10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

(Mark one)

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

For the quarterly period ended September 30, 2017.

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

For the transition period from _____________________ to _____________________.

Commission file number 0-4604

CINCINNATI FINANCIAL CORPORATION

(Exact name of registrant as specified in its charter)

Ohio	31-0746871
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
6200 S. Gilmore Road, Fairfield, Ohio	45014-5141
(Address of principal executive offices)	(Zip code)

Registrant’s telephone number, including area code: (513) 870-2000

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. 

þYes ¨ No

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate website, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).

þYes ¨ No

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

þ Large accelerated filer ¨ Accelerated filer ¨ Nonaccelerated filer ¨ Smaller reporting company

¨ Emerging growth company

(Do not check if a smaller reporting company)

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

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act):

¨Yes þ No

As of October 20, 2017, there were 164,071,775 shares of common stock outstanding.

CINCINNATI FINANCIAL CORPORATION AND SUBSIDIARIES

FORM 10-Q FOR THE QUARTER ENDED SEPTEMBER 30, 2017

TABLE OF CONTENTS

Part I – Financial Information	3
Item 1. Financial Statements (unaudited)	3
Condensed Consolidated Balance Sheets	3
Condensed Consolidated Statements of Income	4
Condensed Consolidated Statements of Comprehensive Income	5
Condensed Consolidated Statements of Shareholders’ Equity	6
Condensed Consolidated Statements of Cash Flows	7
Notes to Condensed Consolidated Financial Statements (unaudited)	8
Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations	31
Safe Harbor Statement	31
Corporate Financial Highlights	33
Financial Results	44
Liquidity and Capital Resources	59
Other Matters	63
Item 3. Quantitative and Qualitative Disclosures about Market Risk	63
Item 4. Controls and Procedures	72
Part II – Other Information	72
Item 1. Legal Proceedings	72
Item 1A. Risk Factors	72
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds	72
Item 6. Exhibits	73

Cincinnati Financial Corporation Third-Quarter 2017 10-Q

Page 2

Part I – Financial Information

Item 1.    Financial Statements (unaudited)

Cincinnati Financial Corporation and Subsidiaries

Condensed Consolidated Balance Sheets

(Dollars in millions except per share data)	September 30,			December 31,
	2017			2016
Assets
Investments
Fixed maturities, at fair value (amortized cost: 2017—$10,135; 2016—$9,799)	$	10,540		$	10,085
Equity securities, at fair value (cost: 2017—$3,264; 2016—$2,995)	6,025			5,334
Other invested assets	99			81
Total investments	16,664			15,500
Cash and cash equivalents	674			777
Investment income receivable	128			134
Finance receivable	56			51
Premiums receivable	1,640			1,533
Reinsurance recoverable	522			545
Prepaid reinsurance premiums	44			62
Deferred policy acquisition costs	676			637
Land, building and equipment, net, for company use (accumulated depreciation:    2017—$251; 2016—$237)	186			183
Other assets	204			198
Separate accounts	798			766
Total assets	$	21,592		$	20,386
Liabilities
Insurance reserves
Loss and loss expense reserves	$	5,350		$	5,085
Life policy and investment contract reserves	2,716			2,671
Unearned premiums	2,475			2,307
Other liabilities	800			786
Deferred income tax	1,087			865
Note payable	17			20
Long-term debt and capital lease obligations	826			826
Separate accounts	798			766
Total liabilities	14,069			13,326
Commitments and contingent liabilities (Note 12)
Shareholders' Equity
Common stock, par value—$2 per share; (authorized: 2017 and 2016—198.3 million shares; issued: 2017 and 2016—198.3 million shares)	397			397
Paid-in capital	1,256			1,252
Retained earnings	5,193			5,037
Accumulated other comprehensive income	2,047			1,693
Treasury stock at cost (2017—34.3 million shares and 2016—33.9 million shares)	(1,370		)	(1,319		)
Total shareholders' equity	7,523			7,060
Total liabilities and shareholders' equity	$	21,592		$	20,386

 Accompanying Notes are an integral part of these Condensed Consolidated Financial Statements.

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Cincinnati Financial Corporation and Subsidiaries

Condensed Consolidated Statements of Income

(Dollars in millions except per share data)	Three months ended September 30,				Nine months ended September 30,
	2017		2016		2017		2016
Revenues
Earned premiums	$	1,247	$	1,191	$	3,696	$	3,518
Investment income, net of expenses	153		148		453		442
Realized investment gains and losses, net	7		56		156		161
Fee revenues	3		5		12		11
Other revenues	2		2		4		5
Total revenues	1,412		1,402		4,321		4,137
Benefits and Expenses
Insurance losses and contract holders' benefits	874		753		2,581		2,298
Underwriting, acquisition and insurance expenses	393		380		1,157		1,106
Interest expense	13		13		39		39
Other operating expenses	3		3		11		10
Total benefits and expenses	1,283		1,149		3,788		3,453
Income Before Income Taxes	129		253		533		684
Provision for Income Taxes
Current	27		60		98		173
Deferred	—		13		32		20
Total provision for income taxes	27		73		130		193
Net Income	$	102	$	180	$	403	$	491
Per Common Share
Net income—basic	$	0.62	$	1.09	$	2.45	$	2.98
Net income—diluted	0.61		1.08		2.42		2.95

Accompanying Notes are an integral part of these Condensed Consolidated Financial Statements.

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Cincinnati Financial Corporation and Subsidiaries

Condensed Consolidated Statements of Comprehensive Income

(Dollars in millions)	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017		2016
Net Income	$	102		$	180		$	403	$	491
Other Comprehensive Income
Change in unrealized gains on investments, net of tax   of $66, $21, $189 and $224, respectively	123			41			352		417
Amortization of pension actuarial loss and prior   service cost, net of tax of $1, $0, $1 and $1,   respectively	—			—			1		1
Change in life deferred acquisition costs, life policy   reserves and other, net of tax (benefit) of $(1), $0,   $0 and $(4), respectively	(1		)	(3		)	1		(10		)
Other comprehensive income	122			38			354		408
Comprehensive Income	$	224		$	218		$	757	$	899

Accompanying Notes are an integral part of these Condensed Consolidated Financial Statements.

Cincinnati Financial Corporation Third-Quarter 2017 10-Q

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Cincinnati Financial Corporation and Subsidiaries

Condensed Consolidated Statements of Shareholders' Equity

(Dollars in millions)	Nine months ended September 30,
	2017			2016
Common Stock
Beginning of year	$	397		$	397
Share-based awards	—			—
End of period	397			397
Paid-In Capital
Beginning of year	1,252			1,232
Share-based awards	(18		)	(9		)
Share-based compensation	19			18
Other	3			3
End of period	1,256			1,244
Retained Earnings
Beginning of year	5,037			4,762
Net income	403			491
Dividends declared	(247		)	(237		)
End of period	5,193			5,016
Accumulated Other Comprehensive Income
Beginning of year	1,693			1,344
Other comprehensive income	354			408
End of period	2,047			1,752
Treasury Stock
Beginning of year	(1,319		)	(1,308		)
Share-based awards	22			29
Shares acquired - share repurchase authorization	(70		)	(2		)
Shares acquired - share-based compensation plans	(6		)	(10		)
Other	3			3
End of period	(1,370		)	(1,288		)
Total Shareholders' Equity	$	7,523		$	7,121
(In millions)
Common Stock - Shares Outstanding
Beginning of year	164.4			163.9
Share-based awards	0.7			0.8
Shares acquired - share repurchase authorization	(1.0		)	—
Shares acquired - share-based compensation plans	(0.1		)	(0.1		)
Other	—			0.1
End of period	164.0			164.7

Accompanying Notes are an integral part of these Condensed Consolidated Financial Statements.

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Cincinnati Financial Corporation and Subsidiaries

Condensed Consolidated Statements of Cash Flows

(Dollars in millions)	Nine months ended September 30,
	2017			2016
Cash Flows From Operating Activities
Net income	$	403		$	491
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	40			34
Realized investment gains, net	(156		)	(161		)
Share-based compensation	19			18
Interest credited to contract holders'	36			36
Deferred income tax expense	32			20
Changes in:
Investment income receivable	6			8
Premiums and reinsurance receivable	(66		)	(111		)
Deferred policy acquisition costs	(44		)	(31		)
Other assets	(34		)	(32		)
Loss and loss expense reserves	265			273
Life policy reserves	71			75
Unearned premiums	168			187
Other liabilities	(46		)	11
Current income tax receivable/payable	52			17
Net cash provided by operating activities	746			835
Cash Flows From Investing Activities
Sale of fixed maturities	20			15
Call or maturity of fixed maturities	815			1,160
Sale of equity securities	290			311
Purchase of fixed maturities	(1,155		)	(1,465		)
Purchase of equity securities	(399		)	(396		)
Investment in finance receivables	(21		)	(13		)
Collection of finance receivables	17			24
Investment in buildings and equipment, net	(14		)	(9		)
Change in other invested assets, net	(12		)	(13		)
Net cash used in investing activities	(459		)	(386		)
Cash Flows From Financing Activities
Payment of cash dividends to shareholders	(239		)	(229		)
Shares acquired - share repurchase authorization	(70		)	(2		)
Payments of note payable	(3		)	(15		)
Proceeds from stock options exercised	10			17
Contract holders' funds deposited	60			71
Contract holders' funds withdrawn	(119		)	(118		)
Excess tax benefits on share-based compensation	—			4
Other	(29		)	(21		)
Net cash used in financing activities	(390		)	(293		)
Net change in cash and cash equivalents	(103		)	156
Cash and cash equivalents at beginning of year	777			544
Cash and cash equivalents at end of period	$	674		$	700
Supplemental Disclosures of Cash Flow Information:
Interest paid	$	26		$	26
Income taxes paid	44			152
Noncash Activities
Conversion of securities	$	5		$	4
Equipment acquired under capital lease obligations	10			18
Cashless exercise of stock options	6			10
Other assets and other liabilities	74			29

 Accompanying Notes are an integral part of these Condensed Consolidated Financial Statements.

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

NOTE 1 — Accounting Policies

The condensed consolidated financial statements include the accounts of Cincinnati Financial Corporation and its consolidated subsidiaries, each of which is wholly owned. These statements are presented in conformity with accounting principles generally accepted in the United States of America (GAAP). All intercompany balances and transactions have been eliminated in consolidation.

The preparation of financial statements in conformity with GAAP requires us to make estimates and assumptions that affect amounts reported in the financial statements and accompanying notes. Our actual results could differ from those estimates. Certain financial information that is normally included in annual financial statements prepared in accordance with GAAP, but that is not required for interim reporting purposes, has been condensed or omitted.

Our September 30, 2017, condensed consolidated financial statements are unaudited. We believe that we have made all adjustments, consisting only of normal recurring accruals, that are necessary for fair presentation. These condensed consolidated financial statements should be read in conjunction with our consolidated financial statements included in our 2016 Annual Report on Form 10-K. The results of operations for interim periods do not necessarily indicate results to be expected for the full year.

Adopted Accounting Updates

ASU 2016-07, Investments - Equity Method and Joint Ventures (Topic 323): Simplifying the Transition to the Equity Method of Accounting

In March 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2016-07, Equity Method and Joint Ventures (Topic 323): Simplifying the Transition to the Equity Method of Accounting. ASU 2016-07 eliminates the requirement to retroactively adjust an investment, results of operations, and retained earnings once an investment qualifies for use of the equity method. It requires the equity method investor to add the cost of acquiring the additional interest in the investee to the current basis of the investor's previously held interest and adopt the equity method of accounting as of the date the investment becomes qualified for equity method accounting without retroactive adjustment. The effective date of ASU 2016-07 was for interim and annual reporting periods beginning after December 15, 2016, and was applied prospectively. The company adopted this ASU effective January 1, 2017, and it did not have a material impact on our company's consolidated financial position, cash flows or results of operations.

ASU 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting

In March 2016, the FASB issued ASU 2016-09, Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. ASU 2016-09 simplifies several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. The effective date of ASU 2016-09 was for interim and annual reporting periods beginning after December 15, 2016. The recognition and classification of the excess tax benefit provisions were applied prospectively in the results of operations and statement of cash flows. This adoption resulted in excess tax benefits of an immaterial amount for the three months ended September 30, 2017, and

$7 million for the nine months ended September 30, 2017, which reduced our current provision for income taxes in our results of operations. The statutory tax withholding classification, which are cash payments made to taxing authorities for shares withheld, were applied retrospectively and reclassified the statutory tax withholding requirements in the statement of cash flows from Other liabilities in operating activities to Other in financing activities. This statutory tax withholding reclassification resulted in $13 million and $11 million being included in financing activities for the nine months ended September 30, 2017 and 2016, respectively. There were no cumulative effect adjustments upon adoption of this ASU.

Pending Accounting Updates

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ASU 2014-09 Revenue from Contracts with Customers

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers. ASU 2014-09 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 and services. Insurance contracts do not fall within the scope of this ASU. The effective date of ASU 2014-09 is for interim and annual reporting periods beginning after December 15, 2017. The ASU has not yet been adopted and will not have a material impact on our company’s financial position, cash flows or results of operations.

ASU 2016-01, Financial Instruments - Overall (Subtopic 825-10) - Recognition and Measurement of Financial Assets and Financial Liabilities

In January 2016, the FASB issued ASU 2016-01, Financial Instruments - Overall (Subtopic 825-10) - Recognition and Measurement of Financial Assets and Financial Liabilities. ASU 2016-01 revises the accounting related to the classification and measurement of investments in equity securities and the presentation of certain fair value changes for financial liabilities measured at fair value. Our results of operations will be impacted as changes in fair value of equity securities will be reported in net income instead of reported in other comprehensive income. The effective date of ASU 2016-01 is for interim and annual reporting periods beginning after December 15, 2017, and will be applied prospectively. The ASU has not yet been adopted. Had we adopted this ASU on September 30, 2017, $1.795 billion of after-tax unrealized gains on equity securities would have been reclassified from accumulated other comprehensive income to retained earnings. The actual amount reclassified upon adoption will vary depending on the future changes in fair value of our equity portfolio.

ASU 2016-02, Leases (Topic 842)

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). The main provision of ASU 2016-02 requires the recognition of lease assets and lease liabilities by lessees for those leases classified as operating leases under previous GAAP. The effective date of ASU 2016-02 is for interim and annual reporting periods beginning after December 15, 2018. The ASU has not yet been adopted. Management is currently evaluating the impact on our company’s consolidated financial position, cash flows and results of operations.

ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments

In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. ASU 2016-13 amends previous guidance on the impairment of financial instruments by adding an impairment model that allows an entity to recognize expected credit losses as an allowance rather than impairing as they are incurred. The new guidance is intended to reduce complexity of credit impairment models and result in a more timely recognition of expected credit losses. The effective date of ASU 2016-13 is for interim and annual reporting periods beginning after December 15, 2019. The ASU has not yet been adopted. Management is currently evaluating the impact on our company's consolidated financial position, cash flows or results of operations.

ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments

In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. ASU 2016-15 addresses eight specific cash flow issues with the objective of reducing the existing diversity in practice. The effective date of ASU 2016-15 is for interim and annual reporting periods beginning after December 15, 2017. The ASU has not yet been adopted; however, it will not have a material impact on our company's consolidated financial position, cash flows or results of operations.

ASU 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost

In March 2017, the FASB issued ASU 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Postretirement Benefit Costs. ASU 2017-07 provides guidance on how to present the components of net periodic benefit costs in the income statement for pension plans and other post-retirement benefit plans. The effective date of ASU 2017-07 is for interim and annual reporting periods beginning after December 15, 2017. The ASU has not yet been adopted; however, it will not have a material impact on our company's consolidated financial position, cash flows or results of operations.

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ASU 2017-08, Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities

In March 2017, the FASB issued ASU 2017-08, Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities. ASU 2017-08 amends guidance on the amortization period of premiums on certain purchased callable debt securities. The amendments shorten the amortization period of premiums on certain purchased callable debt securities to the earliest call date. The amendments should be applied on a modified retrospective basis through a cumulative-effect adjustment to beginning retained earnings. The effective date of ASU 2017-08 is for interim and annual reporting periods beginning after December 15, 2018. The ASU has not yet been adopted; however, it is not expected to have a material impact on our company's consolidated financial position, cash flows or results of operations.

ASU 2017-09, Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting

In May 2017, the FASB issued ASU 2017-09, Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting. ASU 2017-09 clarifies when to account for a change to the terms or conditions of a share-based payment award as a modification. Under the new guidance, modification accounting is required only if the fair value, the vesting conditions, or the classification of the award (as equity or liability) changes as a result of the change in terms or conditions. The amendment should be applied on a prospective basis. The effective date of ASU 2017-09 is for interim and annual reporting periods, beginning after December 15, 2017. The ASU has not yet been adopted; however, it will not have a material impact on our company's consolidated financial position, cash flows or results of operations upon adoption.

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NOTE 2 – Investments

The following table provides cost or amortized cost, gross unrealized gains, gross unrealized losses and fair value for our fixed-maturity and equity securities:

(Dollars in millions)	Cost or amortized cost
			Gross unrealized				Fair value
At September 30, 2017			gains		losses
Fixed maturity securities:
Corporate	$	5,514	$	280	$	11	$	5,783
States, municipalities and political subdivisions	4,103		144		13		4,234
Commercial mortgage-backed	280		8		—		288
Government-sponsored enterprises	207		—		3		204
United States government	16		—		—		16
Foreign government	10		—		—		10
Convertibles and bonds with warrants attached	5		—		—		5
Subtotal	10,135		432		27		10,540
Equity securities:
Common equities	3,084		2,762		38		5,808
Nonredeemable preferred equities	180		37		—		217
Subtotal	3,264		2,799		38		6,025
Total	$	13,399	$	3,231	$	65	$	16,565
At December 31, 2016
Fixed maturity securities:
Corporate	$	5,555	$	252	$	26	$	5,781
States, municipalities and political subdivisions	3,770		100		42		3,828
Commercial mortgage-backed	282		7		2		287
Government-sponsored enterprises	167		—		3		164
United States government	10		—		—		10
Foreign government	10		—		—		10
Convertibles and bonds with warrants attached	5		—		—		5
Subtotal	9,799		359		73		10,085
Equity securities:
Common equities	2,812		2,320		9		5,123
Nonredeemable preferred equities	183		28		—		211
Subtotal	2,995		2,348		9		5,334
Total	$	12,794	$	2,707	$	82	$	15,419

The net unrealized investment gains in our fixed-maturity portfolio at September 30, 2017, are primarily the result of the continued low interest rate environment that increased the fair value of our fixed-maturity portfolio. Our commercial mortgage-backed securities had an average rating of Aa1/AA at September 30, 2017, and December 31, 2016. At September 30, 2017, the seven largest unrealized investment gains in our common stock portfolio are from Honeywell International Incorporated (NYSE:HON), JP Morgan Chase & Co. (NYSE:JPM), Apple Inc. (Nasdaq:AAPL), Blackrock Inc. (Nasdaq:BLK), Microsoft Corporation (Nasdaq:MSFT), Johnson & Johnson (NYSE:JNJ) and 3M Company (NYSE:MMM), which had a combined gross unrealized gain of $864 million. At September 30, 2017, Apple Inc. was our largest single equity holding with a fair value of $216 million, which was 3.7 percent of our publicly traded common equities portfolio and 1.3 percent of the total investment portfolio.

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The table below provides fair values and gross unrealized losses by investment category and by the duration of the securities’ continuous unrealized loss positions:

(Dollars in millions)	Less than 12 months				12 months or more				Total
	Fair value		Unrealized losses		Fair value		Unrealized losses		Fair value		Unrealized losses
At September 30, 2017
Fixed maturity securities:
Corporate	$	231	$	4	$	193	$	7	$	424	$	11
States, municipalities and political subdivisions	508		8		122		5		630		13
Commercial mortgage-backed securities	43		—		3		—		46		—
Government-sponsored enterprises	152		3		43		—		195		3
United States government	7		—		—		—		7		—
Subtotal	941		15		361		12		1,302		27
Equity securities:
Common equities	276		38		—		—		276		38
Subtotal	276		38		—		—		276		38
Total	$	1,217	$	53	$	361	$	12	$	1,578	$	65
At December 31, 2016
Fixed maturity securities:
Corporate	$	733	$	15	$	189	$	11	$	922	$	26
States, municipalities and political subdivisions	989		42		—		—		989		42
Commercial mortgage-backed	89		2		2		—		91		2
Government-sponsored enterprises	155		3		—		—		155		3
United States government	6		—		—		—		6		—
Subtotal	1,972		62		191		11		2,163		73
Equity securities:
Common equities	103		9		—		—		103		9
Nonredeemable preferred equities	4		—		—		—		4		—
Subtotal	107		9		—		—		107		9
Total	$	2,079	$	71	$	191	$	11	$	2,270	$	82

Contractual maturity dates for fixed-maturity investments were:

(Dollars in millions)	Amortized cost		Fair value		% of fair value
At September 30, 2017
Maturity dates:
Due in one year or less	$	674	$	686	6.5	%
Due after one year through five years	2,668		2,803		26.6
Due after five years through ten years	3,853		4,009		38.0
Due after ten years	2,940		3,042		28.9
Total	$	10,135	$	10,540	100.0	%

Actual maturities may differ from contractual maturities when there is a right to call or prepay obligations with or without call or prepayment penalties.

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The following table provides investment income, realized investment gains and losses, the change in unrealized investment gains and losses:

(Dollars in millions)	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Investment income:
Interest	$	112		$	111		$	334		$	330
Dividends	43			39			124			117
Other	1			1			3			2
Total	156			151			461			449
Less investment expenses	3			3			8			7
Total	$	153		$	148		$	453		$	442
Realized investment gains and losses:
Fixed maturities:
Gross realized gains	$	3		$	10		$	16		$	17
Gross realized losses	—			—			—			(1		)
Other-than-temporary impairments	—			—			(6		)	(2		)
Equity securities:
Gross realized gains	1			47			160			147
Gross realized losses	—			—			(14		)	(1		)
Other-than-temporary impairments	—			—			(3		)	—
Other	3			(1		)	3			1
Total	$	7		$	56		$	156		$	161
Change in unrealized investment gains and losses:
Fixed maturities	$	9		$	(20	)	$	119		$	274
Equity securities	180			82			422			367
Income tax provision	(66		)	(21		)	(189		)	(224		)
Total	$	123		$	41		$	352		$	417

During the three months ended September 30, 2017, there were no equity securities and no fixed-maturity securities other-than-temporarily impaired. During the nine months ended September 30, 2017, there were five equity securities and one fixed-maturity security other-than-temporarily impaired. There were no credit losses on fixed-maturity securities for which a portion of other-than-temporary impairment (OTTI) has been recognized in other comprehensive income for the three and nine months ended September 30, 2017 and 2016.

At September 30, 2017, 94 fixed-maturity investments with a total unrealized loss of $12 million had been in an unrealized loss position for 12 months or more. Of that total, no fixed-maturity investment had a fair value below 70 percent of amortized cost. At September 30, 2017, no equity investment had been in an unrealized loss position for 12 months or more. There were no equity investments with a fair value below 70 percent of amortized cost. At December 31, 2016, 32 fixed-maturity investments with a total unrealized loss of $11 million had been in an unrealized loss position for 12 months or more. Of that total, no fixed-maturity investments had fair values below 70 percent of amortized cost. There were no equity security investments in an unrealized loss position for 12 months or more as of December 31, 2016. There were no equity investments with a fair value below 70 percent of amortized cost at December 31, 2016.

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NOTE 3 – Fair Value Measurements

In accordance with accounting guidance for fair value measurements and disclosures, we categorized our financial instruments, based on the priority of the observable and market-based data for the valuation technique used, into a three-level fair value hierarchy. The fair value hierarchy gives the highest priority to quoted prices with readily available independent data in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable market inputs (Level 3). When various inputs for measurement fall within different levels of the fair value hierarchy, the lowest observable input that has a significant impact on fair value measurement is used. Our valuation techniques have not changed from those used at December 31, 2016, and ultimately management determines fair value. See our 2016 Annual Report on Form 10-K, Item 8, Note 3, Fair Value Measurements, Page 132, for information on characteristics and valuation techniques used in determining fair value.

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Fair Value Disclosures for Assets

The following tables illustrate the fair value hierarchy for those assets measured at fair value on a recurring basis at September 30, 2017, and December 31, 2016. We do not have any material liabilities carried at fair value. There were no transfers between Level 1 and Level 2.

(Dollars in millions)	Quoted prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)		Total
At September 30, 2017
Fixed maturities, available for sale:
Corporate	$	—	$	5,782	$	1	$	5,783
States, municipalities and political subdivisions	—		4,229		5		4,234
Commercial mortgage-backed	—		288		—		288
Government-sponsored enterprises	—		204		—		204
United States government	16		—		—		16
Foreign government	—		10		—		10
Convertibles and bonds with warrants attached	—		5		—		5
Subtotal	16		10,518		6		10,540
Common equities, available for sale	5,808		—		—		5,808
Nonredeemable preferred equities, available for sale	—		217		—		217
Separate accounts taxable fixed maturities	—		783		—		783
Top Hat savings plan mutual funds and common equity (included in Other assets)	30		—		—		30
Total	$	5,854	$	11,518	$	6	$	17,378
At December 31, 2016
Fixed maturities, available for sale:
Corporate	$	—	$	5,703	$	78	$	5,781
States, municipalities and political subdivisions	—		3,828		—		3,828
Commercial mortgage-backed	—		287		—		287
Government-sponsored enterprises	—		164		—		164
United States government	10		—		—		10
Foreign government	—		10		—		10
Convertibles and bonds with warrants attached	—		5		—		5
Subtotal	10		9,997		78		10,085
Common equities, available for sale	5,123		—		—		5,123
Nonredeemable preferred equities, available for sale	—		211		—		211
Separate accounts taxable fixed maturities	—		750		—		750
Top Hat savings plan mutual funds and common   equity (included in Other assets)	24		—		—		24
Total	$	5,157	$	10,958	$	78	$	16,193

Each financial instrument that was deemed to have significant unobservable inputs when determining valuation is identified in the following tables by security type with a summary of changes in fair value as of September 30, 2017. Total Level 3 assets continue to be less than 1 percent of financial assets measured at fair value in the condensed consolidated balance sheets. Assets presented in the table below were valued based primarily on broker/dealer quotes for which there is a lack of transparency as to inputs used to develop the valuations. Transfers out of Level 3 included situations where a broker quote was used without observable inputs or data that could be corroborated by our pricing vendors in the prior period and significant other observable inputs were identified in the current period. The quantitative detail of these unobservable inputs is neither provided nor reasonably available to us.

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The following table provides the change in Level 3 assets for the three months ended September 30:

(Dollars in millions)	Asset fair value measurements using significant unobservable inputs (Level 3)
	Corporate fixed maturities			Taxable fixed maturities - separate accounts			States, municipalities and political subdivisions fixed maturities		Nonredeemable preferred equities		Total
Beginning balance, July 1, 2017	$	1		$	—		$	5	$	—	$	6
Total gains or losses (realized/unrealized):
Included in net income	—			—			—		—		—
Included in other comprehensive income	—			—			—		—		—
Purchases	—			—			—		—		—
Sales	—			—			—		—		—
Transfers into Level 3	—			—			—		—		—
Transfers out of Level 3	—			—			—		—		—
Ending balance, September 30, 2017	$	1		$	—		$	5	$	—	$	6
Beginning balance, July 1, 2016	$	52		$	1		$	—	$	—	$	53
Total gains or losses (realized/unrealized):
Included in net income	—			—			—		—		—
Included in other comprehensive income	1			—			—		—		1
Purchases	—			—			—		—		—
Sales	(1		)	—			—		—		(1		)
Transfers into Level 3	—			—			—		—		—
Transfers out of Level 3	(10		)	(1		)	—		—		(11		)
Ending balance, September 30, 2016	$	42		$	—		$	—	$	—	$	42

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The following table provides the change in Level 3 assets for the nine months ended September 30:

(Dollars in millions)	Asset fair value measurements using significant unobservable inputs
		Corporate fixed maturities			Taxable fixed maturities - separate accounts			States, municipalities and political subdivisions fixed maturities		Nonredeemable preferred equities			Total
Beginning balance, January 1, 2017		$	78		$	—		$	—	$	—		$	78
Total gains or losses (realized/unrealized):
Included in net income		—			—			—		—			—
Included in other comprehensive income		—			—			—		—			—
Purchases		—			—			5		—			5
Sales		—			—			—		—			—
Transfers into Level 3		—			—			—		—			—
Transfers out of Level 3		(77		)	—			—		—			(77		)
Ending balance, September 30, 2017		$	1		$	—		$	5	$	—		$	6
Beginning balance, January 1, 2016		$	51		$	1		$	—	$	3		$	55
Total gains or losses (realized/unrealized):
Included in net income		—			—			—		—			—
Included in other comprehensive income		1			—			—		(1		)	—
Purchases		22			—			—		—			22
Sales		(1		)	—			—		(2		)	(3		)
Transfers into Level 3		—			—			—		—			—
Transfers out of Level 3		(31		)	(1		)	—		—			(32		)
Ending balance, September 30, 2016		$	42		$	—		$	—	$	—		$	42

Additional disclosures for the Level 3 category are not material.

Fair Value Disclosures for Assets and Liabilities Not Carried at Fair Value

The disclosures below are presented to provide information about the effects of current market conditions on financial instruments that are not reported at fair value in our condensed consolidated financial statements.

This table summarizes the book value and principal amounts of our long-term debt:

(Dollars in millions)				Book value				Principal amount
Interest rate		Year of  issue		September 30,		December 31,		September 30,		December 31,
				2017		2016		2017		2016
6.900	%	1998	Senior debentures, due 2028	$	26	$	26	$	28	$	28
6.920	%	2005	Senior debentures, due 2028	391		391		391		391
6.125	%	2004	Senior notes, due 2034	370		370		374		374
			Total	$	787	$	787	$	793	$	793

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The following table shows fair values of our note payable and long-term debt:

(Dollars in millions)	Quoted prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)		Total
At September 30, 2017
Note payable	$	—	$	17	$	—	$	17
6.900% senior debentures, due 2028	—		34		—		34
6.920% senior debentures, due 2028	—		503		—		503
6.125% senior notes, due 2034	—		459		—		459
Total	$	—	$	1,013	$	—	$	1,013
At December 31, 2016
Note payable	$	—	$	20	$	—	$	20
6.900% senior debentures, due 2028	—		33		—		33
6.920% senior debentures, due 2028	—		488		—		488
6.125% senior notes, due 2034	—		435		—		435
Total	$	—	$	976	$	—	$	976

The following table shows the fair value of our life policy loans included in other invested assets:

(Dollars in millions)	Quoted prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)		Total
At September 30, 2017
Life policy loans	$	—	$	—	$	41	$	41
At December 31, 2016
Life policy loans	$	—	$	—	$	40	$	40

Outstanding principal and interest for these life policy loans totaled $31 million at September 30, 2017, and December 31, 2016.

The following table shows fair values of our deferred annuities and structured settlements included in life policy and investment contract reserves:

(Dollars in millions)	Quoted prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)		Total
At September 30, 2017
Deferred annuities	$	—	$	—	$	846	$	846
Structured settlements	—		209		—		209
Total	$	—	$	209	$	846	$	1,055
At December 31, 2016
Deferred annuities	$	—	$	—	$	839	$	839
Structured settlements	—		206		—		206
Total	$	—	$	206	$	839	$	1,045

Recorded reserves for the deferred annuities were $844 million and $861 million at September 30, 2017, and December 31, 2016, respectively. Recorded reserves for the structured settlements were $163 million and $170 million at September 30, 2017, and December 31, 2016, respectively.

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NOTE 4 – Property Casualty Loss and Loss Expenses

This table summarizes activity for our consolidated property casualty loss and loss expense reserves:

(Dollars in millions)	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Gross loss and loss expense reserves, beginning   of period	$	5,213		$	4,918		$	5,035		$	4,660
Less reinsurance recoverable	283			310			298			281
Net loss and loss expense reserves, beginning of   period	4,930			4,608			4,737			4,379
Net incurred loss and loss expenses related to:
Current accident year	835			730			2,493			2,261
Prior accident years	(20		)	(40		)	(96		)	(151		)
Total incurred	815			690			2,397			2,110
Net paid loss and loss expenses related to:
Current accident year	411			374			969			848
Prior accident years	314			288			1,145			1,005
Total paid	725			662			2,114			1,853
Net loss and loss expense reserves, end of period	5,020			4,636			5,020			4,636
Plus reinsurance recoverable	280			301			280			301
Gross loss and loss expense reserves, end of   period	$	5,300		$	4,937		$	5,300		$	4,937

We use actuarial methods, models and judgment to estimate, as of a financial statement date, the property casualty loss and loss expense reserves required to pay for and settle all outstanding insured claims, including incurred but not reported (IBNR) claims, as of that date. The actuarial estimate is subject to review and adjustment by an inter-departmental committee that includes actuarial, claims, underwriting, loss prevention and accounting management. This committee is familiar with relevant company and industry business, claims and underwriting trends, as well as general economic and legal trends that could affect future loss and loss expense payments. The amount we will actually have to pay for claims can be highly uncertain. This uncertainty, together with the size of our reserves, makes the loss and loss expense reserves our most significant estimate. The reserve for loss and loss expenses in the condensed consolidated balance sheets also included $50 million at September 30, 2017, and

$54 million at September 30, 2016, for certain life and health loss and loss expense reserves.

For the three months ended September 30, 2017, we experienced $20 million of favorable development on prior accident years, including $18 million of favorable development in commercial lines, $3 million of favorable development in excess and surplus lines and $1 million of adverse development in our reinsurance assumed operations. This included $6 million from favorable development of catastrophe losses for the three months ended September 30, 2017. For the three months ended September 30, 2017, we recognized favorable reserve development of $14 million for the workers' compensation line, $7 million for the commercial property line and $5 million for the other commercial lines due to reduced uncertainty of prior accident year loss and loss adjustment expense for these lines. For the three months ended September 30, 2017, we recognized unfavorable reserve development of $8 million for the commercial auto line.

For the nine months endedSeptember 30, 2017, we experienced $96 million of favorable development on prior accident years, including $55 million of favorable development in commercial lines, $13 million of favorable development in personal lines, $25 million of favorable development in excess and surplus lines and $3 million of favorable development in our reinsurance assumed operations. This included $20 million from favorable development of catastrophe losses for the nine months endedSeptember 30, 2017. For the nine months endedSeptember 30, 2017, we recognized favorable reserve development of $44 million for the workers' compensation line, $21 million for the commercial property line and $25 million for the other commercial lines due to reduced uncertainty of prior accident year loss and loss adjustment expense for these lines. For the nine months endedSeptember 30, 2017, we recognized unfavorable reserve development of $27 million for the commercial auto line and $8 million for the commercial casualty line. The unfavorable reserve development for commercial casualty reflected higher large loss activity than prior year.

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For the three months ended September 30, 2016, we experienced $40 million of favorable development on prior accident years, including $31 million of favorable development in commercial lines, $4 million of adverse development in personal lines, $12 million of favorable development in excess and surplus lines and $1 million of favorable development in our reinsurance assumed operations. We recognized favorable reserve development during the three months ended September 30, 2016, of $16 million for the workers' compensation line, $7 million for commercial casualty line and $11 million for the other commercial lines due to reduced uncertainty of prior accident year loss and loss adjustment expenses for these lines. We recognized unfavorable reserve development during the three months ended September 30, 2016, of $9 million for the personal auto line and $4 million for the commercial auto line. Both lines developed unfavorably due to higher loss cost effects in recent accident years, resulting in an increase of our reserve estimate for claims that have not yet been settled.

For the nine months endedSeptember 30, 2016, we experienced $151 million of favorable development on prior accident years, including $118 million of favorable development in commercial lines, $4 million of favorable development in personal lines, $27 million of favorable development in excess and surplus lines and $2 million of favorable development in our reinsurance assumed operations. This included $5 million from favorable development of catastrophe losses for the nine months endedSeptember 30, 2016. We recognized favorable reserve development during the nine months endedSeptember 30, 2016, of $52 million for the workers' compensation line, $30 million for the commercial casualty line, $25 million for the commercial property line and $37 million for the other commercial lines due to reduced uncertainty of prior accident year loss and loss adjustment expenses for these lines. We recognized unfavorable reserve development during the nine months ended September 30, 2016, of $26 million for the commercial auto line and $15 million for the personal auto line. Both lines developed unfavorably due to higher loss cost effects in recent accident years, resulting in an increase of our reserve estimate for claims that have not yet settled.

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NOTE 5 – Life Policy and Investment Contract Reserves

We establish the reserves for traditional life insurance policies based on expected expenses, mortality, morbidity, withdrawal rates, timing of claim presentation and investment yields, including a provision for uncertainty. Once these assumptions are established, they generally are maintained throughout the lives of the contracts. We use both our own experience and industry experience, adjusted for historical trends, in arriving at our assumptions for expected mortality, morbidity and withdrawal rates as well as for expected expenses. We base our assumptions for expected investment income on our own experience adjusted for current economic conditions.

We establish reserves for the company’s deferred annuity, universal life and structured settlement policies equal to the cumulative account balances, which include premium deposits plus credited interest less charges and withdrawals. Some of our universal life policies contain no-lapse guarantee provisions. For these policies, we establish a reserve in addition to the account balance, based on expected no-lapse guarantee benefits and expected policy assessments.

This table summarizes our life policy and investment contract reserves:

(Dollars in millions)	September 30, 2017		December 31, 2016
Life policy reserves:
Ordinary/traditional life	$	1,063	$	1,011
Other	46		45
Subtotal	1,109		1,056
Investment contract reserves:
Deferred annuities	844		861
Universal life	594		578
Structured settlements	163		170
Other	6		6
Subtotal	1,607		1,615
Total life policy and investment contract reserves	$	2,716	$	2,671

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NOTE 6 – Deferred Policy Acquisition Costs

Expenses directly related to successfully acquired insurance policies – primarily commissions, premium taxes and underwriting costs – are deferred and amortized over the terms of the policies. We update our acquisition cost assumptions periodically to reflect actual experience, and we evaluate the costs for recoverability. The table below shows the deferred policy acquisition costs and asset reconciliation.

(Dollars in millions)	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Property casualty:
Deferred policy acquisition costs asset, beginning of period	$	448		$	412		$	408		$	388
Capitalized deferred policy acquisition costs	223			216			686			644
Amortized deferred policy acquisition costs	(220		)	(207		)	(643		)	(611		)
Deferred policy acquisition costs asset, end of period	$	451		$	421		$	451		$	421
Life:
Deferred policy acquisition costs asset, beginning of period	$	230		$	212		$	229		$	228
Capitalized deferred policy acquisition costs	13			11			38			35
Amortized deferred policy acquisition costs	(17		)	(15		)	(37		)	(37		)
Amortized shadow deferred policy acquisition costs	(1		)	(2		)	(5		)	(20		)
Deferred policy acquisition costs asset, end of period	$	225		$	206		$	225		$	206
Consolidated:
Deferred policy acquisition costs asset, beginning of period	$	678		$	624		$	637		$	616
Capitalized deferred policy acquisition costs	236			227			724			679
Amortized deferred policy acquisition costs	(237		)	(222		)	(680		)	(648		)
Amortized shadow deferred policy acquisition costs	(1		)	(2		)	(5		)	(20		)
Deferred policy acquisition costs asset, end of period	$	676		$	627		$	676		$	627

No premium deficiencies were recorded in the condensed consolidated statements of income, as the sum of the anticipated loss and loss expenses, policyholder dividends and unamortized deferred acquisition expenses did not exceed the related unearned premiums and anticipated investment income.

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NOTE 7 – Accumulated Other Comprehensive Income

Accumulated other comprehensive income (AOCI) includes changes in unrealized gains and losses on investments, changes in pension obligations and changes in life deferred acquisition costs, life policy reserves and other as follows:

(Dollars in millions)	Three months ended September 30,
	2017									2016
	Before tax			Income tax			Net			Before tax			Income tax			Net
Investments:
AOCI, beginning of period	$	2,977		$	1,031		$	1,946		$	2,673		$	925		$	1,748
OCI before realized gains recognized in net income	193			67			126			119			41			78
Realized gains recognized in net income	(4		)	(1		)	(3		)	(57		)	(20		)	(37		)
OCI	189			66			123			62			21			41
AOCI, end of period	$	3,166		$	1,097		$	2,069		$	2,735		$	946		$	1,789
Pension obligations:
AOCI, beginning of period	$	(25	)	$	(8	)	$	(17	)	$	(40	)	$	(13	)	$	(27	)
OCI excluding amortization recognized in net income	—			—			—			—			—			—
Amortization recognized in net income	1			1			—			—			—			—
OCI	1			1			—			—			—			—
AOCI, end of period	$	(24	)	$	(7	)	$	(17	)	$	(40	)	$	(13	)	$	(27	)
Life deferred acquisition costs, life policy reserves and other:
AOCI, beginning of period	$	(6	)	$	(2	)	$	(4	)	$	(10	)	$	(3	)	$	(7	)
OCI before realized gains and losses recognized in net   income	1			—			1			(4		)	(1		)	(3		)
Realized gains and losses recognized in net income	(3		)	(1		)	(2		)	1			1			—
OCI	(2		)	(1		)	(1		)	(3		)	—			(3		)
AOCI, end of period	$	(8	)	$	(3	)	$	(5	)	$	(13	)	$	(3	)	$	(10	)
Summary of AOCI:
AOCI, beginning of period	$	2,946		$	1,021		$	1,925		$	2,623		$	909		$	1,714
Investments OCI	189			66			123			62			21			41
Pension obligations OCI	1			1			—			—			—			—
Life deferred acquisition costs, life policy reserves and other OCI	(2		)	(1		)	(1		)	(3		)	—			(3		)
Total OCI	188			66			122			59			21			38
AOCI, end of period	$	3,134		$	1,087		$	2,047		$	2,682		$	930		$	1,752

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(Dollars in millions)	Nine months ended September 30,
	2017									2016
	Before tax			Income tax			Net			Before tax			Income tax			Net
Investments:
AOCI, beginning of period	$	2,625		$	908		$	1,717		$	2,094		$	722		$	1,372
OCI before realized gains recognized in net income	694			243			451			801			280			521
Realized gains recognized in net income	(153		)	(54		)	(99		)	(160		)	(56		)	(104		)
OCI	541			189			352			641			224			417
AOCI, end of period	$	3,166		$	1,097		$	2,069		$	2,735		$	946		$	1,789
Pension obligations:
AOCI, beginning of period	$	(26	)	$	(8	)	$	(18	)	$	(42	)	$	(14	)	$	(28	)
OCI excluding amortization recognized in net income	—			—			—			—			—			—
Amortization recognized in net income	2			1			1			2			1			1
OCI	2			1			1			2			1			1
AOCI, end of period	$	(24	)	$	(7	)	$	(17	)	$	(40	)	$	(13	)	$	(27	)
Life deferred acquisition costs, life policy reserves and other:
AOCI, beginning of period	$	(9	)	$	(3	)	$	(6	)	$	1		$	1		$	—
OCI before realized gains and losses recognized in net   income	4			1			3			(13		)	(4		)	(9		)
Realized gains recognized in net income	(3		)	(1		)	(2		)	(1		)	—			(1		)
OCI	1			—			1			(14		)	(4		)	(10		)
AOCI, end of period	$	(8	)	$	(3	)	$	(5	)	$	(13	)	$	(3	)	$	(10	)
Summary of AOCI:
AOCI, beginning of period	$	2,590		$	897		$	1,693		$	2,053		$	709		$	1,344
Investments OCI	541			189			352			641			224			417
Pension obligations OCI	2			1			1			2			1			1
Life deferred acquisition costs, life policy reserves and other OCI	1			—			1			(14		)	(4		)	(10		)
Total OCI	544			190			354			629			221			408
AOCI, end of period	$	3,134		$	1,087		$	2,047		$	2,682		$	930		$	1,752

Investments realized gains and life deferred acquisition costs, life policy reserves and other realized gains are recorded in the realized investment gains, net, line item in the condensed consolidated statements of income. Amortization on pension obligations is recorded in the insurance losses and contract holders' benefits and underwriting, acquisition and insurance expenses in the condensed consolidated statements of income.

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NOTE 8 – Reinsurance

Primary components of our property casualty reinsurance assumed include involuntary and voluntary assumed risks as well as contracts from our reinsurance assumed operations, known as Cincinnati Re. Primary components of our ceded reinsurance include a property per risk treaty, property excess treaty, casualty per occurrence treaty, casualty excess treaty, property catastrophe treaty and catastrophe bonds and retrocessions on our reinsurance assumed operations. Management's decisions about the appropriate level of risk retention are affected by various factors, including changes in our underwriting practices, capacity to retain risks and reinsurance market conditions.

The table below includes our net written consolidated property casualty insurance premiums on assumed and ceded business:

(Dollars in millions)	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Direct written premiums	$	1,221		$	1,189		$	3,712		$	3,561
Assumed written premiums	26			23			101			86
Ceded written premiums	(39		)	(37		)	(103		)	(131		)
Net written premiums	$	1,208		$	1,175		$	3,710		$	3,516

Our condensed consolidated statements of income include earned consolidated property casualty insurance premiums on assumed and ceded business: 

(Dollars in millions)	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Direct earned premiums	$	1,195		$	1,153		$	3,547		$	3,409
Assumed earned premiums	39			22			99			53
Ceded earned premiums	(43		)	(42		)	(123		)	(119		)
Earned premiums	$	1,191		$	1,133		$	3,523		$	3,343

Our condensed consolidated statements of income include incurred consolidated property casualty insurance loss and loss expenses on assumed and ceded business:

(Dollars in millions)	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Direct incurred loss and loss expenses	$	760		$	691		$	2,318		$	2,131
Assumed incurred loss and loss expenses	62			9			97			30
Ceded incurred loss and loss expenses	(7		)	(10		)	(18		)	(51		)
Incurred loss and loss expenses	$	815		$	690		$	2,397		$	2,110

Our life insurance company purchases reinsurance for protection of a portion of the risks that are written. Primary components of our life reinsurance program include individual mortality coverage, aggregate catastrophe and accidental death coverage in excess of certain deductibles.

Our condensed consolidated statements of income include earned life insurance premiums on ceded business: 

(Dollars in millions)	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Direct earned premiums	$	72		$	74		$	223		$	220
Ceded earned premiums	(16		)	(16		)	(50		)	(45		)
Earned premiums	$	56		$	58		$	173		$	175

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Our condensed consolidated statements of income include life insurance contract holders' benefits incurred on ceded business: 

(Dollars in millions)	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Direct contract holders' benefits incurred	$	73		$	72		$	236		$	228
Ceded contract holders' benefits incurred	(14		)	(9		)	(52		)	(40		)
Contract holders' benefits incurred	$	59		$	63		$	184		$	188

The ceded benefits incurred can vary depending on the type of life insurance policy held and the year the policy was issued.

NOTE 9 – Income Taxes

As of September 30, 2017, and December 31, 2016, we had no liability for unrecognized tax benefits.

The differences between the 35 percent statutory federal income tax rate and our effective income tax rate were as follows:

(Dollars in millions)	Three months ended September 30,										Nine months ended September 30,
	2017					2016					2017					2016
Tax at statutory rate:	$	46		35.0	%	$	88		35.0	%	$	187		35.0	%	$	239		35.0	%
Increase (decrease) resulting from:
Tax-exempt income from municipal bonds	(9		)	(7.0	)	(8		)	(3.2	)	(27		)	(5.1	)	(25		)	(3.7	)
Dividend received exclusion	(8		)	(6.2	)	(8		)	(3.2	)	(25		)	(4.7	)	(24		)	(3.5	)
Other	(2		)	(0.9	)	1			0.3		(5		)	(0.8	)	3			0.4
Provision for income taxes	$	27		20.9	%	$	73		28.9	%	$	130		24.4	%	$	193		28.2	%

The provision for federal income taxes is based upon filing a consolidated income tax return for the company and its subsidiaries.

Included in Other above is the adoption of ASU 2016-09, Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting, which decreased both the provision for income taxes and the effective income tax rate by an immaterial amount during the three months ended September 30, 2017, and

$7 million and 1.3 percent, during the nine months ended September 30, 2017.

As of September 30, 2017, we had no operating or capital loss carry forwards.

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NOTE 10 – Net Income Per Common Share

Basic earnings per share are computed based on the weighted average number of common shares outstanding. Diluted earnings per share are computed based on the weighted average number of common and dilutive potential common shares outstanding using the treasury stock method. The table shows calculations for basic and diluted earnings per share:

(In millions except per share data)	Three months ended September 30,				Nine months ended September 30,
	2017		2016		2017		2016
Numerator:
Net income—basic and diluted	$	102	$	180	$	403	$	491
Denominator:
Basic weighted-average common shares   outstanding	164.0		164.6		164.3		164.5
Effect of share-based awards:
Stock options	1.1		1.2		1.1		1.1
Nonvested shares	0.8		1.0		0.7		0.9
Diluted weighted-average shares	165.9		166.8		166.1		166.5
Earnings per share:
Basic	$	0.62	$	1.09	$	2.45	$	2.98
Diluted	0.61		1.08		2.42		2.95
Number of anti-dilutive share-based awards	0.6		—		0.7		0.3

The sources of dilution of our common shares are certain equity-based awards. See our 2016 Annual Report on Form 10-K, Item 8, Note 17, Share-Based Associate Compensation Plans, Page 160, for information about equity-based awards. The above table shows the number of anti-dilutive share-based awards for the three and nine months endedSeptember 30, 2017 and 2016. We did not include these share-based awards in the computation of net income per common share (diluted) because their exercise would have anti-dilutive effects.

NOTE 11 – Employee Retirement Benefits

The following summarizes the components of net periodic benefit cost for our qualified and supplemental pension plans:

(Dollars in millions)	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Service cost	$	3		$	3		$	8		$	8
Interest cost	4			4			11			11
Expected return on plan assets	(6		)	(5		)	(16		)	(14		)
Amortization of actuarial loss and prior service  cost	1			0			2			2
Net periodic benefit cost	$	2		$	2		$	5		$	7

See our 2016 Annual Report on Form 10-K, Item 8, Note 13, Employee Retirement Benefits, Page 155, for information on our retirement benefits. We made matching contributions totaling $4 million and $3 million to our 401(k) and Top Hat savings plans during the third quarter of 2017 and 2016 and contributions of $13 million and

$11 million for the nine months of 2017 and 2016, respectively.

We contributed $5 million to our qualified pension plan during the first nine months of 2017.

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NOTE 12 – Commitments and Contingent Liabilities

In the ordinary course of conducting business, the company and its subsidiaries are named as defendants in various legal proceedings. Most of these proceedings are claims litigation involving the company's insurance subsidiaries in which the company is either defending or providing indemnity for third-party claims brought against insureds or litigating first-party coverage claims. The company accounts for such activity through the establishment of unpaid loss and loss expense reserves. We believe that the ultimate liability, if any, with respect to such ordinary-course claims litigation, after consideration of provisions made for potential losses and costs of defense, is immaterial to our consolidated financial condition, results of operations and cash flows.

The company and its subsidiaries also are occasionally involved in other legal and regulatory proceedings, some of which assert claims for substantial amounts. These actions include, among others, putative class actions seeking certification of a state or national class. Such proceedings have alleged, for example, breach of an alleged duty to search national databases to ascertain unreported deaths of insureds under life insurance policies. The company's insurance subsidiaries also are occasionally parties to individual actions in which extra-contractual damages, punitive damages or penalties are sought, such as claims alleging bad faith handling of insurance claims or writing unauthorized coverage or claims alleging discrimination by former or current associates.

On a quarterly basis, we review these outstanding matters. Under current accounting guidance, we establish accruals when it is probable that a loss has been incurred and we can reasonably estimate its potential exposure. The company accounts for such probable and estimable losses, if any, through the establishment of legal expense reserves. Based on our quarterly review, we believe that our accruals for probable and estimable losses are reasonable and that the amounts accrued do not have a material effect on our consolidated financial condition or results of operations. However, if any one or more of these matters results in a judgment against us or settlement for an amount that is significantly greater than the amount accrued, the resulting liability could have a material effect on the company's consolidated results of operations or cash flows. Based on our most recent review, our estimate of losses for any other matters for which the risk of loss is not probable, but more than remote, is immaterial.

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NOTE 13 – Segment Information

We operate primarily in two industries, property casualty insurance and life insurance. Our chief operating decision maker regularly reviews our reporting segments to make decisions about allocating resources and assessing performance. Our reporting segments are:

• Commercial lines insurance

• Personal lines insurance

• Excess and surplus lines insurance

• Life insurance

• Investments

We report as Other the noninvestment operations of the parent company and its noninsurer subsidiary, CFC Investment Company and Cincinnati Re, our reinsurance assumed operations. See our 2016 Annual Report on Form 10-K, Item 8, Note 18, Segment Information, Page 163, for a description of revenue, income or loss before income taxes and identifiable assets for each of the five segments.

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Segment information is summarized in the following table: 

(Dollars in millions)	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Revenues:
Commercial lines insurance
Commercial casualty	$	268		$	265		$	804		$	785
Commercial property	225			217			674			646
Commercial auto	159			151			472			442
Workers' compensation	84			90			254			268
Other commercial	56			56			165			169
Commercial lines insurance premiums	792			779			2,369			2,310
Fee revenues	1			1			3			3
Total commercial lines insurance	793			780			2,372			2,313
Personal lines insurance
Personal auto	148			137			433			403
Homeowner	131			122			384			362
Other personal	35			34			104			99
Personal lines insurance premiums	314			293			921			864
Fee revenues	1			1			4			3
Total personal lines insurance	315			294			925			867
Excess and surplus lines insurance	53			48			153			136
Fee revenues	—			1			1			1
Total excess and surplus lines insurance	53			49			154			137
Life insurance premiums	56			58			173			175
Fee revenues	1			2			4			4
Total life insurance	57			60			177			179
Investments
Investment income, net of expenses	153			148			453			442
Realized investment gains and losses, net	7			56			156			161
Total investment revenue	160			204			609			603
Other
Cincinnati Re insurance premiums	32			13			80			33
Other	2			2			4			5
Total other revenues	34			15			84			38
Total revenues	$	1,412		$	1,402		$	4,321		$	4,137
Income (loss) before income taxes:
Insurance underwriting results
Commercial lines insurance	$	39		$	72		$	61		$	148
Personal lines insurance	(9		)	(8		)	(48		)	—
Excess and surplus lines insurance	13			20			50			42
Life insurance	(4		)	(4		)	—			(4		)
Investments	136			181			539			536
Other	(46		)	(8		)	(69		)	(38		)
Total income before income taxes	$	129		$	253		$	533		$	684

Identifiable assets:	September 30, 2017		December 31, 2016
Property casualty insurance	$	2,997	$	2,967
Life insurance	1,424		1,366
Investments	16,693		15,569
Other	478		484
Total	$	21,592	$	20,386

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

Results of Operations

The following discussion highlights significant factors influencing the condensed consolidated results of operations and financial position of Cincinnati Financial Corporation. It should be read in conjunction with the consolidated financial statements and related notes included in our 2016 Annual Report on Form 10-K. Unless otherwise noted, the industry data is prepared by A.M. Best Co., a leading insurance industry statistical, analytical and financial strength rating organization. Information from A.M. Best is presented on a statutory basis. When we provide our results on a comparable statutory basis, we label it as such; all other company data is presented in accordance with accounting principles generally accepted in the United States of America (GAAP).

We present per share data on a diluted basis unless otherwise noted, adjusting those amounts for all stock splits and dividends. Dollar amounts are rounded to millions; calculations of percent changes are based on dollar amounts rounded to the nearest million. Certain percentage changes are identified as not meaningful (nm).

SAFE HARBOR STATEMENT

This is our “Safe Harbor” statement under the Private Securities Litigation Reform Act of 1995. Our business is subject to certain risks and uncertainties that may cause actual results to differ materially from those suggested by the forward-looking statements in this report. Some of those risks and uncertainties are discussed in our 2016 Annual Report on Form 10-K, Item 1A, Risk Factors, Page 29.

Factors that could cause or contribute to such differences include, but are not limited to:

• Unusually high levels of catastrophe losses due to risk concentrations, changes in weather patterns, environmental events, terrorism incidents or other causes

• Increased frequency and/or severity of claims or development of claims that are unforeseen at the time of policy issuance

• Inadequate estimates, assumptions or reliance on third-party data used for critical accounting estimates

• Declines in overall stock market values negatively affecting the company’s equity portfolio and book value

• Prolonged low interest rate environment or other factors that limit the company’s ability to generate growth in investment income or interest rate fluctuations that result in declining values of fixed-maturity investments, including declines in accounts in which we hold bank-owned life insurance contract assets

• Domestic and global events resulting in capital market or credit market uncertainty, followed by prolonged periods of economic instability or recession, that lead to:

◦ Significant or prolonged decline in the fair value of a particular security or group of securities and impairment of the asset(s)

◦ Significant decline in investment income due to reduced or eliminated dividend payouts from a particular security or group of securities

◦ Significant rise in losses from surety and director and officer policies written for financial institutions or other insured entities

• Recession or other economic conditions resulting in lower demand for insurance products or increased payment delinquencies

• Difficulties with technology or data security breaches, including cyberattacks, that could negatively affect our ability to conduct business and our relationships with agents, policyholders and others

• Disruption of the insurance market caused by technology innovations such as driverless cars that could decrease consumer demand for insurance products

• Delays, inadequate data developed internally or from third parties, or performance inadequacies from ongoing development and implementation of underwriting and pricing methods, including telematics and other usage-based insurance methods, or technology projects and enhancements expected to increase our pricing accuracy, underwriting profit and competitiveness

• Increased competition that could result in a significant reduction in the company’s premium volume

• Changing consumer insurance-buying habits and consolidation of independent insurance agencies that could alter our competitive advantages

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• Inability to obtain adequate ceded reinsurance on acceptable terms, amount of reinsurance coverage purchased, financial strength of reinsurers and the potential for nonpayment or delay in payment by reinsurers

• Inability to defer policy acquisition costs for any business segment if pricing and loss trends would lead management to conclude that segment could not achieve sustainable profitability

• Inability of our subsidiaries to pay dividends consistent with current or past levels

• Events or conditions that could weaken or harm the company’s relationships with its independent agencies and hamper opportunities to add new agencies, resulting in limitations on the company’s opportunities for growth, such as:

◦ Downgrades of the company’s financial strength ratings

◦ Concerns that doing business with the company is too difficult

◦ Perceptions that the company’s level of service, particularly claims service, is no longer a distinguishing characteristic in the marketplace

◦ Inability or unwillingness to nimbly develop and introduce coverage product updates and innovations that our competitors offer and consumers expect to find in the marketplace

• Actions of insurance departments, state attorneys general or other regulatory agencies, including a change to a federal system of regulation from a state-based system, that:

◦ Impose new obligations on us that increase our expenses or change the assumptions underlying our critical accounting estimates

◦ Place the insurance industry under greater regulatory scrutiny or result in new statutes, rules and regulations

◦ Restrict our ability to exit or reduce writings of unprofitable coverages or lines of business

◦ Add assessments for guaranty funds, other insurance‑related assessments or mandatory reinsurance arrangements; or that impair our ability to recover such assessments through future surcharges or other rate changes

◦ Increase our provision for federal income taxes due to changes in tax law

◦ Increase our other expenses

◦ Limit our ability to set fair, adequate and reasonable rates

◦ Place us at a disadvantage in the marketplace

◦ Restrict our ability to execute our business model, including the way we compensate agents

• Adverse outcomes from litigation or administrative proceedings

• Events or actions, including unauthorized intentional circumvention of controls, that reduce the company’s future ability to maintain effective internal control over financial reporting under the Sarbanes-Oxley Act of 2002

• Unforeseen departure of certain executive officers or other key employees due to retirement, health or other causes that could interrupt progress toward important strategic goals or diminish the effectiveness of certain longstanding relationships with insurance agents and others

• Events, such as an epidemic, natural catastrophe or terrorism, that could hamper our ability to assemble our workforce at our headquarters location

Further, the company’s insurance businesses are subject to the effects of changing social, global, economic and regulatory environments. Public and regulatory initiatives have included efforts to adversely influence and restrict premium rates, restrict the ability to cancel policies, impose underwriting standards and expand overall regulation. The company also is subject to public and regulatory initiatives that can affect the market value for its common stock, such as measures affecting corporate financial reporting and governance. The ultimate changes and eventual effects, if any, of these initiatives are uncertain.

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CORPORATE FINANCIAL HIGHLIGHTS

Net Income and Comprehensive Income Data

(Dollars in millions except per share data)	Three months ended September 30,						Nine months ended September 30,
	2017		2016		% Change		2017		2016		% Change
Earned premiums	$	1,247	$	1,191	5		$	3,696	$	3,518	5
Investment income, net of expenses (pretax)	153		148		3		453		442		2
Realized investment gains and losses, net   (pretax)	7		56		nm		156		161		(3	)
Total revenues	1,412		1,402		1		4,321		4,137		4
Net income	102		180		(43	)	403		491		(18	)
Comprehensive income	224		218		3		757		899		(16	)
Net income per share—diluted	0.61		1.08		(44	)	2.42		2.95		(18	)
Cash dividends declared per share	0.50		0.48		4		1.50		1.44		4
Diluted weighted average shares outstanding	165.9		166.8		(1	)	166.1		166.5		0

Total revenues increased for the third quarter of 2017, compared with the same period of 2016, as higher earned premiums offset a reduction in realized investment gains. For the first nine monthsof 2017, compared with the same period a year ago, total revenues also rose, primarily due to higher earned premiums. Premium and investment revenue trends are discussed further in the respective sections of Financial Results.

Realized investment gains and losses are recognized on the sales of investments or as otherwise required by GAAP. We have substantial discretion in the timing of investment sales, and that timing generally is independent of the insurance underwriting process. GAAP also requires us to recognize in net income the gains or losses from certain changes in fair values of securities even though we continue to hold the securities.

Net income for third-quarter of 2017, compared with third-quarter 2016, decreased $78 million primarily due to a $51 million reduction in after-tax property casualty underwriting income and a $32 million decrease in after-tax net realized investment gains and losses. Catastrophe losses, mostly weather related, were $34 million more after taxes and unfavorably affected both net income and property casualty underwriting income. Third-quarter 2017 after-tax investment income in our investments segment results rose $5 million. Life insurance segment results on a pretax basis for the third quarter of 2017 were flat compared with the third quarter of 2016.

For the nine months ended September 30, 2017, net income decreased $88 million compared with the first nine months of 2016, reflecting a $101 million decrease in after-tax property casualty underwriting income and a decrease of $4 million in after-tax net realized investment gains. The property casualty underwriting income decrease included an unfavorable $48 million after-tax effect from higher catastrophe losses. After-tax investment income in our investments segment results for the first nine months of 2017 rose $10 million compared with the same period of 2016. Life insurance segment results on a pretax basis improved by $4 million.

Performance by segment is discussed below in Financial Results. As discussed in our 2016 Annual Report on Form 10-K, Item 7, Factors Influencing Our Future Performance, Page 47, there are several reasons that our performance during 2017 may be below our long-term targets. In that annual report, as part of Financial Results, we also discussed the full-year 2017 outlook for each reporting segment.

The board of directors is committed to rewarding shareholders directly through cash dividends and through share repurchase authorizations. Through 2016, the company had increased the annual cash dividend rate for 56 consecutive years, a record we believe is matched by only seven other publicly traded companies. In January 2017, the board of directors increased the regular quarterly dividend to 50 cents per share, setting the stage for our 57^th consecutive year of increasing cash dividends. During the first nine months of 2017, cash dividends declared by the company increased slightly more than 4 percent compared with the same period of 2016. Our board regularly evaluates relevant factors in decisions related to dividends and share repurchases. The 2017 dividend increase reflected our strong earnings performance and signaled management’s and the board’s positive outlook and confidence in our outstanding capital, liquidity and financial flexibility.

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Balance Sheet Data and Performance Measures

(In millions except share data)	At September 30,			At December 31,
	2017			2016
Total investments	$	16,664		$	15,500
Total assets	21,592			20,386
Short-term debt	17			20
Long-term debt	787			787
Shareholders' equity	7,523			7,060
Book value per share	45.86			42.95
Debt-to-total-capital ratio	9.7		%	10.3		%

Total assets at September 30, 2017, increased 6 percent compared with year-end 2016, and included 8 percent growth in investments that reflected a combination of net purchases and higher fair values for many securities in our portfolio. Shareholders’ equity increased 7 percent, and book value per share also increased 7 percent during the first nine months of 2017. Our debt-to-total-capital ratio (capital is the sum of debt plus shareholders’ equity) was lower than at year-end 2016.

Our value creation ratio is a non-GAAP measure defined below and is our primary performance metric. That ratio was 10.3 percent for the first nine months of 2017, and was less than the same period in 2016 primarily due to less net income before net realized gains and less overall net gains from our investment portfolio. The $2.91 increase in book value per share during the first nine months of 2017 contributed 6.8 percentage points to the value creation ratio, while dividends declared at $1.50 per share contributed 3.5 points. Value creation ratio trends in total and by major components, along with a reconciliation of the non-GAAP measure to comparable GAAP measures, are shown in the tables below.

	Three months ended September 30,				Nine months ended September 30,
	2017		2016		2017		2016
Value creation ratio major components:
Net income before net realized gains	1.3	%	2.1	%	4.3	%	6.0	%
Change in fixed-maturity securities, realized   and unrealized gains	0.1		(0.1	)	1.2		2.9
Change in equity securities, realized and   unrealized gains	1.6		1.2		5.2		5.2
Other	0.1		0.0		(0.4	)	(0.1	)
Value creation ratio	3.1	%	3.2	%	10.3	%	14.0	%

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(Dollars are per share)	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Book value change per share:
End of period book value	$	45.86		$	43.24		$	45.86		$	43.24
Less beginning of period book value	44.97			42.37			42.95			39.20
Change in book value	$	0.89		$	0.87		$	2.91		$	4.04
Change in book value:
Net income before realized gains	$	0.59		$	0.87		$	1.84		$	2.34
Change in fixed-maturity securities, realized   and unrealized gains	0.05			(0.04		)	0.53			1.14
Change in equity securities, realized and   unrealized gains	0.72			0.51			2.23			2.02
Dividend declared to shareholders	(0.50		)	(0.48		)	(1.50		)	(1.44		)
Other	0.03			0.01			(0.19		)	(0.02		)
Change in book value	$	0.89		$	0.87		$	2.91		$	4.04

(Dollars are per share)	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Value creation ratio:
End of period book value	$	45.86		$	43.24		$	45.86		$	43.24
Less beginning of period book value	44.97			42.37			42.95			39.20
Change in book value	0.89			0.87			2.91			4.04
Dividend declared to shareholders	0.50			0.48			1.50			1.44
Total value creation	$	1.39		$	1.35		$	4.41		$	5.48
Value creation ratio from change in book   value*	2.0		%	2.1		%	6.8		%	10.3		%
Value creation ratio from dividends declared to   shareholders**	1.1			1.1			3.5			3.7
Value creation ratio	3.1		%	3.2		%	10.3		%	14.0		%
*Change in book value divided by the beginning of period book value
**Dividend declared to shareholders divided by beginning of period book value

DRIVERS OF LONG-TERM VALUE CREATION

Operating through The Cincinnati Insurance Company, Cincinnati Financial Corporation is one of the 25 largest property casualty insurers in the nation, based on 2016 net written premiums for approximately 2,000 U.S. stock and mutual insurer groups. We market our insurance products through a select group of independent insurance agencies as discussed in our 2016 Annual Report on Form 10-K, Item 1, Our Business and Our Strategy, Page 5. At September 30, 2017, we actively marketed through agencies located in 42 states. We maintain a long-term perspective that guides us in addressing immediate challenges or opportunities while focusing on the major decisions that best position our company for success through all market cycles.

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To measure our long-term progress in creating shareholder value, our value creation ratio is our primary financial performance target. As discussed in our 2016 Annual Report on Form 10-K, Item 7, Executive Summary, Page 43, management believes this non-GAAP measure is a meaningful indicator of our long-term progress in creating shareholder value, is a useful supplement to GAAP information and has three primary performance drivers:

• Premium growth – We believe our agency relationships and initiatives can lead to a property casualty written premium growth rate over any five-year period that exceeds the industry average. For the first nine months of 2017, our consolidated property casualty net written premium year-over-year growth was 6 percent, comparing favorably with the industry’s 4.5 percent growth rate reported by A.M. Best for the first six months of 2017. For the five-year period 2012 through 2016, our growth rate was approximately double that of the industry.

• Combined ratio – We believe our underwriting philosophy and initiatives can generate a GAAP combined ratio over any five-year period that is consistently within the range of 95 percent to 100 percent. For the first nine months of 2017, our GAAP combined ratio was 99.1 percent and our statutory combined ratio was 98.3 percent, both including 9.9 percentage points of current accident year catastrophe losses partially offset by 2.7 percentage points of favorable loss reserve development on prior accident years. Our nine-month statutory combined ratio was lower than the 100.9 percent reported for the industry by A.M. Best for the first six months of 2017.

• Investment contribution – We believe our investment philosophy and initiatives can drive investment income growth and lead to a total return on our equity investment portfolio over a five-year period that exceeds the five-year return of the Standard & Poor’s 500 Index. For the first nine months of 2017, pretax investment income was $453 million, up 2 percent compared with the same period in 2016. We believe our investment portfolio mix provides an appropriate balance of income stability and growth with capital appreciation potential.

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Highlights of Our Strategy and Supporting Initiatives

Management has worked to identify a strategy that can lead to long-term success, with concurrence by the board of directors. Our strategy is intended to position us to compete successfully in the markets we have targeted while appropriately managing risk. Further description of our long-term, proven strategy can be found in our 2016 Annual Report on Form 10-K, Item 1, Our Business and Our Strategy, Page 5. We believe successful implementation of initiatives that support our strategy will help us better serve our agent customers and reduce volatility in our financial results while we also grow earnings and book value over the long term, successfully navigating challenging economic, market or industry pricing cycles.

• Manage insurance profitability – Implementation of these initiatives is intended to enhance underwriting expertise and knowledge, thereby increasing our ability to manage our business while also gaining efficiency. Better profit margins can arise from additional information and more focused action on underperforming product lines, plus pricing capabilities we are expanding through the use of technology and analytics. In addition to enhancing company efficiency, improving internal processes also supports the ability of the independent agencies that represent us to grow profitably by allowing them to serve clients faster and to more efficiently manage agency expenses.

We continue to enhance our property casualty underwriting expertise and to effectively and efficiently underwrite individual policies and process transactions. Ongoing initiatives supporting this work include expanding our pricing and segmentation capabilities through experience and use of predictive analytics and additional data. Our segmentation efforts emphasize identification and retention of insurance policies we believe have relatively stronger pricing, while seeking more aggressive renewal terms and conditions on policies we believe have relatively weaker pricing. In 2017, we continue to improve underwriting and rate adequacy for our commercial auto and personal auto lines of business. Our commercial auto policies that renewed during the first nine months of 2017 experienced an estimated average price increase at percentages in the high-single-digit range, with the third quarter higher than the second quarter. Our personal auto policies that renewed during the first nine months of 2017 averaged an estimated price increase at percentages near the low end of the high-single-digit range.

• Drive premium growth – Implementation of these initiatives is intended to further penetrate each market we serve through our independent agencies. Strategies aimed at specific market opportunities, along with service enhancements, can help our agents grow and increase our share of their business. Premium growth initiatives also include expansion of Cincinnati Re^SM – our reinsurance assumed operation. Diversified growth also may reduce variability of losses from weather-related catastrophes.

We continue to appoint new agencies to develop additional points of distribution. In 2017, we are planning approximately 100 appointments of independent agencies that offer most or all of our property casualty insurance products. During the first nine months of 2017, we appointed 86 new agencies that meet that criteria.

We also plan to appoint additional agencies that focus on high net worth personal lines clients. In 2017, we are targeting the appointment of approximately 100 agencies that market only personal lines products for us. During the first nine months of 2017, we appointed 92 new agencies that meet that criteria.

As of September 30, 2017, a total of 1,704 agency relationships market our property casualty insurance products from 2,237 reporting locations.

We also continue to grow premiums through the disciplined expansion of Cincinnati Re. During the first nine months of 2017, Cincinnati Re contributed $48 million of growth in consolidated property casualty insurance net written premiums.

Financial Strength

An important part of our long-term strategy is financial strength, which is described in our 2016 Annual Report on Form 10-K, Item 1, Our Business and Our Strategy, Financial Strength, Page 7. One aspect of our financial strength is prudent use of reinsurance ceded to help manage financial performance variability due to catastrophe loss experience. A description of how we use reinsurance ceded is included in our 2016 Annual Report on Form 10-K, Item 7, Liquidity and Capital Resources, 2017 Reinsurance Ceded Programs, Page 101. Another aspect of our financial strength is our investment portfolio, which remains well-diversified as discussed in this quarterly report in Item 3, Quantitative and Qualitative Disclosures About Market Risk. Our strong parent-company liquidity and financial strength increase our flexibility to maintain a cash dividend through all periods and to continue to invest in and expand our insurance operations.

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At September 30, 2017, we held $2.515 billion of our cash and invested assets at the parent-company level, of which $2.202 billion, or 87.6 percent, was invested in common stocks, and $234 million, or 9.3 percent, was cash or cash equivalents. Our debt-to-total-capital ratio of 9.7 percent remains well below our target limit. Another important indicator of financial strength is our ratio of property casualty net written premiums to statutory surplus, which was 1.0-to-1 for the 12 months ended September 30, 2017, matching year-end 2016.

Financial strength ratings assigned to us by independent rating firms also are important. In addition to rating our parent company’s senior debt, four firms award insurer financial strength ratings to one or more of our insurance subsidiary companies based on their quantitative and qualitative analyses. These ratings primarily assess an insurer’s ability to meet financial obligations to policyholders and do not necessarily address all of the matters that may be important to investors. Ratings are under continuous review and subject to change or withdrawal at any time by the rating agency. Each rating should be evaluated independently of any other rating; please see each rating agency's website for its most recent report on our ratings.

At October 25, 2017, our insurance subsidiaries continued to be highly rated.

Insurer Financial Strength Ratings
Rating agency	Standard market property casualty insurance subsidiaries			Life insurance  subsidiary			Excess and surplus lines insurance subsidiary			Outlook
			Rating tier			Rating tier			Rating tier
A.M. Best Co. ambest.com	A+	Superior	2 of 16	A	Excellent	3 of 16	A+	Superior	2 of 16	Stable
Fitch Ratings fitchratings.com	A+	Strong	5 of 21	A+	Strong	5 of 21	-	-	-	Stable
Moody's Investors  Service moodys.com	A1	Good	5 of 21	-	-	-	-	-	-	Stable
S&P Global  Ratings spratings.com	A+	Strong	5 of 21	A+	Strong	5 of 21	-	-	-	Stable

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CONSOLIDATED PROPERTY CASUALTY INSURANCE HIGHLIGHTS

Consolidated property casualty insurance results include premiums and expenses for our standard market insurance segments (commercial lines and personal lines), our excess and surplus lines segment and our reinsurance assumed operations.

(Dollars in millions)	Three months ended September 30,								Nine months ended September 30,
	2017			2016			% Change		2017			2016			% Change
Earned premiums	$	1,191		$	1,133		5		$	3,523		$	3,343		5
Fee revenues	2			3			(33	)	8			7			14
Total revenues	1,193			1,136			5		3,531			3,350			5
Loss and loss expenses from:
Current accident year before catastrophe losses	721			676			7		2,144			2,001			7
Current accident year catastrophe losses	114			54			111		349			260			34
Prior accident years before catastrophe losses	(14		)	(42		)	67		(76		)	(146		)	48
Prior accident years catastrophe losses	(6		)	2			nm		(20		)	(5		)	(300	)
Loss and loss expenses	815			690			18		2,397			2,110			14
Underwriting expenses	367			356			3		1,094			1,044			5
Underwriting profit	$	11		$	90		(88	)	$	40		$	196		(80	)
Ratios as a percent of earned premiums:							Pt. Change								Pt. Change
Current accident year before catastrophe losses	60.4		%	59.8		%	0.6		60.8		%	59.9		%	0.9
Current accident year catastrophe losses	9.6			4.7			4.9		9.9			7.8			2.1
Prior accident years before catastrophe losses	(1.1		)	(3.7		)	2.6		(2.1		)	(4.4		)	2.3
Prior accident years catastrophe losses	(0.5		)	0.2			(0.7	)	(0.6		)	(0.2		)	(0.4	)
Loss and loss expenses	68.4			61.0			7.4		68.0			63.1			4.9
Underwriting expenses	30.9			31.4			(0.5	)	31.1			31.3			(0.2	)
Combined ratio	99.3		%	92.4		%	6.9		99.1		%	94.4		%	4.7
Combined ratio	99.3		%	92.4		%	6.9		99.1		%	94.4		%	4.7
Contribution from catastrophe losses and prior   years reserve development	8.0			1.2			6.8		7.2			3.2			4.0
Combined ratio before catastrophe losses and   prior years reserve development	91.3		%	91.2		%	0.1		91.9		%	91.2		%	0.7

Our consolidated property casualty insurance operations generated an underwriting profit of $11 million and $40 million for the three and nine months ended September 30, 2017. The three-month decrease of $79 million, compared with the same period of 2016, was largely due to an increase of $52 million in losses from natural catastrophes that were mostly weather related. The nine-month decrease of $156 million, compared with the first nine months of 2016, included an increase of $74 million in losses from natural catastrophes. Both 2017 periods also experienced lower amounts of favorable reserve development on prior accident years. We believe future property casualty underwriting results will continue to benefit from price increases and our ongoing initiatives to improve pricing precision and loss experience related to claims and loss control practices.

For all property casualty lines of business in aggregate, net loss and loss expense reserves at September 30, 2017, were $284 million higher than at year-end 2016, including $123 million for the incurred but not reported (IBNR) portion. The $284 million reserve increase raised year-end 2016 net loss and loss expense reserves by 6 percent.

We measure and analyze property casualty underwriting results primarily by the combined ratio and its component ratios. The GAAP-basis combined ratio is the percentage of incurred losses plus all expenses per each earned premium dollar – the lower the ratio, the better the performance. An underwriting profit results when the combined ratio is below 100 percent. A combined ratio above 100 percent indicates that an insurance company’s losses and expenses exceeded premiums.

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Our consolidated property casualty combined ratio for the third quarter of 2017 rose 6.9 percentage points, compared with the same period of 2016, including 4.2 points from higher catastrophe losses and loss expenses. For the first nine months of 2017, compared with the same period of 2016, our consolidated property casualty combined ratio rose 4.7 percentage points, including 1.7 points from higher catastrophe losses and loss expenses.

The combined ratio can be affected significantly by natural catastrophe losses and other large losses as discussed in detail below. The combined ratio can also be affected by updated estimates of loss and loss expense reserves established for claims that occurred in prior periods, referred to as prior accident years. Net favorable development on prior accident year reserves, including reserves for catastrophe losses, benefited the combined ratio by 2.7 percentage points in the first nine months of 2017, compared with 4.6 percentage points in the same period of 2016. Net favorable development is discussed in further detail in Financial Results by property casualty insurance segment.

The ratio for current accident year loss and loss expenses before catastrophe losses rose in the first nine months of 2017. That 60.8 percent ratio increased 0.9 percentage points compared with the 59.9 percent accident year 2016 ratio measured as of September 30, 2016, including an increase of 0.7 percentage points in the ratio for large losses of $1 million or more per claim, discussed below.

The underwriting expense ratio for the third quarter and first nine months of 2017 decreased, compared with the same periods of 2016. Strategic investments that include enhancement of underwriting expertise were offset by the favorable effects of higher earned premiums and ongoing expense management efforts.

Consolidated Property Casualty Insurance Premiums

(Dollars in millions)	Three months ended September 30,								Nine months ended September 30,
	2017			2016			% Change		2017			2016			% Change
Agency renewal written premiums	$	1,064		$	1,036		3		$	3,211		$	3,121		3
Agency new business written premiums	157			149			5		475			417			14
Cincinnati Re net written premiums	24			21			14		104			56			86
Other written premiums	(37		)	(31		)	(19	)	(80		)	(78		)	(3	)
Net written premiums	1,208			1,175			3		3,710			3,516			6
Unearned premium change	(17		)	(42		)	60		(187		)	(173		)	(8	)
Earned premiums	$	1,191		$	1,133		5		$	3,523		$	3,343		5

The trends in net written premiums and earned premiums summarized in the table above include the effects of price increases. Price change trends that heavily influence renewal written premium increases or decreases, along with other premium growth drivers for 2017, are discussed in more detail by segment below in Financial Results.

Consolidated property casualty net written premiums for the three and nine months ended September 30, 2017, grew $33 million and $194 million compared with the same periods of 2016. Each of our property casualty segments continued to grow during the third quarter and first nine months of 2017. Our premium growth initiatives from prior years have provided an ongoing favorable effect on growth during the current year, particularly as newer agency relationships mature over time.

Consolidated property casualty agency new business written premiums rose $8 million and $58 million for the third quarter and first nine months of 2017, compared with the same periods of 2016. New business written premiums in the first nine months of 2017 were higher than the same period of 2016 for each of our property casualty insurance segments. New agency appointments during 2016 and 2017 produced a $44 million increase in standard lines new business for the first nine months of 2017 compared with the same period of 2016. As we appoint new agencies that choose to move accounts to us, we report these accounts as new business. While this business is new to us, in many cases it is not new to the agent. We believe these seasoned accounts tend to be priced more accurately than business that may be less familiar to our agent upon obtaining it from a competing agent.

Net written premiums for Cincinnati Re increased $3 million and $48 million for the third quarter and first nine months of 2017, compared with the same periods of 2016. Cincinnati Re assumes risks through reinsurance treaties and in some cases cedes part of the risk and related premiums to one or more unaffiliated reinsurance

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companies through transactions known as retrocessions. For the first nine months of 2017, earned premiums for Cincinnati Re totaled $80 million, compared with $33 million earned in the same period a year ago.

Other written premiums include premiums ceded to reinsurers as part of our reinsurance ceded program. Those ceded premium totals for the third quarter and first nine months of 2017 were substantially similar to the same periods of 2016.

Catastrophe losses and loss expenses typically have a material effect on property casualty results and can vary significantly from period to period. Losses from natural catastrophes contributed 9.1 and 9.3 percentage points to the combined ratio in the third quarter and first nine months of 2017, respectively, compared with 4.9 and 7.6 percentage points in the same periods of 2016. Some of those losses were applicable to annual loss deductible provisions of our collateralized reinsurance funded through catastrophe bonds. For our collateralized reinsurance arrangement that became effective in January 2017, we can recover catastrophe bond funds if aggregate losses, after the $8 million per occurrence deductible, exceed $190 million during an annual coverage period. Aggregate losses from 10 events between January 23 and September 30, 2017, which occurred within the specific geographic locations included in the severe convective storm portion of our coverage, totaled $135 million, after our per occurrence deductible. The following table shows consolidated property casualty insurance catastrophe losses and loss expenses incurred, net of reinsurance, as well as the effect of loss development on prior period catastrophe events. We individually list declared catastrophe events for which our incurred losses reached or exceeded $10 million.

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Consolidated Property Casualty Insurance Catastrophe Losses and Loss Expenses Incurred

(Dollars in millions, net of reinsurance)		Three months ended September 30,													Nine months ended September 30,
		Comm.			Pers.			E&S		Cin.					Comm.			Pers.			E&S		Cin.
Dates	Region	lines			lines			lines		Re		Total			lines			lines			lines		Re			Total
2017
Feb. 28- Mar. 1	Midwest, South	$	(2	)	$	1		$	—	$	—	$	(1	)	$	19		$	23		$	1	$	—		$	43
Mar. 6-9	Midwest, Northeast, South	—			—			—		—		—			25			11			—		—			36
Mar. 21-22	South	(3		)	1			—		—		(2		)	19			10			—		—			29
Apr. 4-6	Midwest, South	1			2			—		—		3			8			14			—		—			22
Apr. 28- May 1	Midwest, Northeast, South	1			—			—		—		1			5			5			—		—			10
May 8-11	Midwest, South, West	—			—			—		—		—			14			—			—		—			14
May 15-18	Midwest, Northeast, South	—			2			—		—		2			3			9			—		—			12
Jun. 11	Midwest	—			2			—		—		2			4			14			—		—			18
Jun. 16-19	Midwest, Northeast, South	—			1			—		—		1			7			4			—		—			11
Jun. 27-29	Midwest	16			—			—				16			18			1			—		—			19
Aug. 25- Sep. 1	South	4			3			—		12		19			4			3			—		12			19
Sep. 6-12	International, South	14			21			1		25		61			14			21			1		25			61
All other 2017 catastrophes		2			4			—		6		12			31			18			—		6			55
Development on 2016 and prior catastrophes		(4		)	(2		)	—		—		(6		)	(15		)	(4		)	—		(1		)	(20		)
Calendar year incurred total		$	29		$	35		$	1	$	43	$	108		$	156		$	129		$	2	$	42		$	329
2016
Apr. 2-3	Midwest, Northeast, South	$	—		$	—		$	—	$	—	$	—		$	6		$	6		$	—	$	—		$	12
Apr. 10-15	South	—			—			—		—		—			55			—			1		—			56
Apr. 25-28	Midwest, South	—			—			—		—		—			8			4			—		—			12
Apr. 29- May 3	Midwest, South	1			1			—		—		2			19			8			—		—			27
May 7-10	Midwest, South, West	3			5			—		—		8			17			11			—		—			28
May 11-12	Midwest, South	(1		)	1			—		—		—			10			2			—		—			12
May 21-28	Midwest, South, West	1			—			—		—		1			12			3			—		—			15
Jul. 28-29	West	11			—			—		—		11			11			—			—		—			11
Sep. 19-23	Midwest	1			10			—		—		11			1			10			—		—			11
All other 2016 catastrophes		11			10			—		—		21			47			28			1		—			76
Development on 2015 and prior catastrophes		4			(2		)	—		—		2			(2		)	(3		)	—		—			(5		)
Calendar year incurred total		$	31		$	25		$	—	$	—	$	56		$	184		$	69		$	2	$	—		$	255

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The following table includes data for losses incurred of $1 million or more per claim, net of reinsurance.

Consolidated Property Casualty Insurance Losses Incurred by Size

(Dollars in millions, net of reinsurance)	Three months ended September 30,								Nine months ended September 30,
	2017			2016			% Change		2017			2016			% Change
Current accident year losses greater than $5   million	$	6		$	10		(40	)	$	34		$	33		3
Current accident year losses $1 million - $5   million	75			46			63		152			122			25
Large loss prior accident year reserve   development	4			1			300		42			4			nm
Total large losses incurred	85			57			49		228			159			43
Losses incurred but not reported	(9		)	(7		)	29		(6		)	100			nm
Other losses excluding catastrophe losses	499			467			7		1,453			1,269			14
Catastrophe losses	104			53			96		319			249			28
Total losses incurred	$	679		$	570		19		$	1,994		$	1,777		12
Ratios as a percent of earned premiums:							Pt. Change								Pt. Change
Current accident year losses greater than $5   million	0.5		%	0.9		%	(0.4	)	1.0		%	1.0		%	0.0
Current accident year losses $1 million - $5   million	6.4			4.1			2.3		4.3			3.6			0.7
Large loss prior accident year reserve   development	0.3			0.2			0.1		1.2			0.1			1.1
Total large loss ratio	7.2			5.2			2.0		6.5			4.7			1.8
Losses incurred but not reported	(0.7		)	(0.7		)	0.0		(0.2		)	3.0			(3.2	)
Other losses excluding catastrophe losses	41.7			41.3			0.4		41.2			38.1			3.1
Catastrophe losses	8.8			4.7			4.1		9.1			7.4			1.7
Total loss ratio	57.0		%	50.5		%	6.5		56.6		%	53.2		%	3.4

We believe the inherent variability of aggregate loss experience for our portfolio of larger policies is greater than that of our portfolio of smaller policies, and we continue to monitor the variability in addition to general inflationary trends in loss costs. Our analysis continues to indicate no unexpected concentration of large losses and case reserve increases by risk category, geographic region, policy inception, agency or field marketing territory. The third-quarter 2017 property casualty total large losses incurred of $85 million, net of reinsurance, were higher than the $51 million quarterly average during full-year 2016 and higher than the $57 million experienced for the third quarter of 2016. The ratio for these large losses was 2.0 percentage points higher compared with last year’s third quarter. The third-quarter 2017 amount of total large losses incurred helped contribute to the increase in the nine-month 2017 total large loss ratio, compared with 2016, in addition to a first-half 2017 ratio that was 1.5 points higher than the first half of 2016. We believe results for the three-month and nine-month periods largely reflected normal fluctuations in loss patterns and normal variability in large case reserves for claims above $1 million. Losses by size are discussed in further detail in results of operations by property casualty insurance segment.

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FINANCIAL RESULTS

Consolidated results reflect the operating results of each of our five segments along with the parent company, Cincinnati Re and other activities reported as “Other.” The five segments are:

• Commercial lines property casualty insurance

• Personal lines property casualty insurance

• Excess and surplus lines property casualty insurance

• Life insurance

• Investments

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COMMERCIAL LINES INSURANCE RESULTS

(Dollars in millions)	Three months ended September 30,								Nine months ended September 30,
	2017			2016			% Change		2017			2016			% Change
Earned premiums	$	792		$	779		2		$	2,369		$	2,310		3
Fee revenues	1			1			0		3			3			0
Total revenues	793			780			2		2,372			2,313			3
Loss and loss expenses from:
Current accident year before catastrophe losses	486			460			6		1,439			1,357			6
Current accident year catastrophe losses	33			27			22		171			186			(8	)
Prior accident years before catastrophe losses	(14		)	(35		)	60		(40		)	(116		)	66
Prior accident years catastrophe losses	(4		)	4			nm		(15		)	(2		)	(650	)
Loss and loss expenses	501			456			10		1,555			1,425			9
Underwriting expenses	253			252			0		756			740			2
Underwriting profit	$	39		$	72		(46	)	$	61		$	148		(59	)
Ratios as a percent of earned premiums:							Pt. Change								Pt. Change
Current accident year before catastrophe losses	61.3		%	59.1		%	2.2		60.7		%	58.7		%	2.0
Current accident year catastrophe losses	4.3			3.5			0.8		7.2			8.1			(0.9	)
Prior accident years before catastrophe losses	(1.8		)	(4.5		)	2.7		(1.6		)	(5.0		)	3.4
Prior accident years catastrophe losses	(0.5		)	0.4			(0.9	)	(0.6		)	(0.1		)	(0.5	)
Loss and loss expenses	63.3			58.5			4.8		65.7			61.7			4.0
Underwriting expenses	31.9			32.3			(0.4	)	31.9			32.0			(0.1	)
Combined ratio	95.2		%	90.8		%	4.4		97.6		%	93.7		%	3.9
Combined ratio	95.2		%	90.8		%	4.4		97.6		%	93.7		%	3.9
Contribution from catastrophe losses and prior   years reserve development	2.0			(0.6		)	2.6		5.0			3.0			2.0
Combined ratio before catastrophe losses and   prior years reserve development	93.2		%	91.4		%	1.8		92.6		%	90.7		%	1.9

Overview

Performance highlights for the commercial lines segment include:

• Premiums – Earned premiums and net written premiums for the commercial lines segment grew during the third quarter and first nine months of 2017, in part due to renewal premium growth that continued to reflect price increases and a higher level of insured exposures. Higher new business written premiums also contributed to the increase in net written premiums for the nine months ended September 30, 2017. The table below analyzes the primary components of premiums. We continue using predictive analytics tools to improve pricing precision and segmentation while also leveraging our local relationships with agents through the efforts of our teams that work closely with them. We seek to maintain appropriate pricing discipline for both new and renewal business as our agents and underwriters assess account quality to make careful decisions on a case-by-case basis whether to write or renew a policy.

Agency renewal written premiums grew 1 percent during third-quarter 2017 and 2 percent during the nine months ended September 30, 2017, compared with the same periods of 2016. The growth reflected price increases and improving economic conditions. During the third quarter of 2017, our overall standard commercial lines policies continued to average estimated renewal price increases at percentages in the low-single-digit range, similar to the second quarter of 2017. We continue to segment commercial lines policies, emphasizing identification and retention of policies we believe have relatively stronger pricing. Conversely, we have been seeking stricter renewal terms and conditions on policies we believe have relatively weaker pricing, in turn retaining fewer of those policies. We measure average changes in commercial lines renewal pricing as the percentage rate of change in renewal premium for the new policy period compared with the premium for the expiring policy period, assuming no change in the level of insured exposures or policy coverage between those periods for the respective policies.

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Our average overall commercial lines renewal pricing change includes the impact of flat pricing for certain coverages within package policies written for a three-year term that were in force but did not expire during the period being measured. Therefore, the change in average commercial lines renewal pricing we report reflectsa blend of three-year policies that did not expire and other policies that did expire during the measurement period. For commercial lines policies that did expire and were then renewed during the third quarter of 2017, we estimate that our average percentage price increase for commercial auto continued in the high-single-digit range, higher in that range than second-quarter 2017. The estimated average percentage price change for our commercial property line of business was an increase in the mid-single-digit range and for commercial casualty it was an increase near the low end of the low-single-digit range. The estimated average percentage price change for workers’ compensation was a decrease in the mid-single-digit range.

Renewal premiums for our commercial casualty and workers’ compensation lines include the results of policy audits that adjust initial premium amounts based on differences between estimated and actual sales or payroll related to a specific policy. Audits completed during the first nine months of 2017 contributed $54 million to net written premiums.

New business written premiums for commercial lines decreased $2 million during the third quarter of 2017 and increased $20 million during the first nine months of 2017, compared with the same periods of 2016. The third-quarter total reflected a modest decrease for each major line of business in our commercial lines insurance segment except commercial property. The nine-month increase reflected growth for each major line of business except workers' compensation, which decreased by approximately $1 million. Trend analysis for year-over-year comparisons of individual quarters are more difficult to assess for commercial lines new business written premiums, due to inherent variability. That variability is often driven by larger policies with annual premiums greater than $100,000.

Other written premiums include premiums ceded to reinsurers as part of our reinsurance ceded program. For our commercial lines insurance segment, ceded premium totals for the third quarter and first nine months of 2017 were similar to the same periods of 2016.

Commercial Lines Insurance Premiums

(Dollars in millions)	Three months ended September 30,								Nine months ended September 30,
	2017			2016			% Change		2017			2016			% Change
Agency renewal written premiums	$	707		$	698		1		$	2,208		$	2,174		2
Agency new business written premiums	99			101			(2	)	301			281			7
Other written premiums	(28		)	(22		)	(27	)	(53		)	(54		)	2
Net written premiums	778			777			0		2,456			2,401			2
Unearned premium change	14			2			nm		(87		)	(91		)	4
Earned premiums	$	792		$	779		2		$	2,369		$	2,310		3

• Combined ratio – The commercial lines combined ratio rose 4.4 percentage points for the third quarter and 3.9 points for the first nine months of 2017, compared with the same periods a year ago, largely due to lower amounts of favorable reserve development on prior accident years, discussed below. In addition, the current accident year loss and loss expenses ratio increased for our commercial casualty line of business, which represents approximately one-third of premiums for our commercial lines insurance segment. Commercial casualty paid losses and loss expenses for the third quarter of 2017 were higher than any quarter since the beginning of 2015, in part due to an increase in large losses discussed below. Although the ratio for our commercial casualty case incurred losses was approximately 2 percentage points better than the first half of 2017, it remained approximately 4 points worse than the average for the prior two years. After considering these trends, we maintained our consistently prudent approach to setting reserves with IBNR reserves that resulted in no favorable development on third-quarter 2017 commercial casualty prior accident year reserves and a nine-month commercial casualty current accident year loss and loss expenses ratio approximately 2 percentage points higher than full-year 2016.

The commercial lines ratio for current accident year loss and loss expenses before catastrophe losses rose in the first nine months of 2017. That 60.7 percent ratio increased 2.0 percentage points compared with the 58.7 percent accident year 2016 ratio measured as of September 30, 2016, including an increase of 0.5 percentage points in the ratio for large losses of $1 million or more per claim, discussed below.

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Catastrophe losses and loss expenses accounted for 3.8 and 6.6 percentage points of the combined ratio for the third quarter and first nine months of 2017, compared with 3.9 and 8.0 percentage points for the same periods a year ago. The 10-year annual average for that catastrophe measure through 2016 for the commercial lines segment was 4.8 percentage points, and the five-year annual average was 5.2 percentage points.

Commercial auto, representing 19 percent of 2016 earned premiums for our commercial lines insurance segment, was the only major line of business in that segment with a third-quarter 2017 total loss and loss expense ratio before catastrophe losses significantly higher than we desired. As discussed above, during the first nine months of 2017, our commercial auto policies experienced average renewal price increases at percentages in the high-single-digit range, with the third quarter higher than the second quarter. We believe pricing and risk selection actions we are taking will help improve future profitability. Further segmentation of policies as they renew should also help improve profitability, as we seek more adequate pricing on individual policies that need it based on analytics and underwriter judgment. As an example, for our 2016 commercial auto policies that we determined have relatively weaker pricing, representing approximately one-third of commercial auto renewal written premiums, we obtained 2016 percentage price increases that averaged in the high-single digits. We also continued to improve premium rate classification and the use of other rating variables in risk selection and pricing.

The net effect of reserve development on prior accident years during the third quarter and first nine months of 2017 was favorable for commercial lines overall by $18 million and $55 million compared with $31 million and $118 million for the same periods in 2016. For the first nine months of 2017, our workers’ compensation line of business was the largest contributor to the total commercial lines net favorable reserve development on prior accident years, followed by other commercial lines, which was largely attributable to director and officer liability insurance. Commercial property also contributed to the total commercial lines net favorable reserve development. Those contributions were partially offset by unfavorable reserve development for our commercial auto and commercial casualty lines of business. The unfavorable reserve development for commercial casualty reflected higher than usual large loss activity for the first and third quarters of 2017. The net favorable reserve development recognized during the first nine months of 2017 for our commercial lines insurance segment was largely for accident year 2016 and accident years prior to 2014, and was primarily due to lower-than-anticipated loss emergence on known claims. Reserve estimates are inherently uncertain as described in our 2016 Annual Report on Form 10-K, Item 7, Critical Accounting Estimates, Property Casualty Insurance Loss and Loss Expense Reserves, Page 48.

The commercial lines underwriting expense ratio for the third quarter and first nine months of 2017 decreased, compared with the same periods of 2016, as earned premiums increased at a faster pace than underwriting expenses.

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Commercial Lines Insurance Losses Incurred by Size

(Dollars in millions, net of reinsurance)	Three months ended September 30,								Nine months ended September 30,
	2017			2016			% Change		2017			2016			% Change
Current accident year losses greater than $5   million	$	6		$	10		(40	)	$	34		$	33		3
Current accident year losses $1 million - $5   million	56			34			65		115			103			12
Large loss prior accident year reserve   development	1			5			(80	)	37			8			nm
Total large losses incurred	63			49			29		186			144			29
Losses incurred but not reported	1			4			(75	)	17			70			(76	)
Other losses excluding catastrophe losses	313			287			9		911			786			16
Catastrophe losses	27			28			(4	)	149			179			(17	)
Total losses incurred	$	404		$	368		10		$	1,263		$	1,179		7
Ratios as a percent of earned premiums:							Pt. Change								Pt. Change
Current accident year losses greater than $5   million	0.8		%	1.3		%	(0.5	)	1.5		%	1.4		%	0.1
Current accident year losses $1 million - $5   million	7.2			4.4			2.8		4.8			4.4			0.4
Large loss prior accident year reserve   development	0.1			0.8			(0.7	)	1.6			0.4			1.2
Total large loss ratio	8.1			6.5			1.6		7.9			6.2			1.7
Losses incurred but not reported	—			0.4			(0.4	)	0.7			3.0			(2.3	)
Other losses excluding catastrophe losses	39.6			36.7			2.9		38.4			34.1			4.3
Catastrophe losses	3.4			3.7			(0.3	)	6.3			7.8			(1.5	)
Total loss ratio	51.1		%	47.3		%	3.8		53.3		%	51.1		%	2.2

We continue to monitor new losses and case reserve increases greater than $1 million for trends in factors such as initial reserve levels, loss cost inflation and claim settlement expenses. Our analysis continues to indicate no unexpected concentration of these large losses and case reserve increases by risk category, geographic region, policy inception, agency or field marketing territory. The third-quarter 2017 commercial lines total large losses incurred of $63 million, net of reinsurance, were higher than the quarterly average of $48 million during full-year 2016 and higher than the $49 million total large losses incurred for the third quarter of 2016. The rise in commercial lines large losses for the third-quarter and first nine months of 2017 was largely due to our commercial casualty and commercial property lines of business. The third-quarter 2017 ratio for commercial lines total large losses was 1.6 percentage points higher compared with last year’s third-quarter ratio. The third-quarter 2017 amount of total large losses incurred helped contribute to the increase in the nine-month 2017 total large loss ratio, compared with 2016, in addition to a first-half 2017 ratio that was 1.6 points higher than the first half of 2016. We believe results for the three- and nine-month periods largely reflected normal fluctuations in loss patterns and normal variability in large case reserves for claims above $1 million.

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PERSONAL LINES INSURANCE RESULTS

(Dollars in millions)	Three months ended September 30,								Nine months ended September 30,
	2017			2016			% Change		2017			2016			% Change
Earned premiums	$	314		$	293		7		$	921		$	864		7
Fee revenues	1			1			0		4			3			33
Total revenues	315			294			7		925			867			7
Loss and loss expenses from:
Current accident year before catastrophe losses	196			186			5		586			546			7
Current accident year catastrophe losses	37			27			37		133			72			85
Prior accident years before catastrophe losses	2			6			(67	)	(9		)	(1		)	(800	)
Prior accident years catastrophe losses	(2		)	(2		)	0		(4		)	(3		)	(33	)
Loss and loss expenses	233			217			7		706			614			15
Underwriting expenses	91			85			7		267			253			6
Underwriting loss	$	(9	)	$	(8	)	13		$	(48	)	$	—		nm
Ratios as a percent of earned premiums:							Pt. Change								Pt. Change
Current accident year before catastrophe losses	62.2		%	63.7		%	(1.5	)	63.6		%	63.2		%	0.4
Current accident year catastrophe losses	11.7			8.9			2.8		14.5			8.3			6.2
Prior accident years before catastrophe losses	0.7			2.1			(1.4	)	(1.0		)	(0.1		)	(0.9	)
Prior accident years catastrophe losses	(0.6		)	(0.5		)	(0.1	)	(0.5		)	(0.3		)	(0.2	)
Loss and loss expenses	74.0			74.2			(0.2	)	76.6			71.1			5.5
Underwriting expenses	29.1			29.2			(0.1	)	29.0			29.3			(0.3	)
Combined ratio	103.1		%	103.4		%	(0.3	)	105.6		%	100.4		%	5.2
Combined ratio	103.1		%	103.4		%	(0.3	)	105.6		%	100.4		%	5.2
Contribution from catastrophe losses and prior   years reserve development	11.8			10.5			1.3		13.0			7.9			5.1
Combined ratio before catastrophe losses and   prior years reserve development	91.3		%	92.9		%	(1.6	)	92.6		%	92.5		%	0.1

Overview

Performance highlights for the personal lines segment include:

• Premiums – Personal lines earned premiums and net written premiums for the third quarter and first nine months of 2017 continued to grow, reflecting increases in renewal written premiums and new business written premiums from agencies that represent us. Price increases and a high level of policy retention were the main drivers of renewal premium growth. The table below analyzes the primary components of premiums.

Agency renewal written premiums increased 5 percent for both the third quarter and first nine months of 2017, largely reflecting rate increases. We estimate that premium rates for our personal auto line of business increased at average percentages near the low end of the high-single-digit range during the first nine months of 2017. For our homeowner line of business, we estimate that premium rates for the first nine months of 2017 increased at average percentages near the low end of the mid-single-digit range. For both our personal auto and homeowner lines of business, some individual policies experienced lower or higher rate changes based on each risk's specific characteristics and enhanced pricing precision enabled by predictive models.

Personal lines new business written premiums grew $11 million or 34 percent during the third quarter and $31 million or 34 percent during the first nine months of 2017, compared with the same periods of 2016. That growth included approximately $9 million for the third quarter, and $22 million for the first nine months of 2017, from high net worth clients of our agencies. Personal lines new business written premiums from our high net worth policies totaled approximately $16 million for the third quarter and $42 million for the first nine months of 2017. The primary factors driving growth in the middle market portion included recent-year expansion into new states and other additional marketing efforts directed toward agencies. Marketing efforts included assisting agencies with processing qualified policies expiring from other insurance companies, sometimes referred to as

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“book rolls”. Similar to recent years, such processing has not materially contributed to 2017 increases or decreases in personal lines new business written premiums.

Other written premiums include premiums ceded to reinsurers as part of our reinsurance ceded program. For our personal lines insurance segment, ceded premium totals for the third quarter and first nine months of 2017 were similar to the same periods of 2016.

We continue to implement strategies discussed in our 2016 Annual Report on Form 10-K, Item 1, Strategic Initiatives, Page 13, to enhance our responsiveness to marketplace changes and to help achieve our long-term objectives for personal lines growth and profitability. These strategies include initiatives to more profitably underwrite personal auto policies.

Personal Lines Insurance Premiums

(Dollars in millions)	Three months ended September 30,								Nine months ended September 30,
	2017			2016			% Change		2017			2016			% Change
Agency renewal written premiums	$	318		$	303		5		$	881		$	841		5
Agency new business written premiums	43			32			34		122			91			34
Other written premiums	(6		)	(6		)	0		(18		)	(17		)	(6	)
Net written premiums	355			329			8		985			915			8
Unearned premium change	(41		)	(36		)	(14	)	(64		)	(51		)	(25	)
Earned premiums	$	314		$	293		7		$	921		$	864		7

• Combined ratio – Our personal lines combined ratio for the third quarter of 2017 decreased 0.3 percentage points, compared with the same period a year ago. For the first nine months of 2017, compared with the same period of 2016, it rose 5.2 percentage points, driven by an increase of 6.0 percentage points in the ratio for weather-related natural catastrophe losses and loss expenses.

The personal lines ratio for current accident year loss and loss expenses before catastrophe losses rose in the first nine months of 2017. That 63.6 percent ratio increased 0.4 percentage points compared with the 63.2 percent accident year 2016 ratio measured as of September 30, 2016, including an increase of 2.2 percentage points in the ratio for large losses of $1 million or more per claim, discussed below.

In addition to the average rate increases discussed above, we continue to refine our pricing to better match premiums to the risk of loss on individual policies. Improved pricing precision and broad-based rate increases are expected to help position the combined ratio at a profitable level over the long term. In addition, greater geographic diversification is expected to reduce the volatility of homeowner loss ratios attributable to weather-related catastrophe losses over time.

Personal auto, representing 47 percent of 2016 earned premiums for our personal lines insurance segment, was the only major line of business in that segment with a third-quarter 2017 total loss and loss expense ratio before catastrophe losses significantly higher than we desired. As discussed above, during the first nine months of 2017, our personal auto policies experienced average renewal price increases at percentages near the low end of the high-single-digit range. We believe rate increases and other actions to improve pricing precision and reduce loss costs will improve future profitability.

Catastrophe losses and loss expenses accounted for 11.1 and 14.0 percentage points of the combined ratio for the third quarter and first nine months of 2017, compared with 8.4 and 8.0 percentage points for the same periods of 2016. The 10-year annual average catastrophe loss ratio through 2016 for the personal lines segment was 10.7 percentage points, and the five-year annual average was 9.3 percentage points.

The net effect of reserve development on prior accident years during the third quarter of 2017 was unfavorable for personal lines overall by less than $1 million, compared with an unfavorable $4 million for the same period in 2016. For the first nine months of 2017, total personal lines net reserve development was favorable by $13 million, compared with a favorable $4 million for the same period in 2016. Our homeowner and other personal lines of business were the largest contributors to the nine-month 2017 total personal lines net favorable reserve development on prior accident years, followed by personal auto. The favorable reserve development was due primarily to lower-than-anticipated loss emergence on known claims. Reserve estimates are inherently uncertain as described in our 2016 Annual Report on Form 10-K, Item 7, Critical Accounting Estimates, Property Casualty Insurance Loss and Loss Expense Reserves, Page 48.

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The underwriting expense ratio decreased slightly for the third quarter and first nine months of 2017, compared with the same periods of 2016, as earned premiums increased at a faster pace than underwriting expenses.

Personal Lines Insurance Losses Incurred by Size

(Dollars in millions, net of reinsurance)	Three months ended September 30,								Nine months ended September 30,
	2017			2016			% Change		2017			2016			% Change
Current accident year losses greater than $5   million	$	—		$	—		nm		$	—		$	—		nm
Current accident year losses $1 million - $5   million	19			10			90		37			16			131
Large loss prior accident year reserve   development	3			(3		)	nm		4			(4		)	nm
Total large losses incurred	22			7			nm		41			12			242
Losses incurred but not reported	(17		)	(9		)	89		(19		)	25			nm
Other losses excluding catastrophe losses	164			168			(2	)	472			442			7
Catastrophe losses	34			25			36		127			68			87
Total losses incurred	$	203		$	191		6		$	621		$	547		14
Ratios as a percent of earned premiums:							Pt. Change								Pt. Change
Current accident year losses greater than $5   million	—		%	—		%	0.0		—		%	—		%	0.0
Current accident year losses $1 million - $5   million	6.0			3.5			2.5		4.0			1.8			2.2
Large loss prior accident year reserve   development	1.0			(1.1		)	2.1		0.4			(0.4		)	0.8
Total large loss ratio	7.0			2.4			4.6		4.4			1.4			3.0
Losses incurred but not reported	(5.3		)	(3.2		)	(2.1	)	(2.1		)	2.9			(5.0	)
Other losses excluding catastrophe losses	52.1			57.7			(5.6	)	51.3			51.2			0.1
Catastrophe losses	10.8			8.2			2.6		13.8			7.8			6.0
Total loss ratio	64.6		%	65.1		%	(0.5	)	67.4		%	63.3		%	4.1

We continue to monitor new losses and case reserve increases greater than $1 million for trends in factors such as initial reserve levels, loss cost inflation and claim settlement expenses. Our analysis continues to indicate no unexpected concentration of these large losses and case reserve increases by risk category, geographic region, policy inception, agency or field marketing territory. In the third quarter of 2017, the personal lines total large loss ratio, net of reinsurance, was 4.6 percentage points higher than last year’s third quarter. The rise in personal lines large losses for the third-quarter and first nine months of 2017 was largely due to our homeowner line of business. The third-quarter 2017 amount of total large losses incurred helped contribute to the increase in the nine-month 2017 total large loss ratio, compared with 2016, in addition to a first-half 2017 ratio that was 2.2 points higher than the first half of 2016. We believe results for the three-month and nine-month periods largely reflected normal fluctuations in loss patterns and normal variability in large case reserves for claims above $1 million.

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EXCESS AND SURPLUS LINES INSURANCE RESULTS

(Dollars in millions)	Three months ended September 30,								Nine months ended September 30,
	2017			2016			% Change		2017			2016			% Change
Earned premiums	$	53		$	48		10		$	153		$	136		13
Fee revenues	—			1			nm		1			1			0
Total revenues	53			49			8		154			137			12
Loss and loss expenses from:
Current accident year before catastrophe losses	26			27			(4	)	81			80			1
Current accident year catastrophe losses	1			—			nm		2			2			0
Prior accident years before catastrophe losses	(3		)	(12		)	(75	)	(25		)	(27		)	7
Prior accident years catastrophe losses	—			—			0		—			—			0
Loss and loss expenses	24			15			60		58			55			5
Underwriting expenses	16			14			14		46			40			15
Underwriting profit	$	13		$	20		(35	)	$	50		$	42		19
Ratios as a percent of earned premiums:							Pt. Change								Pt. Change
Current accident year before catastrophe losses	49.1		%	57.2		%	(8.1	)	52.8		%	58.9		%	(6.1	)
Current accident year catastrophe losses	1.7			0.2			1.5		1.3			1.3			0.0
Prior accident years before catastrophe losses	(4.7		)	(25.5		)	20.8		(15.9		)	(19.6		)	3.7
Prior accident years catastrophe losses	(0.3		)	0.0			(0.3	)	(0.1		)	(0.1		)	0.0
Loss and loss expenses	45.8			31.9			13.9		38.1			40.5			(2.4	)
Underwriting expenses	29.0			29.4			(0.4	)	29.9			29.4			0.5
Combined ratio	74.8		%	61.3		%	13.5		68.0		%	69.9		%	(1.9	)
Combined ratio	74.8		%	61.3		%	13.5		68.0		%	69.9		%	(1.9	)
Contribution from catastrophe losses and prior   years reserve development	(3.3		)	(25.3		)	22.0		(14.7		)	(18.4		)	3.7
Combined ratio before catastrophe losses and   prior years reserve development	78.1		%	86.6		%	(8.5	)	82.7		%	88.3		%	(5.6	)

Overview

Performance highlights for the excess and surplus lines segment include:

• Premiums – Excess and surplus lines net written premiums continued to grow, primarily due to increases in renewal written premiums, during the third quarter and first nine months of 2017.

Renewal written premiums rose 11 percent and 15 percent for the three and nine months ended September 30, 2017, compared with the same periods of 2016, reflecting the opportunity to renew many accounts for the first time, as well as higher renewal pricing. For the first nine months of 2017, excess and surplus lines policy renewals experienced estimated average price increases at percentages in the low-single-digit range. We measure average changes in excess and surplus lines renewal pricing as the percentage rate of change in renewal premium for the new policy period compared with the premium for the expiring policy period, assuming no change in the level of insured exposures or policy coverage between those periods for respective policies.

New business written premiums produced by agencies increased 16 percent for the first nine months of 2017, compared with the same period of 2016, reflecting an increase in our marketing efforts as we continued to carefully underwrite each policy in a highly competitive market. Some of what we report as new business came from accounts that were not new to our agents. We believe our agents’ seasoned accounts tend to be priced more accurately than business that may be less familiar to them.

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Excess and Surplus Lines Insurance Premiums

(Dollars in millions)	Three months ended September 30,								Nine months ended September 30,
	2017			2016			% Change		2017			2016			% Change
Agency renewal written premiums	$	39		$	35		11		$	122		$	106		15
Agency new business written premiums	15			16			(6	)	52			45			16
Other written premiums	(3		)	(3		)	0		(9		)	(7		)	(29	)
Net written premiums	51			48			6		165			144			15
Unearned premium change	2			—			nm		(12		)	(8		)	(50	)
Earned premiums	$	53		$	48		10		$	153		$	136		13

• Combined ratio – The excess and surplus lines combined ratio increased by 13.5 percentage points for the third quarter of 2017, compared with the same period of 2016, primarily due to less favorable reserve development on prior accident years. For the first nine months of 2017, the combined ratio improved by 1.9 percentage points, compared with the first nine months of 2016, driven by a lower ratio for current accident year losses and loss expenses before catastrophe losses.

The excess and surplus lines ratio for current accident year loss and loss expenses before catastrophe losses improved in the first nine months of 2017. That 52.8 percent ratio decreased 6.1 percentage points compared with the 58.9 percent accident year 2016 ratio measured as of September 30, 2016, including a decrease of 2.3 percentage points in the ratio for large losses of $1 million or more per claim, discussed below.

Excess and surplus lines net favorable reserve development on prior accident years, as a ratio to earned premiums, was 5.0 percent and 16.0 percent for the third quarter and first nine months of 2017, compared with 25.5 percent and 19.7 percent for the same periods of 2016. Approximately two-thirds of the net favorable reserve development recognized during the first nine months of 2017 was attributable to accident years 2015 and 2014. The favorable reserve development was due primarily to lower-than-anticipated loss emergence on known claims. Reserve estimates are inherently uncertain as described in our 2016 Annual Report on Form 10-K, Item 7, Critical Accounting Estimates, Property Casualty Insurance Loss and Loss Expense Reserves, Page 48.

The underwriting expense ratio for the third quarter of 2017 decreased, compared with the same period of 2016, reflecting higher earned premiums, ongoing expense management efforts and a lower level of profit-sharing commissions for agencies. For the first nine months of 2017, the underwriting expense ratio increased, compared with the same period of 2016, primarily due to strategic investments that include enhancement of underwriting expertise, such as upgrades to systems used in underwriting or billing excess and surplus lines insurance policies.

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Excess and Surplus Lines Insurance Losses Incurred by Size

(Dollars in millions, net of reinsurance)	Three months ended September 30,								Nine months ended September 30,
	2017			2016			% Change		2017			2016			% Change
Current accident year losses greater than $5   million	$	—		$	—		nm		$	—		$	—		nm
Current accident year losses $1 million - $5   million	—			2			(100	)	—			3			(100	)
Large loss prior accident year reserve   development	—			(1		)	nm		1			—			nm
Total large losses incurred	—			1			(100	)	1			3			(67	)
Losses incurred but not reported	7			(2		)	nm		(4		)	5			nm
Other losses excluding catastrophe losses	8			11			(27	)	35			25			40
Catastrophe losses	1			—			nm		2			2			—
Total losses incurred	$	16		$	10		60		$	34		$	35		(3	)
Ratios as a percent of earned premiums:							Pt. Change								Pt. Change
Current accident year losses greater than $5   million	—		%	—		%	0.0		—		%	—		%	0.0
Current accident year losses $1 million - $5   million	—			4.4			(4.4	)	—			2.3			(2.3	)
Large loss prior accident year reserve   development	(0.3		)	(2.0		)	1.7		0.6			(0.3		)	0.9
Total large loss ratio	(0.3		)	2.4			(2.7	)	0.6			2.0			(1.4	)
Losses incurred but not reported	13.8			(2.9		)	16.7		(2.4		)	4.1			(6.5	)
Other losses excluding catastrophe losses	15.3			21.8			(6.5	)	23.1			18.4			4.7
Catastrophe losses	1.3			0.1			1.2		1.1			1.1			0.0
Total loss ratio	30.1		%	21.4		%	8.7		22.4		%	25.6		%	(3.2	)

We continue to monitor new losses and case reserve increases greater than $1 million for trends in factors such as initial reserve levels, loss cost inflation and claim settlement expenses. Our analysis continues to indicate no unexpected concentration of these large losses and case reserve increases by risk category, geographic region, policy inception, agency or field marketing territory. In the third quarter of 2017, the excess and surplus lines total ratio for large losses, net of reinsurance, was 2.7 percentage points lower than last year’s third quarter. The third-quarter 2017 amount of total large losses incurred helped contribute to the decrease in the nine-month 2017 total large loss ratio, compared with 2016, in addition to a first-half 2017 ratio that was 0.7 points lower than the first half of 2016. We believe results for the three-month and nine-month periods largely reflected normal fluctuations in loss patterns and normal variability in large case reserves for claims above $1 million.

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LIFE INSURANCE RESULTS

(Dollars in millions)	Three months ended September 30,								Nine months ended September 30,
	2017			2016			% Change		2017			2016			% Change
Earned premiums	$	56		$	58		(3	)	$	173		$	175		(1	)
Fee revenues	1			2			(50	)	4			4			0
Total revenues	57			60			(5	)	177			179			(1	)
Contract holders' benefits incurred	59			63			(6	)	184			188			(2	)
Investment interest credited to contract holders'	(24		)	(23		)	(4	)	(70		)	(67		)	(4	)
Underwriting expenses incurred	26			24			8		63			62			2
Total benefits and expenses	61			64			(5	)	177			183			(3	)
Life insurance segment loss	$	(4	)	$	(4	)	0		$	—		$	(4	)	nm

Overview

Performance highlights for the life insurance segment include:

• Revenues – Revenues decreased for the nine months ended September 30, 2017, primarily due to lower earned premiums from universal life and other life insurance products, partially offset by higher earned premiums from term life insurance, our largest life insurance product line. The decline in universal life insurance premiums was attributable to the unlocking of actuarial assumptions that slowed amortization of unearned front-end loads.

Net in-force life insurance policy face amounts increased to $60.094 billion at September 30, 2017, from $56.808 billion at year-end 2016.

Fixed annuity deposits received for the three and nine months ended September 30, 2017, were $6 million and $23 million compared with $10 million and $36 million for same periods of 2016. Fixed annuity deposits have a minimal impact to earned premiums because deposits received are initially recorded as liabilities. Profit is earned over time by way of interest-rate spreads. We do not write variable or equity-indexed annuities.

Life Insurance Premiums

(Dollars in millions)	Three months ended September 30,						Nine months ended September 30,
	2017		2016		% Change		2017		2016		% Change
Term life insurance	$	39	$	37	5		$	118	$	112	5
Universal life insurance	7		13		(46	)	28		34		(18	)
Other life insurance, annuity and disability   income products	10		8		25		27		29		(7	)
Net earned premiums	$	56	$	58	(3	)	$	173	$	175	(1	)

• Profitability – Our life insurance segment typically reports a small profit or loss on a GAAP basis because profits from investment income spreads are included in our investment segment results. We include only investment income credited to contract holders (including interest assumed in life insurance policy reserve calculations) in our life insurance segment results. A loss of less than $1 million for our life insurance segment in the first nine months of 2017, compared with a loss of $4 million for the same period of 2016, was largely due to more favorable mortality results.

Life insurance segment benefits and expenses consist principally of contract holders’ (policyholders’) benefits incurred related to traditional life and interest-sensitive products and operating expenses incurred, net of deferred acquisition costs. Total benefits decreased in the first nine months of 2017. Life policy and investment contract reserves increased with continued growth in net in-force life insurance policy face amounts. Mortality results decreased from the same period of 2016 and were less than our 2017 projections.

Underwriting expenses for the first nine months of 2017 increased slightly compared with the same period a year ago. For the first nine months of 2017, unlocking of interest rate and other actuarial assumptions had an

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immaterial impact on the amount of expenses deferred to future periods. For the first nine months of 2016, unlocking decreased the amount of expenses deferred to future periods, increasing underwriting expenses.

We recognize that assets under management, capital appreciation and investment income are integral to evaluating the success of the life insurance segment because of the long duration of life products. On a basis that includes investment income and realized gains or losses from life-insurance-related invested assets, the life insurance company reported a net profit of $8 million and $33 million in the three and nine months ended September 30, 2017, compared with a net profit of $10 million and $32 million for the same periods of 2016. The life insurance company portfolio had net after-tax realized investment gains of less than $1 million and $2 million for the three and nine months ended September 30, 2017, compared with $2 million and $3 million of net after-tax realized investment gains for the three and nine months ended September 30, 2016.

INVESTMENTS RESULTS

Overview

The investments segment contributes investment income and realized gains and losses to results of operations. Investments traditionally are our primary source of pretax and after-tax profits.

Investment Income

Pretax investment income increased 3 percent for third-quarter 2017 and 2 percent for the nine months ended September 30, 2017, compared with the same periods of 2016. Interest income rose due to net purchases of fixed-maturity securities that offset the continuing effects of the low interest rate environment. Higher dividend income reflected rising dividend rates and net purchases of equity securities.

Investments Results

(Dollars in millions)	Three months ended September 30,								Nine months ended September 30,
	2017			2016			% Change		2017			2016			% Change
Total investment income, net of expenses	$	153		$	148		3		$	453		$	442		2
Investment interest credited to contract holders'	(24		)	(23		)	(4	)	(70		)	(67		)	(4	)
Realized investment gains, net	7			56			nm		156			161			(3	)
Investments profit, pretax	$	136		$	181		(25	)	$	539		$	536		1

We continue to position our portfolio considering both the challenges presented by the current low interest rate environment and the risks presented by potential future inflation. As bonds in our generally laddered portfolio mature or are called over the near term, we will be challenged to replace their current yield. The table below shows the average pretax yield-to-amortized cost associated with expected principal redemptions for our fixed-maturity portfolio. The expected principal redemptions are based on par amounts and include dated maturities, calls and prefunded municipal bonds that we expect will be called during each respective time period.

(Dollars in millions)	% Yield	Principal redemptions
At September 30, 2017
Fixed-maturity pretax yield profile:
Expected to mature during the remainder of 2017	5.30	$	125
Expected to mature during 2018	5.69	916
Expected to mature during 2019	6.15	734
Average yield and total expected redemptions from the remainder of 2017 through 2019	5.85	$	1,775

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The table below shows the average pretax yield-to-amortized cost for fixed-maturity securities acquired during the periods indicated. The average yield for total fixed-maturity securities acquired during the first nine months of 2017 was lower than the 4.54 percent average yield-to-amortized cost of the fixed-maturity securities portfolio at the end of 2016. Our fixed-maturity portfolio's average yield of 4.47 percent for the first nine months of 2017, from the investment income table below, was also lower than that yield for the year-end 2016 fixed-maturities portfolio.

	Three months ended September 30,				Nine months ended September 30,
	2017		2016		2017		2016
Average pretax yield-to-amortized cost on new   fixed-maturities:
Acquired taxable fixed-maturities	3.81	%	3.73	%	4.00	%	4.27	%
Acquired tax-exempt fixed-maturities	3.15		2.66		3.34		2.89
Average total fixed-maturities acquired	3.55		3.39		3.68		3.86

While our bond portfolio more than covers our insurance reserve liabilities, we believe our diversified common stock portfolio of mainly blue chip, dividend-paying companies represents one of our best investment opportunities for the long term. In our 2016 Annual Report on Form 10-K, Item 1, Investments Segment, Page 23, and Item 7, Investments Outlook, Page 86, we discussed our portfolio strategies. We discuss risks related to our investment income and our fixed-maturity and equity investment portfolios in this quarterly report Item 3, Quantitative and Qualitative Disclosures About Market Risk.

The table below provides details about investment income. Average yields in this table are based on the average invested asset and cash amounts indicated in the table, using fixed-maturity securities valued at amortized cost and all other securities at fair value.

(Dollars in millions)	Three months ended September 30,							Nine months ended September 30,
	2017			2016			% Change	2017			2016			% Change
Investment income:
Interest	$	112		$	111		1	$	334		$	330		1
Dividends	43			39			10	124			117			6
Other	1			1			0	3			2			50
Less investment expenses	3			3			0	8			7			14
Investment income, pretax	153			148			3	453			442			2
Less income taxes	35			35			0	106			105			1
Total investment income, after-tax	$	118		$	113		4	$	347		$	337		3
Investment returns:
Average invested assets plus cash and cash   equivalents	$	16,769		$	15,564			$	16,462		$	15,192
Average yield pretax	3.65		%	3.80		%		3.67		%	3.88		%
Average yield after-tax	2.81			2.90				2.81			2.96
Effective tax rate	23.4			23.9				23.5			23.8
Fixed-maturity returns:
Average amortized cost	$	10,121		$	9,588			$	9,967		$	9,491
Average yield pretax	4.43		%	4.63		%		4.47		%	4.64		%
Average yield after-tax	3.25			3.37				3.27			3.37
Effective tax rate	26.6			27.3				26.8			27.3

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Net Realized Gains and Losses

We reported net realized investment gains of $7 million and $156 million for the three and nine months ended September 30, 2017, compared with $56 million and $161 million of net realized investment gains for the same periods of 2016. The total net realized investment gains for the first nine months of 2017 included $143 million in net gains from sales of various common and preferred stock holdings, compared with $146 million for the same period of 2016.

Investment gains or losses are recognized upon the sales of investments or as otherwise required under GAAP. The timing of realized gains or losses from sales can have a material effect on results in any quarter. However, such gains or losses usually have little, if any, effect on total shareholders’ equity because most equity and fixed-maturity investments are carried at fair value, with the unrealized gain or loss included as a component of accumulated other comprehensive income (AOCI). Accounting requirements for other-than-temporary impairment (OTTI) charges for the fixed-maturity portfolio are disclosed in our 2016 Annual Report on Form 10-K, Item 8, Note 1, Summary of Significant Accounting Policies, Page 122.

Of the 3,484 securities in the portfolio, no securities were trading below 70 percent of amortized cost at September 30, 2017. Our asset impairment committee regularly monitors the portfolio, including a quarterly review of the entire portfolio for potential OTTI charges. We believe that if liquidity in the markets were to significantly deteriorate or economic conditions were to significantly weaken, we could experience declines in portfolio values and possibly additional OTTI charges.

The table below provides additional detail for OTTI charges:

(Dollars in millions)	Three months ended September 30,				Nine months ended September 30,
	2017		2016		2017		2016
Fixed maturities:
Utilities	$	—	$	—	$	—	$	2
Banking	—		—		6		—
Total fixed maturities	—		—		6		2
Common equities:
Energy	—		—		3		—
Total common equities	—		—		3		—
Total	$	—	$	—	$	9	$	2

OTHER

We report as Other the noninvestment operations of the parent company and a noninsurance subsidiary, CFC Investment Company. We also report as Other the underwriting results of Cincinnati Re, our reinsurance assumed operation, including earned premiums, loss and loss expenses and underwriting expenses.

Total revenues for the first nine months of 2017 for our Other operations increased, compared with the same period of 2016, primarily due to earned premiums from Cincinnati Re. Total expenses for Other also increased for the first nine months of 2017, primarily due to losses and loss expenses and underwriting expenses from Cincinnati Re.

Other loss in the table below represents losses before income taxes. The net result of Cincinnati Re for the first nine months of 2017 was an underwriting loss of approximately $23 million, largely due to an increase in losses from natural catastrophes. For both periods shown, Other loss resulted largely from underwriting results for Cincinnati Re and interest expense from debt of the parent company.

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(Dollars in millions)	Three months ended September 30,								Nine months ended September 30,
	2017			2016			% Change		2017			2016			% Change
Interest and fees on loans and leases	$	1		$	2		(50	)	$	3		$	4		(25	)
Earned premiums	32			13			146		80			33			142
Other revenues	1			—			nm		1			1			0
Total revenues	34			15			127		84			38			121
Interest expense	13			13			0		39			39			0
Loss and loss expenses	57			2			nm		78			16			388
Underwriting expenses	7			5			40		25			11			127
Operating expenses	3			3			0		11			10			10
Total expenses	80			23			248		153			76			101
Other loss	$	(46	)	$	(8	)	(475	)	$	(69	)	$	(38	)	(82	)

TAXES

We had $27 million and $130 million of income tax expense for the three and nine months ended September 30, 2017, compared with $73 million and $193 million for the same periods of 2016. The effective tax rates for the three and nine months ended September 30, 2017, were 20.9 percent and 24.4 percent compared with 28.9 percent and 28.2 percent for the same periods last year. The change in our effective tax rate was primarily due to changes in pretax income from underwriting results and realized investment gains and losses, with immaterial changes in the amount of permanent book-tax differences. For the three and nine months ended September 30, 2017, the change in our effective tax rate also reflected the adoption of ASU 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting.

Historically, we have pursued a strategy of investing some portion of cash flow in tax-advantaged fixed-maturity and equity securities to minimize our overall tax liability and maximize after-tax earnings. See Tax-Exempt Fixed Maturities in this quarterly report Item 3, Quantitative and Qualitative Disclosures About Market Risk for further discussion on municipal bond purchases in our fixed-maturity investment portfolio. For our property casualty insurance subsidiaries, approximately 85 percent of interest from tax-advantaged fixed-maturity investments and approximately 60 percent of dividends from qualified equities are exempt from federal tax after applying proration from the 1986 Tax Reform Act. Our noninsurance companies own an immaterial amount of tax-advantaged fixed-maturity investments. For our noninsurance companies, the dividend received deduction exempts 70 percent of dividends from qualified equities. Our life insurance company does not own tax-advantaged fixed-maturity investments or equities subject to the dividend received deduction. Details about our effective tax rate are in this quarterly report Item 1, Note 9 – Income Taxes.

LIQUIDITY AND CAPITAL RESOURCES

At September 30, 2017, shareholders’ equity was $7.523 billion, compared with $7.060 billion at December 31, 2016. Total debt was $804 million at September 30, 2017, down $3 million from December 31, 2016. At September 30, 2017, cash and cash equivalents totaled $674 million, compared with $777 million at December 31, 2016.

SOURCES OF LIQUIDITY

Subsidiary Dividends

Our lead insurance subsidiary declared dividends of $290 million to the parent company in the first nine months of 2017, compared with $300 million for the same period of 2016. For full-year 2016, subsidiary dividends declared totaled $475 million. State of Ohio regulatory requirements restrict the dividends our insurance subsidiary can pay. For full-year 2017, total dividends that our insurance subsidiary could pay to our parent company without regulatory approval are approximately $469 million.

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Investing Activities

Investment income is a source of liquidity for both the parent company and its insurance subsidiary. We continue to focus on portfolio strategies to balance near-term income generation and long-term book value growth.

Parent company obligations can be funded with income on investments held at the parent-company level or through sales of securities in that portfolio, although our investment philosophy seeks to compound cash flows over the long term. These sources of capital can help minimize subsidiary dividends to the parent company, protecting insurance subsidiary capital.

See our 2016 Annual Report on Form 10-K, Item 1, Investments Segment, Page 23, for a discussion of our historic investment strategy, portfolio allocation and quality.

Insurance Underwriting

Our property casualty and life insurance underwriting operations provide liquidity because we generally receive premiums before paying losses under the policies purchased with those premiums. After satisfying our cash requirements, we use excess cash flows for investment, increasing future investment income.

Historically, cash receipts from property casualty and life insurance premiums, along with investment income, have been more than sufficient to pay claims, operating expenses and dividends to the parent company.

The table below shows a summary of operating cash flow for property casualty insurance (direct method):

(Dollars in millions)	Three months ended September 30,								Nine months ended September 30,
	2017			2016			% Change		2017			2016			% Change
Premiums collected	$	1,217		$	1,185		3		$	3,723		$	3,534		5
Loss and loss expenses paid	(725		)	(662		)	(10	)	(2,114		)	(1,853		)	(14	)
Commissions and other underwriting expenses   paid	(333		)	(318		)	(5	)	(1,163		)	(1,081		)	(8	)
Cash flow from underwriting	159			205			(22	)	446			600			(26	)
Investment income received	108			105			3		310			303			2
Cash flow from operations	$	267		$	310		(14	)	$	756		$	903		(16	)

Collected premiums for property casualty insurance rose $189 million during the first nine months of 2017, compared with the same period in 2016. Loss and loss expenses paid increased $261 million, including a $103 million increase for catastrophe losses and loss expenses. Commissions and other underwriting expenses paid rose $82 million, primarily due to higher commissions paid to agencies, reflecting the increase in collected premiums.

We discuss our future obligations for claims payments and for underwriting expenses in our 2016 Annual Report on Form 10-K, Item 7, Contractual Obligations, Page 91, and Other Commitments also on Page 91.

Capital Resources

At September 30, 2017, our debt-to-total-capital ratio was 9.7 percent, with $787 million in long-term debt and $17 million in borrowing on our revolving short-term line of credit. That line of credit had a $20 million balance at December 31, 2016. At September 30, 2017, $208 million was available for future cash management needs. Based on our capital requirements at September 30, 2017, we do not anticipate a material increase in debt levels during the remainder of 2017. As a result, we expect changes in our debt-to-total-capital ratio to continue to be largely a function of the contribution of unrealized investment gains or losses to shareholders’ equity.

We provide details of our three, long-term notes in this quarterly report Item 1, Note 3 – Fair Value Measurements. None of the notes are encumbered by rating triggers.

Four independent ratings firms award insurer financial strength ratings to our property casualty insurance companies and three firms rate our life insurance company. Those firms made no changes to our parent company

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debt ratings during the first nine months of 2017. Our debt ratings are discussed in our 2016 Annual Report on Form 10-K, Item 7, Liquidity and Capital Resources, Other Sources of Liquidity, Page 89.

Off-Balance Sheet Arrangements

We do not use any special-purpose financing vehicles or have any undisclosed off-balance sheet arrangements (as that term is defined in applicable SEC rules) that are reasonably likely to have a current or future material effect on the company’s financial condition, results of operation, liquidity, capital expenditures or capital resources. Similarly, the company holds no fair-value contracts for which a lack of marketplace quotations would necessitate the use of fair-value techniques.

USES OF LIQUIDITY

Our parent company and insurance subsidiary have contractual obligations and other commitments. In addition, one of our primary uses of cash is to enhance shareholder return.

Contractual Obligations

In our 2016 Annual Report on Form 10-K, Item 7, Contractual Obligations, Page 91, we estimated our future contractual obligations as of December 31, 2016. There have been no material changes to our estimates of future contractual obligations since our 2016 Annual Report on Form 10-K.

Other Commitments

In addition to our contractual obligations, we have other property casualty operational commitments.

• Commissions – Commissions paid were $708 million in the first nine months of 2017. Commission payments generally track with written premiums, except for annual profit-sharing commissions typically paid during the first quarter of the year.

• Other underwriting expenses – Many of our underwriting expenses are not contractual obligations, but reflect the ongoing expenses of our business. Noncommission underwriting expenses paid were $455 million in the first nine months of 2017.

• Technology costs – In addition to contractual obligations for hardware and software, we anticipate capitalizing up to $7 million in spending for key technology initiatives in 2017. Capitalized development costs related to key technology initiatives were $6 million in the first nine months of 2017. These activities are conducted at our discretion, and we have no material contractual obligations for activities planned as part of these projects.

We contributed $5 million to our qualified pension plan during the first nine months of 2017.

Investing Activities

After fulfilling operating requirements, we invest cash flows from underwriting, investment and other corporate activities in fixed-maturity and equity securities on an ongoing basis to help achieve our portfolio objectives. We discuss our investment strategy and certain portfolio attributes in this quarterly report Item 3, Quantitative and Qualitative Disclosures About Market Risk.

Uses of Capital

Uses of cash to enhance shareholder return include dividends to shareholders. In January, May and August 2017, the board of directors declared regular quarterly cash dividends of 50 cents per share for an indicated annual rate of $2.00 per share. During the first nine months of 2017, we used $239 million to pay cash dividends to shareholders.

PROPERTY CASUALTY INSURANCE LOSS AND LOSS EXPENSE RESERVES

For the business lines in the commercial and personal lines insurance segments, and in total for the excess and surplus lines segment, the following table details gross reserves among case, IBNR (incurred but not reported) and loss expense reserves, net of salvage and subrogation reserves. Reserving practices are discussed in our 2016 Annual Report on Form 10-K, Item 7, Property Casualty Insurance Loss and Loss Expense Obligations and Reserves, Page 93.

Total gross reserves at September 30, 2017, increased $265 million compared with December 31, 2016. Case loss reserves for losses increased $139 million, IBNR loss reserves increased by $75 million and loss expense reserves

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increased by $51 million. Accounting for most of the total gross increase was the aggregate of our commercial casualty and commercial auto lines of business and our Cincinnati Re reinsurance assumed operation.

Property Casualty Gross Reserves

(Dollars in millions)	Loss reserves					Loss expense reserves		Total gross reserves
	Case reserves		IBNR reserves							Percent of total
At September 30, 2017
Commercial lines insurance:
Commercial casualty	$	956	$	586		$	588	$	2,130	40.3	%
Commercial property	270		10			61		341		6.4
Commercial auto	398		122			120		640		12.1
Workers' compensation	399		526			95		1,020		19.2
Other commercial	116		15			61		192		3.6
Subtotal	2,139		1,259			925		4,323		81.6
Personal lines insurance:
Personal auto	237		43			68		348		6.6
Homeowner	112		(4		)	31		139		2.6
Other personal	60		42			5		107		2.0
Subtotal	409		81			104		594		11.2
Excess and surplus lines	106		82			69		257		4.8
Cincinnati Re	16		108			2		126		2.4
Total	$	2,670	$	1,530		$	1,100	$	5,300	100.0	%
At December 31, 2016
Commercial lines insurance:
Commercial casualty	$	928	$	553		$	556	$	2,037	40.5	%
Commercial property	253		28			58		339		6.7
Commercial auto	374		86			103		563		11.2
Workers' compensation	382		553			95		1,030		20.4
Other commercial	116		19			75		210		4.2
Subtotal	2,053		1,239			887		4,179		83.0
Personal lines insurance:
Personal auto	228		24			66		318		6.3
Homeowner	102		22			29		153		3.0
Other personal	46		47			5		98		2.0
Subtotal	376		93			100		569		11.3
Excess and surplus lines	94		86			61		241		4.8
Cincinnati Re	8		37			1		46		0.9
Total	$	2,531	$	1,455		$	1,049	$	5,035	100.0	%

LIFE POLICY AND INVESTMENT CONTRACT RESERVES

Gross life policy and investment contract reserves were $2.716 billion at September 30, 2017, compared with $2.671 billion at year-end 2016, reflecting continued growth in life insurance policies in force. We discuss our life insurance reserving practices in our 2016 Annual Report on Form 10-K, Item 7, Life Insurance Policyholder Obligations and Reserves, Page 100.

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OTHER MATTERS

SIGNIFICANT ACCOUNTING POLICIES

Our significant accounting policies are discussed in our 2016 Annual Report on Form 10-K, Item 8, Note 1, Summary of Significant Accounting Policies, Page 122, and updated in this quarterly report Item 1, Note 1, Accounting Policies.

In conjunction with those discussions, in the Management’s Discussion and Analysis in the 2016 Annual Report on Form 10-K, management reviewed the estimates and assumptions used to develop reported amounts related to the most significant policies. Management discussed the development and selection of those accounting estimates with the audit committee of the board of directors.

Item 3.    Quantitative and Qualitative Disclosures About Market Risk

Our greatest exposure to market risk is through our investment portfolio. Market risk is the potential for a decrease in securities’ fair value resulting from broad yet uncontrollable forces such as: inflation, economic growth or recession, interest rates, world political conditions or other widespread unpredictable events. It is comprised of many individual risks that, when combined, create a macroeconomic impact.

Our view of potential risks and our sensitivity to such risks is discussed in our 2016 Annual Report on Form 10-K, Item 7A, Quantitative and Qualitative Disclosures About Market Risk, Page 107.

The fair value of our investment portfolio was $16.565 billion at September 30, 2017, up $1.146 billion from year-end 2016, including a $455 million increase in the fixed-maturity portfolio and a $691 million increase in the equity portfolio.

(Dollars in millions)	At September 30, 2017								At December 31, 2016
	Cost or amortized cost		Percent  of total		Fair value		Percent  of total		Cost or amortized cost		Percent  of total		Fair value		Percent  of total
Taxable fixed maturities	$	6,404	47.8	%	$	6,699	40.4	%	$	6,381	49.9	%	$	6,630	43.0	%
Tax-exempt fixed maturities	3,731		27.9		3,841		23.2		3,418		26.7		3,455		22.4
Common equity securities	3,084		23.0		5,808		35.1		2,812		22.0		5,123		33.2
Nonredeemable preferred   equity securities	180		1.3		217		1.3		183		1.4		211		1.4
Total	$	13,399	100.0	%	$	16,565	100.0	%	$	12,794	100.0	%	$	15,419	100.0	%

At September 30, 2017, our consolidated investment portfolio included $6 million of assets for which values are based on prices or valuation techniques that require significant management judgment (Level 3 assets). This represented less than 1 percent of investment portfolio assets measured at fair value. See Item 1, Note 3, Fair Value Measurements, for additional discussion of our valuation techniques. We have generally obtained and evaluated two nonbinding quotes from brokers; then, our investment professionals determined our best estimate of fair value. These investments include private placements, small issues and various thinly traded securities.

In addition to our investment portfolio, the total investments amount reported in our condensed consolidated balance sheets includes Other invested assets. Other invested assets included $31 million of life policy loans, $31 million of private equity investments and $37 million of real estate through direct property ownership and development projects in the United States at September 30, 2017.

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FIXED-MATURITY SECURITIES INVESTMENTS

By maintaining a well-diversified fixed-maturity portfolio, we attempt to reduce overall risk. We invest new money in the bond market on a regular basis, targeting what we believe to be optimal risk-adjusted, after-tax yields. Risk, in this context, includes interest rate, call, reinvestment rate, credit and liquidity risk. We do not make a concerted effort to alter duration on a portfolio basis in response to anticipated movements in interest rates. By regularly investing in the bond market, we build a broad, diversified portfolio that we believe mitigates the impact of adverse economic factors.

In the first nine months of 2017, the increase in fair value of our fixed-maturity portfolio was driven by the combination of net purchases of securities and an increase in net unrealized gains that primarily reflected a slight decrease in interest rates and a narrowing of corporate credit spreads. At September 30, 2017, our fixed-maturity portfolio with an average rating of A2/A was valued at 104.0 percent of its amortized cost, compared with 102.9 percent at December 31, 2016.

At September 30, 2017, our investment-grade and noninvestment-grade fixed-maturity securities represented 87.5 percent and 3.8 percent of the portfolio, respectively. The remaining 8.7 percent represented fixed-maturity securities that were not rated by Moody's or S&P Global Ratings.

Attributes of the fixed-maturity portfolio include:

	At September 30, 2017		At December 31, 2016
Weighted average yield-to-amortized cost	4.40	%	4.54	%
Weighted average maturity	7.5	yrs	7.1	yrs
Effective duration	5.2	yrs	5.0	yrs

We discuss maturities of our fixed-maturity portfolio in our 2016 Annual Report on Form 10-K, Item 8, Note 2, Investments, Page 129, and in this quarterly report Item 2, Investments Results.

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TAXABLE FIXED MATURITIES

Our taxable fixed-maturity portfolio, with a fair value of $6.699 billion at September 30, 2017, included:

(Dollars in millions)	At September 30, 2017		At December 31, 2016
Investment-grade corporate	$	5,379	$	5,336
Noninvestment-grade corporate	404		445
States, municipalities and political subdivisions	393		373
Commercial mortgage-backed	288		287
Government sponsored enterprises	204		164
United States government	16		10
Foreign government	10		10
Convertibles and bonds with warrants attached	5		5
Total	$	6,699	$	6,630

Our strategy is to buy, and typically hold, fixed-maturity investments to maturity, but we monitor credit profiles and fair value movements when determining holding periods for individual securities. With the exception of United States agency issues that include government-sponsored enterprises, no individual issuer’s securities accounted for more than 1.1 percent of the taxable fixed-maturity portfolio at September 30, 2017. Our investment-grade corporate bonds had an average rating of Baa2 by Moody’s or BBB+ by S&P Global Ratings and represented 80.3 percent of the taxable fixed-maturity portfolio’s fair value at September 30, 2017, compared with 80.5 percent at year-end 2016.

The heaviest concentration in our investment-grade corporate bond portfolio, based on fair value at

September 30, 2017, was the financial sector. It represented 45.2 percent of our investment-grade corporate bond portfolio, compared with 42.5 percent at year-end 2016. No other sector exceeded 10 percent of our investment-grade corporate bond portfolio.

Most of the $393 million of securities issued by states, municipalities and political subdivisions included in our taxable fixed-maturity portfolio at September 30, 2017, were Build America Bonds.

Our taxable fixed-maturity portfolio at September 30, 2017, included $288 million of commercial mortgage-backed securities with an average rating of Aa1/AA.

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TAX-EXEMPT FIXED MATURITIES

At September 30, 2017, we had $3.841 billion of tax-exempt fixed-maturity securities with an average rating of Aa2/AA by Moody’s and S&P Global Ratings. We traditionally have purchased municipal bonds focusing on general obligation and essential services issues, such as water, waste disposal or others. The portfolio is well diversified among approximately 1,400 municipal bond issuers. No single municipal issuer accounted for more than 0.6 percent of the tax-exempt fixed-maturity portfolio at September 30, 2017.

INTEREST RATE SENSITIVITY ANALYSIS

Because of our strong surplus, long-term investment horizon and ability to hold most fixed-maturity investments until maturity, we believe the company is adequately positioned if interest rates were to rise. Although the fair values of our existing holdings may suffer, a higher rate environment would provide the opportunity to invest cash flow in higher-yielding securities, while reducing the likelihood of untimely redemptions of currently callable securities. While higher interest rates would be expected to continue to increase the number of fixed-maturity holdings trading below 100 percent of amortized cost, we believe lower fixed-maturity security values due solely to interest rate changes would not signal a decline in credit quality. We continue to manage the portfolio with an eye toward both meeting current income needs and managing interest rate risk.

Our dynamic financial planning model uses analytical tools to assess market risks. As part of this model, the effective duration of the fixed-maturity portfolio is continually monitored by our investment department to evaluate the theoretical impact of interest rate movements.

The table below summarizes the effect of hypothetical changes in interest rates on the fair value of the fixed-maturity portfolio:

(Dollars in millions)	Effect from interest rate change in basis points
	-200		-100		-		100		200
At September 30, 2017	$	11,654	$	11,098	$	10,540	$	9,986	$	9,461
At December 31, 2016	$	11,131	$	10,603	$	10,085	$	9,577	$	9,094

The effective duration of the fixed-maturity portfolio as of September 30, 2017, was 5.2 years, up from 5.0 years at year-end 2016. The above table is a theoretical presentation showing that an instantaneous, parallel shift in the yield curve of 100 basis points could produce an approximately 5.3 percent change in the fair value of the fixed-maturity portfolio. Generally speaking, the higher a bond is rated, the more directly correlated movements in its fair value are to changes in the general level of interest rates, exclusive of call features. The fair values of average- to lower-rated corporate bonds are additionally influenced by the expansion or contraction of credit spreads.

In our dynamic financial planning model, the selected interest rate change of 100 to 200 basis points represents our view of a shift in rates that is quite possible over a one-year period. The rates modeled should not be considered a prediction of future events as interest rates may be much more volatile in the future. The analysis is not intended to provide a precise forecast of the effect of changes in rates on our results or financial condition, nor does it take into account any actions that we might take to reduce exposure to such risks.

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EQUITY INVESTMENTS

Our equity investments, with a fair value totaling $6.025 billion at September 30, 2017, included $5.808 billion of common stock securities of companies generally with strong indications of paying and growing their dividends. Other criteria we evaluate include increasing sales and earnings, proven management and a favorable outlook. We believe our equity investment style is an appropriate long-term strategy. While our long-term financial position would be affected by prolonged changes in the market valuation of our investments, we believe our strong surplus position and cash flow provide a cushion against short-term fluctuations in valuation. Continued payment of cash dividends by the issuers of our common equity holdings can provide a floor to their valuation.

The table below summarizes the effect of hypothetical changes in market prices on fair value of our equity portfolio.

(Dollars in millions)	Effect from market price change in percent
		-30%		-20%		-10%		—		10%		20%		30%
At September 30, 2017		$	4,218	$	4,820	$	5,423	$	6,025	$	6,628	$	7,230	$	7,833
At December 31, 2016		$	3,734	$	4,267	$	4,801	$	5,334	$	5,867	$	6,401	$	6,934

At September 30, 2017, Apple Inc. (Nasdaq:AAPL) was our largest single common stock holding with a fair value of $216 million, or 3.7 percent of our publicly traded common stock portfolio and 1.3 percent of the total investment portfolio. Twenty-nine holdings among eight different sectors each had a fair value greater than $100 million.

Common Stock Portfolio Industry Sector Distribution

	Percent of common stock portfolio
	At September 30, 2017				At December 31, 2016
	Cincinnati  Financial		S&P 500 Industry Weightings		Cincinnati Financial		S&P 500 Industry Weightings
Sector:
Information technology	16.7	%	23.2	%	17.6	%	20.8	%
Financial	15.5		14.6		15.6		14.8
Industrials	14.9		10.2		14.9		10.3
Healthcare	14.7		14.5		12.6		13.6
Consumer discretionary	13.2		11.9		10.4		12.0
Consumer staples	7.9		8.2		10.3		9.4
Energy	7.6		6.1		8.5		7.5
Materials	5.4		3.0		5.8		2.8
Utilities	2.1		3.1		2.2		3.2
Telecomm services	1.7		2.2		2.1		2.7
Real Estate	0.3		3.0		—		2.9
Total	100.0	%	100.0	%	100.0	%	100.0	%

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UNREALIZED INVESTMENT GAINS AND LOSSES

At September 30, 2017, unrealized investment gains before taxes for the consolidated investment portfolio totaled

$3.231 billion and unrealized investment losses amounted to $65 million.

The net unrealized investment gains at September 30, 2017, consisted of a pretax net gain position in our fixed-maturity portfolio of $405 million and a net gain position in our equity portfolio of $2.761 billion. The net gain position in our fixed-maturity portfolio increased in the first nine months of 2017 primarily due to slight declines in both interest rates and corporate credit spreads. The net gain position for our current fixed-maturity holdings will naturally decline over time as individual securities mature. In addition, changes in interest rates can cause rapid, significant changes in fair values of fixed-maturity securities and the net gain position, as discussed in Quantitative and Qualitative Disclosures About Market Risk. Events or factors such as economic growth or recession can also affect the fair value of our equity securities. The seven largest contributors to our common stock portfolio net gain position were Honeywell International Inc. (NYSE:HON), JP Morgan Chase & Co. (NYSE:JPM), Apple, Blackrock Inc. (NYSE:BLK), Microsoft Corporation (Nasdaq:MSFT), Johnson & Johnson (NYSE:JNJ) and 3M Company (NYSE:MMM) which had a combined gross unrealized gain position of $864 million.

Unrealized Investment Losses

We expect the number of securities trading below amortized cost to fluctuate as interest rates rise or fall and credit spreads expand or contract due to prevailing economic conditions. Further, amortized costs for some securities are revised through OTTI recognized in prior periods. At September 30, 2017, 492 of the 3,484 securities we owned had fair values below amortized cost, compared with 784 of the 3,315 securities we owned at year-end 2016. The 492 holdings with fair values below cost or amortized cost at September 30, 2017, represented 9.5 percent of the fair value of our investment portfolio and $65 million in unrealized losses.

• 485 of the 492 holdings had fair value between 90 percent and 100 percent of amortized cost at September 30, 2017. Ten of these 485 holdings are equity securities that may be subject to OTTI charges taken through earnings should they not recover by the recovery dates we determined. The fair value of these 10 equity securities was $102 million, and they accounted for $7 million in unrealized losses. The remaining 475 securities primarily consist of fixed-maturity securities whose current valuation is largely the result of interest rate factors. The fair value of these 475 securities was $1.295 billion, and they accounted for $26 million in unrealized losses.

• Seven of the 492 holdings had fair value between 70 percent and 90 percent of amortized cost at September 30, 2017. Four of these holdings were equity securities. The fair value of these four equity securities was $174 million, and they accounted for $31 million in unrealized losses. We believe the three fixed-maturity securities will continue to pay interest and ultimately pay principal upon maturity. The issuers of these three securities have strong cash flow to service their debt and meet their contractual obligation to make principal payments. The fair value of these securities was $7 million, and they accounted for $1 million in unrealized losses.

• No securities had fair value below 70 percent of amortized cost at September 30, 2017.

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The table below reviews fair values and unrealized losses by investment category and by the overall duration of the securities’ continuous unrealized loss position.

(Dollars in millions)	Less than 12 months				12 months or more				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
At September 30, 2017	value		losses		value		losses		value		losses
Fixed maturity securities:
Corporate	$	231	$	4	$	193	$	7	$	424	$	11
States, municipalities and political subdivisions	508		8		122		5		630		13
Commercial mortgage-backed securities	43		—		3		—		46		—
Government-sponsored enterprises	152		3		43		—		195		3
United States government	7		—		—		—		7		—
Subtotal	941		15		361		12		1,302		27
Equity securities:
Common equities	276		38		—		—		276		38
Subtotal	276		38		—		—		276		38
Total	$	1,217	$	53	$	361	$	12	$	1,578	$	65
At December 31, 2016
Fixed maturity securities:
Corporate	$	733	$	15	$	189	$	11	$	922	$	26
States, municipalities and political subdivisions	989		42		—		—		989		42
Commercial mortgage-backed	89		2		2		—		91		2
Government-sponsored enterprises	155		3		—		—		155		3
United States government	6		—		—		—		6		—
Subtotal	1,972		62		191		11		2,163		73
Equity securities:
Common equities	103		9		—		—		103		9
Nonredeemable preferred equities	4		—		—		—		4		—
Subtotal	107		9		—		—		107		9
Total	$	2,079	$	71	$	191	$	11	$	2,270	$	82

At September 30, 2017, 94 fixed-maturity securities with a total unrealized loss of $12 million had been in an unrealized loss position for 12 months or more. Of that total, no fixed-maturity security had a fair value below 70 percent of amortized cost; two fixed-maturity securities with a fair value of $6 million had a fair value from 70 percent to less than 90 percent of amortized cost and accounted for $1 million in unrealized losses; and 92 fixed-maturity securities with a fair value of $355 million had fair values from 90 percent to less than 100 percent of amortized cost and accounted for $11 million in unrealized losses.

At September 30, 2017, no equity securities had been in an unrealized loss position for 12 months or more.

At September 30, 2017, applying our invested asset impairment policy, we determined that the total of $12 million, for securities in an unrealized loss position for 12 months or more in the table above, was not other-than-temporarily impaired.

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During the third quarter of 2017, no securities were written down through an impairment charge, keeping the total at six during the first nine months of 2017. OTTI resulted in pretax, noncash charges of $9 million for the nine months ended September 30, 2017. During the first nine months of 2016, four securities were written down resulting in $2 million in OTTI charges.

During full-year 2016, we wrote down four securities and recorded $2 million in OTTI charges. At December 31, 2016, 32 fixed-maturity investments with a total unrealized loss of $11 million had been in an unrealized loss position for 12 months or more. Of that total, no fixed-maturity investments had fair values below 70 percent of amortized cost. There were no equity security investments in an unrealized loss position for 12 months or more as of December 31, 2016.

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The following table summarizes the investment portfolio by severity of decline:

(Dollars in millions)	Number of issues	Cost or  amortized cost		Fair value		Gross  unrealized  gain (loss)			Gross investment income
At September 30, 2017
Taxable fixed maturities:
Fair valued below 70% of amortized cost	—	$	—	$	—	$	—		$	—
Fair valued at 70% to less than 100% of amortized cost	213	759		743		(16		)	15
Fair valued at 100% and above of amortized cost	1,275	5,645		5,956		311			216
Investment income on securities sold in current year	—	—		—		—			12
Total	1,488	6,404		6,699		295			243
Tax-exempt fixed maturities:
Fair valued below 70% of amortized cost	—	—		—		—			—
Fair valued at 70% to less than 100% of amortized cost	265	570		559		(11		)	11
Fair valued at 100% and above of amortized cost	1,630	3,161		3,282		121			77
Investment income on securities sold in current year	—	—		—		—			3
Total	1,895	3,731		3,841		110			91
Common equities:
Fair valued below 70% of cost	—	—		—		—			—
Fair valued at 70% to less than 100% of cost	14	314		276		(38		)	8
Fair valued at 100% and above of cost	57	2,770		5,532		2,762			104
Investment income on securities sold in current year	—	—		—		—			2
Total	71	3,084		5,808		2,724			114
Nonredeemable preferred equities:
Fair valued below 70% of cost	—	—		—		—			—
Fair valued at 70% to less than 100% of cost	—	—		—		—			—
Fair valued at 100% and above of cost	30	180		217		37			9
Investment income on securities sold in current year	—	—		—		—			—
Total	30	180		217		37			9
Portfolio summary:
Fair valued below 70% of cost or amortized cost	—	—		—		—			—
Fair valued at 70% to less than 100% of cost or amortized cost	492	1,643		1,578		(65		)	34
Fair valued at 100% and above of cost or amortized cost	2,992	11,756		14,987		3,231			406
Investment income on securities sold in current year	—	—		—		—			17
Total	3,484	$	13,399	$	16,565	$	3,166		$	457
At December 31, 2016
Portfolio summary:
Fair valued below 70% of cost or amortized cost	—	$	—	$	—	$	—		$	—
Fair valued at 70% to less than 100% of cost or amortized cost	784	2,352		2,270		(82		)	62
Fair valued at 100% and above of cost or amortized cost	2,531	10,442		13,149		2,707			501
Investment income on securities sold in current year	—	—		—		—			38
Total	3,315	$	12,794	$	15,419	$	2,625		$	601

See our 2016 Annual Report on Form 10-K, Item 7, Critical Accounting Estimates, Asset Impairment, Page 53.

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Item 4.        Controls and Procedures

Evaluation of Disclosure Controls and Procedures – The company maintains disclosure controls and procedures (as that term is defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (Exchange Act)).

Any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives. The company’s management, with the participation of the company’s chief executive officer and chief financial officer, has evaluated the effectiveness of the design and operation of the company’s disclosure controls and procedures as of September 30, 2017. Based upon that evaluation, the company’s chief executive officer and chief financial officer concluded that the design and operation of the company’s disclosure controls and procedures provided reasonable assurance that the disclosure controls and procedures are effective to ensure:

• that information required to be disclosed in the company’s reports under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission’s rules and forms, and

• that such information is accumulated and communicated to the company’s management, including its chief executive officer and chief financial officer, as appropriate, to allow timely decisions regarding required disclosures.

Changes in Internal Control over Financial Reporting – During the three months ended September 30, 2017, there were no changes in our internal controls over financial reporting that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Part II – Other Information

Item 1.    Legal Proceedings

Neither the company nor any of our subsidiaries are involved in any litigation believed to be material other than ordinary, routine litigation incidental to the nature of our business.

Item 1A.    Risk Factors

Our risk factors have not changed materially since they were described in our 2016 Annual Report on Form 10-K filed February 24, 2017.

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

We did not sell any of our shares that were not registered under the Securities Act during the first nine months of 2017. Our repurchase program was expanded on October 22, 2007, to increase our repurchase authorization to approximately 13 million shares. Our repurchase program does not have an expiration date. We have 2,542,065 shares available for purchase under our programs at September 30, 2017.

Period	Total number  of shares  purchased	Average  price paid  per share		Total number of shares  purchased as part of publicly announced plans or programs	Maximum number of shares that may yet be purchased under the plans or programs
July 1-31, 2017	—	$	—	—	2,542,065
August 1-31, 2017	—	—		—	2,542,065
September 1-30, 2017	—	—		—	2,542,065
Totals	—	—		—

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Item 6.    Exhibits

Exhibit No.	Exhibit Description
3.1	Amended and Restated Articles of Incorporation of Cincinnati Financial Corporation (as of September 13, 2017)
3.2	Regulations of Cincinnati Financial Corporation, as amended through May 1, 2010 (incorporated by reference to the company’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2010, Exhibit 3.2)
31A	Certification pursuant to Section 302 of the Sarbanes Oxley Act of 2002 – Chief Executive Officer
31B	Certification pursuant to Section 302 of the Sarbanes Oxley Act of 2002 – Chief Financial Officer
32	Certification pursuant to Section 906 of the Sarbanes Oxley Act of 2002
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document

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SIGNATURE

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

CINCINNATI FINANCIAL CORPORATION

Date: October 26, 2017

/S/ Michael J. Sewell

Michael J. Sewell, CPA

Chief Financial Officer, Senior Vice President and Treasurer

(Principal Accounting Officer)

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EX-3.1

1

CINCINNATI FINANCIAL CORPORATION BOARD OF DIRECTORS

AUGUST 18, 2017

RESOLUTION TO APPROVE AMENDED AND RESTATED ARTICLES OF INCORPORATION

WHEREAS, the company's current Articles of Incorporation consist of the Amended Articles of Incorporation of Cincinnati Financial Corporation , adopted by resolution of the Board of Directors on November 19, 2010 , along with an Amendment to the Amended Articles of Incorporation of Cincinnati Financial Corporation , adopted at an annual meeting of shareholders held on April 30,

2016.

WHEREAS , the Amended Articles of Incorporation of Cincinnati Financial Corporation and the Amendment to the Amended Articles of Incorporation of Cincinnati Financial Corporation have been previously filed with the Secretary of State of the State of Ohio;

WHEREAS , it is advantageous to consolidate the documents which jointly constitute the current Articles of Incorporation applicable to the corporation in a single document; and

WHEREAS, the document entitled Amended and Restated Articles of Incorporation of Cincinnati Financial Corporation attached hereto as Exhibit A accurately consolidates the Amended Articles of Incorporation and the Amendment thereto;

RESOLVED, the board of directors approves the Amended and Restated Articles of Incorporation of Cincinnati Financial Corporation (as of August 18, 2017), as set forth in Exhibit A, and instructs the Secretary to file a copy of the Amended and Restated Articles of Incorporation (as of August 18, 2017) with the Secretary of State of the State of Ohio.

2

AMENDED AND RESTATED ARTICLES OF INCORPORATION OF

CINCINNATI FINANCIAL CORPORATION

(as of August 18, 2017)

FIRST: The name of the corporation is CINCINNATI FINANCIAL CORPORATION (the "Corporation").

SECOND: The principal office of the Corporation in the State of Ohio shall be located in the City of Fairfield, County of Butler.

THIRD: The purpose for which the Corporation is formed is to engage in any lawful act or activity for which corporations may be organized under the Ohio General Corporation Law specifically including acting as a control entity in an insurance holding company system under Chapter 3901 of the Ohio Revised Code. The Corporation is hereby expressly authorized to repurchase and to redeem its outstanding securities to the maximum extent now or hereafter permitted by applicable law.

FOURTH: The total number of shares of stock which the Corporation shall have authority to issue is Five Hundred Million (500,000,000) and the par value of each share shall be Two ($2.00) Dollars.

FIFTH:No holder of shares of any class of the Corporation shall have any preemptive right to acquire shares of the Corporation and the preemptive rights described in Ohio Revised Code §1701.15 are hereby specifically denied to the holders of shares of any class of the Corporation.

SIXTH: (a) Subject to the provisions of part (c) of this Article SIXTH, the Board of Directors shall be divided into three (3) classes, each class consisting of one-third (as nearly as possible but in no event may any one class have greater than one more director than any other class) of the total number of directors. At each annual meeting of the shareholders, the successors to the class of directors whose term shall then expire shall be elected to hold office for a term expiring at the third succeeding annual meeting. Subject to the right of the shareholders to fix the number of directors at a meeting called for the purpose of electing directors, the Board of Directors may change the number of directors constituting the Board of Directors by resolution.

(b)Directors of the Corporation shall only be removed by the shareholders for cause. "Cause" for the removal of a director shall exist only upon the occurrence of one

(1)of the following events: (1) the conviction of a director of a felony; or (2) a finding by a court of law that the director has been or is guilty of negligence or misconduct in the performance of his duties as a director of the Corporation. Vacancies in the Board of Directors, whether arising through death, resignation or removal of a director, or newly created directorships resulting from any increase in the authorized number of directors, shall be filled by a majority of the directors then in office, or by a sole remaining director,

3

and the directors so chosen shall hold office until the next annual meeting of shareholders and until his or her successor has been duly elected and qualified. No decrease in the number of authorized directors shall shorten the term of any incumbent director .

(c) Notwithstanding anything contained in part (a) of this Article SIXTH to the contrary, beginning at the 2011 annual meeting of shareholders , directors shall be elected annually for terms of one year, except that any director whose term expires at the 2012 annual meeting of shareholders or the 2013 annual meeting of shareholders shall continue to hold office until the end of the term for which such director was elected or appointed and until such director's successor shall have been elected and qualified , subject, however, to prior death, resignation, retirement, disqualification or removal from office. Accordingly , (i) at the 2010 annual meeting of shareholders, the directors whose terms expire at that meeting shall be elected to hold office for a three-year term expiring at the 2013 annual meeting of shareholders ; (ii) at that 2011 annual meeting of shareholders , the directors whose terms expire at that meeting shall be elected to hold office for a one­ year term expiring at the 2012 annual meeting of shareholders ; and (iii) at the 2012 annual meeting of shareholde rs, the directors whose terms expire at that meeting shall be elected to hold office for a one-year term expiring at the 2013 annual meeting of shareholders .

SEVENTH: In furtherance and not in limitation of the powers conferred by statute, the Board of Directors is expressly authorized:

To authorize and cause to be executed mortgages and liens upon the real and personal property of the corporation ;

To set apart out of any of the funds of the Corporation available for dividends a reserve or reserves for any proper purpose and to abolish any such reserve in the manner in which it was created;

By a majority of the whole board, to designate one or more committees, each committee to consist of at least three of the directors of the corporation. The board may designate one or more directors as alternate members of any committee, who may replace any absent or disqualified member at any meeting of the committee. Any such committee, to the extent provided in the resolution or in the regulations of the corporation , shall have and may exercise the powers of the Board of Directors in the management of the business and affairs of the corporation, and may authorize the seal of the corporation to be affixed to all papers which may require it.

EIGHTH: (a) Unless the conditions set forth in this Article are satisfied, the affirmative vote of the holders of seventy-five (75) percent of all shares of the corporation entitled to vote in elections of Directors, shall be required for the adoption or authorization of a business combination (as hereinafter defined) with any other entity (as hereinafter defined) if, as of the record date for the determination of shareholders entitled to notice thereof and to vote thereon, the other entity is the beneficial owner, directly or indirectly, of more than ten (10) percent of the outstanding shares of the Corporation entitled to vote in elections of Directors. The seventy-five (75) percent voting requirement set forth in the foregoing sentence shall not be applicable if:

4

The cash, or fair market value of other consideration, to be received per share by holders of common shares of the Corporation in the business combination is not less than the greater of: (A) the highest per-share price (including brokerage commissions , soliciting dealers' fees, dealer-management compensation, and other expenses, including, but not limited to, costs of newspaper advertisements, printing expenses, and attorney fees) paid by the other entity in acquiring any of its holdings of the common shares of the Corporation or, (B) an amount which bears the same or a greater percentage relationship to the market value price of the Corporation's common stock immediately prior to the announcement of such business combination as the highest per-share price determined in

(A)above bears to the market price of the Corporation's common stock immediately prior to the commencement of acquisition of the Corporation's common stock by the other entity but in no event in excess of two times the highest per-share price determined in (A) above;

The provisions of this Article shall also apply to a business combination with any other entity that at any time has been the beneficial owner, directly or indirectly, of more than ten (10) percent of the outstanding shares of the Corporation entitled to vote in elections of Directors, notwithstanding the fact that the other entity has reduced its shareholdings below ten (10) percent if, as of the record date for the determination of shareholders entitled to notice of and to vote on the business combination, the other entity is an "affiliate" of the Corporation (as hereinafter defined) .

(a)As used in this Article, (1) the term "other entity" shall include any corporation, person, or other entity and any other entity with which it or its "affiliate" or "associate" (as defined below) has any agreement , arrangement, or understanding, directly or indirectly , for the purpose of acquiring, holding, voting or disposing of shares of the Corporation, or that is its "affiliate" or "associate" as those terms are defined in Rule 12b-2 of the general rules and regulations under the Securities Exchange Act of 1934, together with the successors and assigns of those persons in any transaction or series of transactions not involving a public offering of the Corporation's shares within the meaning of the Securities Act of 1933; (2) an other entity shall be deemed to be the beneficial owner of any shares of the Corporation that the other entity has the right to acquire pursuant to any agreement or upon exercise of conversion rights, warrants , or options or otherwise ; (3) the outstanding shares of any class of the Corporation shall include shares deemed owned through application of clause (2) above but shall not include any other shares that may be issuable pursuant to any agreement or upon exercise of conversion rights, warrants , or options or otherwise; (4) the term "business combination" shall include (A) the sale, exchange , lease, transfer or other disposition by the Corporation of all, or substantially all, of its assets or business to any other entity, (B) the consolidation of the Corporation with or its merger into any other entity, (C) the merger into the Corporation of any other entity, or

(D) a "combination " or "majority share acquisition" in which the Corporation isthe "acquiring corporation" (as those terms are defined in Section 1701.01 of the Ohio Revised Code or any similar provision hereafter enacted) and its voting shares are issued or transferred to any other entity or to the shareholders of any other entity, and the term "business combination " shall also include any agreement , contract, or other arrangement with another entity providing for any of the transactions described in (A) through (D) of this clause (4); and (5) for the purposes of clause (a)(1) of this Article, the term "other consideration to be received" shall mean common shares of the Corporation retained by its existing public

5

shareholders in the event of a business combination with the other entity in which the Corporation is the surviving corporation.

(a)Nothing contained in this Article shall be construed to relieve any other entity from any fiduciary obligation imposed by law.

NINTH: Meetings of stockholders may be held within or without the State of Ohio. The books of the Corporation may be kept (subject to any provision contained in the statutes) outside the State of Ohio at such place or places as may be designated from time to time by the Board of Directors or in the Regulations of the Corporation. Elections of directors need not be by written ballot unless the Regulations of the Corporation shall so provide.

TENTH: The Corporation reserves the right to amend, alter, change or repeal any provision contained in these Articles of Incorporation, in the manner now or hereafter prescribed by statute, and all rights conferred upon shareholders herein are granted subject to this reservation. Notwithstanding the foregoing, this Article and Articles SIXTH and EIGHTH of the Corporation' s Articles of Incorporation may be altered, amended or repealed only if seventy-five (75) percent of the outstanding stock of each class entitled to vote thereon as a class have been voted in favor of such action.

ELEVENTH: Each person who is or was a director or officer of the Corporation shall be indemnified by the Corporation to the full extent permitted by the General Corporation Law of the State of Ohio against any liability, cost or expense incurred by him in his capacity as a director or officer or arising out of his status as a director or officer. The Corporation may, but shall not be obligated to, maintain insurance, at its expense, to protect itself and any such person against any such liability, cost or expense. The indemnification authorized by this Article ELEVENTH shall not be exclusive of, and shall be in addition to, any other rights granted to a person seeking indemnification or advancement of expenses under any statute, the Regulations or any agreement, vote of shareholders or disinterested directors or otherwise, both as to action in his official capacity and as to action in another capacity while holding such office.

TWELFTH: No action required to be taken or which may be taken at any annual or special meeting of shareholders of the Corporation may be taken without a meeting, and the power of shareholders to consent in writing, without a meeting, to the taking of any action, including (without limitation) the power of shareholders to adopt or amend the Regulations by written consent, is hereby specifically denied.

Special meetings of the shareholders of the Corporation may be called only by the Board of Directors or the Chief Executive Officer of the Corporation or by persons who hold fifty (50) percent of all shares of the Corporation outstanding and entitled to vote at such special meeting.

No holder of shares of any class of the Corporation shall have the right to cumulate his voting power in the election of the Board of Directors and the right to cumulative voting

6

described in Ohio Revised Code §1701.55 is hereby specifically denied to the holders of shares of any class of the Corporation.

THIRTEENTH: At each meeting of shareholders at which directors are to be elected, a candidate for director shall be elected only if the votes "for" the candidate exceed the votes "against" the candidate. Abstentions and broker nonvotes shall not be counted as votes "for" or "against" a candidate. Notwithstanding the foregoing, if the Board of Directors determines that the number of candidates exceeds the number of Directors to be elected, then in that election the candidates receiving the greatest number of votes shall be elected.

7

EX-31.A

EXHIBIT 31A

CERTIFICATION PURSUANT TO SECTION 302 OF

THE SARBANES OXLEY ACT OF 2002

I, Steven J. Johnston, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Cincinnati Financial Corporation;

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

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

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

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

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

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

d. disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

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

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

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

Date: October 26, 2017

/S/ Steven J. Johnston

Steven J. Johnston, FCAS, MAAA, CFA, CERA

President and Chief Executive Officer

EX-31.B

EXHIBIT 31B

CERTIFICATION PURSUANT TO SECTION 302 OF

THE SARBANES OXLEY ACT OF 2002

I, Michael J. Sewell, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Cincinnati Financial Corporation;

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

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

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

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

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

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

d. disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

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

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

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

Date: October 26, 2017

/S/ Michael J. Sewell

Michael J. Sewell, CPA

Chief Financial Officer, Senior Vice President and Treasurer

(Principal Accounting Officer)

EX-32

EXHIBIT 32

CERTIFICATION PURSUANT TO SECTION 302 OF

THE SARBANES OXLEY ACT OF 2002

The certification set forth below is being submitted in connection with this report on Form 10-Q for the purpose of complying with Rule 13a-14(b) or Rule 15d-14(b) of the Exchange Act and Section 1350 of Chapter 63 of Title 18 of the United States Code.

Steven J. Johnston, the chief executive officer, and Michael J. Sewell, the chief financial officer, of Cincinnati Financial Corporation each certifies that, to the best of his knowledge:

1. the report fully complies with the requirements of Section 13(a) or 15(d) of the Exchange Act; and

2. the information contained in the report fairly presents, in all material respects, the financial condition and results of operations of Cincinnati Financial Corporation.

Date: October 26, 2017

/S/ Steven J. Johnston

Steven J. Johnston, FCAS, MAAA, CFA, CERA

President and Chief Executive Officer

/S/ Michael J. Sewell

Michael J. Sewell, CPA

Chief Financial Officer, Senior Vice President and Treasurer

(Principal Accounting Officer)

XML

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Oct. 20, 2017
Document Documentand Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q3
Trading Symbol	CINF
Entity Registrant Name	CINCINNATI FINANCIAL CORP
Entity Central Index Key	0000020286
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		164,071,775

XML

Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Investments
Fixed maturities, at fair value (amortized cost: 2017—$10,135; 2016—$9,799)	$ 10,540	$ 10,085
Equity securities, at fair value (cost: 2017—$3,264; 2016—$2,995)	6,025	5,334
Other invested assets	99	81
Total investments	16,664	15,500
Cash and cash equivalents	674	777
Investment income receivable	128	134
Finance receivable	56	51
Premiums receivable	1,640	1,533
Reinsurance recoverable	522	545
Prepaid reinsurance premiums	44	62
Deferred policy acquisition costs	676	637
Land, building and equipment, net, for company use (accumulated depreciation: 2017—$251; 2016—$237)	186	183
Other assets	204	198
Separate accounts	798	766
Total assets	21,592	20,386
Insurance reserves
Loss and loss expense reserves	5,350	5,085
Life policy and investment contract reserves	2,716	2,671
Unearned premiums	2,475	2,307
Other liabilities	800	786
Deferred income tax	1,087	865
Note payable	17	20
Long-term debt and capital lease obligations	826	826
Separate accounts	798	766
Total liabilities	14,069	13,326
Commitments and contingent liabilities (Note 12)
Shareholders' Equity
Common stock, par value—$2 per share; (authorized: 2017 and 2016—198.3 million shares; issued: 2017 and 2016—198.3 million shares)	397	397
Paid-in capital	1,256	1,252
Retained earnings	5,193	5,037
Accumulated other comprehensive income	2,047	1,693
Treasury stock at cost (2017—34.3 million shares and 2016—33.9 million shares)	(1,370)	(1,319)
Total shareholders' equity	7,523	7,060
Total liabilities and shareholders' equity	$ 21,592	$ 20,386

XML

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Millions, $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Fixed maturities, amortized cost	$ 10,135	$ 9,799
Available-for-sale Equity Securities, Amortized Cost Basis	3,264	2,995
Land, building and equipment, accumulated depreciation	$ 251	$ 237
Common stock, par value	$ 2	$ 2
Common stock, authorized	500.0	500.0
Common stock, issued	198.3	198.3
Common stock, outstanding	198.3	198.3
Treasury stock, shares	34.3	33.9

XML

Condensed Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenues [Abstract]
Earned premiums	$ 1,247	$ 1,191	$ 3,696	$ 3,518
Investment income, net of expenses	153	148	453	442
Realized investment gains and losses, net	7	56	156	161
Fee revenues	3	5	12	11
Other revenues	2	2	4	5
Total revenues	1,412	1,402	4,321	4,137
Benefits and Expenses
Insurance losses and contract holders' benefits	874	753	2,581	2,298
Underwriting, acquisition and insurance expenses	393	380	1,157	1,106
Interest expense	13	13	39	39
Other operating expenses	3	3	11	10
Total benefits and expenses	1,283	1,149	3,788	3,453
Income Before Income Taxes	129	253	533	684
Provision for Income Taxes
Current	27	60	98	173
Deferred	0	13	32	20
Total provision for income taxes	27	73	130	193
Net Income	$ 102	$ 180	$ 403	$ 491
Per Common Share
Net income-basic (in USD per share)	$ 0.62	$ 1.09	$ 2.45	$ 2.98
Net income-diluted (in USD per share)	$ 0.61	$ 1.08	$ 2.42	$ 2.95

XML

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net Income	$ 102	$ 180	$ 403	$ 491
Change in unrealized gains on investments, net of tax of $66, $21, $189 and $224, respectively	123	41	352	417
Amortization of pension actuarial loss and prior service cost, net of tax of $1, $0, $1 and $1, respectively	0	0	1	1
Change in life deferred acquisition costs, life policy reserves and other, net of tax (benefit) of $(1), $0, $0 and $(4), respectively	(1)	(3)	1	(10)
Other comprehensive income	122	38	354	408
Comprehensive Income	$ 224	$ 218	$ 757	$ 899

XML

Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	$ 66	$ 21	$ 189	$ 224
Other Comprehensive Income Loss, Pension And Other Postretirement Benefit Plans, Net Actuarial Loss And Prior Service Cost Arising During Period, Tax	1	0	1	1
Other Comprehensive Income, Change in Life Deferred Acquisition Costs, Life Policy Reserves and Other, Tax	$ (1)	$ 0	$ 0	$ (4)

XML

Condensed Consolidated Statements of Shareholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Common equities	Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income	Treasury Stock
Beginning Balance at Dec. 31, 2015		$ 397	$ 1,232	$ 4,762	$ 1,344	$ (1,308)
Share-based awards		0	(9)			29
Share-based compensation			18
Other			3			3
Net Income	$ 491			491
Dividends declared				(237)
Other comprehensive income	408				408
Shares acquired - share repurchase authorization						(2)
Shares acquired - share-based compensation plans						(10)
Ending Balance at Sep. 30, 2016	7,121	$ 397	1,244	5,016	1,752	(1,288)
Beginning Balance (in shares) at Dec. 31, 2015		163.9
Share-based awards (in shares)		0.8
Shares acquired - share repurchase authorization (in shares)		0.0
Shares acquired - share-based compensation plans (in shares)		(0.1)
Stock Issued During Period, Shares, Other		0.1
Ending Balance (in shares) at Sep. 30, 2016		164.7
Beginning Balance at Dec. 31, 2016	7,060	$ 397	1,252	5,037	1,693	(1,319)
Share-based awards		0	(18)			22
Share-based compensation			19
Other			3			3
Net Income	403			403
Dividends declared				(247)
Other comprehensive income	354				354
Shares acquired - share repurchase authorization						(70)
Shares acquired - share-based compensation plans						(6)
Ending Balance at Sep. 30, 2017	$ 7,523	$ 397	$ 1,256	$ 5,193	$ 2,047	$ (1,370)
Beginning Balance (in shares) at Dec. 31, 2016	198.3	164.4
Share-based awards (in shares)		0.7
Shares acquired - share repurchase authorization (in shares)		(1.0)
Shares acquired - share-based compensation plans (in shares)		(0.1)
Stock Issued During Period, Shares, Other		0.0
Ending Balance (in shares) at Sep. 30, 2017	198.3	164.0

XML

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash Flows From Operating Activities
Net Income	$ 403	$ 491
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	40	34
Realized investment gains, net	(156)	(161)
Share-based compensation	19	18
Interest credited to contract holders'	36	36
Deferred income tax expense	32	20
Changes in:
Investment income receivable	6	8
Premiums and reinsurance receivable	(66)	(111)
Deferred policy acquisition costs	(44)	(31)
Other assets	(34)	(32)
Loss and loss expense reserves	265	273
Life policy reserves	71	75
Unearned premiums	168	187
Other liabilities	(46)	11
Current income tax receivable/payable	52	17
Net cash provided by operating activities	746	835
Cash Flows From Investing Activities
Sale of fixed maturities	20	15
Call or maturity of fixed maturities	815	1,160
Sale of equity securities	290	311
Purchase of fixed maturities	(1,155)	(1,465)
Purchase of equity securities	(399)	(396)
Investment in finance receivables	(21)	(13)
Collection of finance receivables	17	24
Investment in buildings and equipment, net	(14)	(9)
Change in other invested assets, net	(12)	(13)
Net cash used in investing activities	(459)	(386)
Cash Flows From Financing Activities
Payment of cash dividends to shareholders	(239)	(229)
Shares acquired - share repurchase authorization	(70)	(2)
Payments of note payable	(3)	(15)
Proceeds from stock options exercised	10	17
Contract holders' funds deposited	60	71
Contract holders' funds withdrawn	(119)	(118)
Excess tax benefits on stock-based compensation	0	4
Other	(29)	(21)
Net cash used in financing activities	(390)	(293)
Net change in cash and cash equivalents	(103)	156
Cash and cash equivalents at beginning of year	777	544
Cash and cash equivalents at end of period	674	700
Supplemental Disclosures of Cash Flow Information:
Interest paid	26	26
Income taxes paid	44	152
Noncash Activities
Conversion of securities	5	4
Equipment acquired under capital lease obligations	10	18
Cashless exercise of stock options	6	10
Other assets and other liabilities	$ 74	$ 29

XML

Accounting Policies

9 Months Ended

Sep. 30, 2017

Accounting Policies [Abstract]

Accounting Policies

NOTE 1 — Accounting Policies

The condensed consolidated financial statements include the accounts of Cincinnati Financial Corporation and its consolidated subsidiaries, each of which is wholly owned. These statements are presented in conformity with accounting principles generally accepted in the United States of America (GAAP). All intercompany balances and transactions have been eliminated in consolidation.

The preparation of financial statements in conformity with GAAP requires us to make estimates and assumptions that affect amounts reported in the financial statements and accompanying notes. Our actual results could differ from those estimates. Certain financial information that is normally included in annual financial statements prepared in accordance with GAAP, but that is not required for interim reporting purposes, has been condensed or omitted.

Our September 30, 2017, condensed consolidated financial statements are unaudited. We believe that we have made all adjustments, consisting only of normal recurring accruals, that are necessary for fair presentation. These condensed consolidated financial statements should be read in conjunction with our consolidated financial statements included in our 2016 Annual Report on Form 10-K. The results of operations for interim periods do not necessarily indicate results to be expected for the full year.

Adopted Accounting Updates

ASU 2016-07, Investments - Equity Method and Joint Ventures (Topic 323): Simplifying the Transition to the Equity Method of Accounting

In March 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2016-07, Equity Method and Joint Ventures (Topic 323): Simplifying the Transition to the Equity Method of Accounting. ASU 2016-07 eliminates the requirement to retroactively adjust an investment, results of operations, and retained earnings once an investment qualifies for use of the equity method. It requires the equity method investor to add the cost of acquiring the additional interest in the investee to the current basis of the investor's previously held interest and adopt the equity method of accounting as of the date the investment becomes qualified for equity method accounting without retroactive adjustment. The effective date of ASU 2016-07 was for interim and annual reporting periods beginning after December 15, 2016, and was applied prospectively. The company adopted this ASU effective January 1, 2017, and it did not have a material impact on our company's consolidated financial position, cash flows or results of operations.

ASU 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting

In March 2016, the FASB issued ASU 2016-09, Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. ASU 2016-09 simplifies several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. The effective date of ASU 2016-09 was for interim and annual reporting periods beginning after December 15, 2016. The recognition and classification of the excess tax benefit provisions were applied prospectively in the results of operations and statement of cash flows. This adoption resulted in excess tax benefits of an immaterial amount for the three months ended September 30, 2017, and

$7 million for the nine months ended September 30, 2017, which reduced our current provision for income taxes in our results of operations. The statutory tax withholding classification, which are cash payments made to taxing authorities for shares withheld, were applied retrospectively and reclassified the statutory tax withholding requirements in the statement of cash flows from Other liabilities in operating activities to Other in financing activities. This statutory tax withholding reclassification resulted in $13 million and $11 million being included in financing activities for the nine months ended September 30, 2017 and 2016, respectively. There were no cumulative effect adjustments upon adoption of this ASU.

Pending Accounting Updates

ASU 2014-09 Revenue from Contracts with Customers

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers. ASU 2014-09 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 and services. Insurance contracts do not fall within the scope of this ASU. The effective date of ASU 2014-09 is for interim and annual reporting periods beginning after December 15, 2017. The ASU has not yet been adopted and will not have a material impact on our company’s financial position, cash flows or results of operations.

ASU 2016-01, Financial Instruments - Overall (Subtopic 825-10) - Recognition and Measurement of Financial Assets and Financial Liabilities

In January 2016, the FASB issued ASU 2016-01, Financial Instruments - Overall (Subtopic 825-10) - Recognition and Measurement of Financial Assets and Financial Liabilities. ASU 2016-01 revises the accounting related to the classification and measurement of investments in equity securities and the presentation of certain fair value changes for financial liabilities measured at fair value. Our results of operations will be impacted as changes in fair value of equity securities will be reported in net income instead of reported in other comprehensive income. The effective date of ASU 2016-01 is for interim and annual reporting periods beginning after December 15, 2017, and will be applied prospectively. The ASU has not yet been adopted. Had we adopted this ASU on September 30, 2017, $1.795 billion of after-tax unrealized gains on equity securities would have been reclassified from accumulated other comprehensive income to retained earnings. The actual amount reclassified upon adoption will vary depending on the future changes in fair value of our equity portfolio.

ASU 2016-02, Leases (Topic 842)

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). The main provision of ASU 2016-02 requires the recognition of lease assets and lease liabilities by lessees for those leases classified as operating leases under previous GAAP. The effective date of ASU 2016-02 is for interim and annual reporting periods beginning after December 15, 2018. The ASU has not yet been adopted. Management is currently evaluating the impact on our company’s consolidated financial position, cash flows and results of operations.

ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments

In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. ASU 2016-13 amends previous guidance on the impairment of financial instruments by adding an impairment model that allows an entity to recognize expected credit losses as an allowance rather than impairing as they are incurred. The new guidance is intended to reduce complexity of credit impairment models and result in a more timely recognition of expected credit losses. The effective date of ASU 2016-13 is for interim and annual reporting periods beginning after December 15, 2019. The ASU has not yet been adopted. Management is currently evaluating the impact on our company's consolidated financial position, cash flows or results of operations.

ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments

In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. ASU 2016-15 addresses eight specific cash flow issues with the objective of reducing the existing diversity in practice. The effective date of ASU 2016-15 is for interim and annual reporting periods beginning after December 15, 2017. The ASU has not yet been adopted; however, it will not have a material impact on our company's consolidated financial position, cash flows or results of operations.

ASU 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost

In March 2017, the FASB issued ASU 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Postretirement Benefit Costs. ASU 2017-07 provides guidance on how to present the components of net periodic benefit costs in the income statement for pension plans and other post-retirement benefit plans. The effective date of ASU 2017-07 is for interim and annual reporting periods beginning after December 15, 2017. The ASU has not yet been adopted; however, it will not have a material impact on our company's consolidated financial position, cash flows or results of operations.

ASU 2017-08, Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities

In March 2017, the FASB issued ASU 2017-08, Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities. ASU 2017-08 amends guidance on the amortization period of premiums on certain purchased callable debt securities. The amendments shorten the amortization period of premiums on certain purchased callable debt securities to the earliest call date. The amendments should be applied on a modified retrospective basis through a cumulative-effect adjustment to beginning retained earnings. The effective date of ASU 2017-08 is for interim and annual reporting periods beginning after December 15, 2018. The ASU has not yet been adopted; however, it is not expected to have a material impact on our company's consolidated financial position, cash flows or results of operations.

ASU 2017-09, Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting

In May 2017, the FASB issued ASU 2017-09, Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting. ASU 2017-09 clarifies when to account for a change to the terms or conditions of a share-based payment award as a modification. Under the new guidance, modification accounting is required only if the fair value, the vesting conditions, or the classification of the award (as equity or liability) changes as a result of the change in terms or conditions. The amendment should be applied on a prospective basis. The effective date of ASU 2017-09 is for interim and annual reporting periods, beginning after December 15, 2017. The ASU has not yet been adopted; however, it will not have a material impact on our company's consolidated financial position, cash flows or results of operations upon adoption.

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Investments

9 Months Ended

Sep. 30, 2017

Investments [Abstract]

Investments

Investments

The following table provides cost or amortized cost, gross unrealized gains, gross unrealized losses and fair value for our fixed-maturity and equity securities:

(Dollars in millions)	Cost or amortized cost
			Gross unrealized				Fair value
At September 30, 2017			gains		losses
Fixed maturity securities:
Corporate	$	5,514	$	280	$	11	$	5,783
States, municipalities and political subdivisions	4,103		144		13		4,234
Commercial mortgage-backed	280		8		—		288
Government-sponsored enterprises	207		—		3		204
United States government	16		—		—		16
Foreign government	10		—		—		10
Convertibles and bonds with warrants attached	5		—		—		5
Subtotal	10,135		432		27		10,540
Equity securities:
Common equities	3,084		2,762		38		5,808
Nonredeemable preferred equities	180		37		—		217
Subtotal	3,264		2,799		38		6,025
Total	$	13,399	$	3,231	$	65	$	16,565
At December 31, 2016
Fixed maturity securities:
Corporate	$	5,555	$	252	$	26	$	5,781
States, municipalities and political subdivisions	3,770		100		42		3,828
Commercial mortgage-backed	282		7		2		287
Government-sponsored enterprises	167		—		3		164
United States government	10		—		—		10
Foreign government	10		—		—		10
Convertibles and bonds with warrants attached	5		—		—		5
Subtotal	9,799		359		73		10,085
Equity securities:
Common equities	2,812		2,320		9		5,123
Nonredeemable preferred equities	183		28		—		211
Subtotal	2,995		2,348		9		5,334
Total	$	12,794	$	2,707	$	82	$	15,419

The net unrealized investment gains in our fixed-maturity portfolio at September 30, 2017, are primarily the result of the continued low interest rate environment that increased the fair value of our fixed-maturity portfolio. Our commercial mortgage-backed securities had an average rating of Aa1/AA at September 30, 2017, and December 31, 2016. At September 30, 2017, the seven largest unrealized investment gains in our common stock portfolio are from Honeywell International Incorporated (NYSE:HON), JP Morgan Chase & Co. (NYSE:JPM), Apple Inc. (Nasdaq:AAPL), Blackrock Inc. (Nasdaq:BLK), Microsoft Corporation (Nasdaq:MSFT), Johnson & Johnson (NYSE:JNJ) and 3M Company (NYSE:MMM), which had a combined gross unrealized gain of $864 million. At September 30, 2017, Apple Inc. was our largest single equity holding with a fair value of $216 million, which was 3.7 percent of our publicly traded common equities portfolio and 1.3 percent of the total investment portfolio.

The table below provides fair values and gross unrealized losses by investment category and by the duration of the securities’ continuous unrealized loss positions:

(Dollars in millions)	Less than 12 months				12 months or more				Total
	Fair value		Unrealized losses		Fair value		Unrealized losses		Fair value		Unrealized losses
At September 30, 2017
Fixed maturity securities:
Corporate	$	231	$	4	$	193	$	7	$	424	$	11
States, municipalities and political subdivisions	508		8		122		5		630		13
Commercial mortgage-backed securities	43		—		3		—		46		—
Government-sponsored enterprises	152		3		43		—		195		3
United States government	7		—		—		—		7		—
Subtotal	941		15		361		12		1,302		27
Equity securities:
Common equities	276		38		—		—		276		38
Subtotal	276		38		—		—		276		38
Total	$	1,217	$	53	$	361	$	12	$	1,578	$	65
At December 31, 2016
Fixed maturity securities:
Corporate	$	733	$	15	$	189	$	11	$	922	$	26
States, municipalities and political subdivisions	989		42		—		—		989		42
Commercial mortgage-backed	89		2		2		—		91		2
Government-sponsored enterprises	155		3		—		—		155		3
United States government	6		—		—		—		6		—
Subtotal	1,972		62		191		11		2,163		73
Equity securities:
Common equities	103		9		—		—		103		9
Nonredeemable preferred equities	4		—		—		—		4		—
Subtotal	107		9		—		—		107		9
Total	$	2,079	$	71	$	191	$	11	$	2,270	$	82

Contractual maturity dates for fixed-maturity investments were:

(Dollars in millions)	Amortized cost		Fair value		% of fair value
At September 30, 2017
Maturity dates:
Due in one year or less	$	674	$	686	6.5	%
Due after one year through five years	2,668		2,803		26.6
Due after five years through ten years	3,853		4,009		38.0
Due after ten years	2,940		3,042		28.9
Total	$	10,135	$	10,540	100.0	%

Actual maturities may differ from contractual maturities when there is a right to call or prepay obligations with or without call or prepayment penalties.

The following table provides investment income, realized investment gains and losses, the change in unrealized investment gains and losses:

(Dollars in millions)	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Investment income:
Interest	$	112		$	111		$	334		$	330
Dividends	43			39			124			117
Other	1			1			3			2
Total	156			151			461			449
Less investment expenses	3			3			8			7
Total	$	153		$	148		$	453		$	442
Realized investment gains and losses:
Fixed maturities:
Gross realized gains	$	3		$	10		$	16		$	17
Gross realized losses	—			—			—			(1		)
Other-than-temporary impairments	—			—			(6		)	(2		)
Equity securities:
Gross realized gains	1			47			160			147
Gross realized losses	—			—			(14		)	(1		)
Other-than-temporary impairments	—			—			(3		)	—
Other	3			(1		)	3			1
Total	$	7		$	56		$	156		$	161
Change in unrealized investment gains and losses:
Fixed maturities	$	9		$	(20	)	$	119		$	274
Equity securities	180			82			422			367
Income tax provision	(66		)	(21		)	(189		)	(224		)
Total	$	123		$	41		$	352		$	417

During the three months ended September 30, 2017, there were no equity securities and no fixed-maturity securities other-than-temporarily impaired. During the nine months ended September 30, 2017, there were five equity securities and one fixed-maturity security other-than-temporarily impaired. There were no credit losses on fixed-maturity securities for which a portion of other-than-temporary impairment (OTTI) has been recognized in other comprehensive income for the three and nine months ended September 30, 2017 and 2016.

At September 30, 2017, 94 fixed-maturity investments with a total unrealized loss of $12 million had been in an unrealized loss position for 12 months or more. Of that total, no fixed-maturity investment had a fair value below 70 percent of amortized cost. At September 30, 2017, no equity investment had been in an unrealized loss position for 12 months or more. There were no equity investments with a fair value below 70 percent of amortized cost. At December 31, 2016, 32 fixed-maturity investments with a total unrealized loss of $11 million had been in an unrealized loss position for 12 months or more. Of that total, no fixed-maturity investments had fair values below 70 percent of amortized cost. There were no equity security investments in an unrealized loss position for 12 months or more as of December 31, 2016. There were no equity investments with a fair value below 70 percent of amortized cost at December 31, 2016.

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Fair Value Measurements

9 Months Ended

Sep. 30, 2017

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

In accordance with accounting guidance for fair value measurements and disclosures, we categorized our financial instruments, based on the priority of the observable and market-based data for the valuation technique used, into a three-level fair value hierarchy. The fair value hierarchy gives the highest priority to quoted prices with readily available independent data in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable market inputs (Level 3). When various inputs for measurement fall within different levels of the fair value hierarchy, the lowest observable input that has a significant impact on fair value measurement is used. Our valuation techniques have not changed from those used at December 31, 2016, and ultimately management determines fair value. See our 2016 Annual Report on Form 10-K, Item 8, Note 3, Fair Value Measurements, Page 132, for information on characteristics and valuation techniques used in determining fair value.

Fair Value Disclosures for Assets

The following tables illustrate the fair value hierarchy for those assets measured at fair value on a recurring basis at September 30, 2017, and December 31, 2016. We do not have any material liabilities carried at fair value. There were no transfers between Level 1 and Level 2.

(Dollars in millions)	Quoted prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)		Total
At September 30, 2017
Fixed maturities, available for sale:
Corporate	$	—	$	5,782	$	1	$	5,783
States, municipalities and political subdivisions	—		4,229		5		4,234
Commercial mortgage-backed	—		288		—		288
Government-sponsored enterprises	—		204		—		204
United States government	16		—		—		16
Foreign government	—		10		—		10
Convertibles and bonds with warrants attached	—		5		—		5
Subtotal	16		10,518		6		10,540
Common equities, available for sale	5,808		—		—		5,808
Nonredeemable preferred equities, available for sale	—		217		—		217
Separate accounts taxable fixed maturities	—		783		—		783
Top Hat savings plan mutual funds and common equity (included in Other assets)	30		—		—		30
Total	$	5,854	$	11,518	$	6	$	17,378
At December 31, 2016
Fixed maturities, available for sale:
Corporate	$	—	$	5,703	$	78	$	5,781
States, municipalities and political subdivisions	—		3,828		—		3,828
Commercial mortgage-backed	—		287		—		287
Government-sponsored enterprises	—		164		—		164
United States government	10		—		—		10
Foreign government	—		10		—		10
Convertibles and bonds with warrants attached	—		5		—		5
Subtotal	10		9,997		78		10,085
Common equities, available for sale	5,123		—		—		5,123
Nonredeemable preferred equities, available for sale	—		211		—		211
Separate accounts taxable fixed maturities	—		750		—		750
Top Hat savings plan mutual funds and common   equity (included in Other assets)	24		—		—		24
Total	$	5,157	$	10,958	$	78	$	16,193

Each financial instrument that was deemed to have significant unobservable inputs when determining valuation is identified in the following tables by security type with a summary of changes in fair value as of September 30, 2017. Total Level 3 assets continue to be less than 1 percent of financial assets measured at fair value in the condensed consolidated balance sheets. Assets presented in the table below were valued based primarily on broker/dealer quotes for which there is a lack of transparency as to inputs used to develop the valuations. Transfers out of Level 3 included situations where a broker quote was used without observable inputs or data that could be corroborated by our pricing vendors in the prior period and significant other observable inputs were identified in the current period. The quantitative detail of these unobservable inputs is neither provided nor reasonably available to us.

The following table provides the change in Level 3 assets for the three months ended September 30:

(Dollars in millions)	Asset fair value measurements using significant unobservable inputs (Level 3)
	Corporate fixed maturities			Taxable fixed maturities - separate accounts			States, municipalities and political subdivisions fixed maturities		Nonredeemable preferred equities		Total
Beginning balance, July 1, 2017	$	1		$	—		$	5	$	—	$	6
Total gains or losses (realized/unrealized):
Included in net income	—			—			—		—		—
Included in other comprehensive income	—			—			—		—		—
Purchases	—			—			—		—		—
Sales	—			—			—		—		—
Transfers into Level 3	—			—			—		—		—
Transfers out of Level 3	—			—			—		—		—
Ending balance, September 30, 2017	$	1		$	—		$	5	$	—	$	6
Beginning balance, July 1, 2016	$	52		$	1		$	—	$	—	$	53
Total gains or losses (realized/unrealized):
Included in net income	—			—			—		—		—
Included in other comprehensive income	1			—			—		—		1
Purchases	—			—			—		—		—
Sales	(1		)	—			—		—		(1		)
Transfers into Level 3	—			—			—		—		—
Transfers out of Level 3	(10		)	(1		)	—		—		(11		)
Ending balance, September 30, 2016	$	42		$	—		$	—	$	—	$	42

The following table provides the change in Level 3 assets for the nine months ended September 30:

(Dollars in millions)	Asset fair value measurements using significant unobservable inputs
		Corporate fixed maturities			Taxable fixed maturities - separate accounts			States, municipalities and political subdivisions fixed maturities		Nonredeemable preferred equities			Total
Beginning balance, January 1, 2017		$	78		$	—		$	—	$	—		$	78
Total gains or losses (realized/unrealized):
Included in net income		—			—			—		—			—
Included in other comprehensive income		—			—			—		—			—
Purchases		—			—			5		—			5
Sales		—			—			—		—			—
Transfers into Level 3		—			—			—		—			—
Transfers out of Level 3		(77		)	—			—		—			(77		)
Ending balance, September 30, 2017		$	1		$	—		$	5	$	—		$	6
Beginning balance, January 1, 2016		$	51		$	1		$	—	$	3		$	55
Total gains or losses (realized/unrealized):
Included in net income		—			—			—		—			—
Included in other comprehensive income		1			—			—		(1		)	—
Purchases		22			—			—		—			22
Sales		(1		)	—			—		(2		)	(3		)
Transfers into Level 3		—			—			—		—			—
Transfers out of Level 3		(31		)	(1		)	—		—			(32		)
Ending balance, September 30, 2016		$	42		$	—		$	—	$	—		$	42

Additional disclosures for the Level 3 category are not material.

Fair Value Disclosures for Assets and Liabilities Not Carried at Fair Value

The disclosures below are presented to provide information about the effects of current market conditions on financial instruments that are not reported at fair value in our condensed consolidated financial statements.

This table summarizes the book value and principal amounts of our long-term debt:

(Dollars in millions)				Book value				Principal amount
Interest rate		Year of  issue		September 30,		December 31,		September 30,		December 31,
				2017		2016		2017		2016
6.900	%	1998	Senior debentures, due 2028	$	26	$	26	$	28	$	28
6.920	%	2005	Senior debentures, due 2028	391		391		391		391
6.125	%	2004	Senior notes, due 2034	370		370		374		374
			Total	$	787	$	787	$	793	$	793

The following table shows fair values of our note payable and long-term debt:

(Dollars in millions)	Quoted prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)		Total
At September 30, 2017
Note payable	$	—	$	17	$	—	$	17
6.900% senior debentures, due 2028	—		34		—		34
6.920% senior debentures, due 2028	—		503		—		503
6.125% senior notes, due 2034	—		459		—		459
Total	$	—	$	1,013	$	—	$	1,013
At December 31, 2016
Note payable	$	—	$	20	$	—	$	20
6.900% senior debentures, due 2028	—		33		—		33
6.920% senior debentures, due 2028	—		488		—		488
6.125% senior notes, due 2034	—		435		—		435
Total	$	—	$	976	$	—	$	976

The following table shows the fair value of our life policy loans included in other invested assets:

(Dollars in millions)	Quoted prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)		Total
At September 30, 2017
Life policy loans	$	—	$	—	$	41	$	41
At December 31, 2016
Life policy loans	$	—	$	—	$	40	$	40

Outstanding principal and interest for these life policy loans totaled $31 million at September 30, 2017, and December 31, 2016.

The following table shows fair values of our deferred annuities and structured settlements included in life policy and investment contract reserves:

(Dollars in millions)	Quoted prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)		Total
At September 30, 2017
Deferred annuities	$	—	$	—	$	846	$	846
Structured settlements	—		209		—		209
Total	$	—	$	209	$	846	$	1,055
At December 31, 2016
Deferred annuities	$	—	$	—	$	839	$	839
Structured settlements	—		206		—		206
Total	$	—	$	206	$	839	$	1,045

Recorded reserves for the deferred annuities were $844 million and $861 million at September 30, 2017, and December 31, 2016, respectively. Recorded reserves for the structured settlements were $163 million and $170 million at September 30, 2017, and December 31, 2016, respectively.

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Property Casualty Loss and Loss Expenses

9 Months Ended

Sep. 30, 2017

Premiums Written, Net [Abstract]

Property Casualty Loss And Loss Expenses

Property Casualty Loss and Loss Expenses

This table summarizes activity for our consolidated property casualty loss and loss expense reserves:

(Dollars in millions)	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Gross loss and loss expense reserves, beginning   of period	$	5,213		$	4,918		$	5,035		$	4,660
Less reinsurance recoverable	283			310			298			281
Net loss and loss expense reserves, beginning of   period	4,930			4,608			4,737			4,379
Net incurred loss and loss expenses related to:
Current accident year	835			730			2,493			2,261
Prior accident years	(20		)	(40		)	(96		)	(151		)
Total incurred	815			690			2,397			2,110
Net paid loss and loss expenses related to:
Current accident year	411			374			969			848
Prior accident years	314			288			1,145			1,005
Total paid	725			662			2,114			1,853
Net loss and loss expense reserves, end of period	5,020			4,636			5,020			4,636
Plus reinsurance recoverable	280			301			280			301
Gross loss and loss expense reserves, end of   period	$	5,300		$	4,937		$	5,300		$	4,937

We use actuarial methods, models and judgment to estimate, as of a financial statement date, the property casualty loss and loss expense reserves required to pay for and settle all outstanding insured claims, including incurred but not reported (IBNR) claims, as of that date. The actuarial estimate is subject to review and adjustment by an inter-departmental committee that includes actuarial, claims, underwriting, loss prevention and accounting management. This committee is familiar with relevant company and industry business, claims and underwriting trends, as well as general economic and legal trends that could affect future loss and loss expense payments. The amount we will actually have to pay for claims can be highly uncertain. This uncertainty, together with the size of our reserves, makes the loss and loss expense reserves our most significant estimate. The reserve for loss and loss expenses in the condensed consolidated balance sheets also included $50 million at September 30, 2017, and

$54 million at September 30, 2016, for certain life and health loss and loss expense reserves.

For the three months ended September 30, 2017, we experienced $20 million of favorable development on prior accident years, including $18 million of favorable development in commercial lines, $3 million of favorable development in excess and surplus lines and $1 million of adverse development in our reinsurance assumed operations. This included $6 million from favorable development of catastrophe losses for the three months ended September 30, 2017. For the three months ended September 30, 2017, we recognized favorable reserve development of $14 million for the workers' compensation line, $7 million for the commercial property line and $5 million for the other commercial lines due to reduced uncertainty of prior accident year loss and loss adjustment expense for these lines. For the three months ended September 30, 2017, we recognized unfavorable reserve development of $8 million for the commercial auto line.

For the nine months endedSeptember 30, 2017, we experienced $96 million of favorable development on prior accident years, including $55 million of favorable development in commercial lines, $13 million of favorable development in personal lines, $25 million of favorable development in excess and surplus lines and $3 million of favorable development in our reinsurance assumed operations. This included $20 million from favorable development of catastrophe losses for the nine months endedSeptember 30, 2017. For the nine months endedSeptember 30, 2017, we recognized favorable reserve development of $44 million for the workers' compensation line, $21 million for the commercial property line and $25 million for the other commercial lines due to reduced uncertainty of prior accident year loss and loss adjustment expense for these lines. For the nine months endedSeptember 30, 2017, we recognized unfavorable reserve development of $27 million for the commercial auto line and $8 million for the commercial casualty line. The unfavorable reserve development for commercial casualty reflected higher large loss activity than prior year.

For the three months ended September 30, 2016, we experienced $40 million of favorable development on prior accident years, including $31 million of favorable development in commercial lines, $4 million of adverse development in personal lines, $12 million of favorable development in excess and surplus lines and $1 million of favorable development in our reinsurance assumed operations. We recognized favorable reserve development during the three months ended September 30, 2016, of $16 million for the workers' compensation line, $7 million for commercial casualty line and $11 million for the other commercial lines due to reduced uncertainty of prior accident year loss and loss adjustment expenses for these lines. We recognized unfavorable reserve development during the three months ended September 30, 2016, of $9 million for the personal auto line and $4 million for the commercial auto line. Both lines developed unfavorably due to higher loss cost effects in recent accident years, resulting in an increase of our reserve estimate for claims that have not yet been settled.

For the nine months endedSeptember 30, 2016, we experienced $151 million of favorable development on prior accident years, including $118 million of favorable development in commercial lines, $4 million of favorable development in personal lines, $27 million of favorable development in excess and surplus lines and $2 million of favorable development in our reinsurance assumed operations. This included $5 million from favorable development of catastrophe losses for the nine months endedSeptember 30, 2016. We recognized favorable reserve development during the nine months endedSeptember 30, 2016, of $52 million for the workers' compensation line, $30 million for the commercial casualty line, $25 million for the commercial property line and $37 million for the other commercial lines due to reduced uncertainty of prior accident year loss and loss adjustment expenses for these lines. We recognized unfavorable reserve development during the nine months ended September 30, 2016, of $26 million for the commercial auto line and $15 million for the personal auto line. Both lines developed unfavorably due to higher loss cost effects in recent accident years, resulting in an increase of our reserve estimate for claims that have not yet settled.

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Life Policy and Investment Contract Reserves

9 Months Ended

Sep. 30, 2017

Liability for Future Policy Benefits [Abstract]

Life Policy And Investment Contract Reserves

Life Policy and Investment Contract Reserves

We establish the reserves for traditional life insurance policies based on expected expenses, mortality, morbidity, withdrawal rates, timing of claim presentation and investment yields, including a provision for uncertainty. Once these assumptions are established, they generally are maintained throughout the lives of the contracts. We use both our own experience and industry experience, adjusted for historical trends, in arriving at our assumptions for expected mortality, morbidity and withdrawal rates as well as for expected expenses. We base our assumptions for expected investment income on our own experience adjusted for current economic conditions.

We establish reserves for the company’s deferred annuity, universal life and structured settlement policies equal to the cumulative account balances, which include premium deposits plus credited interest less charges and withdrawals. Some of our universal life policies contain no-lapse guarantee provisions. For these policies, we establish a reserve in addition to the account balance, based on expected no-lapse guarantee benefits and expected policy assessments.

This table summarizes our life policy and investment contract reserves:

(Dollars in millions)	September 30, 2017		December 31, 2016
Life policy reserves:
Ordinary/traditional life	$	1,063	$	1,011
Other	46		45
Subtotal	1,109		1,056
Investment contract reserves:
Deferred annuities	844		861
Universal life	594		578
Structured settlements	163		170
Other	6		6
Subtotal	1,607		1,615
Total life policy and investment contract reserves	$	2,716	$	2,671

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Deferred Acquisition Costs

9 Months Ended

Sep. 30, 2017

Deferred Costs [Abstract]

Deferred Acquisition Costs

Deferred Policy Acquisition Costs

Expenses directly related to successfully acquired insurance policies – primarily commissions, premium taxes and underwriting costs – are deferred and amortized over the terms of the policies. We update our acquisition cost assumptions periodically to reflect actual experience, and we evaluate the costs for recoverability. The table below shows the deferred policy acquisition costs and asset reconciliation.

(Dollars in millions)	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Property casualty:
Deferred policy acquisition costs asset, beginning of period	$	448		$	412		$	408		$	388
Capitalized deferred policy acquisition costs	223			216			686			644
Amortized deferred policy acquisition costs	(220		)	(207		)	(643		)	(611		)
Deferred policy acquisition costs asset, end of period	$	451		$	421		$	451		$	421
Life:
Deferred policy acquisition costs asset, beginning of period	$	230		$	212		$	229		$	228
Capitalized deferred policy acquisition costs	13			11			38			35
Amortized deferred policy acquisition costs	(17		)	(15		)	(37		)	(37		)
Amortized shadow deferred policy acquisition costs	(1		)	(2		)	(5		)	(20		)
Deferred policy acquisition costs asset, end of period	$	225		$	206		$	225		$	206
Consolidated:
Deferred policy acquisition costs asset, beginning of period	$	678		$	624		$	637		$	616
Capitalized deferred policy acquisition costs	236			227			724			679
Amortized deferred policy acquisition costs	(237		)	(222		)	(680		)	(648		)
Amortized shadow deferred policy acquisition costs	(1		)	(2		)	(5		)	(20		)
Deferred policy acquisition costs asset, end of period	$	676		$	627		$	676		$	627

No premium deficiencies were recorded in the condensed consolidated statements of income, as the sum of the anticipated loss and loss expenses, policyholder dividends and unamortized deferred acquisition expenses did not exceed the related unearned premiums and anticipated investment income.

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Accumulated Other Comprehensive Income

9 Months Ended

Sep. 30, 2017

Accumulated Other Comprehensive Income [Abstract]

Comprehensive Income (Loss) Note

Accumulated Other Comprehensive Income

Accumulated other comprehensive income (AOCI) includes changes in unrealized gains and losses on investments, changes in pension obligations and changes in life deferred acquisition costs, life policy reserves and other as follows:

(Dollars in millions)	Three months ended September 30,
	2017									2016
	Before tax			Income tax			Net			Before tax			Income tax			Net
Investments:
AOCI, beginning of period	$	2,977		$	1,031		$	1,946		$	2,673		$	925		$	1,748
OCI before realized gains recognized in net income	193			67			126			119			41			78
Realized gains recognized in net income	(4		)	(1		)	(3		)	(57		)	(20		)	(37		)
OCI	189			66			123			62			21			41
AOCI, end of period	$	3,166		$	1,097		$	2,069		$	2,735		$	946		$	1,789
Pension obligations:
AOCI, beginning of period	$	(25	)	$	(8	)	$	(17	)	$	(40	)	$	(13	)	$	(27	)
OCI excluding amortization recognized in net income	—			—			—			—			—			—
Amortization recognized in net income	1			1			—			—			—			—
OCI	1			1			—			—			—			—
AOCI, end of period	$	(24	)	$	(7	)	$	(17	)	$	(40	)	$	(13	)	$	(27	)
Life deferred acquisition costs, life policy reserves and other:
AOCI, beginning of period	$	(6	)	$	(2	)	$	(4	)	$	(10	)	$	(3	)	$	(7	)
OCI before realized gains and losses recognized in net   income	1			—			1			(4		)	(1		)	(3		)
Realized gains and losses recognized in net income	(3		)	(1		)	(2		)	1			1			—
OCI	(2		)	(1		)	(1		)	(3		)	—			(3		)
AOCI, end of period	$	(8	)	$	(3	)	$	(5	)	$	(13	)	$	(3	)	$	(10	)
Summary of AOCI:
AOCI, beginning of period	$	2,946		$	1,021		$	1,925		$	2,623		$	909		$	1,714
Investments OCI	189			66			123			62			21			41
Pension obligations OCI	1			1			—			—			—			—
Life deferred acquisition costs, life policy reserves and other OCI	(2		)	(1		)	(1		)	(3		)	—			(3		)
Total OCI	188			66			122			59			21			38
AOCI, end of period	$	3,134		$	1,087		$	2,047		$	2,682		$	930		$	1,752

(Dollars in millions)	Nine months ended September 30,
	2017									2016
	Before tax			Income tax			Net			Before tax			Income tax			Net
Investments:
AOCI, beginning of period	$	2,625		$	908		$	1,717		$	2,094		$	722		$	1,372
OCI before realized gains recognized in net income	694			243			451			801			280			521
Realized gains recognized in net income	(153		)	(54		)	(99		)	(160		)	(56		)	(104		)
OCI	541			189			352			641			224			417
AOCI, end of period	$	3,166		$	1,097		$	2,069		$	2,735		$	946		$	1,789
Pension obligations:
AOCI, beginning of period	$	(26	)	$	(8	)	$	(18	)	$	(42	)	$	(14	)	$	(28	)
OCI excluding amortization recognized in net income	—			—			—			—			—			—
Amortization recognized in net income	2			1			1			2			1			1
OCI	2			1			1			2			1			1
AOCI, end of period	$	(24	)	$	(7	)	$	(17	)	$	(40	)	$	(13	)	$	(27	)
Life deferred acquisition costs, life policy reserves and other:
AOCI, beginning of period	$	(9	)	$	(3	)	$	(6	)	$	1		$	1		$	—
OCI before realized gains and losses recognized in net   income	4			1			3			(13		)	(4		)	(9		)
Realized gains recognized in net income	(3		)	(1		)	(2		)	(1		)	—			(1		)
OCI	1			—			1			(14		)	(4		)	(10		)
AOCI, end of period	$	(8	)	$	(3	)	$	(5	)	$	(13	)	$	(3	)	$	(10	)
Summary of AOCI:
AOCI, beginning of period	$	2,590		$	897		$	1,693		$	2,053		$	709		$	1,344
Investments OCI	541			189			352			641			224			417
Pension obligations OCI	2			1			1			2			1			1
Life deferred acquisition costs, life policy reserves and other OCI	1			—			1			(14		)	(4		)	(10		)
Total OCI	544			190			354			629			221			408
AOCI, end of period	$	3,134		$	1,087		$	2,047		$	2,682		$	930		$	1,752

Investments realized gains and life deferred acquisition costs, life policy reserves and other realized gains are recorded in the realized investment gains, net, line item in the condensed consolidated statements of income. Amortization on pension obligations is recorded in the insurance losses and contract holders' benefits and underwriting, acquisition and insurance expenses in the condensed consolidated statements of income.

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Reinsurance

9 Months Ended

Sep. 30, 2017

Reinsurance Disclosures [Abstract]

Reinsurance

Reinsurance

Primary components of our property casualty reinsurance assumed include involuntary and voluntary assumed risks as well as contracts from our reinsurance assumed operations, known as Cincinnati Re. Primary components of our ceded reinsurance include a property per risk treaty, property excess treaty, casualty per occurrence treaty, casualty excess treaty, property catastrophe treaty and catastrophe bonds and retrocessions on our reinsurance assumed operations. Management's decisions about the appropriate level of risk retention are affected by various factors, including changes in our underwriting practices, capacity to retain risks and reinsurance market conditions.

The table below includes our net written consolidated property casualty insurance premiums on assumed and ceded business:

(Dollars in millions)	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Direct written premiums	$	1,221		$	1,189		$	3,712		$	3,561
Assumed written premiums	26			23			101			86
Ceded written premiums	(39		)	(37		)	(103		)	(131		)
Net written premiums	$	1,208		$	1,175		$	3,710		$	3,516

Our condensed consolidated statements of income include earned consolidated property casualty insurance premiums on assumed and ceded business: 

(Dollars in millions)	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Direct earned premiums	$	1,195		$	1,153		$	3,547		$	3,409
Assumed earned premiums	39			22			99			53
Ceded earned premiums	(43		)	(42		)	(123		)	(119		)
Earned premiums	$	1,191		$	1,133		$	3,523		$	3,343

Our condensed consolidated statements of income include incurred consolidated property casualty insurance loss and loss expenses on assumed and ceded business:

(Dollars in millions)	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Direct incurred loss and loss expenses	$	760		$	691		$	2,318		$	2,131
Assumed incurred loss and loss expenses	62			9			97			30
Ceded incurred loss and loss expenses	(7		)	(10		)	(18		)	(51		)
Incurred loss and loss expenses	$	815		$	690		$	2,397		$	2,110

Our life insurance company purchases reinsurance for protection of a portion of the risks that are written. Primary components of our life reinsurance program include individual mortality coverage, aggregate catastrophe and accidental death coverage in excess of certain deductibles.

Our condensed consolidated statements of income include earned life insurance premiums on ceded business: 

(Dollars in millions)	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Direct earned premiums	$	72		$	74		$	223		$	220
Ceded earned premiums	(16		)	(16		)	(50		)	(45		)
Earned premiums	$	56		$	58		$	173		$	175

Our condensed consolidated statements of income include life insurance contract holders' benefits incurred on ceded business: 

(Dollars in millions)	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Direct contract holders' benefits incurred	$	73		$	72		$	236		$	228
Ceded contract holders' benefits incurred	(14		)	(9		)	(52		)	(40		)
Contract holders' benefits incurred	$	59		$	63		$	184		$	188

The ceded benefits incurred can vary depending on the type of life insurance policy held and the year the policy was issued.

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Income Taxes

9 Months Ended

Sep. 30, 2017

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

As of September 30, 2017, and December 31, 2016, we had no liability for unrecognized tax benefits.

The differences between the 35 percent statutory federal income tax rate and our effective income tax rate were as follows:

(Dollars in millions)	Three months ended September 30,										Nine months ended September 30,
	2017					2016					2017					2016
Tax at statutory rate:	$	46		35.0	%	$	88		35.0	%	$	187		35.0	%	$	239		35.0	%
Increase (decrease) resulting from:
Tax-exempt income from municipal bonds	(9		)	(7.0	)	(8		)	(3.2	)	(27		)	(5.1	)	(25		)	(3.7	)
Dividend received exclusion	(8		)	(6.2	)	(8		)	(3.2	)	(25		)	(4.7	)	(24		)	(3.5	)
Other	(2		)	(0.9	)	1			0.3		(5		)	(0.8	)	3			0.4
Provision for income taxes	$	27		20.9	%	$	73		28.9	%	$	130		24.4	%	$	193		28.2	%

The provision for federal income taxes is based upon filing a consolidated income tax return for the company and its subsidiaries.

Included in Other above is the adoption of ASU 2016-09, Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting, which decreased both the provision for income taxes and the effective income tax rate by an immaterial amount during the three months ended September 30, 2017, and

$7 million and 1.3 percent, during the nine months ended September 30, 2017.

As of September 30, 2017, we had no operating or capital loss carry forwards.

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Net Income Per Common Share

9 Months Ended

Sep. 30, 2017

Earnings Per Share [Abstract]

Net Income Per Common Share

Basic earnings per share are computed based on the weighted average number of common shares outstanding. Diluted earnings per share are computed based on the weighted average number of common and dilutive potential common shares outstanding using the treasury stock method. The table shows calculations for basic and diluted earnings per share:

(In millions except per share data)	Three months ended September 30,				Nine months ended September 30,
	2017		2016		2017		2016
Numerator:
Net income—basic and diluted	$	102	$	180	$	403	$	491
Denominator:
Basic weighted-average common shares   outstanding	164.0		164.6		164.3		164.5
Effect of share-based awards:
Stock options	1.1		1.2		1.1		1.1
Nonvested shares	0.8		1.0		0.7		0.9
Diluted weighted-average shares	165.9		166.8		166.1		166.5
Earnings per share:
Basic	$	0.62	$	1.09	$	2.45	$	2.98
Diluted	0.61		1.08		2.42		2.95
Number of anti-dilutive share-based awards	0.6		—		0.7		0.3

The sources of dilution of our common shares are certain equity-based awards. See our 2016 Annual Report on Form 10-K, Item 8, Note 17, Share-Based Associate Compensation Plans, Page 160, for information about equity-based awards. The above table shows the number of anti-dilutive share-based awards for the three and nine months endedSeptember 30, 2017 and 2016. We did not include these share-based awards in the computation of net income per common share (diluted) because their exercise would have anti-dilutive effects.

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Employee Retirement Benefits

9 Months Ended

Sep. 30, 2017

Retirement Benefits [Abstract]

Employee Retirement Benefits

Employee Retirement Benefits

The following summarizes the components of net periodic benefit cost for our qualified and supplemental pension plans:

(Dollars in millions)	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Service cost	$	3		$	3		$	8		$	8
Interest cost	4			4			11			11
Expected return on plan assets	(6		)	(5		)	(16		)	(14		)
Amortization of actuarial loss and prior service  cost	1			0			2			2
Net periodic benefit cost	$	2		$	2		$	5		$	7

See our 2016 Annual Report on Form 10-K, Item 8, Note 13, Employee Retirement Benefits, Page 155, for information on our retirement benefits. We made matching contributions totaling $4 million and $3 million to our 401(k) and Top Hat savings plans during the third quarter of 2017 and 2016 and contributions of $13 million and

$11 million for the nine months of 2017 and 2016, respectively.

We contributed $5 million to our qualified pension plan during the first nine months of 2017.

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Commitments and Contingent Liabilities

9 Months Ended

Sep. 30, 2017

Commitments and Contingencies Disclosure [Abstract]

Commitments And Contingent Liabilities

Commitments and Contingent Liabilities

In the ordinary course of conducting business, the company and its subsidiaries are named as defendants in various legal proceedings. Most of these proceedings are claims litigation involving the company's insurance subsidiaries in which the company is either defending or providing indemnity for third-party claims brought against insureds or litigating first-party coverage claims. The company accounts for such activity through the establishment of unpaid loss and loss expense reserves. We believe that the ultimate liability, if any, with respect to such ordinary-course claims litigation, after consideration of provisions made for potential losses and costs of defense, is immaterial to our consolidated financial condition, results of operations and cash flows.

The company and its subsidiaries also are occasionally involved in other legal and regulatory proceedings, some of which assert claims for substantial amounts. These actions include, among others, putative class actions seeking certification of a state or national class. Such proceedings have alleged, for example, breach of an alleged duty to search national databases to ascertain unreported deaths of insureds under life insurance policies. The company's insurance subsidiaries also are occasionally parties to individual actions in which extra-contractual damages, punitive damages or penalties are sought, such as claims alleging bad faith handling of insurance claims or writing unauthorized coverage or claims alleging discrimination by former or current associates.

On a quarterly basis, we review these outstanding matters. Under current accounting guidance, we establish accruals when it is probable that a loss has been incurred and we can reasonably estimate its potential exposure. The company accounts for such probable and estimable losses, if any, through the establishment of legal expense reserves. Based on our quarterly review, we believe that our accruals for probable and estimable losses are reasonable and that the amounts accrued do not have a material effect on our consolidated financial condition or results of operations. However, if any one or more of these matters results in a judgment against us or settlement for an amount that is significantly greater than the amount accrued, the resulting liability could have a material effect on the company's consolidated results of operations or cash flows. Based on our most recent review, our estimate of losses for any other matters for which the risk of loss is not probable, but more than remote, is immaterial.

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Segment Information

9 Months Ended

Sep. 30, 2017

Segment Reporting [Abstract]

Segment Information

Segment Information

We operate primarily in two industries, property casualty insurance and life insurance. Our chief operating decision maker regularly reviews our reporting segments to make decisions about allocating resources and assessing performance. Our reporting segments are:

• Commercial lines insurance

• Personal lines insurance

• Excess and surplus lines insurance

• Life insurance

• Investments

We report as Other the noninvestment operations of the parent company and its noninsurer subsidiary, CFC Investment Company and Cincinnati Re, our reinsurance assumed operations. See our 2016 Annual Report on Form 10-K, Item 8, Note 18, Segment Information, Page 163, for a description of revenue, income or loss before income taxes and identifiable assets for each of the five segments.

Segment information is summarized in the following table: 

(Dollars in millions)	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Revenues:
Commercial lines insurance
Commercial casualty	$	268		$	265		$	804		$	785
Commercial property	225			217			674			646
Commercial auto	159			151			472			442
Workers' compensation	84			90			254			268
Other commercial	56			56			165			169
Commercial lines insurance premiums	792			779			2,369			2,310
Fee revenues	1			1			3			3
Total commercial lines insurance	793			780			2,372			2,313
Personal lines insurance
Personal auto	148			137			433			403
Homeowner	131			122			384			362
Other personal	35			34			104			99
Personal lines insurance premiums	314			293			921			864
Fee revenues	1			1			4			3
Total personal lines insurance	315			294			925			867
Excess and surplus lines insurance	53			48			153			136
Fee revenues	—			1			1			1
Total excess and surplus lines insurance	53			49			154			137
Life insurance premiums	56			58			173			175
Fee revenues	1			2			4			4
Total life insurance	57			60			177			179
Investments
Investment income, net of expenses	153			148			453			442
Realized investment gains and losses, net	7			56			156			161
Total investment revenue	160			204			609			603
Other
Cincinnati Re insurance premiums	32			13			80			33
Other	2			2			4			5
Total other revenues	34			15			84			38
Total revenues	$	1,412		$	1,402		$	4,321		$	4,137
Income (loss) before income taxes:
Insurance underwriting results
Commercial lines insurance	$	39		$	72		$	61		$	148
Personal lines insurance	(9		)	(8		)	(48		)	—
Excess and surplus lines insurance	13			20			50			42
Life insurance	(4		)	(4		)	—			(4		)
Investments	136			181			539			536
Other	(46		)	(8		)	(69		)	(38		)
Total income before income taxes	$	129		$	253		$	533		$	684

Identifiable assets:	September 30, 2017		December 31, 2016
Property casualty insurance	$	2,997	$	2,967
Life insurance	1,424		1,366
Investments	16,693		15,569
Other	478		484
Total	$	21,592	$	20,386

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Accounting Policies Pending Accounting Updates (Policies)

9 Months Ended

Sep. 30, 2017

Accounting Policies [Abstract]

Adopted Accounting Updates and Pending Accounting Updates

Adopted Accounting Updates

ASU 2016-07, Investments - Equity Method and Joint Ventures (Topic 323): Simplifying the Transition to the Equity Method of Accounting

In March 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2016-07, Equity Method and Joint Ventures (Topic 323): Simplifying the Transition to the Equity Method of Accounting. ASU 2016-07 eliminates the requirement to retroactively adjust an investment, results of operations, and retained earnings once an investment qualifies for use of the equity method. It requires the equity method investor to add the cost of acquiring the additional interest in the investee to the current basis of the investor's previously held interest and adopt the equity method of accounting as of the date the investment becomes qualified for equity method accounting without retroactive adjustment. The effective date of ASU 2016-07 was for interim and annual reporting periods beginning after December 15, 2016, and was applied prospectively. The company adopted this ASU effective January 1, 2017, and it did not have a material impact on our company's consolidated financial position, cash flows or results of operations.

ASU 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting

In March 2016, the FASB issued ASU 2016-09, Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. ASU 2016-09 simplifies several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. The effective date of ASU 2016-09 was for interim and annual reporting periods beginning after December 15, 2016. The recognition and classification of the excess tax benefit provisions were applied prospectively in the results of operations and statement of cash flows. This adoption resulted in excess tax benefits of an immaterial amount for the three months ended September 30, 2017, and

$7 million for the nine months ended September 30, 2017, which reduced our current provision for income taxes in our results of operations. The statutory tax withholding classification, which are cash payments made to taxing authorities for shares withheld, were applied retrospectively and reclassified the statutory tax withholding requirements in the statement of cash flows from Other liabilities in operating activities to Other in financing activities. This statutory tax withholding reclassification resulted in $13 million and $11 million being included in financing activities for the nine months ended September 30, 2017 and 2016, respectively. There were no cumulative effect adjustments upon adoption of this ASU.

Pending Accounting Updates

ASU 2014-09 Revenue from Contracts with Customers

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers. ASU 2014-09 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 and services. Insurance contracts do not fall within the scope of this ASU. The effective date of ASU 2014-09 is for interim and annual reporting periods beginning after December 15, 2017. The ASU has not yet been adopted and will not have a material impact on our company’s financial position, cash flows or results of operations.

ASU 2016-01, Financial Instruments - Overall (Subtopic 825-10) - Recognition and Measurement of Financial Assets and Financial Liabilities

In January 2016, the FASB issued ASU 2016-01, Financial Instruments - Overall (Subtopic 825-10) - Recognition and Measurement of Financial Assets and Financial Liabilities. ASU 2016-01 revises the accounting related to the classification and measurement of investments in equity securities and the presentation of certain fair value changes for financial liabilities measured at fair value. Our results of operations will be impacted as changes in fair value of equity securities will be reported in net income instead of reported in other comprehensive income. The effective date of ASU 2016-01 is for interim and annual reporting periods beginning after December 15, 2017, and will be applied prospectively. The ASU has not yet been adopted. Had we adopted this ASU on September 30, 2017, $1.795 billion of after-tax unrealized gains on equity securities would have been reclassified from accumulated other comprehensive income to retained earnings. The actual amount reclassified upon adoption will vary depending on the future changes in fair value of our equity portfolio.

ASU 2016-02, Leases (Topic 842)

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). The main provision of ASU 2016-02 requires the recognition of lease assets and lease liabilities by lessees for those leases classified as operating leases under previous GAAP. The effective date of ASU 2016-02 is for interim and annual reporting periods beginning after December 15, 2018. The ASU has not yet been adopted. Management is currently evaluating the impact on our company’s consolidated financial position, cash flows and results of operations.

ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments

In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. ASU 2016-13 amends previous guidance on the impairment of financial instruments by adding an impairment model that allows an entity to recognize expected credit losses as an allowance rather than impairing as they are incurred. The new guidance is intended to reduce complexity of credit impairment models and result in a more timely recognition of expected credit losses. The effective date of ASU 2016-13 is for interim and annual reporting periods beginning after December 15, 2019. The ASU has not yet been adopted. Management is currently evaluating the impact on our company's consolidated financial position, cash flows or results of operations.

ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments

In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. ASU 2016-15 addresses eight specific cash flow issues with the objective of reducing the existing diversity in practice. The effective date of ASU 2016-15 is for interim and annual reporting periods beginning after December 15, 2017. The ASU has not yet been adopted; however, it will not have a material impact on our company's consolidated financial position, cash flows or results of operations.

ASU 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost

In March 2017, the FASB issued ASU 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Postretirement Benefit Costs. ASU 2017-07 provides guidance on how to present the components of net periodic benefit costs in the income statement for pension plans and other post-retirement benefit plans. The effective date of ASU 2017-07 is for interim and annual reporting periods beginning after December 15, 2017. The ASU has not yet been adopted; however, it will not have a material impact on our company's consolidated financial position, cash flows or results of operations.

ASU 2017-08, Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities

In March 2017, the FASB issued ASU 2017-08, Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities. ASU 2017-08 amends guidance on the amortization period of premiums on certain purchased callable debt securities. The amendments shorten the amortization period of premiums on certain purchased callable debt securities to the earliest call date. The amendments should be applied on a modified retrospective basis through a cumulative-effect adjustment to beginning retained earnings. The effective date of ASU 2017-08 is for interim and annual reporting periods beginning after December 15, 2018. The ASU has not yet been adopted; however, it is not expected to have a material impact on our company's consolidated financial position, cash flows or results of operations.

ASU 2017-09, Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting

In May 2017, the FASB issued ASU 2017-09, Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting. ASU 2017-09 clarifies when to account for a change to the terms or conditions of a share-based payment award as a modification. Under the new guidance, modification accounting is required only if the fair value, the vesting conditions, or the classification of the award (as equity or liability) changes as a result of the change in terms or conditions. The amendment should be applied on a prospective basis. The effective date of ASU 2017-09 is for interim and annual reporting periods, beginning after December 15, 2017. The ASU has not yet been adopted; however, it will not have a material impact on our company's consolidated financial position, cash flows or results of operations upon adoption.

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Investments (Tables)

9 Months Ended

Sep. 30, 2017

Investments [Abstract]

Analysis Of Cost Or Amortized Cost, Gross Unrealized Gains And Losses And Fair Value for Investments

The following table provides cost or amortized cost, gross unrealized gains, gross unrealized losses and fair value for our fixed-maturity and equity securities:

(Dollars in millions)	Cost or amortized cost
			Gross unrealized				Fair value
At September 30, 2017			gains		losses
Fixed maturity securities:
Corporate	$	5,514	$	280	$	11	$	5,783
States, municipalities and political subdivisions	4,103		144		13		4,234
Commercial mortgage-backed	280		8		—		288
Government-sponsored enterprises	207		—		3		204
United States government	16		—		—		16
Foreign government	10		—		—		10
Convertibles and bonds with warrants attached	5		—		—		5
Subtotal	10,135		432		27		10,540
Equity securities:
Common equities	3,084		2,762		38		5,808
Nonredeemable preferred equities	180		37		—		217
Subtotal	3,264		2,799		38		6,025
Total	$	13,399	$	3,231	$	65	$	16,565
At December 31, 2016
Fixed maturity securities:
Corporate	$	5,555	$	252	$	26	$	5,781
States, municipalities and political subdivisions	3,770		100		42		3,828
Commercial mortgage-backed	282		7		2		287
Government-sponsored enterprises	167		—		3		164
United States government	10		—		—		10
Foreign government	10		—		—		10
Convertibles and bonds with warrants attached	5		—		—		5
Subtotal	9,799		359		73		10,085
Equity securities:
Common equities	2,812		2,320		9		5,123
Nonredeemable preferred equities	183		28		—		211
Subtotal	2,995		2,348		9		5,334
Total	$	12,794	$	2,707	$	82	$	15,419

Fair Values And Unrealized Losses by Investment Category And By The Duration Of The Securities' Continuous Unrealized Loss Position

The table below provides fair values and gross unrealized losses by investment category and by the duration of the securities’ continuous unrealized loss positions:

(Dollars in millions)	Less than 12 months				12 months or more				Total
	Fair value		Unrealized losses		Fair value		Unrealized losses		Fair value		Unrealized losses
At September 30, 2017
Fixed maturity securities:
Corporate	$	231	$	4	$	193	$	7	$	424	$	11
States, municipalities and political subdivisions	508		8		122		5		630		13
Commercial mortgage-backed securities	43		—		3		—		46		—
Government-sponsored enterprises	152		3		43		—		195		3
United States government	7		—		—		—		7		—
Subtotal	941		15		361		12		1,302		27
Equity securities:
Common equities	276		38		—		—		276		38
Subtotal	276		38		—		—		276		38
Total	$	1,217	$	53	$	361	$	12	$	1,578	$	65
At December 31, 2016
Fixed maturity securities:
Corporate	$	733	$	15	$	189	$	11	$	922	$	26
States, municipalities and political subdivisions	989		42		—		—		989		42
Commercial mortgage-backed	89		2		2		—		91		2
Government-sponsored enterprises	155		3		—		—		155		3
United States government	6		—		—		—		6		—
Subtotal	1,972		62		191		11		2,163		73
Equity securities:
Common equities	103		9		—		—		103		9
Nonredeemable preferred equities	4		—		—		—		4		—
Subtotal	107		9		—		—		107		9
Total	$	2,079	$	71	$	191	$	11	$	2,270	$	82

Investments Classified by Contractual Maturity Date [Table Text Block]

Contractual maturity dates for fixed-maturity investments were:

(Dollars in millions)	Amortized cost		Fair value		% of fair value
At September 30, 2017
Maturity dates:
Due in one year or less	$	674	$	686	6.5	%
Due after one year through five years	2,668		2,803		26.6
Due after five years through ten years	3,853		4,009		38.0
Due after ten years	2,940		3,042		28.9
Total	$	10,135	$	10,540	100.0	%

Investment Income, Realized Investment Gains And Losses And Change In Unrealized Investment Gains And Losses

The following table provides investment income, realized investment gains and losses, the change in unrealized investment gains and losses:

(Dollars in millions)	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Investment income:
Interest	$	112		$	111		$	334		$	330
Dividends	43			39			124			117
Other	1			1			3			2
Total	156			151			461			449
Less investment expenses	3			3			8			7
Total	$	153		$	148		$	453		$	442
Realized investment gains and losses:
Fixed maturities:
Gross realized gains	$	3		$	10		$	16		$	17
Gross realized losses	—			—			—			(1		)
Other-than-temporary impairments	—			—			(6		)	(2		)
Equity securities:
Gross realized gains	1			47			160			147
Gross realized losses	—			—			(14		)	(1		)
Other-than-temporary impairments	—			—			(3		)	—
Other	3			(1		)	3			1
Total	$	7		$	56		$	156		$	161
Change in unrealized investment gains and losses:
Fixed maturities	$	9		$	(20	)	$	119		$	274
Equity securities	180			82			422			367
Income tax provision	(66		)	(21		)	(189		)	(224		)
Total	$	123		$	41		$	352		$	417

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Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2017

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

Fair Value Hierarchy for Assets Measured at Fair Value on a Recurring Basis

The following tables illustrate the fair value hierarchy for those assets measured at fair value on a recurring basis at September 30, 2017, and December 31, 2016. We do not have any material liabilities carried at fair value. There were no transfers between Level 1 and Level 2.

(Dollars in millions)	Quoted prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)		Total
At September 30, 2017
Fixed maturities, available for sale:
Corporate	$	—	$	5,782	$	1	$	5,783
States, municipalities and political subdivisions	—		4,229		5		4,234
Commercial mortgage-backed	—		288		—		288
Government-sponsored enterprises	—		204		—		204
United States government	16		—		—		16
Foreign government	—		10		—		10
Convertibles and bonds with warrants attached	—		5		—		5
Subtotal	16		10,518		6		10,540
Common equities, available for sale	5,808		—		—		5,808
Nonredeemable preferred equities, available for sale	—		217		—		217
Separate accounts taxable fixed maturities	—		783		—		783
Top Hat savings plan mutual funds and common equity (included in Other assets)	30		—		—		30
Total	$	5,854	$	11,518	$	6	$	17,378
At December 31, 2016
Fixed maturities, available for sale:
Corporate	$	—	$	5,703	$	78	$	5,781
States, municipalities and political subdivisions	—		3,828		—		3,828
Commercial mortgage-backed	—		287		—		287
Government-sponsored enterprises	—		164		—		164
United States government	10		—		—		10
Foreign government	—		10		—		10
Convertibles and bonds with warrants attached	—		5		—		5
Subtotal	10		9,997		78		10,085
Common equities, available for sale	5,123		—		—		5,123
Nonredeemable preferred equities, available for sale	—		211		—		211
Separate accounts taxable fixed maturities	—		750		—		750
Top Hat savings plan mutual funds and common   equity (included in Other assets)	24		—		—		24
Total	$	5,157	$	10,958	$	78	$	16,193

Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)

(Dollars in millions)	Asset fair value measurements using significant unobservable inputs (Level 3)
	Corporate fixed maturities			Taxable fixed maturities - separate accounts			States, municipalities and political subdivisions fixed maturities		Nonredeemable preferred equities		Total
Beginning balance, July 1, 2017	$	1		$	—		$	5	$	—	$	6
Total gains or losses (realized/unrealized):
Included in net income	—			—			—		—		—
Included in other comprehensive income	—			—			—		—		—
Purchases	—			—			—		—		—
Sales	—			—			—		—		—
Transfers into Level 3	—			—			—		—		—
Transfers out of Level 3	—			—			—		—		—
Ending balance, September 30, 2017	$	1		$	—		$	5	$	—	$	6
Beginning balance, July 1, 2016	$	52		$	1		$	—	$	—	$	53
Total gains or losses (realized/unrealized):
Included in net income	—			—			—		—		—
Included in other comprehensive income	1			—			—		—		1
Purchases	—			—			—		—		—
Sales	(1		)	—			—		—		(1		)
Transfers into Level 3	—			—			—		—		—
Transfers out of Level 3	(10		)	(1		)	—		—		(11		)
Ending balance, September 30, 2016	$	42		$	—		$	—	$	—	$	42

The following table provides the change in Level 3 assets for the nine months ended September 30:

(Dollars in millions)	Asset fair value measurements using significant unobservable inputs
		Corporate fixed maturities			Taxable fixed maturities - separate accounts			States, municipalities and political subdivisions fixed maturities		Nonredeemable preferred equities			Total
Beginning balance, January 1, 2017		$	78		$	—		$	—	$	—		$	78
Total gains or losses (realized/unrealized):
Included in net income		—			—			—		—			—
Included in other comprehensive income		—			—			—		—			—
Purchases		—			—			5		—			5
Sales		—			—			—		—			—
Transfers into Level 3		—			—			—		—			—
Transfers out of Level 3		(77		)	—			—		—			(77		)
Ending balance, September 30, 2017		$	1		$	—		$	5	$	—		$	6
Beginning balance, January 1, 2016		$	51		$	1		$	—	$	3		$	55
Total gains or losses (realized/unrealized):
Included in net income		—			—			—		—			—
Included in other comprehensive income		1			—			—		(1		)	—
Purchases		22			—			—		—			22
Sales		(1		)	—			—		(2		)	(3		)
Transfers into Level 3		—			—			—		—			—
Transfers out of Level 3		(31		)	(1		)	—		—			(32		)
Ending balance, September 30, 2016		$	42		$	—		$	—	$	—		$	42

Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block]

This table summarizes the book value and principal amounts of our long-term debt:

(Dollars in millions)				Book value				Principal amount
Interest rate		Year of  issue		September 30,		December 31,		September 30,		December 31,
				2017		2016		2017		2016
6.900	%	1998	Senior debentures, due 2028	$	26	$	26	$	28	$	28
6.920	%	2005	Senior debentures, due 2028	391		391		391		391
6.125	%	2004	Senior notes, due 2034	370		370		374		374
			Total	$	787	$	787	$	793	$	793

Fair Value of Life Policy Loans

The following table shows the fair value of our life policy loans included in other invested assets:

(Dollars in millions)	Quoted prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)		Total
At September 30, 2017
Life policy loans	$	—	$	—	$	41	$	41
At December 31, 2016
Life policy loans	$	—	$	—	$	40	$	40

Debt

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

Fair Values of Deferred Annuities, Structured Settlements and Other Items

The following table shows fair values of our note payable and long-term debt:

(Dollars in millions)	Quoted prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)		Total
At September 30, 2017
Note payable	$	—	$	17	$	—	$	17
6.900% senior debentures, due 2028	—		34		—		34
6.920% senior debentures, due 2028	—		503		—		503
6.125% senior notes, due 2034	—		459		—		459
Total	$	—	$	1,013	$	—	$	1,013
At December 31, 2016
Note payable	$	—	$	20	$	—	$	20
6.900% senior debentures, due 2028	—		33		—		33
6.920% senior debentures, due 2028	—		488		—		488
6.125% senior notes, due 2034	—		435		—		435
Total	$	—	$	976	$	—	$	976

Deferred Annuities, Structured Settlements, And Other

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

Fair Values of Deferred Annuities, Structured Settlements and Other Items

The following table shows fair values of our deferred annuities and structured settlements included in life policy and investment contract reserves:

(Dollars in millions)	Quoted prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)		Total
At September 30, 2017
Deferred annuities	$	—	$	—	$	846	$	846
Structured settlements	—		209		—		209
Total	$	—	$	209	$	846	$	1,055
At December 31, 2016
Deferred annuities	$	—	$	—	$	839	$	839
Structured settlements	—		206		—		206
Total	$	—	$	206	$	839	$	1,045

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Property Casualty Loss and Loss Expenses (Tables)

9 Months Ended

Sep. 30, 2017

Premiums Written, Net [Abstract]

Consolidated Property Casualty Loss And Loss Expense Reserves

This table summarizes activity for our consolidated property casualty loss and loss expense reserves:

(Dollars in millions)	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Gross loss and loss expense reserves, beginning   of period	$	5,213		$	4,918		$	5,035		$	4,660
Less reinsurance recoverable	283			310			298			281
Net loss and loss expense reserves, beginning of   period	4,930			4,608			4,737			4,379
Net incurred loss and loss expenses related to:
Current accident year	835			730			2,493			2,261
Prior accident years	(20		)	(40		)	(96		)	(151		)
Total incurred	815			690			2,397			2,110
Net paid loss and loss expenses related to:
Current accident year	411			374			969			848
Prior accident years	314			288			1,145			1,005
Total paid	725			662			2,114			1,853
Net loss and loss expense reserves, end of period	5,020			4,636			5,020			4,636
Plus reinsurance recoverable	280			301			280			301
Gross loss and loss expense reserves, end of   period	$	5,300		$	4,937		$	5,300		$	4,937

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Life Policy and Investment Contract Reserves (Tables)

9 Months Ended

Sep. 30, 2017

Liability for Future Policy Benefits [Abstract]

Reserve For Losses Loss Adjustment Expenses Table [Text Block]

This table summarizes our life policy and investment contract reserves:

(Dollars in millions)	September 30, 2017		December 31, 2016
Life policy reserves:
Ordinary/traditional life	$	1,063	$	1,011
Other	46		45
Subtotal	1,109		1,056
Investment contract reserves:
Deferred annuities	844		861
Universal life	594		578
Structured settlements	163		170
Other	6		6
Subtotal	1,607		1,615
Total life policy and investment contract reserves	$	2,716	$	2,671

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Deferred Acquisition Costs (Tables)

9 Months Ended

Sep. 30, 2017

Deferred Costs [Abstract]

Deferred Policy Acquisition Costs And Asset Reconciliation, Including the Amortized Deferred Policy Acquisition Costs

The table below shows the deferred policy acquisition costs and asset reconciliation.

(Dollars in millions)	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Property casualty:
Deferred policy acquisition costs asset, beginning of period	$	448		$	412		$	408		$	388
Capitalized deferred policy acquisition costs	223			216			686			644
Amortized deferred policy acquisition costs	(220		)	(207		)	(643		)	(611		)
Deferred policy acquisition costs asset, end of period	$	451		$	421		$	451		$	421
Life:
Deferred policy acquisition costs asset, beginning of period	$	230		$	212		$	229		$	228
Capitalized deferred policy acquisition costs	13			11			38			35
Amortized deferred policy acquisition costs	(17		)	(15		)	(37		)	(37		)
Amortized shadow deferred policy acquisition costs	(1		)	(2		)	(5		)	(20		)
Deferred policy acquisition costs asset, end of period	$	225		$	206		$	225		$	206
Consolidated:
Deferred policy acquisition costs asset, beginning of period	$	678		$	624		$	637		$	616
Capitalized deferred policy acquisition costs	236			227			724			679
Amortized deferred policy acquisition costs	(237		)	(222		)	(680		)	(648		)
Amortized shadow deferred policy acquisition costs	(1		)	(2		)	(5		)	(20		)
Deferred policy acquisition costs asset, end of period	$	676		$	627		$	676		$	627

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Accumulated Other Comprehensive Income (Tables)

9 Months Ended

Sep. 30, 2017

Accumulated Other Comprehensive Income [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

(Dollars in millions)	Three months ended September 30,
	2017									2016
	Before tax			Income tax			Net			Before tax			Income tax			Net
Investments:
AOCI, beginning of period	$	2,977		$	1,031		$	1,946		$	2,673		$	925		$	1,748
OCI before realized gains recognized in net income	193			67			126			119			41			78
Realized gains recognized in net income	(4		)	(1		)	(3		)	(57		)	(20		)	(37		)
OCI	189			66			123			62			21			41
AOCI, end of period	$	3,166		$	1,097		$	2,069		$	2,735		$	946		$	1,789
Pension obligations:
AOCI, beginning of period	$	(25	)	$	(8	)	$	(17	)	$	(40	)	$	(13	)	$	(27	)
OCI excluding amortization recognized in net income	—			—			—			—			—			—
Amortization recognized in net income	1			1			—			—			—			—
OCI	1			1			—			—			—			—
AOCI, end of period	$	(24	)	$	(7	)	$	(17	)	$	(40	)	$	(13	)	$	(27	)
Life deferred acquisition costs, life policy reserves and other:
AOCI, beginning of period	$	(6	)	$	(2	)	$	(4	)	$	(10	)	$	(3	)	$	(7	)
OCI before realized gains and losses recognized in net   income	1			—			1			(4		)	(1		)	(3		)
Realized gains and losses recognized in net income	(3		)	(1		)	(2		)	1			1			—
OCI	(2		)	(1		)	(1		)	(3		)	—			(3		)
AOCI, end of period	$	(8	)	$	(3	)	$	(5	)	$	(13	)	$	(3	)	$	(10	)
Summary of AOCI:
AOCI, beginning of period	$	2,946		$	1,021		$	1,925		$	2,623		$	909		$	1,714
Investments OCI	189			66			123			62			21			41
Pension obligations OCI	1			1			—			—			—			—
Life deferred acquisition costs, life policy reserves and other OCI	(2		)	(1		)	(1		)	(3		)	—			(3		)
Total OCI	188			66			122			59			21			38
AOCI, end of period	$	3,134		$	1,087		$	2,047		$	2,682		$	930		$	1,752

(Dollars in millions)	Nine months ended September 30,
	2017									2016
	Before tax			Income tax			Net			Before tax			Income tax			Net
Investments:
AOCI, beginning of period	$	2,625		$	908		$	1,717		$	2,094		$	722		$	1,372
OCI before realized gains recognized in net income	694			243			451			801			280			521
Realized gains recognized in net income	(153		)	(54		)	(99		)	(160		)	(56		)	(104		)
OCI	541			189			352			641			224			417
AOCI, end of period	$	3,166		$	1,097		$	2,069		$	2,735		$	946		$	1,789
Pension obligations:
AOCI, beginning of period	$	(26	)	$	(8	)	$	(18	)	$	(42	)	$	(14	)	$	(28	)
OCI excluding amortization recognized in net income	—			—			—			—			—			—
Amortization recognized in net income	2			1			1			2			1			1
OCI	2			1			1			2			1			1
AOCI, end of period	$	(24	)	$	(7	)	$	(17	)	$	(40	)	$	(13	)	$	(27	)
Life deferred acquisition costs, life policy reserves and other:
AOCI, beginning of period	$	(9	)	$	(3	)	$	(6	)	$	1		$	1		$	—
OCI before realized gains and losses recognized in net   income	4			1			3			(13		)	(4		)	(9		)
Realized gains recognized in net income	(3		)	(1		)	(2		)	(1		)	—			(1		)
OCI	1			—			1			(14		)	(4		)	(10		)
AOCI, end of period	$	(8	)	$	(3	)	$	(5	)	$	(13	)	$	(3	)	$	(10	)
Summary of AOCI:
AOCI, beginning of period	$	2,590		$	897		$	1,693		$	2,053		$	709		$	1,344
Investments OCI	541			189			352			641			224			417
Pension obligations OCI	2			1			1			2			1			1
Life deferred acquisition costs, life policy reserves and other OCI	1			—			1			(14		)	(4		)	(10		)
Total OCI	544			190			354			629			221			408
AOCI, end of period	$	3,134		$	1,087		$	2,047		$	2,682		$	930		$	1,752

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Reinsurance (Tables)

9 Months Ended

Sep. 30, 2017

Reinsurance Disclosures [Abstract]

Property Casualty Insurance Premiums Written On Assumed And Ceded Business

The table below includes our net written consolidated property casualty insurance premiums on assumed and ceded business:

(Dollars in millions)	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Direct written premiums	$	1,221		$	1,189		$	3,712		$	3,561
Assumed written premiums	26			23			101			86
Ceded written premiums	(39		)	(37		)	(103		)	(131		)
Net written premiums	$	1,208		$	1,175		$	3,710		$	3,516

Earned Consolidated Property Casualty Insurance Premiums On Assumed And Ceded Business

Our condensed consolidated statements of income include earned consolidated property casualty insurance premiums on assumed and ceded business: 

(Dollars in millions)	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Direct earned premiums	$	1,195		$	1,153		$	3,547		$	3,409
Assumed earned premiums	39			22			99			53
Ceded earned premiums	(43		)	(42		)	(123		)	(119		)
Earned premiums	$	1,191		$	1,133		$	3,523		$	3,343

Incurred Consolidated Property Casualty Insurance Loss And Loss Expenses On Assumed And Ceded Business

Our condensed consolidated statements of income include incurred consolidated property casualty insurance loss and loss expenses on assumed and ceded business:

(Dollars in millions)	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Direct incurred loss and loss expenses	$	760		$	691		$	2,318		$	2,131
Assumed incurred loss and loss expenses	62			9			97			30
Ceded incurred loss and loss expenses	(7		)	(10		)	(18		)	(51		)
Incurred loss and loss expenses	$	815		$	690		$	2,397		$	2,110

Earned Life Insurance Premiums On Ceded Business

Our condensed consolidated statements of income include earned life insurance premiums on ceded business: 

(Dollars in millions)	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Direct earned premiums	$	72		$	74		$	223		$	220
Ceded earned premiums	(16		)	(16		)	(50		)	(45		)
Earned premiums	$	56		$	58		$	173		$	175

Life Insurance Contract Holders' Benefits Incurred On Ceded Business

Our condensed consolidated statements of income include life insurance contract holders' benefits incurred on ceded business: 

(Dollars in millions)	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Direct contract holders' benefits incurred	$	73		$	72		$	236		$	228
Ceded contract holders' benefits incurred	(14		)	(9		)	(52		)	(40		)
Contract holders' benefits incurred	$	59		$	63		$	184		$	188

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Income Taxes (Tables)

9 Months Ended

Sep. 30, 2017

Income Tax Disclosure [Abstract]

Differences Between The 35 Percent Statutory Income Tax Rate And Effective Income Tax Rate

The differences between the 35 percent statutory federal income tax rate and our effective income tax rate were as follows:

(Dollars in millions)	Three months ended September 30,										Nine months ended September 30,
	2017					2016					2017					2016
Tax at statutory rate:	$	46		35.0	%	$	88		35.0	%	$	187		35.0	%	$	239		35.0	%
Increase (decrease) resulting from:
Tax-exempt income from municipal bonds	(9		)	(7.0	)	(8		)	(3.2	)	(27		)	(5.1	)	(25		)	(3.7	)
Dividend received exclusion	(8		)	(6.2	)	(8		)	(3.2	)	(25		)	(4.7	)	(24		)	(3.5	)
Other	(2		)	(0.9	)	1			0.3		(5		)	(0.8	)	3			0.4
Provision for income taxes	$	27		20.9	%	$	73		28.9	%	$	130		24.4	%	$	193		28.2	%

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Net Income Per Common Share (Tables)

9 Months Ended

Sep. 30, 2017

Earnings Per Share [Abstract]

Calculations For Basic And Diluted Earnings Per Share

The table shows calculations for basic and diluted earnings per share:

(In millions except per share data)	Three months ended September 30,				Nine months ended September 30,
	2017		2016		2017		2016
Numerator:
Net income—basic and diluted	$	102	$	180	$	403	$	491
Denominator:
Basic weighted-average common shares   outstanding	164.0		164.6		164.3		164.5
Effect of share-based awards:
Stock options	1.1		1.2		1.1		1.1
Nonvested shares	0.8		1.0		0.7		0.9
Diluted weighted-average shares	165.9		166.8		166.1		166.5
Earnings per share:
Basic	$	0.62	$	1.09	$	2.45	$	2.98
Diluted	0.61		1.08		2.42		2.95
Number of anti-dilutive share-based awards	0.6		—		0.7		0.3

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Employee Retirement Benefits (Tables)

9 Months Ended

Sep. 30, 2017

Retirement Benefits [Abstract]

Schedule of Defined Benefit Plans Disclosures

The following summarizes the components of net periodic benefit cost for our qualified and supplemental pension plans:

(Dollars in millions)	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Service cost	$	3		$	3		$	8		$	8
Interest cost	4			4			11			11
Expected return on plan assets	(6		)	(5		)	(16		)	(14		)
Amortization of actuarial loss and prior service  cost	1			0			2			2
Net periodic benefit cost	$	2		$	2		$	5		$	7

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Segment Information (Tables)

9 Months Ended

Sep. 30, 2017

Segment Reporting [Abstract]

Segment Information

Segment information is summarized in the following table: 

(Dollars in millions)	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Revenues:
Commercial lines insurance
Commercial casualty	$	268		$	265		$	804		$	785
Commercial property	225			217			674			646
Commercial auto	159			151			472			442
Workers' compensation	84			90			254			268
Other commercial	56			56			165			169
Commercial lines insurance premiums	792			779			2,369			2,310
Fee revenues	1			1			3			3
Total commercial lines insurance	793			780			2,372			2,313
Personal lines insurance
Personal auto	148			137			433			403
Homeowner	131			122			384			362
Other personal	35			34			104			99
Personal lines insurance premiums	314			293			921			864
Fee revenues	1			1			4			3
Total personal lines insurance	315			294			925			867
Excess and surplus lines insurance	53			48			153			136
Fee revenues	—			1			1			1
Total excess and surplus lines insurance	53			49			154			137
Life insurance premiums	56			58			173			175
Fee revenues	1			2			4			4
Total life insurance	57			60			177			179
Investments
Investment income, net of expenses	153			148			453			442
Realized investment gains and losses, net	7			56			156			161
Total investment revenue	160			204			609			603
Other
Cincinnati Re insurance premiums	32			13			80			33
Other	2			2			4			5
Total other revenues	34			15			84			38
Total revenues	$	1,412		$	1,402		$	4,321		$	4,137
Income (loss) before income taxes:
Insurance underwriting results
Commercial lines insurance	$	39		$	72		$	61		$	148
Personal lines insurance	(9		)	(8		)	(48		)	—
Excess and surplus lines insurance	13			20			50			42
Life insurance	(4		)	(4		)	—			(4		)
Investments	136			181			539			536
Other	(46		)	(8		)	(69		)	(38		)
Total income before income taxes	$	129		$	253		$	533		$	684

Identifiable assets:	September 30, 2017		December 31, 2016
Property casualty insurance	$	2,997	$	2,967
Life insurance	1,424		1,366
Investments	16,693		15,569
Other	478		484
Total	$	21,592	$	20,386

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Accounting Policies (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification included in financing activities	$ (390)	$ (293)
Excess tax benefit	7
Available-for-sale Equity Securities, Unrealized Gain, After Tax	1,795
Accounting Standards Update 2016-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification included in financing activities	13	$ 11
Cumulative effect adjustment	$ 0

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Investments - Analysis of Cost or Amortized Cost, Gross Unrealized Gains and Losses and Fair Value for Investments (Detail) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Debt Securities
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	$ 10,135	$ 9,799
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	432	359
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	27	73
Fair Value	10,540	10,085
Debt Securities | Corporate
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	5,514	5,555
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	280	252
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	11	26
Fair Value	5,783	5,781
Debt Securities | States, municipalities and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	4,103	3,770
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	144	100
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	13	42
Fair Value	4,234	3,828
Debt Securities | Commercial mortgage-backed
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	280	282
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	8	7
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	0	2
Fair Value	288	287
Debt Securities | Government-sponsored enterprises
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	207	167
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	0	0
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	3	3
Fair Value	204	164
Debt Securities | United States government
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	16	10
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	0	0
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	0	0
Fair Value	16	10
Debt Securities | Foreign government
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	10	10
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	0	0
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	0	0
Fair Value	10	10
Debt Securities | Convertibles and bonds with warrants attached
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	5	5
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	0	0
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	0	0
Fair Value	5	5
Equity securities
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	3,264	2,995
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	2,799	2,348
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	38	9
Fair Value	6,025	5,334
Equity securities | Common equities
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	3,084	2,812
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	2,762	2,320
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	38	9
Fair Value	5,808	5,123
Equity securities | Nonredeemable preferred equities
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	180	183
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	37	28
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	0	0
Fair Value	217	211
Fixed Maturities And Equity Securities
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	13,399	12,794
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	3,231	2,707
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	65	82
Fair Value	$ 16,565	$ 15,419

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Investments - Fair Values and Unrealized Losses by Investment Category and by Duration of Securities' Continuous Unrealized Loss Position (Detail) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair Value	$ 1,217	$ 2,079
Less than 12 months Unrealized Losses	53	71
12 months or more Fair Value	361	191
12 months or more Unrealized Losses	12	11
Total Fair Value	1,578	2,270
Total Unrealized Losses	65	82
Fixed maturities
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair Value	941	1,972
Less than 12 months Unrealized Losses	15	62
12 months or more Fair Value	361	191
12 months or more Unrealized Losses	12	11
Total Fair Value	1,302	2,163
Total Unrealized Losses	27	73
Fixed maturities | Corporate
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair Value	231	733
Less than 12 months Unrealized Losses	4	15
12 months or more Fair Value	193	189
12 months or more Unrealized Losses	7	11
Total Fair Value	424	922
Total Unrealized Losses	11	26
Fixed maturities | States, municipalities and political subdivisions
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair Value	508	989
Less than 12 months Unrealized Losses	8	42
12 months or more Fair Value	122	0
12 months or more Unrealized Losses	5	0
Total Fair Value	630	989
Total Unrealized Losses	13	42
Fixed maturities | Commercial mortgage-backed
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair Value	43	89
Less than 12 months Unrealized Losses	0	2
12 months or more Fair Value	3	2
12 months or more Unrealized Losses	0	0
Total Fair Value	46	91
Total Unrealized Losses	0	2
Fixed maturities | Government-sponsored enterprises
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair Value	152	155
Less than 12 months Unrealized Losses	3	3
12 months or more Fair Value	43	0
12 months or more Unrealized Losses	0	0
Total Fair Value	195	155
Total Unrealized Losses	3	3
Fixed maturities | United States government
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair Value	7	6
Less than 12 months Unrealized Losses	0	0
12 months or more Fair Value	0	0
12 months or more Unrealized Losses	0	0
Total Fair Value	7	6
Total Unrealized Losses	0	0
Equity securities
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair Value	276	107
Less than 12 months Unrealized Losses	38	9
12 months or more Fair Value	0	0
12 months or more Unrealized Losses	0	0
Total Fair Value	276	107
Total Unrealized Losses	38	9
Equity securities | Common equities
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair Value	276	103
Less than 12 months Unrealized Losses	38	9
12 months or more Fair Value	0	0
12 months or more Unrealized Losses	0	0
Total Fair Value	276	103
Total Unrealized Losses	$ 38	9
Equity securities | Nonredeemable preferred equities
Investments, Unrealized Loss Position [Line Items]
Less than 12 months Fair Value		4
Less than 12 months Unrealized Losses		0
12 months or more Fair Value		0
12 months or more Unrealized Losses		0
Total Fair Value		4
Total Unrealized Losses		$ 0

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Investments - Schedule of Contractual Maturities of Investments (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Amortized cost
Due in one year or less	$ 674
Due after one year through five years	2,668
Due after five years through ten years	3,853
Due after ten years	2,940
Total	10,135	$ 9,799
Fair value
Due in one year or less	686
Due after one year through five years	2,803
Due after five years through ten years	4,009
Due after ten years	3,042
Total	$ 10,540	$ 10,085
% of fair value
Due in one year or less	6.50%
Due after one year through five years	26.60%
Due after five years through ten years	38.00%
Due after ten years	28.90%
Total	100.00%

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Investments - Realized Investment Gains and Losses and Change in Unrealized Investment Gains and Losses and Other Items (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Investment income:
Interest	$ 112	$ 111	$ 334	$ 330
Dividends	43	39	124	117
Other	1	1	3	2
Total	156	151	461	449
Less investment expenses	3	3	8	7
Total	153	148	453	442
Realized investment gains and losses:
Realized investment gains and losses, net	7	56	156	161
Change in unrealized investment gains and losses:
Change in unrealized investment gains and losses	123	41	352	417
change in Income tax provision	(66)	(21)	(189)	(224)
Fixed maturities
Realized investment gains and losses:
Gross realized gains	3	10	16	17
Gross realized losses	0	0	0	(1)
Other-than-temporary impairments	0	0	(6)	(2)
Change in unrealized investment gains and losses:
Change in unrealized investment gains and losses	9	(20)	119	274
Equity securities
Realized investment gains and losses:
Gross realized gains	1	47	160	147
Gross realized losses	0	0	(14)	(1)
Other-than-temporary impairments	0	0	(3)	0
Other	3	(1)	3	1
Change in unrealized investment gains and losses:
Change in unrealized investment gains and losses	$ 180	$ 82	$ 422	$ 367

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Investments - Additional Information (Detail)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017 USD ($) security	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) security	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($) security
Gain (Loss) on Investments [Line Items]
Largest Single Common Stock Holding	$ 216,000,000		$ 216,000,000
Largest equity holdings to total equity portfolio	3.70%		3.70%
Largest equity holdings to total portfolio	1.30%		1.30%
Unrealized losses 12 months or more (equity investment less than $500,000)	$ (12,000,000)		$ (12,000,000)		$ (11,000,000)
Fixed maturity investments, Percentage of amortized costs			70.00%		70.00%
Fixed maturities
Gain (Loss) on Investments [Line Items]
Number Of Securities Other Than Temporary Impairment Losses1 | security	0		1
Provision for Other Credit Losses	$ 0	$ 0	$ 0	$ 0
Number Of Securities Continuous Unrealized Loss Position More Than Twelve Months | security	94		94		32
Unrealized losses 12 months or more (equity investment less than $500,000)	$ (12,000,000)		$ (12,000,000)		$ (11,000,000)
Number Of Securities Continuous Unrealized Loss Position More Than Twelve Months and Below 70 Percent of Amortized Cost	0		0		0
Equity securities
Gain (Loss) on Investments [Line Items]
Number Of Securities Other Than Temporary Impairment Losses1 | security	0		5
Number Of Securities Continuous Unrealized Loss Position More Than Twelve Months	0		0		0
Unrealized losses 12 months or more (equity investment less than $500,000)	$ 0		$ 0		$ 0
Number Of Securities Continuous Unrealized Loss Position More Than Twelve Months and Below 70 Percent of Amortized Cost	0		0		0
Largest unrealized investment gains in common stock portfolio [Member]
Gain (Loss) on Investments [Line Items]
Unrealized investment gains due to a net gain position	$ 864,000,000		$ 864,000,000
Common equities
Gain (Loss) on Investments [Line Items]
Number of securities	7		7

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Fair Value Measurements - Fair Value Hierarchy for Assets Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	$ 10,540	$ 10,085
Equity securities, at fair value	6,025	5,334
Separate accounts	798	766
Top Hat savings plan mutual funds and common equity (included in Other assets)	30	24
Fair value of asset	17,378	16,193
Debt Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	10,540	10,085
Debt Securities | Corporate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	5,783	5,781
Debt Securities | States, municipalities and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	4,234	3,828
Debt Securities | Commercial mortgage-backed
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	288	287
Debt Securities | Government-sponsored enterprises
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	204	164
Debt Securities | United States government
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	16	10
Debt Securities | Foreign government
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	10	10
Debt Securities | Convertibles and bonds with warrants attached
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	5	5
Equity securities | Common equities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities, at fair value	5,808	5,123
Equity securities | Nonredeemable preferred equities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities, at fair value	217	211
Taxable Fixed Maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Separate accounts	783	750
Quoted prices in active markets for identical assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Top Hat savings plan mutual funds and common equity (included in Other assets)	30	24
Fair value of asset	5,854	5,157
Quoted prices in active markets for identical assets (Level 1) | Debt Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	16	10
Quoted prices in active markets for identical assets (Level 1) | Debt Securities | Corporate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	0	0
Quoted prices in active markets for identical assets (Level 1) | Debt Securities | States, municipalities and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	0	0
Quoted prices in active markets for identical assets (Level 1) | Debt Securities | Commercial mortgage-backed
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	0	0
Quoted prices in active markets for identical assets (Level 1) | Debt Securities | Government-sponsored enterprises
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	0	0
Quoted prices in active markets for identical assets (Level 1) | Debt Securities | United States government
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	16	10
Quoted prices in active markets for identical assets (Level 1) | Debt Securities | Foreign government
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	0	0
Quoted prices in active markets for identical assets (Level 1) | Debt Securities | Convertibles and bonds with warrants attached
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	0	0
Quoted prices in active markets for identical assets (Level 1) | Equity securities | Common equities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities, at fair value	5,808	5,123
Quoted prices in active markets for identical assets (Level 1) | Equity securities | Nonredeemable preferred equities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities, at fair value	0	0
Quoted prices in active markets for identical assets (Level 1) | Taxable Fixed Maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Separate accounts	0	0
Significant other observable inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Top Hat savings plan mutual funds and common equity (included in Other assets)	0	0
Fair value of asset	11,518	10,958
Significant other observable inputs (Level 2) | Debt Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	10,518	9,997
Significant other observable inputs (Level 2) | Debt Securities | Corporate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	5,782	5,703
Significant other observable inputs (Level 2) | Debt Securities | States, municipalities and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	4,229	3,828
Significant other observable inputs (Level 2) | Debt Securities | Commercial mortgage-backed
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	288	287
Significant other observable inputs (Level 2) | Debt Securities | Government-sponsored enterprises
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	204	164
Significant other observable inputs (Level 2) | Debt Securities | United States government
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	0	0
Significant other observable inputs (Level 2) | Debt Securities | Foreign government
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	10	10
Significant other observable inputs (Level 2) | Debt Securities | Convertibles and bonds with warrants attached
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	5	5
Significant other observable inputs (Level 2) | Equity securities | Common equities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities, at fair value	0	0
Significant other observable inputs (Level 2) | Equity securities | Nonredeemable preferred equities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities, at fair value	217	211
Significant other observable inputs (Level 2) | Taxable Fixed Maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Separate accounts	783	750
Significant unobservable inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Top Hat savings plan mutual funds and common equity (included in Other assets)	0	0
Fair value of asset	6	78
Significant unobservable inputs (Level 3) | Debt Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	6	78
Significant unobservable inputs (Level 3) | Debt Securities | Corporate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	1	78
Significant unobservable inputs (Level 3) | Debt Securities | States, municipalities and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	5	0
Significant unobservable inputs (Level 3) | Debt Securities | Commercial mortgage-backed
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	0	0
Significant unobservable inputs (Level 3) | Debt Securities | Government-sponsored enterprises
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	0	0
Significant unobservable inputs (Level 3) | Debt Securities | United States government
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	0	0
Significant unobservable inputs (Level 3) | Debt Securities | Foreign government
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	0	0
Significant unobservable inputs (Level 3) | Debt Securities | Convertibles and bonds with warrants attached
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed maturities, at fair value	0	0
Significant unobservable inputs (Level 3) | Equity securities | Common equities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities, at fair value	0	0
Significant unobservable inputs (Level 3) | Equity securities | Nonredeemable preferred equities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities, at fair value	0	0
Significant unobservable inputs (Level 3) | Taxable Fixed Maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Separate accounts	$ 0	$ 0

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Fair Value Measurements - Change in Level 3 Assets (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 6	$ 53	$ 78	$ 55
Total gains or losses (realized/unrealized):
Included in net income	0	0	0	0
Included in other comprehensive income	0	1	0	0
Purchases	0	0	5	22
Sales	0	(1)	0	(3)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	(11)	(77)	(32)
Ending balance	6	42	6	42
Corporate Fixed Maturities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	1	52	78	51
Total gains or losses (realized/unrealized):
Included in net income	0	0	0	0
Included in other comprehensive income	0	1	0	1
Purchases	0	0	0	22
Sales	0	(1)	0	(1)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	(10)	(77)	(31)
Ending balance	1	42	1	42
Taxable Fixed Maturities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	0	1	0	1
Total gains or losses (realized/unrealized):
Included in net income	0	0	0	0
Included in other comprehensive income	0	0	0	0
Purchases	0	0	0	0
Sales	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	(1)	0	(1)
Ending balance	0	0	0	0
States, Municipalities And Political Subdivisions Fixed Maturities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	5	0	0	0
Total gains or losses (realized/unrealized):
Included in net income	0	0	0	0
Included in other comprehensive income	0	0	0	0
Purchases	0	0	5	0
Sales	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Ending balance	5	0	5	0
Preferred Equities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	0	0	0	3
Total gains or losses (realized/unrealized):
Included in net income	0	0	0	0
Included in other comprehensive income	0	0	0	(1)
Purchases	0	0	0	0
Sales	0	0	0	(2)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Ending balance	$ 0	$ 0	$ 0	$ 0

XML

Fair Value Measurements - Summary of Book Value and Principal Amounts of Long-Term Debt (Detail) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Book value	$ 787	$ 787
Principal amount of debt	$ 793	$ 793
Senior Debentures 6.900% Due 2028
Debt Instrument [Line Items]
Interest rate	6.90%	6.90%
Debt issuance year	1998	1998
Book value	$ 26	$ 26
Principal amount of debt	$ 28	$ 28
Senior Debentures 6.920% Due 2028
Debt Instrument [Line Items]
Interest rate	6.92%	6.92%
Debt issuance year	2005	2005
Book value	$ 391	$ 391
Principal amount of debt	$ 391	$ 391
Senior Notes 6.152% Due 2034
Debt Instrument [Line Items]
Interest rate	6.125%	6.125%
Debt issuance year	2004	2004
Book value	$ 370	$ 370
Principal amount of debt	$ 374	$ 374

XML

Fair Value Measurements - Fair Values of Note Payable and Long-Term Debt (Detail) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of note payable	$ 17	$ 20
Total	1,013	976
Finance receivable	$ 56	$ 51
Senior Debentures 6.900 % Due 2028
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate	6.90%	6.90%
Debt instrument, year of maturity	2028	2028
Fair value of senior debt	$ 34	$ 33
Senior Debentures 6.920 % Due 2028
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate	6.92%	6.92%
Debt instrument, year of maturity	2028	2028
Fair value of senior debt	$ 503	$ 488
Senior Notes 6.125 % Due 2034
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate	6.125%	6.125%
Debt instrument, year of maturity	2034	2034
Fair value of senior debt	$ 459	$ 435
Quoted prices in active markets for identical assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of note payable	0	0
Total	0	0
Quoted prices in active markets for identical assets (Level 1) | Senior Debentures 6.900 % Due 2028
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of senior debt	0	0
Quoted prices in active markets for identical assets (Level 1) | Senior Debentures 6.920 % Due 2028
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of senior debt	0	0
Quoted prices in active markets for identical assets (Level 1) | Senior Notes 6.125 % Due 2034
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of senior debt	0	0
Significant other observable inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of note payable	17	20
Total	1,013	976
Significant other observable inputs (Level 2) | Senior Debentures 6.900 % Due 2028
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of senior debt	34	33
Significant other observable inputs (Level 2) | Senior Debentures 6.920 % Due 2028
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of senior debt	503	488
Significant other observable inputs (Level 2) | Senior Notes 6.125 % Due 2034
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of senior debt	459	435
Significant unobservable inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of note payable	0	0
Total	0	0
Significant unobservable inputs (Level 3) | Senior Debentures 6.900 % Due 2028
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of senior debt	0	0
Significant unobservable inputs (Level 3) | Senior Debentures 6.920 % Due 2028
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of senior debt	0	0
Significant unobservable inputs (Level 3) | Senior Notes 6.125 % Due 2034
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of senior debt	0	0
Deferred Annuities And Structured Settlements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability for Future Policy Benefits, Individual and Group Annuities and Supplementary Contracts	844	861
Policy Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Finance receivable	$ 31	$ 31

XML

Fair Value Measurements - Fair Value of Life Policy Loans (Detail) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Finance receivable	$ 56	$ 51
Fair value of life policy loans	41	40
Quoted prices in active markets for identical assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of life policy loans	0	0
Significant other observable inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of life policy loans	0	0
Significant unobservable inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of life policy loans	41	40
Policy Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Finance receivable	$ 31	$ 31

XML

Fair Value Measurements - Fair Values of Deferred Annuities, Structured Settlements and Other Items (Detail) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value of life insurance liabilities	$ 1,055	$ 1,045
Deferred annuities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value of life insurance liabilities	846	839
Structured Settlements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value of life insurance liabilities	209	206
Quoted prices in active markets for identical assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value of life insurance liabilities	0	0
Quoted prices in active markets for identical assets (Level 1) | Deferred annuities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value of life insurance liabilities	0	0
Quoted prices in active markets for identical assets (Level 1) | Structured Settlements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value of life insurance liabilities	0	0
Significant other observable inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value of life insurance liabilities	209	206
Significant other observable inputs (Level 2) | Deferred annuities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value of life insurance liabilities	0	0
Significant other observable inputs (Level 2) | Structured Settlements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value of life insurance liabilities	209	206
Significant unobservable inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value of life insurance liabilities	846	839
Significant unobservable inputs (Level 3) | Deferred annuities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value of life insurance liabilities	846	839
Significant unobservable inputs (Level 3) | Structured Settlements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value of life insurance liabilities	$ 0	$ 0

XML

Fair Value Measurements - Additional Information (Detail) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Finance receivable	$ 56	$ 51
Loss and loss expense reserves	5,350	5,085
Life Policy Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Finance receivable	31	31
Deferred Annuities And Structured Settlements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability for Future Policy Benefits, Individual and Group Annuities and Supplementary Contracts	844	861
Loss and loss expense reserves	$ 163	$ 170
Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percentage Of Level 3 Assets To Total Financial Instruments Measured At Fair Value	1.00%

XML

Property Casualty Loss and Loss Expenses - Consolidated Property Casualty Loss and Loss Expense Reserves (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Summary of Consolidated Property Casualty Loss and Loss Expense Reserves [Roll Forward]
Gross loss and loss expense reserves, beginning of period	$ 5,213	$ 4,918	$ 5,035	$ 4,660
Less reinsurance recoverable	283	310	298	281
Net loss and loss expense reserves, beginning of period	4,930	4,608	4,737	4,379
Current accident year	835	730	2,493	2,261
Prior accident years	(20)	(40)	(96)	(151)
Total incurred	815	690	2,397	2,110
Current accident year	411	374	969	848
Prior accident years	314	288	1,145	1,005
Total paid	725	662	2,114	1,853
Net loss and loss expense reserves, end of period	5,020	4,636	5,020	4,636
Plus reinsurance recoverable	280	301	280	301
Gross loss and loss expense reserves, end of period	$ 5,300	$ 4,937	$ 5,300	$ 4,937

XML

Property Casualty Loss and Loss Expenses - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015
Supplemental Information for Property, Casualty Insurance Underwriters [Line Items]
Reserve for loss and loss expenses	$ 5,300	$ 4,937	$ 5,300	$ 4,937	$ 5,213	$ 5,035	$ 4,918	$ 4,660
Prior accident years	(20)	(40)	(96)	(151)
Life and Health Loss Reserves
Supplemental Information for Property, Casualty Insurance Underwriters [Line Items]
Reserve for loss and loss expenses	50	54	50	54
Commercial Lines
Supplemental Information for Property, Casualty Insurance Underwriters [Line Items]
Prior accident years	(18)	(31)	(55)	(118)
Commercial Lines | Workers' Compensation
Supplemental Information for Property, Casualty Insurance Underwriters [Line Items]
Prior accident years	(14)	(16)	(44)	(52)
Commercial Lines | Commercial Casualty Segment [Member]
Supplemental Information for Property, Casualty Insurance Underwriters [Line Items]
Prior accident years		(7)	8	(30)
Commercial Lines | Other Commercial Lines [Member]
Supplemental Information for Property, Casualty Insurance Underwriters [Line Items]
Prior accident years	(5)	(11)	(25)	(37)
Commercial Lines | Commercial Auto
Supplemental Information for Property, Casualty Insurance Underwriters [Line Items]
Prior accident years	8	4	27	26
Commercial Lines | Commercial Property Segment [Member]
Supplemental Information for Property, Casualty Insurance Underwriters [Line Items]
Prior accident years	(7)		(21)	(25)
Personal Lines
Supplemental Information for Property, Casualty Insurance Underwriters [Line Items]
Prior accident years		4	(13)	(4)
Personal Lines | Personal Auto [Member]
Supplemental Information for Property, Casualty Insurance Underwriters [Line Items]
Prior accident years		9		15
Excess and Surplus Lines Insurance
Supplemental Information for Property, Casualty Insurance Underwriters [Line Items]
Prior accident years	(3)	(12)	(25)	(27)
Reinsurance assumed and other non segment [Member]
Supplemental Information for Property, Casualty Insurance Underwriters [Line Items]
Prior accident years	1	$ (1)	(3)	(2)
Consolidated Property and Casualty Insurance Entity | Catastrophe Development
Supplemental Information for Property, Casualty Insurance Underwriters [Line Items]
Prior accident years	$ (6)		$ (20)	$ (5)

XML

Reserves in Addition to Account Balance, Based on Expected No-Lapse Guarantee Benefits and Expected Policy Assessments (Detail) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Liability for Future Policy Benefit, by Product Segment [Line Items]
Life policy and investment contract reserves	$ 2,716	$ 2,671
Life policy reserves:
Liability for Future Policy Benefit, by Product Segment [Line Items]
Life policy and investment contract reserves	1,109	1,056
Life policy reserves: | Ordinary/traditional life
Liability for Future Policy Benefit, by Product Segment [Line Items]
Life policy and investment contract reserves	1,063	1,011
Life policy reserves: | Other
Liability for Future Policy Benefit, by Product Segment [Line Items]
Life policy and investment contract reserves	46	45
Investment contract reserves:
Liability for Future Policy Benefit, by Product Segment [Line Items]
Life policy and investment contract reserves	1,607	1,615
Investment contract reserves: | Deferred annuities
Liability for Future Policy Benefit, by Product Segment [Line Items]
Life policy and investment contract reserves	844	861
Investment contract reserves: | Universal life
Liability for Future Policy Benefit, by Product Segment [Line Items]
Life policy and investment contract reserves	594	578
Investment contract reserves: | Structured Settlement Annuity [Member]
Liability for Future Policy Benefit, by Product Segment [Line Items]
Life policy and investment contract reserves	163	170
Investment contract reserves: | Other
Liability for Future Policy Benefit, by Product Segment [Line Items]
Life policy and investment contract reserves	$ 6	$ 6

XML

Deferred Acquisition Costs - Deferred Policy Acquisition Costs and Asset Reconciliation (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Deferred policy acquisition costs asset, beginning of period	$ 678	$ 624	$ 637	$ 616
Capitalized deferred policy acquisition costs	236	227	724	679
Deferred Policy Acquisition Costs, Amortization Expense	(237)	(222)	(680)	(648)
Deferred Policy Acquisition Cost, Amortization Expense, Other	(1)	(2)	(5)	(20)
Deferred policy acquisition costs asset, end of period	676	627	676	627
Life Insurance Product Line [Member]
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Deferred policy acquisition costs asset, beginning of period	230	212	229	228
Capitalized deferred policy acquisition costs	13	11	38	35
Deferred Policy Acquisition Costs, Amortization Expense	(17)	(15)	(37)	(37)
Deferred Policy Acquisition Cost, Amortization Expense, Other	(1)	(2)	(5)	(20)
Deferred policy acquisition costs asset, end of period	225	206	225	206
Consolidated Property and Casualty Insurance Entity
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Deferred policy acquisition costs asset, beginning of period	448	412	408	388
Capitalized deferred policy acquisition costs	223	216	686	644
Deferred Policy Acquisition Costs, Amortization Expense	(220)	(207)	(643)	(611)
Deferred policy acquisition costs asset, end of period	$ 451	$ 421	$ 451	$ 421

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Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated other comprehensive income, net of tax, beginning of period	$ 2,047		$ 2,047			$ 1,693
Accumulated other comprehensive income, net of tax, end of period	2,047		2,047
Accumulated Net Unrealized Investment Gain (Loss)
Accumulated Other Comprehensive Income Loss Before Tax [Abstract]
Accumulated other comprehensive income, before tax, beginning of period	2,977	$ 2,673	2,625	$ 2,094
Other comprehensive income before reclassification, before tax	193	119	694	801
Reclassification adjustment, before tax	(4)	(57)	153	(160)
Effect on other comprehensive income, before tax	189	62	541	641
Accumulated other comprehensive income, before tax, end of period	3,166	2,735	3,166	2,735
Accumulated Other Comprehensive Income (Loss), Tax [Abstract]
Accumulated other comprehensive income, tax, beginning of period	1,031	925	908	722
Other comprehensive income before reclassification, tax	67	41	243	280
Reclassification adjustment, tax	(1)	(20)	(54)	(56)
Effect on other comprehensive income, tax	66	21	189	224
Accumulated other comprehensive income, tax, end of period	1,097	946	1,097	946
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated other comprehensive income, net of tax, beginning of period	2,069	1,789	2,069	1,789	$ 1,946	1,717	$ 1,748	$ 1,372
Other comprehensive income before reclassification, net of tax	126	78	451	521
Reclassification adjustment, net of tax	(3)	(37)	(99)	(104)
Effect on other comprehensive income, net of tax	123	41	352	417
Accumulated other comprehensive income, net of tax, end of period	2,069	1,789	2,069	1,789
Accumulated Defined Benefit Plans Adjustment
Accumulated Other Comprehensive Income Loss Before Tax [Abstract]
Accumulated other comprehensive income, before tax, beginning of period	(25)	(40)	(26)	(42)
Other comprehensive income before reclassification, before tax	0	0	0	0
Reclassification adjustment, before tax	1	0	2	2
Effect on other comprehensive income, before tax	1	0	2	2
Accumulated other comprehensive income, before tax, end of period	(24)	(40)	(24)	(40)
Accumulated Other Comprehensive Income (Loss), Tax [Abstract]
Accumulated other comprehensive income, tax, beginning of period	(8)	(13)	(8)	(14)
Other comprehensive income before reclassification, tax	0	0	0	0
Reclassification adjustment, tax	1	0	1	1
Effect on other comprehensive income, tax	1	0	1	1
Accumulated other comprehensive income, tax, end of period	(7)	(13)	(7)	(13)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated other comprehensive income, net of tax, beginning of period	(17)	(27)	(17)	(27)	(17)	(18)	(27)	(28)
Other comprehensive income before reclassification, net of tax	0	0	0	0
Reclassification adjustment, net of tax	0	0	1	1
Effect on other comprehensive income, net of tax	0	0	1	1
Accumulated other comprehensive income, net of tax, end of period	(17)	(27)	(17)	(27)
Accumulated Net Unrealized Gain (Loss) on Deferred Costs, Reserves And Other
Accumulated Other Comprehensive Income Loss Before Tax [Abstract]
Accumulated other comprehensive income, before tax, beginning of period	(6)	(10)	(9)	1
Other comprehensive income before reclassification, before tax	1	(4)	4	(13)
Reclassification adjustment, before tax	(3)	1	(3)	(1)
Effect on other comprehensive income, before tax	(2)	(3)	1	(14)
Accumulated other comprehensive income, before tax, end of period	(8)	(13)	(8)	(13)
Accumulated Other Comprehensive Income (Loss), Tax [Abstract]
Accumulated other comprehensive income, tax, beginning of period	(2)	(3)	(3)	1
Other comprehensive income before reclassification, tax	0	(1)	1	(4)
Reclassification adjustment, tax	(1)	1	(1)	0
Effect on other comprehensive income, tax	(1)	0	0	(4)
Accumulated other comprehensive income, tax, end of period	(3)	(3)	(3)	(3)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated other comprehensive income, net of tax, beginning of period	(5)	(10)	(5)	(10)	(4)	(6)	(7)	0
Other comprehensive income before reclassification, net of tax	1	(3)	3	(9)
Reclassification adjustment, net of tax	(2)	0	(2)	(1)
Effect on other comprehensive income, net of tax	(1)	(3)	1	(10)
Accumulated other comprehensive income, net of tax, end of period	(5)	(10)	(5)	(10)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income Loss Before Tax [Abstract]
Accumulated other comprehensive income, before tax, beginning of period	2,946	2,623	2,590	2,053
Change in unrealized gains, net, on investments available for sale, before tax	189	62	541	641
Change in pension obligations, before tax	1	0	2	2
Change in life deferred acquisition costs, life policy reserves and other, before tax	(2)	(3)	1	(14)
Effect on other comprehensive income, before tax	188	59	544	629
Accumulated other comprehensive income, before tax, end of period	3,134	2,682	3,134	2,682
Accumulated Other Comprehensive Income (Loss), Tax [Abstract]
Accumulated other comprehensive income, tax, beginning of period	1,021	909	897	709
Change in unrealized gains, net, on investments available for sale, tax	66	21	189	224
Change in pension obligations, tax	1	0	1	1
Change in life deferred acquisition costs, life policy reserves and other, tax	(1)	0	0	(4)
Effect on other comprehensive income, tax	66	21	190	221
Accumulated other comprehensive income, tax, end of period	1,087	930	1,087	930
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated other comprehensive income, net of tax, beginning of period	2,047	1,752	2,047	1,752	$ 1,925	$ 1,693	$ 1,714	$ 1,344
Change in unrealized gains, net, on investments available for sale, net of tax	123	41	352	417
Change in pension obligations, net of tax	0	0	1	1
Change in life deferred acquisition costs, life policy reserves and other, net of tax	(1)	(3)	1	(10)
Effect on other comprehensive income, net of tax	122	38	354	408
Accumulated other comprehensive income, net of tax, end of period	$ 2,047	$ 1,752	$ 2,047	$ 1,752

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Reinsurance - Written Consolidated Property Casualty Insurance Premium on Assumed and Ceded Business (Details) - Consolidated Property and Casualty Insurance Entity - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Property Casualty Insurance Premiums Written On Assumed And Ceded Business [Line Items]
Direct written premiums	$ 1,221	$ 1,189	$ 3,712	$ 3,561
Assumed written premiums	26	23	101	86
Ceded written premiums	(39)	(37)	(103)	(131)
Net written premiums	$ 1,208	$ 1,175	$ 3,710	$ 3,516

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Reinsurance - Earned Consolidated Property Casualty Insurance Premiums on Assumed and Ceded Business (Detail) - Consolidated Property and Casualty Insurance Entity - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Direct earned premiums	$ 1,195	$ 1,153	$ 3,547	$ 3,409
Assumed earned premiums	39	22	99	53
Ceded earned premiums	(43)	(42)	(123)	(119)
Earned premiums	$ 1,191	$ 1,133	$ 3,523	$ 3,343

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Reinsurance - Incurred Consolidated Property Casualty Insurance Loss and Loss Expenses on Assumed and Ceded Business (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Incurred loss and loss expenses	$ 874	$ 753	$ 2,581	$ 2,298
Consolidated Property and Casualty Insurance Entity
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Direct incurred loss and loss expenses	760	691	2,318	2,131
Assumed incurred loss and loss expenses	62	9	97	30
Ceded incurred loss and loss expenses	(7)	(10)	(18)	(51)
Incurred loss and loss expenses	$ 815	$ 690	$ 2,397	$ 2,110

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Reinsurance - Earned Life Insurance Premiums on Ceded Business (Detail) - Life Insurance Segment - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Direct earned premiums	$ 72	$ 74	$ 223	$ 220
Ceded earned premiums	(16)	(16)	(50)	(45)
Earned premiums	$ 56	$ 58	$ 173	$ 175

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Reinsurance - Life Insurance Contract Holders' Benefits Incurred on Ceded Business (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Insurance losses and contract holders' benefits	$ 874	$ 753	$ 2,581	$ 2,298
Life Insurance Segment
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Direct contract holders' benefits incurred	73	72	236	228
Ceded contract holders' benefits incurred	(14)	(9)	(52)	(40)
Insurance losses and contract holders' benefits	$ 59	$ 63	$ 184	$ 188

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Income Taxes - Differences Between 35 Percent Statutory Income Tax Rate and Effective Income Tax Rate (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Tax Disclosure [Abstract]
Tax at statutory rate	$ 46	$ 88	$ 187	$ 239
Increase (decrease) resulting from:
Tax-exempt income from municipal bonds	(9)	(8)	(27)	(25)
Dividend received exclusion	(8)	(8)	(25)	(24)
Other	(2)	1	(5)	3
Total provision for income taxes	$ 27	$ 73	$ 130	$ 193
Tax at statutory rate	35.00%	35.00%	35.00%	35.00%
Increase (decrease) resulting from:
Tax-exempt income from municipal bonds	(7.00%)	(3.20%)	(5.10%)	(3.70%)
Dividend received exclusion	(6.20%)	(3.20%)	(4.70%)	(3.50%)
Other	(0.90%)	0.30%	(0.80%)	0.40%
Provision for income taxes	20.90%	28.90%	24.40%	28.20%

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Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Tax Disclosure [Abstract]
Tax at statutory rate, percentage	35.00%	35.00%	35.00%	35.00%
Excess tax benefit, ASU 2016-09			$ 7
Effect of excess tax benefit, ASU 2016-09, percent			1.30%

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Net Income Per Common Share - Calculations for Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Numerator:
Net income-basic and diluted	$ 102	$ 180	$ 403	$ 491
Denominator:
Basic weighted-average common shares outstanding (in shares)	164.0	164.6	164.3	164.5
Diluted weighted-average shares	165.9	166.8	166.1	166.5
Earnings per share:
Basic (in USD per share)	$ 0.62	$ 1.09	$ 2.45	$ 2.98
Diluted (in USD per share)	$ 0.61	$ 1.08	$ 2.42	$ 2.95
Number of anti-dilutive stock-based awards (in shares)	0.6	0.0	0.7	0.3
Stock Options
Denominator:
Effect of stock-based awards (in shares)	1.1	1.2	1.1	1.1
Nonvested shares
Denominator:
Effect of stock-based awards (in shares)	0.8	1.0	0.7	0.9

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Employee Retirement Benefits - Components of Net Periodic Costs for Qualified and Supplemental Pension Plans (Detail) - Qualified Pension Plans [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 3	$ 3	$ 8	$ 8
Interest cost	4	4	11	11
Expected return on plan assets	(6)	(5)	(16)	(14)
Amortization of actuarial loss and prior service cost	1	0	2	2
Net periodic benefit cost	$ 2	$ 2	$ 5	$ 7

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Employee Retirement Benefits - Defined Contribution Plan (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Defined Benefit Plan Disclosure [Line Items]
Matching contributions to 401(k) and Top Hat plans	$ 4	$ 3	$ 13	$ 11
Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension contributions			$ 5

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Segment Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Segment Reporting Information [Line Items]
Earned premiums	$ 1,247	$ 1,191	$ 3,696	$ 3,518
Fee revenues	3	5	12	11
Investment income, net of expenses	153	148	453	442
Realized investment gains and losses, net	7	56	156	161
Other	2	2	4	5
Total revenues	1,412	1,402	4,321	4,137
Income (loss) before income taxes	129	253	533	684
Identifiable assets	21,592		21,592		$ 20,386
Consolidated Property and Casualty Insurance Entity
Segment Reporting Information [Line Items]
Identifiable assets	2,997		2,997		2,967
Life Insurance Segment
Segment Reporting Information [Line Items]
Identifiable assets	1,424		1,424		1,366
Investments Segment
Segment Reporting Information [Line Items]
Identifiable assets	16,693		16,693		15,569
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Other	2	2	4	5
Total revenues	34	15	84	38
Income (loss) before income taxes	(46)	(8)	(69)	(38)
Identifiable assets	478		478		$ 484
Corporate, Non-Segment [Member] | Reinsurance assumed and other non segment [Member]
Segment Reporting Information [Line Items]
Earned premiums	32	13	80	33
Operating Segments | Commercial Lines
Segment Reporting Information [Line Items]
Earned premiums	792	779	2,369	2,310
Fee revenues	1	1	3	3
Total revenues	793	780	2,372	2,313
Income (loss) before income taxes	39	72	61	148
Operating Segments | Personal Lines
Segment Reporting Information [Line Items]
Earned premiums	314	293	921	864
Fee revenues	1	1	4	3
Total revenues	315	294	925	867
Income (loss) before income taxes	(9)	(8)	(48)	0
Operating Segments | Excess and Surplus Lines Insurance
Segment Reporting Information [Line Items]
Earned premiums	53	48	153	136
Fee revenues	0	1	1	1
Total revenues	53	49	154	137
Income (loss) before income taxes	13	20	50	42
Operating Segments | Life Insurance Segment
Segment Reporting Information [Line Items]
Earned premiums	56	58	173	175
Fee revenues	1	2	4	4
Total revenues	57	60	177	179
Income (loss) before income taxes	(4)	(4)	0	(4)
Operating Segments | Investments Segment
Segment Reporting Information [Line Items]
Investment income, net of expenses	153	148	453	442
Realized investment gains and losses, net	7	56	156	161
Total revenues	160	204	609	603
Income (loss) before income taxes	136	181	539	536
Commercial Casualty | Operating Segments | Commercial Lines
Segment Reporting Information [Line Items]
Earned premiums	268	265	804	785
Commercial Property | Operating Segments | Commercial Lines
Segment Reporting Information [Line Items]
Earned premiums	225	217	674	646
Commercial Auto | Operating Segments | Commercial Lines
Segment Reporting Information [Line Items]
Earned premiums	159	151	472	442
Workers' Compensation | Operating Segments | Commercial Lines
Segment Reporting Information [Line Items]
Earned premiums	84	90	254	268
Other Commercial Lines | Operating Segments | Commercial Lines
Segment Reporting Information [Line Items]
Earned premiums	56	56	165	169
Personal Auto | Operating Segments | Personal Lines
Segment Reporting Information [Line Items]
Earned premiums	148	137	433	403
Home Owner Segment | Operating Segments | Personal Lines
Segment Reporting Information [Line Items]
Earned premiums	131	122	384	362
Other Personal Lines | Operating Segments | Personal Lines
Segment Reporting Information [Line Items]
Earned premiums	$ 35	$ 34	$ 104	$ 99

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Segment Information - Narrative (Details)	9 Months Ended
	Sep. 30, 2017 segment industry
Segment Reporting [Abstract]
Number of Industries Operating In | industry	2
Number of Reportable Segments | segment	5