	$	856	$	854	$	854	$	1	157,164
2009			526		506		523		516		511		511		508		508		508		3		140,532
2010					702		662		668		676		679		679		683		680		6		140,634
2011							830		816		831		845		856		868		865		10		140,418
2012									890		884		897		909		922		918		19		146,630
2013											911		898		902		908		910		22		142,249
2014													868		852		841		843		38		136,882
2015															842		804		798		54		135,029
2016																	771		740		110		122,112
2017																			913		273		128,455
																	Total		$	8,029

	Cumulative Paid Claims and Allocated LAE, Net of Reinsurance
Accident Year	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)
	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017		% (a)
2008	$	352	$	706	$	761	$	799	$	824	$	835	$	846	$	846	$	847	$	848	99.3	%
2009			229		348		413		456		479		493		497		499		502		98.8	%
2010					328		505		556		618		649		660		665		669		98.4	%
2011							373		679		742		787		821		840		847		97.9	%
2012									582		725		793		841		868		883		96.2	%
2013											449		721		784		831		862		94.7	%
2014													337		646		711		765		90.7	%
2015															367		595		683		85.6	%
2016																	299		534		72.2	%
2017																			387		42.4	%
																	Total		$	6,980
									Unpaid losses and LAE — years 2008 through 2017										1,049
			Unpaid losses and LAE — 11th year and prior (excluding unallocated LAE)																20
			Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)																$	1,069

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance (Supplementary Information and Unaudited)
	Year 1		Year 2		Year 3		Year 4		Year 5		Year 6		Year 7		Year 8		Year 9		Year 10
Annual	45.9	%	29.9	%	8.4	%	6.3	%	3.7	%	1.9	%	0.9	%	0.3	%	0.4	%	0.1	%
Cumulative	45.9	%	75.8	%	84.2	%	90.5	%	94.2	%	96.1	%	97.0	%	97.3	%	97.7	%	97.8	%

(a) Represents the cumulative percentage paid of incurred claims and allocated LAE (net of reinsurance, as estimated at December 31, 2017).

Specialty casualty
(Dollars in Millions)
	Incurred Claims and Allocated LAE, Net of Reinsurance																				As of December 31, 2017
	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)																				Total IBNR Plus Expected Development on Reported Claims		Cumulative Number of Reported Claims
Accident Year	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017
2008	$	905	$	891	$	874	$	860	$	871	$	856	$	855	$	849	$	855	$	854	$	41	59,991
2009			864		867		845		826		816		811		812		807		803		48		53,192
2010					847		863		864		842		856		846		845		842		65		52,855
2011							831		831		819		828		814		808		806		73		50,851
2012									874		865		859		859		855		849		104		49,836
2013											938		921		915		910		913		132		49,412
2014													1,011		984		984		982		202		52,167
2015															1,057		1,023		1,022		268		52,846
2016																	1,105		1,098		426		50,652
2017																			1,186		715		46,399
																	Total		$	9,355

	Cumulative Paid Claims and Allocated LAE, Net of Reinsurance
Accident Year	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)
	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017		% (a)
2008	$	162	$	355	$	490	$	588	$	653	$	702	$	727	$	751	$	768	$	782	91.6	%
2009			160		366		494		575		636		673		698		713		722		89.9	%
2010					179		393		539		623		676		712		734		748		88.8	%
2011							165		369		506		595		643		674		694		86.1	%
2012									163		368		495		596		658		696		82.0	%
2013											171		377		530		638		698		76.5	%
2014													182		398		556		659		67.1	%
2015															170		398		560		54.8	%
2016																	181		404		36.8	%
2017																			192		16.2	%
																	Total		$	6,155
									Unpaid losses and LAE — years 2008 through 2017										3,200
			Unpaid losses and LAE — 11th year and prior (excluding unallocated LAE)																430
			Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)																$	3,630

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance (Supplementary Information and Unaudited)
	Year 1		Year 2		Year 3		Year 4		Year 5		Year 6		Year 7		Year 8		Year 9		Year 10
Annual	18.6	%	23.4	%	16.2	%	11.0	%	6.9	%	4.6	%	2.8	%	2.1	%	1.6	%	1.6	%
Cumulative	18.6	%	42.0	%	58.2	%	69.2	%	76.1	%	80.7	%	83.5	%	85.6	%	87.2	%	88.8	%

(a) Represents the cumulative percentage paid of incurred claims and allocated LAE (net of reinsurance, as estimated at December 31, 2017).

Specialty financial
(Dollars in Millions)
	Incurred Claims and Allocated LAE, Net of Reinsurance																				As of December 31, 2017
	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)																				Total IBNR Plus Expected Development on Reported Claims		Cumulative Number of Reported Claims
Accident Year	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017
2008	$	190	$	207	$	212	$	209	$	203	$	199	$	198	$	197	$	198	$	199	$	1	27,292
2009			193		193		187		184		188		186		187		186		185		—		27,441
2010					139		146		133		133		135		133		130		128		2		21,929
2011							140		158		157		155		148		146		144		11		16,374
2012									164		163		151		139		137		135		11		21,050
2013											141		145		137		131		127		9		28,279
2014													146		157		156		154		16		28,983
2015															156		159		157		21		37,125
2016																	179		183		26		43,484
2017																			212		84		36,116
																	Total		$	1,624

	Cumulative Paid Claims and Allocated LAE, Net of Reinsurance
Accident Year	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)
	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017		% (a)
2008	$	103	$	153	$	185	$	189	$	189	$	191	$	193	$	194	$	194	$	197	99.0	%
2009			112		145		157		166		171		182		185		186		186		100.5	%
2010					61		93		104		122		133		131		128		127		99.2	%
2011							59		113		116		124		131		132		133		92.4	%
2012									71		104		109		117		121		126		93.3	%
2013											70		100		107		114		117		92.1	%
2014													62		108		125		128		83.1	%
2015															72		109		129		82.2	%
2016																	87		141		77.0	%
2017																			119		56.1	%
																	Total		$	1,403
									Unpaid losses and LAE — years 2008 through 2017										221
			Unpaid losses and LAE — 11th year and prior (excluding unallocated LAE)																—
			Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)																$	221

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance (Supplementary Information and Unaudited)
	Year 1		Year 2		Year 3		Year 4		Year 5		Year 6		Year 7		Year 8		Year 9		Year 10
Annual	49.8	%	26.3	%	8.3	%	5.7	%	3.6	%	2.0	%	0.2	%	0.1	%	—	%	1.5	%
Cumulative	49.8	%	76.1	%	84.4	%	90.1	%	93.7	%	95.7	%	95.9	%	96.0	%	96.0	%	97.5	%

(a) Represents the cumulative percentage paid of incurred claims and allocated LAE (net of reinsurance, as estimated at December 31, 2017).

Other specialty
(Dollars in Millions)
	Incurred Claims and Allocated LAE, Net of Reinsurance																				As of December 31, 2017
	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)																				Total IBNR Plus Expected Development on Reported Claims		Cumulative Number of Reported Claims (a)
Accident Year	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017
2008	$	49	$	49	$	49	$	49	$	48	$	46	$	45	$	45	$	44	$	43	$	3	—
2009			41		41		41		40		37		37		36		38		33		7		—
2010					36		39		40		39		40		40		40		40		2		—
2011							39		43		42		43		43		44		44		4		—
2012									42		40		39		40		41		39		8		—
2013											46		47		46		47		50		5		—
2014													58		57		59		59		16		—
2015															59		60		63		20		—
2016																	61		61		31		—
2017																			63		47		—
																	Total		$	495

	Cumulative Paid Claims and Allocated LAE, Net of Reinsurance
Accident Year	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)
	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017		% (b)
2008	$	10	$	16	$	23	$	31	$	35	$	37	$	37	$	37	$	38	$	39	90.7	%
2009			8		12		15		19		22		22		24		26		25		75.8	%
2010					8		14		21		24		27		33		35		36		90.0	%
2011							12		20		25		28		34		36		37		84.1	%
2012									8		17		21		25		28		30		76.9	%
2013											7		16		22		34		37		74.0	%
2014													13		21		30		36		61.0	%
2015															10		26		31		49.2	%
2016																	9		19		31.1	%
2017																			10		15.9	%
																	Total		$	300
									Unpaid losses and LAE — years 2008 through 2017										195
			Unpaid losses and LAE — 11th year and prior (excluding unallocated LAE)																83
			Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)																$	278

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance (Supplementary Information and Unaudited)
	Year 1		Year 2		Year 3		Year 4		Year 5		Year 6		Year 7		Year 8		Year 9		Year 10
Annual	19.8	%	17.3	%	12.5	%	12.8	%	8.9	%	5.9	%	3.3	%	2.9	%	(0.4	%)	2.3	%
Cumulative	19.8	%	37.1	%	49.6	%	62.4	%	71.3	%	77.2	%	80.5	%	83.4	%	83.0	%	85.3	%

(a) The amounts shown in Other specialty represent business assumed by AFG’s internal reinsurance program from the operations that make up AFG’s other Specialty property and casualty insurance sub-segments. Accordingly, the liability for incurred claims and allocated LAE represents additional reserves held on claims counted in the tables provided for the other sub-segments (above).

(b) Represents the cumulative percentage paid of incurred claims and allocated LAE (net of reinsurance, as estimated at December 31, 2017).

Total Specialty Group
(Dollars in Millions)
	Incurred Claims and Allocated LAE, Net of Reinsurance																				As of December 31, 2017
	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)																				Total IBNR Plus Expected Development on Reported Claims		Cumulative Number of Reported Claims
Accident Year	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017
2008	$	2,067	$	2,018	$	1,987	$	1,971	$	1,978	$	1,955	$	1,953	$	1,947	$	1,951	$	1,950	$	46	244,447
2009			1,624		1,607		1,596		1,566		1,552		1,545		1,543		1,539		1,529		58		221,165
2010					1,724		1,710		1,705		1,690		1,710		1,698		1,698		1,690		75		215,418
2011							1,840		1,848		1,849		1,871		1,861		1,866		1,859		98		207,643
2012									1,970		1,952		1,946		1,947		1,955		1,941		142		217,516
2013											2,036		2,011		2,000		1,996		2,000		168		219,940
2014													2,083		2,050		2,040		2,038		272		218,032
2015															2,114		2,046		2,040		363		225,000
2016																	2,116		2,082		593		216,248
2017																			2,374		1,119		210,970
																	Total		$	19,503

	Cumulative Paid Claims and Allocated LAE, Net of Reinsurance
Accident Year	For the Years Ended (2008–2016 is Supplementary Information and Unaudited)
	2008		2009		2010		2011		2012		2013		2014		2015		2016		2017		% (a)
2008	$	627	$	1,230	$	1,459	$	1,607	$	1,701	$	1,765	$	1,803	$	1,828	$	1,847	$	1,866	95.7	%
2009			509		871		1,079		1,216		1,308		1,370		1,404		1,424		1,435		93.9	%
2010					576		1,005		1,220		1,387		1,485		1,536		1,562		1,580		93.5	%
2011							609		1,181		1,389		1,534		1,629		1,682		1,711		92.0	%
2012									824		1,214		1,418		1,579		1,675		1,735		89.4	%
2013											697		1,214		1,443		1,617		1,714		85.7	%
2014													594		1,173		1,422		1,588		77.9	%
2015															619		1,128		1,403		68.8	%
2016																	576		1,098		52.7	%
2017																			708		29.8	%
																	Total		$	14,838
									Unpaid losses and LAE — years 2008 through 2017										4,665
			Unpaid losses and LAE — 11th year and prior (excluding unallocated LAE)																533
			Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)																$	5,198

	Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance (Supplementary Information and Unaudited)
	Year 1		Year 2		Year 3		Year 4		Year 5		Year 6		Year 7		Year 8		Year 9		Year 10
Annual	32.7	%	26.1	%	12.1	%	8.5	%	5.3	%	3.3	%	1.8	%	1.2	%	0.8	%	1.0	%
Cumulative	32.7	%	58.8	%	70.9	%	79.4	%	84.7	%	88.0	%	89.8	%	91.0	%	91.8	%	92.8	%

(a) Represents the cumulative percentage paid of incurred claims and allocated LAE (net of reinsurance, as estimated at December 31, 2017).

Statutory information

Net earnings and capital and surplus on a statutory basis for the insurance subsidiaries were as follows (in millions):

	Net Earnings						Capital and Surplus
	2017		2016		2015		2017		2016
Property and casualty companies	$	484	$	461	$	408	$	2,729	$	2,939
Life insurance companies	286		167		399		2,132		1,976

Reinsurance information

The following table shows (in millions) (i) amounts deducted from property and casualty written and earned premiums in connection with reinsurance ceded, (ii) written and earned premiums included in income for reinsurance assumed and (iii) reinsurance recoveries, which represent ceded losses and loss adjustment expenses.

	2017			2016			2015
Direct premiums written	$	6,310		$	5,858		$	5,713
Reinsurance assumed	192			123			119
Reinsurance ceded	(1,751		)	(1,595		)	(1,505		)
Net written premiums	$	4,751		$	4,386		$	4,327
Direct premiums earned	$	6,112		$	5,745		$	5,613
Reinsurance assumed	157			118			105
Reinsurance ceded	(1,690		)	(1,535		)	(1,494		)
Net earned premiums	$	4,579		$	4,328		$	4,224
Reinsurance recoveries	$	1,379		$	810		$	936

Schedule of reserve liabilities for annuity benefits accumulated

For certain products, the liability for “annuity benefits accumulated” includes reserves for excess benefits expected to be paid on future deaths and annuitizations (“EDAR”), guaranteed withdrawal benefits and accrued persistency and premium bonuses. The liabilities included in AFG’s Balance Sheet for these benefits, excluding the impact of unrealized gains on securities, were as follows at December 31 (in millions):

	2017		2016
Expected death and annuitization	$	228	$	223
Guaranteed withdrawal benefits	357		278
Accrued persistency and premium bonuses	3		6

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Accounting Policies - Narrative (Details) - USD ($) shares in Millions, $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Jan. 01, 2016	Dec. 31, 2014
Significant Accounting Policies [Line Items]
Net unrealized gain on equity securities included in AOCI		$ 840	$ 404
Impact of the U.S. corporate tax rate change on AOCI		0				$ 2
Tax benefit related to exercise of stock options		$ 18	$ 11	$ 16
Weighted average common shares adjustment related to stock-based compensation		2.0	1.6	1.8
Anti-dilutive potential common shares related to stock-based compensation plans		0.0	0.4	1.1
Maturities of short term investments		3 months
Accounting Standards Update 2014-09
Significant Accounting Policies [Line Items]
Expected effect on consolidated revenues under new revenue recognition guidance effective in 2018		2.00%
Retained Earnings
Significant Accounting Policies [Line Items]
Impact of the U.S. corporate tax rate change on AOCI		$ (145)				$ 2
Retained Earnings | Maximum
Significant Accounting Policies [Line Items]
Impact of the U.S. corporate tax rate change on AOCI					$ 1
Stock Options | Capital surplus under previous accounting guidance
Significant Accounting Policies [Line Items]
Tax benefit related to exercise of stock options		17	$ 9
Equity securities
Significant Accounting Policies [Line Items]
Net unrealized gain on equity securities included in AOCI	[1]	221	$ 98
Equity securities | Accounting Standards Update 2016-01
Significant Accounting Policies [Line Items]
Net unrealized gain on equity securities included in AOCI		221
Tax Cuts and Jobs Act of 2017 | Accounting Standards Update 2018-02
Significant Accounting Policies [Line Items]
Impact of the U.S. corporate tax rate change on AOCI		$ 145

[1] As discussed in Note A — “Accounting Policies — Investments,” effective January 1, 2018, all equity securities currently classified as “available for sale” will be required to be carried at fair value through net earnings instead of AOCI.

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Acquisitions and Sale of Businesses - Narrative on acquisitions of subsidiaries (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended		12 Months Ended
	Nov. 10, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Business Acquisitions [Line Items]
Payments to acquire additional interest in subsidiaries				$ 0	$ 315	$ 0
Income tax expense (benefit)				247	119	195
National Interstate
Business Acquisitions [Line Items]
Percentage ownership of National Interstate by noncontrolling owners prior to acquisition	49.00%
Payments to acquire additional interest in subsidiaries	$ 315
Acquisition price per share (USD per share)	$ 32.00
Cash dividend paid (USD per share)	$ 0.50
Payment of special cash dividends	$ 5
Payments for acquisition related costs			$ 10
AFG
Business Acquisitions [Line Items]
Income tax expense (benefit)		$ (56)	(177)	$ 247	$ 119	$ 195
AFG | National Interstate
Business Acquisitions [Line Items]
Reduction to capital surplus	$ (137)
Income tax expense (benefit)			$ (66)

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Acquisitions and Sale of Businesses - Narrative on sale of businesses (Details) $ in Millions				3 Months Ended					12 Months Ended
		Dec. 24, 2015 USD ($)	Mar. 31, 2015	Dec. 31, 2017 USD ($) policy	Dec. 31, 2016 USD ($)	Jun. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2017 USD ($) policy	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Nov. 30, 2015
Sale of Businesses
Sale of redeemable noncontrolling interests									$ (3)
Income tax expense (benefit)									247	$ 119	$ 195
Long-term care insurance reserves				$ 39	$ 37				39	37
Realized gains (losses) on subsidiaries									0	2	(161)
Property and Casualty Group
Sale of Businesses
Realized gains (losses) on subsidiaries							$ 5
Neon Capital Limited
Sale of Businesses
Sale of redeemable noncontrolling interests				(3)
Income tax expense (benefit)				(56)	(111)					(48)
AFG
Sale of Businesses
Income tax expense (benefit)				$ (56)	$ (177)				247	119	$ 195
Run-off long-term care insurance business
Sale of Businesses
Net sale proceeds	[1]	$ 13
Potential additional sale proceeds based on the release of certain statutory liabilities of the legal entities sold									$ 13
Contingent capital support agreement amount		$ 35
Contingent capital support agreement term		5 years
Long-term care insurance reserves of business sold as a percentage of total long-term care insurance reserves												96.00%
Total tax benefits proceeds from the sale of business										$ 97
Realized gains (losses) on subsidiaries		$ (166)				$ 2		$ (162)
Loss on subsidiaries, net of tax		$ (108)						$ (105)
Carrying value of the assets and liabilities of business sold as a percentage of total assets and liabilities		4.00%	4.00%
Run-off long-term care insurance business | AFG
Sale of Businesses
Number of long-term care insurance policies | policy				1,600					1,600
Long-term care insurance reserves				$ 39					$ 39

[1] Includes the fair value of the potential additional consideration and capital maintenance agreement and is shown net of estimated expenses.

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Acquisitions and Sale of Businesses - Impact of the sale of subsidiaries sold (Details) - USD ($) $ in Millions			3 Months Ended		12 Months Ended
		Dec. 24, 2015	Jun. 30, 2016	Mar. 31, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Liabilities of businesses sold:
Realized gains (losses) on subsidiaries					$ 0	$ 2	$ (161)
Run-off long-term care insurance business
Sale of Businesses
Net sale proceeds	[1]	$ 13
Assets of businesses sold:
Cash and investments		1,334
Recoverables from reinsurers		630
Deferred policy acquisition costs		16
Other receivables		16
Other assets		(4)
Goodwill		2
Total assets		1,994
Liabilities of businesses sold:
Annuity benefits accumulated		261
Life, accident and health reserves		1,525
Other liabilities		7
Total liabilities		1,793
Reclassify net unrealized gain on marketable securities		22
Net assets of businesses sold		179
Realized gains (losses) on subsidiaries		(166)	$ 2	$ (162)
Tax benefit		58
Loss on subsidiaries, net of tax		$ (108)		$ (105)

[1] Includes the fair value of the potential additional consideration and capital maintenance agreement and is shown net of estimated expenses.

XML

Acquisitions and Sale of Businesses - Revenues, costs and expenses, and earnings before income taxes for the subsidiaries sold (Details) - Run-off long-term care insurance business $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($)
Life, accident and health net earned premiums:
Long-term care	$ 73
Life operations	11
Net investment income	73
Realized gains (losses) on securities and other income	(11)
Total revenues	146
Annuity benefits	8
Life, accident and health benefits:
Long-term care	91
Life operations	11
Annuity and supplemental insurance acquisition expenses	12
Other expenses	16
Total costs and expenses	138
Earnings before income taxes	$ 8

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Segments of Operations - Narrative (Details) $ in Millions	3 Months Ended						12 Months Ended
	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Dec. 31, 2017 USD ($) segment	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Segment Reporting Information [Line Items]
Number of segments | segment							4
Revenue derived from sales of property and casualty insurance outside of the United States							5.00%	4.00%	4.00%
Property and casualty insurance | Real estate investment
Segment Reporting Information [Line Items]
Pretax income from the sale of real estate properties included in other income				$ 13		$ 32		$ 32	$ 66
Property and casualty insurance | Other lines
Segment Reporting Information [Line Items]
Special charges to increase asbestos and environmental reserves		$ 89			$ 36		$ 89	36	67
Favorable reserve development related to certain lines of business within subsidiaries in connection with a reinsurance to close agreement							18
Special charges related to the exit of certain lines of business within subsidiaries						$ 65		65
Other
Segment Reporting Information [Line Items]
Special charges to increase asbestos and environmental reserves							24	$ 5	12
Make-whole premium, settlement of interest rate swap and write off of deferred debt issuance cost included in the loss on the retirement of debt	$ 40						$ 51
Write off of deferred debt issuance cost due to the retirement of debt		$ 4	$ 7						$ 4

XML

Segments of Operations - Assets by segment and sub-segment (Details) - USD ($) $ in Millions		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Total assets		$ 60,658	$ 55,072	$ 49,837
Property and casualty insurance
Segment Reporting Information [Line Items]
Total assets	[1]	17,171	15,574	14,689
Annuity
Segment Reporting Information [Line Items]
Total assets		37,179	33,409	29,865
Run-off long-term care and life
Segment Reporting Information [Line Items]
Total assets		730	752	772
Other
Segment Reporting Information [Line Items]
Total assets		$ 5,578	$ 5,337	$ 4,511

[1] Not allocable to sub-segments.

XML

Segments of Operations - Revenues by segment and sub-segment (Details) - USD ($) $ in Millions		3 Months Ended								12 Months Ended
		Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Total premiums earned										$ 4,579	$ 4,328	$ 4,224
Net investment income										1,831	1,696	1,633
Other income										206	224	243
Revenues before realized gains (losses)										6,860	6,477	6,325
Realized gains (losses) on securities										5	19	(19)
Realized gains (losses) on subsidiaries										0	2	(161)
Total revenues		$ 1,808	$ 1,835	$ 1,646	$ 1,576	$ 1,737	$ 1,705	$ 1,581	$ 1,475	6,865	6,498	6,145
Property and casualty insurance
Segment Reporting Information [Line Items]
Total premiums earned										4,579	4,328	4,224
Net investment income										362	350	319
Other income	[1]									28	51	78
Revenues before realized gains (losses)										4,969	4,729	4,621
Annuity
Segment Reporting Information [Line Items]
Net investment income										1,458	1,356	1,224
Other income										103	103	98
Revenues before realized gains (losses)										1,561	1,459	1,322
Run-off long-term care and life
Segment Reporting Information [Line Items]
Revenues before realized gains (losses)	[2]									47	49	188
Other
Segment Reporting Information [Line Items]
Revenues before realized gains (losses)										283	240	194
Property and transportation | Property and casualty insurance
Segment Reporting Information [Line Items]
Total premiums earned										1,711	1,662	1,599
Specialty casualty | Property and casualty insurance
Segment Reporting Information [Line Items]
Total premiums earned										2,186	2,006	2,011
Specialty financial | Property and casualty insurance
Segment Reporting Information [Line Items]
Total premiums earned										576	557	517
Other specialty | Property and casualty insurance
Segment Reporting Information [Line Items]
Total premiums earned										$ 106	$ 103	$ 97

[1] Includes income of $32 million (before noncontrolling interest) from the sale of an apartment property in 2016 and $66 million (before noncontrolling interest) from the sales of a hotel and an apartment property in 2015.

[2] AFG sold substantially all of its run-off long-term care insurance business in December 2015.

XML

Segments of Operations - Earnings before income taxes by segment and sub-segment (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Earnings before realized gains (losses) and income taxes		$ 719	$ 766	$ 745
Realized gains (losses) on securities		5	19	(19)
Realized gains (losses) on subsidiaries		0	2	(161)
Earnings before income taxes		724	787	565
Property and casualty insurance
Segment Reporting Information [Line Items]
Property and casualty insurance underwriting		242	236	225
Investment and other income, net	[1]	349	341	351
Earnings before realized gains (losses) and income taxes		591	577	576
Annuity
Segment Reporting Information [Line Items]
Earnings before realized gains (losses) and income taxes		380	368	331
Run-off long-term care and life
Segment Reporting Information [Line Items]
Earnings before realized gains (losses) and income taxes	[2]	6	2	14
Other
Segment Reporting Information [Line Items]
Earnings before realized gains (losses) and income taxes	[3]	(258)	(181)	(176)
Property and transportation | Property and casualty insurance
Segment Reporting Information [Line Items]
Property and casualty insurance underwriting		154	166	48
Specialty casualty | Property and casualty insurance
Segment Reporting Information [Line Items]
Property and casualty insurance underwriting		104	78	146
Specialty financial | Property and casualty insurance
Segment Reporting Information [Line Items]
Property and casualty insurance underwriting		61	84	87
Other specialty | Property and casualty insurance
Segment Reporting Information [Line Items]
Property and casualty insurance underwriting		(2)	9	14
Other lines | Property and casualty insurance
Segment Reporting Information [Line Items]
Property and casualty insurance underwriting	[4]	$ (75)	$ (101)	$ (70)

[1] Includes income of $32 million (before noncontrolling interest) from the sale of an apartment property in 2016 and $66 million (before noncontrolling interest) from the sales of a hotel and an apartment property in 2015.

[2] AFG sold substantially all of its run-off long-term care insurance business in December 2015.

[3] Primarily holding company interest and expenses, including losses on retirement of debt of $51 million in 2017 and $4 million in 2015, and special charges to increase A&E reserves related to AFG’s former railroad and manufacturing operations ($24 million in 2017, $5 million in 2016 and $12 million in 2015).

[4] Includes special charges to increase asbestos and environmental (“A&E”) reserves of $89 million, $36 million and $67 million in 2017, 2016 and 2015, respectively. Also includes $18 million in favorable development related to the Neon exited lines recorded in connection with a reinsurance to close transaction in 2017 and a charge of $65 million related to Neon exited lines in 2016.

XML

Fair Value Measurements - Narrative (Details) $ in Millions			12 Months Ended
		Dec. 24, 2015 USD ($)	Dec. 31, 2017 USD ($) professional	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Fair Value Measurements (Textual) [Abstract]
AFG's internal investment professionals | professional			25
Level 3 assets as a percentage of total assets measured at fair value			5.00%
Percentage of level 3 assets that were priced using non-binding broker quotes			79.00%
Level 3 assets that were priced using non-binding broker quotes			$ 1,800
Life contingent annuities			$ 206	$ 204
Maximum
Fair Value Measurements (Textual) [Abstract]
Percentage of internally developed Level 3 asset fair values to Shareholders' equity (are less than)			10.00%
Fixed-indexed annuities (embedded derivative)
Fair Value Measurements (Textual) [Abstract]
Fair value of derivatives in annuity benefits accumulated measured using a discounted cash flow approach			$ 2,540
Fixed-indexed annuities (embedded derivative) | Minimum
Fair Value Measurements (Textual) [Abstract]
Unobservable input surrenders used in Level 3 fair value determination			3.00%
Fixed-indexed annuities (embedded derivative) | Maximum
Fair Value Measurements (Textual) [Abstract]
Unobservable input surrenders used in Level 3 fair value determination			23.00%
Fixed-indexed annuities (embedded derivative), majority of future years | Minimum
Fair Value Measurements (Textual) [Abstract]
Unobservable input surrenders used in Level 3 fair value determination			6.00%
Fixed-indexed annuities (embedded derivative), majority of future years | Maximum
Fair Value Measurements (Textual) [Abstract]
Unobservable input surrenders used in Level 3 fair value determination			10.00%
Not Designated as Hedging Instrument | Annuity benefits | Fixed-indexed annuities (embedded derivative)
Fair Value Measurements (Textual) [Abstract]
Total realized/unrealized gains (losses) included in net income for the embedded derivatives related to the unlocking of actuarial assumptions			$ (25)	$ (17)	$ (28)
Run-off long-term care insurance business
Fair Value Measurements (Textual) [Abstract]
Net sale proceeds of the run-off long-term care insurance business	[1]	$ 13

[1] Includes the fair value of the potential additional consideration and capital maintenance agreement and is shown net of estimated expenses.

XML

Fair Value Measurements - Assets and liabilities measured and carried at fair value in the financial statements (Details) - USD ($) $ in Millions		Dec. 31, 2017	Dec. 31, 2016
Assets:
Available for sale (AFS) fixed maturities		$ 38,379	$ 34,544
Trading fixed maturities		348	359
Assets of managed investment entities (MIE)		4,902	4,765
Variable annuity assets (separate accounts)	[1]	644	600
Derivatives including equity index call options and other assets		701	492
Total assets accounted for at fair value		46,636	42,319
Liabilities:
Liabilities of managed investment entities		4,687	4,549
Total liabilities accounted for at fair value		7,264	6,337
Derivatives in annuity benefits accumulated
Liabilities:
Derivatives included in annuity benefits accumulated, long-term debt, and other liabilities		2,542	1,759
Derivatives in long-term debt
Liabilities:
Derivatives included in annuity benefits accumulated, long-term debt, and other liabilities			(1)
Other liabilities — derivatives
Liabilities:
Derivatives included in annuity benefits accumulated, long-term debt, and other liabilities		35	30
Fixed maturities
Assets:
Available for sale (AFS) fixed maturities		38,379	34,544
Trading fixed maturities		348	359
U.S. Government and government agencies
Assets:
Available for sale (AFS) fixed maturities		242	315
States, municipalities and political subdivisions
Assets:
Available for sale (AFS) fixed maturities		7,123	6,781
Foreign government
Assets:
Available for sale (AFS) fixed maturities		127	136
Residential MBS
Assets:
Available for sale (AFS) fixed maturities		3,227	3,635
Commercial MBS
Assets:
Available for sale (AFS) fixed maturities		962	1,493
Asset-backed securities (“ABS”)
Assets:
Available for sale (AFS) fixed maturities		7,962	5,959
Corporate and other
Assets:
Available for sale (AFS) fixed maturities		18,736	16,225
Equity securities
Assets:
Equity securities — AFS and trading		1,662	1,558
Other assets — derivatives
Assets:
Derivatives including equity index call options and other assets		0	1
Level 1
Assets:
Assets of managed investment entities (MIE)		307	380
Variable annuity assets (separate accounts)	[1]	0	0
Total assets accounted for at fair value		1,914	1,877
Liabilities:
Liabilities of managed investment entities		293	363
Total liabilities accounted for at fair value		293	363
Level 1 | Derivatives in annuity benefits accumulated
Liabilities:
Derivatives included in annuity benefits accumulated, long-term debt, and other liabilities		0	0
Level 1 | Derivatives in long-term debt
Liabilities:
Derivatives included in annuity benefits accumulated, long-term debt, and other liabilities			0
Level 1 | Other liabilities — derivatives
Liabilities:
Derivatives included in annuity benefits accumulated, long-term debt, and other liabilities		0	0
Level 1 | Fixed maturities
Assets:
Available for sale (AFS) fixed maturities		152	162
Trading fixed maturities		44	30
Level 1 | U.S. Government and government agencies
Assets:
Available for sale (AFS) fixed maturities		122	133
Level 1 | States, municipalities and political subdivisions
Assets:
Available for sale (AFS) fixed maturities		0	0
Level 1 | Foreign government
Assets:
Available for sale (AFS) fixed maturities		0	0
Level 1 | Residential MBS
Assets:
Available for sale (AFS) fixed maturities		0	0
Level 1 | Commercial MBS
Assets:
Available for sale (AFS) fixed maturities		0	0
Level 1 | Asset-backed securities (“ABS”)
Assets:
Available for sale (AFS) fixed maturities		0	0
Level 1 | Corporate and other
Assets:
Available for sale (AFS) fixed maturities		30	29
Level 1 | Equity securities
Assets:
Equity securities — AFS and trading		1,411	1,305
Level 1 | Other assets — derivatives
Assets:
Derivatives including equity index call options and other assets		0	0
Level 2
Assets:
Assets of managed investment entities (MIE)		4,572	4,356
Variable annuity assets (separate accounts)	[1]	644	600
Total assets accounted for at fair value		42,432	38,680
Liabilities:
Liabilities of managed investment entities		4,372	4,158
Total liabilities accounted for at fair value		4,407	4,187
Level 2 | Derivatives in annuity benefits accumulated
Liabilities:
Derivatives included in annuity benefits accumulated, long-term debt, and other liabilities		0	0
Level 2 | Derivatives in long-term debt
Liabilities:
Derivatives included in annuity benefits accumulated, long-term debt, and other liabilities			(1)
Level 2 | Other liabilities — derivatives
Liabilities:
Derivatives included in annuity benefits accumulated, long-term debt, and other liabilities		35	30
Level 2 | Fixed maturities
Assets:
Available for sale (AFS) fixed maturities		36,125	32,823
Trading fixed maturities		304	329
Level 2 | U.S. Government and government agencies
Assets:
Available for sale (AFS) fixed maturities		112	174
Level 2 | States, municipalities and political subdivisions
Assets:
Available for sale (AFS) fixed maturities		6,975	6,641
Level 2 | Foreign government
Assets:
Available for sale (AFS) fixed maturities		127	136
Level 2 | Residential MBS
Assets:
Available for sale (AFS) fixed maturities		3,105	3,445
Level 2 | Commercial MBS
Assets:
Available for sale (AFS) fixed maturities		926	1,468
Level 2 | Asset-backed securities (“ABS”)
Assets:
Available for sale (AFS) fixed maturities		7,218	5,475
Level 2 | Corporate and other
Assets:
Available for sale (AFS) fixed maturities		17,662	15,484
Level 2 | Equity securities
Assets:
Equity securities — AFS and trading		86	79
Level 2 | Other assets — derivatives
Assets:
Derivatives including equity index call options and other assets		0	1
Level 3
Assets:
Assets of managed investment entities (MIE)		23	29
Variable annuity assets (separate accounts)	[1]	0	0
Total assets accounted for at fair value		2,290	1,762
Liabilities:
Liabilities of managed investment entities		22	28
Total liabilities accounted for at fair value		2,564	1,787
Level 3 | Derivatives in annuity benefits accumulated
Liabilities:
Derivatives included in annuity benefits accumulated, long-term debt, and other liabilities		2,542	1,759
Level 3 | Derivatives in long-term debt
Liabilities:
Derivatives included in annuity benefits accumulated, long-term debt, and other liabilities			0
Level 3 | Other liabilities — derivatives
Liabilities:
Derivatives included in annuity benefits accumulated, long-term debt, and other liabilities		0	0
Level 3 | Fixed maturities
Assets:
Available for sale (AFS) fixed maturities		2,102	1,559
Trading fixed maturities		0	0
Level 3 | U.S. Government and government agencies
Assets:
Available for sale (AFS) fixed maturities		8	8
Level 3 | States, municipalities and political subdivisions
Assets:
Available for sale (AFS) fixed maturities		148	140
Level 3 | Foreign government
Assets:
Available for sale (AFS) fixed maturities		0	0
Level 3 | Residential MBS
Assets:
Available for sale (AFS) fixed maturities		122	190
Level 3 | Commercial MBS
Assets:
Available for sale (AFS) fixed maturities		36	25
Level 3 | Asset-backed securities (“ABS”)
Assets:
Available for sale (AFS) fixed maturities		744	484
Level 3 | Corporate and other
Assets:
Available for sale (AFS) fixed maturities		1,044	712
Level 3 | Equity securities
Assets:
Equity securities — AFS and trading		165	174
Level 3 | Other assets — derivatives
Assets:
Derivatives including equity index call options and other assets		0	0
Equity index call options | Equity index call options
Assets:
Derivatives including equity index call options and other assets		701	492
Equity index call options | Level 1 | Equity index call options
Assets:
Derivatives including equity index call options and other assets		0	0
Equity index call options | Level 2 | Equity index call options
Assets:
Derivatives including equity index call options and other assets		701	492
Equity index call options | Level 3 | Equity index call options
Assets:
Derivatives including equity index call options and other assets		$ 0	$ 0

[1] Variable annuity liabilities equal the fair value of variable annuity assets.

XML

Fair Value Measurements - Transfers between Level 1 and Level 2 (Details) $ in Millions	Dec. 31, 2017 USD ($) stock	Dec. 31, 2016 USD ($) stock	Dec. 31, 2015 USD ($) stock
Perpetual preferred stocks
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of stocks transferred from Level 2 to Level 1 | stock	4	6	5
Fair value of assets transferred from Level 2 to Level 1 | $	$ 23	$ 35	$ 19
Number of stocks transferred from Level 1 to Level 2 | stock	2	7	7
Fair value of assets transferred from Level 1 to Level 2 | $	$ 11	$ 28	$ 31
Common stocks
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of stocks transferred from Level 2 to Level 1 | stock	0	3	7
Fair value of assets transferred from Level 2 to Level 1 | $	$ 0	$ 0	$ 80
Number of stocks transferred from Level 1 to Level 2 | stock	1	2	0
Fair value of assets transferred from Level 1 to Level 2 | $	$ 0	$ 0	$ 0
Redeemable preferred stocks
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of stocks transferred from Level 2 to Level 1 | stock	0	0	2
Fair value of assets transferred from Level 2 to Level 1 | $	$ 0	$ 0	$ 11
Number of stocks transferred from Level 1 to Level 2 | stock	0	0	0
Fair value of assets transferred from Level 1 to Level 2 | $	$ 0	$ 0	$ 0

XML

Fair Value Measurements - Unobservable inputs used in determining fair value of embedded derivatives (Details) - Embedded derivatives	12 Months Ended
	Dec. 31, 2017
Unobservable inputs used by management in determining fair value of embedded derivatives
Risk margin for uncertainty in cash flows	0.70%
Minimum
Unobservable inputs used by management in determining fair value of embedded derivatives
Adjustment for insurance subsidiary's credit risk	0.20%
Surrenders	3.00%
Partial surrenders	2.00%
Annuitizations	0.10%
Deaths	1.60%
Budgeted option costs	2.40%
Maximum
Unobservable inputs used by management in determining fair value of embedded derivatives
Adjustment for insurance subsidiary's credit risk	2.00%
Surrenders	23.00%
Partial surrenders	10.00%
Annuitizations	1.00%
Deaths	8.00%
Budgeted option costs	3.60%

XML

Fair Value Measurements - Changes in balances of Level 3 financial assets carried at fair value (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Financial assets, Beginning Balance	$ 1,762	$ 1,636	$ 1,355
Impact of accounting change			0
Total realized/unrealized gains (losses) included in Net earnings	(39)	(35)	(31)
Total realized/unrealized gains (losses) included in other comprehensive income (loss)	17	21	(28)
Purchases and issuances	1,079	347	543
Sales and settlements	(437)	(217)	(183)
Transfer into Level 3	289	139	186
Transfer out of Level 3	(381)	(129)	(160)
Sale of subsidiaries			(46)
Financial assets, Ending Balance	2,290	1,762	1,636
Fixed maturities
Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Financial assets, Beginning Balance	1,559	1,470	1,231
Impact of accounting change			0
Total realized/unrealized gains (losses) included in Net earnings	(7)	(14)	(16)
Total realized/unrealized gains (losses) included in other comprehensive income (loss)	7	(14)	(19)
Purchases and issuances	1,032	291	460
Sales and settlements	(421)	(189)	(183)
Transfer into Level 3	289	124	186
Transfer out of Level 3	(357)	(109)	(143)
Sale of subsidiaries			(46)
Financial assets, Ending Balance	2,102	1,559	1,470
U.S. government agency
Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Financial assets, Beginning Balance	8	15	15
Impact of accounting change			0
Total realized/unrealized gains (losses) included in Net earnings	0	(8)	0
Total realized/unrealized gains (losses) included in other comprehensive income (loss)	0	1	0
Purchases and issuances	0	0	0
Sales and settlements	0	0	0
Transfer into Level 3	0	0	0
Transfer out of Level 3	0	0	0
Sale of subsidiaries			0
Financial assets, Ending Balance	8	8	15
State and municipal
Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Financial assets, Beginning Balance	140	89	100
Impact of accounting change			0
Total realized/unrealized gains (losses) included in Net earnings	0	0	0
Total realized/unrealized gains (losses) included in other comprehensive income (loss)	2	(4)	(1)
Purchases and issuances	0	57	34
Sales and settlements	(2)	(2)	(1)
Transfer into Level 3	10	0	2
Transfer out of Level 3	(2)	0	(39)
Sale of subsidiaries			(6)
Financial assets, Ending Balance	148	140	89
Residential MBS
Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Financial assets, Beginning Balance	190	224	300
Impact of accounting change			0
Total realized/unrealized gains (losses) included in Net earnings	(4)	(4)	(11)
Total realized/unrealized gains (losses) included in other comprehensive income (loss)	2	(2)	(1)
Purchases and issuances	1	8	0
Sales and settlements	(40)	(28)	(34)
Transfer into Level 3	44	34	86
Transfer out of Level 3	(71)	(42)	(88)
Sale of subsidiaries			(28)
Financial assets, Ending Balance	122	190	224
Commercial MBS
Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Financial assets, Beginning Balance	25	39	44
Impact of accounting change			0
Total realized/unrealized gains (losses) included in Net earnings	2	(1)	(1)
Total realized/unrealized gains (losses) included in other comprehensive income (loss)	0	0	(1)
Purchases and issuances	15	0	0
Sales and settlements	(10)	(7)	(2)
Transfer into Level 3	4	0	4
Transfer out of Level 3	0	(6)	(1)
Sale of subsidiaries			(4)
Financial assets, Ending Balance	36	25	39
Asset-backed securities
Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Financial assets, Beginning Balance	484	470	226
Impact of accounting change			0
Total realized/unrealized gains (losses) included in Net earnings	0	(1)	1
Total realized/unrealized gains (losses) included in other comprehensive income (loss)	1	1	(7)
Purchases and issuances	410	50	265
Sales and settlements	(132)	(52)	(56)
Transfer into Level 3	202	60	53
Transfer out of Level 3	(221)	(44)	(10)
Sale of subsidiaries			(2)
Financial assets, Ending Balance	744	484	470
Corporate and other
Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Financial assets, Beginning Balance	712	633	546
Impact of accounting change			0
Total realized/unrealized gains (losses) included in Net earnings	(5)	0	(5)
Total realized/unrealized gains (losses) included in other comprehensive income (loss)	2	(10)	(9)
Purchases and issuances	606	176	161
Sales and settlements	(237)	(100)	(90)
Transfer into Level 3	29	30	41
Transfer out of Level 3	(63)	(17)	(5)
Sale of subsidiaries			(6)
Financial assets, Ending Balance	1,044	712	633
Equity securities
Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Financial assets, Beginning Balance	174	140	93
Impact of accounting change			0
Total realized/unrealized gains (losses) included in Net earnings	(21)	(12)	(4)
Total realized/unrealized gains (losses) included in other comprehensive income (loss)	10	35	(9)
Purchases and issuances	38	44	77
Sales and settlements	(16)	(28)	0
Transfer into Level 3	0	15	0
Transfer out of Level 3	(20)	(20)	(17)
Sale of subsidiaries			0
Financial assets, Ending Balance	165	174	140
Assets of MIE
Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Financial assets, Beginning Balance	29	26	31
Impact of accounting change			0
Total realized/unrealized gains (losses) included in Net earnings	(11)	(9)	(11)
Total realized/unrealized gains (losses) included in other comprehensive income (loss)	0	0	0
Purchases and issuances	9	12	6
Sales and settlements	0	0	0
Transfer into Level 3	0	0	0
Transfer out of Level 3	(4)	0	0
Sale of subsidiaries			0
Financial assets, Ending Balance	$ 23	$ 29	$ 26

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Fair Value Measurements - Changes in balances of Level 3 financial liabilities carried at fair value (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017		Dec. 31, 2016		Dec. 31, 2015
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial liabilities, Beginning Balance		$ (1,759)	[1]	$ (1,369)		$ (3,861)
Impact of accounting change						2,701
Total realized/unrealized gains (losses) included in Net earnings		(589)		(211)		(17)
Total realized/unrealized gains (losses) included in other comprehensive income (loss)		0		0		0
Purchases and issuances		(300)		(277)		(257)
Sales and settlements		106		98		65
Transfer into Level 3		0		0		0
Transfer out of Level 3		0		0		0
Sale of subsidiaries						0
Financial liabilities, Ending Balance		(2,542)	[2]	(1,759)	[1]	(1,369)
Liabilities of MIE
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial liabilities, Beginning Balance				0		(2,701)
Impact of accounting change	[3]					2,701
Total realized/unrealized gains (losses) included in Net earnings						0
Total realized/unrealized gains (losses) included in other comprehensive income (loss)						0
Purchases and issuances						0
Sales and settlements						0
Transfer into Level 3						0
Transfer out of Level 3						0
Sale of subsidiaries						0
Financial liabilities, Ending Balance						0
Embedded derivatives
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial liabilities, Beginning Balance		(1,759)		(1,369)		(1,160)
Impact of accounting change						0
Total realized/unrealized gains (losses) included in Net earnings		(589)	[4]	(211)	[5]	(17)	[6]
Total realized/unrealized gains (losses) included in other comprehensive income (loss)		0		0		0
Purchases and issuances		(300)		(277)		(257)
Sales and settlements		106		98		65
Transfer into Level 3		0		0		0
Transfer out of Level 3		0		0		0
Sale of subsidiaries						0
Financial liabilities, Ending Balance		$ (2,542)		$ (1,759)		$ (1,369)

[1] As previously discussed, these tables exclude the portion of MIE liabilities allocated to Level 3, which are derived from the fair value of the MIE assets.

[2] As previously discussed, these tables exclude the portion of MIE liabilities allocated to Level 3, which are derived from the fair value of the MIE assets.

[3] The impact of implementing new guidance adopted in 2015, as discussed in Note A — “Accounting Policies — Managed Investment Entities.”

[4] Total realized/unrealized gains (losses) included in net earnings for the embedded derivatives reflects losses related to the unlocking of actuarial assumptions of $25 million in 2017.

[5] Total realized/unrealized gains (losses) included in net earnings for the embedded derivatives reflects losses related to the unlocking of actuarial assumptions of $17 million in 2016.

[6] Total realized/unrealized gains (losses) included in net earnings for the embedded derivatives reflects losses related to the unlocking of actuarial assumptions of $28 million in 2015.

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Fair Value Measurements - The carrying value and fair value of financial instruments (Details) - USD ($) $ in Millions		Dec. 31, 2017	Dec. 31, 2016
Financial assets:
Mortgage loans		$ 1,125	$ 1,147
Policy loans		184	192
Financial liabilities:
Long-term debt		1,301	1,283
Level 1
Financial assets:
Cash and cash equivalents		2,338	2,107
Mortgage loans		0	0
Policy loans		0	0
Total financial assets not accounted for at fair value		2,338	2,107
Financial liabilities:
Annuity benefits accumulated	[1]	0	0
Long-term debt		0	0
Total financial liabilities not accounted for at fair value		0	0
Level 2
Financial assets:
Cash and cash equivalents		0	0
Mortgage loans		0	0
Policy loans		0	0
Total financial assets not accounted for at fair value		0	0
Financial liabilities:
Annuity benefits accumulated	[1]	0	0
Long-term debt		1,351	1,353
Total financial liabilities not accounted for at fair value		1,351	1,353
Level 3
Financial assets:
Cash and cash equivalents		0	0
Mortgage loans		1,119	1,146
Policy loans		184	192
Total financial assets not accounted for at fair value		1,303	1,338
Financial liabilities:
Annuity benefits accumulated	[1]	32,461	28,932
Long-term debt		3	3
Total financial liabilities not accounted for at fair value		32,464	28,935
Carrying Value
Financial assets:
Cash and cash equivalents		2,338	2,107
Mortgage loans		1,125	1,147
Policy loans		184	192
Total financial assets not accounted for at fair value		3,647	3,446
Financial liabilities:
Annuity benefits accumulated	[1]	33,110	29,703
Long-term debt		1,301	1,284
Total financial liabilities not accounted for at fair value		34,411	30,987
Fair Value
Financial assets:
Cash and cash equivalents		2,338	2,107
Mortgage loans		1,119	1,146
Policy loans		184	192
Total financial assets not accounted for at fair value		3,641	3,445
Financial liabilities:
Annuity benefits accumulated	[1]	32,461	28,932
Long-term debt		1,354	1,356
Total financial liabilities not accounted for at fair value		$ 33,815	$ 30,288

[1] Excludes $206 million and $204 million of life contingent annuities in the payout phase at December 31, 2017 and 2016, respectively.

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Investments - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($) security	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Investment [Line Items]
Percentage (based on amount of unrealized loss) of available for sale fixed maturities that are in an unrealized loss position and rated investment grade	78.00%
Percentage (based on fair value) of available for sale fixed maturities that are in an unrealized loss position and rated investment grade	90.00%
Other than temporary impairment charges	$ 73	$ 116	$ 125
Average life of ABS	5 years
Average life of MBS	4 years 6 months
Residential MBS
Investment [Line Items]
Non-credit related portion of other-than-temporary impairment charges taken for securities still owned	$ 158	189
Fixed maturities, Gross Unrealized, Losses	(6)	(13)
Other than temporary impairment charges	1
Fixed Maturities excluding Residential MBS
Investment [Line Items]
Other than temporary impairment charges	19
Securities with non-credit other-than-temporary impairment charges
Investment [Line Items]
Gross Unrealized, Gains	137	130
Gross Unrealized, Losses	(4)	(3)
Fixed maturities
Investment [Line Items]
Fixed maturities, Gross Unrealized, Losses	$ (82)	(245)
Number of available for sale securities in an unrealized loss position | security	841
Other than temporary impairment charges	$ 20	38	$ 43
Other investments
Investment [Line Items]
Other than temporary impairment charges	$ 4
Common stocks
Investment [Line Items]
Number of available for sale securities in an unrealized loss position | security	16
Other than temporary impairment charges	$ 55
Equity securities, Gross Unrealized, Losses	$ (22)	(23)
Preferred stocks
Investment [Line Items]
Number of available for sale securities in an unrealized loss position | security	7
Other than temporary impairment charges	$ 9
Equity securities, Gross Unrealized, Losses	$ (1)	$ (7)
Number of available for sale securities in an unrealized loss position for twelve months or longer | Common stocks
Investment [Line Items]
Number of available for sale securities in an unrealized loss position | security	0
Number of available for sale securities in an unrealized loss position for twelve months or longer | Preferred stocks
Investment [Line Items]
Number of available for sale securities in an unrealized loss position | security	3

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Investments - Available for sale fixed maturities and equity securities (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Fixed maturities, Available for sale, Amortized Cost	$ 37,038	$ 33,735
Available for sale (AFS) fixed maturities	38,379	34,544
Equity securities, Available for sale, Amortized Cost	1,321	1,351
Equity securities, Available for sale, Fair Value	1,600	1,502
Total fixed maturities
Schedule of Available-for-sale Securities [Line Items]
Fixed maturities, Available for sale, Amortized Cost	37,038	33,735
Fixed maturities, Available for sale, Gross Unrealized, Gains	1,423	1,054
Fixed maturities, Available for sale, Gross Unrealized, Losses	(82)	(245)
Fixed maturities, Available for sale, Net Unrealized, Gains (Losses)	1,341	809
Available for sale (AFS) fixed maturities	38,379	34,544
U.S. Government and government agencies
Schedule of Available-for-sale Securities [Line Items]
Fixed maturities, Available for sale, Amortized Cost	244	315
Fixed maturities, Available for sale, Gross Unrealized, Gains	1	3
Fixed maturities, Available for sale, Gross Unrealized, Losses	(3)	(3)
Fixed maturities, Available for sale, Net Unrealized, Gains (Losses)	(2)	0
Available for sale (AFS) fixed maturities	242	315
States, municipalities and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Fixed maturities, Available for sale, Amortized Cost	6,887	6,650
Fixed maturities, Available for sale, Gross Unrealized, Gains	254	200
Fixed maturities, Available for sale, Gross Unrealized, Losses	(18)	(69)
Fixed maturities, Available for sale, Net Unrealized, Gains (Losses)	236	131
Available for sale (AFS) fixed maturities	7,123	6,781
Foreign government
Schedule of Available-for-sale Securities [Line Items]
Fixed maturities, Available for sale, Amortized Cost	124	131
Fixed maturities, Available for sale, Gross Unrealized, Gains	3	5
Fixed maturities, Available for sale, Gross Unrealized, Losses	0	0
Fixed maturities, Available for sale, Net Unrealized, Gains (Losses)	3	5
Available for sale (AFS) fixed maturities	127	136
Residential MBS
Schedule of Available-for-sale Securities [Line Items]
Fixed maturities, Available for sale, Amortized Cost	2,884	3,367
Fixed maturities, Available for sale, Gross Unrealized, Gains	349	281
Fixed maturities, Available for sale, Gross Unrealized, Losses	(6)	(13)
Fixed maturities, Available for sale, Net Unrealized, Gains (Losses)	343	268
Available for sale (AFS) fixed maturities	3,227	3,635
Commercial MBS
Schedule of Available-for-sale Securities [Line Items]
Fixed maturities, Available for sale, Amortized Cost	927	1,446
Fixed maturities, Available for sale, Gross Unrealized, Gains	36	49
Fixed maturities, Available for sale, Gross Unrealized, Losses	(1)	(2)
Fixed maturities, Available for sale, Net Unrealized, Gains (Losses)	35	47
Available for sale (AFS) fixed maturities	962	1,493
Asset-backed securities
Schedule of Available-for-sale Securities [Line Items]
Fixed maturities, Available for sale, Amortized Cost	7,836	5,962
Fixed maturities, Available for sale, Gross Unrealized, Gains	142	43
Fixed maturities, Available for sale, Gross Unrealized, Losses	(16)	(46)
Fixed maturities, Available for sale, Net Unrealized, Gains (Losses)	126	(3)
Available for sale (AFS) fixed maturities	7,962	5,959
Corporate and other
Schedule of Available-for-sale Securities [Line Items]
Fixed maturities, Available for sale, Amortized Cost	18,136	15,864
Fixed maturities, Available for sale, Gross Unrealized, Gains	638	473
Fixed maturities, Available for sale, Gross Unrealized, Losses	(38)	(112)
Fixed maturities, Available for sale, Net Unrealized, Gains (Losses)	600	361
Available for sale (AFS) fixed maturities	18,736	16,225
Total equity securities
Schedule of Available-for-sale Securities [Line Items]
Equity securities, Available for sale, Amortized Cost	1,321	1,351
Equity securities, Available for sale, Gross Unrealized, Gains	302	181
Equity securities, Available for sale, Gross Unrealized, Losses	(23)	(30)
Equity securities, Available for sale, Net Unrealized, Gains (Losses)	279	151
Equity securities, Available for sale, Fair Value	1,600	1,502
Common stocks
Schedule of Available-for-sale Securities [Line Items]
Equity securities, Available for sale, Amortized Cost	786	879
Equity securities, Available for sale, Gross Unrealized, Gains	263	160
Equity securities, Available for sale, Gross Unrealized, Losses	(22)	(23)
Equity securities, Available for sale, Net Unrealized, Gains (Losses)	241	137
Equity securities, Available for sale, Fair Value	1,027	1,016
Perpetual preferred stocks
Schedule of Available-for-sale Securities [Line Items]
Equity securities, Available for sale, Amortized Cost	535	472
Equity securities, Available for sale, Gross Unrealized, Gains	39	21
Equity securities, Available for sale, Gross Unrealized, Losses	(1)	(7)
Equity securities, Available for sale, Net Unrealized, Gains (Losses)	38	14
Equity securities, Available for sale, Fair Value	$ 573	$ 486

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Investments - Gross unrealized losses on securities by investment category and length of time that have been in a continuous unrealized loss position (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Fixed maturities
Available-for-sale securities in a continuous unrealized loss position
Unrealized Loss - Less than twelve months	$ (37)	$ (196)
Fair Value - Less than twelve months	$ 4,295	$ 8,651
Fair Value as % of Cost - Less than twelve months	99.00%	98.00%
Unrealized Loss - Twelve months or more	$ (45)	$ (49)
Fair Value - Twelve months or more	$ 1,574	$ 1,160
Fair Value as % of Cost - Twelve months or more	97.00%	96.00%
U.S. Government and government agencies
Available-for-sale securities in a continuous unrealized loss position
Unrealized Loss - Less than twelve months	$ 0	$ (1)
Fair Value - Less than twelve months	$ 55	$ 153
Fair Value as % of Cost - Less than twelve months	100.00%	99.00%
Unrealized Loss - Twelve months or more	$ (3)	$ (2)
Fair Value - Twelve months or more	$ 123	$ 8
Fair Value as % of Cost - Twelve months or more	98.00%	80.00%
States, municipalities and political subdivisions
Available-for-sale securities in a continuous unrealized loss position
Unrealized Loss - Less than twelve months	$ (8)	$ (64)
Fair Value - Less than twelve months	$ 825	$ 2,289
Fair Value as % of Cost - Less than twelve months	99.00%	97.00%
Unrealized Loss - Twelve months or more	$ (10)	$ (5)
Fair Value - Twelve months or more	$ 431	$ 44
Fair Value as % of Cost - Twelve months or more	98.00%	90.00%
Foreign government
Available-for-sale securities in a continuous unrealized loss position
Unrealized Loss - Less than twelve months	$ 0
Fair Value - Less than twelve months	$ 4
Fair Value as % of Cost - Less than twelve months	100.00%
Unrealized Loss - Twelve months or more	$ 0
Fair Value - Twelve months or more	$ 0
Fair Value as % of Cost - Twelve months or more	0.00%
Residential MBS
Available-for-sale securities in a continuous unrealized loss position
Unrealized Loss - Less than twelve months	$ (1)	$ (7)
Fair Value - Less than twelve months	$ 118	$ 502
Fair Value as % of Cost - Less than twelve months	99.00%	99.00%
Unrealized Loss - Twelve months or more	$ (5)	$ (6)
Fair Value - Twelve months or more	$ 118	$ 162
Fair Value as % of Cost - Twelve months or more	96.00%	96.00%
Commercial MBS
Available-for-sale securities in a continuous unrealized loss position
Unrealized Loss - Less than twelve months	$ (1)	$ (2)
Fair Value - Less than twelve months	$ 67	$ 121
Fair Value as % of Cost - Less than twelve months	99.00%	98.00%
Unrealized Loss - Twelve months or more	$ 0	$ 0
Fair Value - Twelve months or more	$ 0	$ 0
Fair Value as % of Cost - Twelve months or more	0.00%	0.00%
Asset-backed securities
Available-for-sale securities in a continuous unrealized loss position
Unrealized Loss - Less than twelve months	$ (7)	$ (29)
Fair Value - Less than twelve months	$ 1,195	$ 1,737
Fair Value as % of Cost - Less than twelve months	99.00%	98.00%
Unrealized Loss - Twelve months or more	$ (9)	$ (17)
Fair Value - Twelve months or more	$ 299	$ 634
Fair Value as % of Cost - Twelve months or more	97.00%	97.00%
Corporate and other
Available-for-sale securities in a continuous unrealized loss position
Unrealized Loss - Less than twelve months	$ (20)	$ (93)
Fair Value - Less than twelve months	$ 2,031	$ 3,849
Fair Value as % of Cost - Less than twelve months	99.00%	98.00%
Unrealized Loss - Twelve months or more	$ (18)	$ (19)
Fair Value - Twelve months or more	$ 603	$ 312
Fair Value as % of Cost - Twelve months or more	97.00%	94.00%
Equity securities
Available-for-sale securities in a continuous unrealized loss position
Unrealized Loss - Less than twelve months	$ (22)	$ (29)
Fair Value - Less than twelve months	$ 158	$ 350
Fair Value as % of Cost - Less than twelve months	88.00%	92.00%
Unrealized Loss - Twelve months or more	$ (1)	$ (1)
Fair Value - Twelve months or more	$ 13	$ 6
Fair Value as % of Cost - Twelve months or more	93.00%	86.00%
Common stocks
Available-for-sale securities in a continuous unrealized loss position
Unrealized Loss - Less than twelve months	$ (22)	$ (23)
Fair Value - Less than twelve months	$ 117	$ 215
Fair Value as % of Cost - Less than twelve months	84.00%	90.00%
Unrealized Loss - Twelve months or more	$ 0	$ 0
Fair Value - Twelve months or more	$ 0	$ 0
Fair Value as % of Cost - Twelve months or more	0.00%	0.00%
Perpetual preferred stocks
Available-for-sale securities in a continuous unrealized loss position
Unrealized Loss - Less than twelve months	$ 0	$ (6)
Fair Value - Less than twelve months	$ 41	$ 135
Fair Value as % of Cost - Less than twelve months	100.00%	96.00%
Unrealized Loss - Twelve months or more	$ (1)	$ (1)
Fair Value - Twelve months or more	$ 13	$ 6
Fair Value as % of Cost - Twelve months or more	93.00%	86.00%

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Investments - Credit portion of other-than-temporary impairments on fixed maturities for which the non-credit portion of an impairment has been recognized in OCI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Balance at January 1	$ 153	$ 160	$ 170
Additional credit impairments on:
Previously impaired securities	1	2	1
Securities without prior impairments	3	1	2
Reductions due to:
Sales or redemptions	(12)	(10)	(9)
Sale of subsidiaries	0	0	(4)
Balance at December 31	$ 145	$ 153	$ 160

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Investments - Scheduled maturities of available for sale fixed maturities (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($)
Fair Value Percent, Fiscal Year Maturity [Abstract]
Average life of ABS	5 years
Average life of MBS	4 years 6 months
Fixed maturities
Amortized Cost Basis, Fiscal Year Maturity [Abstract]
One year or less	$ 746
After one year through five years	6,730
After five years through ten years	13,235
After ten years	4,680
Fixed maturities amortized cost, Subtotal	25,391
ABS (average life of approximately 5 years)	7,836
MBS (average life of approximately 4.5 years)	3,811
Amortized Cost	37,038
Fair Value, Fiscal Year Maturity [Abstract]
One year or less	759
After one year through five years	6,939
After five years through ten years	13,662
After ten years	4,868
Fixed maturities fair value, Subtotal	26,228
ABS (average life of approximately 5 years)	7,962
MBS (average life of approximately 4.5 years)	4,189
Fair Value	$ 38,379
Fair Value Percent, Fiscal Year Maturity [Abstract]
One year or less	2.00%
After one year through five years	18.00%
After five years through ten years	35.00%
After ten years	13.00%
Fixed maturities fair value, Subtotal, Percent	68.00%
ABS (average life of approximately 5 years)	21.00%
MBS (average life of approximately 4.5 years)	11.00%
Fair value, Total, Percent	100.00%

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Investments - Components of the net unrealized gain on securities that is included in AOCI in the Balance Sheet (Details) - USD ($) $ in Millions		Dec. 31, 2017	Dec. 31, 2016
Unrealized gain on:
Pretax		$ 1,063	$ 622
Deferred Tax		(223)	(218)
Net		840	404
Total investments
Unrealized gain on:
Pretax		1,620	960
Deferred Tax		(340)	(336)
Net		1,280	624
Total fixed maturities
Unrealized gain on:
Pretax		1,341	809
Deferred Tax		(282)	(283)
Net		1,059	526
Fixed maturities — annuity segment
Unrealized gain on:
Pretax	[1]	1,082	640
Deferred Tax	[1]	(227)	(224)
Net	[1]	855	416
Fixed maturities — all other
Unrealized gain on:
Pretax		259	169
Deferred Tax		(55)	(59)
Net		204	110
Equity securities
Unrealized gain on:
Pretax	[2]	279	151
Deferred Tax	[2]	(58)	(53)
Net	[2]	221	98
Deferred policy acquisition costs — annuity segment
Unrealized gain on:
Pretax		(433)	(273)
Deferred Tax		91	96
Net		(342)	(177)
Annuity benefits accumulated
Unrealized gain on:
Pretax		(137)	(78)
Deferred Tax		29	27
Net		(108)	(51)
Unearned revenue
Unrealized gain on:
Pretax		13	13
Deferred Tax		(3)	(5)
Net		$ 10	$ 8

[1] Net unrealized gains on fixed maturity investments supporting AFG’s annuity benefits accumulated.

[2] As discussed in Note A — “Accounting Policies — Investments,” effective January 1, 2018, all equity securities currently classified as “available for sale” will be required to be carried at fair value through net earnings instead of AOCI.

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Investments - Real estate and other investments included on the Balance Sheet (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Investment [Line Items]
Limited partnerships and similar investments accounted for using the equity method	$ 999	$ 688
Directly owned real estate	164	197
Other investments	1,311	1,034
Other investments
Investment [Line Items]
Other investments	$ 148	$ 149

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Investments - Schedule of sources of net investment income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net Investment Income [Line Items]
Gross investment income	$ 1,852	$ 1,716	$ 1,651
Investment expenses	(21)	(20)	(18)
Net investment income	1,831	1,696	1,633
Fixed maturities
Net Investment Income [Line Items]
Gross investment income	1,607	1,510	1,461
Equity securities
Net Investment Income [Line Items]
Gross investment income	79	81	76
Equity in earnings of partnerships and similar investments
Net Investment Income [Line Items]
Gross investment income	64	44	27
Other
Net Investment Income [Line Items]
Gross investment income	$ 102	$ 81	$ 87

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Investments - Realized gains (losses) and changes in unrealized appreciation (depreciation) related to fixed maturity and equity security investments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Realized gains (losses) and changes in unrealized appreciation (depreciation) related to fixed maturity and equity security investments
Realized before impairments	$ 78	$ 135	$ 106
Realized - impairments	(73)	(116)	(125)
Total realized gains (losses) on securities	5	19	(19)
Net of tax and noncontrolling interests
Realized gains (losses) and changes in unrealized appreciation (depreciation) related to fixed maturity and equity security investments
Realized before impairments	51	85	66
Realized - impairments	(48)	(72)	(78)
Total realized gains (losses) on securities	3	13	(12)
Change in unrealized	436	72	(411)
Total pretax
Realized gains (losses) and changes in unrealized appreciation (depreciation) related to fixed maturity and equity security investments
Realized before impairments	78	135	106
Realized - impairments	(73)	(116)	(125)
Total realized gains (losses) on securities	5	19	(19)
Change in unrealized	441	105	(645)
Fixed maturities
Realized gains (losses) and changes in unrealized appreciation (depreciation) related to fixed maturity and equity security investments
Realized before impairments	17	36	19
Realized - impairments	(20)	(38)	(43)
Total realized gains (losses) on securities	(3)	(2)	(24)
Change in unrealized	532	90	(941)
Equity securities
Realized gains (losses) and changes in unrealized appreciation (depreciation) related to fixed maturity and equity security investments
Realized before impairments	70	106	94
Realized - impairments	(64)	(93)	(94)
Total realized gains (losses) on securities	6	13	0
Change in unrealized	128	67	(134)
Mortgage loans and other investments
Realized gains (losses) and changes in unrealized appreciation (depreciation) related to fixed maturity and equity security investments
Realized before impairments	(6)	0	(2)
Realized - impairments	(4)	0	(3)
Total realized gains (losses) on securities	(10)	0	(5)
Change in unrealized	0	0	0
Other, Including DPAC and reserves on annuities and long-term care
Realized gains (losses) and changes in unrealized appreciation (depreciation) related to fixed maturity and equity security investments
Realized before impairments	(3)	(7)	(5)
Realized - impairments	15	15	15
Total realized gains (losses) on securities	12	8	10
Change in unrealized	(219)	(52)	430
Tax effects
Realized gains (losses) and changes in unrealized appreciation (depreciation) related to fixed maturity and equity security investments
Realized before impairments	(27)	(48)	(38)
Realized - impairments	25	41	45
Total realized gains (losses) on securities	(2)	(7)	7
Change in unrealized	(5)	(37)	226
Noncontrolling interests
Realized gains (losses) and changes in unrealized appreciation (depreciation) related to fixed maturity and equity security investments
Realized before impairments	0	(2)	(2)
Realized - impairments	0	3	2
Total realized gains (losses) on securities	0	1	0
Change in unrealized	$ 0	$ 4	$ 8

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Investments - Gross realized gains and losses on available for sale fixed maturity and equity security investment transactions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Fixed maturities
Gross realized gains and losses on the sale of available for sale fixed maturity and equity security investments
Gross gains	$ 43	$ 55	$ 38
Gross losses	(20)	(10)	(7)
Equity securities
Gross realized gains and losses on the sale of available for sale fixed maturity and equity security investments
Gross gains	87	110	99
Gross losses	$ (17)	$ (4)	$ (5)

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Derivatives - Narrative (Details)	1 Months Ended	12 Months Ended
	Dec. 31, 2017 USD ($) swap	Dec. 31, 2017 USD ($) swap	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 11, 2017	Jun. 30, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Carrying value of collateral received to support purchased call options	$ 389,000,000	$ 389,000,000	$ 380,000,000
Senior Notes | 9-7/8% Senior Notes due June 2019
Derivative Instruments, Gain (Loss) [Line Items]
Stated interest rate, percentage	9.875%	9.875%				9.875%
AFG
Derivative Instruments, Gain (Loss) [Line Items]
Interest rate description of fair value hedge activity		three-month LIBOR plus 8.099%
AFG | Senior Notes | 9-7/8% Senior Notes due June 2019
Derivative Instruments, Gain (Loss) [Line Items]
Stated interest rate, percentage	9.875%	9.875%	9.875%		9.875%	9.875%
Not Designated as Hedging Instrument | Fixed-indexed annuities (embedded derivative) | Annuity benefits
Derivative Instruments, Gain (Loss) [Line Items]
The portion of the change in fair value of the embedded derivative related to the unlocking of actuarial assumptions		$ (25,000,000)	$ (17,000,000)	$ (28,000,000)
Designated as Hedging Instrument | Interest rate swaps | Cash Flow Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of derivative instrument outstanding	$ 1,580,000,000.00	$ 1,580,000,000.00	1,080,000,000.00
Designated as Hedging Instrument | Interest rate swaps | Cash Flow Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Number of interest rate swaps designated and qualifying as a cash flow hedges | swap	10	10
Number of interest rate swaps entered into during the period | swap		3
Gain (loss) reclassified from AOCI into net investment income		$ 6,000,000	7,000,000	6,000,000
Gain (loss) on cash flow hedge ineffectiveness recorded in Net Earnings		0	0	0
Collateral receivable supporting interest rate swaps	$ 70,000,000	70,000,000	60,000,000
Designated as Hedging Instrument | Interest rate swaps | Cash Flow Hedges | Other assets
Derivative Instruments, Gain (Loss) [Line Items]
Net derivatives, at fair value			1,000,000
Designated as Hedging Instrument | Interest rate swaps | Cash Flow Hedges | Other assets | Maximum
Derivative Instruments, Gain (Loss) [Line Items]
Net derivatives, at fair value	1,000,000	1,000,000
Designated as Hedging Instrument | Interest rate swaps | Cash Flow Hedges | Other liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Net derivatives, at fair value	(31,000,000)	(31,000,000)	(22,000,000)
Designated as Hedging Instrument | Interest rate swaps | Cash Flow Hedges | New interest rate swaps entered into during the period
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of derivative instrument outstanding	663,000,000	663,000,000
Designated as Hedging Instrument | Interest rate swaps | Fair Value Hedge | AFG
Derivative Instruments, Gain (Loss) [Line Items]
The net reduction in interest expense from interest rate swaps		$ 2,000,000	3,000,000	$ 2,000,000
Designated as Hedging Instrument | Interest rate swaps | Fair Value Hedge | AFG | Senior Notes | 9-7/8% Senior Notes due June 2019
Derivative Instruments, Gain (Loss) [Line Items]
Settlement of interest rate swap included in the loss on the retirement of debt	$ (1,000,000)
Designated as Hedging Instrument | Interest rate swaps | Fair Value Hedge | AFG | LIBOR
Derivative Instruments, Gain (Loss) [Line Items]
Basis spread on variable interest rate					8.099%
Designated as Hedging Instrument | Interest rate swaps | Fair Value Hedge | Long-term debt | AFG
Derivative Instruments, Gain (Loss) [Line Items]
Net derivatives, at fair value			$ 1,000,000

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Derivatives - Derivatives that do not qualify for hedge accounting under GAAP included in the Balance Sheet at fair value (Details) - Not Designated as Hedging Instrument - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Derivatives included in AFG' s Balance Sheet at fair value
Derivative asset, at fair value	$ 810	$ 603
Derivative liability, at fair value	2,546	1,767
MBS with embedded derivatives | Fixed maturities
Derivatives included in AFG' s Balance Sheet at fair value
Derivative asset, at fair value	105	107
Public company warrants | Equity securities
Derivatives included in AFG' s Balance Sheet at fair value
Derivative asset, at fair value	4	4
Fixed-indexed annuities (embedded derivative) | Annuity benefits accumulated
Derivatives included in AFG' s Balance Sheet at fair value
Derivative liability, at fair value	2,542	1,759
Equity index call options | Equity index call options
Derivatives included in AFG' s Balance Sheet at fair value
Derivative asset, at fair value	701	492
Reinsurance contract (embedded derivative) | Other liabilities
Derivatives included in AFG' s Balance Sheet at fair value
Derivative liability, at fair value	$ 4	$ 8

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Derivatives - Gain (loss) included in the Statement of Earnings for changes in the fair value of derivatives that do not qualify for hedge accounting (Details) - Not Designated as Hedging Instrument - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net		$ (103)	$ (80)	$ (83)
MBS with embedded derivatives | Realized gains (losses) on securities
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net		(6)	(9)	(16)
Public company warrants | Realized gains (losses) on securities
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net		0	0	0
Fixed-indexed annuities (embedded derivative) | Annuity benefits
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	[1]	(589)	(211)	(17)
Equity index call options | Annuity benefits
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net		494	141	(56)
Reinsurance contract (embedded derivative) | Net investment income
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net		$ (2)	$ (1)	$ 6

[1] The change in fair value of the embedded derivative includes losses related to unlocking of actuarial assumptions of $25 million in 2017 compared to $17 million in 2016 and $28 million in 2015.

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Deferred Policy Acquisition Costs - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Deferred Policy Acquisition Costs Disclosures [Abstract]
Accumulated amortization of present value of future profits	$ 141	$ 134
Approximate annual rate of decrease in present value of future profits during next five years	12.50%

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Deferred Policy Acquisition Costs - Progression of deferred policy acquisition costs (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Movement Analysis of Deferred Policy Acquisition Costs and Present Value of Future Profits [Roll Forward]
Deferred policy acquisition costs and present value of future profits, beginning balance		$ 1,239	$ 1,184	$ 821
Deferred policy acquisition costs and present value of future profits, additions		817	774	754
Deferred policy acquisition costs and present value of future profits, periodic amortization		(744)	(722)	(710)
Deferred policy acquisition costs and present value of future profits, annuity unlocking		41	29	35
Deferred policy acquisition costs and present value of future profits, change included in realized gains		10	8	9
Deferred policy acquisition costs and present value of future profits, sale of subsidiaries				(19)
Deferred policy acquisition costs and present value of future profits, foreign currency translation		0	(3)	(3)
Deferred policy acquisition costs and present value of future profits, other		10
Deferred policy acquisition costs and present value of future profits, change in unrealized		(157)	(31)	297
Deferred policy acquisition costs and present value of future profits, ending balance		1,216	1,239	1,184
Property and casualty insurance
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Deferred policy acquisition costs, beginning balance		238	226	221
Deferred policy acquisition costs, additions		588	535	519
Deferred policy acquisition costs, periodic amortization		(556)	(520)	(511)
Deferred policy acquisition costs, foreign currency translation		0	(3)	(3)
Deferred policy acquisition costs, ending balance		270	238	226
Annuity and Run-off Long-term Care and Life
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Deferred policy acquisition costs, beginning balance		1,110	1,018	925
Deferred policy acquisition costs, additions		225	230	224
Deferred policy acquisition costs, periodic amortization		(161)	(169)	(162)
Deferred policy acquisition costs, annuity unlocking		34	25	31
Deferred policy acquisition costs, change included in realized gains		9	6	8
Deferred policy acquisition costs, sale of subsidiaries				(8)
Deferred policy acquisition costs, ending balance		1,217	1,110	1,018
Movement in Deferred Sales Inducements [Roll Forward]
Deferred sales inducements, beginning balance		110	119	132
Deferred sales inducements, additions		4	9	11
Deferred sales inducements, periodic amortization		(19)	(24)	(26)
Deferred sales inducements, annuity unlocking		6	4	4
Deferred sales inducements, change included in realized gains		1	2	1
Deferred sales inducements, sale of subsidiaries				(3)
Deferred sales inducements, ending balance		102	110	119
Movement in Present Value of Future Insurance Profits [Roll Forward]
Present value of future profits, beginning balance		46	55	74
Present value of future profits, periodic amortization		(8)	(9)	(11)
Present value of future profits, annuity unlocking		1	0	0
Present value of future profits, sale of subsidiaries				(8)
Present value of future profits, other		10
Present value of future profits, ending balance		49	46	55
Movement in Unrealized Gains (Losses) Related to Deferred Policy Acquisition Costs and Present Value of Future Profits [Roll Forward]
Unrealized investment gains (losses), beginning balance	[1]	(265)	(234)	(531)
Unrealized investment gains (losses), change in unrealized	[1]	(157)	(31)	297
Unrealized investment gains (losses), ending balance	[1]	(422)	(265)	(234)
Movement Analysis of Deferred Policy Acquisition Costs and Present Value of Future Profits [Roll Forward]
Deferred policy acquisition costs and present value of future profits, beginning balance		1,001	958	600
Deferred policy acquisition costs and present value of future profits, additions		229	239	235
Deferred policy acquisition costs and present value of future profits, periodic amortization		(188)	(202)	(199)
Deferred policy acquisition costs and present value of future profits, annuity unlocking		41	29	35
Deferred policy acquisition costs and present value of future profits, change included in realized gains		10	8	9
Deferred policy acquisition costs and present value of future profits, sale of subsidiaries				(19)
Deferred policy acquisition costs and present value of future profits, other		10
Deferred policy acquisition costs and present value of future profits, change in unrealized		(157)	(31)	297
Deferred policy acquisition costs and present value of future profits, ending balance		946	1,001	958
Excluding Unrealized Gains | Annuity and Run-off Long-term Care and Life
Movement Analysis of Deferred Policy Acquisition Costs and Present Value of Future Profits [Roll Forward]
Deferred policy acquisition costs and present value of future profits, beginning balance		1,266	1,192	1,131
Deferred policy acquisition costs and present value of future profits, change in unrealized		0	0	0
Deferred policy acquisition costs and present value of future profits, ending balance		$ 1,368	$ 1,266	$ 1,192

[1] Unrealized adjustments to DPAC includes net unrealized gains/losses on securities and net unrealized gains/losses on cash flow hedges.

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Managed Investment Entities - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($) collateralizedloanobligation	Dec. 31, 2016 USD ($) collateralizedloanobligation	Dec. 31, 2015 USD ($) collateralizedloanobligation
Variable Interest Entity [Line Items]
Percentage of investment of most subordinate debt tranche, Minimum	15.00%
Percentage of investment of most subordinate debt tranche, Maximum	60.90%
Number of collateralized loan obligation entities | collateralizedloanobligation	15
Number of collateralized loan obligation entities formed during the period | collateralizedloanobligation	2	2	2
Face amount of managed investment entities liabilities purchased by subsidiaries after issuance date	$ 71	$ 24
Amount paid by subsidiaries to purchase managed investment entities liabilities after issuance date	71	17
Proceeds received by subsidiaries related to sales and redemptions of managed investment entities liabilities	$ 103	115
Number of collateralized loan obligation entities that were substantially liquidated during the period | collateralizedloanobligation	2
Difference between aggregate unpaid principal balance and fair value of CLOs' fixed maturity investments	$ 55	75
Difference between aggregate unpaid principal balance and fair value of CLOs' debt	118	159
Carrying amount of CLO loans in default	1	1
Aggregate unpaid principal balance of CLO loans in default	8	10
Variable interest entity, primary beneficiary
Variable Interest Entity [Line Items]
Aggregate fair value of investment in collateralized loan obligations	215	216	$ 266
New collateralized loan obligation entities
Variable Interest Entity [Line Items]
Face value of liabilities issued by managed investment entities on issuance date	865	866	869
Face amount of managed investment entities liabilities purchased by subsidiaries at issuance date	48	$ 64	$ 81
Subordinated debt obligations | Variable interest entity, primary beneficiary
Variable Interest Entity [Line Items]
Aggregate fair value of investment in collateralized loan obligations	$ 130

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Managed Investment Entities - Selected financial information related to CLOs (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Gains (losses) on change in fair value of assets/liabilities:
Assets	[1]	$ (8)	$ 131	$ (116)
Liabilities	[1]	20	(116)	82
Management fees paid to AFG		18	17	15
CLO earnings (losses) attributable to AFG Shareholders	[2]	23	37	(6)
Variable interest entity, primary beneficiary
Variable Interest Entity [Line Items]
Investment in CLO tranches		$ 215	$ 216	$ 266

[1] Included in revenues in AFG’s Statement of Earnings.

[2] Included in earnings before income taxes in AFG’s Statement of Earnings.

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Goodwill and Other Intangibles - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill decrease due to the sale of a subsidiary	$ (2)			$ (2)
Amortizable intangible assets related to property and casualty insurance acquisitions		$ 26	$ 34
Accumulated amortization		30	25
Amortization of intangible assets		$ 8	$ 8	$ 8
Weighted average useful life of finite-lived intangible assets acquired		3 years
Future amortization of intangibles in next year		$ 8
Future amortization of intangibles in year two		8
Future amortization of intangibles in year three		8
Future amortization of intangibles in year four		$ 2

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Goodwill and Other Intangibles - Changes in the carrying value of goodwill (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2014
Changes in the carrying value of goodwill by reporting segment
Goodwill, Beginning balance	$ 199	$ 199	$ 199	$ 199	$ 201
Goodwill, Sale of subsidiary	(2)	(2)
Goodwill, Ending balance	199	199
Property and Casualty
Changes in the carrying value of goodwill by reporting segment
Goodwill, Beginning balance	168	168	168	168	168
Goodwill, Sale of subsidiary		0
Goodwill, Ending balance	168	168
Annuity
Changes in the carrying value of goodwill by reporting segment
Goodwill, Beginning balance	31	31	$ 31	$ 31	$ 33
Goodwill, Sale of subsidiary		(2)
Goodwill, Ending balance	$ 31	$ 31

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Long-Term Debt - Narrative (Details) - USD ($)	1 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 11, 2017	Nov. 30, 2017	Aug. 31, 2017	Jun. 30, 2017	Nov. 10, 2016	Aug. 31, 2016	Nov. 30, 2015	Sep. 30, 2015	Jun. 30, 2015
Long-term Debt, Fiscal Year Maturity [Abstract]
Scheduled principal payments on debt in next year	$ 0	$ 0
Scheduled principal payments on debt in year two	0	0
Scheduled principal payments on debt in year three	0	0
Scheduled principal payments on debt in year four	0	0
Scheduled principal payments on debt in year five	0	0
Scheduled principal payments on debt after year five	1,320,000,000	1,320,000,000
Principal	1,318,000,000	1,318,000,000	$ 1,308,000,000
Cash interest payments on long-term debt		85,000,000	75,000,000	$ 75,000,000
AFG
Long-term Debt, Fiscal Year Maturity [Abstract]
Revolving credit line	500,000,000	500,000,000
Amount borrowed under AFG revolving credit facility	0	$ 0	0
Interest rate description of fair value hedge activity		three-month LIBOR plus 8.099%
Interest rate description for revolving credit facility		1.00% to 1.875% (currently 1.375%) over LIBOR
LIBOR | AFG
Long-term Debt, Fiscal Year Maturity [Abstract]
Interest rate on revolving debt facility		1.375%
LIBOR | AFG | Minimum
Long-term Debt, Fiscal Year Maturity [Abstract]
Interest rate on revolving debt facility		1.00%
LIBOR | AFG | Maximum
Long-term Debt, Fiscal Year Maturity [Abstract]
Interest rate on revolving debt facility		1.875%
Interest rate swaps | Fair Value Hedge | Designated as Hedging Instrument | AFG
Long-term Debt, Fiscal Year Maturity [Abstract]
Cash interest received on long-term debt affiliated with interest rate swap		$ 2,000,000	3,000,000	$ 2,000,000
Interest rate swaps | Fair Value Hedge | Designated as Hedging Instrument | LIBOR | AFG
Long-term Debt, Fiscal Year Maturity [Abstract]
Basis spread on variable interest rate					8.099%
Long-term debt | Interest rate swaps | Fair Value Hedge | Designated as Hedging Instrument | AFG
Long-term Debt, Fiscal Year Maturity [Abstract]
Net derivatives, at fair value			1,000,000
Senior Notes | AFG
Long-term Debt, Fiscal Year Maturity [Abstract]
Principal	1,018,000,000	1,018,000,000	1,008,000,000
Senior Notes | 4.50% Senior Notes due June 2047 | AFG
Long-term Debt, Fiscal Year Maturity [Abstract]
Senior Notes, aggregate principal amount						$ 240,000,000		$ 350,000,000
Senior Notes, issuance price as a percentage of par value						102.374%		99.46%
Principal	$ 590,000,000	$ 590,000,000	0
Interest rate on debt instruments	4.50%	4.50%				4.50%		4.50%
Senior Notes | 3.50% Senior Notes due August 2026 | AFG
Long-term Debt, Fiscal Year Maturity [Abstract]
Senior Notes, aggregate principal amount						$ 125,000,000				$ 300,000,000
Senior Notes, issuance price as a percentage of par value						99.698%				99.608%
Principal	$ 425,000,000	$ 425,000,000	300,000,000
Interest rate on debt instruments	3.50%	3.50%				3.50%				3.50%
Senior Notes | 9-7/8% Senior Notes due June 2019
Long-term Debt, Fiscal Year Maturity [Abstract]
Interest rate on debt instruments	9.875%	9.875%											9.875%
Senior Notes | 9-7/8% Senior Notes due June 2019 | AFG
Long-term Debt, Fiscal Year Maturity [Abstract]
Senior Notes, amount of the original debt instrument that was redeemed					$ 350,000,000
Senior Notes, amount of the original debt instrument that was redeemed plus a make-whole premium					$ 388,000,000
Principal	$ 0	$ 0	$ 350,000,000
Interest rate on debt instruments	9.875%	9.875%	9.875%		9.875%								9.875%
Senior Notes | 9-7/8% Senior Notes due June 2019 | Interest rate swaps | Fair Value Hedge | Designated as Hedging Instrument | AFG
Long-term Debt, Fiscal Year Maturity [Abstract]
Make-whole premium included in the loss on the retirement of debt	$ (1,000,000)
Senior Notes | 6-3/8% Senior Notes due June 2042 | AFG
Long-term Debt, Fiscal Year Maturity [Abstract]
Senior Notes, amount of the original debt instrument that was redeemed								$ 230,000,000
Principal	$ 0	$ 0	$ 230,000,000
Interest rate on debt instruments	6.375%	6.375%						6.375%
Senior Notes | 5-3/4% Senior Notes due August 2042 | AFG
Long-term Debt, Fiscal Year Maturity [Abstract]
Senior Notes, amount of the original debt instrument that was redeemed							$ 125,000,000
Principal	$ 0	$ 0	125,000,000
Interest rate on debt instruments	5.75%	5.75%					5.75%
Senior Notes | 7% Senior Notes due September 2050
Long-term Debt, Fiscal Year Maturity [Abstract]
Senior Notes, amount of the original debt instrument that was redeemed												$ 132,000,000
Senior Notes | 7% Senior Notes due September 2050 | AFG
Long-term Debt, Fiscal Year Maturity [Abstract]
Interest rate on debt instruments												7.00%
Subordinated Debt | AFG
Long-term Debt, Fiscal Year Maturity [Abstract]
Principal	$ 300,000,000	$ 300,000,000	300,000,000
Subordinated Debt | 6-1/4% Subordinated Debentures due September 2054 | AFG
Long-term Debt, Fiscal Year Maturity [Abstract]
Principal	$ 150,000,000	$ 150,000,000	150,000,000
Interest rate on debt instruments	6.25%	6.25%
Subordinated Debt | 6% Subordinated Debentures due November 2055 | AFG
Long-term Debt, Fiscal Year Maturity [Abstract]
Senior Notes, aggregate principal amount											$ 150,000,000
Principal	$ 150,000,000	$ 150,000,000	$ 150,000,000
Interest rate on debt instruments	6.00%	6.00%									6.00%
Revolving Credit Facility | National Interstate
Long-term Debt, Fiscal Year Maturity [Abstract]
Principal									$ 18,000,000
Revolving Credit Facility | Line of Credit | National Interstate
Long-term Debt, Fiscal Year Maturity [Abstract]
Principal									$ 6,000,000
Make-whole premium | Senior Notes | 9-7/8% Senior Notes due June 2019 | AFG
Long-term Debt, Fiscal Year Maturity [Abstract]
Make-whole premium included in the loss on the retirement of debt	$ (38,000,000)

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Long-Term Debt - Schedule of long-term debt (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Summary of Carrying value of long-term debt
Principal	$ 1,318	$ 1,308
Discount and Issue Costs	(17)	(25)
Carrying Value	1,301	1,283
AFG
Summary of Carrying value of long-term debt
Carrying Value	1,301	1,283
Senior Notes | AFG
Summary of Carrying value of long-term debt
Principal	1,018	1,008
Discount and Issue Costs	(7)	(15)
Carrying Value	1,011	993
Senior Notes | 4.50% Senior Notes due June 2047 | AFG
Summary of Carrying value of long-term debt
Principal	590	0
Discount and Issue Costs	(2)	0
Carrying Value	588	0
Senior Notes | 3.50% Senior Notes due August 2026 | AFG
Summary of Carrying value of long-term debt
Principal	425	300
Discount and Issue Costs	(5)	(3)
Carrying Value	420	297
Senior Notes | 9-7/8% Senior Notes due June 2019 | AFG
Summary of Carrying value of long-term debt
Principal	0	350
Discount and Issue Costs	0	(1)
Carrying Value	0	349
Senior Notes | 6-3/8% Senior Notes due June 2042 | AFG
Summary of Carrying value of long-term debt
Principal	0	230
Discount and Issue Costs	0	(7)
Carrying Value	0	223
Senior Notes | 5-3/4% Senior Notes due August 2042 | AFG
Summary of Carrying value of long-term debt
Principal	0	125
Discount and Issue Costs	0	(4)
Carrying Value	0	121
Senior Notes | Other | AFG
Summary of Carrying value of long-term debt
Principal	3	3
Discount and Issue Costs	0	0
Carrying Value	3	3
Subordinated Debentures | AFG
Summary of Carrying value of long-term debt
Principal	300	300
Discount and Issue Costs	(10)	(10)
Carrying Value	290	290
Subordinated Debentures | 6-1/4% Subordinated Debentures due September 2054 | AFG
Summary of Carrying value of long-term debt
Principal	150	150
Discount and Issue Costs	(5)	(5)
Carrying Value	145	145
Subordinated Debentures | 6% Subordinated Debentures due November 2055 | AFG
Summary of Carrying value of long-term debt
Principal	150	150
Discount and Issue Costs	(5)	(5)
Carrying Value	$ 145	$ 145

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Shareholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Rate of options exercisable per year, commencing one year after grant			20% per year commencing one year after grant
Duration of options expiration, after date of grant			10 years
Total intrinsic value of options exercised			$ 65	$ 38	$ 52
Cash received from the exercise of stock options			33	32	47
Tax benefit related to exercise of stock options			18	11	16
Total compensation expense related to stock incentive plans			30	28	27
Tax benefit related to compensation costs			27	19	8
Net of tax unrealized gains (losses) related to credit-only impaired securities			68	$ 52	51
Impact of the U.S. corporate tax rate change on AOCI			$ 0			$ 2
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted Common Stock vesting period			3 years
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted Common Stock vesting period			4 years
Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock reserved for issuance under stock incentive plans (shares)			8,000,000.0
Common Stock options issued under stock incentive plan (shares)			0	0
Annual Equity Bonus Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other benefit plans, shares issued (shares)	47,826	40,336
Common Stock issued, fair value per share (USD per share)	$ 96.13	$ 71.05
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to equity-based awards that have yet to vest			$ 7
Weighted average period of cost expected to be recognized			1 year 8 months 12 days
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to equity-based awards that have yet to vest			$ 31
Weighted average period of cost expected to be recognized			2 years 7 months 6 days
Capital surplus
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Tax benefit related to exercise of stock options					$ 12
Capital surplus under previous accounting guidance | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Tax benefit related to exercise of stock options			$ 17	$ 9
Accounting Standards Update 2018-02 | Tax Cuts and Jobs Act of 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Impact of the U.S. corporate tax rate change on AOCI			$ 145

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Shareholders' Equity - Preferred stock authorized for issuance (Details)	Dec. 31, 2017 $ / shares shares
Voting Preferred Stock
Class of Stock [Line Items]
Preferred Stock, par value | $ / shares	$ 0
Preferred Stock, shares authorized | shares	12,500,000.0
Nonvoting Preferred Stock
Class of Stock [Line Items]
Preferred Stock, par value | $ / shares	$ 0
Preferred Stock, shares authorized | shares	12,500,000.0

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Shareholders' Equity - Data relating to grants of restricted stock (Details) - Restricted Stock	12 Months Ended
	Dec. 31, 2017 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding at January 1, 2017 | shares	678,875
Granted | shares	232,250
Vested | shares	(145,473)
Forfeited | shares	(6,617)
Outstanding at December 31, 2017 | shares	759,035
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Average grant date fair value, Outstanding, Beginning balance | $ / shares	$ 60.90
Average grant date fair value, Granted | $ / shares	94.44
Average grant date fair value, Vested | $ / shares	48.76
Average grant date fair value, Forfeited | $ / shares	71.30
Average grant date fair value, Outstanding, Ending balance | $ / shares	$ 73.40

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Shareholders' Equity - Data for stock options issued under the stock incentive plans (Details) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding at January 1, 2017 | shares	4,505,101
Exercised | shares	(1,020,986)
Forfeited/Cancelled | shares	(16,775)
Outstanding at December 31, 2017 | shares	3,467,340
Options exercisable at December 31, 2017 | shares	2,589,277
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Average exercise price, Beginning balance | $ / shares	$ 43.02
Average exercise price, Exercised | $ / shares	33.38
Average exercise price, Forfeited/Cancelled | $ / shares	55.82
Average exercise price, Ending balance | $ / shares	45.80
Average exercise price, Options exercisable | $ / shares	$ 42.00
Average remaining contractual term, Options outstanding	4 years 10 months 24 days
Average remaining contractual term, Options exercisable	4 years 4 months 24 days
Aggregate intrinsic value, Options outstanding | $	$ 218
Aggregate intrinsic value, Options exercisable | $	$ 172

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Shareholders' Equity - Assumptions used in estimating weighted average fair value of options on grant date (Details)	12 Months Ended
	Dec. 31, 2015 $ / shares
Stock Options, Valuation Assumptions
Exercise price	$ 63.15
Expected dividend yield	1.60%
Expected volatility	25.00%
Expected term (in years)	7 years 3 months
Risk-free rate	1.88%
Grant date fair value	$ 15.29

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Shareholders' Equity - Progression of the components of accumulated other comprehensive income (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017		Dec. 31, 2016		Dec. 31, 2015
Accumulated Other Comprehensive Income [Roll Forward]
AOCI beginning balance		$ 375
Other comprehensive income (loss), net of tax		296		$ 67		$ (431)
Other comprehensive income (loss), net of tax, acquisition of noncontrolling interest				(315)
AOCI ending balance		813		375
Accumulated net investment gain (loss) including portion attributable to noncontrolling interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), unrealized holding gains on securities arising during the period, Pretax		456		124		(625)
Other comprehensive income (loss), unrealized holding gains on securities arising during the period, tax		(159)		(44)		219
Other comprehensive income (loss), unrealized holding gains on securities arising during the period, net of tax		297		80		(406)
Reclassification from accumulated other comprehensive income, pretax	[1]	(15)		(19)		14
Reclassification from accumulated other comprehensive income, tax	[1]	5		7		(5)
Reclassification from accumulated other comprehensive income, net of tax		(10)		(12)		9
Accumulated Other Comprehensive Income [Roll Forward]
Other comprehensive income (loss), pretax		441		105		(645)
Other comprehensive income (loss), tax		(154)		(37)		226
Other comprehensive income (loss), net of tax		287		68		(419)
Accumulated net investment gain (loss) including portion attributable to noncontrolling interest | Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from accumulated other comprehensive income, pretax						(34)
Reclassification from accumulated other comprehensive income, tax						12
Reclassification from accumulated other comprehensive income, net of tax						(22)
Accumulated net investment gain (loss) attributable to noncontrolling interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), unrealized holding gains on securities arising during the period, net of tax		0		(4)		9
Reclassification from accumulated other comprehensive income, net of tax	[1]	0		(1)		(1)
Accumulated Other Comprehensive Income [Roll Forward]
Other comprehensive income (loss), net of tax		0		(5)		8
Accumulated net investment gain (loss) attributable to noncontrolling interest | Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from accumulated other comprehensive income, net of tax						0
Accumulated net investment gain (loss) attributable to parent
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), unrealized holding gains on securities arising during the period, net of tax		297		76		(397)
Reclassification from accumulated other comprehensive income, net of tax		(10)		(13)		8
Accumulated Other Comprehensive Income [Roll Forward]
AOCI beginning balance		404	[2]	332	[2]	743
Other comprehensive income (loss), net of tax		287		63		(411)
AOCI, Other, including the impact of the Tax Cuts and Jobs Act of 2017 and the sale of redeemable noncontrolling interests in subsidiaries	[3]	149
Other comprehensive income (loss), net of tax, acquisition of noncontrolling interest	[3]			9
AOCI ending balance	[2]	840		404		332
Accumulated net investment gain (loss) attributable to parent | Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from accumulated other comprehensive income, net of tax						(22)
Accumulated net gain (loss) from cash flow hedges including portion attributable to noncontrolling interest
Accumulated Other Comprehensive Income [Roll Forward]
Other comprehensive income (loss), pretax		(6)		(12)		1
Other comprehensive income (loss), tax		2		4		0
Other comprehensive income (loss), net of tax		(4)		(8)		1
Accumulated net gain (loss) from cash flow hedges attributable to noncontrolling interest
Accumulated Other Comprehensive Income [Roll Forward]
Other comprehensive income (loss), net of tax		0		0		0
Accumulated net gain (loss) from cash flow hedges attributable to parent
Accumulated Other Comprehensive Income [Roll Forward]
AOCI beginning balance		(7)		1		0
Other comprehensive income (loss), net of tax		(4)		(8)		1
AOCI, Other, including the impact of the Tax Cuts and Jobs Act of 2017 and the sale of redeemable noncontrolling interests in subsidiaries	[3]	(2)
AOCI ending balance		(13)		(7)		1
Accumulated foreign currency adjustment including portion attributable to noncontrolling interest
Accumulated Other Comprehensive Income [Roll Forward]
Other comprehensive income (loss), pretax		9		6		(9)
Other comprehensive income (loss), tax		3		1		(5)
Other comprehensive income (loss), net of tax		12		7		(14)
Accumulated foreign currency adjustment attributable to noncontrolling interest
Accumulated Other Comprehensive Income [Roll Forward]
Other comprehensive income (loss), net of tax		0		0		0
Accumulated foreign currency adjustment attributable to parent
Accumulated Other Comprehensive Income [Roll Forward]
AOCI beginning balance		(15)		(22)		(8)
Other comprehensive income (loss), net of tax		12		7		(14)
AOCI, Other, including the impact of the Tax Cuts and Jobs Act of 2017 and the sale of redeemable noncontrolling interests in subsidiaries	[3]	(3)
AOCI ending balance		(6)		(15)		(22)
Accumulated defined benefit plans adjustment including portion attributable to noncontrolling interest
Accumulated Other Comprehensive Income [Roll Forward]
Other comprehensive income (loss), pretax		1		0		1
Other comprehensive income (loss), tax		0		0		0
Other comprehensive income (loss), net of tax		1		0		1
Accumulated defined benefit plans adjustment attributable to noncontrolling interest
Accumulated Other Comprehensive Income [Roll Forward]
Other comprehensive income (loss), net of tax		0		0		0
Accumulated defined benefit plans adjustment attributable to parent
Accumulated Other Comprehensive Income [Roll Forward]
AOCI beginning balance		(7)		(7)		(8)
Other comprehensive income (loss), net of tax		1		0		1
AOCI, Other, including the impact of the Tax Cuts and Jobs Act of 2017 and the sale of redeemable noncontrolling interests in subsidiaries	[3]	(2)
AOCI ending balance		(8)		(7)		(7)
AOCI including portion attributable to noncontrolling interest
Accumulated Other Comprehensive Income [Roll Forward]
Other comprehensive income (loss), pretax		445		99		(652)
Other comprehensive income (loss), tax		(149)		(32)		221
Other comprehensive income (loss), net of tax		296		67		(431)
AOCI attributable to noncontrolling interest
Accumulated Other Comprehensive Income [Roll Forward]
Other comprehensive income (loss), net of tax		0		(5)		8
AOCI attributable to parent
Accumulated Other Comprehensive Income [Roll Forward]
AOCI beginning balance		375		304		727
Other comprehensive income (loss), net of tax		296		62		(423)
AOCI, Other, including the impact of the Tax Cuts and Jobs Act of 2017 and the sale of redeemable noncontrolling interests in subsidiaries	[3]	142
Other comprehensive income (loss), net of tax, acquisition of noncontrolling interest	[3]			9
AOCI ending balance		$ 813		$ 375		$ 304

[1] The reclassification adjustment out of net unrealized gains on securities affected the following lines in AFG’s Statement of Earnings: OCI component Affected line in the statement of earnings Pretax Realized gains (losses) on securities Tax Provision for income taxes Attributable to noncontrolling interests Net earnings attributable to noncontrolling interests

[2] Includes net unrealized gains of $68 million at December 31, 2017 compared to net unrealized gains of $52 million and $51 million at December 31, 2016 and 2015, related to securities for which only the credit portion of an other-than-temporary impairment has been recorded in earnings.

[3] Other includes the December 2017 reclassification of $145 million stranded in AOCI from accounting for the Tax Cuts and Jobs Act of 2017 to retained earnings (see Note A — “Accounting Policies — Income Taxes”), and the impact on AOCI of the December 2017 sale of redeemable noncontrolling interests in Neon and the November 2016 acquisition of the noncontrolling interest in NATL (see Note B — “Acquisitions and Sale of Businesses”).

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Income Taxes - Narrative (Details) £ in Millions, $ in Millions			1 Months Ended	3 Months Ended			12 Months Ended
		Jan. 01, 2018	Jan. 31, 2008 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Jun. 30, 2016 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2017 GBP (£)
Income Tax Reconciliation [Line Items]
Statutory rate of income taxes							35.00%	35.00%	35.00%
Payments to acquire additional interest in subsidiaries							$ 0	$ 315	$ 0
impact of foreign operations included in the provision for income taxes							21	5	3
Decrease in the valuation allowance related to the change in the U.S. corporate tax rate							(7)	52	23
Income tax expense (benefit)							247	119	195
Decrease in net deferred tax assets resulting from the changes in the Tax Cuts and Jobs Act of 2017							$ 83	$ 0	0
Effective tax rate excluding the charge related to the exit of certain lines of business within subsidiaries and impact of the change in the U.S. corporate tax rate							31.00%
Effective tax rate excluding the charge related to the exit of certain lines of business within subsidiaries, acquisition of the noncontrolling interest, and restructuring of subsidiaries								35.00%
Income (losses) subject to tax in foreign jurisdictions							$ (58)	$ (160)	(66)
Operating loss carryforwards, valuation allowance				$ 27			27
Decrease in AFG's liability for uncertain tax positions, settlements							(1)	0	0
Change in AFG's liability for uncertain tax positions of prior year							0	0	0
Cash payments for income taxes							$ 194	308	234
Limitation on the use of tax credit carryforwards							A SRLY NOL can be used only by the entity that created it and only in years that both it and the consolidated group have taxable income. Approximately $13 million of AFG’s SRLY NOLs expired unutilized at December 31, 2017.
AFG
Income Tax Reconciliation [Line Items]
Income tax expense (benefit)				(56)	$ (177)		$ 247	119	195
Amount of expense for penalties related to a tax position									0
National Interstate
Income Tax Reconciliation [Line Items]
Income tax expense (benefit)					(66)
Neon Capital Limited
Income Tax Reconciliation [Line Items]
Income tax expense (benefit)				(56)	(111)			(48)
Increase (Decrease) in current taxes payable				(20)	(29)
Charge for valuation allowance
Income Tax Reconciliation [Line Items]
Charge for valuation allowance against deferred tax assets							80
Maximum | AFG
Income Tax Reconciliation [Line Items]
Unrecognized tax benefits that would impact the effective tax rate				1	1		1	1
Interest included in tax provision							(1)	1	1
Decrease in related accrued interest (are less than in 2017 and 2016)				1	1		1	1
Amount of expense for penalties related to a tax position							1	1
Income tax penalties accrued				1	$ 1		1	1
Amount Unutilized [Member]
Income Tax Reconciliation [Line Items]
Operating loss carryforwards				13			13
Tax Cuts and Jobs Act of 2017
Income Tax Reconciliation [Line Items]
Decrease in net deferred tax assets resulting from the changes in the Tax Cuts and Jobs Act of 2017							83
Tax Cuts and Jobs Act of 2017 | Neon Capital Limited
Income Tax Reconciliation [Line Items]
Decrease in the valuation allowance related to the change in the U.S. corporate tax rate							(61)
United Kingdom
Income Tax Reconciliation [Line Items]
Operating loss carryforwards	[1]			$ 252			252				£ 186
Property and casualty insurance
Income Tax Reconciliation [Line Items]
Change in AFG’s liability for uncertain tax positions due to the uncertainty in state taxation									$ 1
Tax payments due to resolved uncertainty in state taxation							1
Property and casualty insurance | Other lines
Income Tax Reconciliation [Line Items]
Special charges related to the exit of certain lines of business within subsidiaries						$ 65		65
Property and casualty insurance | Other lines | Neon Capital Limited
Income Tax Reconciliation [Line Items]
Special charges related to the exit of certain lines of business within subsidiaries								$ 65
Neon Capital Limited
Income Tax Reconciliation [Line Items]
Payments to acquire controlling interest in subsidiaries			$ 75
Percentage ownership of subsidiary			67.00%
Payments to acquire additional interest in subsidiaries										$ 17
Subsequent Event | Tax Cuts and Jobs Act of 2017
Income Tax Reconciliation [Line Items]
Statutory rate of income taxes		21.00%
Foreign underwriting losses
Income Tax Reconciliation [Line Items]
impact of foreign operations included in the provision for income taxes							$ 14

[1] £186 million

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Income Taxes - Reconciliation of income taxes at the statutory rate to the provision for income taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Earnings before income taxes (“EBT”)	$ 724	$ 787	$ 565
Income taxes at statutory rate	253	275	198
Effect of tax exempt interest	(23)	(24)	(27)
Effect of dividends received deduction	(8)	(7)	(8)
Effect of stock-based compensation	(16)	(9)	1
Effect of employee stock ownership plan dividend paid deduction	(5)	(2)	(1)
Effect of foreign operations	21	5	3
Effect of change in valuation allowance (excluding change in tax rate)	(7)	52	23
Effect of subsidiaries not in AFG's tax return	0	3	2
Effect of Neon restructuring	(56)	(111)	0
Effect of change in U.S corporate tax rate	83	0	0
Effect of acquisition of noncontrolling interest	0	(66)	0
Effect of other income tax reconciliation	5	3	4
Provision for income taxes as shown in the Statement of Earnings	$ 247	$ 119	$ 195
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Income taxes at statutory rate as a percentage of EBT	35.00%	35.00%	35.00%
Effect of tax exempt interest as a percentage of EBT	(3.00%)	(3.00%)	(5.00%)
Effect of dividend received deduction as a percentage of EBT	(1.00%)	(1.00%)	(1.00%)
Effect of stock-based compensation as a percentage of EBT	(2.00%)	(1.00%)	0.00%
Effect of employee stock ownership plan dividend paid deduction as a percentage of EBT	(1.00%)	(0.00%)	(0.00%)
Effect of foreign operations as a percentage of EBT	3.00%	0.00%	1.00%
Effect of change in valuation allowance (excluding change in tax rate) as a percentage of EBT	(1.00%)	7.00%	4.00%
Effect of subsidiaries not in AFG's tax return as a percentage of EBT	0.00%	0.00%	0.00%
Effect of Neon restructuring as a percentage of EBT	(8.00%)	(14.00%)	0.00%
Effect of change in U.S corporate tax rate as a percentage of EBT	11.00%	0.00%	0.00%
Effect of acquisition of noncontrolling interest as a percentage of EBT	0.00%	(8.00%)	0.00%
Effect of other income tax reconciliation as a percentage of EBT	1.00%	0.00%	1.00%
Provision for income taxes as shown in the Statement of Earnings as a percentage of EBT	34.00%	15.00%	35.00%

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Income Taxes - Total income tax provision (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current taxes:
Federal	$ 153	$ 299	$ 216
State	6	12	8
Deferred taxes:
Federal	5	(192)	(29)
Impact of change in U.S. corporate tax rate	83	0	0
Total Federal deferred taxes	88	(192)	(29)
Provision for income taxes as shown in the Statement of Earnings	$ 247	$ 119	$ 195

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Income Taxes - Operating and capital loss carryforwards available (Details) - Dec. 31, 2017 £ in Millions, $ in Millions		USD ($)	GBP (£)
U.S. | Expiring 2018 - 2022
Operating and capital loss carryforwards [Line Items]
Operating loss carryforwards		$ 130
U.S. | Capital loss carryforward | Expiring 2022
Operating and capital loss carryforwards [Line Items]
Capital loss carryforwards		109
United Kingdom
Operating and capital loss carryforwards [Line Items]
Operating loss carryforwards	[1]	$ 252	£ 186

[1] £186 million

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Income Taxes - Significant components of deferred tax assets and liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Deferred tax assets:
Federal net operating loss carryforwards	$ 27	$ 50
Foreign underwriting losses	80	120
Capital loss carryforwards	32	83
Insurance claims and reserves	694	801
Employee benefits	84	131
Other, net	45	80
Total deferred tax assets before valuation allowance	962	1,265
Valuation allowance against deferred tax assets	(109)	(173)
Total deferred tax assets	853	1,092
Deferred tax liabilities:
Investment securities	(341)	(307)
Deferred policy acquisition costs	(202)	(352)
Insurance claims and reserves transition liability	(128)	0
Real estate, property and equipment	(35)	(45)
Total deferred tax liabilities	(706)	(704)
Net deferred tax asset (liability)	147	388
Excluding Unrealized Gains
Deferred tax assets:
Federal net operating loss carryforwards	27	50
Foreign underwriting losses	80	120
Capital loss carryforwards	32	83
Insurance claims and reserves	665	774
Employee benefits	84	131
Other, net	48	85
Total deferred tax assets before valuation allowance	936	1,243
Valuation allowance against deferred tax assets	(109)	(173)
Total deferred tax assets	827	1,070
Deferred tax liabilities:
Investment securities	(1)	29
Deferred policy acquisition costs	(293)	(448)
Insurance claims and reserves transition liability	(128)	0
Real estate, property and equipment	(35)	(45)
Total deferred tax liabilities	(457)	(464)
Net deferred tax asset (liability)	370	606
Impact of Unrealized Gains
Deferred tax assets:
Federal net operating loss carryforwards	0	0
Foreign underwriting losses	0	0
Capital loss carryforwards	0	0
Insurance claims and reserves	29	27
Employee benefits	0	0
Other, net	(3)	(5)
Total deferred tax assets before valuation allowance	26	22
Valuation allowance against deferred tax assets	0	0
Total deferred tax assets	26	22
Deferred tax liabilities:
Investment securities	(340)	(336)
Deferred policy acquisition costs	91	96
Insurance claims and reserves transition liability	0	0
Real estate, property and equipment	0	0
Total deferred tax liabilities	(249)	(240)
Net deferred tax asset (liability)	$ (223)	$ (218)

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Income Taxes - Progression of the liability for uncertain tax positions, excluding interest and penalties (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Progression of the liability for uncertain tax positions, excluding interest and penalties
Balance at January 1	$ 1	$ 1	$ 0
Additions for tax positions of prior years	0	0	1
Reductions for tax positions of prior years	0	0	0
Additions for tax positions of current year	0	0	0
Settlements	(1)	0	0
Balance at December 31	$ 0	$ 1	$ 1

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Contingencies - Narrative (Details) - USD ($) $ in Millions		3 Months Ended
	Dec. 24, 2015	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Loss Contingencies [Line Items]
Reinsurance recoverables on asbestos and environmental reserves, net of allowance					$ 2,957	$ 2,302	$ 2,201	$ 2,227
Property and Casualty Group
Loss Contingencies [Line Items]
Increase in asbestos and environmental reserves		$ 89	$ 36	$ 67
Liability for asbestos and environmental reserves					528
Former railroad and manufacturing operations
Loss Contingencies [Line Items]
Increase in asbestos and environmental reserves		$ 24	$ 5	$ 12
American Premier and its subsidiaries
Loss Contingencies [Line Items]
Liability for environmental and other claims					81
GAFRI
Loss Contingencies [Line Items]
Liability for environmental and other claims					8
Run-off long-term care insurance business
Loss Contingencies [Line Items]
Contingent capital support agreement term	5 years
A&E reserves | Property and Casualty Group
Loss Contingencies [Line Items]
Reinsurance recoverables on asbestos and environmental reserves, net of allowance					$ 125

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Quarterly Operating Results (Unaudited) - Narrative (Details) - USD ($) $ in Millions	3 Months Ended							12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Quarterly Operating Results (Unaudited) [Line Items]
Pretax catastrophe losses		$ 107						$ 140	$ 55
Income tax expense (benefit)								247	119	$ 195
Property and casualty insurance | Other lines
Quarterly Operating Results (Unaudited) [Line Items]
Special charges to increase asbestos and environmental reserves		89				$ 36		89	36	67
Favorable reserve development related to certain lines of business within subsidiaries in connection with a reinsurance to close agreement								18
Special charges related to the exit of certain lines of business within subsidiaries							$ 65		65
Property and casualty insurance | Other lines | Increased insurance loss reserves related to medical malpractice and general liability lines
Quarterly Operating Results (Unaudited) [Line Items]
Special charges related to the exit of certain lines of business within subsidiaries							57
Other
Quarterly Operating Results (Unaudited) [Line Items]
Special charges to increase asbestos and environmental reserves								24	5	12
Write off of deferred debt issuance cost due to the retirement of debt		4	$ 7							4
Make-whole premium, settlement of interest rate swap and write off of deferred debt issuance cost included in the loss on the retirement of debt	$ 40							51
Other | Former railroad and manufacturing operations
Quarterly Operating Results (Unaudited) [Line Items]
Special charges to increase asbestos and environmental reserves		$ 24				$ 5
Neon Capital Limited
Quarterly Operating Results (Unaudited) [Line Items]
Income tax expense (benefit)	(56)				$ (111)				(48)
Neon Capital Limited | Property and casualty insurance
Quarterly Operating Results (Unaudited) [Line Items]
Favorable reserve development related to certain lines of business within subsidiaries in connection with a reinsurance to close agreement	42
Neon Capital Limited | Property and casualty insurance | Other lines
Quarterly Operating Results (Unaudited) [Line Items]
Favorable reserve development related to certain lines of business within subsidiaries in connection with a reinsurance to close agreement	18
Special charges related to the exit of certain lines of business within subsidiaries									65
Neon Capital Limited | Neon Capital Limited | Current lines
Quarterly Operating Results (Unaudited) [Line Items]
Favorable reserve development related to certain lines of business within subsidiaries in connection with a reinsurance to close agreement	24
AFG
Quarterly Operating Results (Unaudited) [Line Items]
Income tax expense (benefit)	$ (56)				$ (177)			$ 247	119	195
Real estate investment | Property and casualty insurance
Quarterly Operating Results (Unaudited) [Line Items]
Pretax income from the sale of real estate properties included in other income				$ 13			$ 32		$ 32	$ 66

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Quarterly Operating Results (Unaudited) - Quarterly results of consolidated operations (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Condensed Statement of Earnings
Revenues	$ 1,808	$ 1,835	$ 1,646	$ 1,576	$ 1,737	$ 1,705	$ 1,581	$ 1,475	$ 6,865	$ 6,498	$ 6,145
Net earnings, including noncontrolling interests	166	11	145	155	388	113	63	104	477	668	370
Net earnings attributable to shareholders	$ 166	$ 11	$ 145	$ 153	$ 385	$ 109	$ 54	$ 101	$ 475	$ 649	$ 352
Earnings Attributable to Shareholders per Common Share:
Basic (USD per share)	$ 1.88	$ 0.13	$ 1.64	$ 1.76	$ 4.43	$ 1.25	$ 0.63	$ 1.16	$ 5.40	$ 7.47	$ 4.02
Diluted (USD per share)	$ 1.84	$ 0.13	$ 1.61	$ 1.72	$ 4.33	$ 1.23	$ 0.62	$ 1.14	$ 5.28	$ 7.33	$ 3.94
Average number of Common Shares:
Basic (shares)	88.2	88.1	87.8	87.2	86.9	86.9	86.8	86.9	87.8	86.9	87.6
Diluted (shares)	90.1	90.0	89.8	89.3	88.8	88.5	88.4	88.5	89.8	88.5	89.4

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Quarterly Operating Results (Unaudited) - Realized gains, favorable (adverse) prior year development of the liability for losses and LAE and the impact of derivatives related to Fixed-indexed annuities (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Realized gains (losses) and favorable (adverse) development on unpaid loss and loss adjustment expenses
Realized Gains (Losses) on Securities and Subsidiaries	$ 6	$ (12)	$ 8	$ 3	$ 51	$ 2	$ (14)	$ (18)	$ 5	$ 21
Prior Year Development Favorable (Adverse)	66	(52)	22	28	(10)	(22)	(28)	28	64	(32)
Impact of derivatives related to FIAs	$ (11)	$ (4)	$ (16)	$ (2)	$ 29	$ 1	$ (26)	$ (31)	$ (33)	$ (27)

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Insurance - Narrative (Details) - USD ($) $ in Millions	3 Months Ended				12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Insurance [Line Items]
Carrying value of cash and securities owned by U.S.-based insurance subsidiaries on deposit	$ 1,080				$ 1,080
Carrying value of cash and securities owned by insurance subsidiaries on deposit in support of underwriting activities at Lloyd's	205				205
Undrawn letters of credit	447				447
Undrawn letters of credit, collateralized	0				$ 0
Workers' compensation insurance discount rate					4.50%	4.50%
Workers' compensation insurance discount, which has reduced the liability for unpaid losses and loss adjustment expenses	15				$ 15	$ 16
Long-term care insurance reserves, net of reinsurance recoverables	39				39	37
Investment in Federal Home Loan Bank capital stock	44				44
Repayments under funding agreements with the Federal Home Loan Bank	64
Advances from Federal Home Loan Bank	871				$ 871
Description of variable rate basis					LIBOR
Repayments of advances from Federal Home Loan Bank due in next twelve months	285				$ 285
Repayments of advances from Federal Home Loan Bank due in year three	586				586
Fair value of fixed maturity investments held as collateral by the Federal Home Loan Bank	1,040				1,040
Interest on advances from Federal Home Loan Bank					14	8	$ 3
Maximum amount of dividends available to be paid by insurance subsidiaries to AFG without prior approval of regulatory authorities	826				826
Dividends on Common Stock					(421)	(187)	(178)
Aggregate guaranteed minimum death benefit value on variable annuity polices in force	15				15	20
Minimum
Insurance [Line Items]
Dividends payments without violating the most restrictive debt covenants, minimum	1,000				$ 1,000
Minimum | LIBOR
Insurance [Line Items]
FHLB advances, basis spread on variable rate					0.03%
Maximum | LIBOR
Insurance [Line Items]
FHLB advances, basis spread on variable rate					0.35%
Average | LIBOR
Insurance [Line Items]
FHLB advances, basis spread on variable rate					1.75%
FHLB, advances, refinanced terms
Insurance [Line Items]
Advances from Federal Home Loan Bank	831				$ 831
Catastrophe Bonds
Insurance [Line Items]
Catastrophe reinsurance coverage, excess retention percentage					95.00%
Catastrophe reinsurance coverage, excess retention amount					$ 200
Catastrophe reinsurance coverage, retention amount					100
Catastrophe reinsurance coverage, annual cost					11
Life insurance
Insurance [Line Items]
Life insurance in force, ceded premiums	8,320				8,320	10,220
Life insurance in force, direct premiums	12,050				12,050	13,490
Life written premiums ceded					28	31	40
Reinsurance recoveries					35	41	50
Variable annuities | Maximum
Insurance [Line Items]
Death benefits paid in excess of the variable annuity account balances (are less than in 2014, 2015 and 2016)					1	1	1
Property and casualty insurance | Other lines
Insurance [Line Items]
Favorable reserve development related to certain lines of business within subsidiaries in connection with a reinsurance to close agreement					18
Special charges to increase asbestos and environmental reserves		$ 89	$ 36		$ 89	36	$ 67
Special charges related to the exit of certain lines of business within subsidiaries				$ 65		65
Property and casualty insurance | Other lines | Increased insurance loss reserves related to medical malpractice and general liability lines
Insurance [Line Items]
Special charges related to the exit of certain lines of business within subsidiaries				$ 57
Neon Capital Limited | Property and casualty insurance
Insurance [Line Items]
Favorable reserve development related to certain lines of business within subsidiaries in connection with a reinsurance to close agreement	42
Neon Capital Limited | Property and casualty insurance | Other lines
Insurance [Line Items]
Favorable reserve development related to certain lines of business within subsidiaries in connection with a reinsurance to close agreement	18
Special charges related to the exit of certain lines of business within subsidiaries						$ 65
Neon Capital Limited | Property and casualty insurance | Other lines | Reinsurance to close agreement
Insurance [Line Items]
Favorable reserve development related to certain lines of business within subsidiaries in connection with a reinsurance to close agreement	18
Neon Capital Limited | Neon Capital Limited | Current lines
Insurance [Line Items]
Favorable reserve development related to certain lines of business within subsidiaries in connection with a reinsurance to close agreement	$ 24

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Insurance - Analysis of changes in the liability for losses and loss adjustment expenses, net of reinsurance (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016		Dec. 31, 2015
Analysis of changes in the liability for losses and loss adjustment expenses, net of reinsurance
Balance at beginning of period				$ 8,563				$ 8,127	$ 8,563	$ 8,127		$ 7,872
Less reinsurance recoverables, net of allowance				2,302				2,201	2,302	2,201		2,227
Net liability at beginning of period				6,261				5,926	6,261	5,926		5,645
Liability for losses and loss adjustment expenses, period increase (decrease) [Abstract]
Provision for losses and LAE occurring in the current year									3,019	2,730		2,662
Net increase (decrease) in the provision for claims of prior years:
Provision for claims of prior years related to special A&E charges, Neon exited lines development and other	$ (66)	$ 52	$ (22)	$ (28)	$ 10	$ 22	$ 28	$ (28)	(64)	32
Total losses and LAE incurred									2,955	2,762		2,695
Payments for losses and LAE of:
Current year									(942)	(841)		(828)
Prior years									(1,586)	(1,512)		(1,575)
Total payments									(2,528)	(2,353)		(2,403)
Reserves of businesses acquired									0	(40)	[1]	0
Foreign currency translation and other									33	(34)		(11)
Net liability at end of period	6,721				6,261				6,721	6,261		5,926
Add back reinsurance recoverables, net of allowance	2,957				2,302				2,957	2,302		2,201
Gross unpaid losses and LAE included in the balance sheet	$ 9,678				$ 8,563				9,678	8,563		8,127
Special A&E charges
Net increase (decrease) in the provision for claims of prior years:
Provision for claims of prior years related to special A&E charges, Neon exited lines development and other									89	36		67
Neon exited lines charge
Net increase (decrease) in the provision for claims of prior years:
Provision for claims of prior years related to special A&E charges, Neon exited lines development and other									(18)	57		0
Other
Net increase (decrease) in the provision for claims of prior years:
Provision for claims of prior years related to special A&E charges, Neon exited lines development and other									$ (135)	$ (61)		$ (34)

[1] Reflects the 2016 reinsurance to close transactions at Neon (discussed below).

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Insurance - Reconciliation of incurred and paid claims development information to the aggregate carrying amount of the liability for unpaid losses and LAE (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Total reserves, net of reinsurance	$ 6,721	$ 6,261	$ 5,926	$ 5,645
Add back reinsurance recoverables, net of allowance	(2,957)	(2,302)	(2,201)	(2,227)
Gross unpaid losses and LAE included in the balance sheet	9,678	$ 8,563	$ 8,127	$ 7,872
Property and casualty insurance
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Specialty unpaid losses and LAE, net of reinsurance	5,198
Other unpaid losses and LAE, net of reinsurance	1,523
Unallocated LAE	326
Total reserves, net of reinsurance	6,721
Add back reinsurance recoverables, net of allowance	2,957
Gross unpaid losses and LAE included in the balance sheet	9,678
Property and casualty insurance | Reserves for foreign operations:
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Other unpaid losses and LAE, net of reinsurance	269
Property and casualty insurance | A&E reserves
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Other unpaid losses and LAE, net of reinsurance	403
Property and casualty insurance | Other
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Other unpaid losses and LAE, net of reinsurance	45
Property and casualty insurance | Property and transportation
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Specialty unpaid losses and LAE, net of reinsurance	1,069
Property and casualty insurance | Specialty casualty
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Specialty unpaid losses and LAE, net of reinsurance	3,630
Property and casualty insurance | Specialty financial
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Specialty unpaid losses and LAE, net of reinsurance	221
Property and casualty insurance | Other specialty
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Specialty unpaid losses and LAE, net of reinsurance	278
Neon Capital Limited | Property and casualty insurance | Reserves for foreign operations:
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Other unpaid losses and LAE, net of reinsurance	$ 480

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Insurance - Short-duration insurance contracts, claims development (Details) - Property and casualty insurance $ in Millions		Dec. 31, 2017 USD ($) claim	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2010 USD ($)	Dec. 31, 2009 USD ($)	Dec. 31, 2008 USD ($)
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 19,503
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		14,838
Unpaid losses and LAE — 11th year and prior (excluding unallocated LAE)		533
Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)		5,198
Accident Year 2008
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		1,950	$ 1,951	$ 1,947	$ 1,953	$ 1,955	$ 1,978	$ 1,971	$ 1,987	$ 2,018	$ 2,067
Total IBNR Plus Expected Development on Reported Claims		$ 46
Cumulative Number of Reported Claims | claim		244,447
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 1,866	1,847	1,828	1,803	1,765	1,701	1,607	1,459	1,230	627
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[1]	95.70%
Accident Year 2009
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 1,529	1,539	1,543	1,545	1,552	1,566	1,596	1,607	1,624
Total IBNR Plus Expected Development on Reported Claims		$ 58
Cumulative Number of Reported Claims | claim		221,165
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 1,435	1,424	1,404	1,370	1,308	1,216	1,079	871	509
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[1]	93.90%
Accident Year 2010
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 1,690	1,698	1,698	1,710	1,690	1,705	1,710	1,724
Total IBNR Plus Expected Development on Reported Claims		$ 75
Cumulative Number of Reported Claims | claim		215,418
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 1,580	1,562	1,536	1,485	1,387	1,220	1,005	576
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[1]	93.50%
Accident Year 2011
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 1,859	1,866	1,861	1,871	1,849	1,848	1,840
Total IBNR Plus Expected Development on Reported Claims		$ 98
Cumulative Number of Reported Claims | claim		207,643
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 1,711	1,682	1,629	1,534	1,389	1,181	609
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[1]	92.00%
Accident Year 2012
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 1,941	1,955	1,947	1,946	1,952	1,970
Total IBNR Plus Expected Development on Reported Claims		$ 142
Cumulative Number of Reported Claims | claim		217,516
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 1,735	1,675	1,579	1,418	1,214	824
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[1]	89.40%
Accident Year 2013
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 2,000	1,996	2,000	2,011	2,036
Total IBNR Plus Expected Development on Reported Claims		$ 168
Cumulative Number of Reported Claims | claim		219,940
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 1,714	1,617	1,443	1,214	697
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[1]	85.70%
Accident Year 2014
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 2,038	2,040	2,050	2,083
Total IBNR Plus Expected Development on Reported Claims		$ 272
Cumulative Number of Reported Claims | claim		218,032
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 1,588	1,422	1,173	594
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[1]	77.90%
Accident Year 2015
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 2,040	2,046	2,114
Total IBNR Plus Expected Development on Reported Claims		$ 363
Cumulative Number of Reported Claims | claim		225,000
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 1,403	1,128	619
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[1]	68.80%
Accident Year 2016
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 2,082	2,116
Total IBNR Plus Expected Development on Reported Claims		$ 593
Cumulative Number of Reported Claims | claim		216,248
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 1,098	576
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[1]	52.70%
Accident Year 2017
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 2,374
Total IBNR Plus Expected Development on Reported Claims		$ 1,119
Cumulative Number of Reported Claims | claim		210,970
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 708
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[1]	29.80%
Excludes short-duration insurance contracts detail for accident years not separately presented
Claims Development [Line Items]
Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)		$ 4,665
Property and transportation
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		8,029
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		6,980
Unpaid losses and LAE — 11th year and prior (excluding unallocated LAE)		20
Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)		1,069
Property and transportation | Accident Year 2008
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		854	854	856	855	854	856	853	852	871	923
Total IBNR Plus Expected Development on Reported Claims		$ 1
Cumulative Number of Reported Claims | claim		157,164
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 848	847	846	846	835	824	799	761	706	352
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[2]	99.30%
Property and transportation | Accident Year 2009
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 508	508	508	511	511	516	523	506	526
Total IBNR Plus Expected Development on Reported Claims		$ 3
Cumulative Number of Reported Claims | claim		140,532
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 502	499	497	493	479	456	413	348	229
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[2]	98.80%
Property and transportation | Accident Year 2010
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 680	683	679	679	676	668	662	702
Total IBNR Plus Expected Development on Reported Claims		$ 6
Cumulative Number of Reported Claims | claim		140,634
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 669	665	660	649	618	556	505	328
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[2]	98.40%
Property and transportation | Accident Year 2011
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 865	868	856	845	831	816	830
Total IBNR Plus Expected Development on Reported Claims		$ 10
Cumulative Number of Reported Claims | claim		140,418
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 847	840	821	787	742	679	373
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[2]	97.90%
Property and transportation | Accident Year 2012
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 918	922	909	897	884	890
Total IBNR Plus Expected Development on Reported Claims		$ 19
Cumulative Number of Reported Claims | claim		146,630
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 883	868	841	793	725	582
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[2]	96.20%
Property and transportation | Accident Year 2013
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 910	908	902	898	911
Total IBNR Plus Expected Development on Reported Claims		$ 22
Cumulative Number of Reported Claims | claim		142,249
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 862	831	784	721	449
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[2]	94.70%
Property and transportation | Accident Year 2014
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 843	841	852	868
Total IBNR Plus Expected Development on Reported Claims		$ 38
Cumulative Number of Reported Claims | claim		136,882
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 765	711	646	337
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[2]	90.70%
Property and transportation | Accident Year 2015
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 798	804	842
Total IBNR Plus Expected Development on Reported Claims		$ 54
Cumulative Number of Reported Claims | claim		135,029
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 683	595	367
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[2]	85.60%
Property and transportation | Accident Year 2016
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 740	771
Total IBNR Plus Expected Development on Reported Claims		$ 110
Cumulative Number of Reported Claims | claim		122,112
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 534	299
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[2]	72.20%
Property and transportation | Accident Year 2017
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 913
Total IBNR Plus Expected Development on Reported Claims		$ 273
Cumulative Number of Reported Claims | claim		128,455
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 387
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[2]	42.40%
Property and transportation | Excludes short-duration insurance contracts detail for accident years not separately presented
Claims Development [Line Items]
Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)		$ 1,049
Specialty casualty
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		9,355
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		6,155
Unpaid losses and LAE — 11th year and prior (excluding unallocated LAE)		430
Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)		3,630
Specialty casualty | Accident Year 2008
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		854	855	849	855	856	871	860	874	891	905
Total IBNR Plus Expected Development on Reported Claims		$ 41
Cumulative Number of Reported Claims | claim		59,991
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 782	768	751	727	702	653	588	490	355	162
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[3]	91.60%
Specialty casualty | Accident Year 2009
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 803	807	812	811	816	826	845	867	864
Total IBNR Plus Expected Development on Reported Claims		$ 48
Cumulative Number of Reported Claims | claim		53,192
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 722	713	698	673	636	575	494	366	160
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[3]	89.90%
Specialty casualty | Accident Year 2010
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 842	845	846	856	842	864	863	847
Total IBNR Plus Expected Development on Reported Claims		$ 65
Cumulative Number of Reported Claims | claim		52,855
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 748	734	712	676	623	539	393	179
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[3]	88.80%
Specialty casualty | Accident Year 2011
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 806	808	814	828	819	831	831
Total IBNR Plus Expected Development on Reported Claims		$ 73
Cumulative Number of Reported Claims | claim		50,851
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 694	674	643	595	506	369	165
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[3]	86.10%
Specialty casualty | Accident Year 2012
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 849	855	859	859	865	874
Total IBNR Plus Expected Development on Reported Claims		$ 104
Cumulative Number of Reported Claims | claim		49,836
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 696	658	596	495	368	163
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[3]	82.00%
Specialty casualty | Accident Year 2013
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 913	910	915	921	938
Total IBNR Plus Expected Development on Reported Claims		$ 132
Cumulative Number of Reported Claims | claim		49,412
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 698	638	530	377	171
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[3]	76.50%
Specialty casualty | Accident Year 2014
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 982	984	984	1,011
Total IBNR Plus Expected Development on Reported Claims		$ 202
Cumulative Number of Reported Claims | claim		52,167
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 659	556	398	182
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[3]	67.10%
Specialty casualty | Accident Year 2015
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 1,022	1,023	1,057
Total IBNR Plus Expected Development on Reported Claims		$ 268
Cumulative Number of Reported Claims | claim		52,846
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 560	398	170
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[3]	54.80%
Specialty casualty | Accident Year 2016
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 1,098	1,105
Total IBNR Plus Expected Development on Reported Claims		$ 426
Cumulative Number of Reported Claims | claim		50,652
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 404	181
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[3]	36.80%
Specialty casualty | Accident Year 2017
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 1,186
Total IBNR Plus Expected Development on Reported Claims		$ 715
Cumulative Number of Reported Claims | claim		46,399
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 192
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[3]	16.20%
Specialty casualty | Excludes short-duration insurance contracts detail for accident years not separately presented
Claims Development [Line Items]
Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)		$ 3,200
Specialty financial
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		1,624
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		1,403
Unpaid losses and LAE — 11th year and prior (excluding unallocated LAE)		0
Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)		221
Specialty financial | Accident Year 2008
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		199	198	197	198	199	203	209	212	207	190
Total IBNR Plus Expected Development on Reported Claims		$ 1
Cumulative Number of Reported Claims | claim		27,292
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 197	194	194	193	191	189	189	185	153	103
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[4]	99.00%
Specialty financial | Accident Year 2009
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 185	186	187	186	188	184	187	193	193
Total IBNR Plus Expected Development on Reported Claims		$ 0
Cumulative Number of Reported Claims | claim		27,441
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 186	186	185	182	171	166	157	145	112
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[4]	100.50%
Specialty financial | Accident Year 2010
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 128	130	133	135	133	133	146	139
Total IBNR Plus Expected Development on Reported Claims		$ 2
Cumulative Number of Reported Claims | claim		21,929
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 127	128	131	133	122	104	93	61
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[4]	99.20%
Specialty financial | Accident Year 2011
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 144	146	148	155	157	158	140
Total IBNR Plus Expected Development on Reported Claims		$ 11
Cumulative Number of Reported Claims | claim		16,374
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 133	132	131	124	116	113	59
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[4]	92.40%
Specialty financial | Accident Year 2012
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 135	137	139	151	163	164
Total IBNR Plus Expected Development on Reported Claims		$ 11
Cumulative Number of Reported Claims | claim		21,050
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 126	121	117	109	104	71
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[4]	93.30%
Specialty financial | Accident Year 2013
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 127	131	137	145	141
Total IBNR Plus Expected Development on Reported Claims		$ 9
Cumulative Number of Reported Claims | claim		28,279
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 117	114	107	100	70
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[4]	92.10%
Specialty financial | Accident Year 2014
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 154	156	157	146
Total IBNR Plus Expected Development on Reported Claims		$ 16
Cumulative Number of Reported Claims | claim		28,983
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 128	125	108	62
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[4]	83.10%
Specialty financial | Accident Year 2015
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 157	159	156
Total IBNR Plus Expected Development on Reported Claims		$ 21
Cumulative Number of Reported Claims | claim		37,125
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 129	109	72
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[4]	82.20%
Specialty financial | Accident Year 2016
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 183	179
Total IBNR Plus Expected Development on Reported Claims		$ 26
Cumulative Number of Reported Claims | claim		43,484
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 141	87
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[4]	77.00%
Specialty financial | Accident Year 2017
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 212
Total IBNR Plus Expected Development on Reported Claims		$ 84
Cumulative Number of Reported Claims | claim		36,116
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 119
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[4]	56.10%
Specialty financial | Excludes short-duration insurance contracts detail for accident years not separately presented
Claims Development [Line Items]
Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)		$ 221
Other specialty
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		495
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		300
Unpaid losses and LAE — 11th year and prior (excluding unallocated LAE)		83
Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)		278
Other specialty | Accident Year 2008
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		43	44	45	45	46	48	49	49	49	49
Total IBNR Plus Expected Development on Reported Claims		$ 3
Cumulative Number of Reported Claims | claim	[5]	0
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 39	38	37	37	37	35	31	23	16	$ 10
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[6]	90.70%
Other specialty | Accident Year 2009
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 33	38	36	37	37	40	41	41	41
Total IBNR Plus Expected Development on Reported Claims		$ 7
Cumulative Number of Reported Claims | claim	[5]	0
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 25	26	24	22	22	19	15	12	$ 8
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[6]	75.80%
Other specialty | Accident Year 2010
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 40	40	40	40	39	40	39	36
Total IBNR Plus Expected Development on Reported Claims		$ 2
Cumulative Number of Reported Claims | claim	[5]	0
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 36	35	33	27	24	21	14	$ 8
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[6]	90.00%
Other specialty | Accident Year 2011
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 44	44	43	43	42	43	39
Total IBNR Plus Expected Development on Reported Claims		$ 4
Cumulative Number of Reported Claims | claim	[5]	0
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 37	36	34	28	25	20	$ 12
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[6]	84.10%
Other specialty | Accident Year 2012
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 39	41	40	39	40	42
Total IBNR Plus Expected Development on Reported Claims		$ 8
Cumulative Number of Reported Claims | claim	[5]	0
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 30	28	25	21	17	$ 8
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[6]	76.90%
Other specialty | Accident Year 2013
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 50	47	46	47	46
Total IBNR Plus Expected Development on Reported Claims		$ 5
Cumulative Number of Reported Claims | claim	[5]	0
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 37	34	22	16	$ 7
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[6]	74.00%
Other specialty | Accident Year 2014
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 59	59	57	58
Total IBNR Plus Expected Development on Reported Claims		$ 16
Cumulative Number of Reported Claims | claim	[5]	0
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 36	30	21	$ 13
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[6]	61.00%
Other specialty | Accident Year 2015
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 63	60	59
Total IBNR Plus Expected Development on Reported Claims		$ 20
Cumulative Number of Reported Claims | claim	[5]	0
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 31	26	$ 10
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[6]	49.20%
Other specialty | Accident Year 2016
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 61	61
Total IBNR Plus Expected Development on Reported Claims		$ 31
Cumulative Number of Reported Claims | claim	[5]	0
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 19	$ 9
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[6]	31.10%
Other specialty | Accident Year 2017
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance		$ 63
Total IBNR Plus Expected Development on Reported Claims		$ 47
Cumulative Number of Reported Claims | claim	[5]	0
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance		$ 10
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	[6]	15.90%
Other specialty | Excludes short-duration insurance contracts detail for accident years not separately presented
Claims Development [Line Items]
Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)		$ 195

[1] Represents the cumulative percentage paid of incurred claims and allocated LAE (net of reinsurance, as estimated at December 31, 2017).

[2] Represents the cumulative percentage paid of incurred claims and allocated LAE (net of reinsurance, as estimated at December 31, 2017).

[3] Represents the cumulative percentage paid of incurred claims and allocated LAE (net of reinsurance, as estimated at December 31, 2017).

[4] Represents the cumulative percentage paid of incurred claims and allocated LAE (net of reinsurance, as estimated at December 31, 2017).

[5] The amounts shown in Other specialty represent business assumed by AFG’s internal reinsurance program from the operations that make up AFG’s other Specialty property and casualty insurance sub-segments. Accordingly, the liability for incurred claims and allocated LAE represents additional reserves held on claims counted in the tables provided for the other sub-segments (above).

[6] Represents the cumulative percentage paid of incurred claims and allocated LAE (net of reinsurance, as estimated at December 31, 2017).

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Insurance - Short-duration insurance contracts, historical claims duration (Details) - Property and casualty insurance	Dec. 31, 2017
Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance [Line Items]
Year 1	32.70%
Year 2	26.10%
Year 3	12.10%
Year 4	8.50%
Year 5	5.30%
Year 6	3.30%
Year 7	1.80%
Year 8	1.20%
Year 9	0.80%
Year 10	1.00%
Year 1, Cumulative	32.70%
Year 2, Cumulative	58.80%
Year 3, Cumulative	70.90%
Year 4, Cumulative	79.40%
Year 5, Cumulative	84.70%
Year 6, Cumulative	88.00%
Year 7, Cumulative	89.80%
Year 8, Cumulative	91.00%
Year 9, Cumulative	91.80%
Year 10, Cumulative	92.80%
Property and transportation
Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance [Line Items]
Year 1	45.90%
Year 2	29.90%
Year 3	8.40%
Year 4	6.30%
Year 5	3.70%
Year 6	1.90%
Year 7	0.90%
Year 8	0.30%
Year 9	0.40%
Year 10	0.10%
Year 1, Cumulative	45.90%
Year 2, Cumulative	75.80%
Year 3, Cumulative	84.20%
Year 4, Cumulative	90.50%
Year 5, Cumulative	94.20%
Year 6, Cumulative	96.10%
Year 7, Cumulative	97.00%
Year 8, Cumulative	97.30%
Year 9, Cumulative	97.70%
Year 10, Cumulative	97.80%
Specialty casualty
Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance [Line Items]
Year 1	18.60%
Year 2	23.40%
Year 3	16.20%
Year 4	11.00%
Year 5	6.90%
Year 6	4.60%
Year 7	2.80%
Year 8	2.10%
Year 9	1.60%
Year 10	1.60%
Year 1, Cumulative	18.60%
Year 2, Cumulative	42.00%
Year 3, Cumulative	58.20%
Year 4, Cumulative	69.20%
Year 5, Cumulative	76.10%
Year 6, Cumulative	80.70%
Year 7, Cumulative	83.50%
Year 8, Cumulative	85.60%
Year 9, Cumulative	87.20%
Year 10, Cumulative	88.80%
Specialty financial
Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance [Line Items]
Year 1	49.80%
Year 2	26.30%
Year 3	8.30%
Year 4	5.70%
Year 5	3.60%
Year 6	2.00%
Year 7	0.20%
Year 8	0.10%
Year 9	0.00%
Year 10	1.50%
Year 1, Cumulative	49.80%
Year 2, Cumulative	76.10%
Year 3, Cumulative	84.40%
Year 4, Cumulative	90.10%
Year 5, Cumulative	93.70%
Year 6, Cumulative	95.70%
Year 7, Cumulative	95.90%
Year 8, Cumulative	96.00%
Year 9, Cumulative	96.00%
Year 10, Cumulative	97.50%
Other specialty
Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance [Line Items]
Year 1	19.80%
Year 2	17.30%
Year 3	12.50%
Year 4	12.80%
Year 5	8.90%
Year 6	5.90%
Year 7	3.30%
Year 8	2.90%
Year 9	(0.40%)
Year 10	2.30%
Year 1, Cumulative	19.80%
Year 2, Cumulative	37.10%
Year 3, Cumulative	49.60%
Year 4, Cumulative	62.40%
Year 5, Cumulative	71.30%
Year 6, Cumulative	77.20%
Year 7, Cumulative	80.50%
Year 8, Cumulative	83.40%
Year 9, Cumulative	83.00%
Year 10, Cumulative	85.30%

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Insurance - Net earnings and capital and surplus on a statutory basis for the insurance subsidiaries (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property and casualty companies
Statutory information
Net Earnings	$ 484	$ 461	$ 408
Capital and Surplus	2,729	2,939
Life insurance companies
Statutory information
Net Earnings	286	167	$ 399
Capital and Surplus	$ 2,132	$ 1,976

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Insurance - Reinsurance information table including assumed, ceded, and recoveries (Details) - Property and casualty insurance - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Effects of Reinsurance [Line Items]
Direct premiums written	$ 6,310	$ 5,858	$ 5,713
Reinsurance assumed	192	123	119
Reinsurance ceded	(1,751)	(1,595)	(1,505)
Net written premiums	4,751	4,386	4,327
Direct premiums earned	6,112	5,745	5,613
Reinsurance assumed	157	118	105
Reinsurance ceded	(1,690)	(1,535)	(1,494)
Net earned premiums	4,579	4,328	4,224
Reinsurance recoveries	$ 1,379	$ 810	$ 936

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Insurance - Liabilities for excess benefits expected to be paid on future deaths and annuitizations, guaranteed withdrawal benefits and accrued persistency and premium bonuses (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Insurance [Abstract]
Expected death and annuitization	$ 228	$ 223
Guaranteed withdrawal benefits	357	278
Accrued persistency and premium bonuses	$ 3	$ 6

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Additional Information - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Allowance for reinsurance recoverables [Line Items]
Total rental expense	$ 69	$ 67	$ 70
Operating lease future minimum payments due in next year	63
Operating lease future minimum payments due in year two	57
Operating lease future minimum payments due in year three	50
Operating lease future minimum payments due in year four	42
Operating lease future minimum payments due in year five	34
Operating lease future minimum payments due after year five	100
Commitments to fund limited partnerships	484
Retirement and employee savings plan expense	45	43	34
Allowance for reinsurance recoverables
Allowance for reinsurance recoverables [Line Items]
Aggregate allowance for losses on reinsurance recoverables	20	22
Net expense reduction against the allowance for losses on reinsurance recoverables			$ (3)
Reinsurance recoverable write-offs	2
Maximum | Allowance for reinsurance recoverables
Allowance for reinsurance recoverables [Line Items]
Net expense reduction against the allowance for losses on reinsurance recoverables	$ (1)	$ (1)

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Condensed Financial Information of Parent Company - Condensed Balance Sheet (Details) - USD ($) $ in Millions		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Assets:
Cash and cash equivalents		$ 2,338	$ 2,107	$ 1,220	$ 1,343
Other investments		1,311	1,034
Total assets		60,658	55,072	49,837
Liabilities and Equity:
Long-term debt		1,301	1,283
Shareholders’ equity		5,330	4,916
Total liabilities and equity		60,658	55,072
AFG
Assets:
Cash and cash equivalents		299	197	$ 189	$ 292
Investment in securities		70	63
Investment in subsidiaries	[1]	6,310	5,989
Other investments		2	2
Other assets		141	136
Total assets		6,822	6,387
Liabilities and Equity:
Long-term debt		1,301	1,283
Other liabilities		191	188
Shareholders’ equity		5,330	4,916
Total liabilities and equity		$ 6,822	$ 6,387

[1] Investment in subsidiaries includes intercompany receivables and payables.

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Condensed Financial Information of Parent Company - Condensed Statement of Earnings (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues:
Total revenues	$ 1,808	$ 1,835	$ 1,646	$ 1,576	$ 1,737	$ 1,705	$ 1,581	$ 1,475	$ 6,865	$ 6,498	$ 6,145
Costs and Expenses:
Other expenses									422	353	336
Total costs and expenses									6,141	5,711	5,580
Earnings before income taxes									724	787	565
Provision for income taxes									247	119	195
Net Earnings Attributable to Shareholders	166	$ 11	$ 145	$ 153	385	$ 109	$ 54	$ 101	475	649	352
AFG
Revenues:
Dividends from subsidiaries									681	643	311
Equity in undistributed earnings of subsidiaries									264	286	386
Investment and other income									13	7	4
Total revenues									958	936	701
Costs and Expenses:
Interest charges on intercompany borrowings									9	9	9
Interest charges on other borrowings									85	77	73
Other expenses									142	82	72
Total costs and expenses									236	168	154
Earnings before income taxes									722	768	547
Provision for income taxes	$ (56)				$ (177)				247	119	195
Net Earnings Attributable to Shareholders									$ 475	$ 649	$ 352

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Condensed Financial Information of Parent Company - Condensed Statement of Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of Other Comprehensive Income [Abstract]
Net earnings attributable to shareholders	$ 166	$ 11	$ 145	$ 153	$ 385	$ 109	$ 54	$ 101	$ 475	$ 649	$ 352
Comprehensive income (loss) attributable to shareholders									771	711	(71)
AFG
Statement of Other Comprehensive Income [Abstract]
Net earnings attributable to shareholders									475	649	352
Other comprehensive income (loss), net of tax									296	62	(423)
Comprehensive income (loss) attributable to shareholders									$ 771	$ 711	$ (71)

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Condensed Financial Information of Parent Company - Condensed Statement of Cash Flows (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating Activities:
Net earnings attributable to shareholders	$ 166	$ 11	$ 145	$ 153	$ 385	$ 109	$ 54	$ 101	$ 475	$ 649	$ 352
Adjustments:
Net cash provided by operating activities									1,804	1,150	1,353
Investing Activities:
Net cash used in investing activities									(3,292)	(2,981)	(4,573)
Financing Activities:
Additional long-term borrowings									712	302	145
Reductions of long-term debt									(745)	(18)	(192)
Issuances of Common Stock									37	35	61
Repurchases of Common Stock									0	(133)	(126)
Cash dividends paid on Common Stock									(417)	(185)	(176)
Net cash provided by (used in) financing activities									1,719	2,718	3,097
Net Change in Cash and Cash Equivalents									231	887	(123)
Cash and cash equivalents at beginning of year				2,107				1,220	2,107	1,220	1,343
Cash and cash equivalents at end of year	2,338				2,107				2,338	2,107	1,220
AFG
Operating Activities:
Net earnings attributable to shareholders									475	649	352
Adjustments:
Equity in net earnings of subsidiaries									(575)	(638)	(451)
Dividends from subsidiaries									580	611	280
Other operating activities, net									98	(67)	(19)
Net cash provided by operating activities									578	555	162
Investing Activities:
Capital contributions to subsidiaries									(93)	(560)	(27)
Returns of capital from subsidiaries									30	0	1
Purchases of investments, property and equipment									(2)	(1)	(10)
Proceeds from maturities and redemptions of investments									2	1	0
Proceeds from sales of investments, property and equipment									0	0	3
Net cash used in investing activities									(63)	(560)	(33)
Financing Activities:
Additional long-term borrowings									712	296	145
Reductions of long-term debt									(745)	0	(132)
Issuances of Common Stock									37	35	57
Repurchases of Common Stock									0	(133)	(126)
Cash dividends paid on Common Stock									(417)	(185)	(176)
Net cash provided by (used in) financing activities									(413)	13	(232)
Net Change in Cash and Cash Equivalents									102	8	(103)
Cash and cash equivalents at beginning of year				$ 197				$ 189	197	189	292
Cash and cash equivalents at end of year	$ 299				$ 197				$ 299	$ 197	$ 189

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Supplementary Insurance Information - Table (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Supplementary Insurance Information, by Segment [Line Items]
Deferred policy acquisition costs	$ 1,216	$ 1,239	$ 1,184
Reserves for future policy benefits, claims and unpaid losses and LAE	43,652	39,161	35,454
Unearned premiums	2,410	2,171	2,060
Net earned premiums	4,601	4,352	4,328
Net investment income	1,831	1,696	1,633
Benefits, claims, losses and settlement expenses	3,873	3,595	3,558
Amortization of deferred policy acquisition costs	690	673	653
Other operating expenses	1,578	1,443	1,369
Net written premiums (excluding life)	4,754	4,389	4,400
Property and casualty insurance
Supplementary Insurance Information, by Segment [Line Items]
Deferred policy acquisition costs	270	238	226
Reserves for future policy benefits, claims and unpaid losses and LAE	9,678	8,563	8,127
Unearned premiums	2,410	2,171	2,060
Net earned premiums	4,579	4,328	4,224
Net investment income	362	350	319
Benefits, claims, losses and settlement expenses	2,955	2,762	2,695
Amortization of deferred policy acquisition costs	556	520	511
Other operating expenses	867	870	839
Net written premiums (excluding life)	4,751	4,386	4,327
Annuity
Supplementary Insurance Information, by Segment [Line Items]
Deferred policy acquisition costs	920	981	934
Reserves for future policy benefits, claims and unpaid losses and LAE	33,316	29,907	26,622
Net investment income	1,458	1,356	1,224
Benefits, claims, losses and settlement expenses	892	800	732
Amortization of deferred policy acquisition costs	130	149	136
Other operating expenses	159	142	123
Run-off long-term care and life
Supplementary Insurance Information, by Segment [Line Items]
Deferred policy acquisition costs	26	20	24
Reserves for future policy benefits, claims and unpaid losses and LAE	658	691	705
Net earned premiums	22	24	104
Net investment income	20	21	80
Benefits, claims, losses and settlement expenses	26	33	131
Amortization of deferred policy acquisition costs	4	4	6
Other operating expenses	11	10	37
Net written premiums (excluding life)	3	3	73
Other
Supplementary Insurance Information, by Segment [Line Items]
Net investment income	(9)	(31)	10
Other operating expenses	$ 541	$ 421	$ 370