10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

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

For the quarterly period ended September 30, 2022

or

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

For the transition period from                     to                     

Commission File Number: 001-09518

THE PROGRESSIVE CORPORATION

(Exact name of registrant as specified in its charter)

Ohio			34-0963169
(State or other jurisdiction of incorporation or organization)			(I.R.S. Employer Identification No.)
6300 Wilson Mills Road,	Mayfield Village,	Ohio	44143
(Address of principal executive offices)			(Zip Code)

(440) 461-5000

(Registrant’s telephone number, including area code)

Not Applicable

(Former name, former address and former fiscal year, if changed since last report) 

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

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Shares, $1.00 Par Value	PGR	New York Stock Exchange

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

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

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

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

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

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

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

Common Shares, $1.00 par value: 585,069,712 outstanding at September 30, 2022

PART I—FINANCIAL INFORMATION

Item 1. Financial Statements.

The Progressive Corporation and Subsidiaries

Consolidated Statements of Comprehensive Income

(unaudited)

	Three Months				Nine Months
Periods Ended September 30,	2022		2021		2022		2021
(millions — except per share amounts)
Revenues
Net premiums earned	$	12,398.9	$	11,364.8	$	36,349.7	$	32,767.3
Investment income	333.6		208.9		868.2		639.8
Net realized gains (losses) on securities:
Net realized gains (losses) on security sales	(62.1)		53.9		430.0		607.8
Net holding period gains (losses) on securities	(152.1)		(15.9)		(2,262.9)		479.8
Net impairment losses recognized in earnings	(2.2)		(1.2)		(6.5)		(3.7)
Total net realized gains (losses) on securities	(216.4)		36.8		(1,839.4)		1,083.9
Fees and other revenues	181.4		174.9		531.9		516.8
Service revenues	82.7		73.8		230.5		202.1
Total revenues	12,780.2		11,859.2		36,140.9		35,209.9
Expenses
Losses and loss adjustment expenses	10,018.7		9,250.7		28,298.2		24,767.6
Policy acquisition costs	970.9		951.5		2,867.9		2,754.7
Other underwriting expenses	1,496.4		1,384.4		4,433.9		4,306.0
Investment expenses	5.8		6.6		17.4		18.5
Service expenses	82.8		72.8		221.5		190.0
Interest expense	63.1		54.2		180.4		167.0
Goodwill impairment1	0		0		224.8		0
Total expenses	12,637.7		11,720.2		36,244.1		32,203.8
Net Income (Loss)
Income (loss) before income taxes	142.5		139.0		(103.2)		3,006.1
Provision for income taxes	18.4		20.5		1.7		617.5
Net income (loss)	124.1		118.5		(104.9)		2,388.6
Other Comprehensive Income (Loss)
Changes in:
Total net unrealized gains (losses) on fixed-maturity securities	(920.3)		(129.8)		(3,170.0)		(578.3)
Net unrealized losses on forecasted transactions	0.1		0.1		0.3		0.6
Foreign currency translation adjustment	(0.7)		(0.2)		(0.9)		(0.7)
Other comprehensive income (loss)	(920.9)		(129.9)		(3,170.6)		(578.4)
Comprehensive income (loss)	$	(796.8)	$	(11.4)	$	(3,275.5)	$	1,810.2
Computation of Earnings Per Common Share
Net income (loss)	$	124.1	$	118.5	$	(104.9)	$	2,388.6
Less: Preferred share dividends	6.7		6.7		20.1		20.1
Net income (loss) available to common shareholders	$	117.4	$	111.8	$	(125.0)	$	2,368.5
Average common shares outstanding - Basic	584.5		584.7		584.4		584.7
Net effect of dilutive stock-based compensation	2.6		2.4		2.7		2.6
Total average equivalent common shares - Diluted	587.1		587.1		587.1		587.3
Basic: Earnings per common share	$	0.20	$	0.19	$	(0.21)	$	4.05
Diluted: Earnings per common share	$	0.20	$	0.19	$	(0.21)	$	4.03

1 See Note 12 – Goodwill and Intangible Assets for further discussion.

See notes to consolidated financial statements.

1

The Progressive Corporation and Subsidiaries

Consolidated Balance Sheets

(unaudited)

	September 30,				December 31,
(millions — except per share amounts)	2022		2021		2021
Assets
Available-for-sale securities, at fair value:
Fixed maturities (amortized cost: $48,205.7, $44,556.0, and $43,794.2)	$	44,173.1	$	45,045.7	$	43,873.1
Short-term investments (amortized cost: $4,237.6, $1,088.7, and $942.6)	4,237.6		1,088.7		942.6
Total available-for-sale securities	48,410.7		46,134.4		44,815.7
Equity securities, at fair value:
Nonredeemable preferred stocks (cost: $1,417.6, $1,479.9, and $1,571.8)	1,254.4		1,572.8		1,639.9
Common equities (cost: $803.7, $1,238.4, and $1,264.1)	2,665.3		4,580.2		5,058.5
Total equity securities	3,919.7		6,153.0		6,698.4
Total investments	52,330.4		52,287.4		51,514.1
Cash and cash equivalents	350.9		270.6		187.1
Restricted cash and cash equivalents	14.4		14.9		15.0
Total cash, cash equivalents, restricted cash, and restricted cash equivalents	365.3		285.5		202.1
Accrued investment income	217.4		168.6		181.7
Premiums receivable, net of allowance for credit losses of $295.0, $257.3, and $280.4	10,867.7		10,246.7		9,399.5
Reinsurance recoverables	6,306.8		5,044.9		4,980.5
Prepaid reinsurance premiums	367.5		661.1		457.6
Deferred acquisition costs	1,585.2		1,430.7		1,355.6
Property and equipment, net of accumulated depreciation of $1,499.0, $1,422.2, and $1,407.4	1,067.1		1,161.0		1,137.3
Goodwill	227.9		452.7		452.7
Intangible assets, net of accumulated amortization of $153.1, $369.2, and $383.8	91.8		131.9		117.3
Net federal deferred income taxes	1,269.5		0		0
Other assets	827.6		747.6		1,333.9
Total assets	$	75,524.2	$	72,618.1	$	71,132.3
Liabilities and Shareholders’ Equity
Unearned premiums	$	17,796.9	$	16,671.4	$	15,615.8
Loss and loss adjustment expense reserves	30,631.8		25,926.3		26,164.1
Net federal deferred income taxes	0		110.7		152.9
Accounts payable, accrued expenses, and other liabilities	5,931.9		6,453.4		6,069.1
Debt1	6,387.4		4,898.2		4,898.8
Total liabilities	60,748.0		54,060.0		52,900.7
Serial Preferred Shares (authorized 20.0)
Serial Preferred Shares, Series B, no par value (cumulative, liquidation preference $1,000 per share) (authorized, issued, and outstanding 0.5)	493.9		493.9		493.9
Common shares, $1.00 par value (authorized 900.0; issued 797.6, including treasury shares of 212.5, 212.6, and 213.2)	585.1		585.0		584.4
Paid-in capital	1,839.6		1,735.9		1,772.9
Retained earnings	14,987.5		15,390.0		15,339.7
Accumulated other comprehensive income (loss):
Net unrealized gains (losses) on fixed-maturity securities	(3,113.8)		369.0		56.2
Net unrealized losses on forecasted transactions	(14.6)		(15.0)		(14.9)
Foreign currency translation adjustment	(1.5)		(0.7)		(0.6)
Total accumulated other comprehensive income (loss)	(3,129.9)		353.3		40.7
Total shareholders’ equity	14,776.2		18,558.1		18,231.6
Total liabilities and shareholders’ equity	$	75,524.2	$	72,618.1	$	71,132.3

1 Consists of long-term debt. See Note 4 – Debt for further discussion.

See notes to consolidated financial statements.

2

The Progressive Corporation and Subsidiaries

Consolidated Statements of Changes in Shareholders’ Equity

(unaudited)

	Three Months				Nine Months
Periods Ended September 30,	2022		2021		2022		2021
(millions — except per share amounts)
Serial Preferred Shares, No Par Value
Balance, beginning of period	$	493.9	$	493.9	$	493.9	$	493.9
Balance, end of period	493.9		493.9		493.9		493.9
Common Shares, $1.00 Par Value
Balance, beginning of period	584.9		585.2		584.4		585.2
Treasury shares purchased	(0.4)		(0.7)		(0.7)		(1.8)
Net restricted equity awards issued/vested	0.6		0.5		1.4		1.6
Balance, end of period	585.1		585.0		585.1		585.0
Paid-In Capital
Balance, beginning of period	1,815.2		1,712.3		1,772.9		1,672.9
Amortization of equity-based compensation	26.0		26.0		69.7		68.7
Treasury shares purchased	(1.3)		(2.3)		(2.2)		(5.3)
Net restricted equity awards issued/vested	(0.6)		(0.5)		(1.4)		(1.6)
Reinvested dividends on restricted stock units	0.3		0.4		0.6		1.2
Balance, end of period	1,839.6		1,735.9		1,839.6		1,735.9
Retained Earnings
Balance, beginning of period	14,967.7		15,401.0		15,339.7		13,354.9
Net income (loss)	124.1		118.5		(104.9)		2,388.6
Treasury shares purchased	(47.4)		(68.8)		(75.7)		(160.1)
Cash dividends declared on common shares ($0.10, $0.10, $0.30, and $0.30 per share)	(58.4)		(58.4)		(175.2)		(175.2)
Cash dividends declared on Serial Preferred Shares, Series B ($26.875, $26.875, $26.875, and $26.875 per share)	(13.4)		(13.4)		(13.4)		(13.4)
Reinvested dividends on restricted stock units	(0.3)		(0.4)		(0.6)		(1.2)
Other, net	15.2		11.5		17.6		(3.6)
Balance, end of period	14,987.5		15,390.0		14,987.5		15,390.0
Accumulated Other Comprehensive Income (Loss)
Balance, beginning of period	(2,209.0)		483.2		40.7		931.7
Other comprehensive income (loss)	(920.9)		(129.9)		(3,170.6)		(578.4)
Balance, end of period	(3,129.9)		353.3		(3,129.9)		353.3
Total shareholders’ equity	$	14,776.2	$	18,558.1	$	14,776.2	$	18,558.1

There are 5.0 million Voting Preference Shares authorized; no such shares have been issued.

See notes to consolidated financial statements.

3

The Progressive Corporation and Subsidiaries

Consolidated Statements of Cash Flows        

(unaudited)

Nine Months Ended September 30,	2022		2021
(millions)
Cash Flows From Operating Activities
Net income (loss)	$	(104.9)	$	2,388.6
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation	227.5		203.9
Amortization of intangible assets	25.5		43.1
Net amortization of fixed-income securities	1.6		97.2
Amortization of equity-based compensation	69.7		68.7
Net realized (gains) losses on securities	1,839.4		(1,083.9)
Net (gains) losses on disposition of property and equipment	5.3		(4.0)
Goodwill impairment	224.8		0
Changes in:
Premiums receivable	(1,468.2)		(1,994.0)
Reinsurance recoverables	(1,326.3)		(573.1)
Prepaid reinsurance premiums	90.1		(278.4)
Deferred acquisition costs	(229.6)		(193.5)
Income taxes	(591.6)		(156.2)
Unearned premiums	2,181.1		3,167.0
Loss and loss adjustment expense reserves	4,467.7		4,511.7
Accounts payable, accrued expenses, and other liabilities	546.5		1,033.0
Other, net	(39.4)		79.5
Net cash provided by operating activities	5,919.2		7,309.6
Cash Flows From Investing Activities
Purchases:
Fixed maturities	(18,672.7)		(25,222.2)
Equity securities	(126.5)		(464.9)
Sales:
Fixed maturities	9,737.6		11,747.1
Equity securities	1,467.0		625.2
Maturities, paydowns, calls, and other:
Fixed maturities	4,158.5		5,545.5
Equity securities	39.3		119.1
Net (purchases) sales of short-term investments	(3,266.6)		4,209.3
Net unsettled security transactions	(68.7)		304.2
Acquisition of Protective Insurance Corporation, net of cash, cash equivalents, and restricted cash equivalents acquired	0		(313.2)
Purchases of property and equipment	(245.0)		(188.3)
Sales of property and equipment	16.0		63.1
Net cash used in investing activities	(6,961.1)		(3,575.1)
Cash Flows From Financing Activities
Dividends paid to common shareholders	(175.5)		(2,811.5)
Dividends paid to preferred shareholders	(26.8)		(26.8)
Acquisition of treasury shares for restricted stock tax liabilities	(76.2)		(66.9)
Acquisition of treasury shares acquired in open market	(2.4)		(100.3)
Net proceeds from debt issuances	1,486.0		0
Payment of acquired company debt	0		(20.0)
Payments of debt	0		(500.0)
Net cash provided by (used in) financing activities	1,205.1		(3,525.5)
Increase in cash, cash equivalents, restricted cash, and restricted cash equivalents	163.2		209.0
Cash, cash equivalents, restricted cash, and restricted cash equivalents – January 1	202.1		76.5
Cash, cash equivalents, restricted cash, and restricted cash equivalents – September 30	$	365.3	$	285.5

See notes to consolidated financial statements.

4

The Progressive Corporation and Subsidiaries

Notes to Consolidated Financial Statements

(unaudited)

Note 1 Basis of Presentation — The accompanying consolidated financial statements include the accounts of The Progressive Corporation, our wholly owned insurance and non-insurance subsidiaries, and affiliates in which we have a controlling financial interest (Progressive).

The consolidated financial statements reflect all normal recurring adjustments that, in the opinion of management, were necessary for a fair statement of the results for the interim periods presented. The results of operations for the period ended September 30, 2022, are not necessarily indicative of the results expected for the full year. These consolidated financial statements and the notes thereto should be read in conjunction with Progressive’s audited financial statements and accompanying notes included in Exhibit 13 to our Annual Report on Form 10-K for the year ended December 31, 2021 (2021 Annual Report to Shareholders).

Insurance Premiums and Receivables

We perform analyses to evaluate our premiums receivable for expected credit losses. See the 2021 Annual Report to Shareholders for a discussion on our premiums receivable allowance for credit loss policy. The following table summarizes changes in our allowance for credit loss exposure on our premiums receivable:

	Three Months Ended September 30,				Nine Months Ended September 30,
(millions)	2022		2021		2022		2021
Allowance for credit losses, beginning of period	$	265.8	$	245.2	$	280.4	$	356.2
Allowance acquired during period1	0		0		0		3.5
Increase in allowance2	130.9		107.2		320.6		255.5
Write-offs3	(101.7)		(95.1)		(306.0)		(357.9)
Allowance for credit losses, end of period	$	295.0	$	257.3	$	295.0	$	257.3

1 Represents the amount of the allowance acquired in the Protective Insurance Corporation and subsidiaries (Protective Insurance) acquisition.

2 Represents the incremental increase in other underwriting expenses.

3 Represents portion of allowance that is reversed when premiums receivable are written off. Premiums receivable balances are written off once we have exhausted our collection efforts.

Property and Equipment

Other assets on the consolidated balance sheets include certain long-lived assets that are considered “held for sale.” The carrying value of these held-for-sale assets was $47.4 million at September 30, 2022, $12.6 million at September 30, 2021, and $10.8 million at December 31, 2021.

Goodwill and Intangible Assets

We evaluate goodwill for impairment using a qualitative or quantitative approach annually and when changes in circumstances indicate the carrying value of certain portions of goodwill may not be recoverable. See Note 12 – Goodwill and Intangible Assets for further discussion.

Earnings per Common Share

When a net loss is reported, earnings per common share are calculated using basic average equivalent shares since diluted earnings per share would be antidilutive given the net loss reported for the period. Amounts are reported on a diluted basis for all other periods presented.

5

Note 2 Investments — The following tables present the composition of our investment portfolio by major security type. Our securities are reported in our consolidated balance sheets at fair value. The changes in fair value for our fixed-maturity securities (other than hybrid securities) are reported as a component of accumulated other comprehensive income (loss), net of deferred income taxes, in our consolidated balance sheets. The net holding period gains (losses) reported below represent the inception-to-date changes in fair value of the securities. The changes in the net holding period gains (losses) between periods for the hybrid securities and equity securities are recorded as a component of net realized gains (losses) on securities in our consolidated statements of comprehensive income.

($ in millions)	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Net Holding Period Gains (Losses)		Fair Value		% of Total Fair Value
September 30, 2022
Available-for-sale securities:
Fixed maturities:
U.S. government obligations	$	24,260.9	$	0	$	(1,855.4)	$	0	$	22,405.5	42.8	%
State and local government obligations	2,140.9		0		(215.4)		0		1,925.5		3.7
Foreign government obligations	16.7		0		(1.4)		0		15.3		0.1
Corporate debt securities	10,119.8		0		(832.5)		(58.9)		9,228.4		17.6
Residential mortgage-backed securities	754.2		0.4		(16.5)		(15.1)		723.0		1.4
Commercial mortgage-backed securities	5,833.9		1.4		(747.4)		0		5,087.9		9.7
Other asset-backed securities	4,876.7		0		(268.9)		(1.9)		4,605.9		8.8
Redeemable preferred stocks	202.6		0		(5.6)		(15.4)		181.6		0.3
Total fixed maturities	48,205.7		1.8		(3,943.1)		(91.3)		44,173.1		84.4
Short-term investments	4,237.6		0		0		0		4,237.6		8.1
Total available-for-sale securities	52,443.3		1.8		(3,943.1)		(91.3)		48,410.7		92.5
Equity securities:
Nonredeemable preferred stocks	1,417.6		0		0		(163.2)		1,254.4		2.4
Common equities	803.7		0		0		1,861.6		2,665.3		5.1
Total equity securities	2,221.3		0		0		1,698.4		3,919.7		7.5
Total portfolio1	$	54,664.6	$	1.8	$	(3,943.1)	$	1,607.1	$	52,330.4	100.0	%

6

($ in millions)	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Net Holding Period Gains (Losses)		Fair Value		% of Total Fair Value
September 30, 2021
Available-for-sale securities:
Fixed maturities:
U.S. government obligations	$	21,093.1	$	144.9	$	(95.9)	$	0	$	21,142.1	40.3	%
State and local government obligations	2,123.8		48.8		(6.7)		0		2,165.9		4.1
Foreign government obligations	12.3		0		0		0		12.3		0.1
Corporate debt securities	10,556.4		314.6		(10.5)		1.2		10,861.7		20.7
Residential mortgage-backed securities	624.4		3.4		(0.9)		1.0		627.9		1.2
Commercial mortgage-backed securities	5,739.4		70.2		(20.6)		0		5,789.0		11.1
Other asset-backed securities	4,235.6		29.4		(2.8)		0		4,262.2		8.2
Redeemable preferred stocks	171.0		1.3		(0.7)		13.0		184.6		0.4
Total fixed maturities	44,556.0		612.6		(138.1)		15.2		45,045.7		86.1
Short-term investments	1,088.7		0		0		0		1,088.7		2.1
Total available-for-sale securities	45,644.7		612.6		(138.1)		15.2		46,134.4		88.2
Equity securities:
Nonredeemable preferred stocks	1,479.9		0		0		92.9		1,572.8		3.0
Common equities	1,238.4		0		0		3,341.8		4,580.2		8.8
Total equity securities	2,718.3		0		0		3,434.7		6,153.0		11.8
Total portfolio1	$	48,363.0	$	612.6	$	(138.1)	$	3,449.9	$	52,287.4	100.0	%

7

($ in millions)	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Net Holding Period Gains (Losses)		Fair Value		% of Total Fair Value
December 31, 2021
Available-for-sale securities:
Fixed maturities:
U.S. government obligations	$	18,586.1	$	92.9	$	(190.8)	$	0	$	18,488.2	35.9	%
State and local government obligations	2,162.6		36.7		(14.0)		0		2,185.3		4.2
Foreign government obligations	17.9		0		0		0		17.9		0.1
Corporate debt securities	10,526.2		202.6		(33.4)		(3.3)		10,692.1		20.7
Residential mortgage-backed securities	787.7		2.3		(0.6)		0.6		790.0		1.5
Commercial mortgage-backed securities	6,561.0		38.9		(64.3)		0		6,535.6		12.7
Other asset-backed securities	4,981.8		13.3		(12.4)		(0.4)		4,982.3		9.7
Redeemable preferred stocks	170.9		0.7		(0.5)		10.6		181.7		0.4
Total fixed maturities	43,794.2		387.4		(316.0)		7.5		43,873.1		85.2
Short-term investments	942.6		0		0		0		942.6		1.8
Total available-for-sale securities	44,736.8		387.4		(316.0)		7.5		44,815.7		87.0
Equity securities:
Nonredeemable preferred stocks	1,571.8		0		0		68.1		1,639.9		3.2
Common equities	1,264.1		0		0		3,794.4		5,058.5		9.8
Total equity securities	2,835.9		0		0		3,862.5		6,698.4		13.0
Total portfolio1	$	47,572.7	$	387.4	$	(316.0)	$	3,870.0	$	51,514.1	100.0	%

1 Includes $74.7 million, $399.7 million, and $143.4 million of net unsettled security purchase transactions at September 30, 2022 and 2021, and December 31, 2021, respectively, with the offsetting payable included in other liabilities.

The total fair value of the portfolio at September 30, 2022 and 2021, and December 31, 2021, included $4.2 billion, $2.9 billion, and $4.2 billion, respectively, of securities held in a consolidated, non-insurance subsidiary of the holding company, net of unsettled security transactions.

At September 30, 2022, bonds and certificates of deposit in the principal amount of $468.7 million were on deposit to meet state insurance regulatory requirements. We did not hold any securities of any one issuer, excluding U.S. government obligations, with an aggregate cost or fair value exceeding 10% of total shareholders’ equity at September 30, 2022 or 2021, or December 31, 2021. At September 30, 2022, we did not hold any debt securities that were non-income producing during the preceding 12 months.

Short-Term Investments Our short-term investments may include commercial paper and other investments that are expected to mature or are redeemable within one year.

We invested in repurchase and reverse repurchase transactions during 2022 and 2021, but did not have any open positions at September 30, 2022 and 2021, or December 31, 2021. To the extent we enter into repurchase or reverse repurchase transactions, consistent with past practice, we would elect not to offset these transactions and would report them on a gross basis in our consolidated balance sheets, despite the option to elect to offset these transactions as long as they were with the same counterparty and subject to an enforceable master netting arrangement.

8

Hybrid Securities Certain securities in our fixed-maturity portfolio are accounted for as hybrid securities because they contain embedded derivatives that are not deemed to be clearly and closely related to the host investments. These securities are reported at fair value:

	September 30,
(millions)	2022		2021		December 31, 2021
Fixed Maturities:
Corporate debt securities	$	500.4	$	363.3	$	479.1
Residential mortgage-backed securities	550.8		217.0		536.2
Other asset-backed securities	51.4		104.5		89.2
Redeemable preferred stocks	133.0		133.2		130.8
Total hybrid securities	$	1,235.6	$	818.0	$	1,235.3

Since the embedded derivatives (e.g., change-in-control put option, debt-to-equity conversion, or any other feature unrelated to the credit quality or risk of default of the issuer that could impact the amount or timing of our expected future cash flows) do not have observable intrinsic values, we have elected to record the changes in fair value of these securities through income as a component of net realized gains or losses.

Fixed Maturities The composition of fixed maturities by maturity at September 30, 2022, was:

(millions)	Cost		Fair Value
Less than one year	$	5,461.3	$	5,321.6
One to five years	29,752.3		27,694.2
Five to ten years	12,946.4		11,119.1
Ten years or greater	45.7		38.2
Total	$	48,205.7	$	44,173.1

Asset-backed securities are classified in the maturity distribution table based upon their projected cash flows. All other securities that do not have a single maturity date are reported based upon expected average maturity. Contractual maturities may differ from expected maturities because the issuers of the securities may have the right to call or prepay obligations.

9

Gross Unrealized Losses The following tables show the composition of gross unrealized losses by major security type and by the length of time that individual securities have been in a continuous unrealized loss position:

	Total No. of Sec.	Total Fair Value		Gross Unrealized Losses		Less than 12 Months					12 Months or Greater
($ in millions)						No. of Sec.	Fair Value		Unrealized Losses		No. of Sec.	Fair  Value		Unrealized Losses
September 30, 2022
U.S. government obligations	157	$	22,385.4	$	(1,855.4)	103	$	16,085.8	$	(1,095.6)	54	$	6,299.6	$	(759.8)
State and local government obligations	353	1,911.0		(215.4)		292	1,363.1		(129.8)		61	547.9		(85.6)
Foreign government obligations	1	15.3		(1.4)		1	15.3		(1.4)		0	0		0
Corporate debt securities	452	8,885.6		(832.5)		391	7,875.5		(699.0)		61	1,010.1		(133.5)
Residential mortgage-backed securities	44	165.1		(16.5)		34	126.0		(11.8)		10	39.1		(4.7)
Commercial mortgage-backed securities	234	5,074.3		(747.4)		182	3,856.0		(425.4)		52	1,218.3		(322.0)
Other asset-backed securities	277	4,544.8		(268.9)		217	3,597.1		(183.4)		60	947.7		(85.5)
Redeemable preferred stocks	4	48.6		(5.6)		3	37.7		(4.0)		1	10.9		(1.6)
Total fixed maturities	1,522	$	43,030.1	$	(3,943.1)	1,223	$	32,956.5	$	(2,550.4)	299	$	10,073.6	$	(1,392.7)

	Total No. of Sec.	Total Fair Value		Gross Unrealized Losses		Less than 12 Months					12 Months or Greater
($ in millions)						No. of Sec.	Fair Value		Unrealized Losses		No. of Sec.	Fair  Value		Unrealized Losses
September 30, 2021
U.S. government obligations	73	$	13,352.8	$	(95.9)	65	$	12,152.6	$	(70.1)	8	$	1,200.2	$	(25.8)
State and local government obligations	96	710.3		(6.7)		81	635.9		(4.9)		15	74.4		(1.8)
Corporate debt securities	227	1,581.3		(10.5)		225	1,551.5		(10.0)		2	29.8		(0.5)
Residential mortgage-backed securities	63	149.3		(0.9)		53	135.1		(0.6)		10	14.2		(0.3)
Commercial mortgage-backed securities	70	1,758.8		(20.6)		65	1,543.6		(19.9)		5	215.2		(0.7)
Other asset-backed securities	114	1,625.9		(2.8)		109	1,614.2		(2.7)		5	11.7		(0.1)
Redeemable preferred stocks	1	11.8		(0.7)		0	0		0		1	11.8		(0.7)
Total fixed maturities	644	$	19,190.2	$	(138.1)	598	$	17,632.9	$	(108.2)	46	$	1,557.3	$	(29.9)

	Total No. of Sec.	Total Fair Value		Gross Unrealized Losses		Less than 12 Months					12 Months or Greater
($ in millions)						No. of Sec.	Fair Value		Unrealized Losses		No. of Sec.	Fair  Value		Unrealized Losses
December 31, 2021
U.S. government obligations	92	$	14,745.8	$	(190.8)	85	$	13,790.8	$	(158.5)	7	$	955.0	$	(32.3)
State and local government obligations	127	954.2		(14.0)		122	927.3		(13.1)		5	26.9		(0.9)
Corporate debt securities	220	3,496.6		(33.4)		219	3,491.7		(33.3)		1	4.9		(0.1)
Residential mortgage-backed securities	20	138.6		(0.6)		14	135.4		(0.5)		6	3.2		(0.1)
Commercial mortgage-backed securities	168	4,315.4		(64.3)		165	4,295.0		(63.9)		3	20.4		(0.4)
Other asset-backed securities	178	3,204.7		(12.4)		176	3,200.6		(12.3)		2	4.1		(0.1)
Redeemable preferred stocks	1	12.0		(0.5)		0	0		0		1	12.0		(0.5)
Total fixed maturities	806	$	26,867.3	$	(316.0)	781	$	25,840.8	$	(281.6)	25	$	1,026.5	$	(34.4)

The increase in the number of securities in an unrealized loss position since both September 30, 2021 and December 31, 2021, was primarily the result of an increase in interest rates. As of September 30, 2022, we had five corporate debt securities that had their credit ratings downgraded during the quarter, with a combined fair value of $99.3 million and an unrealized loss of $23.7 million.

A review of the securities in an unrealized loss position indicated that the issuers were current with respect to their interest obligations and that there was no evidence of deterioration of the current cash flow projections that would indicate we would not receive the remaining principal at maturity.

10

Allowance For Credit and Uncollectible Losses We are required to measure the amount of potential credit losses for all fixed-maturity securities in an unrealized loss position. We did not record any allowances for credit losses or any write-offs for amounts deemed to be uncollectible during the first nine months of 2022 or 2021, and did not have a material credit loss allowance balance as of September 30, 2022 and 2021, or December 31, 2021. We considered several factors and inputs related to the individual securities as part of our analysis. The methodology and significant inputs used to measure the amount of credit losses in our portfolio included:

•current performance indicators on the business model or underlying assets (e.g., delinquency rates, foreclosure rates, and default rates);

•credit support (via current levels of subordination);

•historical credit ratings; and

•updated cash flow expectations based upon these performance indicators.

In order to determine the amount of credit loss, if any, we initially reviewed securities in a loss position to determine whether it was likely that we would be required, or intended, to sell any of the securities prior to the recovery of their respective cost bases (which could be maturity). If we were likely to, or intended to, sell prior to a potential recovery, we would write off the unrealized loss. For those securities that we determined we were not likely to, or did not intend to, sell prior to a potential recovery, we calculated the net present value (NPV) of the cash flows expected (i.e., expected recovery value) using the current book yield for each security. The NPV was then compared to the security’s current amortized value to determine if a credit loss existed. In the event that the NPV was below the amortized value, and the amount was determined to be material individually, or in aggregate, a credit loss would be deemed to exist, and either an allowance for credit losses would be created, or if an allowance currently existed, either a recovery of the previous allowance, or an incremental loss, would be recorded to net realized gains (losses) on securities.

As of September 30, 2022 and 2021, and December 31, 2021, we believe none of the unrealized losses relate to material credit losses on any specific securities, or in the aggregate. We continue to expect all the securities in our portfolio to pay their principal and interest obligations.

In addition, we reviewed our accrued investment income outstanding on those securities in an unrealized loss position at September 30, 2022 and 2021, and December 31, 2021, to determine if the accrued interest amounts were determined to be uncollectible. Based on our analysis, we believe the issuers have sufficient liquidity and capital reserves to meet their current interest, and future principal, obligations and, therefore, did not write off any accrued income as uncollectible at September 30, 2022 and 2021, or December 31, 2021.

11

Realized Gains (Losses) The components of net realized gains (losses) for the three and nine months ended September 30, were:

	Three Months				Nine Months
(millions)	2022		2021		2022		2021
Gross realized gains on security sales
Available-for-sale securities:
U.S. government obligations	$	0	$	19.6	$	4.6	$	97.5
State and local government obligations	0		6.0		0		50.3
Corporate and other debt securities	0.3		23.6		6.8		84.4
Residential mortgage-backed securities	0		0		0.7		0.3
Commercial mortgage-backed securities	0		1.4		0		40.7
Other asset-backed securities	0		0.3		0.1		1.0
Redeemable preferred stocks	0		0		0		1.5
Total available-for-sale securities	0.3		50.9		12.2		275.7
Equity securities:
Nonredeemable preferred stocks	0.1		2.3		17.6		26.0
Common equities	1.4		6.2		832.5		352.3
Total equity securities	1.5		8.5		850.1		378.3
Subtotal gross realized gains on security sales	1.8		59.4		862.3		654.0
Gross realized losses on security sales
Available-for-sale securities:
U.S. government obligations	0		(2.0)		(233.5)		(28.5)
State and local government obligations	0		0		(1.0)		(3.0)
Corporate and other debt securities	(14.0)		(0.7)		(51.8)		(6.1)
Residential mortgage-backed securities	0		(0.3)		0		(0.3)
Commercial mortgage-backed securities	(44.8)		(0.5)		(58.6)		(1.6)
Other asset-backed securities	0		0		(2.1)		(0.4)
Short-term investments	0		0		(0.3)		0
Total available-for-sale securities	(58.8)		(3.5)		(347.3)		(39.9)
Equity securities:
Nonredeemable preferred stocks	(5.1)		(0.3)		(7.0)		(0.7)
Common equities	0		(1.7)		(78.0)		(5.6)
Total equity securities	(5.1)		(2.0)		(85.0)		(6.3)
Subtotal gross realized losses on security sales	(63.9)		(5.5)		(432.3)		(46.2)
Net realized gains (losses) on security sales
Available-for-sale securities:
U.S. government obligations	0		17.6		(228.9)		69.0
State and local government obligations	0		6.0		(1.0)		47.3
Corporate and other debt securities	(13.7)		22.9		(45.0)		78.3
Residential mortgage-backed securities	0		(0.3)		0.7		0
Commercial mortgage-backed securities	(44.8)		0.9		(58.6)		39.1
Other asset-backed securities	0		0.3		(2.0)		0.6
Redeemable preferred stocks	0		0		0		1.5
Short-term investments	0		0		(0.3)		0
Total available-for-sale securities	(58.5)		47.4		(335.1)		235.8
Equity securities:
Nonredeemable preferred stocks	(5.0)		2.0		10.6		25.3
Common equities	1.4		4.5		754.5		346.7
Total equity securities	(3.6)		6.5		765.1		372.0
Subtotal net realized gains (losses) on security sales	(62.1)		53.9		430.0		607.8
Net holding period gains (losses)
Hybrid securities	(11.4)		1.0		(98.8)		0
Equity securities	(140.7)		(16.9)		(2,164.1)		479.8
Subtotal net holding period gains (losses)	(152.1)		(15.9)		(2,262.9)		479.8
Other asset impairment	(2.2)		(1.2)		(6.5)		(3.7)
Total net realized gains (losses) on securities	$	(216.4)	$	36.8	$	(1,839.4)	$	1,083.9

12

Realized gains (losses) on securities sold are computed using the first-in-first-out method. The loss from the fixed-maturity sales reflected the continued rise in interest rates throughout 2022, which resulted in valuation declines for most of our available-for-sale securities. The majority of the sales in the fixed-maturity portfolio during the first nine months of 2022 were from U.S. Treasuries, which were sold to shorten duration. During the third quarter 2022, we selectively sold securities, which were primarily commercial mortgage-backed securities. During the first nine months of 2022, we sold common equity securities, which were in a realized gain position, as part of our plan to incrementally reduce risk in the portfolio in response to the likelihood of a more difficult economic environment over the near term. The other asset impairment loss was recorded as a result of our investment in a federal new markets tax credit fund, which was entered into during the second quarter 2021, and reported in other assets in the consolidated balance sheets.

The following table reflects our holding period realized gains (losses) recognized on equity securities held at the respective quarter ends:

	Three Months				Nine Months
(millions)	2022		2021		2022		2021
Total net gains (losses) recognized during the period on equity securities	$	(144.3)	$	(10.4)	$	(1,399.0)	$	851.8
Less: Net gains (losses) recognized on equity securities sold during the period	(3.6)		6.5		765.1		372.0
Net holding period gains (losses) recognized during the period on equity securities held at period end	$	(140.7)	$	(16.9)	$	(2,164.1)	$	479.8

Net Investment Income The components of net investment income for the three and nine months ended September 30, were: 

	Three Months				Nine Months
(millions)	2022		2021		2022		2021
Available-for-sale securities:
Fixed maturities:
U.S. government obligations	$	86.1	$	39.0	$	205.4	$	106.8
State and local government obligations	9.8		9.7		29.3		34.6
Foreign government obligations	0.1		0		0.2		0
Corporate debt securities	71.8		70.2		215.4		228.6
Residential mortgage-backed securities	8.8		3.2		23.2		9.4
Commercial mortgage-backed securities	48.3		35.0		138.1		105.2
Other asset-backed securities	52.1		16.1		116.5		47.1
Redeemable preferred stocks	3.0		2.3		8.5		7.1
Total fixed maturities	280.0		175.5		736.6		538.8
Short-term investments	24.8		0.4		29.6		2.6
Total available-for-sale securities	304.8		175.9		766.2		541.4
Equity securities:
Nonredeemable preferred stocks	17.3		17.3		53.6		52.5
Common equities	11.5		15.7		48.4		45.9
Total equity securities	28.8		33.0		102.0		98.4
Investment income	333.6		208.9		868.2		639.8
Investment expenses	(5.8)		(6.6)		(17.4)		(18.5)
Net investment income	$	327.8	$	202.3	$	850.8	$	621.3

On a year-over-year basis for the three and nine months ended September 30, 2022, investment income (interest and dividends) increased 60% and 36%, respectively, compared to the same periods last year, primarily due to an increase in interest rates on floating-rate securities in our portfolio and purchases of new investments with higher coupon rates. The recurring investment book yield increased 39% for the third quarter 2022 and 16% for the first nine months of 2022, compared to the same periods in 2021, reflecting investing new cash and cash from maturities in higher interest rate securities given the rising interest rate environment.

13

Note 3 Fair Value — We have categorized our financial instruments, based on the degree of subjectivity inherent in the method by which they are valued, into a fair value hierarchy of three levels, as follows:

•Level 1: Inputs are unadjusted, quoted prices in active markets for identical instruments at the measurement date (e.g., U.S. government obligations, which are continually priced on a daily basis, active exchange-traded equity securities, and certain short-term securities).

•Level 2: Inputs (other than quoted prices included within Level 1) that are observable for the instrument either directly or indirectly (e.g., certain corporate and municipal bonds and certain preferred stocks). This includes: (i) quoted prices for similar instruments in active markets, (ii) quoted prices for identical or similar instruments in markets that are not active, (iii) inputs other than quoted prices that are observable for the instruments, and (iv) inputs that are derived principally from or corroborated by observable market data by correlation or other means.

•Level 3: Inputs that are unobservable. Unobservable inputs reflect our subjective evaluation about the assumptions market participants would use in pricing the financial instrument (e.g., certain structured securities and privately held investments).

Determining the fair value of the investment portfolio is the responsibility of management. As part of the responsibility, we evaluate whether a market is distressed or inactive in determining the fair value for our portfolio. We review certain market level inputs to evaluate whether sufficient activity, volume, and new issuances exist to create an active market. Based on this evaluation, we concluded that there was sufficient activity related to the sectors and securities for which we obtained valuations.

14

The composition of the investment portfolio by major security type and our outstanding debt was:

	Fair Value
(millions)	Level 1		Level 2		Level 3		Total		Cost
September 30, 2022
Fixed maturities:
U.S. government obligations	$	22,405.5	$	0	$	0	$	22,405.5	$	24,260.9
State and local government obligations	0		1,925.5		0		1,925.5		2,140.9
Foreign government obligations	0		15.3		0		15.3		16.7
Corporate debt securities	0		9,228.4		0		9,228.4		10,119.8
Subtotal	22,405.5		11,169.2		0		33,574.7		36,538.3
Asset-backed securities:
Residential mortgage-backed	0		723.0		0		723.0		754.2
Commercial mortgage-backed	0		5,087.9		0		5,087.9		5,833.9
Other asset-backed	0		4,605.9		0		4,605.9		4,876.7
Subtotal asset-backed securities	0		10,416.8		0		10,416.8		11,464.8
Redeemable preferred stocks:
Financials	0		39.8		0		39.8		43.6
Utilities	0		8.8		0		8.8		10.5
Industrials	8.9		124.1		0		133.0		148.5
Subtotal redeemable preferred stocks	8.9		172.7		0		181.6		202.6
Total fixed maturities	22,414.4		21,758.7		0		44,173.1		48,205.7
Short-term investments	4,219.6		18.0		0		4,237.6		4,237.6
Total available-for-sale securities	26,634.0		21,776.7		0		48,410.7		52,443.3
Equity securities:
Nonredeemable preferred stocks:
Financials	60.9		1,015.6		64.9		1,141.4		1,297.6
Utilities	0		71.3		0		71.3		79.9
Industrials	0		24.7		17.0		41.7		40.1
Subtotal nonredeemable preferred stocks	60.9		1,111.6		81.9		1,254.4		1,417.6
Common equities:
Common stocks	2,597.3		49.3		0		2,646.6		785.0
Other risk investments	0		0		18.7		18.7		18.7
Subtotal common equities	2,597.3		49.3		18.7		2,665.3		803.7
Total equity securities	2,658.2		1,160.9		100.6		3,919.7		2,221.3
Total portfolio	$	29,292.2	$	22,937.6	$	100.6	$	52,330.4	$	54,664.6
Debt	$	0	$	5,634.7	$	0	$	5,634.7	$	6,387.4

15

	Fair Value
(millions)	Level 1		Level 2		Level 3		Total		Cost
September 30, 2021
Fixed maturities:
U.S. government obligations	$	21,142.1	$	0	$	0	$	21,142.1	$	21,093.1
State and local government obligations	0		2,165.9		0		2,165.9		2,123.8
Foreign government obligations	0		12.3		0		12.3		12.3
Corporate debt securities	0		10,861.7		0		10,861.7		10,556.4
Subtotal	21,142.1		13,039.9		0		34,182.0		33,785.6
Asset-backed securities:
Residential mortgage-backed	0		627.9		0		627.9		624.4
Commercial mortgage-backed	0		5,789.0		0		5,789.0		5,739.4
Other asset-backed	0		4,262.2		0		4,262.2		4,235.6
Subtotal asset-backed securities	0		10,679.1		0		10,679.1		10,599.4
Redeemable preferred stocks:
Financials	0		51.4		0		51.4		50.8
Utilities	0		0		0		0		0
Industrials	10.6		122.6		0		133.2		120.2
Subtotal redeemable preferred stocks	10.6		174.0		0		184.6		171.0
Total fixed maturities	21,152.7		23,893.0		0		45,045.7		44,556.0
Short-term investments	1,078.5		10.2		0		1,088.7		1,088.7
Total available-for-sale securities	22,231.2		23,903.2		0		46,134.4		45,644.7
Equity securities:
Nonredeemable preferred stocks:
Financials	89.8		1,304.6		76.4		1,470.8		1,399.8
Utilities	0		42.1		0		42.1		40.0
Industrials	0		25.5		34.4		59.9		40.1
Subtotal nonredeemable preferred stocks	89.8		1,372.2		110.8		1,572.8		1,479.9
Common equities:
Common stocks	4,513.1		0		54.5		4,567.6		1,225.8
Other risk investments	0		0		12.6		12.6		12.6
Subtotal common equities	4,513.1		0		67.1		4,580.2		1,238.4
Total equity securities	4,602.9		1,372.2		177.9		6,153.0		2,718.3
Total portfolio	$	26,834.1	$	25,275.4	$	177.9	$	52,287.4	$	48,363.0
Debt	$	0	$	5,881.7	$	0	$	5,881.7	$	4,898.2

16

	Fair Value
(millions)	Level 1		Level 2		Level 3		Total		Cost
December 31, 2021
Fixed maturities:
U.S. government obligations	$	18,488.2	$	0	$	0	$	18,488.2	$	18,586.1
State and local government obligations	0		2,185.3		0		2,185.3		2,162.6
Foreign government obligations	0		17.9		0		17.9		17.9
Corporate debt securities	0		10,692.1		0		10,692.1		10,526.2
Subtotal	18,488.2		12,895.3		0		31,383.5		31,292.8
Asset-backed securities:
Residential mortgage-backed	0		790.0		0		790.0		787.7
Commercial mortgage-backed	0		6,535.6		0		6,535.6		6,561.0
Other asset-backed	0		4,982.3		0		4,982.3		4,981.8
Subtotal asset-backed securities	0		12,307.9		0		12,307.9		12,330.5
Redeemable preferred stocks:
Financials	0		50.9		0		50.9		50.7
Utilities	0		0		0		0		0
Industrials	10.7		120.1		0		130.8		120.2
Subtotal redeemable preferred stocks	10.7		171.0		0		181.7		170.9
Total fixed maturities	18,498.9		25,374.2		0		43,873.1		43,794.2
Short-term investments	942.4		0.2		0		942.6		942.6
Total available-for-sale securities	19,441.3		25,374.4		0		44,815.7		44,736.8
Equity securities:
Nonredeemable preferred stocks:
Financials	115.3		1,305.7		76.4		1,497.4		1,451.7
Utilities	0		82.9		0		82.9		80.0
Industrials	0		25.2		34.4		59.6		40.1
Subtotal nonredeemable preferred stocks	115.3		1,413.8		110.8		1,639.9		1,571.8
Common equities:
Common stocks	4,991.6		50.0		0		5,041.6		1,247.2
Other risk investments	0		0		16.9		16.9		16.9
Subtotal common equities	4,991.6		50.0		16.9		5,058.5		1,264.1
Total equity securities	5,106.9		1,463.8		127.7		6,698.4		2,835.9
Total portfolio	$	24,548.2	$	26,838.2	$	127.7	$	51,514.1	$	47,572.7
Debt	$	0	$	5,857.4	$	0	$	5,857.4	$	4,898.8

Our portfolio valuations, excluding short-term investments, classified as either Level 1 or Level 2 in the above tables are priced exclusively by external sources, including pricing vendors, dealers/market makers, and exchange-quoted prices.

Our short-term investments classified as Level 1 are highly liquid, actively marketed, and have a very short duration, primarily 90 days or less to redemption. These securities are held at their original cost, adjusted for any accretion of discount, since that value very closely approximates what an active market participant would be willing to pay for such securities. The remainder of our short-term investments are classified as Level 2 and are not priced externally since these securities continually trade at par value. These securities are classified as Level 2 since they are primarily longer-dated securities issued by municipalities that contain either liquidity facilities or mandatory put features within one year.

At September 30, 2022, vendor-quoted prices represented 90% of our Level 1 classifications (excluding short-term investments), compared to 82% and 79% at September 30, 2021 and December 31, 2021, respectively. The securities quoted by vendors in Level 1 primarily represent our holdings in U.S. Treasury Notes, which are frequently traded, and the quotes are considered similar to exchange-traded quotes. The balance of our Level 1 pricing comes from quotes obtained directly from trades made on active exchanges.

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At both September 30, 2022 and December 31, 2021, vendor-quoted prices comprised 98% of our Level 2 classifications (excluding short-term investments and common stock), while dealer-quoted prices represented the remaining 2%, compared to 97% and 3% at September 30, 2021. In our process for selecting a source (e.g., dealer or pricing service) to provide pricing for securities in our portfolio, we reviewed documentation from the sources that detailed the pricing techniques and methodologies used by these sources and determined if their policies adequately considered market activity, either based on specific transactions for the particular security type or based on modeling of securities with similar credit quality, duration, yield, and structure that were recently transacted. Once a source is chosen, we continue to monitor any changes or modifications to their processes by reviewing their documentation on internal controls for pricing and market reviews. We review quality control measures of our sources as they become available to determine if any significant changes have occurred from period to period that might indicate issues or concerns regarding their evaluation or market coverage.

As part of our pricing procedures, we obtain quotes from more than one source to help us fully evaluate the market price of securities. However, our internal pricing policy is to use a consistent source for individual securities in order to maintain the integrity of our valuation process. Quotes obtained from the sources are not considered binding offers to transact. Under our policy, when a review of the valuation received from our selected source appears to be outside of what is considered market level activity (which is defined as trading at spreads or yields significantly different than those of comparable securities or outside the general sector level movement without a reasonable explanation), we may use an alternate source’s price. To the extent we determine that it may be prudent to substitute one source’s price for another, we will contact the initial source to obtain an understanding of the factors that may be contributing to the significant price variance.

To allow us to determine if our initial source is providing a price that is outside of a reasonable range, we review our portfolio pricing on a weekly basis. When necessary, we challenge prices from our sources when a price provided does not match our expectations based on our evaluation of market trends and activity. Initially, we perform a review of our portfolio by sector to identify securities whose prices appear outside of a reasonable range. We then perform a more detailed review of fair values for securities disclosed as Level 2. We review dealer bids and quotes for these and/or similar securities to determine the market level context for our valuations. We then evaluate inputs relevant for each class of securities disclosed in the preceding hierarchy tables.

For structured debt securities, including commercial, residential, and other asset-backed securities, we evaluate available market-related data for these and similar securities related to collateral, delinquencies, and defaults for historical trends and reasonably estimable projections, as well as historical prepayment rates and current prepayment assumptions and cash flow estimates. We further stratify each class of our structured debt securities into more finite sectors (e.g., planned amortization class, first pay, second pay, senior, subordinated, etc.) and use duration, credit quality, and coupon to determine if the fair value is appropriate.

For corporate debt and preferred stock (redeemable and nonredeemable) portfolios, as well as the notes issued by The Progressive Corporation (see Note 4 – Debt), we review securities by duration, coupon, and credit quality, as well as changes in interest rate and credit spread movements within that stratification. The review also includes recent trades, including: volume traded at various levels that establish a market; issuer specific fundamentals; and industry specific economic news as it comes to light.

For municipal securities (e.g., general obligations, revenue, and housing), we stratify the portfolio to evaluate securities by type, coupon, credit quality, and duration to review price changes relative to credit spread and interest rate changes. Additionally, we look to economic data as it relates to geographic location as an indication of price-to-call or maturity predictors. For municipal housing securities, we look to changes in cash flow projections, both historical and reasonably estimable projections, to understand yield changes and their effect on valuation.

For short-term securities, we look at acquisition price relative to the coupon or yield. Since our short-term securities are typically 90 days or less to maturity, with the majority listed in Level 2 being 30 days or less to redemption, we believe that acquisition price is the best estimate of fair value.

We also review data assumptions as supplied by our sources to determine if that data is relevant to current market conditions. In addition, we independently review each sector for transaction volumes, new issuances, and changes in spreads, as well as the overall movement of interest rates along the yield curve to determine if sufficient activity and liquidity exists to provide a credible source for our market valuations.

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During each valuation period, we create internal estimations of portfolio valuation (performance returns), based on current market-related activity (i.e., interest rate and credit spread movements and other credit-related factors) within each major sector of our portfolio. We compare our internally generated portfolio results with those generated based on quotes we receive externally and research material valuation differences. We compare our results to index returns for each major sector adjusting for duration and credit quality differences to better understand our portfolio’s results. Additionally, we review on a monthly basis our external sales transactions and compare the actual final market sales prices to previous market valuation prices. This review provides us further validation that our pricing sources are providing market level prices, since we are able to explain significant price changes (i.e., greater than 2%) as known events occur in the marketplace and affect a particular security’s price at sale.

This analysis provides us with additional comfort regarding the source’s process, the quality of its review, and its willingness to improve its analysis based on feedback from clients. We believe this effort helps ensure that we are reporting the most representative fair values for our securities.

After all the valuations are received and our review of Level 2 securities is complete, if the inputs used by vendors are determined to not contain sufficient observable market information, we will reclassify the affected securities to Level 3.

Except as described below, our Level 3 securities are priced externally; however, due to several factors (e.g., nature of the securities, level of activity, and lack of similar securities trading to obtain observable market level inputs), these valuations are more subjective in nature.

To the extent we receive prices from external sources (e.g., broker, valuation firm) for the Level 3 securities, we review those prices for reasonableness using internally developed assumptions and then compare our derived prices to the prices received from the external sources. Based on our review, all prices received from external sources remained unadjusted.

If we do not receive prices from an external source, we perform an internal fair value comparison, which includes a review and analysis of market-comparable securities, to determine if fair value changes are needed. Based on this analysis, certain private equity investments included in the Level 3 category remain valued at cost or were priced using a recent transaction as the basis for fair value. At least annually, these private equity investments are priced by an external source.

Our Level 3 other risk investments include securities accounted for under the equity method of accounting and, therefore, are not subject to fair value reporting. Since these securities represent less than 0.1% of our total portfolio, we will continue to include them in our Level 3 disclosures and report the activity from these investments as “other” changes in the summary of changes in fair value table and categorize these securities as “pricing exemption securities” in the quantitative information table.

The Level 3 common stock held at September 30, 2021 was transferred to Level 2 at December 31, 2021. At September 30, 2022 and 2021, and December 31, 2021, we did not have any securities in our fixed-maturity portfolio listed as Level 3.

Other than goodwill, during the third quarter and first nine months of 2022 and 2021, there were no material assets or liabilities measured at fair value on a nonrecurring basis. During the second quarter 2022, we determined that the fair value of the goodwill related to our ARX Holding Corp. (ARX) reporting unit was less than the carrying value and we wrote down $224.8 million of our total goodwill asset. See Note 12 – Goodwill and Intangible Assets for further discussion. Due to the relative size of the Level 3 securities’ fair values compared to the total portfolio’s fair value, any changes in pricing methodology would not have a significant change in valuation that would materially impact net or comprehensive income.

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The following tables provide a summary of changes in fair value associated with Level 3 assets for the three and nine months ended September 30, 2022 and 2021:

	Level 3 Fair Value
(millions)	Fair Value at June 30, 2022		Calls/ Maturities/ Paydowns/Other		Purchases		Sales		Net Realized (Gain)/Loss on Sales		Change in Valuation		Net Transfers In (Out)		Fair Value at September 30, 2022
Equity securities:
Nonredeemable preferred stocks:
Financials	$	64.9	$	0	$	0	$	0	$	0	$	0	$	0	$	64.9
Industrials	17.0		0		0		0		0		0		0		17.0
Common equities:
Other risk investments	18.5		0.2		0		0		0		0		0		18.7
Total Level 3 securities	$	100.4	$	0.2	$	0	$	0	$	0	$	0	$	0	$	100.6
	Level 3 Fair Value
(millions)	Fair Value at June 30, 2021		Calls/ Maturities/ Paydowns/Other		Purchases		Sales		Net Realized (Gain)/Loss on Sales		Change in Valuation		Net Transfers In (Out)		Fair Value at September 30, 2021
Equity securities:
Nonredeemable preferred stocks:
Financials	$	76.4	$	0	$	0	$	0	$	0	$	0	$	0	$	76.4
Industrials	34.4		0		0		0		0		0		0		34.4
Common equities:
Common stocks	52.5		0		2.0		0		0		0		0		54.5
Other risk investments	11.6		1.0		0		0		0		0		0		12.6
Total Level 3 securities	$	174.9	$	1.0	$	2.0	$	0	$	0	$	0	$	0	$	177.9
	Level 3 Fair Value
(millions)	Fair Value at Dec. 31, 2021		Calls/ Maturities/ Paydowns/Other		Purchases		Sales		Net Realized (Gain)/Loss on Sales		Change in Valuation		Net Transfers In (Out)		Fair Value at September 30, 2022
Equity securities:
Nonredeemable preferred stocks:
Financials	$	76.4	$	0	$	0	$	(15.0)	$	(17.2)	$	20.7	$	0	$	64.9
Industrials	34.4		(0.5)		0		0		0		(16.9)		0		17.0
Common equities:
Other risk investments	16.9		1.8		0		0		0		0		0		18.7
Total Level 3 securities	$	127.7	$	1.3	$	0	$	(15.0)	$	(17.2)	$	3.8	$	0	$	100.6

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	Level 3 Fair Value
(millions)	Fair Value at Dec. 31, 2020		Calls/ Maturities/ Paydowns/Other		Purchases		Sales		Net Realized (Gain)/Loss on Sales		Change in Valuation		Net Transfers In (Out)		Fair Value at September 30, 2021
Equity securities:
Nonredeemable preferred stocks:
Financials	$	10.0	$	0	$	60.2	$	0	$	0	$	6.2	$	0	$	76.4
Industrials	16.7		0		5.0		(5.0)		(4.5)		22.2		0		34.4
Common equities:
Common stocks	25.0		0		2.0		0		0		27.5		0		54.5
Other risk investments	3.1		9.5		0		0		0		0		0		12.6
Total Level 3 securities	$	54.8	$	9.5	$	67.2	$	(5.0)	$	(4.5)	$	55.9	$	0	$	177.9

The following tables provide a summary of the quantitative information about Level 3 fair value measurements for our applicable securities at September 30, 2022 and 2021, and December 31, 2021:

	Quantitative Information about Level 3 Fair Value Measurements
($ in millions)	Fair Value at September 30, 2022		Valuation Technique	Unobservable Input	Range of Input Values Increase (Decrease)	Weighted Average Increase (Decrease)
Equity securities:
Nonredeemable preferred stocks	$	81.9	Market comparables	Weighted average market capitalization price change %	(20.7)% to (1.1)%	(6.6)	%
Subtotal Level 3 securities	81.9
Pricing exemption securities	18.7
Total Level 3 securities	$	100.6

	Quantitative Information about Level 3 Fair Value Measurements
($ in millions)	Fair Value at September 30, 2021		Valuation Technique	Unobservable Input	Range of Input Values Increase (Decrease)	Weighted Average Increase (Decrease)
Equity securities:
Nonredeemable preferred stocks	$	110.8	Market comparables	Weighted average market capitalization price change %	(8.5)% to 19.8%	6.5	%
Common stocks	54.5		Market comparables	Weighted average market capitalization price change %	(1.6)% to 55.8%	0.9	%
Subtotal Level 3 securities	165.3
Pricing exemption securities	12.6
Total Level 3 securities	$	177.9

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	Quantitative Information about Level 3 Fair Value Measurements
($ in millions)	Fair Value at Dec. 31, 2021		Valuation Technique	Unobservable Input	Range of Input Values Increase (Decrease)	Weighted Average Increase (Decrease)
Equity securities:
Nonredeemable preferred stocks	$	110.8	Market comparables	Weighted average market capitalization price change %	(20.2)% to (2.3)%	(7.7)%
Subtotal Level 3 securities	110.8
Pricing exemption securities	16.9
Total Level 3 securities	$	127.7

Note 4 Debt — Debt at each of the balance sheet periods consisted of:

	September 30, 2022				September 30, 2021				December 31, 2021
(millions)	Carrying Value		Fair Value		Carrying Value		Fair Value		Carrying Value		Fair Value
2.45% Senior Notes due 2027 (issued: $500.0, August 2016)	$	498.1	$	459.7	$	497.6	$	530.6	$	497.7	$	517.9
2.50% Senior Notes due 2027 (issued: $500.0, March 2022)	497.4		451.6		0		0		0		0
6 5/8% Senior Notes due 2029 (issued: $300.0, March 1999)	297.4		322.1		297.1		390.9		297.2		388.2
4.00% Senior Notes due 2029 (issued: $550.0, October 2018)	546.3		519.5		545.8		627.9		545.9		621.0
3.20% Senior Notes due 2030 (issued: $500.0, March 2020)	496.8		439.3		496.4		543.2		496.5		536.3
3.00% Senior Notes due 2032 (issued: $500.0, March 2022)	495.8		418.8		0		0		0		0
6.25% Senior Notes due 2032 (issued: $400.0, November 2002)	396.4		426.0		396.1		545.5		396.2		547.9
4.35% Senior Notes due 2044 (issued: $350.0, April 2014)	346.9		298.5		346.8		433.6		346.8		428.4
3.70% Senior Notes due 2045 (issued: $400.0, January 2015)	395.7		305.7		395.6		456.2		395.6		447.1
4.125% Senior Notes due 2047 (issued: $850.0, April 2017)	842.0		710.3		841.9		1,018.5		841.9		1,029.3
4.20% Senior Notes due 2048 (issued: $600.0, March 2018)	590.3		505.9		590.2		736.3		590.2		741.3
3.95% Senior Notes due 2050 (issued: $500.0, March 2020)	490.9		396.6		490.7		599.0		490.8		600.0
3.70% Senior Notes due 2052 (issued: $500.0, March 2022)	493.4		380.7		0		0		0		0
Total	$	6,387.4	$	5,634.7	$	4,898.2	$	5,881.7	$	4,898.8	$	5,857.4

The Progressive Corporation issued $500 million of 2.50% Senior Notes due 2027, $500 million of 3.00% Senior Notes due 2032, and $500 million of 3.70% Senior Notes due 2052 in March 2022, in an underwritten public offering. The net proceeds from the issuances, after deducting underwriters’ discounts, commissions, and other issuance costs, were approximately $1,486.0 million in aggregate. Consistent with the other senior notes issued by Progressive, interest on these notes is payable semiannually, principal is due at maturity, and the notes are redeemable, in whole or in part, at any time, subject to a treasury “make whole” provision.

There was no short-term debt outstanding at September 30, 2022 and 2021, and December 31, 2021.

The Progressive Corporation has a line of credit with PNC Bank, National Association (PNC), in the maximum principal amount of $250 million, which has the same terms as the line of credit with PNC that expired in April 2022. See the 2021 Annual Report to Shareholders for a discussion of the terms of this line of credit. We had no borrowings under the line of credit during the periods presented.

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Note 5 Income Taxes — Deferred tax assets and liabilities are recorded based on the difference between the financial statement and tax bases of assets and liabilities at the enacted tax rates. We review our deferred tax assets regularly for recoverability. At September 30, 2022 and 2021, and December 31, 2021, we determined that we did not need a valuation allowance on our gross deferred tax assets. Although realization of the deferred tax assets is not assured, management believes that it is more likely than not the deferred tax assets will be realized based on our expectation that we will be able to fully utilize the deductions that are ultimately recognized for tax purposes.

For the nine months ended September 30, 2022, there have been no material changes in our reserve for uncertain tax positions.

The effective tax rate for the three and nine months ended September 30, 2022, was 12.9% and (1.6)%, respectively, compared to 14.7% and 20.5% for the same periods last year. The difference between our effective tax rate and the statutory rate, for the three months ended September 30, 2022 and 2021, and the nine months ended September 30, 2022, is primarily driven by the low amount of income (loss) before taxes during those periods. The provision for income taxes differed from the statutory rate as follows:

	Three Months Ended September 30,								Nine Months Ended September 30,
($ in millions)	2022				2021				2022				2021
Income (loss) before income taxes	$	142.5			$	139.0			$	(103.2)			$	3,006.1
Tax at statutory federal rate	$	29.9	21.0	%	$	29.2	21.0	%	$	(21.7)	21.0	%	$	631.3	21.0	%
Tax effect of:
Goodwill impairment	0		0		0		0		47.2		(45.7)		0		0
Stock-based compensation	(9.6)		(6.7)		(7.9)		(5.7)		(17.7)		17.2		(19.2)		(0.6)
State income taxes, net of federal taxes	4.5		3.2		5.5		4.0		9.7		(9.4)		17.7		0.6
Tax-preferenced investment income	(2.8)		(2.0)		(3.3)		(2.4)		(9.5)		9.2		(10.0)		(0.3)
Tax credits	(5.2)		(3.6)		(3.7)		(2.7)		(9.4)		9.1		(6.1)		(0.2)
Nondeductible compensation expense	1.8		1.3		1.9		1.4		5.4		(5.2)		5.6		0.2
Tax deductible dividends	(0.4)		(0.3)		(0.5)		(0.4)		(1.4)		1.4		(1.6)		(0.1)
Other items, net	0.2		0		(0.7)		(0.5)		(0.9)		0.8		(0.2)		(0.1)
Total income tax provision	$	18.4	12.9	%	$	20.5	14.7	%	$	1.7	(1.6)	%	$	617.5	20.5	%

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Note 6 Loss and Loss Adjustment Expense Reserves — Activity in the loss and loss adjustment expense reserves is summarized as follows:

	September 30,
(millions)	2022		2021
Balance at January 1	$	26,164.1	$	20,265.8
Less reinsurance recoverables on unpaid losses	4,733.6		3,798.2
Net balance at January 1	21,430.5		16,467.6
Net loss and loss adjustment expense reserves acquired1	0		732.5
Total beginning reserves	21,430.5		17,200.1
Incurred related to:
Current year	28,245.4		24,610.8
Prior years	52.8		156.8
Total incurred	28,298.2		24,767.6
Paid related to:
Current year	15,712.4		13,650.6
Prior years	9,418.5		7,213.3
Total paid	25,130.9		20,863.9
Net balance at September 30	24,597.8		21,103.8
Plus reinsurance recoverables on unpaid losses	6,034.0		4,822.5
Balance at September 30	$	30,631.8	$	25,926.3

1 Net reserves acquired in the Protective Insurance acquisition.

We experienced unfavorable reserve development of $52.8 million and $156.8 million during the first nine months of 2022 and 2021, respectively, which is reflected as “incurred related to prior years” in the table above.

Year-to-date September 30, 2022

•The unfavorable prior year reserve development included approximately $45 million attributable to accident year 2021 and $29 million to 2019 and prior accident years, partially offset by $21 million favorable development attributable to accident year 2020.

•Our personal auto products incurred about $28 million of favorable loss and loss adjustment expense (LAE) reserve development, with about $25 million attributable to the Direct business. The favorable development was primarily attributable to more subrogation and salvage recoveries and lower loss adjustment expenses than originally anticipated, partially offset by higher than anticipated severity and frequency of auto property damage payments on previously closed claims and late reported injury claims.

•Our Commercial Lines business experienced about $77 million of unfavorable development, primarily due to higher than anticipated severity of injury case reserves and higher than anticipated severity and frequency of late reported claims in our transportation network company business.

•Our Property business experienced minimal unfavorable prior accident year development, which was almost completely offset by minimal favorable development in our special lines products.

Year-to-date September 30, 2021

•The unfavorable prior year reserve development included $109 million attributable to accident year 2019 and $113 million to 2018 and prior accident years, partially offset by favorable development attributable to accident year 2020.

•Our personal auto products incurred $48 million of unfavorable loss and LAE reserve development, with about $44 million attributable to the Agency business. The unfavorable development was primarily attributable to a higher than anticipated frequency of reopened personal injury protection claims, primarily in Florida, and higher than anticipated bodily injury severity, partially offset by less late reported claims than anticipated for accident year 2020 and lower adjusting expenses than anticipated.

•Our Commercial Lines business experienced $91 million of unfavorable development, primarily due to increased injury severity and the emergence of large injury claims, at rates higher than originally anticipated, primarily in Texas and Florida.

•Our Property business experienced $31 million of unfavorable development, primarily due to higher than anticipated severity and reopened claims activity in Florida.

•Our special lines products experienced about $12 million of favorable development.

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Note 7 Supplemental Cash Flow Information — Cash and cash equivalents include bank demand deposits and daily overnight reverse repurchase commitments of funds held in bank demand deposit accounts by certain subsidiaries. The amount of reverse repurchase commitments, which are not considered part of the investment portfolio, held by these subsidiaries at September 30, 2022 and 2021, and December 31, 2021, were $123.0 million, $134.6 million, and $137.1 million, respectively.

Restricted cash and cash equivalents include collateral held against unpaid deductibles and cash that is restricted to pay flood claims under the National Flood Insurance Program’s “Write Your Own” program, for which certain subsidiaries are administrators.

Non-cash activity included the following in the respective periods:

	Nine Months Ended September 30,
(millions)	2022		2021
Common share dividends1	$	58.5	$	58.5
Operating lease liabilities2	29.7		79.5

1 Declared but unpaid. See Note 9 – Dividends for further discussion.

2 From obtaining right-of-use assets.

We paid the following in the respective periods: 

	Nine Months Ended September 30,
(millions)	2022		2021
Income taxes	$	595.9	$	669.5
Interest	191.3		186.3
Operating lease liabilities	62.5		67.8

Note 8 Segment Information — Our Personal Lines segment writes insurance for personal autos and recreational vehicles (our special lines products). Our Commercial Lines segment writes auto-related liability and physical damage insurance, workers’ compensation insurance primarily for the transportation industry, and business-related general liability and property insurance, predominately for small businesses. Our Property segment writes residential property insurance for homeowners, other property owners, and renters. Our service businesses provide insurance-related services, including processing Commercial Automobile Insurance Procedures/Plans (CAIP) business and serving as an agent for homeowners, general liability, and workers’ compensation insurance, among other products, through programs in our direct Personal Lines and Commercial Lines businesses. As previously discussed in our Annual Report on Form 10-K for the year ended December 31, 2021, during the third quarter 2022, our CAIP service contract expired and we did not renew the contract. This non-renewal will not materially affect our financial condition, results of operations, or cash flows. All segment revenues are generated from external customers; all intercompany transactions are eliminated in consolidation.

25

Following are the operating results for the respective periods:

	Three Months Ended September 30,								Nine Months Ended September 30,
	2022				2021				2022				2021
(millions)	Revenues		Pretax Profit (Loss)		Revenues		Pretax Profit (Loss)		Revenues		Pretax Profit (Loss)		Revenues		Pretax Profit (Loss)
Personal Lines
Agency	$	4,441.9	$	(41.3)	$	4,267.9	$	41.0	$	13,131.7	$	507.6	$	12,586.4	$	796.0
Direct	5,077.4		40.6		4,690.2		(62.4)		14,776.9		389.4		13,755.8		480.6
Total Personal Lines1	9,519.3		(0.7)		8,958.1		(21.4)		27,908.6		897.0		26,342.2		1,276.6
Commercial Lines	2,317.9		238.1		1,877.4		197.5		6,749.5		683.5		4,917.0		556.1
Property2	561.0		(141.0)		526.5		(222.7)		1,689.6		(289.6)		1,501.3		(376.7)
Other indemnity3	0.7		(2.1)		2.8		(0.3)		2.0		(9.3)		6.8		(0.2)
Total underwriting operations	12,398.9		94.3		11,364.8		(46.9)		36,349.7		1,281.6		32,767.3		1,455.8
Fees and other revenues4	181.4		NA		174.9		NA		531.9		NA		516.8		NA
Service businesses	82.7		(0.1)		73.8		1.0		230.5		9.0		202.1		12.1
Investments5	117.2		111.4		245.7		239.1		(971.2)		(988.6)		1,723.7		1,705.2
Interest expense	NA		(63.1)		NA		(54.2)		NA		(180.4)		NA		(167.0)
Property - Goodwill impairment2	NA		0		NA		0		NA		(224.8)		NA		0
Consolidated total	$	12,780.2	$	142.5	$	11,859.2	$	139.0	$	36,140.9	$	(103.2)	$	35,209.9	$	3,006.1

NA = Not applicable

1 Personal auto products accounted for 94% of the total Personal Lines segment net premiums earned during the three and nine months ended September 30, 2022 and 2021; our special lines products (e.g., motorcycles, ATVs, RVs, watercraft, and snowmobiles) accounted for the balance of the Personal Lines net premiums earned.

2 The total pretax loss, including goodwill impairment, for the Property segment was $514.4 million for the nine months ended September 30, 2022. For the three and nine months ended September 30, 2022, pretax profit (loss) also included $5.0 million and $24.1 million, respectively, of amortization expense associated with acquisition-related intangible assets attributable to our Property segment, and $14.2 million and $42.5 million for the same periods in 2021.

See Note 12 – Goodwill and Intangible Assets for further discussion.

3 Primarily includes run-off business operations.

4 Pretax profit (loss) for fees and other revenues is allocated to operating segments.

5 Revenues represent recurring investment income and total net realized gains (losses) on securities; pretax profit (loss) is net of investment expense.

Our management uses underwriting margin and combined ratio as primary measures of underwriting profitability. The underwriting margin is the pretax underwriting profit (loss) expressed as a percentage of net premiums earned (i.e., revenues from underwriting operations). Pretax underwriting profit (loss) is calculated as net premiums earned plus fees and other revenues, less: (i) losses and loss adjustment expenses; (ii) policy acquisition costs; and (iii) other underwriting expenses. Combined ratio is the complement of the underwriting margin. Following are the underwriting margins and combined ratios for our underwriting operations for the respective periods:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2022			2021			2022			2021
	Under-writing Margin		Combined Ratio	Under-writing Margin		Combined Ratio	Under-writing Margin		Combined Ratio	Under-writing Margin		Combined Ratio
Personal Lines
Agency	(0.9)	%	100.9	1.0	%	99.0	3.9	%	96.1	6.3	%	93.7
Direct	0.8		99.2	(1.3)		101.3	2.6		97.4	3.5		96.5
Total Personal Lines	0		100.0	(0.2)		100.2	3.2		96.8	4.9		95.1
Commercial Lines	10.3		89.7	10.5		89.5	10.1		89.9	11.3		88.7
Property1	(25.1)		125.1	(42.3)		142.3	(17.1)		117.1	(25.1)		125.1
Total underwriting operations	0.8		99.2	(0.4)		100.4	3.5		96.5	4.4		95.6

1 Included in the three and nine months ended September 30, 2022, is 0.9 points and 1.4 points, respectively, of amortization expense associated with intangible assets and 2.7 points and 2.8 points, respectively, for the same periods in 2021.

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Note 9 Dividends — Following is a summary of our common and preferred share dividends that were declared and/or paid during the nine months ended September 30, 2022 and 2021:

(millions, except per share amounts)		Amount
Declared	Payable	Per Share		Accrued/Paid1
Common - Quarterly Dividends:
August 2022	October 2022	$	0.10	$	58.5
May 2022	July 2022	0.10		58.5
March 2022	April 2022	0.10		58.5
December 2021	January 2022	0.10		58.5
August 2021	October 2021	0.10		58.5
May 2021	July 2021	0.10		58.5
March 2021	April 2021	0.10		58.5
December 2020	January 2021	0.10		58.6
Common - Annual Variable Dividends:
December 2020	January 2021	4.50		2,635.9
Preferred Dividends:
August 2022	September 2022	26.875		13.4
December 2021	March 2022	26.875		13.4
August 2021	September 2021	26.875		13.4
December 2020	March 2021	26.875		13.4

1 The common share dividend accrual is based on an estimate of common shares outstanding as of the record date and all accruals are recorded as a part of accounts payable, accrued expenses, and other liabilities on the consolidated balance sheets until paid.

See Note 14 – Dividends in our 2021 Annual Report to Shareholders for a discussion of our quarterly and annual common share dividends and our preferred share dividend policies, including a discussion of the $1.50 per common share, or $876.5 million in the aggregate, 2021 annual variable common share dividend that was declared and paid in the fourth quarter 2021.

Note 10 Other Comprehensive Income (Loss) — The components of other comprehensive income (loss), including reclassification adjustments by income statement line item, were as follows: 

							Components of Changes in Accumulated Other Comprehensive Income (after tax)
(millions)	Pretax total accumulated other comprehensive income (loss)		Total tax (provision) benefit		After tax total accumulated other comprehensive income (loss)		Total net unrealized gains  (losses) on securities		Net unrealized losses on forecasted transactions		Foreign currency translation adjustment
Balance at June 30, 2022	$	(2,795.5)	$	586.5	$	(2,209.0)	$	(2,193.5)	$	(14.7)	$	(0.8)
Other comprehensive income (loss) before reclassifications:
Investment securities	(1,223.3)		256.9		(966.4)		(966.4)		0		0
Foreign currency translation adjustment	(0.9)		0.2		(0.7)		0		0		(0.7)
Total other comprehensive income (loss) before reclassifications	(1,224.2)		257.1		(967.1)		(966.4)		0		(0.7)
Less: Reclassification adjustment for amounts realized in net income by income statement line item:
Net realized gains (losses) on securities	(58.4)		12.3		(46.1)		(46.1)		0		0
Interest expense	(0.2)		0.1		(0.1)		0		(0.1)		0
Total reclassification adjustment for amounts realized in net income	(58.6)		12.4		(46.2)		(46.1)		(0.1)		0
Total other comprehensive income (loss)	(1,165.6)		244.7		(920.9)		(920.3)		0.1		(0.7)
Balance at September 30, 2022	$	(3,961.1)	$	831.2	$	(3,129.9)	$	(3,113.8)	$	(14.6)	$	(1.5)

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							Components of Changes in Accumulated Other Comprehensive Income (after tax)
(millions)	Pretax total accumulated other comprehensive income (loss)		Total tax (provision) benefit		After tax total accumulated other comprehensive income (loss)		Total net unrealized gains  (losses) on securities		Net unrealized losses on forecasted transactions		Foreign currency translation adjustment
Balance at June 30, 2021	$	619.6	$	(136.4)	$	483.2	$	498.8	$	(15.1)	$	(0.5)
Other comprehensive income (loss) before reclassifications:
Investment securities	(117.9)		24.8		(93.1)		(93.1)		0		0
Foreign currency translation adjustment	(0.3)		0.1		(0.2)		0		0		(0.2)
Total other comprehensive income (loss) before reclassifications	(118.2)		24.9		(93.3)		(93.1)		0		(0.2)
Less: Reclassification adjustment for amounts realized in net income by income statement line item:
Net realized gains (losses) on securities	46.4		(9.7)		36.7		36.7		0		0
Interest expense	(0.2)		0.1		(0.1)		0		(0.1)		0
Total reclassification adjustment for amounts realized in net income	46.2		(9.6)		36.6		36.7		(0.1)		0
Total other comprehensive income (loss)	(164.4)		34.5		(129.9)		(129.8)		0.1		(0.2)
Balance at September 30, 2021	$	455.2	$	(101.9)	$	353.3	$	369.0	$	(15.0)	$	(0.7)
							Components of Changes in Accumulated Other Comprehensive Income (after tax)
(millions)	Pretax total accumulated other comprehensive income (loss)		Total tax (provision) benefit		After tax total accumulated other comprehensive income (loss)		Total net unrealized gains  (losses) on securities		Net unrealized losses on forecasted transactions		Foreign currency translation adjustment
Balance at December 31, 2021	$	52.3	$	(11.6)	$	40.7	$	56.2	$	(14.9)	$	(0.6)
Other comprehensive income (loss) before reclassifications:
Investment securities	(4,321.7)		907.6		(3,414.1)		(3,414.1)		0		0
Foreign currency translation adjustment	(1.1)		0.2		(0.9)		0		0		(0.9)
Total other comprehensive income (loss) before reclassifications	(4,322.8)		907.8		(3,415.0)		(3,414.1)		0		(0.9)
Less: Reclassification adjustment for amounts realized in net income by income statement line item:
Net realized gains (losses) on securities	(309.0)		64.9		(244.1)		(244.1)		0		0
Interest expense	(0.4)		0.1		(0.3)		0		(0.3)		0
Total reclassification adjustment for amounts realized in net income	(309.4)		65.0		(244.4)		(244.1)		(0.3)		0
Total other comprehensive income (loss)	(4,013.4)		842.8		(3,170.6)		(3,170.0)		0.3		(0.9)
Balance at September 30, 2022	$	(3,961.1)	$	831.2	$	(3,129.9)	$	(3,113.8)	$	(14.6)	$	(1.5)

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							Components of Changes in Accumulated Other Comprehensive Income (after tax)
(millions)	Pretax total accumulated other comprehensive income (loss)		Total tax (provision) benefit		After tax total accumulated other comprehensive income (loss)		Total net unrealized gains  (losses) on securities		Net unrealized losses on forecasted transactions		Foreign currency translation adjustment
Balance at December 31, 2020	$	1,187.4	$	(255.7)	$	931.7	$	947.3	$	(15.6)	$	0
Other comprehensive income (loss) before reclassifications:
Investment securities	(494.6)		103.9		(390.7)		(390.7)		0		0
Foreign currency translation adjustment	(0.9)		0.2		(0.7)		0		0		(0.7)
Total other comprehensive income (loss) before reclassifications	(495.5)		104.1		(391.4)		(390.7)		0		(0.7)
Less: Reclassification adjustment for amounts realized in net income by income statement line item:
Net realized gains (losses) on securities	237.5		(49.9)		187.6		187.6		0		0
Interest expense	(0.8)		0.2		(0.6)		0		(0.6)		0
Total reclassification adjustment for amounts realized in net income	236.7		(49.7)		187.0		187.6		(0.6)		0
Total other comprehensive income (loss)	(732.2)		153.8		(578.4)		(578.3)		0.6		(0.7)
Balance at September 30, 2021	$	455.2	$	(101.9)	$	353.3	$	369.0	$	(15.0)	$	(0.7)

In an effort to manage interest rate risk, we entered into forecasted transactions on certain of Progressive’s debt issuances. We expect to reclassify $0.5 million (pretax) into interest expense during the next 12 months, related to net unrealized losses on these forecasted transactions (see Note 4 – Debt in our 2021 Annual Report to Shareholders for further discussion).

Note 11 Litigation — The Progressive Corporation and/or its insurance subsidiaries are named as defendants in various lawsuits arising out of claims made under insurance policies written by our insurance subsidiaries in the ordinary course of business. We consider all legal actions relating to such claims in establishing our loss and loss adjustment expense reserves.

In addition, The Progressive Corporation and/or its subsidiaries are named as defendants in a number of class action or individual lawsuits that challenge certain of the operations of the subsidiaries. These cases include and/or typically have included those alleging damages as a result of, among other things: our subsidiaries’ methods used for evaluating and paying medical or injury claims or benefits, including, but not limited to, certain bodily injury, personal injury protection, uninsured motorist/underinsured motorist (UM/UIM), and medical payment claims and for reimbursing medical costs incurred by Medicare/Medicaid beneficiaries; other claims handling procedures, including, but not limited to, challenges relating to our network of repair facilities, our methods used for estimating physical damage to vehicles for repair purposes and for evaluating the actual cash value of total loss vehicles, our payment of fees and taxes, our subrogation practices, our salvage practices, and our handling of diminution of value claims; homeowner claims handling practices and procedures; our assessment of fees related to insufficient funds or reversed payments; interpretations of the provisions of our insurance policies; our insurance product design; certain of our premium actions, including those in response to the COVID-19 pandemic; rating practices; certain marketing, sales, services, implementation and renewal practices and procedures, including with respect to accessibility; our usage-based insurance program; certain relationships with independent insurance agents; patent matters; alleged violation of the Telephone Consumer Protection Act; commercial disputes, including breach of contract; and certain employment practices, including claims relating to pay practices and fair employment practices, among other matters. Other insurance companies face many of these same issues.

The nature and volume of litigation pending against The Progressive Corporation and/or its insurance subsidiaries is similar to that which was disclosed in Note 12 – Litigation in our 2021 Annual Report to Shareholders.

We plan to contest the pending lawsuits vigorously, but may pursue settlement negotiations in some cases, as we deem appropriate. Although outcomes of pending cases are uncertain until final disposition, we establish accruals for these lawsuits when it is probable that a loss has been or will be incurred and we can reasonably estimate potential loss exposure, which may include a range of loss. As to lawsuits for which the loss is considered neither probable nor estimable, or is considered probable but not estimable, we do not establish an accrual. Nevertheless, we continue to evaluate pending litigation to determine if any losses not deemed probable and estimable become so, at which point we would establish an accrual at our best estimate of the loss or range of loss.

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With respect to our pending lawsuits that are not related to claims under insurance policies, the accruals that we have established, if any, were not material at September 30, 2022 and 2021, or December 31, 2021, and there were no material settlements during 2021 or the first nine months of 2022. For most of these lawsuits, we do not consider any losses to be both probable and estimable, and we are unable to estimate a meaningful range of loss, if any, at this time, due to the factors discussed in Note 12 – Litigation in our 2021 Annual Report to Shareholders. In the event that any one or more of these lawsuits results in a substantial judgment against us, or settlement by us, or if our accruals (if any) prove to be inadequate by a significant amount, the resulting liability could have a material adverse effect on our consolidated financial condition, cash flows, and/or results of operations. For a further discussion on our pending litigation and related reserving policies, see Note 12 – Litigation in our 2021 Annual Report to Shareholders.

Note 12 Goodwill and Intangible Assets

Goodwill

The majority of the goodwill recorded as of September 30, 2022 and 2021, and December 31, 2021, related to the April 1, 2015, acquisition of a controlling interest in ARX. In the second quarter 2022, we performed an interim impairment test of our goodwill allocated to the ARX reporting unit and recorded an impairment loss of $224.8 million, which is disclosed as a separate line item in our consolidated statements of comprehensive income. The impairment loss was fully allocated to our Property segment. There were no previously recorded goodwill impairment losses on any of the outstanding goodwill.

The indicators of impairment primarily related to the magnitude of recent weather events relative to forecasted expectations, as well as other factors impacting our plans to restore our Property business to target profitability in a timely fashion and the subsequent reduced forecasted profitability of ARX.

The quantitative goodwill impairment assessment consisted of comparing the fair value of the reporting unit to its carrying value. To determine the fair value of a reporting unit, we use a discounted cash flow model. The model uses assumptions including, but not limited to, discount rate, forecasted growth, profitability, investment return, and capital requirements. The assumptions and estimates were consistent with those we believe other non-related marketplace participants would use and were based on management’s best estimates at the time of the analysis. The calculated fair value of the ARX reporting unit was below its carrying value at June 30, 2022, which resulted in recording the goodwill impairment. There was no indication of impairment on the remaining $227.9 million goodwill, of which 98% was attributable to our Personal Lines Agency business and related to the ARX acquisition.

Intangible Assets

The following table is a summary of the net carrying amount of other intangible assets:

(millions)	September 30, 2022		September 30, 2021		December 31, 2021
Intangible assets subject to amortization	$	79.4	$	119.5	$	104.9
Indefinite-lived intangible assets1	12.4		12.4		12.4
Total	$	91.8	$	131.9	$	117.3

1 Indefinite-lived intangible assets are comprised of state insurance and agent licenses. State insurance licenses were previously subject to amortization under superseded accounting guidance and have $0.6 million of accumulated amortization for all periods presented.

Intangible assets subject to amortization consisted of the following:

(millions)	September 30, 2022						September 30, 2021						December 31, 2021
Category	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Policies in force	$	0	$	0	$	0	$	256.2	$	237.9	$	18.3	$	256.2	$	247.1	$	9.1
Agency relationships	159.2		85.3		73.9		159.2		73.9		85.3		159.2		76.8		82.4
Software rights	69.1		64.8		4.3		69.1		56.2		12.9		69.1		58.3		10.8
Trade name	3.6		2.4		1.2		3.6		0.6		3.0		3.6		1.0		2.6
Total	$	231.9	$	152.5	$	79.4	$	488.1	$	368.6	$	119.5	$	488.1	$	383.2	$	104.9

Amortization expense was $5.4 million and $25.5 million for the three and nine months ended September 30, 2022, respectively, compared to $14.6 million and $43.1 million during the same periods last year. During the first quarter 2022, the policies in force intangible asset, with a gross carrying value of $256.2 million, was fully amortized.

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Note 13 New Accounting Standards — We did not adopt any new accounting standards during the nine months ended September 30, 2022. We assessed the adoption impacts of recently issued accounting standards by the Financial Accounting Standards Board on our consolidated financial statements as well as material updates to previous assessments, if any, from our Annual Report on Form 10-K for the fiscal year ended December 31, 2021. There were no new material accounting standards issued in the nine months ended September 30, 2022, that are expected to impact The Progressive Corporation or its subsidiaries.

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

I. OVERVIEW

The Progressive Corporation’s insurance subsidiaries recognized growth in both premiums written and policies in force during the third quarter 2022, compared to the same period last year. For the third quarter 2022, our underwriting profit margin of 0.8% fell short of our targets in large part due to the impact from Hurricane Ian and was better than the underwriting loss margin of 0.4% recognized during the same period last year. For the third quarter 2022, our underwriting profit was $94.3 million, compared to an underwriting loss of $46.9 million for the third quarter last year. The increase in underwriting profitability contributed to the 5% increase in net income on a year-over-year basis. Our comprehensive loss for the third quarter 2022 was $785 million greater than the comprehensive loss incurred in the third quarter 2021, due to the significant decline in the market value of our fixed-maturity securities, reflecting higher interest rates and wider credit spreads over the last 12 months. Total capital (debt plus shareholders’ equity) at September 30, 2022, was $21.2 billion, which was down $2.0 billion from year-end 2021, primarily due to our $3.3 billion comprehensive loss for the first nine months of 2022, in part offset by our $1.5 billion debt issuance in the first quarter 2022.

During the third quarter, we generated $13.0 billion of net premiums written, which is an increase of $0.6 billion, or 5%, compared to third quarter 2021, primarily reflecting rate increases taken during 2021 and the first nine months of 2022. We ended the third quarter 2022 with 26.9 million companywide policies in force, which is 300,000 more policies than were in force at September 30, 2021. Personal auto policies in force decreased 1% year over year, while our Commercial Lines, special lines, and Property products grew policies 9%, 5%, and 4%, respectively. On a year-over-year basis, new personal auto applications increased for the third quarter and were down the first nine months of 2022. During the quarter, we believe targeted advertising spend and competitor rate increases spurred the new personal auto application growth, which partially offset the decreases in renewal applications during the quarter and the decreases in new auto applications experienced during the first half of 2022 that reflected rate increases and decreased advertising spend during that period.

During the third quarter 2022, we generated an underwriting profit margin of 0.8%, which was below our 4.0% underwriting target profit goal. Catastrophe losses reduced our profit margin by about seven loss ratio points for the third quarter with Hurricane Ian, which mostly impacted Florida, accounting for 86% of catastrophe losses during the period. Excluding loss adjustment expenses, we incurred $585 million of vehicle losses and $175 million of net Property losses after reflecting the catastrophe reinsurance coverage we have on our Property business. Special Lines catastrophe losses, primarily boat losses, accounted for nearly $290 million of the total vehicle losses and personal auto accounted for about $285 million. The balance of the vehicle losses from the storm were minimal and were incurred in our commercial auto products. On the Property side, we retained $25 million of allocated loss adjustment expenses. Under our excess of loss reinsurance program, our total retention for combined losses and allocated loss adjustment expenses is $200 million.

A. Insurance Operations

For the third quarter 2022, we experienced a companywide underwriting profit margin of 0.8%, compared to our target profit margin of 4% and an underwriting loss margin of 0.4% for the same period last year. Net premiums written grew 5% over the third quarter last year, reflecting rate increases that began in the second quarter of 2021 and continued through the third quarter 2022, while policies in force increased 1% on a companywide basis. The distribution of profitability and growth varied by segment during the third quarter 2022 as discussed below.

During the third quarter 2022, Commercial Lines was our only profitable operating segment, generating an underwriting profit margin of 10.3%, while our Personal Lines business broke even and our Property operating segment generated a 25.1% underwriting loss margin due to the significant losses incurred from Hurricane Ian during the quarter. Special lines products contributed about 3 points of underwriting loss to the Personal Lines results for the third quarter. In total for the third quarter, catastrophe losses were up 0.7 points on a year-over-year basis with catastrophe losses up nearly 60% in Personal Lines and down about 35% in our Property business. Our Commercial Lines business represented less than 2% of our total catastrophe losses given the nature of the business and that most commercial auto customers move their vehicles out of the path of the storms to protect their businesses. For the third quarter 2022, our personal auto incurred accident frequency was down about 9%, compared to the prior year. We continued to see inflationary pressure in the average costs to settle a claim, driven primarily by the increase in the valuation of new and used vehicles on a year-over-year basis, which led to an increase in severity of about 13% over the third quarter last year.

In the aggregate, we raised our personal auto rates during 2021 by about 8% and for the first half of 2022 by 9%. During the third quarter, in addition to raising personal auto rates about 2% in the aggregate countrywide, we shifted our focus to evaluating underwriting restrictions, bill plans, and media spend to identify growth opportunities. During the quarter, quotes increased more than 20% in both the Agent and Direct auto channels and total personal auto new business applications

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increased 20%. Our competitors continued to raise rates to address their underwriting profitability issues, which also had a positive impact on our competitive positioning and we believe contributed to our new business application growth. We currently believe that, with the exception of a few key states, the major personal auto rate increases are behind us for the remainder of 2022. However, management continues to assess new and used car prices, miles driven, driving patterns, loss severity, weather events, inflation, and other components of expected loss costs on a state-by-state basis for our personal auto business and will file for rate adjustments where deemed necessary.

We believe a key element in improving the accuracy of our rating is Snapshot®, our usage-based insurance offering. During the first nine months of 2022, the adoption rates for consumers enrolling in the program, when given the option, increased nearly 20% in Agency auto and nearly 15% in Direct auto, compared to the same period last year. Our latest model is available in states that represented about 11% of our countrywide personal auto premium. We continue to invest in our mobile application, with mobile devices being chosen for Snapshot monitoring for the majority of new enrollments.

During the third quarter 2022, we remained focused on taking rate and non-rate actions in our Property business to reduce volatility in our underwriting results, as discussed below. We increased rates in our Property businesses about 2% and 9% during the third quarter and first nine months of 2022, respectively, and 9% during the last 12 months. These targeted rate increases are continuing to be earned into the book of business.

We continue to focus our Property growth efforts in states with traditionally less catastrophe exposure and limit growth in the coastal and hail-prone states. In response to this effort, in 2021, we announced plans to non-renew about 60,000 policies in Florida, which we started doing in the second quarter 2022. This effort to non-renew Florida policies was curtailed, in part, as new legislation was introduced in Florida potentially prohibiting the non-renewal of certain policies based on the age of the roof of the insured structure. We believe there is a potential we may non-renew less of the policies than previously intended. While the extent to which the legislation will impact our intentions to non-renew policies is not fully known, we are identifying other opportunities to reduce weather-related volatility in Property underwriting results, including actively managing the new business we will write. In addition, in response to Hurricane Ian, a moratorium suspending non-renewals and cancellations of policies for nonpayment was put into place in Florida, which will also have a temporary impact on our plans to limit our growth in the coastal states until the moratorium is lifted.

We evaluate growth in terms of both net premiums written and policies in force growth. The rate and non-rate actions that began in 2021, and continued into the third quarter 2022, impacted premium and volume growth on a year-over-year basis. For the third quarter 2022, our companywide net premiums written grew 5%, with Personal Lines growing 9% and Property 3%, primarily reflecting higher average written premium per policy, on a year-over-year basis. In our Commercial Lines business, net premiums written decreased 13% during the third quarter 2022, primarily reflecting the timing of renewal events for certain transportation network company (TNC) policies on a year-over-year basis and a shift in the length of the policy terms. During October 2022, we renewed certain TNC policies that were previously renewed in September 2021. During the first quarter 2022, we renewed certain TNC polices on a 12-month basis that were previously written on a 6-month basis and, therefore, had renewed in prior years during the third quarter. As a result, Commercial Lines premiums written growth was positively impacted in the first quarter 2022, while the third quarter 2022 premium growth experienced an unfavorable impact. Excluding the impact of TNC, Commercial Lines net premiums written grew 2% during the third quarter 2022 and 16% year to date, compared to the prior year. The lower growth during the third quarter relative to the year-to-date growth primarily reflected a decrease in our for-hire transportation business market target due to less demand for the product than last year, driven by the general weakening of the economy.

On a companywide basis, as of September 30, 2022, policies in force grew 1%, with Commercial Lines and Property growing 9% and 4%, respectively, compared to the prior year, and very minimal growth in our Personal Lines business. Within Personal Lines, policies in force decreased 5% in Agency auto, increased 2% in Direct auto, and increased 5% in special lines on a year-over-year basis. The overall decrease in our personal auto policy in force growth is attributable to the decrease in the growth of new applications during the nine months ended September 30, 2022, compared to the prior year, and a decline in renewal applications during the third quarter 2022.

During the third quarter 2022, on a year-over-year basis, average written premiums grew 10% in personal auto, 8% in commercial auto [excluding our TNC, business owners policy (BOP), and Protective Insurance Corporation and subsidiaries (Protective Insurance) products], and 5% in Property, reflecting rate increases taken beginning in 2021 and continuing into 2022, in response to rising loss costs. Growth may continue to be impacted by the actions we are taking to address profitability and volatility in our results. Given that our Property policies are 12-month terms, compared to primarily 6-month policies in our personal auto business, these rate actions take longer to earn in.

During the third quarter 2022, new applications (i.e., issued policies) increased 16% in our Personal Lines segment, with total new personal auto applications increasing 20%. Agency auto new applications increased 9% and Direct auto increased 26%, as

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we continued to experience improvement in new business auto applications, as our competitors continued to raise rates and we re-evaluated our media spend to identify growth opportunities. Despite the strong new application growth during the quarter, our personal auto new applications are still down in both the Agency and Direct channels for the first nine months of 2022, compared to the same period last year. New applications for our special lines products were flat during the third quarter 2022, primarily reflecting the significant new application growth experienced during 2021, due to growth in RV, boat, and motorcycle demand. On a year-over-year basis for the third quarter 2022, renewal applications decreased 2% in Personal Lines, with total personal auto renewal applications down 3% over the third quarter last year, primarily due to rate increases taken beginning in 2021.

For the third quarter 2022, our Commercial Lines business (excluding our TNC, BOP, and Protective Insurance products) new applications decreased 6% and renewal applications increased 10%, on a year-over-year basis. The decrease during the quarter was primarily driven by a decreased demand in our for-hire transportation product, as the transportation freight market softened, and the significant new application growth experienced during 2021. We have observed declining trends in several macroeconomic factors that could impact our business, with home sales, freight tonnage, and aggregate deliveries all experiencing a decrease in activity compared to the prior year. We will continue to monitor these and other economic factors. On a year-over-year basis, new applications in our Property business decreased 9% and renewal applications increased 7% for the third quarter.

While we remain focused on growth, we strongly believe that achieving our target profit margin takes precedence over growing premiums. We realize that to grow policies in force, it is critical that we retain our customers for longer periods. Consequently, increasing retention continues to be one of our most important priorities. Our efforts to increase our share of multi-product households remains a key initiative and we will continue to make investments to improve the customer experience in order to support that goal. Policy life expectancy, which is our actuarial estimate of the average length of time that a policy will remain in force before cancellation or lapse in coverage, is our primary measure of customer retention in our Personal Lines, Commercial Lines, and Property businesses.

We evaluate total auto retention using a trailing 12-month and a trailing 3-month policy life expectancy. The latter can reflect more volatility and is more sensitive to seasonality. As of the end of the third quarter 2022, our trailing 12-month total personal auto policy life expectancy decreased 21%, compared to last year, with the Agency channel down 23% and the Direct channel down 18%, respectively. Our trailing 3-month policy life expectancy for total personal auto was down 30% compared to the same period last year. We believe that the decreases in policy life expectancy primarily reflect the impact of the rate actions we have taken, beginning in the second quarter 2021. Our special lines trailing 12-month policy life expectancy increased 4%, year over year, while Commercial Lines and Property both decreased 9%, primarily due to a decrease in for-hire transportation business market target demand and rate increases taken in 2021 and 2022, respectively.

B. Investments

The fair value of our investment portfolio was $52.3 billion at September 30, 2022, compared to $51.5 billion at December 31, 2021. Declines in valuations of our portfolio nearly offset the increase in invested assets generated from the cash flows from our underwriting operations and the proceeds of the $1.5 billion debt offering in March.

Our asset allocation strategy is to maintain 0%-25% of our portfolio in Group I securities, with the balance (75%-100%) of our portfolio in Group II securities (the securities allocated to Group I and II are defined below under Results of Operations – Investments). At September 30, 2022, 10% of our portfolio was allocated to Group I securities and 90% to Group II securities, compared to 17% and 83%, respectively, at December 31, 2021. The decrease in the percentage of Group I securities since year end was primarily driven by sales in our common equity portfolio and, to a lesser extent, high-yield bonds and preferred stocks with proceeds reinvested in Group II short-term investments.

Our recurring investment income generated a pretax book yield of 2.5% for the third quarter 2022, compared to 1.8% for the same period in 2021, due to the increase in interest rates on our floating-rate securities and the investment of cash and maturities at relatively higher interest rates. Our investment portfolio produced a fully taxable equivalent (FTE) total return of (1.9)% and 0.2% for the third quarter 2022 and 2021, respectively. Our fixed-income and common stock portfolios had FTE total returns of (1.8)% and (4.5)%, respectively, for the third quarter 2022, compared to 0.2% and 0.2%, respectively, last year. The decrease in the fixed-income return reflected the market impact of higher interest rates and wider credit spreads during the last twelve months. The common stock return decline reflected general market conditions.

At September 30, 2022, the fixed-income portfolio had a weighted average credit quality of AA and a duration of 2.7 years, compared to AA- and 3.0 years at both September 30, 2021 and December 31, 2021. We have shortened our portfolio duration during the first nine months of 2022, which we believe provides some protection against further increases in interest rates.

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II. FINANCIAL CONDITION

A. Liquidity and Capital Resources

Progressive’s insurance operations create liquidity by collecting and investing premiums from new and renewal business in advance of paying claims. As primarily an auto insurer, our claims liabilities generally have a short-term duration. Operations generated positive cash flows of $5.9 billion and $7.3 billion for the nine months ended September 30, 2022 and 2021, respectively. While we continued to collect premiums at a faster rate than losses were paid, the decrease in operating cash flow for the nine months ended September 30, 2022, is primarily driven by higher paid losses as the costs of losses continue to rise, compared to last year. We expect cash flows to remain positive in the reasonably foreseeable future and do not expect we will have a need to raise capital to support our operations in that timeframe, although changes in market or regulatory conditions affecting the insurance industry, or other unforeseen events, may necessitate otherwise.

Our total capital (debt plus shareholders’ equity) was $21.2 billion, at book value, at September 30, 2022, compared to $23.5 billion at September 30, 2021, and $23.1 billion at December 31, 2021. The decrease from the prior periods primarily reflected the comprehensive losses recognized over the last nine months and trailing 12-months, driven by the negative market impact on the valuation of our investment portfolio, in part offset by the issuance in March 2022 of $500 million of 2.50% Senior Notes due 2027, $500 million of 3.00% Senior Notes due 2032, and $500 million of 3.70% Senior Notes due 2052. Our debt-to-total capital ratio was 30.2% at September 30, 2022, 20.9% at September 30, 2021, and 21.2% at December 31, 2021. While our financial policies include a goal of maintaining debt below 30% of total capital at book value, which we did not meet at the end of the third quarter 2022, we recognize that various factors, including rising interest rates, widening credits spreads, declines in the equity markets, or erosion in operating results, may result in that ratio exceeding 30% at times. As we have previously stated, in such a situation we may choose to remain above 30% for some time, dependent upon market conditions and the capital needs of our operating businesses. Accordingly, we do not currently anticipate taking specific actions to address this variance. We will continue to monitor this ratio, market conditions, and our capital needs going forward.

None of the covenants on our outstanding debt securities include rating or credit triggers that would require an adjustment of interest rates or an acceleration of principal payments in the event that our debt securities are downgraded by a rating agency. In April 2022, we renewed the unsecured discretionary line of credit (the “Line of Credit”) with PNC Bank, National Association, in the maximum principal amount of $250 million. We did not engage in short-term borrowings, including any borrowings under our Line of Credit, to fund our operations or for liquidity purposes during the reported periods.

During the first nine months of 2022, we returned capital to shareholders primarily through common share dividends and common share repurchases. Our Board of Directors declared a $0.10 per common share dividend in the first, second, and third quarters of 2022. These dividends, which were each $58.5 million in the aggregate per quarter, or $175.5 million on a year-to-date basis, were paid in April 2022, July 2022, and October 2022. In January 2022, we also paid common share dividends declared in the fourth quarter 2021, in the aggregate amount of $58.5 million, or $0.10 per share (see Note 9 – Dividends for further discussion). In addition to the common share dividends, in March 2022 and September 2022, we paid Series B Preferred Share dividends in the aggregate amount of $26.8 million.

Pursuant to our financial policies, we repurchase common shares to neutralize dilution from equity-based compensation granted during the year and opportunistically when we believe our shares are trading below our determination of long-term fair value. During the first nine months of 2022, we repurchased 0.7 million common shares, at a total cost of $78.6 million, including 0.4 million shares in the third quarter 2022, either in the open market or to satisfy tax withholding obligations in connection with the vesting of equity awards under our equity compensation plans. We will continue to make decisions on returning capital to shareholders based on the strength of our overall capital position, the capital strength of our subsidiaries, and potential capital needs to expand our business operations.

We seek to deploy capital in a prudent manner and use multiple data sources and modeling tools to estimate the frequency, severity, and correlation of identified exposures, including, but not limited to, catastrophic and other insured losses, natural disasters, and other significant business interruptions, to estimate our potential capital needs.

Based upon our capital planning and forecasting efforts, we believe we have sufficient capital resources and cash flows from operations to support our current business, scheduled principal and interest payments on our debt, anticipated quarterly dividends on our common shares and dividends on our Series B Preferred Shares, our contractual obligations, and other expected capital requirements for the foreseeable future. At September 30, 2022, we had $4.2 billion in a consolidated, non-insurance subsidiary of the holding company that can be used to fund corporate obligations and provide additional capital to the insurance subsidiaries to fund potential future growth. During the first nine months of 2022, we did not experience a significant change in our liquidity needs. At all times measured during the first nine months of 2022 and during 2021, which at a minimum occurs at the end of each month, our total capital exceeded the sum of our regulatory capital layer plus our self-constructed extreme contingency layer, as described in Exhibit 13 to our Annual Report on Form 10-K for the year ended December 31,

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2021 (2021 Annual Report to Shareholders). As of September 30, 2022, our estimated consolidated statutory surplus was $17.2 billion.

During the first nine months of 2022, our contractual obligations and critical accounting policies have not changed materially from those discussed in our 2021 Annual Report to Shareholders. Pursuant to our critical accounting policy for goodwill, we test our goodwill balance for impairment at the reporting unit level annually as of October 1, or more frequently if indicators of impairment exist. In conjunction with the preparation of our second quarter 2022 financial results, we performed a quantitative analysis of the goodwill attributable to our Property segment based on indications that impairment might exist. Based on this analysis, we wrote down $224.8 million of goodwill during the second quarter 2022. See Note 12 – Goodwill and Intangible Assets for further discussion. During the second quarter 2022, we renewed our catastrophe excess of loss per risk reinsurance contract, which increased our noncancellable purchase obligation commitments about $160 million, bringing our total commitments related to the excess of loss contracts to $291.6 million at September 30, 2022. There have not been any other material changes in off-balance-sheet leverage, which includes purchase obligations and catastrophe excess of loss reinsurance contracts, from those discussed in our 2021 Annual Report to Shareholders.

III. RESULTS OF OPERATIONS – UNDERWRITING

A. Segment Overview

We report our underwriting operations in three segments: Personal Lines, Commercial Lines, and Property. As a component of our Personal Lines segment, we report our Agency and Direct business results to provide further understanding of our products by distribution channel.

The following table shows the composition of our companywide net premiums written, by segment, for the respective periods:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
Personal Lines
Agency	36	%	36	%	35	%	37	%
Direct	43		40		41		41
Total Personal Lines1	79		76		76		78
Commercial Lines	16		19		19		17
Property	5		5		5		5
Total underwriting operations	100	%	100	%	100	%	100	%

1 Personal auto products accounted for 93% of the total Personal Lines segment net premiums written during the three and nine months ended September 30, 2022 and 2021, and our special lines products accounted for the balance.

Our Personal Lines business writes insurance for personal autos and special lines products (e.g., motorcycles, watercraft, and RVs). Within Personal Lines, we often refer to our four consumer segments, which include:

•Sam - inconsistently insured;

•Diane - consistently insured and maybe a renter;

•Wrights - homeowners who do not bundle auto and home; and

•Robinsons - homeowners who bundle auto and home.

While our personal auto policies are primarily written for 6-month terms, we write 12-month auto policies in our Platinum agencies to promote bundled auto and home growth. At September 30, 2022, 14% of our Agency auto policies in force were 12-month policies, compared to 13% a year earlier. While the shift to 12-month policies is slow, to the extent our Agency application mix of annual policies grows, that shift in policy term could increase our written premium mix by channel as 12-month policies have about twice the amount of net premiums written compared to 6-month policies. Our special lines products are written for 12-month terms.

Our Commercial Lines business writes auto-related liability and physical damage insurance, workers’ compensation insurance primarily for the transportation industry, and business-related general liability and property insurance, predominately for small businesses. The majority of our Commercial Lines business is written through the independent agency channel, although we continue to focus on growing our direct business. To serve our direct channel customers, we continue to expand our product offerings, including adding states where we offer BOP and include the product on our digital platform serving direct small business consumers (BusinessQuote Explorer®). The direct commercial auto business, excluding our TNC business, represented

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10% of our commercial auto premiums, for both the third quarter 2022 and 2021. We write about 90% of Commercial Lines policies for 12-month terms.

Our Property business writes residential property insurance for homeowners, other property owners, and renters. We write the majority of our Property business through the independent agency channel; however, we continue to expand the distribution of our Property product offerings in the direct channel, which represented 27% of premiums written for the third quarter 2022, compared to 24% for the same period last year. Property policies are written for 12-month terms.

B. Profitability

Profitability for our underwriting operations is defined by pretax underwriting profit or loss, which is calculated as net premiums earned plus fees and other revenues less losses and loss adjustment expenses, policy acquisition costs, and other underwriting expenses. We also use underwriting margin, which is underwriting profit or loss expressed as a percentage of net premiums earned, to analyze our results. For the respective periods, our underwriting profitability was as follows:

	Three Months Ended September 30,								Nine Months Ended September 30,
	2022				2021				2022				2021
	Underwriting Profit (Loss)				Underwriting Profit (Loss)				Underwriting Profit (Loss)				Underwriting Profit (Loss)
($ in millions)	$		Margin		$		Margin		$		Margin		$		Margin
Personal Lines
Agency	$	(41.3)	(0.9)	%	$	41.0	1.0	%	$	507.6	3.9	%	$	796.0	6.3	%
Direct	40.6		0.8		(62.4)		(1.3)		389.4		2.6		480.6		3.5
Total Personal Lines	(0.7)		0		(21.4)		(0.2)		897.0		3.2		1,276.6		4.9
Commercial Lines	238.1		10.3		197.5		10.5		683.5		10.1		556.1		11.3
Property1	(141.0)		(25.1)		(222.7)		(42.3)		(289.6)		(17.1)		(376.7)		(25.1)
Other indemnity2	(2.1)		NM		(0.3)		NM		(9.3)		NM		(0.2)		NM
Total underwriting operations	$	94.3	0.8	%	$	(46.9)	(0.4)	%	$	1,281.6	3.5	%	$	1,455.8	4.4	%

1 For the three and nine months ended September 30, 2022, underwriting profit (loss) includes $5.0 million and $24.1 million, respectively, of amortization expense associated with acquisition-related intangible assets attributable to our Property segment, compared to $14.2 million and $42.5 million for the respective periods last year. The year-over-year decreases in amortization expense reflects intangible assets that were fully amortized during the first quarter 2022.

2 Underwriting margins for our other indemnity business are not meaningful (NM) due to the low level of premiums earned by, and the variability of loss costs in, such business.

For the three months ended September 30, 2022 and 2021, the pretax underwriting profit (loss) reflects the significant amount of catastrophe losses incurred. During the third quarter 2022, our Personal Lines business recognized about $570 million of losses related to Hurricane Ian and our Property business retained $200 million of losses and allocated loss adjustment expenses. About 50% of the Personal Lines catastrophe losses from Hurricane Ian were incurred on our special lines products, mainly boats. Since the majority of our boat policies are written through independent agents, the Agency Personal Lines channel recognized an underwriting loss during the quarter, compared to an underwriting profit in the Direct channel. During the third quarter 2021, the Direct channel was more significantly impacted by the personal auto catastrophe losses that we incurred, mainly from Hurricane Ida.

We have taken significant rate increases since the first quarter of 2021 and through the third quarter 2022. In spite of the rate increases, on a year-over-year basis for the first nine months of 2022, our underwriting profitability decreased, primarily driven by higher accident severity and catastrophe losses.

See the Losses and Loss Adjustment Expenses (LAE) section below for further discussion of our frequency and severity trends and catastrophe losses incurred during the periods.

The COVID-19 pandemic has shifted consumer behavior and impacted general economic conditions. We have seen volatility in our severity trends as inflation continued to influence higher vehicle prices and costs to repair vehicles. We have responded, and will continue to respond when necessary, to these market changes through rate increases, underwriting restrictions, and other non-rate actions.

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Further underwriting results for our Personal Lines business, including results by distribution channel, the Commercial Lines business, the Property business, and our underwriting operations in total, were as follows:

	Three Months Ended September 30,			Nine Months Ended September 30,
Underwriting Performance1	2022	2021	Change	2022	2021	Change
Personal Lines – Agency
Loss & loss adjustment expense ratio	82.9	80.9	2.0	78.5	75.2	3.3
Underwriting expense ratio	18.0	18.1	(0.1)	17.6	18.5	(0.9)
Combined ratio	100.9	99.0	1.9	96.1	93.7	2.4
Personal Lines – Direct
Loss & loss adjustment expense ratio	81.4	82.7	(1.3)	78.9	76.2	2.7
Underwriting expense ratio	17.8	18.6	(0.8)	18.5	20.3	(1.8)
Combined ratio	99.2	101.3	(2.1)	97.4	96.5	0.9
Total Personal Lines
Loss & loss adjustment expense ratio	82.1	81.8	0.3	78.7	75.7	3.0
Underwriting expense ratio	17.9	18.4	(0.5)	18.1	19.4	(1.3)
Combined ratio	100.0	100.2	(0.2)	96.8	95.1	1.7
Commercial Lines
Loss & loss adjustment expense ratio	70.5	70.2	0.3	70.6	68.8	1.8
Underwriting expense ratio	19.2	19.3	(0.1)	19.3	19.9	(0.6)
Combined ratio	89.7	89.5	0.2	89.9	88.7	1.2
Property
Loss & loss adjustment expense ratio	97.2	113.9	(16.7)	89.9	95.9	(6.0)
Underwriting expense ratio2	27.9	28.4	(0.5)	27.2	29.2	(2.0)
Combined ratio2	125.1	142.3	(17.2)	117.1	125.1	(8.0)
Total Underwriting Operations
Loss & loss adjustment expense ratio	80.6	81.4	(0.8)	77.7	75.6	2.1
Underwriting expense ratio	18.6	19.0	(0.4)	18.8	20.0	(1.2)
Combined ratio	99.2	100.4	(1.2)	96.5	95.6	0.9
Accident year – Loss & loss adjustment expense ratio3	81.3	81.8	(0.5)	77.6	75.1	2.5

1 Ratios are expressed as a percentage of net premiums earned. The portion of fees and other revenues related to our loss adjustment activities are netted against loss adjustment expenses and the portion of fees and other revenues related to our underwriting operations are netted against underwriting expenses in the ratio calculations.

2 Included in the three and nine months ended September 30, 2022, are 0.9 points and 1.4 points, respectively, of amortization expense on acquisition-related intangible assets attributable to our Property segment, and 2.7 points and 2.8 points for the respective periods last year. Excluding this expense, for the three months ended September 30, 2022 and 2021, the Property business would have reported expense ratios of 27.0 and 25.7, respectively, and combined ratios of 124.2 and 139.6, respectively. For the nine months ended September 30, 2022 and 2021, excluding this expense, the Property business would have reported expense ratios of 25.8 and 26.4, respectively, and combined ratios of 115.7 and 122.3, respectively.

3 The accident year ratios include only the losses that occurred during the period noted. As a result, accident period results will change over time, either favorably or unfavorably, as we revise our estimates of loss costs when payments are made or reserves for that accident period are reviewed.

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Losses and Loss Adjustment Expenses (LAE)

	Three Months Ended September 30,				Nine Months Ended September 30,
(millions)	2022		2021		2022		2021
Change in net loss and LAE reserves	$	1,470.4	$	1,673.1	$	3,167.3	$	3,903.7
Paid losses and LAE	8,548.3		7,577.6		25,130.9		20,863.9
Total incurred losses and LAE	$	10,018.7	$	9,250.7	$	28,298.2	$	24,767.6

Claims costs, our most significant expense, represent payments made and estimated future payments to be made, to or on behalf of our policyholders, including expenses needed to adjust or settle claims. Claims costs are a function of loss severity and frequency and, for our vehicle businesses, are influenced by inflation and driving patterns, among other factors, some of which are discussed below. In our Property business, severity is primarily a function of construction costs and the age of the structure. Accordingly, anticipated changes in these factors are taken into account when we establish premium rates and loss reserves. Loss reserves are estimates of future costs and our reserves are adjusted as underlying assumptions change and information develops.

Our total loss and LAE ratio decreased 0.8 points for the third quarter 2022, compared to the same period last year, and increased 2.1 points on a year-to-date basis. The decrease in the third quarter 2022, in part reflects higher earned premiums and a decrease in the point impact of personnel costs related to our annual cash-incentive Gainshare program accrual. The year-to-date increase was primarily due to increased accident severity in both our personal and commercial auto businesses and higher catastrophe losses, partially offset by lower accident frequency in our personal auto business and the higher premium per policy due to rate increases in both our personal and commercial auto businesses.

The following table shows our consolidated catastrophe losses and related combined ratio point impact, excluding loss adjustment expenses, incurred during the periods:

	Three Months Ended September 30, 2022						Nine Months Ended September 30, 2022
	2022			2021			2022			2021
($ in millions)	$		Point1	$		Point1	$		Point1	$		Point1
Personal Lines	$	671.5	7.1	$	421.1	4.7	$	1,001.2	3.6	$	698.0	2.6
Commercial Lines	16.7		0.7	11.7		0.6	29.1		0.4	20.1		0.4
Property	195.0		34.8	289.1		54.9	527.8		31.2	561.7		37.4
Total net catastrophe losses incurred	$	883.2	7.1	$	721.9	6.4	$	1,558.1	4.3	$	1,279.8	3.9

1 Represents catastrophe losses incurred during the period, including the impact of reinsurance, as a percent of net premiums earned for each segment.

We incurred $760 million of catastrophe losses, or 6.1 loss ratio points, during the third quarter 2022 as a result of Hurricane Ian, compared to $510 million, or 4.5 loss ratio points, for the same period last year from Hurricane Ida. About 38% of the incurred catastrophe losses from Hurricane Ian during the three months ended September 30, 2022, were from losses on our special lines products, with boats making up nearly 60% of the special lines losses. In our boat product, we mitigate our hurricane/coastal exposure with underwriting restrictions limiting the insured valued and the length of boats compared to non-hurricane exposed areas, and increased deductibles for named storms. Additionally, we segment and price our hurricane risk by territory, to set rate levels with a catastrophe load based on historical losses to reduce volatile results over a longer time period. Personal and commercial auto losses accounted for 38% and 1%, respectively, while our Property business incurred 23% of the losses, net of reinsurance. Since the vehicle losses get paid fairly quickly, the additional loss adjustment expenses incurred from the storm is relatively small. For our Property business, we retained $25 million of allocated loss adjustment expenses (ALAE), net of reinsurance. On a gross basis, prior to giving effect to our excess of loss reinsurance contract, we estimate our Property catastrophe losses and ALAE from Hurricane Ian would be $1.4 billion. To assist our customers impacted by Hurricane Ian, we have deployed over 1,500 claim representative and independent adjusters. We have responded, and plan to continue to respond, promptly to catastrophic events when they occur in order to provide exemplary claims service to our customers.

Changes in our estimate of our ultimate losses on current catastrophes along with potential future catastrophes could have a material impact on our financial condition, cash flows, or results of operations. We reinsure various risks including, but not limited to, catastrophic losses. We do not have catastrophe-specific reinsurance for our Personal Lines or commercial auto businesses, but we reinsure portions of our Property business. The Property business reinsurance programs include catastrophe occurrence excess of loss contracts and aggregate excess of loss contracts. We also purchase non-weather-related catastrophe reinsurance on our Protective Insurance workers’ compensation insurance.

We evaluate our reinsurance programs during the renewal process, if not more frequently, to ensure our programs continue to effectively address the company’s risk tolerance. During the second quarter 2022, we entered into new reinsurance contracts

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under our per occurrence excess of loss program for our Property business. The reinsurance program provides coverage of up to $2.5 billion if the first covered event occurs in Florida and up to $2.0 billion if the first covered event occurs outside of Florida. Coverage for a second event (and, potentially, for subsequent covered events) would depend on several factors, including the location and the extent of covered losses of the earlier events in the contract period. The per occurrence excess of loss program has retention thresholds for losses and ALAE from the first catastrophic event of $200 million, which is unchanged from the prior contracts, with a retention threshold for a second catastrophic event of $100 million. Portions of our reinsurance programs include reinstatement limits providing coverage for subsequent events, with some portions having an obligatory reinstatement of coverage. Reinstatement premiums would have no effect on our results of operations since, per our contracts, we have reinsurance to cover these situations.

As discussed above, in the third quarter 2022, we retained approximately $175 million of losses and $25 million of ALAE incurred related to Hurricane Ian and ceded $1.2 billion of losses and ALAE under our per occurrence excess of loss program. Under this program, we may be responsible for additional losses if we experience more than two such events or if claims incurred exceed the maximum coverage limits. Coverage for a second event (and, potentially, for subsequent covered events) depends on several factors, including the location and the extent of the losses covered for Hurricane Ian. Based on the estimated impact of Hurricane Ian, we anticipate we would be covered for up to approximately $2.1 billion of losses exceeding the retention threshold related to a second event.

During 2022, we also entered into a new aggregate excess of loss reinsurance contract that increased our retention from $475 million to $575 million and reduced aggregate potential coverage by $50 million, to a total of $175 million, compared to our 2021 program. In our view, our capital position and growing balance sheet enabled us to assume more of these risks via higher retention levels. While the total coverage limit and per-event retention will evolve to fit the growth of our business, we expect to remain a consistent purchaser of reinsurance coverage. Consistent with this history, we were able to fully place our desired coverage at both January 1 and June 1 renewal events. See Item 1 – Description of Business-Reinsurance in our Annual Report on Form 10-K for the year ended December 31, 2021, for a discussion of our various reinsurance programs. During the third quarter and first nine months of 2022, we did not exceed the annual retention thresholds under our 2022 catastrophe aggregate excess of loss program.

The following discussion of our severity and frequency trends in our personal auto business excludes comprehensive coverage because of its inherent volatility, as it is typically linked to catastrophic losses generally resulting from adverse weather. For our commercial auto products, the reported frequency and severity trends include comprehensive coverage. Comprehensive coverage insures against damage to a customer’s vehicle due to various causes other than collision, such as windstorm, hail, theft, falling objects, and glass breakage.

Total personal auto incurred severity (i.e., average cost per claim, including both paid losses and the change in case reserves) on a calendar-year basis increased about 13% and 15% during the third quarter and first nine months of 2022, respectively, compared to the same periods last year. These increases, in part, reflect the impact of inflation, which continues to increase the valuation of used vehicles and our total loss and repair costs.

Following are the changes we experienced in severity in our auto coverages on a year-over-year basis:

•Auto property damage increased about 24% and 23% for the third quarter and first nine months of 2022, respectively, and collision increased 13% and 21%, both in part due to increased used car prices.

•Bodily injury increased about 7% and 8% for the third quarter and first nine months of 2022, respectively, due in part to increasing medical and general damage costs.

•Personal injury protection (PIP) decreased about 14% and 9% during the third quarter and first nine months of 2022, respectively, due in part to coverage reform in Michigan and high reopen activity in Florida during the first half of 2021.

To address inherent seasonality trends and lessen the effects of month-to-month variability in the commercial auto products, we use a trailing 12-month period in assessing severity. In the third quarter 2022, our commercial auto products’ incurred severity, excluding Protective Insurance and our TNC business, increased 11%, compared to the same period last year. In addition to general trends in the marketplace, the increase in our commercial auto products’ severity primarily reflects shifts in the mix of business to for-hire transportation, which has higher average severity than the business auto and contractor business market targets. Since the loss patterns in the TNC business are not indicative of our other commercial auto products, disclosing severity and frequency trends excluding that business is more representative of our overall experience for the majority of our commercial auto products.

It is a challenge to estimate future severity, but we continue to monitor changes in the underlying costs, such as general inflation, used car prices, vehicle repair costs, medical costs, health care reform, court decisions, and jury verdicts, along with regulatory changes and other factors that may affect severity.

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Our personal auto incurred frequency, on a year-over-year basis, decreased about 9% and 6% for the third quarter and first nine months of 2022, respectively, compared to the same periods last year. Following are the frequency changes we experienced by coverage:

•PIP and auto property damage decreased about 8% for the third quarter 2022 and 6% and 5%, respectively, for the first nine months of 2022.

•Collision and bodily injury decreased about 14% and 4%, respectively, for the third quarter and 8% and 5% for the first nine months of 2022.

On a trailing 12-month basis, our commercial auto products’ incurred frequency, excluding Protective Insurance and our TNC business, increased 3% during the third quarter 2022, compared to the same period last year. The frequency increase was in part due to an uneven recovery across different commercial auto business markets, many of which have not yet returned to pre-pandemic levels and are continuing to recover at varying rates since the COVID-19 pandemic lows.

We closely monitor the changes in frequency, but the degree or direction of near-term frequency change is not something that we are able to predict with any degree of confidence, and this challenge is exacerbated by the uncertainty of the current environment. We will continue to analyze trends to distinguish changes in our experience from other external factors, such as changes in the number of vehicles per household, miles driven, vehicle usage, gasoline prices, advances in vehicle safety, and unemployment rates, versus those resulting from shifts in the mix of our business or changes in driving patterns, to allow us to react quickly to price for these trends and to reserve more accurately for our loss exposures.

The table below presents the actuarial adjustments implemented and the loss reserve development experienced on a companywide basis in the following periods:

	Three Months Ended September 30,						Nine Months Ended September 30,
($ in millions)	2022			2021			2022			2021
ACTUARIAL ADJUSTMENTS
Reserve decrease (increase)
Prior accident years	$	(52.6)		$	(45.5)		$	(103.0)		$	(89.7)
Current accident year	25.1			20.5			(28.1)			38.9
Calendar year actuarial adjustments	$	(27.5)		$	(25.0)		$	(131.1)		$	(50.8)
PRIOR ACCIDENT YEARS DEVELOPMENT
Favorable (unfavorable)
Actuarial adjustments	$	(52.6)		$	(45.5)		$	(103.0)		$	(89.7)
All other development	144.7			85.7			50.2			(67.1)
Total development	$	92.1		$	40.2		$	(52.8)		$	(156.8)
(Increase) decrease to calendar year combined ratio	0.7		pts.	0.4		pts.	(0.1)		pts.	(0.5)		pts.

Total development consists of both actuarial adjustments and “all other development” on prior accident years. The actuarial adjustments represent the net changes made by our actuarial staff to both current and prior accident year reserves based on regularly scheduled reviews. Through these reviews, our actuaries identify and measure variances in the projected frequency and severity trends, which allow them to adjust the reserves to reflect the current cost trends. For our Property business, 100% of catastrophe losses are reviewed monthly, and any development on catastrophe reserves are included as part of the actuarial adjustments. For the Personal Lines and Commercial Lines businesses, development for catastrophe losses in the vehicle businesses would be reflected in “all other development,” discussed below, to the extent they relate to prior year reserves. We report these actuarial adjustments separately for the current and prior accident years to reflect these adjustments as part of the total prior accident years development.

“All other development” represents claims settling for more or less than reserved, emergence of unrecorded claims at rates different than anticipated in our incurred but not recorded (IBNR) reserves, and changes in reserve estimates on specific claims. Although we believe the development from both the actuarial adjustments and “all other development” generally results from the same factors, we are unable to quantify the portion of the reserve development that might be applicable to any one or more of those underlying factors.

Our objective is to establish case and IBNR reserves that are adequate to cover all loss costs, while incurring minimal variation from the date the reserves are initially established until losses are fully developed. Our ability to meet this objective is impacted by many factors. Changes in case law, particularly related to PIP, can make it difficult to estimate reserves timely and with minimal variation. See Note 6 – Loss and Loss Adjustment Expense Reserves, for a more detailed discussion of our prior accident years development.

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Underwriting Expenses

The companywide underwriting expense ratio (i.e., policy acquisition costs and other underwriting expenses, net of certain fees and other revenues, expressed as a percentage of net premiums earned) decreased 0.4 points for the third quarter 2022 and 1.2 points for the first nine months, compared to the same periods last year. A decrease in the point impact of personnel costs contributed to the decrease for both the third quarter and year to date, and a year-over-year decrease in advertising spend for the first nine months of 2022. The decrease in personnel costs primarily resulted from a decrease in our annual cash-incentive Gainshare program accrual, reflecting lower year-to-date policies in force growth and segment profitability. In total, our advertising spend was flat for the third quarter and decreased 5% for the first nine months of 2022, compared to the same periods last year, as a result of an effort to improve profitability to reach our 96 combined ratio goal.

To analyze underwriting expenses, we also review our non-acquisition expense ratio (NAER), which excludes costs related to policy acquisition, including advertising and agency commissions, from our underwriting expense ratio. During the third quarter, our NAER increased 0.1 points, 0.6 points, and 0.4 points in our Personal Lines, Commercial Lines, and Property businesses, respectively, compared to the same period last year. On a year-to-date basis, our NAER decreased 0.1 points in Personal Lines and Commercial Lines, and 0.3 points in Property, compared to the same period last year.

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C. Growth

For our underwriting operations, we analyze growth in terms of both premiums and policies. Net premiums written represent the premiums from policies written during the period, less any premiums ceded to reinsurers. Net premiums earned, which are a function of the premiums written in the current and prior periods, are earned as revenue over the life of the policy using a daily earnings convention. Policies in force, our preferred measure of growth since it removes the variability due to rate changes or mix shifts, represents all policies under which coverage was in effect as of the end of the period specified.

	Three Months Ended September 30,						Nine Months Ended September 30,
($ in millions)	2022		2021		% Growth		2022		2021		% Growth
NET PREMIUMS WRITTEN
Personal Lines
Agency	$	4,744.9	$	4,472.2	6	%	$	13,754.9	$	13,257.0	4	%
Direct	5,584.1		4,994.9		12		15,765.5		14,571.7		8
Total Personal Lines	10,329.0		9,467.1		9		29,520.4		27,828.7		6
Commercial Lines	2,063.9		2,374.1		(13)		7,298.4		6,154.5		19
Property	624.5		604.0		3		1,800.2		1,668.5		8
Other indemnity1	0.4		1.3		(69)		1.9		4.2		(55)
Total underwriting operations	$	13,017.8	$	12,446.5	5	%	$	38,620.9	$	35,655.9	8	%
NET PREMIUMS EARNED
Personal Lines
Agency	$	4,441.9	$	4,267.9	4	%	$	13,131.7	$	12,586.4	4	%
Direct	5,077.4		4,690.2		8		14,776.9		13,755.8		7
Total Personal Lines	9,519.3		8,958.1		6		27,908.6		26,342.2		6
Commercial Lines	2,317.9		1,877.4		23		6,749.5		4,917.0		37
Property	561.0		526.5		7		1,689.6		1,501.3		13
Other indemnity1	0.7		2.8		(75)		2.0		6.8		(71)
Total underwriting operations	$	12,398.9	$	11,364.8	9	%	$	36,349.7	$	32,767.3	11	%
1 Primarily includes run-off business operations.
							September 30,
(thousands)							2022		2021		% Growth
POLICIES IN FORCE
Personal Lines
Agency auto							7,600.3		7,973.6		(5)	%
Direct auto							9,823.8		9,613.1		2
Total auto							17,424.1		17,586.7		(1)
Special lines1							5,558.0		5,282.4		5
Personal Lines — total							22,982.1		22,869.1		0
Commercial Lines							1,039.8		952.7		9
Property							2,835.5		2,735.0		4
Companywide total							26,857.4		26,556.8		1	%
1 Includes insurance for motorcycles, watercraft, RVs, and similar items.

To analyze growth, we review new policies, rate levels, and the retention characteristics of our segments. Although new policies are necessary to maintain a growing book of business, we recognize the importance of retaining our current customers as a critical component of our continued growth.

As shown in the tables below, we measure retention by policy life expectancy. We review our customer retention for our personal auto products using both a trailing 3-month and a trailing 12-month period. We believe changes in policy life expectancy using a trailing 12-month period measure is indicative of recent experience, mitigates the effects of month-to-month variability, and addresses seasonality. Although the trailing 3-month measure is sensitive to seasonality and can reflect more volatility, this measure is more responsive to current experience and generally can be an indicator of how our retention rates are moving.

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D. Personal Lines

The following table shows our year-over-year changes for our Personal Lines business:

	Growth Over Prior Year
	Quarter				Year-to-date
	2022		2021		2022		2021
Applications
New	16	%	(15)	%	(8)	%	2	%
Renewal	(2)		11		2		11
Written premium per policy - Auto	10		1		9		(1)
Policy life expectancy - Auto
Trailing 3 months	(30)		10
Trailing 12 months	(21)		4

In our Personal Lines business, we experienced positive new application growth in the third quarter 2022, in part driven by competitor rate increases and targeted media spend. The increase in new applications during the third quarter 2022 resulted from increases in our personal auto products, while our special lines products did not grow during the period. The decrease in our renewal applications reflected the impact of the 8% rate increases that we took during 2021 and the 9% increases taken in the first half of 2022.

Results varied by consumer segment. During the third quarter 2022, personal auto policies in force grew by single digits for the Robinsons and Wrights and decreased by single digits for the Sams and Dianes. New auto applications experienced an increase across all four consumer segments in the third quarter, year over year. Quote volume increased in the third quarter, on a year-over-year basis, in all of our consumer segments, with all consumer segments seeing a flat or decreased rate of conversion.

During the third quarter 2022, we began to loosen underwriting criteria in consumer segments where losses indicated rates are meeting our profitability goals. We implemented personal auto rate increases in 20 states that, in the aggregate, on a countrywide basis, increased rates about 2% for the quarter. The rate increases, which started in the second quarter 2021 and continued throughout the first nine months of 2022, had and may continue to have a negative impact on our renewal business applications and policy life expectancy in the near term, as indicated by the decline in the trailing 3-month and trailing 12-month policy life expectancy.

Our written premium per policy increased during the third quarter and first nine months of 2022, primarily due to the rate increases previously discussed. Our focus on achieving our target underwriting profitability takes precedence over growth. We will continue to manage growth and profitability in accordance with our long-standing goal of growing as fast as we can as long as we can provide great customer service at or below a companywide 96 combined ratio on a calendar-year basis.

We report our Agency and Direct business results separately as components of our Personal Lines segment to provide further understanding of our products by distribution channel. The channel discussions below are focused on personal auto insurance since this product accounted for 93% of the Personal Lines segment net premiums written during both the third quarter and first nine months of 2022.

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The Agency Business

	Growth Over Prior Year
	Quarter				Year-to-date
	2022		2021		2022		2021
Applications - Auto
New	9	%	(20)	%	(14)	%	(3)	%
Renewal	(6)		8		(3)		9
Written premium per policy - Auto	12		2		11		0
Policy life expectancy - Auto
Trailing 3 months	(33)		10
Trailing 12 months	(23)		4

The Agency business includes business written by more than 40,000 independent insurance agencies that represent Progressive, as well as brokerages in New York and California. During the third quarter 2022, 33 states generated new Agency auto application growth, including seven of our top 10 largest Agency states. During the third quarter, each of our consumer segments experienced an increase in new applications except Robinsons, which experienced a single digit decrease year over year. Policies in force decreased in each segment, compared to the same period last year.

During the third quarter and first nine months of 2022, we experienced an increase in Agency auto quote volume of 23% and 12%, respectively. The rate of conversion (i.e., converting a quote to a sale) decreased 10% and 23%, compared to the same periods last year, reflecting the impact of rate increases and tightened underwriting criteria. For the third quarter and year-to-date periods, quote volume increased and conversion decreased, compared to last year, in each consumer segment. Written premium per policy for new and renewal Agency auto business increased 9% and 12%, respectively, compared to the third quarter 2021. The decreases in policy life expectancy were expected given the rate actions taken over the last year, and policy life expectancy may continue to be negatively impacted by our current rate actions.

The Direct Business

	Growth Over Prior Year
	Quarter				Year-to-date
	2022		2021		2022		2021
Applications - Auto
New	26	%	(14)	%	(5)	%	4	%
Renewal	(1)		13		3		14
Written premium per policy - Auto	9		0		8		(2)
Policy life expectancy - Auto
Trailing 3 months	(27)		11
Trailing 12 months	(18)		4

The Direct business includes business written directly by Progressive online, through mobile devices, and over the phone. During the quarter, 39 states and the District of Columbia generated new auto application growth, including five of our top 10 largest Direct states. During the third quarter 2022, total auto applications increased 4% due to growth in new applications. During the third quarter, new applications increased across all consumer segments, while policies in force grew in all consumer segments except Sams, which experienced a single digit decrease.

During the third quarter and first nine months of 2022, Direct auto quote volume increased 31% and 6%, respectively, while our rate of conversion decreased 2% and 10%, compared to the same periods last year. The increase we experienced in our quote volume primarily reflected competitors raising rates. We also experienced gains in the efficiency of our media spend during the quarter, which contributed to the increase in quotes and the significant increase in new auto applications. During the third quarter, quote volume increased in all consumer segments and, during the first nine months, increased in all consumer segments except Sams. Wrights and Robinsons saw an increase in conversion for the third quarter 2022, while all consumer segments experienced flat to decreased conversion during the first nine months.

During the third quarter 2022, written premium per policy for new and renewal Direct auto business increased 8% and 9%, respectively, compared to the same period last year, primarily driven by rate increases. Consistent with our Agency business, the Direct business decrease in policy life expectancy reflects the rate actions taken over the last year.

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E. Commercial Lines

The following table shows our year-over-year changes for our Commercial Lines business, excluding our TNC, BOP, and Protective Insurance products:

	Growth Over Prior Year
	Quarter				Year-to-date
	2022		2021		2022		2021
Applications
New	(6)	%	18	%	(1)	%	32	%
Renewal	10		15		13		12
Written premium per policy	8		20		14		17
Policy life expectancy - Trailing 12 months	(9)		13

Our Commercial Lines business operates in five traditional business markets, which include business auto, for-hire transportation, contractor, for-hire specialty, and tow markets, primarily written through the agency channel. We also write TNC business and BOP insurance. In the second quarter 2021, we acquired Protective Insurance, which expanded our portfolio of offerings to larger fleet and workers’ compensation insurance for trucking, along with trucking industry independent contractors, and affinity programs; these products are excluded from the table above.

During the third quarter 2022, the decrease in Commercial Lines new application growth primarily reflected a slow down from the significant amount of growth experienced in 2021, primarily in our for-hire transportation and for-hire specialty business markets, and the softening of the freight market during the period. During the third quarter 2022, we experienced flat quote volume and a decrease of 6% in the rate of conversion, compared to the same period last year, primarily driven by the for-hire transportation market. During the first nine months of 2022, quote volume increased 3%, while conversion decreased 4%, compared to the same period last year.

During the third quarter, written premium per policy for new commercial auto business increased 2%, while renewal business increased 14%, compared to the same period last year. The increases in written premiums were primarily due to rate increases. Our policy life expectancy decreased primarily driven by our for-hire transportation business market. Given the rise in costs to operate a trucking business, many independent owner/operators, who were our core customers, have begun to migrate back to leasing with larger motor carriers.

F. Property

The following table shows our year-over-year changes for our Property business:

	Growth Over Prior Year
	Quarter				Year-to-date
	2022		2021		2022		2021
Applications
New	(9)	%	16	%	(7)	%	24	%
Renewal	7		11		8		10
Written premium per policy	5		1		4		1
Policy life expectancy - Trailing 12 months	(9)		(8)

Our Property business writes residential property insurance for homeowners, other property owners, and renters, in the agency and direct channels. During the third quarter and first nine months of 2022, our Property business experienced a decrease in new applications, primarily due to the rate and other actions taken to address the profitability concerns.

During 2022, we continued to make underwriting changes to reduce our concentration risks by focusing our growth efforts in states with traditionally less catastrophe exposure and limit growth in the coastal and hail-prone states. During 2021, we announced plans to non-renew about 60,000 policies in Florida, starting during the second quarter 2022. During the second quarter 2022, new legislation was introduced prohibiting the non-renewal of certain policies. In response, we changed our process to provide impacted policyholders the opportunity to have their policy renewed if meeting certain criteria. We expect to non-renew less of the policies formerly intended for non-renewal, as previously discussed. In light of the regulatory changes, we are identifying other opportunities to reduce our exposure in the coastal states.

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The targeted rate increases taken during the last 12 months, are beginning to be earned into the book of business; however, we realize that our current pricing actions and underwriting activities to limit growth in the coastal and hail-prone states and to increase our exposure in states with traditionally less catastrophe exposure will require more time than originally anticipated. This information, combined with the continued extent of the weather-related losses, prompted us to reevaluate the portion of goodwill assigned to our Property business for impairment, resulting in a non-cash goodwill impairment charge of $224.8 million during the second quarter 2022, which represented the entire amount of goodwill assigned to the ARX reporting unit.

In addition to rate increases, as part of the underwriting changes discussed above, during the third quarter 2022 our written premium per policy increased, compared to the same period last year, primarily due to an increase in coverage values to account for inflation. The written premium per policy impact from rate increases and underwriting changes were partially offset by a shift in the mix of business to a larger share of renters policies, which have lower written premiums per policy. Our policy life expectancy decreased from the same period last year, primarily due to the targeted rate increases in states where we were not achieving our profitability targets. We intend to continue to make targeted rate increases in states where we believe it is necessary to achieve our profitability targets.

G. Income Taxes

A deferred tax asset or liability is a tax benefit or expense that is expected to be realized in a future period. At September 30, 2022, we reported a net federal deferred tax asset of $1.3 billion, compared to a net federal deferred tax liability at September 30, 2021, and December 31, 2021, of $110.7 million and $152.9 million, respectively. The change to a deferred asset from a deferred liability was primarily due to unrealized losses on securities in the fixed-income and equity portfolios recognized over the last 12 months. Based on all of the available evidence, including the existing taxable temporary differences that will generate capital gains, our realized capital gains available in the carryback period, and our intent and ability to hold a portion of our fixed-maturity securities in an unrealized tax loss position until maturity, we determined that no valuation allowance is required at September 30, 2022.

At September 30, 2022, and December 31, 2021, we had recoverable income taxes of $31.0 million and $19.2 million, respectively, which were reported as part of other assets in our consolidated balance sheets, compared to net current income taxes payable of $36.2 million, which were reported as part of accounts payable, accrued expenses, and other liabilities at September 30, 2021. The taxes payable/recoverable vary from period to period based on the amount of estimated taxes paid.

The effective tax rates for the three and nine months ended September 30, 2022, were 12.9% and (1.6)%, respectively, compared to 14.7% and 20.5% for the same periods last year. The difference between the reported effective tax rates and the statutory tax rate of 21% reflects the impact of a number of factors, including the amount of pretax income (loss) earned in the period, our typical permanent tax differences such as stock-based compensation, and, for the nine months ended September 30, 2022, the effect of the goodwill impairment, which was a nonrecurring charge. See Note 5 – Income Taxes for a reconciliation between the statutory and the effective tax rates.

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IV. RESULTS OF OPERATIONS – INVESTMENTS

A. Investment Results

Our management philosophy governing the portfolio is to evaluate investment results on a total return basis. The fully taxable equivalent (FTE) total return includes recurring investment income, adjusted to a fully taxable amount for certain securities that receive preferential tax treatment (e.g., municipal securities), and total net realized, and changes in total net unrealized, gains (losses) on securities.

The following table summarizes investment results for the periods ended September 30:

	Three Months				Nine Months
	2022		2021		2022		2021
Pretax recurring investment book yield (annualized)	2.5	%	1.8	%	2.2	%	1.9	%
FTE total return:
Fixed-income securities	(1.8)		0.2		(7.6)		0.3
Common stocks	(4.5)		0.2		(24.0)		21.0
Total portfolio	(1.9)		0.2		(9.0)		2.1

The increase in the book yield, compared to last year, for both periods, primarily reflected investing new cash from operations and proceeds from maturing bonds at higher interest rates and an increase in interest rates on our floating-rate securities. The decrease in the fixed-income total return, compared to last year, reflected the impact of rising interest rates during the last twelve months, as well as widening credit spreads, while the decrease in common stocks reflected general market conditions.

A further break-down of our FTE total returns for our fixed-income portfolio for the periods ended September 30, follows: 

	Three Months				Nine Months
	2022		2021		2022		2021
Fixed-income securities:
U.S. Treasury Notes	(2.9)	%	0.1	%	(8.5)	%	(0.6)	%
Municipal bonds	(2.9)		(0.2)		(9.4)		0.2
Corporate bonds	(1.5)		0.3		(8.0)		0
Residential mortgage-backed securities	0.6		0.3		(0.9)		1.1
Commercial mortgage-backed securities	(2.0)		0.1		(9.5)		1.1
Other asset-backed securities	(0.4)		0.3		(3.0)		0.9
Preferred stocks	0.6		1.0		(10.4)		7.2
Short-term investments	0.5		0		0.7		0.1

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B. Portfolio Allocation

The composition of the investment portfolio was: 

($ in millions)	Fair Value		% of Total Portfolio		Duration (years)	Rating1
September 30, 2022
U.S. government obligations	$	22,405.5	42.8	%	3.5	AAA
State and local government obligations	1,925.5		3.7		3.7	AA+
Foreign government obligations	15.3		0.1		3.8	AAA
Corporate debt securities	9,228.4		17.6		2.9	BBB
Residential mortgage-backed securities	723.0		1.4		0.4	A
Commercial mortgage-backed securities	5,087.9		9.7		2.7	A+
Other asset-backed securities	4,605.9		8.8		1.1	AA+
Preferred stocks	1,436.0		2.7		2.9	BBB-
Short-term investments	4,237.6		8.1		<0.1	AA+
Total fixed-income securities	49,665.1		94.9		2.7	AA
Common equities	2,665.3		5.1		na	na
Total portfolio2	$	52,330.4	100.0	%	2.7	AA
September 30, 2021
U.S. government obligations	$	21,142.1	40.3	%	3.2	AAA
State and local government obligations	2,165.9		4.1		3.7	AA+
Foreign government obligations	12.3		0.1		1.3	AA+
Corporate debt securities	10,861.7		20.7		3.1	BBB
Residential mortgage-backed securities	627.9		1.2		1.2	A+
Commercial mortgage-backed securities	5,789.0		11.1		3.5	A+
Other asset-backed securities	4,262.2		8.2		1.3	AA
Preferred stocks	1,757.4		3.4		3.5	BBB-
Short-term investments	1,088.7		2.1		0.2	AA+
Total fixed-income securities	47,707.2		91.2		3.0	AA-
Common equities	4,580.2		8.8		na	na
Total portfolio2	$	52,287.4	100.0	%	3.0	AA-
December 31, 2021
U.S. government obligations	$	18,488.2	35.9	%	3.6	AAA
State and local government obligations	2,185.3		4.2		3.6	AA+
Foreign government obligations	17.9		0.1		4.5	AAA
Corporate debt securities	10,692.1		20.7		2.9	BBB
Residential mortgage-backed securities	790.0		1.5		0.4	A-
Commercial mortgage-backed securities	6,535.6		12.7		3.2	A+
Other asset-backed securities	4,982.3		9.7		1.2	AA
Preferred stocks	1,821.6		3.6		3.6	BBB-
Short-term investments	942.6		1.8		0.2	AA
Total fixed-income securities	46,455.6		90.2		3.0	AA-
Common equities	5,058.5		9.8		na	na
Total portfolio2	$	51,514.1	100.0	%	3.0	AA-
na = not applicable

1 Represents ratings at period end. Credit quality ratings are assigned by nationally recognized statistical rating organizations. To calculate the weighted average credit quality ratings, we weight individual securities based on fair value and assign a numeric score of 0-5, with non-investment-grade and non-rated securities assigned a score of 0-1. To the extent the weighted average of the ratings falls between AAA and AA+, we assign an internal rating of AAA-.

2 Includes $74.7 million, $399.7 million, and $143.4 million of net unsettled security purchase transactions at September 30, 2022 and 2021, and December 31, 2021, respectively, with the offsetting payable included in other liabilities.

The total fair value of the portfolio at September 30, 2022 and 2021, and December 31, 2021, included $4.2 billion, $2.9 billion, and $4.2 billion, respectively, of securities held in a consolidated, non-insurance subsidiary of the holding company, net of unsettled security transactions.

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Our asset allocation strategy is to maintain 0%-25% of our portfolio in Group I securities, with the balance (75%-100%) of our portfolio in Group II securities.

We define Group I securities to include:

•common equities,

•nonredeemable preferred stocks,

•redeemable preferred stocks, except for 50% of investment-grade redeemable preferred stocks with cumulative dividends, which are included in Group II, and

•all other non-investment-grade fixed-maturity securities.

Group II securities include:

•short-term securities, and

•all other fixed-maturity securities, including 50% of the investment-grade redeemable preferred stocks with cumulative dividends.

We believe this asset allocation strategy allows us to appropriately assess the risks associated with these securities for capital purposes and is in line with the treatment by our regulators.

The following table shows the composition of our Group I and Group II securities: 

	September 30, 2022				September 30, 2021				December 31, 2021
($ in millions)	Fair Value		% of Total Portfolio		Fair Value		% of Total Portfolio		Fair Value		% of Total Portfolio
Group I securities:
Non-investment-grade fixed maturities	$	1,419.9	2.7	%	$	2,149.4	4.1	%	$	2,032.4	3.9	%
Redeemable preferred stocks1	90.8		0.2		92.3		0.2		90.9		0.2
Nonredeemable preferred stocks	1,254.4		2.4		1,572.8		3.0		1,639.9		3.2
Common equities	2,665.3		5.1		4,580.2		8.8		5,058.5		9.8
Total Group I securities	5,430.4		10.4		8,394.7		16.1		8,821.7		17.1
Group II securities:
Other fixed maturities	42,662.4		81.5		42,804.0		81.8		41,749.8		81.1
Short-term investments	4,237.6		8.1		1,088.7		2.1		942.6		1.8
Total Group II securities	46,900.0		89.6		43,892.7		83.9		42,692.4		82.9
Total portfolio	$	52,330.4	100.0	%	$	52,287.4	100.0	%	$	51,514.1	100.0	%

1 We did not hold any non-investment-grade redeemable preferred stocks at September 30, 2022 and 2021, or December 31, 2021.

To determine the allocation between Group I and Group II, we use the credit ratings from models provided by the National Association of Insurance Commissioners (NAIC) to classify our residential and commercial mortgage-backed securities, excluding interest-only securities, and the credit ratings from nationally recognized statistical rating organizations (NRSRO) to classify all other debt securities. NAIC ratings are based on a model that considers the book price of our securities when assessing the probability of future losses in assigning a credit rating. As a result, NAIC ratings can vary from credit ratings issued by NRSROs. Management believes NAIC ratings more accurately reflect our risk profile when determining the asset allocation between Group I and Group II securities.

The decrease in the percentage of Group I securities since year end was driven by sales and valuation declines in our common equity portfolio, with the proceeds from the common stock sales and the $1.5 billion debt offering in March 2022 reinvested in Group II short-term investments.

Unrealized Gains and Losses

As of September 30, 2022, our fixed-maturity portfolio had pretax net unrealized losses, recorded as part of accumulated other comprehensive income, of $3,941.3 million, compared to net unrealized gains of $474.5 million and $71.4 million at September 30, 2021 and December 31, 2021, respectively. The decreases from both periods in 2021 were due to increasing interest rates across our fixed-maturity portfolio and wider credit spreads outside of our short-term and Treasury portfolios.

See Note 2 – Investments for a further break-out of our gross unrealized gains (losses).

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Holding Period Gains and Losses

The following table provides the balance and activity for both the gross and net holding period gains (losses) for the nine months ended September 30, 2022:

(millions)	Gross Holding Period Gains		Gross Holding Period Losses		Net Holding Period Gains (Losses)
Balance at December 31, 2021
Hybrid fixed-maturity securities	$	13.0	$	(5.5)	$	7.5
Equity securities	3,877.2		(14.7)		3,862.5
Total holding period securities	3,890.2		(20.2)		3,870.0
Current year change in holding period securities
Hybrid fixed-maturity securities	(13.0)		(85.8)		(98.8)
Equity securities	(1,990.7)		(173.4)		(2,164.1)
Total changes in holding period securities	(2,003.7)		(259.2)		(2,262.9)
Balance at September 30, 2022
Hybrid fixed-maturity securities	0		(91.3)		(91.3)
Equity securities	1,886.5		(188.1)		1,698.4
Total holding period securities	$	1,886.5	$	(279.4)	$	1,607.1

Changes in holding period gains (losses), similar to unrealized gains (losses) in our fixed-maturity portfolio, are the result of changes in market performance as well as sales of securities based on various portfolio management decisions.

Fixed-Income Securities

The fixed-income portfolio is managed internally and includes fixed-maturity securities, short-term investments, and nonredeemable preferred stocks.

Following are the primary exposures for our fixed-income portfolio. Details of our policies related to these exposures can be found in the Management’s Discussion and Analysis included in our 2021 Annual Report to Shareholders.

•Interest rate risk - our duration of 2.7 years at September 30, 2022, fell within our acceptable range of 1.5 to 5 years. We shortened our portfolio duration from 3.0 years at December 31, 2021, which we believe provides some protection against further increases in interest rates. The duration distribution of our fixed-income portfolio, excluding short-term investments, represented by the interest rate sensitivity of the comparable benchmark U.S. Treasury Notes, was:

Duration Distribution (excluding short-term securities)	September 30, 2022		September 30, 2021		December 31, 2021
1 year	19.3	%	25.2	%	22.0	%
2 years	19.1		19.5		18.8
3 years	23.1		22.5		23.5
5 years	20.4		15.9		17.6
7 years	13.5		11.8		13.1
10 years	4.6		5.1		5.0
Total fixed-income portfolio	100.0	%	100.0	%	100.0	%

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•Credit risk - our credit quality rating of AA was above our minimum threshold during the third quarter 2022. The credit quality distribution of the fixed-income portfolio was:

Rating	September 30, 2022		September 30, 2021		December 31, 2021
AAA	63.2	%	58.3	%	54.7	%
AA	6.7		7.2		8.7
A	7.1		8.4		8.6
BBB	19.1		20.6		21.7
Non-investment grade/non-rated1
BB	3.1		4.1		4.8
B	0.5		1.0		1.1
CCC and lower	0.1		0.1		0.1
Non-rated	0.2		0.3		0.3
Total fixed-income portfolio	100.0	%	100.0	%	100.0	%

1 The ratings in the table above are assigned by NRSROs.

•Concentration risk - we did not have any investments in a single issuer, either overall or in the context of individual asset classes and sectors, that exceeded our thresholds during the third quarter 2022.

•Prepayment and extension risk - we did not experience significant adverse prepayment or extension of principal relative to our cash flow expectations in the portfolio during the third quarter 2022.

•Liquidity risk - our overall portfolio remains very liquid and we believe that it is sufficient to meet expected near-term liquidity requirements.

◦The short-to-intermediate duration of our portfolio provides a source of liquidity, as we expect approximately $6.2 billion, or 28.3%, of principal repayment from our fixed-income portfolio, excluding U.S. Treasury Notes and short-term investments, during the remainder of 2022 and all of 2023. Cash from interest and dividend payments and our short-term portfolio provide additional sources of recurring liquidity.

◦The duration of our U.S. government obligations, which are included in the fixed-income portfolio, was comprised of the following at September 30, 2022:

($ in millions)	Fair Value		Duration (years)
U.S. Treasury Notes
Less than one year	$	581.5	0.7
One to two years	5,559.2		1.6
Two to three years	4,844.5		2.4
Three to five years	5,774.6		3.9
Five to seven years	4,217.3		5.6
Seven to ten years	1,428.4		8.0
Total U.S. Treasury Notes	$	22,405.5	3.5

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ASSET-BACKED SECURITIES

Included in the fixed-income portfolio are asset-backed securities, which were comprised of the following at the balance sheet dates listed: 

($ in millions)	Fair Value		Net Unrealized Gains (Losses)		% of Asset- Backed Securities		Duration (years)	Rating (at period end)1
September 30, 2022
Residential mortgage-backed securities	$	723.0	$	(16.1)	6.9	%	0.4	A
Commercial mortgage-backed securities	5,087.9		(746.0)		48.9		2.7	A+
Other asset-backed securities	4,605.9		(268.9)		44.2		1.1	AA+
Total asset-backed securities	$	10,416.8	$	(1,031.0)	100.0	%	1.8	AA-
September 30, 2021
Residential mortgage-backed securities	$	627.9	$	2.5	5.9	%	1.2	A+
Commercial mortgage-backed securities	5,789.0		49.6		54.2		3.5	A+
Other asset-backed securities	4,262.2		26.6		39.9		1.3	AA
Total asset-backed securities	$	10,679.1	$	78.7	100.0	%	2.5	AA-
December 31, 2021
Residential mortgage-backed securities	$	790.0	$	1.7	6.4	%	0.4	A-
Commercial mortgage-backed securities	6,535.6		(25.4)		53.1		3.2	A+
Other asset-backed securities	4,982.3		0.9		40.5		1.2	AA
Total asset-backed securities	$	12,307.9	$	(22.8)	100.0	%	2.2	AA-

1 The credit quality ratings in the table above are assigned by NRSROs.

Residential Mortgage-Backed Securities (RMBS) The following table details the credit quality rating and fair value of our RMBS, along with the loan classification and a comparison of the fair value at September 30, 2022, to our original investment value (adjusted for returns of principal, amortization, and write-downs):

Residential Mortgage-Backed Securities (at September 30, 2022)
($ in millions) Rating1	Non-Agency			Government/GSE2			Total			% of Total
AAA	$	137.0		$	1.2		$	138.2		19.1	%
AA	17.3			0.4			17.7			2.4
A	361.5			0			361.5			50.0
BBB	196.1			0			196.1			27.1
Non-investment grade/non-rated:
BB	0.5			0			0.5			0.1
B	0			0			0			0
CCC and lower	2.7			0			2.7			0.4
Non-rated	6.3			0			6.3			0.9
Total fair value	$	721.4		$	1.6		$	723.0		100.0	%
Increase (decrease) in value	(4.1)		%	(3.1)		%	(4.1)		%

1 The credit quality ratings are assigned by NRSROs; when we assigned the NAIC ratings for our RMBS, 96.5% of our non-investment-grade securities were rated investment grade and reported as Group II securities, with the remainder classified as Group I.

2 The securities in this category are insured by a Government Sponsored Entity (GSE) and/or collateralized by mortgage loans insured by the Federal Housing Administration (FHA) or the U.S.Department of Veteran Affairs (VA). .

In the residential mortgage-backed sector, our portfolio consists of deals that are backed by high-credit quality borrowers or have strong structural protections through underlying loan collateralization. During the third quarter 2022, we did not make any purchases or sales to the residential mortgage-backed portfolio. The decrease in market value was mostly attributed to principal paydowns.

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Commercial Mortgage-Backed Securities (CMBS) The following table details the credit quality rating and fair value of our CMBS, along with a comparison of the fair value at September 30, 2022, to our original investment value (adjusted for returns of principal, amortization, and write-downs):

Commercial Mortgage-Backed Securities (at September 30, 2022)
($ in millions) Rating1	Multi-Borrower			Single-Borrower			Total			% of Total
AAA	$	227.1		$	1,233.8		$	1,460.9		28.7	%
AA	0			1,267.1			1,267.1			24.9
A	0			948.3			948.3			18.7
BBB	0			953.3			953.3			18.7
Non-investment grade/non-rated:
BB	0			458.2			458.2			9.0
B	0.1			0			0.1			0
Total fair value	$	227.2		$	4,860.7		$	5,087.9		100.0	%
Increase (decrease) in value	(6.4)		%	(13.1)		%	(12.8)		%

1 The credit quality ratings are assigned by NRSROs; when we assigned the NAIC ratings for our CMBS, 38% of our non-investment-grade securities were rated investment grade and reported as Group II securities, with the remainder classified as Group I.

The CMBS portfolio experienced wider spreads and high volatility in the third quarter 2022. New issuances in the single-asset single-borrower (SASB) market slowed significantly due to less favorable market conditions, as well as low trading volumes and liquidity in the secondary trading market. Given ongoing uncertainty about the future trajectory of the economy and its impact on real estate, we did not add to our portfolio during the quarter, and reduced certain positions that we believe will be sensitive to potential future economic weakness. Our focus continues to be on SASB with high-quality collateral in the office, self-storage, multi-family, and industrial sectors.

Other Asset-Backed Securities (OABS) The following table details the credit quality rating and fair value of our OABS, along with a comparison of the fair value at September 30, 2022, to our original investment value (adjusted for returns of principal, amortization, and write-downs):

Other Asset-Backed Securities (at September 30, 2022)
($ in millions) Rating	Automobile			Collateralized Loan Obligations			Student Loan			Whole Business Securitizations			Equipment			Other			Total			% of Total
AAA	$	975.2		$	1,182.0		$	43.8		$	0		$	508.0		$	190.2		$	2,899.2		62.9	%
AA	133.6			566.1			5.4			0			125.2			25.3			855.6			18.6
A	17.6			0			7.2			0			69.7			135.6			230.1			5.0
BBB	6.6			0			0			548.7			0			34.7			590.0			12.8
Non-investment grade/non-rated:
BB	0			0			0			0			0			31.0			31.0			0.7
Total fair value	$	1,133.0		$	1,748.1		$	56.4		$	548.7		$	702.9		$	416.8		$	4,605.9		100.0	%
Increase (decrease) in value	(1.8)		%	(4.9)		%	(9.7)		%	(14.3)		%	(2.5)		%	(9.7)		%	(5.6)		%

Our OABS portfolio offered less relative value in the third quarter 2022. The portfolio decreased due to sales, amortization, and scheduled paydowns. We selectively added short-maturity securities in our OABS portfolio and we did not add any collateralized loan obligations during the quarter.

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MUNICIPAL SECURITIES

The following table details the credit quality rating of our municipal securities at September 30, 2022, without the benefit of credit or bond insurance:

Municipal Securities (at September 30, 2022)
(millions) Rating	General Obligations		Revenue Bonds		Total
AAA	$	540.1	$	235.2	$	775.3
AA	448.7		663.0		1,111.7
A	0		37.7		37.7
BBB	0		0.6		0.6
Non-rated	0		0.2		0.2
Total	$	988.8	$	936.7	$	1,925.5

Included in revenue bonds were $463.8 million of single-family housing revenue bonds issued by state housing finance agencies, of which $322.6 million were supported by individual mortgages held by the state housing finance agencies and $141.2 million were supported by mortgage-backed securities.

Of the programs supported by mortgage-backed securities, 81% were collateralized by Ginnie Mae mortgages, which are fully guaranteed by the U.S. government; the remaining 19% were collateralized by Fannie Mae and Freddie Mac mortgages. Of the programs supported by individual mortgages held by the state housing finance agencies, the overall credit quality rating was AA+. Most of these mortgages were supported by the Federal Housing Administration, the U.S. Department of Veterans Affairs, or private mortgage insurance providers.

Credit spreads for longer tax-exempt municipal bonds tightened during the third quarter 2022, while spreads for shorter tax-exempt municipal bonds, as well as taxable municipal bonds, widened. Our allocation to the municipal bond sector declined modestly and we were not active during the quarter.

CORPORATE DEBT SECURITIES

The following table details the credit quality rating of our corporate debt securities at September 30, 2022:

Corporate Securities (at September 30, 2022)
(millions) Rating	Consumer		Industrial		Communication		Financial Services		Technology		Basic Materials		Energy		Total
AA	$	22.3	$	0	$	0	$	217.0	$	1.2	$	0	$	40.6	$	281.1
A	306.0		235.1		152.4		924.8		28.2		112.4		176.1		1,935.0
BBB	2,127.5		1,256.7		115.5		957.9		569.4		12.5		868.5		5,908.0
Non-investment grade/non-rated:
BB	268.0		143.6		188.9		89.3		33.8		22.2		57.3		803.1
B	236.5		17.0		0		0		0		0		0		253.5
CCC and lower	47.7		0		0		0		0		0		0		47.7
Total fair value	$	3,008.0	$	1,652.4	$	456.8	$	2,189.0	$	632.6	$	147.1	$	1,142.5	$	9,228.4

The size of our corporate debt portfolio decreased from $10.2 billion at June 30, 2022 to $9.2 billion at September 30, 2022. This decrease was due to securities that matured, sales of securities with less attractive risk/reward profiles, and a decline in the portfolio valuation due to the increase in interest rates.

We slightly shortened the maturity profile of the corporate debt portfolio during the third quarter 2022. The duration of the corporate portfolio was 2.9 years at September 30, 2022, compared to 3.0 years at June 30, 2022. Overall, our corporate securities, as a percentage of the fixed-income portfolio, decreased during the third quarter 2022. At September 30, 2022, our corporate debt securities made up approximately 19% of the fixed-income portfolio, compared to approximately 21% at June 30, 2022. This decrease reflects our more conservative stance in the economic environment prevailing during the quarter.

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PREFERRED STOCKS – REDEEMABLE AND NONREDEEMABLE

The table below shows the exposure break-down by sector and rating at September 30, 2022:

Preferred Stocks (at September 30, 2022)
	Financial Services
(millions) Rating	U.S. Banks		Foreign Banks		Insurance		Other Financial		Industrials		Utilities		Total
BBB	$	775.7	$	31.4	$	92.5	$	36.4	$	133.0	$	42.7	$	1,111.7
Non-investment grade/non-rated:
BB	144.6		35.7		0		0		24.7		37.4		242.4
Non-rated	0		0		43.8		21.1		17.0		0		81.9
Total fair value	$	920.3	$	67.1	$	136.3	$	57.5	$	174.7	$	80.1	$	1,436.0

The majority of our preferred securities have fixed-rate dividends until a call date and then, if not called, generally convert to floating-rate dividends. The interest rate duration of our preferred securities is calculated to reflect the call, floor, and floating-rate features. Although a preferred security will remain outstanding if not called, its interest rate duration will reflect the variable nature of the dividend. Our non-investment-grade preferred stocks were all with issuers that maintain investment-grade senior debt ratings.

We also face the risk that dividend payments on our preferred stock holdings could be deferred for one or more periods or skipped entirely. As of September 30, 2022, all of our preferred securities continued to pay their dividends in full and on time. Approximately 81% of our preferred stock securities pay dividends that have tax preferential characteristics, while the balance pay dividends that are fully taxable.

Our preferred stock portfolio declined from $1.6 billion at June 30, 2022 to $1.4 billion at September 30, 2022. The decline was primarily due to sales of preferred securities with less attractive risk/reward profiles as we took a more conservative stance in the economic environment prevailing during the quarter.

Common Equities

Common equities, as reported on the balance sheets, were comprised of the following:

($ in millions)	September 30, 2022				September 30, 2021				December 31, 2021
Common stocks	$	2,646.6	99.3	%	$	4,567.6	99.7	%	$	5,041.6	99.7	%
Other risk investments	18.7		0.7		12.6		0.3		16.9		0.3
Total common equities	$	2,665.3	100.0	%	$	4,580.2	100.0	%	$	5,058.5	100.0	%

The majority of our common stock portfolio consists of individual holdings selected based on their contribution to the correlation with the Russell 1000 Index. We held 791 out of 1,016, or 78%, of the common stocks comprising the index at September 30, 2022, which made up 95% of the total market capitalization of the index. At September 30, 2022 and 2021, and December 31, 2021, the year-to-date total return, based on GAAP income, was within our targeted tracking error, which is +/- 50 basis points.

The other risk investments consist of limited partnership interests. During the third quarter 2022, we funded partnership investments of $0.2 million, and we have an open funding commitment of $7.1 million at September 30, 2022.

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Safe Harbor Statement Under the Private Securities Litigation Reform Act of 1995: Investors are cautioned that certain statements in this report not based upon historical fact are forward-looking statements as defined in the Private Securities Litigation Reform Act of 1995. These statements often use words such as “estimate,” “expect,” “intend,” “plan,” “believe,” and other words and terms of similar meaning, or are tied to future periods, in connection with a discussion of future operating or financial performance. Forward-looking statements are based on current expectations and projections about future events, and are subject to certain risks, assumptions and uncertainties that could cause actual events and results to differ materially from those discussed herein. These risks and uncertainties include, without limitation, uncertainties related to:

•our ability to underwrite and price risks accurately and to charge adequate rates to policyholders;

•our ability to establish accurate loss reserves;

•the impact of severe weather, other catastrophe events and climate change;

•the effectiveness of our reinsurance programs and the continued availability of reinsurance and performance by reinsurers;

•the highly competitive nature of property-casualty insurance markets;

•whether we innovate effectively and respond to our competitors’ initiatives;

•whether we effectively manage complexity as we develop and deliver products and customer experiences;

•how intellectual property rights affect our competitiveness and our business operations;

•whether we adjust claims accurately;

•our ability to maintain a recognized and trusted brand;

•our ability to attract, develop and retain talent and maintain appropriate staffing levels;

•compliance with complex and changing laws and regulations;

•litigation challenging our business practices, and those of our competitors and other companies;

•the impacts of a security breach or other attack involving our computer systems or the systems of one or more of our vendors;

•the secure and uninterrupted operation of the facilities, systems, and business functions that are critical to our business;

•the success of our efforts to acquire or develop new products or enter into new areas of business and navigate related risks;

•our continued ability to send and accept electronic payments;

•the possible impairment of our goodwill or intangible assets;

•the performance of our fixed-income and equity investment portfolios;

•the impact on our investment returns and strategies from regulations and societal pressures relating to environmental, social, and other public policy matters;

•the elimination of the London Interbank Offered Rate;

•our continued ability to access our cash accounts and/or convert securities into cash on favorable terms;

•the impact if one or more parties with which we enter into significant contracts or transact business fail to perform;

•legal restrictions on our insurance subsidiaries’ ability to pay dividends to The Progressive Corporation;

•limitations on our ability to pay dividends on our common shares under the terms of our outstanding preferred shares;

•our ability to obtain capital when necessary to support our business and potential growth;

•evaluations by credit rating and other rating agencies;

•the variable nature of our common share dividend policy;

•whether our investments in certain tax-advantaged projects generate the anticipated returns;

•the impact from not managing to short-term earnings expectations in light of our goal to maximize the long-term value of the enterprise;

•the impacts of the COVID-19 pandemic and measures taken in response; and

•other matters described from time to time in our releases and publications, and in our periodic reports and other documents filed with the United States Securities and Exchange Commission, including, without limitation, the Risk Factors section of our Annual Report on Form 10-K for the year ending December 31, 2021.

In addition, investors should be aware that generally accepted accounting principles prescribe when a company may reserve for particular risks, including litigation exposures. Accordingly, results for a given reporting period could be significantly affected if and when we establish reserves for one or more contingencies. Also, our regular reserve reviews may result in adjustments of varying magnitude as additional information regarding claims activity becomes known. Reported results, therefore, may be volatile in certain accounting periods.

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Item 3. Quantitative and Qualitative Disclosures About Market Risk.

The duration of the financial instruments held in our portfolio that are subject to interest rate risk was 2.7 years at September 30, 2022 and 3.0 years at both September 30, 2021 and December 31, 2021. The weighted average beta of the equity portfolio was 1.01 at September 30, 2022 and was 1.04 at both September 30, 2021 and December 31, 2021. We have not experienced a material impact when compared to the tabular presentations of our interest rate and market risk sensitive instruments in our Annual Report on Form 10-K for the year ended December 31, 2021.

Item 4. Controls and Procedures.

We, under the direction of our Chief Executive Officer and our Chief Financial Officer, have established disclosure controls and procedures that are designed to ensure that information required to be disclosed by us in the reports that we file or submit under the Securities Exchange Act of 1934 is recorded, processed, summarized, and reported within the time periods specified in the Securities and Exchange Commission’s rules and forms. The disclosure controls and procedures are also intended to ensure that such information is accumulated and communicated to our management, including the Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosures.

Our Chief Executive Officer and our Chief Financial Officer reviewed and evaluated our disclosure controls and procedures as of the end of the period covered by this report. Based on that review and evaluation, the Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures are effectively serving the stated purposes as of the end of the period covered by this report.

There have not been any changes in our internal control over financial reporting during our most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

58

PART II—OTHER INFORMATION

Item 1A. Risk Factors.

There have been no material changes in the risk factors from those discussed in Item 1A, Risk Factors included in our Annual Report on Form 10-K for the year ended December 31, 2021.

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

(c) Share Repurchases

 

ISSUER PURCHASES OF EQUITY SECURITIES
2022 Calendar Month	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	166,617	$	111.66	167,786	24,832,214
August	221,315	125.89		389,101	24,610,899
September	21,080	121.28		410,181	24,589,819
Total	409,012	$	119.86

In May 2022, the Board of Directors approved an authorization for the Company to repurchase up to 25 million of its common shares. This authorization does not have an expiration date. Share repurchases under this authorization may be accomplished through open market purchases, including trading plans entered into with one or more brokerage firms in accordance with Rule 10b5-1 under the Securities Exchange Act of 1934, through privately negotiated transactions, pursuant to our equity incentive awards, or otherwise. During the third quarter 2022, all repurchases were accomplished in conjunction with our equity incentive awards or through the open market at the then-current market prices.

Progressive’s financial policies state that we will repurchase shares to neutralize dilution from equity-based compensation in the year of issuance and as an option to effectively use under-leveraged capital.

Item 5. Other Information.

President and CEO Susan Patricia Griffith’s quarterly letter to shareholders is included as Exhibit 99 to this Quarterly Report on Form 10-Q.

Item 6. Exhibits.

See exhibit index beginning on page 61.

59

SIGNATURES

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

		THE PROGRESSIVE CORPORATION
		(Registrant)
Date:	November 1, 2022	By: /s/ John P. Sauerland
		John P. Sauerland
		Vice President and Chief Financial Officer

60

EXHIBIT INDEX
Exhibit No. Under Reg. S-K, Item 601	Form 10-Q Exhibit Number	Description of Exhibit	If Incorporated by Reference, Documents with Which Exhibit was Previously Filed with SEC
31	31.1	Rule 13a-14(a)/15d-14(a) Certification of the Principal Executive Officer, Susan Patricia Griffith	Filed herewith
31	31.2	Rule 13a-14(a)/15d-14(a) Certification of the Principal Financial Officer, John P. Sauerland	Filed herewith
32	32.1	Section 1350 Certification of the Principal Executive Officer, Susan Patricia Griffith	Furnished herewith
32	32.2	Section 1350 Certification of the Principal Financial Officer, John P. Sauerland	Furnished herewith
99	99	Letter to Shareholders from Susan Patricia Griffith, President and Chief Executive Officer (Regulation FD Disclosure)	Furnished herewith
101	101.INS	XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document	Filed herewith
101	101.SCH	Inline XBRL Taxonomy Extension Schema Document	Filed herewith
101	101.CAL	Inline XBRL Taxonomy Extension Calculation Linkbase Document	Filed herewith
101	101.DEF	Inline XBRL Taxonomy Extension Definition Linkbase Document	Filed herewith
101	101.LAB	Inline XBRL Taxonomy Extension Label Linkbase Document	Filed herewith
101	101.PRE	Inline XBRL Taxonomy Extension Presentation Linkbase Document	Filed herewith
104	104	Cover Page Interactive Data File (the cover page tags are embedded within the Inline XBRL document)	Filed herewith

61

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Susan Patricia Griffith, certify that:

1.    I have reviewed this quarterly report on Form 10-Q of The Progressive 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: November 1, 2022                 

/s/ Susan Patricia Griffith

                            Susan Patricia Griffith

                            President and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION

I, John P. Sauerland, certify that:

1.    I have reviewed this quarterly report on Form 10-Q of The Progressive 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: November 1, 2022

/s/ John P. Sauerland

                            John P. Sauerland

                            Vice President and Chief Financial Officer

EX-32.1

Exhibit 32.1

SECTION 1350 CERTIFICATION

    I, Susan Patricia Griffith, President and Chief Executive Officer of The Progressive Corporation (the “Company”), certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350, that:

(1) the Quarterly Report on Form 10-Q of the Company for the period ended September 30, 2022 (the “Report”), which this certification accompanies, fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)); and

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

/s/ Susan Patricia Griffith

Susan Patricia Griffith

President and Chief Executive Officer

November 1, 2022

EX-32.2

Exhibit 32.2

SECTION 1350 CERTIFICATION

    I, John P. Sauerland, Chief Financial Officer of The Progressive Corporation (the “Company”), certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350, that:

(1) the Quarterly Report on Form 10-Q of the Company for the period ended September 30, 2022 (the “Report”), which this certification accompanies, fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)); and

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

/s/ John P. Sauerland

John P. Sauerland

Vice President and Chief Financial Officer

November 1, 2022

EX-99

Exhibit 99

Letter to Shareholders

Third Quarter 2022

The third quarter was looking terrific on so many levels until Hurricane Ian entered the scene during the last few days of September. What otherwise would have been a relatively calm month quickly became anything but that. We rapidly initiated our catastrophe response plan, which we have used and improved over many years, and worked tirelessly to take a horrific situation for our impacted customers and employees and turn it into an opportunity to show how much we truly care about them.

Throughout this letter, I will share just a few of the many stories that I’ve received to help bring our culture and this event to life.

Tanya, who is a new employee in our Spanish speaking customer services group, was able to experience first-hand what we are all about as she began onboarding into the Progressive family.

I have not been with Progressive long. I am still training with Seguros. I just wanted to mention that I have never been taken care by a company that goes so far to help and serve. It is the first hurricane I experienced since arriving here 2-years ago from Chicago. My coaches and trainers were so diligent and concerned for those that were stationed in Florida. My Supervisor and Human Resource checked in on me to see how I as well as my family were doing (I even received an automated call from Progressive to make sure if I needed assistance!). Progressive offered me an alternate work location at their office! That is just one part of the amazing company I work for. The training and coaching have been absolutely amazing. The assistance I receive and how it was delivered in such a positive way is mind blowing to me! I would like to thank Progressive and this amazing group of people. Thank you to all that made it happen. I am truly BLESSED!!

Bryn, a claim representative working in the Insurance Village shared this story.

Yesterday at the Insurance Village I had a father and daughter walk into the village. The daughter was our policyholder, and her father was there for support. The daughter brought pictures showing a power line down on her house from a fence falling on her house, her roof was mostly gone, and her siding was almost entirely gone from the winds. The insured evacuated with her two kids to her father’s house during the storm and was just now able to get back into the property. We sat and talked for about 45 minutes about her loss and her home, her father expressed how thankful he was for us to just sit and listen.

We offered the insured some snacks and water which she happily accepted and asked for a few extra bags of pretzels as she lost all of her food and was hungry. She had a bag with her from one of our vendors and we told her to fill it up and take as much as she wanted. She expressed numerous times how she was struggling to feed her family and was unable to restock her groceries. We then offered the insured a small advance on her loss which would help her restock her fridge at which time she became visually emotional and thanked us numerous times. Her father thanked us over and over and stated we just set a very high bar and he asked how he could reach out to Progressive to purchase a policy.

Now, onto the numbers. We ended the third quarter 2022 with 5% net premiums written (NPW) growth at a combined ratio (CR) of 99.2, bringing year-to-date (YTD) NPW growth to 8% at a 96.5 CR, which is slightly over our stated goal of 96. Our catastrophe losses, which reflect reinsurance and exclude loss adjusting expenses, were 7.1 points and 4.3 points for the quarter and YTD, respectively, with Hurricane Ian being the biggest contributor to the losses.

During the quarter, Personal Lines grew NPW by 9% and ended the quarter with 17.4 million personal auto policies in force and 5.6 million special lines policies in force. Personal Lines had a 100 CR for the quarter, with about 3 points due to underwriting losses in our special lines products. While our quarterly personal auto CR was about 1 point above our 96 target, it included about 3.2 points related to Hurricane Ian, which made multiple landfalls during the quarter. Excluding the catastrophe losses from Ian, we were achieving our profit target margins as we benefited from our prior period rate increases earning in.

1

While we don’t normally comment on our special lines products separately, I thought that it would be prudent to do so this quarter based on the impact that Hurricane Ian had on these products. For the quarter, we estimate the catastrophe losses from Ian to be about $290 million for our special lines products, with boat losses accounting for nearly 60% of the total. We mitigate our hurricane/coastal exposure on these products with underwriting restrictions limiting boat length and value, compared to non-hurricane exposed areas, and have increased deductibles for named storms. In addition, to help our special lines customers, we also offer hurricane “haul out” coverage to encourage the removal of watercraft from the water prior to the arrival of a storm.

Excluding the impact of the catastrophe losses, our underlying average loss costs continue to increase due to higher severity, which reflects general economic inflation, and despite calendar-year frequency becoming more stable quarter to quarter and running below pre-pandemic levels. Our product management teams continue to manage rate level to respond to these factors. During the third quarter, we raised rates in 20 states, which represented an average increase of about 2% on a countrywide basis. Year to date, we have increased rates nearly 12% countrywide and continue to closely monitor frequency and severity trends to ensure we stay focused on our stated goal of profitable growth.

As our non-catastrophe personal auto profitability improved, we shifted focus in the quarter to evaluating underwriting restrictions, bill plans, and media spend to identify growth opportunities. During the third quarter, quoting increased more than 20% in both channels and total auto new business applications grew 20%. As competitors report higher than expected combined ratios and announced tactics to address these issues, they are filing rate increases in many states that improved our competitive positioning, which we believe is evidenced in our new business application growth.

Total auto policies in force declined 1%, compared to the end of the third quarter last year. When compared to the end of June 2022, total auto policies in force increased by nearly 250,000 policies. By channel, we experienced positive policy in force growth in Direct on a year-over-year basis and our Agency channel continued to show signs of slowing the rate of decline. We also experienced signs of improved renewal retention during the quarter as customers renewing policies in recent months are seeing rate increases that are less than those who renewed earlier in the year.

We elevated our newest personal auto product model 8.8 in June 2022 and at the end of the third quarter six states were in market which represented 11% of our countrywide premium. Early results show improvement in conversion of new business quotes to customers. As of September month end, 25 states are in market on model 8.7, which represented nearly 60% of our countrywide premium with improvements in conversion consistently higher across most segments.

In Commercial Lines, during the third quarter, our CR of 89.7 remained below target, while NPW declined 13%. The decrease in premium primarily reflects the timing of renewal events for certain transportation network company (TNC) policies on a year-over-year basis and a shift in the length of the policy terms. During October 2022, we renewed certain TNC policies that were previously renewed in September 2021. During the first quarter 2022, we renewed certain TNC policies on a 12-month basis that were previously written on a six-month basis and, therefore, had renewed in prior years during the third quarter. As a result, the first quarter Commercial Lines premiums written were positively impacted, while the third quarter 2022 premium growth experienced an unfavorable impact. Adjusting for these known variations, our total Commercial Lines NPW would have been up about 2% for the third quarter 2022.

Our Commercial Lines business experienced minimal impact from Hurricane Ian. This is not unusual for our commercial auto business for several reasons. For this product, physical damage, and in particular comprehensive coverage, is a much smaller part of our premium. Not all of our customers choose physical damage coverage and, as a result, many customers move their vehicles out of the path of the storm to protect the vehicle and ultimately their business. We also find that commercial vehicles don’t tend to be garaged close to the coastline where storm impact can be more severe.

As noted last quarter, we are seeing growth headwinds in our Commercial Lines business. Premiums written in our for-hire transportation business market target (BMT) are down for the quarter, given both the slowdown in the overall rate of economic activity and growth in this business during 2021. While we are seeing a reduction in shopping across our primary BMTs, renewal business premium growth is still positive and total policies in force are up 9% year over year.

2

We continue to invest in our business to improve experiences, advance our pricing and segmentation, and expand our product offerings. During the third quarter, we rolled out our 8.0 commercial auto product along with our new policy administration system in three additional states. At the end of the quarter, we had 33 states on our new system, representing 80% of commercial auto premium and more than 60% of commercial auto policies in force. We’ve continued to grow our usage-based insurance business and between our two programs – Smart Haul® and Snapshot ProView® – collectively, our premiums are up 5% in the quarter and 20% year to date. We are pleased with our leadership position and the traction we are getting with our Commercial Lines usage-based programs. These programs allow us to understand specific differences in driving behaviors across various business classes and relate them to loss behaviors. This ultimately enables us to provide better rates in the form of discounts to more customers.

Product expansion efforts continue on two fronts. As of quarter end, our business owners policy (BOP) product was in 37 states, and we have more than doubled our agent footprint in the last year. Ongoing focus on underwriting innovation and efficiencies have allowed us to expand our appetite to meet agent and customer needs while still mitigating risk. By the end of the quarter, we have increased to nearly 70% the number of our BOP policies that are being sold without an underwriting review. We also successfully elevated Heavy Truck Roadside Assistance in seven additional states during the third quarter. At quarter end, this coverage was available in 18 states where 30% of eligible preferred truck customers have selected the coverage at new business.

Property NPW were up 3% in the quarter and 8% YTD. For the third quarter of 2022, our total Property combined ratio was 125.1. In the third quarter, we had 16 weather events, of which Hurricane Ian was the only named storm. Our current estimate of Ian’s ultimate loss and allocated loss adjustment expenses for our Property business is $1.4 billion on a direct basis. However, we heavily reinsure our catastrophe exposure in our Property business and, as such, we retained only $200 million of loss and allocated loss adjustment expenses from Hurricane Ian, which is about 36 points on the quarter’s Property CR.

From a growth perspective, on a year-over-year basis, Property policies in force grew 4%, which is slowing from the previous quarter’s 6%. This slowdown was expected as we continued to limit our growth and exposure in catastrophe exposed states and shifted our mix of business towards less volatile geographic regions. We are seeing progress in 2022 on this multiyear goal to reduce our geographic concentration. We are also continuing efforts in cost-sharing initiatives and improved pricing to market. Through the end of the third quarter 2022, we have rolled out to 41 states our 4.0 or 4.1 product model and we are seeing an increase in competitiveness in newer homes, newer roofs, and older homes with recently replaced roofs.

The third quarter total return on our investment portfolio was -1.9%, as the early quarter optimism of an economic soft landing faded by September as monetary policy remained very aggressive. Our fixed-income portfolio returned -1.8% in the third quarter as inflation concerns drove higher interest rates and wider credit spreads. The combination of geopolitical and inflation risks has led to significant volatility across financial markets. Our equity portfolio returned -4.5% in the third quarter as the increased probability of an economic recession has lowered corporate earnings expectations. We expect the current uncertainty to eventually lead to interesting investment opportunities for our portfolio, but currently we are continuing to maintain a very conservative investment posture.

It’s been incredible to watch the partnership between the National Catastrophe Response Team, Property Catastrophe, and several other departments who assisted with our response to Hurricane Ian. Our customers are sharing their appreciation for those employees who helped them after the storm. So far, the Hurricane Ian response is showing us what’s possible when we align on being the very best at taking care of customers.

In our customer relationship management group alone, over 200 of our employees signed up to work in a different workgroup than their assigned function to aide those other areas. In addition, over 1,000 of our employees picked up extra hours every day as the storm unfolded to assist both their peers and our customers. Our real estate team jumped into action, partnering with claims and human resources to distribute gas, bottled water, non-perishable food, cleaning supplies, and toiletries out of our Fort Myers Claims Office. And, of course, the catastrophe teams continue to work tirelessly to take care of our customers in their greatest time of need.

Below are a couple more amazing stories that people have shared with me that I am in turn sharing to give you a greater sense of the lengths that our employees go in order to do the right thing.

3

As the remnants of Hurricane Ian were causing distress across North Carolina, Pam a CRM Services Consultant, was resolute in finding a way to continue providing exceptional customer service. In braving the weather and using her car to charge her technology, Pam made multiple trips into the elements to ensure she was available and didn’t miss her shift. #ProgressiveStrong

Alan is a Progressive employee who was personally impacted by Hurricane Ian and shared the following story with us.

A little over a week ago my family experienced an unexpected loss and the support I received from my manager and Progressive family was so uplifting that I felt compelled to share it with you. We were in an area that lost power due to Hurricane Ian. During the outage a burner on our oven was switched on. When power was restored the burner caused a fire in our home and the fire caused a water line to burst. Between fire, water, and smoke damage everything we owned was unusable.

I relayed the situation to my manager, Kristie, and the response was immediately what can I do to help, what do you need? Instead of asking when I would be back in the office, she asked me what I would like her to cover for me while I was away. Not once did I feel pressured to return to work while figuring out how to start putting my life back together. Because of that I was able to move quickly with adjusters to start work on my home and locate a place for me, my wife, our three children and the dog to stay. That in and of itself would have been enough and is what I would expect from a great company.

The Monday after the fire, Kristie’s boss, Jim reached out and asked if I was comfortable with him sharing what happened with others. I told him I was ok with it. What happened next is why I’m taking the time to write you. The outpouring of love and support I received was on par with what I would expect from close friends and relatives. Leaders and coworkers throughout the organization offered words of encouragement, furniture, gift cards, places to stay, clothing and financial assistance. There was genuine concern for the well-being of my family including our pets. My peers rallied around me and acted more like a community than a group of coworkers. They treated me like a neighbor in need instead of someone they “know from the office.” That type of environment is hard to foster and doesn’t happen by mistake. In my 10 years here, I’ve had plenty of positive experiences to show me why this is the right place for me but none of them can hold a candle to this one. Because of the support from the Progressive community, my family and I were able to take the time needed to process our loss, quickly secure a home to rent for the next 6-12 months, purchase the basics to set up the home and see light at the end of the tunnel.

To our employees, there is not much more to say than thanks for all that you do every day to make Progressive such a special place.

/s/ Tricia Griffith

Tricia Griffith

President and Chief Executive Officer

4

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Consolidated Statements of Comprehensive Income - USD ($) shares in Millions, $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenues
Net premiums earned		$ 12,398.9	$ 11,364.8	$ 36,349.7	$ 32,767.3
Investment income		333.6	208.9	868.2	639.8
Net realized gains (losses) on securities:
Net realized gains (losses) on security sales		(62.1)	53.9	430.0	607.8
Net holding period gains (losses) on securities		(152.1)	(15.9)	(2,262.9)	479.8
Net impairment losses recognized in earnings		(2.2)	(1.2)	(6.5)	(3.7)
Total net realized gains (losses) on securities		(216.4)	36.8	(1,839.4)	1,083.9
Fees and other revenues		181.4	174.9	531.9	516.8
Service revenues		82.7	73.8	230.5	202.1
Total revenues		12,780.2	11,859.2	36,140.9	35,209.9
Expenses
Losses and loss adjustment expenses		10,018.7	9,250.7	28,298.2	24,767.6
Policy acquisition costs		970.9	951.5	2,867.9	2,754.7
Other underwriting expenses		1,496.4	1,384.4	4,433.9	4,306.0
Investment expenses		5.8	6.6	17.4	18.5
Service expenses		82.8	72.8	221.5	190.0
Interest expense		63.1	54.2	180.4	167.0
Goodwill impairment	[1]	0.0	0.0	224.8	0.0
Total expenses		12,637.7	11,720.2	36,244.1	32,203.8
Net Income (Loss)
Income (loss) before income taxes		142.5	139.0	(103.2)	3,006.1
Provision for income taxes		18.4	20.5	1.7	617.5
Net income (loss)		124.1	118.5	(104.9)	2,388.6
Other Comprehensive Income (Loss)
Total net unrealized gains (losses) on fixed-maturity securities		(920.3)	(129.8)	(3,170.0)	(578.3)
Net unrealized losses on forecasted transactions		0.1	0.1	0.3	0.6
Foreign currency translation adjustment		(0.7)	(0.2)	(0.9)	(0.7)
Other comprehensive income (loss)		(920.9)	(129.9)	(3,170.6)	(578.4)
Comprehensive income (loss)		(796.8)	(11.4)	(3,275.5)	1,810.2
Computation of Earnings Per Common Share
Net income (loss)		124.1	118.5	(104.9)	2,388.6
Less: Preferred share dividends		6.7	6.7	20.1	20.1
Net income (loss) available to common shareholders		$ 117.4	$ 111.8	$ (125.0)	$ 2,368.5
Average common shares outstanding - Basic		584.5	584.7	584.4	584.7
Net effect of dilutive stock-based compensation		2.6	2.4	2.7	2.6
Total average equivalent common shares - Diluted		587.1	587.1	587.1	587.3
Basic: Earnings per common share		$ 0.20	$ 0.19	$ (0.21)	$ 4.05
Diluted: Earnings per common share		$ 0.20	$ 0.19	$ (0.21)	$ 4.03

[1] See Note 12 – Goodwill and Intangible Assets for further discussion.

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Consolidated Balance Sheets - USD ($) $ in Millions		Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Assets
Fixed maturities (amortized cost: $48,205.7, $44,556.0, and $43,794.2)		$ 44,173.1	$ 43,873.1	$ 45,045.7
Short-term investments (amortized cost: $4,237.6, $1,088.7, and $942.6)		4,237.6	942.6	1,088.7
Total available-for-sale securities		48,410.7	44,815.7	46,134.4
Nonredeemable preferred stocks (cost: $1,417.6, $1,479.9, and $1,571.8)		1,254.4	1,639.9	1,572.8
Common equities (cost: $803.7, $1,238.4, and $1,264.1)		2,665.3	5,058.5	4,580.2
Total equity securities		3,919.7	6,698.4	6,153.0
Total investments		52,330.4	51,514.1	52,287.4
Cash and cash equivalents		350.9	187.1	270.6
Restricted cash and cash equivalents		14.4	15.0	14.9
Total cash, cash equivalents, restricted cash, and restricted cash equivalents		365.3	202.1	285.5
Accrued investment income		217.4	181.7	168.6
Premiums receivable, net of allowance for credit losses of $295.0, $257.3, and $280.4		10,867.7	9,399.5	10,246.7
Reinsurance recoverables		6,306.8	4,980.5	5,044.9
Prepaid reinsurance premiums		367.5	457.6	661.1
Deferred acquisition costs		1,585.2	1,355.6	1,430.7
Property and equipment, net of accumulated depreciation of $1,499.0, $1,422.2, and $1,407.4		1,067.1	1,137.3	1,161.0
Goodwill		227.9	452.7	452.7
Intangible assets, net of accumulated amortization of $153.1, $369.2, and $383.8		91.8	117.3	131.9
Net federal deferred income taxes		1,269.5	0.0	0.0
Other assets		827.6	1,333.9	747.6
Total assets		75,524.2	71,132.3	72,618.1
Liabilities
Unearned premiums		17,796.9	15,615.8	16,671.4
Loss and loss adjustment expense reserves		30,631.8	26,164.1	25,926.3
Net federal deferred income taxes		0.0	152.9	110.7
Accounts payable, accrued expenses, and other liabilities		5,931.9	6,069.1	6,453.4
Debt	[1]	6,387.4	4,898.8	4,898.2
Total liabilities		60,748.0	52,900.7	54,060.0
Shareholders' Equity
Serial Preferred Shares, Series B, no par value (cumulative, liquidation preference $1,000 per share) (authorized, issued, and outstanding 0.5)		493.9	493.9	493.9
Common shares, $1.00 par value (authorized 900.0; issued 797.6, including treasury shares of 212.5, 212.6, and 213.2)		585.1	584.4	585.0
Paid-in capital		1,839.6	1,772.9	1,735.9
Retained earnings		14,987.5	15,339.7	15,390.0
Accumulated other comprehensive income (loss):
Net unrealized gains (losses) on fixed-maturity securities		(3,113.8)	56.2	369.0
Net unrealized losses on forecasted transactions		(14.6)	(14.9)	(15.0)
Foreign currency translation adjustment		(1.5)	(0.6)	(0.7)
Total accumulated other comprehensive income (loss)		(3,129.9)	40.7	353.3
Total shareholders’ equity		14,776.2	18,231.6	18,558.1
Total liabilities and shareholders’ equity		$ 75,524.2	$ 71,132.3	$ 72,618.1

[1] Consists of long-term debt. See Note 4 – Debt for further discussion.

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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Fixed maturities, amortized cost	$ 48,205.7	$ 43,794.2	$ 44,556.0
Short-term investments, amortized cost	4,237.6	942.6	1,088.7
Nonredeemable preferred stocks, cost	1,417.6	1,571.8	1,479.9
Common equities, cost	803.7	1,264.1	1,238.4
Premium Receivable, Allowance for Credit Loss	295.0	280.4	257.3
Property and equipment, accumulated depreciation	1,499.0	1,407.4	1,422.2
Intangible Assets, Accumulated Amortization	$ 153.1	$ 383.8	$ 369.2
Common Shares, par value (USD per share)	$ 1.00	$ 1.00	$ 1.00
Common Shares, authorized (shares)	900,000,000.0	900,000,000.0	900,000,000.0
Common Shares, issued (shares)	797,600,000	797,600,000	797,600,000
Common Shares, treasury shares (shares)	212,500,000	213,200,000	212,600,000
Serial Preferred Stock
Preferred Stock, Shares Authorized (shares)	20,000,000.0	20,000,000.0	20,000,000.0
Series B Preferred Stock | Serial Preferred Stock
Preferred Stock, No Par Value	$ 0	$ 0	$ 0
Preferred Stock, Liquidation Preference Per Share (USD per share)	$ 1,000	$ 1,000	$ 1,000
Preferred Stock, Shares Authorized (shares)	500,000	500,000	500,000
Preferred Stock, Shares Issued (shares)	500,000	500,000	500,000
Preferred Stock, Shares Outstanding (shares)	500,000	500,000	500,000

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Consolidated Statements of Changes in Shareholders' Equity Statement - USD ($) $ in Millions	Total	Serial Preferred Stock	Preferred Shares, No Par Value	Common Shares, $1.00 Par Value	Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Series B Preferred Stock Serial Preferred Stock	Voting Preference Shares
Common Stock, Dividends, Per Share, Declared	$ 0.30
Preferred Stock, Dividends Per Share, Declared								$ 26.875
Balance, Beginning of period at Dec. 31, 2020			$ 493.9	$ 585.2	$ 1,672.9	$ 13,354.9	$ 931.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 2,388.6					2,388.6
Treasury shares purchased				(1.8)	(5.3)	(160.1)
Cash dividends declared on common shares ($0.10, $0.10, $0.30, and $0.30 per share)						(175.2)
Cash dividends declared on Serial Preferred Shares, Series B ($26.875, $26.875, $26.875, and $26.875 per share)						(13.4)
Reinvested dividends on restricted stock units					1.2	(1.2)
Net restricted equity awards issued/vested				1.6	(1.6)
Amortization of equity-based compensation					68.7
Other comprehensive income (loss)	(578.4)						(578.4)
Other, net						(3.6)
Balance, End of period at Sep. 30, 2021	$ 18,558.1		493.9	585.0	1,735.9	15,390.0	353.3
Common Stock, Dividends, Per Share, Declared	$ 0.10
Preferred Stock, Dividends Per Share, Declared								26.875
Balance, Beginning of period at Jun. 30, 2021			493.9	585.2	1,712.3	15,401.0	483.2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 118.5					118.5
Treasury shares purchased				(0.7)	(2.3)	(68.8)
Cash dividends declared on common shares ($0.10, $0.10, $0.30, and $0.30 per share)						(58.4)
Cash dividends declared on Serial Preferred Shares, Series B ($26.875, $26.875, $26.875, and $26.875 per share)						(13.4)
Reinvested dividends on restricted stock units					0.4	(0.4)
Net restricted equity awards issued/vested				0.5	(0.5)
Amortization of equity-based compensation					26.0
Other comprehensive income (loss)	(129.9)						(129.9)
Other, net						11.5
Balance, End of period at Sep. 30, 2021	$ 18,558.1		493.9	585.0	1,735.9	15,390.0	353.3
Preferred Stock, No Par Value								$ 0
Common Shares, par value (USD per share)	$ 1.00
Preferred Stock, Shares Authorized (shares)		20,000,000.0						500,000	5,000,000.0
Preferred Stock, Shares Issued (shares)								500,000	0
Preferred Stock, No Par Value								$ 0
Common Shares, par value (USD per share)	1.00
Preferred Stock, Shares Authorized (shares)		20,000,000.0						500,000
Preferred Stock, Shares Issued (shares)								500,000
Common Stock, Dividends, Per Share, Declared	$ 0.30
Preferred Stock, Dividends Per Share, Declared								$ 26.875
Balance, Beginning of period at Dec. 31, 2021	$ 18,231.6		493.9	584.4	1,772.9	15,339.7	40.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(104.9)					(104.9)
Treasury shares purchased				(0.7)	(2.2)	(75.7)
Cash dividends declared on common shares ($0.10, $0.10, $0.30, and $0.30 per share)						(175.2)
Cash dividends declared on Serial Preferred Shares, Series B ($26.875, $26.875, $26.875, and $26.875 per share)						(13.4)
Reinvested dividends on restricted stock units					0.6	(0.6)
Net restricted equity awards issued/vested				1.4	(1.4)
Amortization of equity-based compensation					69.7
Other comprehensive income (loss)	(3,170.6)						(3,170.6)
Other, net						17.6
Balance, End of period at Sep. 30, 2022	$ 14,776.2		493.9	585.1	1,839.6	14,987.5	(3,129.9)
Common Stock, Dividends, Per Share, Declared	$ 0.10
Preferred Stock, Dividends Per Share, Declared								26.875
Balance, Beginning of period at Jun. 30, 2022			493.9	584.9	1,815.2	14,967.7	(2,209.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 124.1					124.1
Treasury shares purchased				(0.4)	(1.3)	(47.4)
Cash dividends declared on common shares ($0.10, $0.10, $0.30, and $0.30 per share)						(58.4)
Cash dividends declared on Serial Preferred Shares, Series B ($26.875, $26.875, $26.875, and $26.875 per share)						(13.4)
Reinvested dividends on restricted stock units					0.3	(0.3)
Net restricted equity awards issued/vested				0.6	(0.6)
Amortization of equity-based compensation					26.0
Other comprehensive income (loss)	(920.9)						(920.9)
Other, net						15.2
Balance, End of period at Sep. 30, 2022	$ 14,776.2		$ 493.9	$ 585.1	$ 1,839.6	$ 14,987.5	$ (3,129.9)
Preferred Stock, No Par Value								$ 0
Common Shares, par value (USD per share)	$ 1.00
Preferred Stock, Shares Authorized (shares)		20,000,000.0						500,000	5,000,000.0
Preferred Stock, Shares Issued (shares)								500,000	0

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Consolidated Statements of Cash Flows - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021
Cash Flows From Operating Activities
Net income (loss)		$ (104.9)	$ 2,388.6
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation		227.5	203.9
Amortization of intangible assets		25.5	43.1
Net amortization of fixed-income securities		1.6	97.2
Amortization of equity-based compensation		69.7	68.7
Net realized (gains) losses on securities		1,839.4	(1,083.9)
Net (gains) losses on disposition of property and equipment		5.3	(4.0)
Goodwill impairment	[1]	224.8	0.0
Changes in:
Premiums receivable		(1,468.2)	(1,994.0)
Reinsurance recoverables		(1,326.3)	(573.1)
Prepaid reinsurance premiums		90.1	(278.4)
Deferred acquisition costs		(229.6)	(193.5)
Income taxes		(591.6)	(156.2)
Unearned premiums		2,181.1	3,167.0
Loss and loss adjustment expense reserves		4,467.7	4,511.7
Accounts payable, accrued expenses, and other liabilities		546.5	1,033.0
Other, net		(39.4)	79.5
Net cash provided by operating activities		5,919.2	7,309.6
Purchases:
Fixed maturities		(18,672.7)	(25,222.2)
Equity securities		(126.5)	(464.9)
Sales:
Fixed maturities		9,737.6	11,747.1
Equity securities		1,467.0	625.2
Maturities, paydowns, calls, and other:
Fixed maturities		4,158.5	5,545.5
Equity securities		39.3	119.1
Net (purchases) sales of short-term investments		(3,266.6)	4,209.3
Net unsettled security transactions		(68.7)	304.2
Acquisition of Protective Insurance Corporation, net of cash, cash equivalents, and restricted cash equivalents acquired		0.0	(313.2)
Purchases of property and equipment		(245.0)	(188.3)
Sales of property and equipment		16.0	63.1
Net cash used in investing activities		(6,961.1)	(3,575.1)
Cash Flows From Financing Activities
Dividends paid to common shareholders		(175.5)	(2,811.5)
Dividends paid to preferred shareholders		(26.8)	(26.8)
Acquisition of treasury shares for restricted stock tax liabilities		(76.2)	(66.9)
Acquisition of treasury shares acquired in open market		(2.4)	(100.3)
Net proceeds from debt issuances		1,486.0	0.0
Payment of acquired company debt		0.0	(20.0)
Payments of debt		0.0	(500.0)
Net cash provided by (used in) financing activities		1,205.1	(3,525.5)
Increase in cash, cash equivalents, restricted cash, and restricted cash equivalents		163.2	209.0
Cash, cash equivalents, restricted cash, and restricted cash equivalents – January 1		202.1	76.5
Cash, cash equivalents, restricted cash, and restricted cash equivalents – September 30		$ 365.3	$ 285.5

[1] See Note 12 – Goodwill and Intangible Assets for further discussion.

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Basis of Presentation

9 Months Ended

Sep. 30, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

Basis of Presentation — The accompanying consolidated financial statements include the accounts of The Progressive Corporation, our wholly owned insurance and non-insurance subsidiaries, and affiliates in which we have a controlling financial interest (Progressive).

The consolidated financial statements reflect all normal recurring adjustments that, in the opinion of management, were necessary for a fair statement of the results for the interim periods presented. The results of operations for the period ended September 30, 2022, are not necessarily indicative of the results expected for the full year. These consolidated financial statements and the notes thereto should be read in conjunction with Progressive’s audited financial statements and accompanying notes included in Exhibit 13 to our Annual Report on Form 10-K for the year ended December 31, 2021 (2021 Annual Report to Shareholders).

Insurance Premiums and Receivables

We perform analyses to evaluate our premiums receivable for expected credit losses. See the 2021 Annual Report to Shareholders for a discussion on our premiums receivable allowance for credit loss policy. The following table summarizes changes in our allowance for credit loss exposure on our premiums receivable:

	Three Months Ended September 30,				Nine Months Ended September 30,
(millions)	2022		2021		2022		2021
Allowance for credit losses, beginning of period	$	265.8	$	245.2	$	280.4	$	356.2
Allowance acquired during period1	0		0		0		3.5
Increase in allowance2	130.9		107.2		320.6		255.5
Write-offs3	(101.7)		(95.1)		(306.0)		(357.9)
Allowance for credit losses, end of period	$	295.0	$	257.3	$	295.0	$	257.3

1 Represents the amount of the allowance acquired in the Protective Insurance Corporation and subsidiaries (Protective Insurance) acquisition.

2 Represents the incremental increase in other underwriting expenses.

3 Represents portion of allowance that is reversed when premiums receivable are written off. Premiums receivable balances are written off once we have exhausted our collection efforts.

Property and Equipment

Other assets on the consolidated balance sheets include certain long-lived assets that are considered “held for sale.” The carrying value of these held-for-sale assets was $47.4 million at September 30, 2022, $12.6 million at September 30, 2021, and $10.8 million at December 31, 2021.

Goodwill and Intangible Assets

We evaluate goodwill for impairment using a qualitative or quantitative approach annually and when changes in circumstances indicate the carrying value of certain portions of goodwill may not be recoverable. See Note 12 – Goodwill and Intangible Assets for further discussion.

Earnings per Common Share

When a net loss is reported, earnings per common share are calculated using basic average equivalent shares since diluted earnings per share would be antidilutive given the net loss reported for the period. Amounts are reported on a diluted basis for all other periods presented.

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Investments

9 Months Ended

Sep. 30, 2022

Investments, Debt and Equity Securities [Abstract]

Investments

Investments — The following tables present the composition of our investment portfolio by major security type. Our securities are reported in our consolidated balance sheets at fair value. The changes in fair value for our fixed-maturity securities (other than hybrid securities) are reported as a component of accumulated other comprehensive income (loss), net of deferred income taxes, in our consolidated balance sheets. The net holding period gains (losses) reported below represent the inception-to-date changes in fair value of the securities. The changes in the net holding period gains (losses) between periods for the hybrid securities and equity securities are recorded as a component of net realized gains (losses) on securities in our consolidated statements of comprehensive income.

($ in millions)	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Net Holding Period Gains (Losses)		Fair Value		% of Total Fair Value
September 30, 2022
Available-for-sale securities:
Fixed maturities:
U.S. government obligations	$	24,260.9	$	0	$	(1,855.4)	$	0	$	22,405.5	42.8	%
State and local government obligations	2,140.9		0		(215.4)		0		1,925.5		3.7
Foreign government obligations	16.7		0		(1.4)		0		15.3		0.1
Corporate debt securities	10,119.8		0		(832.5)		(58.9)		9,228.4		17.6
Residential mortgage-backed securities	754.2		0.4		(16.5)		(15.1)		723.0		1.4
Commercial mortgage-backed securities	5,833.9		1.4		(747.4)		0		5,087.9		9.7
Other asset-backed securities	4,876.7		0		(268.9)		(1.9)		4,605.9		8.8
Redeemable preferred stocks	202.6		0		(5.6)		(15.4)		181.6		0.3
Total fixed maturities	48,205.7		1.8		(3,943.1)		(91.3)		44,173.1		84.4
Short-term investments	4,237.6		0		0		0		4,237.6		8.1
Total available-for-sale securities	52,443.3		1.8		(3,943.1)		(91.3)		48,410.7		92.5
Equity securities:
Nonredeemable preferred stocks	1,417.6		0		0		(163.2)		1,254.4		2.4
Common equities	803.7		0		0		1,861.6		2,665.3		5.1
Total equity securities	2,221.3		0		0		1,698.4		3,919.7		7.5
Total portfolio1	$	54,664.6	$	1.8	$	(3,943.1)	$	1,607.1	$	52,330.4	100.0	%

($ in millions)	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Net Holding Period Gains (Losses)		Fair Value		% of Total Fair Value
September 30, 2021
Available-for-sale securities:
Fixed maturities:
U.S. government obligations	$	21,093.1	$	144.9	$	(95.9)	$	0	$	21,142.1	40.3	%
State and local government obligations	2,123.8		48.8		(6.7)		0		2,165.9		4.1
Foreign government obligations	12.3		0		0		0		12.3		0.1
Corporate debt securities	10,556.4		314.6		(10.5)		1.2		10,861.7		20.7
Residential mortgage-backed securities	624.4		3.4		(0.9)		1.0		627.9		1.2
Commercial mortgage-backed securities	5,739.4		70.2		(20.6)		0		5,789.0		11.1
Other asset-backed securities	4,235.6		29.4		(2.8)		0		4,262.2		8.2
Redeemable preferred stocks	171.0		1.3		(0.7)		13.0		184.6		0.4
Total fixed maturities	44,556.0		612.6		(138.1)		15.2		45,045.7		86.1
Short-term investments	1,088.7		0		0		0		1,088.7		2.1
Total available-for-sale securities	45,644.7		612.6		(138.1)		15.2		46,134.4		88.2
Equity securities:
Nonredeemable preferred stocks	1,479.9		0		0		92.9		1,572.8		3.0
Common equities	1,238.4		0		0		3,341.8		4,580.2		8.8
Total equity securities	2,718.3		0		0		3,434.7		6,153.0		11.8
Total portfolio1	$	48,363.0	$	612.6	$	(138.1)	$	3,449.9	$	52,287.4	100.0	%

($ in millions)	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Net Holding Period Gains (Losses)		Fair Value		% of Total Fair Value
December 31, 2021
Available-for-sale securities:
Fixed maturities:
U.S. government obligations	$	18,586.1	$	92.9	$	(190.8)	$	0	$	18,488.2	35.9	%
State and local government obligations	2,162.6		36.7		(14.0)		0		2,185.3		4.2
Foreign government obligations	17.9		0		0		0		17.9		0.1
Corporate debt securities	10,526.2		202.6		(33.4)		(3.3)		10,692.1		20.7
Residential mortgage-backed securities	787.7		2.3		(0.6)		0.6		790.0		1.5
Commercial mortgage-backed securities	6,561.0		38.9		(64.3)		0		6,535.6		12.7
Other asset-backed securities	4,981.8		13.3		(12.4)		(0.4)		4,982.3		9.7
Redeemable preferred stocks	170.9		0.7		(0.5)		10.6		181.7		0.4
Total fixed maturities	43,794.2		387.4		(316.0)		7.5		43,873.1		85.2
Short-term investments	942.6		0		0		0		942.6		1.8
Total available-for-sale securities	44,736.8		387.4		(316.0)		7.5		44,815.7		87.0
Equity securities:
Nonredeemable preferred stocks	1,571.8		0		0		68.1		1,639.9		3.2
Common equities	1,264.1		0		0		3,794.4		5,058.5		9.8
Total equity securities	2,835.9		0		0		3,862.5		6,698.4		13.0
Total portfolio1	$	47,572.7	$	387.4	$	(316.0)	$	3,870.0	$	51,514.1	100.0	%

1 Includes $74.7 million, $399.7 million, and $143.4 million of net unsettled security purchase transactions at September 30, 2022 and 2021, and December 31, 2021, respectively, with the offsetting payable included in other liabilities.

The total fair value of the portfolio at September 30, 2022 and 2021, and December 31, 2021, included $4.2 billion, $2.9 billion, and $4.2 billion, respectively, of securities held in a consolidated, non-insurance subsidiary of the holding company, net of unsettled security transactions.

At September 30, 2022, bonds and certificates of deposit in the principal amount of $468.7 million were on deposit to meet state insurance regulatory requirements. We did not hold any securities of any one issuer, excluding U.S. government obligations, with an aggregate cost or fair value exceeding 10% of total shareholders’ equity at September 30, 2022 or 2021, or December 31, 2021. At September 30, 2022, we did not hold any debt securities that were non-income producing during the preceding 12 months.

Short-Term Investments Our short-term investments may include commercial paper and other investments that are expected to mature or are redeemable within one year.

We invested in repurchase and reverse repurchase transactions during 2022 and 2021, but did not have any open positions at September 30, 2022 and 2021, or December 31, 2021. To the extent we enter into repurchase or reverse repurchase transactions, consistent with past practice, we would elect not to offset these transactions and would report them on a gross basis in our consolidated balance sheets, despite the option to elect to offset these transactions as long as they were with the same counterparty and subject to an enforceable master netting arrangement.

Hybrid Securities Certain securities in our fixed-maturity portfolio are accounted for as hybrid securities because they contain embedded derivatives that are not deemed to be clearly and closely related to the host investments. These securities are reported at fair value:

	September 30,
(millions)	2022		2021		December 31, 2021
Fixed Maturities:
Corporate debt securities	$	500.4	$	363.3	$	479.1
Residential mortgage-backed securities	550.8		217.0		536.2
Other asset-backed securities	51.4		104.5		89.2
Redeemable preferred stocks	133.0		133.2		130.8
Total hybrid securities	$	1,235.6	$	818.0	$	1,235.3

Since the embedded derivatives (e.g., change-in-control put option, debt-to-equity conversion, or any other feature unrelated to the credit quality or risk of default of the issuer that could impact the amount or timing of our expected future cash flows) do not have observable intrinsic values, we have elected to record the changes in fair value of these securities through income as a component of net realized gains or losses.

Fixed Maturities The composition of fixed maturities by maturity at September 30, 2022, was:

(millions)	Cost		Fair Value
Less than one year	$	5,461.3	$	5,321.6
One to five years	29,752.3		27,694.2
Five to ten years	12,946.4		11,119.1
Ten years or greater	45.7		38.2
Total	$	48,205.7	$	44,173.1

Asset-backed securities are classified in the maturity distribution table based upon their projected cash flows. All other securities that do not have a single maturity date are reported based upon expected average maturity. Contractual maturities may differ from expected maturities because the issuers of the securities may have the right to call or prepay obligations.

Gross Unrealized Losses The following tables show the composition of gross unrealized losses by major security type and by the length of time that individual securities have been in a continuous unrealized loss position:

	Total No. of Sec.	Total Fair Value		Gross Unrealized Losses		Less than 12 Months					12 Months or Greater
($ in millions)						No. of Sec.	Fair Value		Unrealized Losses		No. of Sec.	Fair  Value		Unrealized Losses
September 30, 2022
U.S. government obligations	157	$	22,385.4	$	(1,855.4)	103	$	16,085.8	$	(1,095.6)	54	$	6,299.6	$	(759.8)
State and local government obligations	353	1,911.0		(215.4)		292	1,363.1		(129.8)		61	547.9		(85.6)
Foreign government obligations	1	15.3		(1.4)		1	15.3		(1.4)		0	0		0
Corporate debt securities	452	8,885.6		(832.5)		391	7,875.5		(699.0)		61	1,010.1		(133.5)
Residential mortgage-backed securities	44	165.1		(16.5)		34	126.0		(11.8)		10	39.1		(4.7)
Commercial mortgage-backed securities	234	5,074.3		(747.4)		182	3,856.0		(425.4)		52	1,218.3		(322.0)
Other asset-backed securities	277	4,544.8		(268.9)		217	3,597.1		(183.4)		60	947.7		(85.5)
Redeemable preferred stocks	4	48.6		(5.6)		3	37.7		(4.0)		1	10.9		(1.6)
Total fixed maturities	1,522	$	43,030.1	$	(3,943.1)	1,223	$	32,956.5	$	(2,550.4)	299	$	10,073.6	$	(1,392.7)

	Total No. of Sec.	Total Fair Value		Gross Unrealized Losses		Less than 12 Months					12 Months or Greater
($ in millions)						No. of Sec.	Fair Value		Unrealized Losses		No. of Sec.	Fair  Value		Unrealized Losses
September 30, 2021
U.S. government obligations	73	$	13,352.8	$	(95.9)	65	$	12,152.6	$	(70.1)	8	$	1,200.2	$	(25.8)
State and local government obligations	96	710.3		(6.7)		81	635.9		(4.9)		15	74.4		(1.8)
Corporate debt securities	227	1,581.3		(10.5)		225	1,551.5		(10.0)		2	29.8		(0.5)
Residential mortgage-backed securities	63	149.3		(0.9)		53	135.1		(0.6)		10	14.2		(0.3)
Commercial mortgage-backed securities	70	1,758.8		(20.6)		65	1,543.6		(19.9)		5	215.2		(0.7)
Other asset-backed securities	114	1,625.9		(2.8)		109	1,614.2		(2.7)		5	11.7		(0.1)
Redeemable preferred stocks	1	11.8		(0.7)		0	0		0		1	11.8		(0.7)
Total fixed maturities	644	$	19,190.2	$	(138.1)	598	$	17,632.9	$	(108.2)	46	$	1,557.3	$	(29.9)

	Total No. of Sec.	Total Fair Value		Gross Unrealized Losses		Less than 12 Months					12 Months or Greater
($ in millions)						No. of Sec.	Fair Value		Unrealized Losses		No. of Sec.	Fair  Value		Unrealized Losses
December 31, 2021
U.S. government obligations	92	$	14,745.8	$	(190.8)	85	$	13,790.8	$	(158.5)	7	$	955.0	$	(32.3)
State and local government obligations	127	954.2		(14.0)		122	927.3		(13.1)		5	26.9		(0.9)
Corporate debt securities	220	3,496.6		(33.4)		219	3,491.7		(33.3)		1	4.9		(0.1)
Residential mortgage-backed securities	20	138.6		(0.6)		14	135.4		(0.5)		6	3.2		(0.1)
Commercial mortgage-backed securities	168	4,315.4		(64.3)		165	4,295.0		(63.9)		3	20.4		(0.4)
Other asset-backed securities	178	3,204.7		(12.4)		176	3,200.6		(12.3)		2	4.1		(0.1)
Redeemable preferred stocks	1	12.0		(0.5)		0	0		0		1	12.0		(0.5)
Total fixed maturities	806	$	26,867.3	$	(316.0)	781	$	25,840.8	$	(281.6)	25	$	1,026.5	$	(34.4)

The increase in the number of securities in an unrealized loss position since both September 30, 2021 and December 31, 2021, was primarily the result of an increase in interest rates. As of September 30, 2022, we had five corporate debt securities that had their credit ratings downgraded during the quarter, with a combined fair value of $99.3 million and an unrealized loss of $23.7 million.

A review of the securities in an unrealized loss position indicated that the issuers were current with respect to their interest obligations and that there was no evidence of deterioration of the current cash flow projections that would indicate we would not receive the remaining principal at maturity.

Allowance For Credit and Uncollectible Losses We are required to measure the amount of potential credit losses for all fixed-maturity securities in an unrealized loss position. We did not record any allowances for credit losses or any write-offs for amounts deemed to be uncollectible during the first nine months of 2022 or 2021, and did not have a material credit loss allowance balance as of September 30, 2022 and 2021, or December 31, 2021. We considered several factors and inputs related to the individual securities as part of our analysis. The methodology and significant inputs used to measure the amount of credit losses in our portfolio included:

•current performance indicators on the business model or underlying assets (e.g., delinquency rates, foreclosure rates, and default rates);

•credit support (via current levels of subordination);

•historical credit ratings; and

•updated cash flow expectations based upon these performance indicators.

In order to determine the amount of credit loss, if any, we initially reviewed securities in a loss position to determine whether it was likely that we would be required, or intended, to sell any of the securities prior to the recovery of their respective cost bases (which could be maturity). If we were likely to, or intended to, sell prior to a potential recovery, we would write off the unrealized loss. For those securities that we determined we were not likely to, or did not intend to, sell prior to a potential recovery, we calculated the net present value (NPV) of the cash flows expected (i.e., expected recovery value) using the current book yield for each security. The NPV was then compared to the security’s current amortized value to determine if a credit loss existed. In the event that the NPV was below the amortized value, and the amount was determined to be material individually, or in aggregate, a credit loss would be deemed to exist, and either an allowance for credit losses would be created, or if an allowance currently existed, either a recovery of the previous allowance, or an incremental loss, would be recorded to net realized gains (losses) on securities.

As of September 30, 2022 and 2021, and December 31, 2021, we believe none of the unrealized losses relate to material credit losses on any specific securities, or in the aggregate. We continue to expect all the securities in our portfolio to pay their principal and interest obligations.

In addition, we reviewed our accrued investment income outstanding on those securities in an unrealized loss position at September 30, 2022 and 2021, and December 31, 2021, to determine if the accrued interest amounts were determined to be uncollectible. Based on our analysis, we believe the issuers have sufficient liquidity and capital reserves to meet their current interest, and future principal, obligations and, therefore, did not write off any accrued income as uncollectible at September 30, 2022 and 2021, or December 31, 2021.

Realized Gains (Losses) The components of net realized gains (losses) for the three and nine months ended September 30, were:

	Three Months				Nine Months
(millions)	2022		2021		2022		2021
Gross realized gains on security sales
Available-for-sale securities:
U.S. government obligations	$	0	$	19.6	$	4.6	$	97.5
State and local government obligations	0		6.0		0		50.3
Corporate and other debt securities	0.3		23.6		6.8		84.4
Residential mortgage-backed securities	0		0		0.7		0.3
Commercial mortgage-backed securities	0		1.4		0		40.7
Other asset-backed securities	0		0.3		0.1		1.0
Redeemable preferred stocks	0		0		0		1.5
Total available-for-sale securities	0.3		50.9		12.2		275.7
Equity securities:
Nonredeemable preferred stocks	0.1		2.3		17.6		26.0
Common equities	1.4		6.2		832.5		352.3
Total equity securities	1.5		8.5		850.1		378.3
Subtotal gross realized gains on security sales	1.8		59.4		862.3		654.0
Gross realized losses on security sales
Available-for-sale securities:
U.S. government obligations	0		(2.0)		(233.5)		(28.5)
State and local government obligations	0		0		(1.0)		(3.0)
Corporate and other debt securities	(14.0)		(0.7)		(51.8)		(6.1)
Residential mortgage-backed securities	0		(0.3)		0		(0.3)
Commercial mortgage-backed securities	(44.8)		(0.5)		(58.6)		(1.6)
Other asset-backed securities	0		0		(2.1)		(0.4)
Short-term investments	0		0		(0.3)		0
Total available-for-sale securities	(58.8)		(3.5)		(347.3)		(39.9)
Equity securities:
Nonredeemable preferred stocks	(5.1)		(0.3)		(7.0)		(0.7)
Common equities	0		(1.7)		(78.0)		(5.6)
Total equity securities	(5.1)		(2.0)		(85.0)		(6.3)
Subtotal gross realized losses on security sales	(63.9)		(5.5)		(432.3)		(46.2)
Net realized gains (losses) on security sales
Available-for-sale securities:
U.S. government obligations	0		17.6		(228.9)		69.0
State and local government obligations	0		6.0		(1.0)		47.3
Corporate and other debt securities	(13.7)		22.9		(45.0)		78.3
Residential mortgage-backed securities	0		(0.3)		0.7		0
Commercial mortgage-backed securities	(44.8)		0.9		(58.6)		39.1
Other asset-backed securities	0		0.3		(2.0)		0.6
Redeemable preferred stocks	0		0		0		1.5
Short-term investments	0		0		(0.3)		0
Total available-for-sale securities	(58.5)		47.4		(335.1)		235.8
Equity securities:
Nonredeemable preferred stocks	(5.0)		2.0		10.6		25.3
Common equities	1.4		4.5		754.5		346.7
Total equity securities	(3.6)		6.5		765.1		372.0
Subtotal net realized gains (losses) on security sales	(62.1)		53.9		430.0		607.8
Net holding period gains (losses)
Hybrid securities	(11.4)		1.0		(98.8)		0
Equity securities	(140.7)		(16.9)		(2,164.1)		479.8
Subtotal net holding period gains (losses)	(152.1)		(15.9)		(2,262.9)		479.8
Other asset impairment	(2.2)		(1.2)		(6.5)		(3.7)
Total net realized gains (losses) on securities	$	(216.4)	$	36.8	$	(1,839.4)	$	1,083.9

Realized gains (losses) on securities sold are computed using the first-in-first-out method. The loss from the fixed-maturity sales reflected the continued rise in interest rates throughout 2022, which resulted in valuation declines for most of our available-for-sale securities. The majority of the sales in the fixed-maturity portfolio during the first nine months of 2022 were from U.S. Treasuries, which were sold to shorten duration. During the third quarter 2022, we selectively sold securities, which were primarily commercial mortgage-backed securities. During the first nine months of 2022, we sold common equity securities, which were in a realized gain position, as part of our plan to incrementally reduce risk in the portfolio in response to the likelihood of a more difficult economic environment over the near term. The other asset impairment loss was recorded as a result of our investment in a federal new markets tax credit fund, which was entered into during the second quarter 2021, and reported in other assets in the consolidated balance sheets.

The following table reflects our holding period realized gains (losses) recognized on equity securities held at the respective quarter ends:

	Three Months				Nine Months
(millions)	2022		2021		2022		2021
Total net gains (losses) recognized during the period on equity securities	$	(144.3)	$	(10.4)	$	(1,399.0)	$	851.8
Less: Net gains (losses) recognized on equity securities sold during the period	(3.6)		6.5		765.1		372.0
Net holding period gains (losses) recognized during the period on equity securities held at period end	$	(140.7)	$	(16.9)	$	(2,164.1)	$	479.8

Net Investment Income The components of net investment income for the three and nine months ended September 30, were: 

	Three Months				Nine Months
(millions)	2022		2021		2022		2021
Available-for-sale securities:
Fixed maturities:
U.S. government obligations	$	86.1	$	39.0	$	205.4	$	106.8
State and local government obligations	9.8		9.7		29.3		34.6
Foreign government obligations	0.1		0		0.2		0
Corporate debt securities	71.8		70.2		215.4		228.6
Residential mortgage-backed securities	8.8		3.2		23.2		9.4
Commercial mortgage-backed securities	48.3		35.0		138.1		105.2
Other asset-backed securities	52.1		16.1		116.5		47.1
Redeemable preferred stocks	3.0		2.3		8.5		7.1
Total fixed maturities	280.0		175.5		736.6		538.8
Short-term investments	24.8		0.4		29.6		2.6
Total available-for-sale securities	304.8		175.9		766.2		541.4
Equity securities:
Nonredeemable preferred stocks	17.3		17.3		53.6		52.5
Common equities	11.5		15.7		48.4		45.9
Total equity securities	28.8		33.0		102.0		98.4
Investment income	333.6		208.9		868.2		639.8
Investment expenses	(5.8)		(6.6)		(17.4)		(18.5)
Net investment income	$	327.8	$	202.3	$	850.8	$	621.3

On a year-over-year basis for the three and nine months ended September 30, 2022, investment income (interest and dividends) increased 60% and 36%, respectively, compared to the same periods last year, primarily due to an increase in interest rates on floating-rate securities in our portfolio and purchases of new investments with higher coupon rates. The recurring investment book yield increased 39% for the third quarter 2022 and 16% for the first nine months of 2022, compared to the same periods in 2021, reflecting investing new cash and cash from maturities in higher interest rate securities given the rising interest rate environment.

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Fair Value

9 Months Ended

Sep. 30, 2022

Fair Value Disclosures [Abstract]

Fair Value

Fair Value — We have categorized our financial instruments, based on the degree of subjectivity inherent in the method by which they are valued, into a fair value hierarchy of three levels, as follows:

•Level 1: Inputs are unadjusted, quoted prices in active markets for identical instruments at the measurement date (e.g., U.S. government obligations, which are continually priced on a daily basis, active exchange-traded equity securities, and certain short-term securities).

•Level 2: Inputs (other than quoted prices included within Level 1) that are observable for the instrument either directly or indirectly (e.g., certain corporate and municipal bonds and certain preferred stocks). This includes: (i) quoted prices for similar instruments in active markets, (ii) quoted prices for identical or similar instruments in markets that are not active, (iii) inputs other than quoted prices that are observable for the instruments, and (iv) inputs that are derived principally from or corroborated by observable market data by correlation or other means.

•Level 3: Inputs that are unobservable. Unobservable inputs reflect our subjective evaluation about the assumptions market participants would use in pricing the financial instrument (e.g., certain structured securities and privately held investments).

Determining the fair value of the investment portfolio is the responsibility of management. As part of the responsibility, we evaluate whether a market is distressed or inactive in determining the fair value for our portfolio. We review certain market level inputs to evaluate whether sufficient activity, volume, and new issuances exist to create an active market. Based on this evaluation, we concluded that there was sufficient activity related to the sectors and securities for which we obtained valuations.

The composition of the investment portfolio by major security type and our outstanding debt was:

	Fair Value
(millions)	Level 1		Level 2		Level 3		Total		Cost
September 30, 2022
Fixed maturities:
U.S. government obligations	$	22,405.5	$	0	$	0	$	22,405.5	$	24,260.9
State and local government obligations	0		1,925.5		0		1,925.5		2,140.9
Foreign government obligations	0		15.3		0		15.3		16.7
Corporate debt securities	0		9,228.4		0		9,228.4		10,119.8
Subtotal	22,405.5		11,169.2		0		33,574.7		36,538.3
Asset-backed securities:
Residential mortgage-backed	0		723.0		0		723.0		754.2
Commercial mortgage-backed	0		5,087.9		0		5,087.9		5,833.9
Other asset-backed	0		4,605.9		0		4,605.9		4,876.7
Subtotal asset-backed securities	0		10,416.8		0		10,416.8		11,464.8
Redeemable preferred stocks:
Financials	0		39.8		0		39.8		43.6
Utilities	0		8.8		0		8.8		10.5
Industrials	8.9		124.1		0		133.0		148.5
Subtotal redeemable preferred stocks	8.9		172.7		0		181.6		202.6
Total fixed maturities	22,414.4		21,758.7		0		44,173.1		48,205.7
Short-term investments	4,219.6		18.0		0		4,237.6		4,237.6
Total available-for-sale securities	26,634.0		21,776.7		0		48,410.7		52,443.3
Equity securities:
Nonredeemable preferred stocks:
Financials	60.9		1,015.6		64.9		1,141.4		1,297.6
Utilities	0		71.3		0		71.3		79.9
Industrials	0		24.7		17.0		41.7		40.1
Subtotal nonredeemable preferred stocks	60.9		1,111.6		81.9		1,254.4		1,417.6
Common equities:
Common stocks	2,597.3		49.3		0		2,646.6		785.0
Other risk investments	0		0		18.7		18.7		18.7
Subtotal common equities	2,597.3		49.3		18.7		2,665.3		803.7
Total equity securities	2,658.2		1,160.9		100.6		3,919.7		2,221.3
Total portfolio	$	29,292.2	$	22,937.6	$	100.6	$	52,330.4	$	54,664.6
Debt	$	0	$	5,634.7	$	0	$	5,634.7	$	6,387.4

	Fair Value
(millions)	Level 1		Level 2		Level 3		Total		Cost
September 30, 2021
Fixed maturities:
U.S. government obligations	$	21,142.1	$	0	$	0	$	21,142.1	$	21,093.1
State and local government obligations	0		2,165.9		0		2,165.9		2,123.8
Foreign government obligations	0		12.3		0		12.3		12.3
Corporate debt securities	0		10,861.7		0		10,861.7		10,556.4
Subtotal	21,142.1		13,039.9		0		34,182.0		33,785.6
Asset-backed securities:
Residential mortgage-backed	0		627.9		0		627.9		624.4
Commercial mortgage-backed	0		5,789.0		0		5,789.0		5,739.4
Other asset-backed	0		4,262.2		0		4,262.2		4,235.6
Subtotal asset-backed securities	0		10,679.1		0		10,679.1		10,599.4
Redeemable preferred stocks:
Financials	0		51.4		0		51.4		50.8
Utilities	0		0		0		0		0
Industrials	10.6		122.6		0		133.2		120.2
Subtotal redeemable preferred stocks	10.6		174.0		0		184.6		171.0
Total fixed maturities	21,152.7		23,893.0		0		45,045.7		44,556.0
Short-term investments	1,078.5		10.2		0		1,088.7		1,088.7
Total available-for-sale securities	22,231.2		23,903.2		0		46,134.4		45,644.7
Equity securities:
Nonredeemable preferred stocks:
Financials	89.8		1,304.6		76.4		1,470.8		1,399.8
Utilities	0		42.1		0		42.1		40.0
Industrials	0		25.5		34.4		59.9		40.1
Subtotal nonredeemable preferred stocks	89.8		1,372.2		110.8		1,572.8		1,479.9
Common equities:
Common stocks	4,513.1		0		54.5		4,567.6		1,225.8
Other risk investments	0		0		12.6		12.6		12.6
Subtotal common equities	4,513.1		0		67.1		4,580.2		1,238.4
Total equity securities	4,602.9		1,372.2		177.9		6,153.0		2,718.3
Total portfolio	$	26,834.1	$	25,275.4	$	177.9	$	52,287.4	$	48,363.0
Debt	$	0	$	5,881.7	$	0	$	5,881.7	$	4,898.2

	Fair Value
(millions)	Level 1		Level 2		Level 3		Total		Cost
December 31, 2021
Fixed maturities:
U.S. government obligations	$	18,488.2	$	0	$	0	$	18,488.2	$	18,586.1
State and local government obligations	0		2,185.3		0		2,185.3		2,162.6
Foreign government obligations	0		17.9		0		17.9		17.9
Corporate debt securities	0		10,692.1		0		10,692.1		10,526.2
Subtotal	18,488.2		12,895.3		0		31,383.5		31,292.8
Asset-backed securities:
Residential mortgage-backed	0		790.0		0		790.0		787.7
Commercial mortgage-backed	0		6,535.6		0		6,535.6		6,561.0
Other asset-backed	0		4,982.3		0		4,982.3		4,981.8
Subtotal asset-backed securities	0		12,307.9		0		12,307.9		12,330.5
Redeemable preferred stocks:
Financials	0		50.9		0		50.9		50.7
Utilities	0		0		0		0		0
Industrials	10.7		120.1		0		130.8		120.2
Subtotal redeemable preferred stocks	10.7		171.0		0		181.7		170.9
Total fixed maturities	18,498.9		25,374.2		0		43,873.1		43,794.2
Short-term investments	942.4		0.2		0		942.6		942.6
Total available-for-sale securities	19,441.3		25,374.4		0		44,815.7		44,736.8
Equity securities:
Nonredeemable preferred stocks:
Financials	115.3		1,305.7		76.4		1,497.4		1,451.7
Utilities	0		82.9		0		82.9		80.0
Industrials	0		25.2		34.4		59.6		40.1
Subtotal nonredeemable preferred stocks	115.3		1,413.8		110.8		1,639.9		1,571.8
Common equities:
Common stocks	4,991.6		50.0		0		5,041.6		1,247.2
Other risk investments	0		0		16.9		16.9		16.9
Subtotal common equities	4,991.6		50.0		16.9		5,058.5		1,264.1
Total equity securities	5,106.9		1,463.8		127.7		6,698.4		2,835.9
Total portfolio	$	24,548.2	$	26,838.2	$	127.7	$	51,514.1	$	47,572.7
Debt	$	0	$	5,857.4	$	0	$	5,857.4	$	4,898.8

Our portfolio valuations, excluding short-term investments, classified as either Level 1 or Level 2 in the above tables are priced exclusively by external sources, including pricing vendors, dealers/market makers, and exchange-quoted prices.

Our short-term investments classified as Level 1 are highly liquid, actively marketed, and have a very short duration, primarily 90 days or less to redemption. These securities are held at their original cost, adjusted for any accretion of discount, since that value very closely approximates what an active market participant would be willing to pay for such securities. The remainder of our short-term investments are classified as Level 2 and are not priced externally since these securities continually trade at par value. These securities are classified as Level 2 since they are primarily longer-dated securities issued by municipalities that contain either liquidity facilities or mandatory put features within one year.

At September 30, 2022, vendor-quoted prices represented 90% of our Level 1 classifications (excluding short-term investments), compared to 82% and 79% at September 30, 2021 and December 31, 2021, respectively. The securities quoted by vendors in Level 1 primarily represent our holdings in U.S. Treasury Notes, which are frequently traded, and the quotes are considered similar to exchange-traded quotes. The balance of our Level 1 pricing comes from quotes obtained directly from trades made on active exchanges.

At both September 30, 2022 and December 31, 2021, vendor-quoted prices comprised 98% of our Level 2 classifications (excluding short-term investments and common stock), while dealer-quoted prices represented the remaining 2%, compared to 97% and 3% at September 30, 2021. In our process for selecting a source (e.g., dealer or pricing service) to provide pricing for securities in our portfolio, we reviewed documentation from the sources that detailed the pricing techniques and methodologies used by these sources and determined if their policies adequately considered market activity, either based on specific transactions for the particular security type or based on modeling of securities with similar credit quality, duration, yield, and structure that were recently transacted. Once a source is chosen, we continue to monitor any changes or modifications to their processes by reviewing their documentation on internal controls for pricing and market reviews. We review quality control measures of our sources as they become available to determine if any significant changes have occurred from period to period that might indicate issues or concerns regarding their evaluation or market coverage.

As part of our pricing procedures, we obtain quotes from more than one source to help us fully evaluate the market price of securities. However, our internal pricing policy is to use a consistent source for individual securities in order to maintain the integrity of our valuation process. Quotes obtained from the sources are not considered binding offers to transact. Under our policy, when a review of the valuation received from our selected source appears to be outside of what is considered market level activity (which is defined as trading at spreads or yields significantly different than those of comparable securities or outside the general sector level movement without a reasonable explanation), we may use an alternate source’s price. To the extent we determine that it may be prudent to substitute one source’s price for another, we will contact the initial source to obtain an understanding of the factors that may be contributing to the significant price variance.

To allow us to determine if our initial source is providing a price that is outside of a reasonable range, we review our portfolio pricing on a weekly basis. When necessary, we challenge prices from our sources when a price provided does not match our expectations based on our evaluation of market trends and activity. Initially, we perform a review of our portfolio by sector to identify securities whose prices appear outside of a reasonable range. We then perform a more detailed review of fair values for securities disclosed as Level 2. We review dealer bids and quotes for these and/or similar securities to determine the market level context for our valuations. We then evaluate inputs relevant for each class of securities disclosed in the preceding hierarchy tables.

For structured debt securities, including commercial, residential, and other asset-backed securities, we evaluate available market-related data for these and similar securities related to collateral, delinquencies, and defaults for historical trends and reasonably estimable projections, as well as historical prepayment rates and current prepayment assumptions and cash flow estimates. We further stratify each class of our structured debt securities into more finite sectors (e.g., planned amortization class, first pay, second pay, senior, subordinated, etc.) and use duration, credit quality, and coupon to determine if the fair value is appropriate.

For corporate debt and preferred stock (redeemable and nonredeemable) portfolios, as well as the notes issued by The Progressive Corporation (see Note 4 – Debt), we review securities by duration, coupon, and credit quality, as well as changes in interest rate and credit spread movements within that stratification. The review also includes recent trades, including: volume traded at various levels that establish a market; issuer specific fundamentals; and industry specific economic news as it comes to light.

For municipal securities (e.g., general obligations, revenue, and housing), we stratify the portfolio to evaluate securities by type, coupon, credit quality, and duration to review price changes relative to credit spread and interest rate changes. Additionally, we look to economic data as it relates to geographic location as an indication of price-to-call or maturity predictors. For municipal housing securities, we look to changes in cash flow projections, both historical and reasonably estimable projections, to understand yield changes and their effect on valuation.

For short-term securities, we look at acquisition price relative to the coupon or yield. Since our short-term securities are typically 90 days or less to maturity, with the majority listed in Level 2 being 30 days or less to redemption, we believe that acquisition price is the best estimate of fair value.

We also review data assumptions as supplied by our sources to determine if that data is relevant to current market conditions. In addition, we independently review each sector for transaction volumes, new issuances, and changes in spreads, as well as the overall movement of interest rates along the yield curve to determine if sufficient activity and liquidity exists to provide a credible source for our market valuations.

During each valuation period, we create internal estimations of portfolio valuation (performance returns), based on current market-related activity (i.e., interest rate and credit spread movements and other credit-related factors) within each major sector of our portfolio. We compare our internally generated portfolio results with those generated based on quotes we receive externally and research material valuation differences. We compare our results to index returns for each major sector adjusting for duration and credit quality differences to better understand our portfolio’s results. Additionally, we review on a monthly basis our external sales transactions and compare the actual final market sales prices to previous market valuation prices. This review provides us further validation that our pricing sources are providing market level prices, since we are able to explain significant price changes (i.e., greater than 2%) as known events occur in the marketplace and affect a particular security’s price at sale.

This analysis provides us with additional comfort regarding the source’s process, the quality of its review, and its willingness to improve its analysis based on feedback from clients. We believe this effort helps ensure that we are reporting the most representative fair values for our securities.

After all the valuations are received and our review of Level 2 securities is complete, if the inputs used by vendors are determined to not contain sufficient observable market information, we will reclassify the affected securities to Level 3.

Except as described below, our Level 3 securities are priced externally; however, due to several factors (e.g., nature of the securities, level of activity, and lack of similar securities trading to obtain observable market level inputs), these valuations are more subjective in nature.

To the extent we receive prices from external sources (e.g., broker, valuation firm) for the Level 3 securities, we review those prices for reasonableness using internally developed assumptions and then compare our derived prices to the prices received from the external sources. Based on our review, all prices received from external sources remained unadjusted.

If we do not receive prices from an external source, we perform an internal fair value comparison, which includes a review and analysis of market-comparable securities, to determine if fair value changes are needed. Based on this analysis, certain private equity investments included in the Level 3 category remain valued at cost or were priced using a recent transaction as the basis for fair value. At least annually, these private equity investments are priced by an external source.

Our Level 3 other risk investments include securities accounted for under the equity method of accounting and, therefore, are not subject to fair value reporting. Since these securities represent less than 0.1% of our total portfolio, we will continue to include them in our Level 3 disclosures and report the activity from these investments as “other” changes in the summary of changes in fair value table and categorize these securities as “pricing exemption securities” in the quantitative information table.

The Level 3 common stock held at September 30, 2021 was transferred to Level 2 at December 31, 2021. At September 30, 2022 and 2021, and December 31, 2021, we did not have any securities in our fixed-maturity portfolio listed as Level 3.

Other than goodwill, during the third quarter and first nine months of 2022 and 2021, there were no material assets or liabilities measured at fair value on a nonrecurring basis. During the second quarter 2022, we determined that the fair value of the goodwill related to our ARX Holding Corp. (ARX) reporting unit was less than the carrying value and we wrote down $224.8 million of our total goodwill asset. See Note 12 – Goodwill and Intangible Assets for further discussion. Due to the relative size of the Level 3 securities’ fair values compared to the total portfolio’s fair value, any changes in pricing methodology would not have a significant change in valuation that would materially impact net or comprehensive income.

The following tables provide a summary of changes in fair value associated with Level 3 assets for the three and nine months ended September 30, 2022 and 2021:

	Level 3 Fair Value
(millions)	Fair Value at June 30, 2022		Calls/ Maturities/ Paydowns/Other		Purchases		Sales		Net Realized (Gain)/Loss on Sales		Change in Valuation		Net Transfers In (Out)		Fair Value at September 30, 2022
Equity securities:
Nonredeemable preferred stocks:
Financials	$	64.9	$	0	$	0	$	0	$	0	$	0	$	0	$	64.9
Industrials	17.0		0		0		0		0		0		0		17.0
Common equities:
Other risk investments	18.5		0.2		0		0		0		0		0		18.7
Total Level 3 securities	$	100.4	$	0.2	$	0	$	0	$	0	$	0	$	0	$	100.6
	Level 3 Fair Value
(millions)	Fair Value at June 30, 2021		Calls/ Maturities/ Paydowns/Other		Purchases		Sales		Net Realized (Gain)/Loss on Sales		Change in Valuation		Net Transfers In (Out)		Fair Value at September 30, 2021
Equity securities:
Nonredeemable preferred stocks:
Financials	$	76.4	$	0	$	0	$	0	$	0	$	0	$	0	$	76.4
Industrials	34.4		0		0		0		0		0		0		34.4
Common equities:
Common stocks	52.5		0		2.0		0		0		0		0		54.5
Other risk investments	11.6		1.0		0		0		0		0		0		12.6
Total Level 3 securities	$	174.9	$	1.0	$	2.0	$	0	$	0	$	0	$	0	$	177.9
	Level 3 Fair Value
(millions)	Fair Value at Dec. 31, 2021		Calls/ Maturities/ Paydowns/Other		Purchases		Sales		Net Realized (Gain)/Loss on Sales		Change in Valuation		Net Transfers In (Out)		Fair Value at September 30, 2022
Equity securities:
Nonredeemable preferred stocks:
Financials	$	76.4	$	0	$	0	$	(15.0)	$	(17.2)	$	20.7	$	0	$	64.9
Industrials	34.4		(0.5)		0		0		0		(16.9)		0		17.0
Common equities:
Other risk investments	16.9		1.8		0		0		0		0		0		18.7
Total Level 3 securities	$	127.7	$	1.3	$	0	$	(15.0)	$	(17.2)	$	3.8	$	0	$	100.6

	Level 3 Fair Value
(millions)	Fair Value at Dec. 31, 2020		Calls/ Maturities/ Paydowns/Other		Purchases		Sales		Net Realized (Gain)/Loss on Sales		Change in Valuation		Net Transfers In (Out)		Fair Value at September 30, 2021
Equity securities:
Nonredeemable preferred stocks:
Financials	$	10.0	$	0	$	60.2	$	0	$	0	$	6.2	$	0	$	76.4
Industrials	16.7		0		5.0		(5.0)		(4.5)		22.2		0		34.4
Common equities:
Common stocks	25.0		0		2.0		0		0		27.5		0		54.5
Other risk investments	3.1		9.5		0		0		0		0		0		12.6
Total Level 3 securities	$	54.8	$	9.5	$	67.2	$	(5.0)	$	(4.5)	$	55.9	$	0	$	177.9

The following tables provide a summary of the quantitative information about Level 3 fair value measurements for our applicable securities at September 30, 2022 and 2021, and December 31, 2021:

	Quantitative Information about Level 3 Fair Value Measurements
($ in millions)	Fair Value at September 30, 2022		Valuation Technique	Unobservable Input	Range of Input Values Increase (Decrease)	Weighted Average Increase (Decrease)
Equity securities:
Nonredeemable preferred stocks	$	81.9	Market comparables	Weighted average market capitalization price change %	(20.7)% to (1.1)%	(6.6)	%
Subtotal Level 3 securities	81.9
Pricing exemption securities	18.7
Total Level 3 securities	$	100.6

	Quantitative Information about Level 3 Fair Value Measurements
($ in millions)	Fair Value at September 30, 2021		Valuation Technique	Unobservable Input	Range of Input Values Increase (Decrease)	Weighted Average Increase (Decrease)
Equity securities:
Nonredeemable preferred stocks	$	110.8	Market comparables	Weighted average market capitalization price change %	(8.5)% to 19.8%	6.5	%
Common stocks	54.5		Market comparables	Weighted average market capitalization price change %	(1.6)% to 55.8%	0.9	%
Subtotal Level 3 securities	165.3
Pricing exemption securities	12.6
Total Level 3 securities	$	177.9

	Quantitative Information about Level 3 Fair Value Measurements
($ in millions)	Fair Value at Dec. 31, 2021		Valuation Technique	Unobservable Input	Range of Input Values Increase (Decrease)	Weighted Average Increase (Decrease)
Equity securities:
Nonredeemable preferred stocks	$	110.8	Market comparables	Weighted average market capitalization price change %	(20.2)% to (2.3)%	(7.7)%
Subtotal Level 3 securities	110.8
Pricing exemption securities	16.9
Total Level 3 securities	$	127.7

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Debt

9 Months Ended

Sep. 30, 2022

Debt Disclosure [Abstract]

Debt

Debt — Debt at each of the balance sheet periods consisted of:

	September 30, 2022				September 30, 2021				December 31, 2021
(millions)	Carrying Value		Fair Value		Carrying Value		Fair Value		Carrying Value		Fair Value
2.45% Senior Notes due 2027 (issued: $500.0, August 2016)	$	498.1	$	459.7	$	497.6	$	530.6	$	497.7	$	517.9
2.50% Senior Notes due 2027 (issued: $500.0, March 2022)	497.4		451.6		0		0		0		0
6 5/8% Senior Notes due 2029 (issued: $300.0, March 1999)	297.4		322.1		297.1		390.9		297.2		388.2
4.00% Senior Notes due 2029 (issued: $550.0, October 2018)	546.3		519.5		545.8		627.9		545.9		621.0
3.20% Senior Notes due 2030 (issued: $500.0, March 2020)	496.8		439.3		496.4		543.2		496.5		536.3
3.00% Senior Notes due 2032 (issued: $500.0, March 2022)	495.8		418.8		0		0		0		0
6.25% Senior Notes due 2032 (issued: $400.0, November 2002)	396.4		426.0		396.1		545.5		396.2		547.9
4.35% Senior Notes due 2044 (issued: $350.0, April 2014)	346.9		298.5		346.8		433.6		346.8		428.4
3.70% Senior Notes due 2045 (issued: $400.0, January 2015)	395.7		305.7		395.6		456.2		395.6		447.1
4.125% Senior Notes due 2047 (issued: $850.0, April 2017)	842.0		710.3		841.9		1,018.5		841.9		1,029.3
4.20% Senior Notes due 2048 (issued: $600.0, March 2018)	590.3		505.9		590.2		736.3		590.2		741.3
3.95% Senior Notes due 2050 (issued: $500.0, March 2020)	490.9		396.6		490.7		599.0		490.8		600.0
3.70% Senior Notes due 2052 (issued: $500.0, March 2022)	493.4		380.7		0		0		0		0
Total	$	6,387.4	$	5,634.7	$	4,898.2	$	5,881.7	$	4,898.8	$	5,857.4

The Progressive Corporation issued $500 million of 2.50% Senior Notes due 2027, $500 million of 3.00% Senior Notes due 2032, and $500 million of 3.70% Senior Notes due 2052 in March 2022, in an underwritten public offering. The net proceeds from the issuances, after deducting underwriters’ discounts, commissions, and other issuance costs, were approximately $1,486.0 million in aggregate. Consistent with the other senior notes issued by Progressive, interest on these notes is payable semiannually, principal is due at maturity, and the notes are redeemable, in whole or in part, at any time, subject to a treasury “make whole” provision.

There was no short-term debt outstanding at September 30, 2022 and 2021, and December 31, 2021.

The Progressive Corporation has a line of credit with PNC Bank, National Association (PNC), in the maximum principal amount of $250 million, which has the same terms as the line of credit with PNC that expired in April 2022. See the 2021 Annual Report to Shareholders for a discussion of the terms of this line of credit. We had no borrowings under the line of credit during the periods presented.

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Income Taxes

9 Months Ended

Sep. 30, 2022

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes — Deferred tax assets and liabilities are recorded based on the difference between the financial statement and tax bases of assets and liabilities at the enacted tax rates. We review our deferred tax assets regularly for recoverability. At September 30, 2022 and 2021, and December 31, 2021, we determined that we did not need a valuation allowance on our gross deferred tax assets. Although realization of the deferred tax assets is not assured, management believes that it is more likely than not the deferred tax assets will be realized based on our expectation that we will be able to fully utilize the deductions that are ultimately recognized for tax purposes.

For the nine months ended September 30, 2022, there have been no material changes in our reserve for uncertain tax positions.

The effective tax rate for the three and nine months ended September 30, 2022, was 12.9% and (1.6)%, respectively, compared to 14.7% and 20.5% for the same periods last year. The difference between our effective tax rate and the statutory rate, for the three months ended September 30, 2022 and 2021, and the nine months ended September 30, 2022, is primarily driven by the low amount of income (loss) before taxes during those periods. The provision for income taxes differed from the statutory rate as follows:

	Three Months Ended September 30,								Nine Months Ended September 30,
($ in millions)	2022				2021				2022				2021
Income (loss) before income taxes	$	142.5			$	139.0			$	(103.2)			$	3,006.1
Tax at statutory federal rate	$	29.9	21.0	%	$	29.2	21.0	%	$	(21.7)	21.0	%	$	631.3	21.0	%
Tax effect of:
Goodwill impairment	0		0		0		0		47.2		(45.7)		0		0
Stock-based compensation	(9.6)		(6.7)		(7.9)		(5.7)		(17.7)		17.2		(19.2)		(0.6)
State income taxes, net of federal taxes	4.5		3.2		5.5		4.0		9.7		(9.4)		17.7		0.6
Tax-preferenced investment income	(2.8)		(2.0)		(3.3)		(2.4)		(9.5)		9.2		(10.0)		(0.3)
Tax credits	(5.2)		(3.6)		(3.7)		(2.7)		(9.4)		9.1		(6.1)		(0.2)
Nondeductible compensation expense	1.8		1.3		1.9		1.4		5.4		(5.2)		5.6		0.2
Tax deductible dividends	(0.4)		(0.3)		(0.5)		(0.4)		(1.4)		1.4		(1.6)		(0.1)
Other items, net	0.2		0		(0.7)		(0.5)		(0.9)		0.8		(0.2)		(0.1)
Total income tax provision	$	18.4	12.9	%	$	20.5	14.7	%	$	1.7	(1.6)	%	$	617.5	20.5	%

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Loss and Loss Adjustment Expense Reserves

9 Months Ended

Sep. 30, 2022

Loss and Loss Adjustment Expenses Reserves [Abstract]

Loss and Loss Adjustment Expenses Reserves

Loss and Loss Adjustment Expense Reserves — Activity in the loss and loss adjustment expense reserves is summarized as follows:

	September 30,
(millions)	2022		2021
Balance at January 1	$	26,164.1	$	20,265.8
Less reinsurance recoverables on unpaid losses	4,733.6		3,798.2
Net balance at January 1	21,430.5		16,467.6
Net loss and loss adjustment expense reserves acquired1	0		732.5
Total beginning reserves	21,430.5		17,200.1
Incurred related to:
Current year	28,245.4		24,610.8
Prior years	52.8		156.8
Total incurred	28,298.2		24,767.6
Paid related to:
Current year	15,712.4		13,650.6
Prior years	9,418.5		7,213.3
Total paid	25,130.9		20,863.9
Net balance at September 30	24,597.8		21,103.8
Plus reinsurance recoverables on unpaid losses	6,034.0		4,822.5
Balance at September 30	$	30,631.8	$	25,926.3

1 Net reserves acquired in the Protective Insurance acquisition.

We experienced unfavorable reserve development of $52.8 million and $156.8 million during the first nine months of 2022 and 2021, respectively, which is reflected as “incurred related to prior years” in the table above.

Year-to-date September 30, 2022

•The unfavorable prior year reserve development included approximately $45 million attributable to accident year 2021 and $29 million to 2019 and prior accident years, partially offset by $21 million favorable development attributable to accident year 2020.

•Our personal auto products incurred about $28 million of favorable loss and loss adjustment expense (LAE) reserve development, with about $25 million attributable to the Direct business. The favorable development was primarily attributable to more subrogation and salvage recoveries and lower loss adjustment expenses than originally anticipated, partially offset by higher than anticipated severity and frequency of auto property damage payments on previously closed claims and late reported injury claims.

•Our Commercial Lines business experienced about $77 million of unfavorable development, primarily due to higher than anticipated severity of injury case reserves and higher than anticipated severity and frequency of late reported claims in our transportation network company business.

•Our Property business experienced minimal unfavorable prior accident year development, which was almost completely offset by minimal favorable development in our special lines products.

Year-to-date September 30, 2021

•The unfavorable prior year reserve development included $109 million attributable to accident year 2019 and $113 million to 2018 and prior accident years, partially offset by favorable development attributable to accident year 2020.

•Our personal auto products incurred $48 million of unfavorable loss and LAE reserve development, with about $44 million attributable to the Agency business. The unfavorable development was primarily attributable to a higher than anticipated frequency of reopened personal injury protection claims, primarily in Florida, and higher than anticipated bodily injury severity, partially offset by less late reported claims than anticipated for accident year 2020 and lower adjusting expenses than anticipated.

•Our Commercial Lines business experienced $91 million of unfavorable development, primarily due to increased injury severity and the emergence of large injury claims, at rates higher than originally anticipated, primarily in Texas and Florida.

•Our Property business experienced $31 million of unfavorable development, primarily due to higher than anticipated severity and reopened claims activity in Florida.

•Our special lines products experienced about $12 million of favorable development.

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Supplemental Cash Flow Information

9 Months Ended

Sep. 30, 2022

Supplemental Cash Flow Elements [Abstract]

Supplemental Cash Flow Information

Supplemental Cash Flow Information — Cash and cash equivalents include bank demand deposits and daily overnight reverse repurchase commitments of funds held in bank demand deposit accounts by certain subsidiaries. The amount of reverse repurchase commitments, which are not considered part of the investment portfolio, held by these subsidiaries at September 30, 2022 and 2021, and December 31, 2021, were $123.0 million, $134.6 million, and $137.1 million, respectively.

Restricted cash and cash equivalents include collateral held against unpaid deductibles and cash that is restricted to pay flood claims under the National Flood Insurance Program’s “Write Your Own” program, for which certain subsidiaries are administrators.

Non-cash activity included the following in the respective periods:

	Nine Months Ended September 30,
(millions)	2022		2021
Common share dividends1	$	58.5	$	58.5
Operating lease liabilities2	29.7		79.5

1 Declared but unpaid. See Note 9 – Dividends for further discussion.

2 From obtaining right-of-use assets.

We paid the following in the respective periods: 

	Nine Months Ended September 30,
(millions)	2022		2021
Income taxes	$	595.9	$	669.5
Interest	191.3		186.3
Operating lease liabilities	62.5		67.8

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Segment Information

9 Months Ended

Sep. 30, 2022

Segment Reporting [Abstract]

Segment Information

Segment Information — Our Personal Lines segment writes insurance for personal autos and recreational vehicles (our special lines products). Our Commercial Lines segment writes auto-related liability and physical damage insurance, workers’ compensation insurance primarily for the transportation industry, and business-related general liability and property insurance, predominately for small businesses. Our Property segment writes residential property insurance for homeowners, other property owners, and renters. Our service businesses provide insurance-related services, including processing Commercial Automobile Insurance Procedures/Plans (CAIP) business and serving as an agent for homeowners, general liability, and workers’ compensation insurance, among other products, through programs in our direct Personal Lines and Commercial Lines businesses. As previously discussed in our Annual Report on Form 10-K for the year ended December 31, 2021, during the third quarter 2022, our CAIP service contract expired and we did not renew the contract. This non-renewal will not materially affect our financial condition, results of operations, or cash flows. All segment revenues are generated from external customers; all intercompany transactions are eliminated in consolidation.

Following are the operating results for the respective periods:

	Three Months Ended September 30,								Nine Months Ended September 30,
	2022				2021				2022				2021
(millions)	Revenues		Pretax Profit (Loss)		Revenues		Pretax Profit (Loss)		Revenues		Pretax Profit (Loss)		Revenues		Pretax Profit (Loss)
Personal Lines
Agency	$	4,441.9	$	(41.3)	$	4,267.9	$	41.0	$	13,131.7	$	507.6	$	12,586.4	$	796.0
Direct	5,077.4		40.6		4,690.2		(62.4)		14,776.9		389.4		13,755.8		480.6
Total Personal Lines1	9,519.3		(0.7)		8,958.1		(21.4)		27,908.6		897.0		26,342.2		1,276.6
Commercial Lines	2,317.9		238.1		1,877.4		197.5		6,749.5		683.5		4,917.0		556.1
Property2	561.0		(141.0)		526.5		(222.7)		1,689.6		(289.6)		1,501.3		(376.7)
Other indemnity3	0.7		(2.1)		2.8		(0.3)		2.0		(9.3)		6.8		(0.2)
Total underwriting operations	12,398.9		94.3		11,364.8		(46.9)		36,349.7		1,281.6		32,767.3		1,455.8
Fees and other revenues4	181.4		NA		174.9		NA		531.9		NA		516.8		NA
Service businesses	82.7		(0.1)		73.8		1.0		230.5		9.0		202.1		12.1
Investments5	117.2		111.4		245.7		239.1		(971.2)		(988.6)		1,723.7		1,705.2
Interest expense	NA		(63.1)		NA		(54.2)		NA		(180.4)		NA		(167.0)
Property - Goodwill impairment2	NA		0		NA		0		NA		(224.8)		NA		0
Consolidated total	$	12,780.2	$	142.5	$	11,859.2	$	139.0	$	36,140.9	$	(103.2)	$	35,209.9	$	3,006.1

NA = Not applicable

1 Personal auto products accounted for 94% of the total Personal Lines segment net premiums earned during the three and nine months ended September 30, 2022 and 2021; our special lines products (e.g., motorcycles, ATVs, RVs, watercraft, and snowmobiles) accounted for the balance of the Personal Lines net premiums earned.

2 The total pretax loss, including goodwill impairment, for the Property segment was $514.4 million for the nine months ended September 30, 2022. For the three and nine months ended September 30, 2022, pretax profit (loss) also included $5.0 million and $24.1 million, respectively, of amortization expense associated with acquisition-related intangible assets attributable to our Property segment, and $14.2 million and $42.5 million for the same periods in 2021.

See Note 12 – Goodwill and Intangible Assets for further discussion.

3 Primarily includes run-off business operations.

4 Pretax profit (loss) for fees and other revenues is allocated to operating segments.

5 Revenues represent recurring investment income and total net realized gains (losses) on securities; pretax profit (loss) is net of investment expense.

Our management uses underwriting margin and combined ratio as primary measures of underwriting profitability. The underwriting margin is the pretax underwriting profit (loss) expressed as a percentage of net premiums earned (i.e., revenues from underwriting operations). Pretax underwriting profit (loss) is calculated as net premiums earned plus fees and other revenues, less: (i) losses and loss adjustment expenses; (ii) policy acquisition costs; and (iii) other underwriting expenses. Combined ratio is the complement of the underwriting margin. Following are the underwriting margins and combined ratios for our underwriting operations for the respective periods:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2022			2021			2022			2021
	Under-writing Margin		Combined Ratio	Under-writing Margin		Combined Ratio	Under-writing Margin		Combined Ratio	Under-writing Margin		Combined Ratio
Personal Lines
Agency	(0.9)	%	100.9	1.0	%	99.0	3.9	%	96.1	6.3	%	93.7
Direct	0.8		99.2	(1.3)		101.3	2.6		97.4	3.5		96.5
Total Personal Lines	0		100.0	(0.2)		100.2	3.2		96.8	4.9		95.1
Commercial Lines	10.3		89.7	10.5		89.5	10.1		89.9	11.3		88.7
Property1	(25.1)		125.1	(42.3)		142.3	(17.1)		117.1	(25.1)		125.1
Total underwriting operations	0.8		99.2	(0.4)		100.4	3.5		96.5	4.4		95.6

1 Included in the three and nine months ended September 30, 2022, is 0.9 points and 1.4 points, respectively, of amortization expense associated with intangible assets and 2.7 points and 2.8 points, respectively, for the same periods in 2021.

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Dividends

9 Months Ended

Sep. 30, 2022

Dividends [Abstract]

Dividends

Dividends — Following is a summary of our common and preferred share dividends that were declared and/or paid during the nine months ended September 30, 2022 and 2021:

(millions, except per share amounts)		Amount
Declared	Payable	Per Share		Accrued/Paid1
Common - Quarterly Dividends:
August 2022	October 2022	$	0.10	$	58.5
May 2022	July 2022	0.10		58.5
March 2022	April 2022	0.10		58.5
December 2021	January 2022	0.10		58.5
August 2021	October 2021	0.10		58.5
May 2021	July 2021	0.10		58.5
March 2021	April 2021	0.10		58.5
December 2020	January 2021	0.10		58.6
Common - Annual Variable Dividends:
December 2020	January 2021	4.50		2,635.9
Preferred Dividends:
August 2022	September 2022	26.875		13.4
December 2021	March 2022	26.875		13.4
August 2021	September 2021	26.875		13.4
December 2020	March 2021	26.875		13.4

1 The common share dividend accrual is based on an estimate of common shares outstanding as of the record date and all accruals are recorded as a part of accounts payable, accrued expenses, and other liabilities on the consolidated balance sheets until paid.

See Note 14 – Dividends in our 2021 Annual Report to Shareholders for a discussion of our quarterly and annual common share dividends and our preferred share dividend policies, including a discussion of the $1.50 per common share, or $876.5 million in the aggregate, 2021 annual variable common share dividend that was declared and paid in the fourth quarter 2021.

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Other Comprehensive Income (Loss)

9 Months Ended

Sep. 30, 2022

Equity [Abstract]

Other Comprehensive Income (Loss)

Other Comprehensive Income (Loss) — The components of other comprehensive income (loss), including reclassification adjustments by income statement line item, were as follows: 

							Components of Changes in Accumulated Other Comprehensive Income (after tax)
(millions)	Pretax total accumulated other comprehensive income (loss)		Total tax (provision) benefit		After tax total accumulated other comprehensive income (loss)		Total net unrealized gains  (losses) on securities		Net unrealized losses on forecasted transactions		Foreign currency translation adjustment
Balance at June 30, 2022	$	(2,795.5)	$	586.5	$	(2,209.0)	$	(2,193.5)	$	(14.7)	$	(0.8)
Other comprehensive income (loss) before reclassifications:
Investment securities	(1,223.3)		256.9		(966.4)		(966.4)		0		0
Foreign currency translation adjustment	(0.9)		0.2		(0.7)		0		0		(0.7)
Total other comprehensive income (loss) before reclassifications	(1,224.2)		257.1		(967.1)		(966.4)		0		(0.7)
Less: Reclassification adjustment for amounts realized in net income by income statement line item:
Net realized gains (losses) on securities	(58.4)		12.3		(46.1)		(46.1)		0		0
Interest expense	(0.2)		0.1		(0.1)		0		(0.1)		0
Total reclassification adjustment for amounts realized in net income	(58.6)		12.4		(46.2)		(46.1)		(0.1)		0
Total other comprehensive income (loss)	(1,165.6)		244.7		(920.9)		(920.3)		0.1		(0.7)
Balance at September 30, 2022	$	(3,961.1)	$	831.2	$	(3,129.9)	$	(3,113.8)	$	(14.6)	$	(1.5)

							Components of Changes in Accumulated Other Comprehensive Income (after tax)
(millions)	Pretax total accumulated other comprehensive income (loss)		Total tax (provision) benefit		After tax total accumulated other comprehensive income (loss)		Total net unrealized gains  (losses) on securities		Net unrealized losses on forecasted transactions		Foreign currency translation adjustment
Balance at June 30, 2021	$	619.6	$	(136.4)	$	483.2	$	498.8	$	(15.1)	$	(0.5)
Other comprehensive income (loss) before reclassifications:
Investment securities	(117.9)		24.8		(93.1)		(93.1)		0		0
Foreign currency translation adjustment	(0.3)		0.1		(0.2)		0		0		(0.2)
Total other comprehensive income (loss) before reclassifications	(118.2)		24.9		(93.3)		(93.1)		0		(0.2)
Less: Reclassification adjustment for amounts realized in net income by income statement line item:
Net realized gains (losses) on securities	46.4		(9.7)		36.7		36.7		0		0
Interest expense	(0.2)		0.1		(0.1)		0		(0.1)		0
Total reclassification adjustment for amounts realized in net income	46.2		(9.6)		36.6		36.7		(0.1)		0
Total other comprehensive income (loss)	(164.4)		34.5		(129.9)		(129.8)		0.1		(0.2)
Balance at September 30, 2021	$	455.2	$	(101.9)	$	353.3	$	369.0	$	(15.0)	$	(0.7)
							Components of Changes in Accumulated Other Comprehensive Income (after tax)
(millions)	Pretax total accumulated other comprehensive income (loss)		Total tax (provision) benefit		After tax total accumulated other comprehensive income (loss)		Total net unrealized gains  (losses) on securities		Net unrealized losses on forecasted transactions		Foreign currency translation adjustment
Balance at December 31, 2021	$	52.3	$	(11.6)	$	40.7	$	56.2	$	(14.9)	$	(0.6)
Other comprehensive income (loss) before reclassifications:
Investment securities	(4,321.7)		907.6		(3,414.1)		(3,414.1)		0		0
Foreign currency translation adjustment	(1.1)		0.2		(0.9)		0		0		(0.9)
Total other comprehensive income (loss) before reclassifications	(4,322.8)		907.8		(3,415.0)		(3,414.1)		0		(0.9)
Less: Reclassification adjustment for amounts realized in net income by income statement line item:
Net realized gains (losses) on securities	(309.0)		64.9		(244.1)		(244.1)		0		0
Interest expense	(0.4)		0.1		(0.3)		0		(0.3)		0
Total reclassification adjustment for amounts realized in net income	(309.4)		65.0		(244.4)		(244.1)		(0.3)		0
Total other comprehensive income (loss)	(4,013.4)		842.8		(3,170.6)		(3,170.0)		0.3		(0.9)
Balance at September 30, 2022	$	(3,961.1)	$	831.2	$	(3,129.9)	$	(3,113.8)	$	(14.6)	$	(1.5)

							Components of Changes in Accumulated Other Comprehensive Income (after tax)
(millions)	Pretax total accumulated other comprehensive income (loss)		Total tax (provision) benefit		After tax total accumulated other comprehensive income (loss)		Total net unrealized gains  (losses) on securities		Net unrealized losses on forecasted transactions		Foreign currency translation adjustment
Balance at December 31, 2020	$	1,187.4	$	(255.7)	$	931.7	$	947.3	$	(15.6)	$	0
Other comprehensive income (loss) before reclassifications:
Investment securities	(494.6)		103.9		(390.7)		(390.7)		0		0
Foreign currency translation adjustment	(0.9)		0.2		(0.7)		0		0		(0.7)
Total other comprehensive income (loss) before reclassifications	(495.5)		104.1		(391.4)		(390.7)		0		(0.7)
Less: Reclassification adjustment for amounts realized in net income by income statement line item:
Net realized gains (losses) on securities	237.5		(49.9)		187.6		187.6		0		0
Interest expense	(0.8)		0.2		(0.6)		0		(0.6)		0
Total reclassification adjustment for amounts realized in net income	236.7		(49.7)		187.0		187.6		(0.6)		0
Total other comprehensive income (loss)	(732.2)		153.8		(578.4)		(578.3)		0.6		(0.7)
Balance at September 30, 2021	$	455.2	$	(101.9)	$	353.3	$	369.0	$	(15.0)	$	(0.7)

In an effort to manage interest rate risk, we entered into forecasted transactions on certain of Progressive’s debt issuances. We expect to reclassify $0.5 million (pretax) into interest expense during the next 12 months, related to net unrealized losses on these forecasted transactions (see Note 4 – Debt in our 2021 Annual Report to Shareholders for further discussion).

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Litigation

9 Months Ended

Sep. 30, 2022

Commitments and Contingencies Disclosure [Abstract]

Litigation

Litigation — The Progressive Corporation and/or its insurance subsidiaries are named as defendants in various lawsuits arising out of claims made under insurance policies written by our insurance subsidiaries in the ordinary course of business. We consider all legal actions relating to such claims in establishing our loss and loss adjustment expense reserves.

In addition, The Progressive Corporation and/or its subsidiaries are named as defendants in a number of class action or individual lawsuits that challenge certain of the operations of the subsidiaries. These cases include and/or typically have included those alleging damages as a result of, among other things: our subsidiaries’ methods used for evaluating and paying medical or injury claims or benefits, including, but not limited to, certain bodily injury, personal injury protection, uninsured motorist/underinsured motorist (UM/UIM), and medical payment claims and for reimbursing medical costs incurred by Medicare/Medicaid beneficiaries; other claims handling procedures, including, but not limited to, challenges relating to our network of repair facilities, our methods used for estimating physical damage to vehicles for repair purposes and for evaluating the actual cash value of total loss vehicles, our payment of fees and taxes, our subrogation practices, our salvage practices, and our handling of diminution of value claims; homeowner claims handling practices and procedures; our assessment of fees related to insufficient funds or reversed payments; interpretations of the provisions of our insurance policies; our insurance product design; certain of our premium actions, including those in response to the COVID-19 pandemic; rating practices; certain marketing, sales, services, implementation and renewal practices and procedures, including with respect to accessibility; our usage-based insurance program; certain relationships with independent insurance agents; patent matters; alleged violation of the Telephone Consumer Protection Act; commercial disputes, including breach of contract; and certain employment practices, including claims relating to pay practices and fair employment practices, among other matters. Other insurance companies face many of these same issues.

The nature and volume of litigation pending against The Progressive Corporation and/or its insurance subsidiaries is similar to that which was disclosed in Note 12 – Litigation in our 2021 Annual Report to Shareholders.

We plan to contest the pending lawsuits vigorously, but may pursue settlement negotiations in some cases, as we deem appropriate. Although outcomes of pending cases are uncertain until final disposition, we establish accruals for these lawsuits when it is probable that a loss has been or will be incurred and we can reasonably estimate potential loss exposure, which may include a range of loss. As to lawsuits for which the loss is considered neither probable nor estimable, or is considered probable but not estimable, we do not establish an accrual. Nevertheless, we continue to evaluate pending litigation to determine if any losses not deemed probable and estimable become so, at which point we would establish an accrual at our best estimate of the loss or range of loss.

With respect to our pending lawsuits that are not related to claims under insurance policies, the accruals that we have established, if any, were not material at September 30, 2022 and 2021, or December 31, 2021, and there were no material settlements during 2021 or the first nine months of 2022. For most of these lawsuits, we do not consider any losses to be both probable and estimable, and we are unable to estimate a meaningful range of loss, if any, at this time, due to the factors discussed in Note 12 – Litigation in our 2021 Annual Report to Shareholders. In the event that any one or more of these lawsuits results in a substantial judgment against us, or settlement by us, or if our accruals (if any) prove to be inadequate by a significant amount, the resulting liability could have a material adverse effect on our consolidated financial condition, cash flows, and/or results of operations. For a further discussion on our pending litigation and related reserving policies, see Note 12 – Litigation in our 2021 Annual Report to Shareholders.

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Goodwill and Intangible Assets

9 Months Ended

Sep. 30, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

Goodwill and Intangible Assets

Goodwill

The majority of the goodwill recorded as of September 30, 2022 and 2021, and December 31, 2021, related to the April 1, 2015, acquisition of a controlling interest in ARX. In the second quarter 2022, we performed an interim impairment test of our goodwill allocated to the ARX reporting unit and recorded an impairment loss of $224.8 million, which is disclosed as a separate line item in our consolidated statements of comprehensive income. The impairment loss was fully allocated to our Property segment. There were no previously recorded goodwill impairment losses on any of the outstanding goodwill.

The indicators of impairment primarily related to the magnitude of recent weather events relative to forecasted expectations, as well as other factors impacting our plans to restore our Property business to target profitability in a timely fashion and the subsequent reduced forecasted profitability of ARX.

The quantitative goodwill impairment assessment consisted of comparing the fair value of the reporting unit to its carrying value. To determine the fair value of a reporting unit, we use a discounted cash flow model. The model uses assumptions including, but not limited to, discount rate, forecasted growth, profitability, investment return, and capital requirements. The assumptions and estimates were consistent with those we believe other non-related marketplace participants would use and were based on management’s best estimates at the time of the analysis. The calculated fair value of the ARX reporting unit was below its carrying value at June 30, 2022, which resulted in recording the goodwill impairment. There was no indication of impairment on the remaining $227.9 million goodwill, of which 98% was attributable to our Personal Lines Agency business and related to the ARX acquisition.

Intangible Assets

The following table is a summary of the net carrying amount of other intangible assets:

(millions)	September 30, 2022		September 30, 2021		December 31, 2021
Intangible assets subject to amortization	$	79.4	$	119.5	$	104.9
Indefinite-lived intangible assets1	12.4		12.4		12.4
Total	$	91.8	$	131.9	$	117.3

1 Indefinite-lived intangible assets are comprised of state insurance and agent licenses. State insurance licenses were previously subject to amortization under superseded accounting guidance and have $0.6 million of accumulated amortization for all periods presented.

Intangible assets subject to amortization consisted of the following:

(millions)	September 30, 2022						September 30, 2021						December 31, 2021
Category	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Policies in force	$	0	$	0	$	0	$	256.2	$	237.9	$	18.3	$	256.2	$	247.1	$	9.1
Agency relationships	159.2		85.3		73.9		159.2		73.9		85.3		159.2		76.8		82.4
Software rights	69.1		64.8		4.3		69.1		56.2		12.9		69.1		58.3		10.8
Trade name	3.6		2.4		1.2		3.6		0.6		3.0		3.6		1.0		2.6
Total	$	231.9	$	152.5	$	79.4	$	488.1	$	368.6	$	119.5	$	488.1	$	383.2	$	104.9

Amortization expense was $5.4 million and $25.5 million for the three and nine months ended September 30, 2022, respectively, compared to $14.6 million and $43.1 million during the same periods last year. During the first quarter 2022, the policies in force intangible asset, with a gross carrying value of $256.2 million, was fully amortized.

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New Accounting Standards	9 Months Ended
	Sep. 30, 2022
Accounting Policies [Abstract]
New Accounting Standards	New Accounting Standards — We did not adopt any new accounting standards during the nine months ended September 30, 2022. We assessed the adoption impacts of recently issued accounting standards by the Financial Accounting Standards Board on our consolidated financial statements as well as material updates to previous assessments, if any, from our Annual Report on Form 10-K for the fiscal year ended December 31, 2021. There were no new material accounting standards issued in the nine months ended September 30, 2022, that are expected to impact The Progressive Corporation or its subsidiaries.

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Basis of Presentation (Policies)

9 Months Ended

Sep. 30, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Goodwill and Intangible Assets

Goodwill and Intangible AssetsWe evaluate goodwill for impairment using a qualitative or quantitative approach annually and when changes in circumstances indicate the carrying value of certain portions of goodwill may not be recoverable.

Earnings Per Common Share

Earnings per Common Share

When a net loss is reported, earnings per common share are calculated using basic average equivalent shares since diluted earnings per share would be antidilutive given the net loss reported for the period. Amounts are reported on a diluted basis for all other periods presented.

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Basis of Presentation (Tables)

9 Months Ended

Sep. 30, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Premium Receivable, Allowance for Credit Loss

The following table summarizes changes in our allowance for credit loss exposure on our premiums receivable:

	Three Months Ended September 30,				Nine Months Ended September 30,
(millions)	2022		2021		2022		2021
Allowance for credit losses, beginning of period	$	265.8	$	245.2	$	280.4	$	356.2
Allowance acquired during period1	0		0		0		3.5
Increase in allowance2	130.9		107.2		320.6		255.5
Write-offs3	(101.7)		(95.1)		(306.0)		(357.9)
Allowance for credit losses, end of period	$	295.0	$	257.3	$	295.0	$	257.3

1 Represents the amount of the allowance acquired in the Protective Insurance Corporation and subsidiaries (Protective Insurance) acquisition.

2 Represents the incremental increase in other underwriting expenses.

3 Represents portion of allowance that is reversed when premiums receivable are written off. Premiums receivable balances are written off once we have exhausted our collection efforts.

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Investments (Tables)

9 Months Ended

Sep. 30, 2022

Investments, Debt and Equity Securities [Abstract]

Schedule of Debt and Equity Securities Reconciliation

Investments — The following tables present the composition of our investment portfolio by major security type. Our securities are reported in our consolidated balance sheets at fair value. The changes in fair value for our fixed-maturity securities (other than hybrid securities) are reported as a component of accumulated other comprehensive income (loss), net of deferred income taxes, in our consolidated balance sheets. The net holding period gains (losses) reported below represent the inception-to-date changes in fair value of the securities. The changes in the net holding period gains (losses) between periods for the hybrid securities and equity securities are recorded as a component of net realized gains (losses) on securities in our consolidated statements of comprehensive income.

($ in millions)	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Net Holding Period Gains (Losses)		Fair Value		% of Total Fair Value
September 30, 2022
Available-for-sale securities:
Fixed maturities:
U.S. government obligations	$	24,260.9	$	0	$	(1,855.4)	$	0	$	22,405.5	42.8	%
State and local government obligations	2,140.9		0		(215.4)		0		1,925.5		3.7
Foreign government obligations	16.7		0		(1.4)		0		15.3		0.1
Corporate debt securities	10,119.8		0		(832.5)		(58.9)		9,228.4		17.6
Residential mortgage-backed securities	754.2		0.4		(16.5)		(15.1)		723.0		1.4
Commercial mortgage-backed securities	5,833.9		1.4		(747.4)		0		5,087.9		9.7
Other asset-backed securities	4,876.7		0		(268.9)		(1.9)		4,605.9		8.8
Redeemable preferred stocks	202.6		0		(5.6)		(15.4)		181.6		0.3
Total fixed maturities	48,205.7		1.8		(3,943.1)		(91.3)		44,173.1		84.4
Short-term investments	4,237.6		0		0		0		4,237.6		8.1
Total available-for-sale securities	52,443.3		1.8		(3,943.1)		(91.3)		48,410.7		92.5
Equity securities:
Nonredeemable preferred stocks	1,417.6		0		0		(163.2)		1,254.4		2.4
Common equities	803.7		0		0		1,861.6		2,665.3		5.1
Total equity securities	2,221.3		0		0		1,698.4		3,919.7		7.5
Total portfolio1	$	54,664.6	$	1.8	$	(3,943.1)	$	1,607.1	$	52,330.4	100.0	%

($ in millions)	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Net Holding Period Gains (Losses)		Fair Value		% of Total Fair Value
September 30, 2021
Available-for-sale securities:
Fixed maturities:
U.S. government obligations	$	21,093.1	$	144.9	$	(95.9)	$	0	$	21,142.1	40.3	%
State and local government obligations	2,123.8		48.8		(6.7)		0		2,165.9		4.1
Foreign government obligations	12.3		0		0		0		12.3		0.1
Corporate debt securities	10,556.4		314.6		(10.5)		1.2		10,861.7		20.7
Residential mortgage-backed securities	624.4		3.4		(0.9)		1.0		627.9		1.2
Commercial mortgage-backed securities	5,739.4		70.2		(20.6)		0		5,789.0		11.1
Other asset-backed securities	4,235.6		29.4		(2.8)		0		4,262.2		8.2
Redeemable preferred stocks	171.0		1.3		(0.7)		13.0		184.6		0.4
Total fixed maturities	44,556.0		612.6		(138.1)		15.2		45,045.7		86.1
Short-term investments	1,088.7		0		0		0		1,088.7		2.1
Total available-for-sale securities	45,644.7		612.6		(138.1)		15.2		46,134.4		88.2
Equity securities:
Nonredeemable preferred stocks	1,479.9		0		0		92.9		1,572.8		3.0
Common equities	1,238.4		0		0		3,341.8		4,580.2		8.8
Total equity securities	2,718.3		0		0		3,434.7		6,153.0		11.8
Total portfolio1	$	48,363.0	$	612.6	$	(138.1)	$	3,449.9	$	52,287.4	100.0	%

($ in millions)	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Net Holding Period Gains (Losses)		Fair Value		% of Total Fair Value
December 31, 2021
Available-for-sale securities:
Fixed maturities:
U.S. government obligations	$	18,586.1	$	92.9	$	(190.8)	$	0	$	18,488.2	35.9	%
State and local government obligations	2,162.6		36.7		(14.0)		0		2,185.3		4.2
Foreign government obligations	17.9		0		0		0		17.9		0.1
Corporate debt securities	10,526.2		202.6		(33.4)		(3.3)		10,692.1		20.7
Residential mortgage-backed securities	787.7		2.3		(0.6)		0.6		790.0		1.5
Commercial mortgage-backed securities	6,561.0		38.9		(64.3)		0		6,535.6		12.7
Other asset-backed securities	4,981.8		13.3		(12.4)		(0.4)		4,982.3		9.7
Redeemable preferred stocks	170.9		0.7		(0.5)		10.6		181.7		0.4
Total fixed maturities	43,794.2		387.4		(316.0)		7.5		43,873.1		85.2
Short-term investments	942.6		0		0		0		942.6		1.8
Total available-for-sale securities	44,736.8		387.4		(316.0)		7.5		44,815.7		87.0
Equity securities:
Nonredeemable preferred stocks	1,571.8		0		0		68.1		1,639.9		3.2
Common equities	1,264.1		0		0		3,794.4		5,058.5		9.8
Total equity securities	2,835.9		0		0		3,862.5		6,698.4		13.0
Total portfolio1	$	47,572.7	$	387.4	$	(316.0)	$	3,870.0	$	51,514.1	100.0	%

1 Includes $74.7 million, $399.7 million, and $143.4 million of net unsettled security purchase transactions at September 30, 2022 and 2021, and December 31, 2021, respectively, with the offsetting payable included in other liabilities.

The total fair value of the portfolio at September 30, 2022 and 2021, and December 31, 2021, included $4.2 billion, $2.9 billion, and $4.2 billion, respectively, of securities held in a consolidated, non-insurance subsidiary of the holding company, net of unsettled security transactions.

Hybrid Instruments Table

Certain securities in our fixed-maturity portfolio are accounted for as hybrid securities because they contain embedded derivatives that are not deemed to be clearly and closely related to the host investments. These securities are reported at fair value:

	September 30,
(millions)	2022		2021		December 31, 2021
Fixed Maturities:
Corporate debt securities	$	500.4	$	363.3	$	479.1
Residential mortgage-backed securities	550.8		217.0		536.2
Other asset-backed securities	51.4		104.5		89.2
Redeemable preferred stocks	133.0		133.2		130.8
Total hybrid securities	$	1,235.6	$	818.0	$	1,235.3

Investments Classified by Contractual Maturity Date

The composition of fixed maturities by maturity at September 30, 2022, was:

(millions)	Cost		Fair Value
Less than one year	$	5,461.3	$	5,321.6
One to five years	29,752.3		27,694.2
Five to ten years	12,946.4		11,119.1
Ten years or greater	45.7		38.2
Total	$	48,205.7	$	44,173.1

Schedule of Unrealized Loss on Investments

The following tables show the composition of gross unrealized losses by major security type and by the length of time that individual securities have been in a continuous unrealized loss position:

	Total No. of Sec.	Total Fair Value		Gross Unrealized Losses		Less than 12 Months					12 Months or Greater
($ in millions)						No. of Sec.	Fair Value		Unrealized Losses		No. of Sec.	Fair  Value		Unrealized Losses
September 30, 2022
U.S. government obligations	157	$	22,385.4	$	(1,855.4)	103	$	16,085.8	$	(1,095.6)	54	$	6,299.6	$	(759.8)
State and local government obligations	353	1,911.0		(215.4)		292	1,363.1		(129.8)		61	547.9		(85.6)
Foreign government obligations	1	15.3		(1.4)		1	15.3		(1.4)		0	0		0
Corporate debt securities	452	8,885.6		(832.5)		391	7,875.5		(699.0)		61	1,010.1		(133.5)
Residential mortgage-backed securities	44	165.1		(16.5)		34	126.0		(11.8)		10	39.1		(4.7)
Commercial mortgage-backed securities	234	5,074.3		(747.4)		182	3,856.0		(425.4)		52	1,218.3		(322.0)
Other asset-backed securities	277	4,544.8		(268.9)		217	3,597.1		(183.4)		60	947.7		(85.5)
Redeemable preferred stocks	4	48.6		(5.6)		3	37.7		(4.0)		1	10.9		(1.6)
Total fixed maturities	1,522	$	43,030.1	$	(3,943.1)	1,223	$	32,956.5	$	(2,550.4)	299	$	10,073.6	$	(1,392.7)

	Total No. of Sec.	Total Fair Value		Gross Unrealized Losses		Less than 12 Months					12 Months or Greater
($ in millions)						No. of Sec.	Fair Value		Unrealized Losses		No. of Sec.	Fair  Value		Unrealized Losses
September 30, 2021
U.S. government obligations	73	$	13,352.8	$	(95.9)	65	$	12,152.6	$	(70.1)	8	$	1,200.2	$	(25.8)
State and local government obligations	96	710.3		(6.7)		81	635.9		(4.9)		15	74.4		(1.8)
Corporate debt securities	227	1,581.3		(10.5)		225	1,551.5		(10.0)		2	29.8		(0.5)
Residential mortgage-backed securities	63	149.3		(0.9)		53	135.1		(0.6)		10	14.2		(0.3)
Commercial mortgage-backed securities	70	1,758.8		(20.6)		65	1,543.6		(19.9)		5	215.2		(0.7)
Other asset-backed securities	114	1,625.9		(2.8)		109	1,614.2		(2.7)		5	11.7		(0.1)
Redeemable preferred stocks	1	11.8		(0.7)		0	0		0		1	11.8		(0.7)
Total fixed maturities	644	$	19,190.2	$	(138.1)	598	$	17,632.9	$	(108.2)	46	$	1,557.3	$	(29.9)

	Total No. of Sec.	Total Fair Value		Gross Unrealized Losses		Less than 12 Months					12 Months or Greater
($ in millions)						No. of Sec.	Fair Value		Unrealized Losses		No. of Sec.	Fair  Value		Unrealized Losses
December 31, 2021
U.S. government obligations	92	$	14,745.8	$	(190.8)	85	$	13,790.8	$	(158.5)	7	$	955.0	$	(32.3)
State and local government obligations	127	954.2		(14.0)		122	927.3		(13.1)		5	26.9		(0.9)
Corporate debt securities	220	3,496.6		(33.4)		219	3,491.7		(33.3)		1	4.9		(0.1)
Residential mortgage-backed securities	20	138.6		(0.6)		14	135.4		(0.5)		6	3.2		(0.1)
Commercial mortgage-backed securities	168	4,315.4		(64.3)		165	4,295.0		(63.9)		3	20.4		(0.4)
Other asset-backed securities	178	3,204.7		(12.4)		176	3,200.6		(12.3)		2	4.1		(0.1)
Redeemable preferred stocks	1	12.0		(0.5)		0	0		0		1	12.0		(0.5)
Total fixed maturities	806	$	26,867.3	$	(316.0)	781	$	25,840.8	$	(281.6)	25	$	1,026.5	$	(34.4)

Realized Gain (Loss) on Investments

The components of net realized gains (losses) for the three and nine months ended September 30, were:

	Three Months				Nine Months
(millions)	2022		2021		2022		2021
Gross realized gains on security sales
Available-for-sale securities:
U.S. government obligations	$	0	$	19.6	$	4.6	$	97.5
State and local government obligations	0		6.0		0		50.3
Corporate and other debt securities	0.3		23.6		6.8		84.4
Residential mortgage-backed securities	0		0		0.7		0.3
Commercial mortgage-backed securities	0		1.4		0		40.7
Other asset-backed securities	0		0.3		0.1		1.0
Redeemable preferred stocks	0		0		0		1.5
Total available-for-sale securities	0.3		50.9		12.2		275.7
Equity securities:
Nonredeemable preferred stocks	0.1		2.3		17.6		26.0
Common equities	1.4		6.2		832.5		352.3
Total equity securities	1.5		8.5		850.1		378.3
Subtotal gross realized gains on security sales	1.8		59.4		862.3		654.0
Gross realized losses on security sales
Available-for-sale securities:
U.S. government obligations	0		(2.0)		(233.5)		(28.5)
State and local government obligations	0		0		(1.0)		(3.0)
Corporate and other debt securities	(14.0)		(0.7)		(51.8)		(6.1)
Residential mortgage-backed securities	0		(0.3)		0		(0.3)
Commercial mortgage-backed securities	(44.8)		(0.5)		(58.6)		(1.6)
Other asset-backed securities	0		0		(2.1)		(0.4)
Short-term investments	0		0		(0.3)		0
Total available-for-sale securities	(58.8)		(3.5)		(347.3)		(39.9)
Equity securities:
Nonredeemable preferred stocks	(5.1)		(0.3)		(7.0)		(0.7)
Common equities	0		(1.7)		(78.0)		(5.6)
Total equity securities	(5.1)		(2.0)		(85.0)		(6.3)
Subtotal gross realized losses on security sales	(63.9)		(5.5)		(432.3)		(46.2)
Net realized gains (losses) on security sales
Available-for-sale securities:
U.S. government obligations	0		17.6		(228.9)		69.0
State and local government obligations	0		6.0		(1.0)		47.3
Corporate and other debt securities	(13.7)		22.9		(45.0)		78.3
Residential mortgage-backed securities	0		(0.3)		0.7		0
Commercial mortgage-backed securities	(44.8)		0.9		(58.6)		39.1
Other asset-backed securities	0		0.3		(2.0)		0.6
Redeemable preferred stocks	0		0		0		1.5
Short-term investments	0		0		(0.3)		0
Total available-for-sale securities	(58.5)		47.4		(335.1)		235.8
Equity securities:
Nonredeemable preferred stocks	(5.0)		2.0		10.6		25.3
Common equities	1.4		4.5		754.5		346.7
Total equity securities	(3.6)		6.5		765.1		372.0
Subtotal net realized gains (losses) on security sales	(62.1)		53.9		430.0		607.8
Net holding period gains (losses)
Hybrid securities	(11.4)		1.0		(98.8)		0
Equity securities	(140.7)		(16.9)		(2,164.1)		479.8
Subtotal net holding period gains (losses)	(152.1)		(15.9)		(2,262.9)		479.8
Other asset impairment	(2.2)		(1.2)		(6.5)		(3.7)
Total net realized gains (losses) on securities	$	(216.4)	$	36.8	$	(1,839.4)	$	1,083.9

Components of Equity Realized Gains (Losses)

The following table reflects our holding period realized gains (losses) recognized on equity securities held at the respective quarter ends:

	Three Months				Nine Months
(millions)	2022		2021		2022		2021
Total net gains (losses) recognized during the period on equity securities	$	(144.3)	$	(10.4)	$	(1,399.0)	$	851.8
Less: Net gains (losses) recognized on equity securities sold during the period	(3.6)		6.5		765.1		372.0
Net holding period gains (losses) recognized during the period on equity securities held at period end	$	(140.7)	$	(16.9)	$	(2,164.1)	$	479.8

Components of Net Investment Income

The components of net investment income for the three and nine months ended September 30, were: 

	Three Months				Nine Months
(millions)	2022		2021		2022		2021
Available-for-sale securities:
Fixed maturities:
U.S. government obligations	$	86.1	$	39.0	$	205.4	$	106.8
State and local government obligations	9.8		9.7		29.3		34.6
Foreign government obligations	0.1		0		0.2		0
Corporate debt securities	71.8		70.2		215.4		228.6
Residential mortgage-backed securities	8.8		3.2		23.2		9.4
Commercial mortgage-backed securities	48.3		35.0		138.1		105.2
Other asset-backed securities	52.1		16.1		116.5		47.1
Redeemable preferred stocks	3.0		2.3		8.5		7.1
Total fixed maturities	280.0		175.5		736.6		538.8
Short-term investments	24.8		0.4		29.6		2.6
Total available-for-sale securities	304.8		175.9		766.2		541.4
Equity securities:
Nonredeemable preferred stocks	17.3		17.3		53.6		52.5
Common equities	11.5		15.7		48.4		45.9
Total equity securities	28.8		33.0		102.0		98.4
Investment income	333.6		208.9		868.2		639.8
Investment expenses	(5.8)		(6.6)		(17.4)		(18.5)
Net investment income	$	327.8	$	202.3	$	850.8	$	621.3

XML

Fair Value (Tables)

9 Months Ended

Sep. 30, 2022

Fair Value Disclosures [Abstract]

Composition of Investment Portfolio by Major Security Type

The composition of the investment portfolio by major security type and our outstanding debt was:

	Fair Value
(millions)	Level 1		Level 2		Level 3		Total		Cost
September 30, 2022
Fixed maturities:
U.S. government obligations	$	22,405.5	$	0	$	0	$	22,405.5	$	24,260.9
State and local government obligations	0		1,925.5		0		1,925.5		2,140.9
Foreign government obligations	0		15.3		0		15.3		16.7
Corporate debt securities	0		9,228.4		0		9,228.4		10,119.8
Subtotal	22,405.5		11,169.2		0		33,574.7		36,538.3
Asset-backed securities:
Residential mortgage-backed	0		723.0		0		723.0		754.2
Commercial mortgage-backed	0		5,087.9		0		5,087.9		5,833.9
Other asset-backed	0		4,605.9		0		4,605.9		4,876.7
Subtotal asset-backed securities	0		10,416.8		0		10,416.8		11,464.8
Redeemable preferred stocks:
Financials	0		39.8		0		39.8		43.6
Utilities	0		8.8		0		8.8		10.5
Industrials	8.9		124.1		0		133.0		148.5
Subtotal redeemable preferred stocks	8.9		172.7		0		181.6		202.6
Total fixed maturities	22,414.4		21,758.7		0		44,173.1		48,205.7
Short-term investments	4,219.6		18.0		0		4,237.6		4,237.6
Total available-for-sale securities	26,634.0		21,776.7		0		48,410.7		52,443.3
Equity securities:
Nonredeemable preferred stocks:
Financials	60.9		1,015.6		64.9		1,141.4		1,297.6
Utilities	0		71.3		0		71.3		79.9
Industrials	0		24.7		17.0		41.7		40.1
Subtotal nonredeemable preferred stocks	60.9		1,111.6		81.9		1,254.4		1,417.6
Common equities:
Common stocks	2,597.3		49.3		0		2,646.6		785.0
Other risk investments	0		0		18.7		18.7		18.7
Subtotal common equities	2,597.3		49.3		18.7		2,665.3		803.7
Total equity securities	2,658.2		1,160.9		100.6		3,919.7		2,221.3
Total portfolio	$	29,292.2	$	22,937.6	$	100.6	$	52,330.4	$	54,664.6
Debt	$	0	$	5,634.7	$	0	$	5,634.7	$	6,387.4

	Fair Value
(millions)	Level 1		Level 2		Level 3		Total		Cost
September 30, 2021
Fixed maturities:
U.S. government obligations	$	21,142.1	$	0	$	0	$	21,142.1	$	21,093.1
State and local government obligations	0		2,165.9		0		2,165.9		2,123.8
Foreign government obligations	0		12.3		0		12.3		12.3
Corporate debt securities	0		10,861.7		0		10,861.7		10,556.4
Subtotal	21,142.1		13,039.9		0		34,182.0		33,785.6
Asset-backed securities:
Residential mortgage-backed	0		627.9		0		627.9		624.4
Commercial mortgage-backed	0		5,789.0		0		5,789.0		5,739.4
Other asset-backed	0		4,262.2		0		4,262.2		4,235.6
Subtotal asset-backed securities	0		10,679.1		0		10,679.1		10,599.4
Redeemable preferred stocks:
Financials	0		51.4		0		51.4		50.8
Utilities	0		0		0		0		0
Industrials	10.6		122.6		0		133.2		120.2
Subtotal redeemable preferred stocks	10.6		174.0		0		184.6		171.0
Total fixed maturities	21,152.7		23,893.0		0		45,045.7		44,556.0
Short-term investments	1,078.5		10.2		0		1,088.7		1,088.7
Total available-for-sale securities	22,231.2		23,903.2		0		46,134.4		45,644.7
Equity securities:
Nonredeemable preferred stocks:
Financials	89.8		1,304.6		76.4		1,470.8		1,399.8
Utilities	0		42.1		0		42.1		40.0
Industrials	0		25.5		34.4		59.9		40.1
Subtotal nonredeemable preferred stocks	89.8		1,372.2		110.8		1,572.8		1,479.9
Common equities:
Common stocks	4,513.1		0		54.5		4,567.6		1,225.8
Other risk investments	0		0		12.6		12.6		12.6
Subtotal common equities	4,513.1		0		67.1		4,580.2		1,238.4
Total equity securities	4,602.9		1,372.2		177.9		6,153.0		2,718.3
Total portfolio	$	26,834.1	$	25,275.4	$	177.9	$	52,287.4	$	48,363.0
Debt	$	0	$	5,881.7	$	0	$	5,881.7	$	4,898.2

	Fair Value
(millions)	Level 1		Level 2		Level 3		Total		Cost
December 31, 2021
Fixed maturities:
U.S. government obligations	$	18,488.2	$	0	$	0	$	18,488.2	$	18,586.1
State and local government obligations	0		2,185.3		0		2,185.3		2,162.6
Foreign government obligations	0		17.9		0		17.9		17.9
Corporate debt securities	0		10,692.1		0		10,692.1		10,526.2
Subtotal	18,488.2		12,895.3		0		31,383.5		31,292.8
Asset-backed securities:
Residential mortgage-backed	0		790.0		0		790.0		787.7
Commercial mortgage-backed	0		6,535.6		0		6,535.6		6,561.0
Other asset-backed	0		4,982.3		0		4,982.3		4,981.8
Subtotal asset-backed securities	0		12,307.9		0		12,307.9		12,330.5
Redeemable preferred stocks:
Financials	0		50.9		0		50.9		50.7
Utilities	0		0		0		0		0
Industrials	10.7		120.1		0		130.8		120.2
Subtotal redeemable preferred stocks	10.7		171.0		0		181.7		170.9
Total fixed maturities	18,498.9		25,374.2		0		43,873.1		43,794.2
Short-term investments	942.4		0.2		0		942.6		942.6
Total available-for-sale securities	19,441.3		25,374.4		0		44,815.7		44,736.8
Equity securities:
Nonredeemable preferred stocks:
Financials	115.3		1,305.7		76.4		1,497.4		1,451.7
Utilities	0		82.9		0		82.9		80.0
Industrials	0		25.2		34.4		59.6		40.1
Subtotal nonredeemable preferred stocks	115.3		1,413.8		110.8		1,639.9		1,571.8
Common equities:
Common stocks	4,991.6		50.0		0		5,041.6		1,247.2
Other risk investments	0		0		16.9		16.9		16.9
Subtotal common equities	4,991.6		50.0		16.9		5,058.5		1,264.1
Total equity securities	5,106.9		1,463.8		127.7		6,698.4		2,835.9
Total portfolio	$	24,548.2	$	26,838.2	$	127.7	$	51,514.1	$	47,572.7
Debt	$	0	$	5,857.4	$	0	$	5,857.4	$	4,898.8

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation

The following tables provide a summary of changes in fair value associated with Level 3 assets for the three and nine months ended September 30, 2022 and 2021:

	Level 3 Fair Value
(millions)	Fair Value at June 30, 2022		Calls/ Maturities/ Paydowns/Other		Purchases		Sales		Net Realized (Gain)/Loss on Sales		Change in Valuation		Net Transfers In (Out)		Fair Value at September 30, 2022
Equity securities:
Nonredeemable preferred stocks:
Financials	$	64.9	$	0	$	0	$	0	$	0	$	0	$	0	$	64.9
Industrials	17.0		0		0		0		0		0		0		17.0
Common equities:
Other risk investments	18.5		0.2		0		0		0		0		0		18.7
Total Level 3 securities	$	100.4	$	0.2	$	0	$	0	$	0	$	0	$	0	$	100.6
	Level 3 Fair Value
(millions)	Fair Value at June 30, 2021		Calls/ Maturities/ Paydowns/Other		Purchases		Sales		Net Realized (Gain)/Loss on Sales		Change in Valuation		Net Transfers In (Out)		Fair Value at September 30, 2021
Equity securities:
Nonredeemable preferred stocks:
Financials	$	76.4	$	0	$	0	$	0	$	0	$	0	$	0	$	76.4
Industrials	34.4		0		0		0		0		0		0		34.4
Common equities:
Common stocks	52.5		0		2.0		0		0		0		0		54.5
Other risk investments	11.6		1.0		0		0		0		0		0		12.6
Total Level 3 securities	$	174.9	$	1.0	$	2.0	$	0	$	0	$	0	$	0	$	177.9
	Level 3 Fair Value
(millions)	Fair Value at Dec. 31, 2021		Calls/ Maturities/ Paydowns/Other		Purchases		Sales		Net Realized (Gain)/Loss on Sales		Change in Valuation		Net Transfers In (Out)		Fair Value at September 30, 2022
Equity securities:
Nonredeemable preferred stocks:
Financials	$	76.4	$	0	$	0	$	(15.0)	$	(17.2)	$	20.7	$	0	$	64.9
Industrials	34.4		(0.5)		0		0		0		(16.9)		0		17.0
Common equities:
Other risk investments	16.9		1.8		0		0		0		0		0		18.7
Total Level 3 securities	$	127.7	$	1.3	$	0	$	(15.0)	$	(17.2)	$	3.8	$	0	$	100.6

	Level 3 Fair Value
(millions)	Fair Value at Dec. 31, 2020		Calls/ Maturities/ Paydowns/Other		Purchases		Sales		Net Realized (Gain)/Loss on Sales		Change in Valuation		Net Transfers In (Out)		Fair Value at September 30, 2021
Equity securities:
Nonredeemable preferred stocks:
Financials	$	10.0	$	0	$	60.2	$	0	$	0	$	6.2	$	0	$	76.4
Industrials	16.7		0		5.0		(5.0)		(4.5)		22.2		0		34.4
Common equities:
Common stocks	25.0		0		2.0		0		0		27.5		0		54.5
Other risk investments	3.1		9.5		0		0		0		0		0		12.6
Total Level 3 securities	$	54.8	$	9.5	$	67.2	$	(5.0)	$	(4.5)	$	55.9	$	0	$	177.9

Fair Value Measurement Inputs and Valuation Techniques

The following tables provide a summary of the quantitative information about Level 3 fair value measurements for our applicable securities at September 30, 2022 and 2021, and December 31, 2021:

	Quantitative Information about Level 3 Fair Value Measurements
($ in millions)	Fair Value at September 30, 2022		Valuation Technique	Unobservable Input	Range of Input Values Increase (Decrease)	Weighted Average Increase (Decrease)
Equity securities:
Nonredeemable preferred stocks	$	81.9	Market comparables	Weighted average market capitalization price change %	(20.7)% to (1.1)%	(6.6)	%
Subtotal Level 3 securities	81.9
Pricing exemption securities	18.7
Total Level 3 securities	$	100.6

	Quantitative Information about Level 3 Fair Value Measurements
($ in millions)	Fair Value at September 30, 2021		Valuation Technique	Unobservable Input	Range of Input Values Increase (Decrease)	Weighted Average Increase (Decrease)
Equity securities:
Nonredeemable preferred stocks	$	110.8	Market comparables	Weighted average market capitalization price change %	(8.5)% to 19.8%	6.5	%
Common stocks	54.5		Market comparables	Weighted average market capitalization price change %	(1.6)% to 55.8%	0.9	%
Subtotal Level 3 securities	165.3
Pricing exemption securities	12.6
Total Level 3 securities	$	177.9

	Quantitative Information about Level 3 Fair Value Measurements
($ in millions)	Fair Value at Dec. 31, 2021		Valuation Technique	Unobservable Input	Range of Input Values Increase (Decrease)	Weighted Average Increase (Decrease)
Equity securities:
Nonredeemable preferred stocks	$	110.8	Market comparables	Weighted average market capitalization price change %	(20.2)% to (2.3)%	(7.7)%
Subtotal Level 3 securities	110.8
Pricing exemption securities	16.9
Total Level 3 securities	$	127.7

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Debt (Tables)

9 Months Ended

Sep. 30, 2022

Debt Disclosure [Abstract]

Debt Table

Debt at each of the balance sheet periods consisted of:

	September 30, 2022				September 30, 2021				December 31, 2021
(millions)	Carrying Value		Fair Value		Carrying Value		Fair Value		Carrying Value		Fair Value
2.45% Senior Notes due 2027 (issued: $500.0, August 2016)	$	498.1	$	459.7	$	497.6	$	530.6	$	497.7	$	517.9
2.50% Senior Notes due 2027 (issued: $500.0, March 2022)	497.4		451.6		0		0		0		0
6 5/8% Senior Notes due 2029 (issued: $300.0, March 1999)	297.4		322.1		297.1		390.9		297.2		388.2
4.00% Senior Notes due 2029 (issued: $550.0, October 2018)	546.3		519.5		545.8		627.9		545.9		621.0
3.20% Senior Notes due 2030 (issued: $500.0, March 2020)	496.8		439.3		496.4		543.2		496.5		536.3
3.00% Senior Notes due 2032 (issued: $500.0, March 2022)	495.8		418.8		0		0		0		0
6.25% Senior Notes due 2032 (issued: $400.0, November 2002)	396.4		426.0		396.1		545.5		396.2		547.9
4.35% Senior Notes due 2044 (issued: $350.0, April 2014)	346.9		298.5		346.8		433.6		346.8		428.4
3.70% Senior Notes due 2045 (issued: $400.0, January 2015)	395.7		305.7		395.6		456.2		395.6		447.1
4.125% Senior Notes due 2047 (issued: $850.0, April 2017)	842.0		710.3		841.9		1,018.5		841.9		1,029.3
4.20% Senior Notes due 2048 (issued: $600.0, March 2018)	590.3		505.9		590.2		736.3		590.2		741.3
3.95% Senior Notes due 2050 (issued: $500.0, March 2020)	490.9		396.6		490.7		599.0		490.8		600.0
3.70% Senior Notes due 2052 (issued: $500.0, March 2022)	493.4		380.7		0		0		0		0
Total	$	6,387.4	$	5,634.7	$	4,898.2	$	5,881.7	$	4,898.8	$	5,857.4

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Income Taxes (Tables)

9 Months Ended

Sep. 30, 2022

Income Tax Disclosure [Abstract]

Schedule of Effective Income Tax Rate Reconciliation

The provision for income taxes differed from the statutory rate as follows:

	Three Months Ended September 30,								Nine Months Ended September 30,
($ in millions)	2022				2021				2022				2021
Income (loss) before income taxes	$	142.5			$	139.0			$	(103.2)			$	3,006.1
Tax at statutory federal rate	$	29.9	21.0	%	$	29.2	21.0	%	$	(21.7)	21.0	%	$	631.3	21.0	%
Tax effect of:
Goodwill impairment	0		0		0		0		47.2		(45.7)		0		0
Stock-based compensation	(9.6)		(6.7)		(7.9)		(5.7)		(17.7)		17.2		(19.2)		(0.6)
State income taxes, net of federal taxes	4.5		3.2		5.5		4.0		9.7		(9.4)		17.7		0.6
Tax-preferenced investment income	(2.8)		(2.0)		(3.3)		(2.4)		(9.5)		9.2		(10.0)		(0.3)
Tax credits	(5.2)		(3.6)		(3.7)		(2.7)		(9.4)		9.1		(6.1)		(0.2)
Nondeductible compensation expense	1.8		1.3		1.9		1.4		5.4		(5.2)		5.6		0.2
Tax deductible dividends	(0.4)		(0.3)		(0.5)		(0.4)		(1.4)		1.4		(1.6)		(0.1)
Other items, net	0.2		0		(0.7)		(0.5)		(0.9)		0.8		(0.2)		(0.1)
Total income tax provision	$	18.4	12.9	%	$	20.5	14.7	%	$	1.7	(1.6)	%	$	617.5	20.5	%

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Loss and Loss Adjustment Expense Reserves (Tables)

9 Months Ended

Sep. 30, 2022

Loss and Loss Adjustment Expenses Reserves [Abstract]

Schedule of Liability for Unpaid Claims and Claims Adjustment Expense

Activity in the loss and loss adjustment expense reserves is summarized as follows:

	September 30,
(millions)	2022		2021
Balance at January 1	$	26,164.1	$	20,265.8
Less reinsurance recoverables on unpaid losses	4,733.6		3,798.2
Net balance at January 1	21,430.5		16,467.6
Net loss and loss adjustment expense reserves acquired1	0		732.5
Total beginning reserves	21,430.5		17,200.1
Incurred related to:
Current year	28,245.4		24,610.8
Prior years	52.8		156.8
Total incurred	28,298.2		24,767.6
Paid related to:
Current year	15,712.4		13,650.6
Prior years	9,418.5		7,213.3
Total paid	25,130.9		20,863.9
Net balance at September 30	24,597.8		21,103.8
Plus reinsurance recoverables on unpaid losses	6,034.0		4,822.5
Balance at September 30	$	30,631.8	$	25,926.3

1 Net reserves acquired in the Protective Insurance acquisition.

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Supplemental Cash Flow Information (Tables)

9 Months Ended

Sep. 30, 2022

Supplemental Cash Flow Elements [Abstract]

Schedule of Supplemental Cash Flow Information, Non Cash Activity

Non-cash activity included the following in the respective periods:

	Nine Months Ended September 30,
(millions)	2022		2021
Common share dividends1	$	58.5	$	58.5
Operating lease liabilities2	29.7		79.5

1 Declared but unpaid. See Note 9 – Dividends for further discussion.

2 From obtaining right-of-use assets.

Supplemental Cash Flow Information Table

We paid the following in the respective periods: 

	Nine Months Ended September 30,
(millions)	2022		2021
Income taxes	$	595.9	$	669.5
Interest	191.3		186.3
Operating lease liabilities	62.5		67.8

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Segment Information (Tables)

9 Months Ended

Sep. 30, 2022

Segment Reporting [Abstract]

Reconciliation of Revenue and operating Income from Segments to Consolidated

Following are the operating results for the respective periods:

	Three Months Ended September 30,								Nine Months Ended September 30,
	2022				2021				2022				2021
(millions)	Revenues		Pretax Profit (Loss)		Revenues		Pretax Profit (Loss)		Revenues		Pretax Profit (Loss)		Revenues		Pretax Profit (Loss)
Personal Lines
Agency	$	4,441.9	$	(41.3)	$	4,267.9	$	41.0	$	13,131.7	$	507.6	$	12,586.4	$	796.0
Direct	5,077.4		40.6		4,690.2		(62.4)		14,776.9		389.4		13,755.8		480.6
Total Personal Lines1	9,519.3		(0.7)		8,958.1		(21.4)		27,908.6		897.0		26,342.2		1,276.6
Commercial Lines	2,317.9		238.1		1,877.4		197.5		6,749.5		683.5		4,917.0		556.1
Property2	561.0		(141.0)		526.5		(222.7)		1,689.6		(289.6)		1,501.3		(376.7)
Other indemnity3	0.7		(2.1)		2.8		(0.3)		2.0		(9.3)		6.8		(0.2)
Total underwriting operations	12,398.9		94.3		11,364.8		(46.9)		36,349.7		1,281.6		32,767.3		1,455.8
Fees and other revenues4	181.4		NA		174.9		NA		531.9		NA		516.8		NA
Service businesses	82.7		(0.1)		73.8		1.0		230.5		9.0		202.1		12.1
Investments5	117.2		111.4		245.7		239.1		(971.2)		(988.6)		1,723.7		1,705.2
Interest expense	NA		(63.1)		NA		(54.2)		NA		(180.4)		NA		(167.0)
Property - Goodwill impairment2	NA		0		NA		0		NA		(224.8)		NA		0
Consolidated total	$	12,780.2	$	142.5	$	11,859.2	$	139.0	$	36,140.9	$	(103.2)	$	35,209.9	$	3,006.1

NA = Not applicable

1 Personal auto products accounted for 94% of the total Personal Lines segment net premiums earned during the three and nine months ended September 30, 2022 and 2021; our special lines products (e.g., motorcycles, ATVs, RVs, watercraft, and snowmobiles) accounted for the balance of the Personal Lines net premiums earned.

2 The total pretax loss, including goodwill impairment, for the Property segment was $514.4 million for the nine months ended September 30, 2022. For the three and nine months ended September 30, 2022, pretax profit (loss) also included $5.0 million and $24.1 million, respectively, of amortization expense associated with acquisition-related intangible assets attributable to our Property segment, and $14.2 million and $42.5 million for the same periods in 2021.

See Note 12 – Goodwill and Intangible Assets for further discussion.

3 Primarily includes run-off business operations.

4 Pretax profit (loss) for fees and other revenues is allocated to operating segments.

5 Revenues represent recurring investment income and total net realized gains (losses) on securities; pretax profit (loss) is net of investment expense.

Underwriting Margins and Combined Ratios for our Underwriting Operations

Following are the underwriting margins and combined ratios for our underwriting operations for the respective periods:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2022			2021			2022			2021
	Under-writing Margin		Combined Ratio	Under-writing Margin		Combined Ratio	Under-writing Margin		Combined Ratio	Under-writing Margin		Combined Ratio
Personal Lines
Agency	(0.9)	%	100.9	1.0	%	99.0	3.9	%	96.1	6.3	%	93.7
Direct	0.8		99.2	(1.3)		101.3	2.6		97.4	3.5		96.5
Total Personal Lines	0		100.0	(0.2)		100.2	3.2		96.8	4.9		95.1
Commercial Lines	10.3		89.7	10.5		89.5	10.1		89.9	11.3		88.7
Property1	(25.1)		125.1	(42.3)		142.3	(17.1)		117.1	(25.1)		125.1
Total underwriting operations	0.8		99.2	(0.4)		100.4	3.5		96.5	4.4		95.6

1 Included in the three and nine months ended September 30, 2022, is 0.9 points and 1.4 points, respectively, of amortization expense associated with intangible assets and 2.7 points and 2.8 points, respectively, for the same periods in 2021.

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Dividends (Tables)

9 Months Ended

Sep. 30, 2022

Dividends [Abstract]

Dividends

Following is a summary of our common and preferred share dividends that were declared and/or paid during the nine months ended September 30, 2022 and 2021:

(millions, except per share amounts)		Amount
Declared	Payable	Per Share		Accrued/Paid1
Common - Quarterly Dividends:
August 2022	October 2022	$	0.10	$	58.5
May 2022	July 2022	0.10		58.5
March 2022	April 2022	0.10		58.5
December 2021	January 2022	0.10		58.5
August 2021	October 2021	0.10		58.5
May 2021	July 2021	0.10		58.5
March 2021	April 2021	0.10		58.5
December 2020	January 2021	0.10		58.6
Common - Annual Variable Dividends:
December 2020	January 2021	4.50		2,635.9
Preferred Dividends:
August 2022	September 2022	26.875		13.4
December 2021	March 2022	26.875		13.4
August 2021	September 2021	26.875		13.4
December 2020	March 2021	26.875		13.4

1 The common share dividend accrual is based on an estimate of common shares outstanding as of the record date and all accruals are recorded as a part of accounts payable, accrued expenses, and other liabilities on the consolidated balance sheets until paid.

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Other Comprehensive Income (Loss) (Tables)

9 Months Ended

Sep. 30, 2022

Equity [Abstract]

Components of Other Comprehensive Income (Loss)

The components of other comprehensive income (loss), including reclassification adjustments by income statement line item, were as follows: 

							Components of Changes in Accumulated Other Comprehensive Income (after tax)
(millions)	Pretax total accumulated other comprehensive income (loss)		Total tax (provision) benefit		After tax total accumulated other comprehensive income (loss)		Total net unrealized gains  (losses) on securities		Net unrealized losses on forecasted transactions		Foreign currency translation adjustment
Balance at June 30, 2022	$	(2,795.5)	$	586.5	$	(2,209.0)	$	(2,193.5)	$	(14.7)	$	(0.8)
Other comprehensive income (loss) before reclassifications:
Investment securities	(1,223.3)		256.9		(966.4)		(966.4)		0		0
Foreign currency translation adjustment	(0.9)		0.2		(0.7)		0		0		(0.7)
Total other comprehensive income (loss) before reclassifications	(1,224.2)		257.1		(967.1)		(966.4)		0		(0.7)
Less: Reclassification adjustment for amounts realized in net income by income statement line item:
Net realized gains (losses) on securities	(58.4)		12.3		(46.1)		(46.1)		0		0
Interest expense	(0.2)		0.1		(0.1)		0		(0.1)		0
Total reclassification adjustment for amounts realized in net income	(58.6)		12.4		(46.2)		(46.1)		(0.1)		0
Total other comprehensive income (loss)	(1,165.6)		244.7		(920.9)		(920.3)		0.1		(0.7)
Balance at September 30, 2022	$	(3,961.1)	$	831.2	$	(3,129.9)	$	(3,113.8)	$	(14.6)	$	(1.5)

							Components of Changes in Accumulated Other Comprehensive Income (after tax)
(millions)	Pretax total accumulated other comprehensive income (loss)		Total tax (provision) benefit		After tax total accumulated other comprehensive income (loss)		Total net unrealized gains  (losses) on securities		Net unrealized losses on forecasted transactions		Foreign currency translation adjustment
Balance at June 30, 2021	$	619.6	$	(136.4)	$	483.2	$	498.8	$	(15.1)	$	(0.5)
Other comprehensive income (loss) before reclassifications:
Investment securities	(117.9)		24.8		(93.1)		(93.1)		0		0
Foreign currency translation adjustment	(0.3)		0.1		(0.2)		0		0		(0.2)
Total other comprehensive income (loss) before reclassifications	(118.2)		24.9		(93.3)		(93.1)		0		(0.2)
Less: Reclassification adjustment for amounts realized in net income by income statement line item:
Net realized gains (losses) on securities	46.4		(9.7)		36.7		36.7		0		0
Interest expense	(0.2)		0.1		(0.1)		0		(0.1)		0
Total reclassification adjustment for amounts realized in net income	46.2		(9.6)		36.6		36.7		(0.1)		0
Total other comprehensive income (loss)	(164.4)		34.5		(129.9)		(129.8)		0.1		(0.2)
Balance at September 30, 2021	$	455.2	$	(101.9)	$	353.3	$	369.0	$	(15.0)	$	(0.7)
							Components of Changes in Accumulated Other Comprehensive Income (after tax)
(millions)	Pretax total accumulated other comprehensive income (loss)		Total tax (provision) benefit		After tax total accumulated other comprehensive income (loss)		Total net unrealized gains  (losses) on securities		Net unrealized losses on forecasted transactions		Foreign currency translation adjustment
Balance at December 31, 2021	$	52.3	$	(11.6)	$	40.7	$	56.2	$	(14.9)	$	(0.6)
Other comprehensive income (loss) before reclassifications:
Investment securities	(4,321.7)		907.6		(3,414.1)		(3,414.1)		0		0
Foreign currency translation adjustment	(1.1)		0.2		(0.9)		0		0		(0.9)
Total other comprehensive income (loss) before reclassifications	(4,322.8)		907.8		(3,415.0)		(3,414.1)		0		(0.9)
Less: Reclassification adjustment for amounts realized in net income by income statement line item:
Net realized gains (losses) on securities	(309.0)		64.9		(244.1)		(244.1)		0		0
Interest expense	(0.4)		0.1		(0.3)		0		(0.3)		0
Total reclassification adjustment for amounts realized in net income	(309.4)		65.0		(244.4)		(244.1)		(0.3)		0
Total other comprehensive income (loss)	(4,013.4)		842.8		(3,170.6)		(3,170.0)		0.3		(0.9)
Balance at September 30, 2022	$	(3,961.1)	$	831.2	$	(3,129.9)	$	(3,113.8)	$	(14.6)	$	(1.5)

							Components of Changes in Accumulated Other Comprehensive Income (after tax)
(millions)	Pretax total accumulated other comprehensive income (loss)		Total tax (provision) benefit		After tax total accumulated other comprehensive income (loss)		Total net unrealized gains  (losses) on securities		Net unrealized losses on forecasted transactions		Foreign currency translation adjustment
Balance at December 31, 2020	$	1,187.4	$	(255.7)	$	931.7	$	947.3	$	(15.6)	$	0
Other comprehensive income (loss) before reclassifications:
Investment securities	(494.6)		103.9		(390.7)		(390.7)		0		0
Foreign currency translation adjustment	(0.9)		0.2		(0.7)		0		0		(0.7)
Total other comprehensive income (loss) before reclassifications	(495.5)		104.1		(391.4)		(390.7)		0		(0.7)
Less: Reclassification adjustment for amounts realized in net income by income statement line item:
Net realized gains (losses) on securities	237.5		(49.9)		187.6		187.6		0		0
Interest expense	(0.8)		0.2		(0.6)		0		(0.6)		0
Total reclassification adjustment for amounts realized in net income	236.7		(49.7)		187.0		187.6		(0.6)		0
Total other comprehensive income (loss)	(732.2)		153.8		(578.4)		(578.3)		0.6		(0.7)
Balance at September 30, 2021	$	455.2	$	(101.9)	$	353.3	$	369.0	$	(15.0)	$	(0.7)

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Goodwill and Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Indefinite-Lived Intangible Assets

The following table is a summary of the net carrying amount of other intangible assets:

(millions)	September 30, 2022		September 30, 2021		December 31, 2021
Intangible assets subject to amortization	$	79.4	$	119.5	$	104.9
Indefinite-lived intangible assets1	12.4		12.4		12.4
Total	$	91.8	$	131.9	$	117.3

1 Indefinite-lived intangible assets are comprised of state insurance and agent licenses. State insurance licenses were previously subject to amortization under superseded accounting guidance and have $0.6 million of accumulated amortization for all periods presented.

Intangible Assets Subject to Amortization

The following table is a summary of the net carrying amount of other intangible assets:

(millions)	September 30, 2022		September 30, 2021		December 31, 2021
Intangible assets subject to amortization	$	79.4	$	119.5	$	104.9
Indefinite-lived intangible assets1	12.4		12.4		12.4
Total	$	91.8	$	131.9	$	117.3

1 Indefinite-lived intangible assets are comprised of state insurance and agent licenses. State insurance licenses were previously subject to amortization under superseded accounting guidance and have $0.6 million of accumulated amortization for all periods presented.

Intangible assets subject to amortization consisted of the following:

(millions)	September 30, 2022						September 30, 2021						December 31, 2021
Category	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Policies in force	$	0	$	0	$	0	$	256.2	$	237.9	$	18.3	$	256.2	$	247.1	$	9.1
Agency relationships	159.2		85.3		73.9		159.2		73.9		85.3		159.2		76.8		82.4
Software rights	69.1		64.8		4.3		69.1		56.2		12.9		69.1		58.3		10.8
Trade name	3.6		2.4		1.2		3.6		0.6		3.0		3.6		1.0		2.6
Total	$	231.9	$	152.5	$	79.4	$	488.1	$	368.6	$	119.5	$	488.1	$	383.2	$	104.9

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Basis of Presentation - Reporting and Accounting Policies - Allowance for Credit Loss (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Allowance for Credit Loss [Abstract]
Allowance for credit losses, beginning of period	$ 265.8	$ 245.2	$ 280.4	$ 356.2
Allowance acquired during period	0.0	0.0	0.0	3.5
Increase in allowance	130.9	107.2	320.6	255.5
Write-offs	(101.7)	(95.1)	(306.0)	(357.9)
Allowance for credit losses, end of period	$ 295.0	$ 257.3	$ 295.0	$ 257.3

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Basis of Presentation - Additional Information (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Assets held-for-sale	$ 47.4	$ 10.8	$ 12.6

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Investments - Investment Portfolio by Major Security Type (Detail) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Debt Securities, Available-for-Sale, at Fair Value
Cost	$ 52,443.3	$ 44,736.8	$ 45,644.7
Gross Unrealized Gains	1.8	387.4	612.6
Gross Unrealized Losses	(3,943.1)	(316.0)	(138.1)
Net Holding Period Gains (Losses)	(91.3)	7.5	15.2
Total available-for-sale securities	$ 48,410.7	$ 44,815.7	$ 46,134.4
% of Total Fair Value	92.50%	87.00%	88.20%
Equity securities, at Fair Value
Cost	$ 2,221.3	$ 2,835.9	$ 2,718.3
Gross Unrealized Gains	0.0	0.0	0.0
Gross Unrealized Losses	0.0	0.0	0.0
Net Holding Period Gains (Losses)	1,698.4	3,862.5	3,434.7
Fair Value	$ 3,919.7	$ 6,698.4	$ 6,153.0
% of Total Fair Value	7.50%	13.00%	11.80%
Debt and Equity Securities, at Fair Value
Cost	$ 54,664.6	$ 47,572.7	$ 48,363.0
Gross Unrealized Gains	1.8	387.4	612.6
Gross Unrealized Losses	(3,943.1)	(316.0)	(138.1)
Net Holding Period Gains (Losses)	1,607.1	3,870.0	3,449.9
Fair Value	$ 52,330.4	$ 51,514.1	$ 52,287.4
% of Total Fair Value	100.00%	100.00%	100.00%
Unsettled security transactions, payable	$ 74.7	$ 143.4	$ 399.7
Total fair value of non-insurance subsidiary portfolio	4,200.0	4,200.0	2,900.0
Nonredeemable preferred stocks
Equity securities, at Fair Value
Cost	1,417.6	1,571.8	1,479.9
Gross Unrealized Gains	0.0	0.0	0.0
Gross Unrealized Losses	0.0	0.0	0.0
Net Holding Period Gains (Losses)	(163.2)	68.1	92.9
Fair Value	$ 1,254.4	$ 1,639.9	$ 1,572.8
% of Total Fair Value	2.40%	3.20%	3.00%
Common equities
Equity securities, at Fair Value
Cost	$ 803.7	$ 1,264.1	$ 1,238.4
Gross Unrealized Gains	0.0	0.0	0.0
Gross Unrealized Losses	0.0	0.0	0.0
Net Holding Period Gains (Losses)	1,861.6	3,794.4	3,341.8
Fair Value	$ 2,665.3	$ 5,058.5	$ 4,580.2
% of Total Fair Value	5.10%	9.80%	8.80%
Total fixed maturities
Debt Securities, Available-for-Sale, at Fair Value
Cost	$ 48,205.7	$ 43,794.2	$ 44,556.0
Gross Unrealized Gains	1.8	387.4	612.6
Gross Unrealized Losses	(3,943.1)	(316.0)	(138.1)
Net Holding Period Gains (Losses)	(91.3)	7.5	15.2
Total available-for-sale securities	$ 44,173.1	$ 43,873.1	$ 45,045.7
% of Total Fair Value	84.40%	85.20%	86.10%
Total fixed maturities | U.S. government obligations
Debt Securities, Available-for-Sale, at Fair Value
Cost	$ 24,260.9	$ 18,586.1	$ 21,093.1
Gross Unrealized Gains	0.0	92.9	144.9
Gross Unrealized Losses	(1,855.4)	(190.8)	(95.9)
Net Holding Period Gains (Losses)	0.0	0.0	0.0
Total available-for-sale securities	$ 22,405.5	$ 18,488.2	$ 21,142.1
% of Total Fair Value	42.80%	35.90%	40.30%
Total fixed maturities | State and local government obligations
Debt Securities, Available-for-Sale, at Fair Value
Cost	$ 2,140.9	$ 2,162.6	$ 2,123.8
Gross Unrealized Gains	0.0	36.7	48.8
Gross Unrealized Losses	(215.4)	(14.0)	(6.7)
Net Holding Period Gains (Losses)	0.0	0.0	0.0
Total available-for-sale securities	$ 1,925.5	$ 2,185.3	$ 2,165.9
% of Total Fair Value	3.70%	4.20%	4.10%
Total fixed maturities | Foreign government obligations
Debt Securities, Available-for-Sale, at Fair Value
Cost	$ 16.7	$ 17.9	$ 12.3
Gross Unrealized Gains	0.0	0.0	0.0
Gross Unrealized Losses	(1.4)	0.0	0.0
Net Holding Period Gains (Losses)	0.0	0.0	0.0
Total available-for-sale securities	$ 15.3	$ 17.9	$ 12.3
% of Total Fair Value	0.10%	0.10%	0.10%
Total fixed maturities | Corporate debt securities
Debt Securities, Available-for-Sale, at Fair Value
Cost	$ 10,119.8	$ 10,526.2	$ 10,556.4
Gross Unrealized Gains	0.0	202.6	314.6
Gross Unrealized Losses	(832.5)	(33.4)	(10.5)
Net Holding Period Gains (Losses)	(58.9)	(3.3)	1.2
Total available-for-sale securities	$ 9,228.4	$ 10,692.1	$ 10,861.7
% of Total Fair Value	17.60%	20.70%	20.70%
Total fixed maturities | Residential mortgage-backed securities
Debt Securities, Available-for-Sale, at Fair Value
Cost	$ 754.2	$ 787.7	$ 624.4
Gross Unrealized Gains	0.4	2.3	3.4
Gross Unrealized Losses	(16.5)	(0.6)	(0.9)
Net Holding Period Gains (Losses)	(15.1)	0.6	1.0
Total available-for-sale securities	$ 723.0	$ 790.0	$ 627.9
% of Total Fair Value	1.40%	1.50%	1.20%
Total fixed maturities | Commercial mortgage-backed securities
Debt Securities, Available-for-Sale, at Fair Value
Cost	$ 5,833.9	$ 6,561.0	$ 5,739.4
Gross Unrealized Gains	1.4	38.9	70.2
Gross Unrealized Losses	(747.4)	(64.3)	(20.6)
Net Holding Period Gains (Losses)	0.0	0.0	0.0
Total available-for-sale securities	$ 5,087.9	$ 6,535.6	$ 5,789.0
% of Total Fair Value	9.70%	12.70%	11.10%
Total fixed maturities | Other asset-backed securities
Debt Securities, Available-for-Sale, at Fair Value
Cost	$ 4,876.7	$ 4,981.8	$ 4,235.6
Gross Unrealized Gains	0.0	13.3	29.4
Gross Unrealized Losses	(268.9)	(12.4)	(2.8)
Net Holding Period Gains (Losses)	(1.9)	(0.4)	0.0
Total available-for-sale securities	$ 4,605.9	$ 4,982.3	$ 4,262.2
% of Total Fair Value	8.80%	9.70%	8.20%
Total fixed maturities | Redeemable preferred stocks
Debt Securities, Available-for-Sale, at Fair Value
Cost	$ 202.6	$ 170.9	$ 171.0
Gross Unrealized Gains	0.0	0.7	1.3
Gross Unrealized Losses	(5.6)	(0.5)	(0.7)
Net Holding Period Gains (Losses)	(15.4)	10.6	13.0
Total available-for-sale securities	$ 181.6	$ 181.7	$ 184.6
% of Total Fair Value	0.30%	0.40%	0.40%
Short-term investments
Debt Securities, Available-for-Sale, at Fair Value
Cost	$ 4,237.6	$ 942.6	$ 1,088.7
Gross Unrealized Gains	0.0	0.0	0.0
Gross Unrealized Losses	0.0	0.0	0.0
Net Holding Period Gains (Losses)	0.0	0.0	0.0
Total available-for-sale securities	$ 4,237.6	$ 942.6	$ 1,088.7
% of Total Fair Value	8.10%	1.80%	2.10%

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Investments - Hybrid Securities (Detail) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Hybrid Instruments [Line Items]
Hybrid securities	$ 1,235.6	$ 1,235.3	$ 818.0
Corporate debt securities
Hybrid Instruments [Line Items]
Hybrid securities	500.4	479.1	363.3
Residential mortgage-backed securities
Hybrid Instruments [Line Items]
Hybrid securities	550.8	536.2	217.0
Other asset-backed securities
Hybrid Instruments [Line Items]
Hybrid securities	51.4	89.2	104.5
Redeemable preferred stocks
Hybrid Instruments [Line Items]
Hybrid securities	$ 133.0	$ 130.8	$ 133.2

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Investments - Composition of Fixed Maturities by Maturity (Detail) - Total fixed maturities $ in Millions	Sep. 30, 2022 USD ($)
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost [Abstract]
Less than one year	$ 5,461.3
One to five years	29,752.3
Five to ten years	12,946.4
Ten years or greater	45.7
Cost	48,205.7
Fair Value
Less than one year	5,321.6
One to five years	27,694.2
Five to ten years	11,119.1
Ten years or greater	38.2
Fair Value	$ 44,173.1

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Investments - Gross Unrealized losses by Major Security (Detail) $ in Millions	Sep. 30, 2022 USD ($) security	Dec. 31, 2021 USD ($) security	Sep. 30, 2021 USD ($) security
Number of Securities
Total | security	1,522	806	644
Less than 12 Months | security	1,223	781	598
12 Months or Greater | security	299	25	46
Fair Value
Total	$ 43,030.1	$ 26,867.3	$ 19,190.2
Less than 12 Months	32,956.5	25,840.8	17,632.9
12 Months or Greater	10,073.6	1,026.5	1,557.3
Unrealized Losses
Total	(3,943.1)	(316.0)	(138.1)
Less than 12 Months	(2,550.4)	(281.6)	(108.2)
12 Months or Greater	$ (1,392.7)	$ (34.4)	$ (29.9)
U.S. government obligations
Number of Securities
Total | security	157	92	73
Less than 12 Months | security	103	85	65
12 Months or Greater | security	54	7	8
Fair Value
Total	$ 22,385.4	$ 14,745.8	$ 13,352.8
Less than 12 Months	16,085.8	13,790.8	12,152.6
12 Months or Greater	6,299.6	955.0	1,200.2
Unrealized Losses
Total	(1,855.4)	(190.8)	(95.9)
Less than 12 Months	(1,095.6)	(158.5)	(70.1)
12 Months or Greater	$ (759.8)	$ (32.3)	$ (25.8)
State and local government obligations
Number of Securities
Total | security	353	127	96
Less than 12 Months | security	292	122	81
12 Months or Greater | security	61	5	15
Fair Value
Total	$ 1,911.0	$ 954.2	$ 710.3
Less than 12 Months	1,363.1	927.3	635.9
12 Months or Greater	547.9	26.9	74.4
Unrealized Losses
Total	(215.4)	(14.0)	(6.7)
Less than 12 Months	(129.8)	(13.1)	(4.9)
12 Months or Greater	$ (85.6)	$ (0.9)	$ (1.8)
Foreign government obligations
Number of Securities
Total | security	1
Less than 12 Months | security	1
12 Months or Greater | security	0
Fair Value
Total	$ 15.3
Less than 12 Months	15.3
12 Months or Greater	0.0
Unrealized Losses
Total	(1.4)
Less than 12 Months	(1.4)
12 Months or Greater	$ 0.0
Corporate debt securities
Number of Securities
Total | security	452	220	227
Less than 12 Months | security	391	219	225
12 Months or Greater | security	61	1	2
Fair Value
Total	$ 8,885.6	$ 3,496.6	$ 1,581.3
Less than 12 Months	7,875.5	3,491.7	1,551.5
12 Months or Greater	1,010.1	4.9	29.8
Unrealized Losses
Total	(832.5)	(33.4)	(10.5)
Less than 12 Months	(699.0)	(33.3)	(10.0)
12 Months or Greater	$ (133.5)	$ (0.1)	$ (0.5)
Residential mortgage-backed securities
Number of Securities
Total | security	44	20	63
Less than 12 Months | security	34	14	53
12 Months or Greater | security	10	6	10
Fair Value
Total	$ 165.1	$ 138.6	$ 149.3
Less than 12 Months	126.0	135.4	135.1
12 Months or Greater	39.1	3.2	14.2
Unrealized Losses
Total	(16.5)	(0.6)	(0.9)
Less than 12 Months	(11.8)	(0.5)	(0.6)
12 Months or Greater	$ (4.7)	$ (0.1)	$ (0.3)
Commercial mortgage-backed securities
Number of Securities
Total | security	234	168	70
Less than 12 Months | security	182	165	65
12 Months or Greater | security	52	3	5
Fair Value
Total	$ 5,074.3	$ 4,315.4	$ 1,758.8
Less than 12 Months	3,856.0	4,295.0	1,543.6
12 Months or Greater	1,218.3	20.4	215.2
Unrealized Losses
Total	(747.4)	(64.3)	(20.6)
Less than 12 Months	(425.4)	(63.9)	(19.9)
12 Months or Greater	$ (322.0)	$ (0.4)	$ (0.7)
Other asset-backed securities
Number of Securities
Total | security	277	178	114
Less than 12 Months | security	217	176	109
12 Months or Greater | security	60	2	5
Fair Value
Total	$ 4,544.8	$ 3,204.7	$ 1,625.9
Less than 12 Months	3,597.1	3,200.6	1,614.2
12 Months or Greater	947.7	4.1	11.7
Unrealized Losses
Total	(268.9)	(12.4)	(2.8)
Less than 12 Months	(183.4)	(12.3)	(2.7)
12 Months or Greater	$ (85.5)	$ (0.1)	$ (0.1)
Redeemable preferred stocks
Number of Securities
Total | security	4	1	1
Less than 12 Months | security	3	0	0
12 Months or Greater | security	1	1	1
Fair Value
Total	$ 48.6	$ 12.0	$ 11.8
Less than 12 Months	37.7	0.0	0.0
12 Months or Greater	10.9	12.0	11.8
Unrealized Losses
Total	(5.6)	(0.5)	(0.7)
Less than 12 Months	(4.0)	0.0	0.0
12 Months or Greater	$ (1.6)	$ (0.5)	$ (0.7)

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Investments - Components of Net Realized Gains (Losses) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Gain (Loss) on Securities [Line Items]
Debt Securities, Available-for-Sale, Gross Realized Gains on Sales	$ 0.3	$ 50.9	$ 12.2	$ 275.7
Equity Securities, FV-NI, Gross Realized Gains on Sales	1.5	8.5	850.1	378.3
Debt and Equity Securities, Gross Realized Gains on Sales	1.8	59.4	862.3	654.0
Debt Securities, Available-for-Sale, Realized Loss	(58.8)	(3.5)	(347.3)	(39.9)
Equity Securities, FV-NI, Gross Realized Losses on Sales	(5.1)	(2.0)	(85.0)	(6.3)
Debt and Equity Securities, Gross Realized Losses on Sales	(63.9)	(5.5)	(432.3)	(46.2)
Debt Securities, Available-for-Sale, Realized Gain (Loss) on Sales, Excluding Other-than-Temporary Impairment	(58.5)	47.4	(335.1)	235.8
Equity Securities, FV-NI, Net Realized Gain (Loss) on Sales	(3.6)	6.5	765.1	372.0
Net realized gains (losses) on security sales	(62.1)	53.9	430.0	607.8
Unrealized Gain (Loss) on Hybrid Instrument, Net	(11.4)	1.0	(98.8)	0.0
Equity Securities, FV-NI, Unrealized Gain (Loss)	(140.7)	(16.9)	(2,164.1)	479.8
Net holding period gains (losses) on securities	(152.1)	(15.9)	(2,262.9)	479.8
Net impairment losses recognized in earnings	(2.2)	(1.2)	(6.5)	(3.7)
Total net realized gains (losses) on securities	(216.4)	36.8	(1,839.4)	1,083.9
Other Assets
Gain (Loss) on Securities [Line Items]
Net impairment losses recognized in earnings	(2.2)	(1.2)	(6.5)	(3.7)
U.S. government obligations
Gain (Loss) on Securities [Line Items]
Debt Securities, Available-for-Sale, Gross Realized Gains on Sales	0.0	19.6	4.6	97.5
Debt Securities, Available-for-Sale, Realized Loss	0.0	(2.0)	(233.5)	(28.5)
Debt Securities, Available-for-Sale, Realized Gain (Loss) on Sales, Excluding Other-than-Temporary Impairment	0.0	17.6	(228.9)	69.0
State and local government obligations
Gain (Loss) on Securities [Line Items]
Debt Securities, Available-for-Sale, Gross Realized Gains on Sales	0.0	6.0	0.0	50.3
Debt Securities, Available-for-Sale, Realized Loss	0.0	0.0	(1.0)	(3.0)
Debt Securities, Available-for-Sale, Realized Gain (Loss) on Sales, Excluding Other-than-Temporary Impairment	0.0	6.0	(1.0)	47.3
Corporate debt securities
Gain (Loss) on Securities [Line Items]
Debt Securities, Available-for-Sale, Gross Realized Gains on Sales	0.3	23.6	6.8	84.4
Debt Securities, Available-for-Sale, Realized Loss	(14.0)	(0.7)	(51.8)	(6.1)
Debt Securities, Available-for-Sale, Realized Gain (Loss) on Sales, Excluding Other-than-Temporary Impairment	(13.7)	22.9	(45.0)	78.3
Residential mortgage-backed securities
Gain (Loss) on Securities [Line Items]
Debt Securities, Available-for-Sale, Gross Realized Gains on Sales	0.0	0.0	0.7	0.3
Debt Securities, Available-for-Sale, Realized Loss	0.0	(0.3)	0.0	(0.3)
Debt Securities, Available-for-Sale, Realized Gain (Loss) on Sales, Excluding Other-than-Temporary Impairment	0.0	(0.3)	0.7	0.0
Commercial mortgage-backed securities
Gain (Loss) on Securities [Line Items]
Debt Securities, Available-for-Sale, Gross Realized Gains on Sales	0.0	1.4	0.0	40.7
Debt Securities, Available-for-Sale, Realized Loss	(44.8)	(0.5)	(58.6)	(1.6)
Debt Securities, Available-for-Sale, Realized Gain (Loss) on Sales, Excluding Other-than-Temporary Impairment	(44.8)	0.9	(58.6)	39.1
Other asset-backed securities
Gain (Loss) on Securities [Line Items]
Debt Securities, Available-for-Sale, Gross Realized Gains on Sales	0.0	0.3	0.1	1.0
Debt Securities, Available-for-Sale, Realized Loss	0.0	0.0	(2.1)	(0.4)
Debt Securities, Available-for-Sale, Realized Gain (Loss) on Sales, Excluding Other-than-Temporary Impairment	0.0	0.3	(2.0)	0.6
Redeemable preferred stocks
Gain (Loss) on Securities [Line Items]
Debt Securities, Available-for-Sale, Gross Realized Gains on Sales	0.0	0.0	0.0	1.5
Debt Securities, Available-for-Sale, Realized Gain (Loss) on Sales, Excluding Other-than-Temporary Impairment	0.0	0.0	0.0	1.5
Short-term investments
Gain (Loss) on Securities [Line Items]
Debt Securities, Available-for-Sale, Realized Loss	0.0	0.0	(0.3)	0.0
Debt Securities, Available-for-Sale, Realized Gain (Loss) on Sales, Excluding Other-than-Temporary Impairment	0.0	0.0	(0.3)	0.0
Nonredeemable preferred stocks
Gain (Loss) on Securities [Line Items]
Equity Securities, FV-NI, Gross Realized Gains on Sales	0.1	2.3	17.6	26.0
Equity Securities, FV-NI, Gross Realized Losses on Sales	(5.1)	(0.3)	(7.0)	(0.7)
Equity Securities, FV-NI, Net Realized Gain (Loss) on Sales	(5.0)	2.0	10.6	25.3
Common equities
Gain (Loss) on Securities [Line Items]
Equity Securities, FV-NI, Gross Realized Gains on Sales	1.4	6.2	832.5	352.3
Equity Securities, FV-NI, Gross Realized Losses on Sales	0.0	(1.7)	(78.0)	(5.6)
Equity Securities, FV-NI, Net Realized Gain (Loss) on Sales	$ 1.4	$ 4.5	$ 754.5	$ 346.7

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Investments - Components of Equity Realized Gains (Losses) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Investments, Debt and Equity Securities [Abstract]
Realized Investment Gains (Losses)	$ (144.3)	$ (10.4)	$ (1,399.0)	$ 851.8
Equity Securities, FV-NI, Net Realized Gain (Loss) on Sales	(3.6)	6.5	765.1	372.0
Equity Securities, FV-NI, Unrealized Gain (Loss)	$ (140.7)	$ (16.9)	$ (2,164.1)	$ 479.8

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Investments - Components of Net Investment Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Net Investment Income [Line Items]
Gross investment income	$ 333.6	$ 208.9	$ 868.2	$ 639.8
Investment expenses	(5.8)	(6.6)	(17.4)	(18.5)
Net Investment Income	327.8	202.3	850.8	621.3
Available-for-sale Securities
Net Investment Income [Line Items]
Gross investment income	304.8	175.9	766.2	541.4
Total equity securities
Net Investment Income [Line Items]
Gross investment income	28.8	33.0	102.0	98.4
Total equity securities | Nonredeemable preferred stocks
Net Investment Income [Line Items]
Gross investment income	17.3	17.3	53.6	52.5
Total equity securities | Common equities
Net Investment Income [Line Items]
Gross investment income	11.5	15.7	48.4	45.9
Total fixed maturities
Net Investment Income [Line Items]
Gross investment income	280.0	175.5	736.6	538.8
Total fixed maturities | U.S. government obligations
Net Investment Income [Line Items]
Gross investment income	86.1	39.0	205.4	106.8
Total fixed maturities | State and local government obligations
Net Investment Income [Line Items]
Gross investment income	9.8	9.7	29.3	34.6
Total fixed maturities | Foreign government obligations
Net Investment Income [Line Items]
Gross investment income	0.1	0.0	0.2	0.0
Total fixed maturities | Corporate debt securities
Net Investment Income [Line Items]
Gross investment income	71.8	70.2	215.4	228.6
Total fixed maturities | Residential mortgage-backed securities
Net Investment Income [Line Items]
Gross investment income	8.8	3.2	23.2	9.4
Total fixed maturities | Commercial mortgage-backed securities
Net Investment Income [Line Items]
Gross investment income	48.3	35.0	138.1	105.2
Total fixed maturities | Other asset-backed securities
Net Investment Income [Line Items]
Gross investment income	52.1	16.1	116.5	47.1
Total fixed maturities | Redeemable preferred stocks
Net Investment Income [Line Items]
Gross investment income	3.0	2.3	8.5	7.1
Short-term investments
Net Investment Income [Line Items]
Gross investment income	$ 24.8	$ 0.4	$ 29.6	$ 2.6

XML

Investments - Additional Information (Detail)	3 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2022 USD ($) security	Sep. 30, 2022 USD ($) security	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Schedule of Debt and Equity Securities [Line Items]
Principal amount of bonds and certificates of deposit	$ 468,700,000	$ 468,700,000
Securities Exceeding 10% of Shareholders' Equity	0	0	$ 0	$ 0
Non-Income Producing Securities	0	0
Open reverse repurchase commitments	0	0	0	0
Securities Sold under Agreements to Repurchase	0	0	0	0
Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value, Downgraded in Period	99,300,000	99,300,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Downgraded in Period	23,700,000	23,700,000
Debt Securities, Available-for-sale, Allowance for Credit Loss, Not Previously Recorded		0	0
Debt Securities, Available-for-sale, Allowance for Credit Loss	$ 0	0	0	0
Debt Securities, Available-for-sale, Allowance for Credit Loss, Writeoff		$ 0	$ 0	$ 0
Percent Change in Investment Income	60.00%	36.00%
Percent Change in Book Yield	39.00%	16.00%
Corporate debt securities
Schedule of Debt and Equity Securities [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions Downgraded | security	5	5

XML

Fair Value - Composition of Investment Portfolio by Major Security Type (Detail) - USD ($)	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	$ 52,330,400,000	$ 51,514,100,000	$ 52,287,400,000
Fair Value	5,634,700,000	5,857,400,000	5,881,700,000
Available-for-sale Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	48,410,700,000	44,815,700,000	46,134,400,000
Available-for-sale Securities | Total fixed maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	44,173,100,000	43,873,100,000	45,045,700,000
Available-for-sale Securities | Total fixed maturities | Debt Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	33,574,700,000	31,383,500,000	34,182,000,000
Available-for-sale Securities | Total fixed maturities | Debt Securities | U.S. government obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	22,405,500,000	18,488,200,000	21,142,100,000
Available-for-sale Securities | Total fixed maturities | Debt Securities | State and local government obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	1,925,500,000	2,185,300,000	2,165,900,000
Available-for-sale Securities | Total fixed maturities | Debt Securities | Foreign government obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	15,300,000	17,900,000	12,300,000
Available-for-sale Securities | Total fixed maturities | Debt Securities | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	9,228,400,000	10,692,100,000	10,861,700,000
Available-for-sale Securities | Total fixed maturities | Asset-backed Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	10,416,800,000	12,307,900,000	10,679,100,000
Available-for-sale Securities | Total fixed maturities | Asset-backed Securities | Residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	723,000,000.0	790,000,000.0	627,900,000
Available-for-sale Securities | Total fixed maturities | Asset-backed Securities | Commercial mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	5,087,900,000	6,535,600,000	5,789,000,000
Available-for-sale Securities | Total fixed maturities | Asset-backed Securities | Other asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	4,605,900,000	4,982,300,000	4,262,200,000
Available-for-sale Securities | Total fixed maturities | Redeemable preferred stocks
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	181,600,000	181,700,000	184,600,000
Available-for-sale Securities | Total fixed maturities | Redeemable preferred stocks | Financials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	39,800,000	50,900,000	51,400,000
Available-for-sale Securities | Total fixed maturities | Redeemable preferred stocks | Utilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	8,800,000	0	0
Available-for-sale Securities | Total fixed maturities | Redeemable preferred stocks | Industrials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	133,000,000.0	130,800,000	133,200,000
Available-for-sale Securities | Short-term investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	4,237,600,000	942,600,000	1,088,700,000
Total equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	3,919,700,000	6,698,400,000	6,153,000,000
Total equity securities | Nonredeemable preferred stocks
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	1,254,400,000	1,639,900,000	1,572,800,000
Total equity securities | Nonredeemable preferred stocks | Financials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	1,141,400,000	1,497,400,000	1,470,800,000
Total equity securities | Nonredeemable preferred stocks | Utilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	71,300,000	82,900,000	42,100,000
Total equity securities | Nonredeemable preferred stocks | Industrials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	41,700,000	59,600,000	59,900,000
Total equity securities | Common equities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	2,665,300,000	5,058,500,000	4,580,200,000
Total equity securities | Common equities | Common Stocks, excluding Other Risk
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	2,646,600,000	5,041,600,000	4,567,600,000
Total equity securities | Common equities | Other risk investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	18,700,000	16,900,000	12,600,000
Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	29,292,200,000	24,548,200,000	26,834,100,000
Fair Value	0	0	0
Fair Value, Inputs, Level 1 | Available-for-sale Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	26,634,000,000	19,441,300,000	22,231,200,000
Fair Value, Inputs, Level 1 | Available-for-sale Securities | Total fixed maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	22,414,400,000	18,498,900,000	21,152,700,000
Fair Value, Inputs, Level 1 | Available-for-sale Securities | Total fixed maturities | Debt Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	22,405,500,000	18,488,200,000	21,142,100,000
Fair Value, Inputs, Level 1 | Available-for-sale Securities | Total fixed maturities | Debt Securities | U.S. government obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	22,405,500,000	18,488,200,000	21,142,100,000
Fair Value, Inputs, Level 1 | Available-for-sale Securities | Total fixed maturities | Debt Securities | State and local government obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	0	0	0
Fair Value, Inputs, Level 1 | Available-for-sale Securities | Total fixed maturities | Debt Securities | Foreign government obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	0	0	0
Fair Value, Inputs, Level 1 | Available-for-sale Securities | Total fixed maturities | Debt Securities | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	0	0	0
Fair Value, Inputs, Level 1 | Available-for-sale Securities | Total fixed maturities | Asset-backed Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	0	0	0
Fair Value, Inputs, Level 1 | Available-for-sale Securities | Total fixed maturities | Asset-backed Securities | Residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	0	0	0
Fair Value, Inputs, Level 1 | Available-for-sale Securities | Total fixed maturities | Asset-backed Securities | Commercial mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	0	0	0
Fair Value, Inputs, Level 1 | Available-for-sale Securities | Total fixed maturities | Asset-backed Securities | Other asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	0	0	0
Fair Value, Inputs, Level 1 | Available-for-sale Securities | Total fixed maturities | Redeemable preferred stocks
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	8,900,000	10,700,000	10,600,000
Fair Value, Inputs, Level 1 | Available-for-sale Securities | Total fixed maturities | Redeemable preferred stocks | Financials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	0	0	0
Fair Value, Inputs, Level 1 | Available-for-sale Securities | Total fixed maturities | Redeemable preferred stocks | Utilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	0	0	0
Fair Value, Inputs, Level 1 | Available-for-sale Securities | Total fixed maturities | Redeemable preferred stocks | Industrials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	8,900,000	10,700,000	10,600,000
Fair Value, Inputs, Level 1 | Available-for-sale Securities | Short-term investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	4,219,600,000	942,400,000	1,078,500,000
Fair Value, Inputs, Level 1 | Total equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	2,658,200,000	5,106,900,000	4,602,900,000
Fair Value, Inputs, Level 1 | Total equity securities | Nonredeemable preferred stocks
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	60,900,000	115,300,000	89,800,000
Fair Value, Inputs, Level 1 | Total equity securities | Nonredeemable preferred stocks | Financials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	60,900,000	115,300,000	89,800,000
Fair Value, Inputs, Level 1 | Total equity securities | Nonredeemable preferred stocks | Utilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	0	0	0
Fair Value, Inputs, Level 1 | Total equity securities | Nonredeemable preferred stocks | Industrials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	0	0	0
Fair Value, Inputs, Level 1 | Total equity securities | Common equities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	2,597,300,000	4,991,600,000	4,513,100,000
Fair Value, Inputs, Level 1 | Total equity securities | Common equities | Common Stocks, excluding Other Risk
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	2,597,300,000	4,991,600,000	4,513,100,000
Fair Value, Inputs, Level 1 | Total equity securities | Common equities | Other risk investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	0	0	0
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	22,937,600,000	26,838,200,000	25,275,400,000
Fair Value	5,634,700,000	5,857,400,000	5,881,700,000
Fair Value, Inputs, Level 2 | Available-for-sale Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	21,776,700,000	25,374,400,000	23,903,200,000
Fair Value, Inputs, Level 2 | Available-for-sale Securities | Total fixed maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	21,758,700,000	25,374,200,000	23,893,000,000
Fair Value, Inputs, Level 2 | Available-for-sale Securities | Total fixed maturities | Debt Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	11,169,200,000	12,895,300,000	13,039,900,000
Fair Value, Inputs, Level 2 | Available-for-sale Securities | Total fixed maturities | Debt Securities | U.S. government obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	0	0	0
Fair Value, Inputs, Level 2 | Available-for-sale Securities | Total fixed maturities | Debt Securities | State and local government obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	1,925,500,000	2,185,300,000	2,165,900,000
Fair Value, Inputs, Level 2 | Available-for-sale Securities | Total fixed maturities | Debt Securities | Foreign government obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	15,300,000	17,900,000	12,300,000
Fair Value, Inputs, Level 2 | Available-for-sale Securities | Total fixed maturities | Debt Securities | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	9,228,400,000	10,692,100,000	10,861,700,000
Fair Value, Inputs, Level 2 | Available-for-sale Securities | Total fixed maturities | Asset-backed Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	10,416,800,000	12,307,900,000	10,679,100,000
Fair Value, Inputs, Level 2 | Available-for-sale Securities | Total fixed maturities | Asset-backed Securities | Residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	723,000,000.0	790,000,000.0	627,900,000
Fair Value, Inputs, Level 2 | Available-for-sale Securities | Total fixed maturities | Asset-backed Securities | Commercial mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	5,087,900,000	6,535,600,000	5,789,000,000
Fair Value, Inputs, Level 2 | Available-for-sale Securities | Total fixed maturities | Asset-backed Securities | Other asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	4,605,900,000	4,982,300,000	4,262,200,000
Fair Value, Inputs, Level 2 | Available-for-sale Securities | Total fixed maturities | Redeemable preferred stocks
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	172,700,000	171,000,000.0	174,000,000.0
Fair Value, Inputs, Level 2 | Available-for-sale Securities | Total fixed maturities | Redeemable preferred stocks | Financials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	39,800,000	50,900,000	51,400,000
Fair Value, Inputs, Level 2 | Available-for-sale Securities | Total fixed maturities | Redeemable preferred stocks | Utilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	8,800,000	0	0
Fair Value, Inputs, Level 2 | Available-for-sale Securities | Total fixed maturities | Redeemable preferred stocks | Industrials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	124,100,000	120,100,000	122,600,000
Fair Value, Inputs, Level 2 | Available-for-sale Securities | Short-term investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	18,000,000.0	200,000	10,200,000
Fair Value, Inputs, Level 2 | Total equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	1,160,900,000	1,463,800,000	1,372,200,000
Fair Value, Inputs, Level 2 | Total equity securities | Nonredeemable preferred stocks
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	1,111,600,000	1,413,800,000	1,372,200,000
Fair Value, Inputs, Level 2 | Total equity securities | Nonredeemable preferred stocks | Financials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	1,015,600,000	1,305,700,000	1,304,600,000
Fair Value, Inputs, Level 2 | Total equity securities | Nonredeemable preferred stocks | Utilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	71,300,000	82,900,000	42,100,000
Fair Value, Inputs, Level 2 | Total equity securities | Nonredeemable preferred stocks | Industrials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	24,700,000	25,200,000	25,500,000
Fair Value, Inputs, Level 2 | Total equity securities | Common equities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	49,300,000	50,000,000.0	0
Fair Value, Inputs, Level 2 | Total equity securities | Common equities | Common Stocks, excluding Other Risk
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	49,300,000	50,000,000.0	0
Fair Value, Inputs, Level 2 | Total equity securities | Common equities | Other risk investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	0	0	0
Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	100,600,000	127,700,000	177,900,000
Fair Value	0	0	0
Fair Value, Inputs, Level 3 | Available-for-sale Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	0	0	0
Fair Value, Inputs, Level 3 | Available-for-sale Securities | Total fixed maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	0	0	0
Fair Value, Inputs, Level 3 | Available-for-sale Securities | Total fixed maturities | Debt Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	0	0	0
Fair Value, Inputs, Level 3 | Available-for-sale Securities | Total fixed maturities | Debt Securities | U.S. government obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	0	0	0
Fair Value, Inputs, Level 3 | Available-for-sale Securities | Total fixed maturities | Debt Securities | State and local government obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	0	0	0
Fair Value, Inputs, Level 3 | Available-for-sale Securities | Total fixed maturities | Debt Securities | Foreign government obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	0	0	0
Fair Value, Inputs, Level 3 | Available-for-sale Securities | Total fixed maturities | Debt Securities | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	0	0	0
Fair Value, Inputs, Level 3 | Available-for-sale Securities | Total fixed maturities | Asset-backed Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	0	0	0
Fair Value, Inputs, Level 3 | Available-for-sale Securities | Total fixed maturities | Asset-backed Securities | Residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	0	0	0
Fair Value, Inputs, Level 3 | Available-for-sale Securities | Total fixed maturities | Asset-backed Securities | Commercial mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	0	0	0
Fair Value, Inputs, Level 3 | Available-for-sale Securities | Total fixed maturities | Asset-backed Securities | Other asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	0	0	0
Fair Value, Inputs, Level 3 | Available-for-sale Securities | Total fixed maturities | Redeemable preferred stocks
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	0	0	0
Fair Value, Inputs, Level 3 | Available-for-sale Securities | Total fixed maturities | Redeemable preferred stocks | Financials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	0	0	0
Fair Value, Inputs, Level 3 | Available-for-sale Securities | Total fixed maturities | Redeemable preferred stocks | Utilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	0	0	0
Fair Value, Inputs, Level 3 | Available-for-sale Securities | Total fixed maturities | Redeemable preferred stocks | Industrials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	0	0	0
Fair Value, Inputs, Level 3 | Available-for-sale Securities | Short-term investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	0	0	0
Fair Value, Inputs, Level 3 | Total equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	100,600,000	127,700,000	177,900,000
Fair Value, Inputs, Level 3 | Total equity securities | Nonredeemable preferred stocks
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	81,900,000	110,800,000	110,800,000
Fair Value, Inputs, Level 3 | Total equity securities | Nonredeemable preferred stocks | Financials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	64,900,000	76,400,000	76,400,000
Fair Value, Inputs, Level 3 | Total equity securities | Nonredeemable preferred stocks | Utilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	0	0	0
Fair Value, Inputs, Level 3 | Total equity securities | Nonredeemable preferred stocks | Industrials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	17,000,000.0	34,400,000	34,400,000
Fair Value, Inputs, Level 3 | Total equity securities | Common equities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	18,700,000	16,900,000	67,100,000
Fair Value, Inputs, Level 3 | Total equity securities | Common equities | Common Stocks, excluding Other Risk
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	0	0	54,500,000
Fair Value, Inputs, Level 3 | Total equity securities | Common equities | Other risk investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	18,700,000	16,900,000	12,600,000
Carrying (Reported) Amount, Fair Value Disclosure
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	54,664,600,000	47,572,700,000	48,363,000,000
Long-term Debt	6,387,400,000	4,898,800,000	4,898,200,000
Carrying (Reported) Amount, Fair Value Disclosure | Available-for-sale Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	52,443,300,000	44,736,800,000	45,644,700,000
Carrying (Reported) Amount, Fair Value Disclosure | Available-for-sale Securities | Total fixed maturities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	48,205,700,000	43,794,200,000	44,556,000,000
Carrying (Reported) Amount, Fair Value Disclosure | Available-for-sale Securities | Total fixed maturities | Debt Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	36,538,300,000	31,292,800,000	33,785,600,000
Carrying (Reported) Amount, Fair Value Disclosure | Available-for-sale Securities | Total fixed maturities | Debt Securities | U.S. government obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	24,260,900,000	18,586,100,000	21,093,100,000
Carrying (Reported) Amount, Fair Value Disclosure | Available-for-sale Securities | Total fixed maturities | Debt Securities | State and local government obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	2,140,900,000	2,162,600,000	2,123,800,000
Carrying (Reported) Amount, Fair Value Disclosure | Available-for-sale Securities | Total fixed maturities | Debt Securities | Foreign government obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	16,700,000	17,900,000	12,300,000
Carrying (Reported) Amount, Fair Value Disclosure | Available-for-sale Securities | Total fixed maturities | Debt Securities | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	10,119,800,000	10,526,200,000	10,556,400,000
Carrying (Reported) Amount, Fair Value Disclosure | Available-for-sale Securities | Total fixed maturities | Asset-backed Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	11,464,800,000	12,330,500,000	10,599,400,000
Carrying (Reported) Amount, Fair Value Disclosure | Available-for-sale Securities | Total fixed maturities | Asset-backed Securities | Residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	754,200,000	787,700,000	624,400,000
Carrying (Reported) Amount, Fair Value Disclosure | Available-for-sale Securities | Total fixed maturities | Asset-backed Securities | Commercial mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	5,833,900,000	6,561,000,000	5,739,400,000
Carrying (Reported) Amount, Fair Value Disclosure | Available-for-sale Securities | Total fixed maturities | Asset-backed Securities | Other asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	4,876,700,000	4,981,800,000	4,235,600,000
Carrying (Reported) Amount, Fair Value Disclosure | Available-for-sale Securities | Total fixed maturities | Redeemable preferred stocks
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	202,600,000	170,900,000	171,000,000.0
Carrying (Reported) Amount, Fair Value Disclosure | Available-for-sale Securities | Total fixed maturities | Redeemable preferred stocks | Financials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	43,600,000	50,700,000	50,800,000
Carrying (Reported) Amount, Fair Value Disclosure | Available-for-sale Securities | Total fixed maturities | Redeemable preferred stocks | Utilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	10,500,000	0	0
Carrying (Reported) Amount, Fair Value Disclosure | Available-for-sale Securities | Total fixed maturities | Redeemable preferred stocks | Industrials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	148,500,000	120,200,000	120,200,000
Carrying (Reported) Amount, Fair Value Disclosure | Available-for-sale Securities | Short-term investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	4,237,600,000	942,600,000	1,088,700,000
Carrying (Reported) Amount, Fair Value Disclosure | Total equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	2,221,300,000	2,835,900,000	2,718,300,000
Carrying (Reported) Amount, Fair Value Disclosure | Total equity securities | Nonredeemable preferred stocks
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	1,417,600,000	1,571,800,000	1,479,900,000
Carrying (Reported) Amount, Fair Value Disclosure | Total equity securities | Nonredeemable preferred stocks | Financials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	1,297,600,000	1,451,700,000	1,399,800,000
Carrying (Reported) Amount, Fair Value Disclosure | Total equity securities | Nonredeemable preferred stocks | Utilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	79,900,000	80,000,000.0	40,000,000.0
Carrying (Reported) Amount, Fair Value Disclosure | Total equity securities | Nonredeemable preferred stocks | Industrials
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	40,100,000	40,100,000	40,100,000
Carrying (Reported) Amount, Fair Value Disclosure | Total equity securities | Common equities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	803,700,000	1,264,100,000	1,238,400,000
Carrying (Reported) Amount, Fair Value Disclosure | Total equity securities | Common equities | Common Stocks, excluding Other Risk
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	785,000,000.0	1,247,200,000	1,225,800,000
Carrying (Reported) Amount, Fair Value Disclosure | Total equity securities | Common equities | Other risk investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value	$ 18,700,000	$ 16,900,000	$ 12,600,000

XML

Fair Value - Summary of Changes in Fair Value Associated with Level 3 Assets (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, beginning balance	$ 100.4	$ 174.9	$ 127.7	$ 54.8
Calls/ Maturities/ Paydowns	0.2	1.0	1.3	9.5
Purchases	0.0	2.0	0.0	67.2
Sales	0.0	0.0	(15.0)	(5.0)
Net Realized (Gain)/Loss on Sales	0.0	0.0	(17.2)	(4.5)
Change in Valuation	0.0	0.0	3.8	55.9
Net Transfers In (Out)	0.0	0.0	0.0	0.0
Fair value, ending balance	100.6	177.9	100.6	177.9
Total equity securities | Financials | Nonredeemable preferred stocks
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, beginning balance	64.9	76.4	76.4	10.0
Calls/ Maturities/ Paydowns	0.0	0.0	0.0	0.0
Purchases	0.0	0.0	0.0	60.2
Sales	0.0	0.0	(15.0)	0.0
Net Realized (Gain)/Loss on Sales	0.0	0.0	(17.2)	0.0
Change in Valuation	0.0	0.0	20.7	6.2
Net Transfers In (Out)	0.0	0.0	0.0	0.0
Fair value, ending balance	64.9	76.4	64.9	76.4
Total equity securities | Industrials | Nonredeemable preferred stocks
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, beginning balance	17.0	34.4	34.4	16.7
Calls/ Maturities/ Paydowns	0.0	0.0	(0.5)	0.0
Purchases	0.0	0.0	0.0	5.0
Sales	0.0	0.0	0.0	(5.0)
Net Realized (Gain)/Loss on Sales	0.0	0.0	0.0	(4.5)
Change in Valuation	0.0	0.0	(16.9)	22.2
Net Transfers In (Out)	0.0	0.0	0.0	0.0
Fair value, ending balance	17.0	34.4	17.0	34.4
Total equity securities | Common Stocks, excluding Other Risk | Common equities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, beginning balance		52.5		25.0
Calls/ Maturities/ Paydowns		0.0		0.0
Purchases		2.0		2.0
Sales		0.0		0.0
Net Realized (Gain)/Loss on Sales		0.0		0.0
Change in Valuation		0.0		27.5
Net Transfers In (Out)		0.0		0.0
Fair value, ending balance		54.5		54.5
Total equity securities | Other risk investments | Common equities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, beginning balance	18.5	11.6	16.9	3.1
Calls/ Maturities/ Paydowns	0.2	1.0	1.8	9.5
Purchases	0.0	0.0	0.0	0.0
Sales	0.0	0.0	0.0	0.0
Net Realized (Gain)/Loss on Sales	0.0	0.0	0.0	0.0
Change in Valuation	0.0	0.0	0.0	0.0
Net Transfers In (Out)	0.0	0.0	0.0	0.0
Fair value, ending balance	$ 18.7	$ 12.6	$ 18.7	$ 12.6

XML

Fair Value - Summary of Quantitative Information about Level 3 Fair Value Measurements (Details) - USD ($) $ in Millions	9 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, Fair Value	$ 52,330.4	$ 52,287.4	$ 51,514.1
Fair Value, Inputs, Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, Fair Value	100.6	177.9	127.7
Fair Value, Inputs, Level 3 | Total Quantitative Level Three Securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, Fair Value	81.9	165.3	110.8
Fair Value, Inputs, Level 3 | Third Party Pricing Exemption Securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, Fair Value	18.7	12.6	16.9
Fair Value, Inputs, Level 3 | Nonredeemable preferred stocks | Total Quantitative Level Three Securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, Fair Value	$ 81.9	$ 110.8	$ 110.8
Fair Value Inputs, Market Cap Price Change Percentage, Range, Minimum	(20.70%)	(8.50%)	(20.20%)
Fair Value Inputs, Market Cap Price Change Percentage, Range, Maximum	(1.10%)	19.80%	(2.30%)
Fair Value Inputs, Market Cap Price Change Percentage, Weighted Average	(6.60%)	6.50%	(7.70%)
Fair Value, Inputs, Level 3 | Common equities | Total Quantitative Level Three Securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, Fair Value		$ 54.5
Fair Value Inputs, Market Cap Price Change Percentage, Range, Minimum		(1.60%)
Fair Value Inputs, Market Cap Price Change Percentage, Range, Maximum		55.80%
Fair Value Inputs, Market Cap Price Change Percentage, Weighted Average		0.90%

XML

Fair Value - Additional Information (Detail) - USD ($)	3 Months Ended					9 Months Ended
	Sep. 30, 2022		Jun. 30, 2022	Sep. 30, 2021		Sep. 30, 2022		Sep. 30, 2021		Dec. 31, 2021
Fair Value Measurements [Line Items]
Investments, Fair Value	$ 52,330,400,000			$ 52,287,400,000		$ 52,330,400,000		$ 52,287,400,000		$ 51,514,100,000
Goodwill impairment	$ 0	[1]	$ 224,800,000	$ 0	[1]	$ 224,800,000	[1]	$ 0	[1]
Fair Value, Inputs, Level 1
Fair Value Measurements [Line Items]
Vendor Quoted Prices, Percent of FV Hierarchy Level	90.00%			82.00%		90.00%		82.00%		79.00%
Investments, Fair Value	$ 29,292,200,000			$ 26,834,100,000		$ 29,292,200,000		$ 26,834,100,000		$ 24,548,200,000
Fair Value, Inputs, Level 2
Fair Value Measurements [Line Items]
Vendor Quoted Prices, Percent of FV Hierarchy Level	98.00%			97.00%		98.00%		97.00%		98.00%
Dealer Quoted Prices, Percent of FV Hierarchy Level	2.00%			3.00%		2.00%		3.00%		2.00%
Investments, Fair Value	$ 22,937,600,000			$ 25,275,400,000		$ 22,937,600,000		$ 25,275,400,000		$ 26,838,200,000
Fair Value, Inputs, Level 3
Fair Value Measurements [Line Items]
Investments, Fair Value	100,600,000			177,900,000		100,600,000		177,900,000		127,700,000
Available-for-sale Securities
Fair Value Measurements [Line Items]
Investments, Fair Value	48,410,700,000			46,134,400,000		48,410,700,000		46,134,400,000		44,815,700,000
Available-for-sale Securities | Total fixed maturities
Fair Value Measurements [Line Items]
Investments, Fair Value	44,173,100,000			45,045,700,000		44,173,100,000		45,045,700,000		43,873,100,000
Available-for-sale Securities | Fair Value, Inputs, Level 1
Fair Value Measurements [Line Items]
Investments, Fair Value	26,634,000,000			22,231,200,000		26,634,000,000		22,231,200,000		19,441,300,000
Available-for-sale Securities | Fair Value, Inputs, Level 1 | Total fixed maturities
Fair Value Measurements [Line Items]
Investments, Fair Value	22,414,400,000			21,152,700,000		22,414,400,000		21,152,700,000		18,498,900,000
Available-for-sale Securities | Fair Value, Inputs, Level 2
Fair Value Measurements [Line Items]
Investments, Fair Value	21,776,700,000			23,903,200,000		21,776,700,000		23,903,200,000		25,374,400,000
Available-for-sale Securities | Fair Value, Inputs, Level 2 | Total fixed maturities
Fair Value Measurements [Line Items]
Investments, Fair Value	21,758,700,000			23,893,000,000		21,758,700,000		23,893,000,000		25,374,200,000
Available-for-sale Securities | Fair Value, Inputs, Level 3
Fair Value Measurements [Line Items]
Investments, Fair Value	0			0		0		0		0
Available-for-sale Securities | Fair Value, Inputs, Level 3 | Total fixed maturities
Fair Value Measurements [Line Items]
Investments, Fair Value	$ 0			$ 0		$ 0		$ 0		$ 0

[1] See Note 12 – Goodwill and Intangible Assets for further discussion.

XML

Debt - Summary of Debt (Detail) - USD ($)		Sep. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Mar. 31, 2020	Oct. 31, 2018	Mar. 31, 2018	Apr. 30, 2017	Aug. 31, 2016	Jan. 31, 2015	Apr. 30, 2014	Nov. 30, 2002	Mar. 31, 1999
Debt Instrument [Line Items]
Fair Value		$ 5,634,700,000		$ 5,857,400,000	$ 5,881,700,000
Debt, Long-term and Short-term, Combined Amount	[1]	6,387,400,000		4,898,800,000	4,898,200,000
2.45% Senior Notes due 2027 (issued: $500.0, August 2016)
Debt Instrument [Line Items]
Long-term Debt		498,100,000		497,700,000	497,600,000
Fair Value		459,700,000		517,900,000	530,600,000
Debt, stated interest rate										2.45%
Debt, face amount										$ 500,000,000.0
2.50% Senior Notes due 2027 (issued: $500.0, March 2022)
Debt Instrument [Line Items]
Long-term Debt		497,400,000		0	0
Fair Value		451,600,000		0	0
Debt, stated interest rate			2.50%
Debt, face amount			$ 500,000,000
6 5/8% Senior Notes due 2029 (issued: $300.0, March 1999)
Debt Instrument [Line Items]
Long-term Debt		297,400,000		297,200,000	297,100,000
Fair Value		322,100,000		388,200,000	390,900,000
Debt, stated interest rate														6.625%
Debt, face amount														$ 300,000,000.0
4.00% Senior Notes due 2029 (issued: $550.0, October 2018)
Debt Instrument [Line Items]
Long-term Debt		546,300,000		545,900,000	545,800,000
Fair Value		519,500,000		621,000,000.0	627,900,000
Debt, stated interest rate							4.00%
Debt, face amount							$ 550,000,000.0
3.20% Senior Notes due 2030 (issued: $500.0, March 2020)
Debt Instrument [Line Items]
Long-term Debt		496,800,000		496,500,000	496,400,000
Fair Value		439,300,000		536,300,000	543,200,000
Debt, stated interest rate						3.20%
Debt, face amount						$ 500,000,000.0
3.00% Senior Notes due 2032 (issued: $500.0, March 2022)
Debt Instrument [Line Items]
Long-term Debt		495,800,000		0	0
Fair Value		418,800,000		0	0
Debt, stated interest rate			3.00%
Debt, face amount			$ 500,000,000
6.25% Senior Notes due 2032 (issued: $400.0, November 2002)
Debt Instrument [Line Items]
Long-term Debt		396,400,000		396,200,000	396,100,000
Fair Value		426,000,000.0		547,900,000	545,500,000
Debt, stated interest rate													6.25%
Debt, face amount													$ 400,000,000.0
4.35% Senior Notes due 2044 (issued: $350.0, April 2014)
Debt Instrument [Line Items]
Long-term Debt		346,900,000		346,800,000	346,800,000
Fair Value		298,500,000		428,400,000	433,600,000
Debt, stated interest rate												4.35%
Debt, face amount												$ 350,000,000.0
3.70% Senior Notes due 2045 (issued: $400.0, January 2015)
Debt Instrument [Line Items]
Long-term Debt		395,700,000		395,600,000	395,600,000
Fair Value		305,700,000		447,100,000	456,200,000
Debt, stated interest rate											3.70%
Debt, face amount											$ 400,000,000.0
4.125% Senior Notes due 2047 (issued: $850.0, April 2017)
Debt Instrument [Line Items]
Long-term Debt		842,000,000.0		841,900,000	841,900,000
Fair Value		710,300,000		1,029,300,000	1,018,500,000
Debt, stated interest rate									4.125%
Debt, face amount									$ 850,000,000.0
4.20% Senior Notes due 2048 (issued: $600.0, March 2018)
Debt Instrument [Line Items]
Long-term Debt		590,300,000		590,200,000	590,200,000
Fair Value		505,900,000		741,300,000	736,300,000
Debt, stated interest rate								4.20%
Debt, face amount								$ 600,000,000.0
3.95% Senior Notes due 2050 (issued: $500.0, March 2020)
Debt Instrument [Line Items]
Long-term Debt		490,900,000		490,800,000	490,700,000
Fair Value		396,600,000		600,000,000.0	599,000,000.0
Debt, stated interest rate						3.95%
Debt, face amount						$ 500,000,000.0
3.70% Senior Notes due 2052 (issued: $500.0, March 2022)
Debt Instrument [Line Items]
Long-term Debt		493,400,000		0	0
Fair Value		$ 380,700,000		$ 0	$ 0
Debt, stated interest rate			3.70%
Debt, face amount			$ 500,000,000.0

[1] Consists of long-term debt. See Note 4 – Debt for further discussion.

XML

Debt - Additional Information (Detail) - USD ($)	1 Months Ended	9 Months Ended		12 Months Ended
	Mar. 31, 2022	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Debt Instrument [Line Items]
Proceeds from Debt, Net of Issuance Costs	$ 1,486,000,000
Long-term Debt, Current Maturities		$ 0	$ 0	$ 0
2.50% Senior Notes due 2027 (issued: $500.0, March 2022)
Debt Instrument [Line Items]
Debt, face amount	$ 500,000,000
Debt, stated interest rate	2.50%
3.00% Senior Notes due 2032 (issued: $500.0, March 2022)
Debt Instrument [Line Items]
Debt, face amount	$ 500,000,000
Debt, stated interest rate	3.00%
3.70% Senior Notes due 2052 (issued: $500.0, March 2022)
Debt Instrument [Line Items]
Debt, face amount	$ 500,000,000.0
Debt, stated interest rate	3.70%
Discretionary Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity		250,000,000
Borrowings outstanding		$ 0	$ 0	$ 0

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Income Taxes Reconciliation of Provision (Benefit) for Income Taxes Reported in Consolidated Statements of Income with Tax at Statutory Rate (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income (loss) before income taxes	$ 142.5	$ 139.0	$ (103.2)	$ 3,006.1
Tax at statutory federal rate	29.9	29.2	(21.7)	631.3
Goodwill impairment	0.0	0.0	47.2	0.0
Stock-based compensation	(9.6)	(7.9)	(17.7)	(19.2)
State income taxes, net of federal taxes	4.5	5.5	9.7	17.7
Tax-preferenced investment income	(2.8)	(3.3)	(9.5)	(10.0)
Tax credits	(5.2)	(3.7)	(9.4)	(6.1)
Nondeductible compensation expense	1.8	1.9	5.4	5.6
Tax deductible dividends	(0.4)	(0.5)	(1.4)	(1.6)
Other items, net	0.2	(0.7)	(0.9)	(0.2)
Provision for income taxes	$ 18.4	$ 20.5	$ 1.7	$ 617.5
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Tax at statutory federal rate	21.00%	21.00%	21.00%	21.00%
Goodwill impairment	0.00%	0.00%	(45.70%)	0.00%
Stock-based compensation	(6.70%)	(5.70%)	17.20%	(0.60%)
State income taxes, net of federal taxes	3.20%	4.00%	(9.40%)	0.60%
Tax-preferenced investment income	(2.00%)	(2.40%)	9.20%	(0.30%)
Tax credits	(3.60%)	(2.70%)	9.10%	(0.20%)
Nondeductible compensation expense	1.30%	1.40%	(5.20%)	0.20%
Tax deductible dividends	(0.30%)	(0.40%)	1.40%	(0.10%)
Other items, net	0.00%	(0.50%)	0.80%	(0.10%)
Provision for income taxes	12.90%	14.70%	(1.60%)	20.50%

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Income Taxes - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Valuation allowance	$ 0	$ 0	$ 0	$ 0	$ 0
Provision for income taxes	12.90%	14.70%	(1.60%)	20.50%

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Loss and Loss Adjustment Expense Reserves (Details) - USD ($) $ in Millions			9 Months Ended
	Jan. 01, 2022	Jan. 01, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
Liability for Claims and Claims Adjustment Expense [Line Items]
Loss and loss adjustment expense reserves			$ 30,631.8	$ 25,926.3	$ 26,164.1	$ 20,265.8
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments and Liability for Unpaid Claims and Claim Adjustment Expense, Other Reconciling Item			6,034.0	4,822.5	4,733.6	3,798.2
Liability for Unpaid Claims and Claims Adjustment Expense, Net	$ 21,430.5	$ 17,200.1	24,597.8	21,103.8	$ 21,430.5	$ 16,467.6
Liability for Unpaid Claims and Claims Adjustment Expense, Business Acquisitions	$ 0.0	$ 732.5
Current Year Claims and Claims Adjustment Expense			28,245.4	24,610.8
Prior Year Claims and Claims Adjustment Expense			(52.8)	(156.8)
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims			28,298.2	24,767.6
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Current Year			15,712.4	13,650.6
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years			9,418.5	7,213.3
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid			25,130.9	20,863.9
Short-Duration Insurance Contract, Accident Year 2021
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior Year Claims and Claims Adjustment Expense			(45.0)
Short-Duration Insurance Contract, Accident Year 2019
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior Year Claims and Claims Adjustment Expense				(109.0)
Short-Duration Insurance Contract, Accident Years 2018 and Prior
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior Year Claims and Claims Adjustment Expense				(113.0)
Short-Duration Insurance Contract, Accident Years 2019 and Prior
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior Year Claims and Claims Adjustment Expense			(29.0)
Short-Duration Insurance Contract, Accident Year 2020
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior Year Claims and Claims Adjustment Expense			21.0
Personal Lines | Personal auto business
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior Year Claims and Claims Adjustment Expense			28.0	(48.0)
Personal Lines | special lines
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior Year Claims and Claims Adjustment Expense				12.0
Commercial Lines
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior Year Claims and Claims Adjustment Expense			(77.0)	(91.0)
Property
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior Year Claims and Claims Adjustment Expense				(31.0)
Agency | Personal Lines | Personal auto business
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior Year Claims and Claims Adjustment Expense				$ (44.0)
Direct | Personal Lines | Personal auto business
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior Year Claims and Claims Adjustment Expense			$ 25.0

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Supplemental Cash Flow Information (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Open reverse repurchase commitments	$ 0	$ 0	$ 0
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	29,700,000	79,500,000
Income Taxes Paid	595,900,000	669,500,000
Interest Paid, Excluding Capitalized Interest, Operating Activities	191,300,000	186,300,000
Operating Lease, Payments	62,500,000	67,800,000
Cash and Cash Equivalents
Open reverse repurchase commitments	123,000,000	134,600,000	$ 137,100,000
Common equities | Quarterly dividend
Dividends Payable	$ 58,500,000	$ 58,500,000

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Segment Information - Operating Results (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting Information [Line Items]
Revenues	$ 12,780.2	$ 11,859.2	$ 36,140.9	$ 35,209.9
Pretax Profit (Loss)	142.5	139.0	(103.2)	3,006.1
Amortization of intangible assets	5.4	14.6	25.5	43.1
Personal Lines | Agency | Underwriting operations
Segment Reporting Information [Line Items]
Revenues	4,441.9	4,267.9	13,131.7	12,586.4
Pretax Profit (Loss)	(41.3)	41.0	507.6	796.0
Personal Lines | Direct | Underwriting operations
Segment Reporting Information [Line Items]
Revenues	5,077.4	4,690.2	14,776.9	13,755.8
Pretax Profit (Loss)	40.6	(62.4)	389.4	480.6
Operating Segments | Underwriting operations
Segment Reporting Information [Line Items]
Revenues	12,398.9	11,364.8	36,349.7	32,767.3
Pretax Profit (Loss)	94.3	(46.9)	1,281.6	1,455.8
Operating Segments | Personal Lines | Underwriting operations
Segment Reporting Information [Line Items]
Revenues	9,519.3	8,958.1	27,908.6	26,342.2
Pretax Profit (Loss)	$ (0.7)	$ (21.4)	$ 897.0	$ 1,276.6
Personal auto insurance percentage of the total personal lines segment net premiums earned	94.00%	94.00%	94.00%	94.00%
Operating Segments | Commercial Lines | Underwriting operations
Segment Reporting Information [Line Items]
Revenues	$ 2,317.9	$ 1,877.4	$ 6,749.5	$ 4,917.0
Pretax Profit (Loss)	238.1	197.5	683.5	556.1
Operating Segments | Property
Segment Reporting Information [Line Items]
Pretax Profit (Loss)			(514.4)
Operating Segments | Property | Underwriting operations
Segment Reporting Information [Line Items]
Revenues	561.0	526.5	1,689.6	1,501.3
Pretax Profit (Loss)	(141.0)	(222.7)	(289.6)	(376.7)
Amortization of intangible assets	5.0	14.2	24.1	42.5
Operating Segments | Property | Property - Goodwill impairment
Segment Reporting Information [Line Items]
Pretax Profit (Loss)	0.0	0.0	(224.8)	0.0
Operating Segments | Other Indemnity | Underwriting operations
Segment Reporting Information [Line Items]
Revenues	0.7	2.8	2.0	6.8
Pretax Profit (Loss)	(2.1)	(0.3)	(9.3)	(0.2)
Segment Reconciling Items | Fees and other revenues
Segment Reporting Information [Line Items]
Revenues	181.4	174.9	531.9	516.8
Segment Reconciling Items | Service businesses
Segment Reporting Information [Line Items]
Revenues	82.7	73.8	230.5	202.1
Pretax Profit (Loss)	(0.1)	1.0	9.0	12.1
Segment Reconciling Items | Investment income
Segment Reporting Information [Line Items]
Revenues	117.2	245.7	(971.2)	1,723.7
Pretax Profit (Loss)	111.4	239.1	(988.6)	1,705.2
Segment Reconciling Items | Interest expense
Segment Reporting Information [Line Items]
Pretax Profit (Loss)	$ (63.1)	$ (54.2)	$ (180.4)	$ (167.0)

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Segment Information - Underwriting Margins and Combined Ratios for our Underwriting Operations (Detail) - Underwriting operations	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Personal Lines | Agency
Segment Reporting Information [Line Items]
Underwriting Margin	(0.90%)	1.00%	3.90%	6.30%
Combined Ratio	100.90%	99.00%	96.10%	93.70%
Personal Lines | Direct
Segment Reporting Information [Line Items]
Underwriting Margin	0.80%	(1.30%)	2.60%	3.50%
Combined Ratio	99.20%	101.30%	97.40%	96.50%
Operating Segments
Segment Reporting Information [Line Items]
Underwriting Margin	0.80%	(0.40%)	3.50%	4.40%
Combined Ratio	99.20%	100.40%	96.50%	95.60%
Operating Segments | Personal Lines
Segment Reporting Information [Line Items]
Underwriting Margin	0.00%	(0.20%)	3.20%	4.90%
Combined Ratio	100.00%	100.20%	96.80%	95.10%
Operating Segments | Commercial Lines
Segment Reporting Information [Line Items]
Underwriting Margin	10.30%	10.50%	10.10%	11.30%
Combined Ratio	89.70%	89.50%	89.90%	88.70%
Operating Segments | Property
Segment Reporting Information [Line Items]
Underwriting Margin	(25.10%)	(42.30%)	(17.10%)	(25.10%)
Combined Ratio	125.10%	142.30%	117.10%	125.10%
Combined ratio amortization points	0.009	0.027	0.014	0.028

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Dividends (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended												3 Months Ended			9 Months Ended
	Sep. 30, 2022	Aug. 31, 2022	Jul. 31, 2022	Apr. 30, 2022	Mar. 31, 2022	Jan. 31, 2022	Oct. 31, 2021	Sep. 30, 2021	Jul. 31, 2021	Apr. 30, 2021	Mar. 31, 2021	Jan. 31, 2021	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Common Stock, Dividends, Per Share, Declared													$ 0.10		$ 0.10	$ 0.30	$ 0.30
Payments of Ordinary Dividends, Common Stock																$ 175.5	$ 2,811.5
Payments of Ordinary Dividends, Preferred Stock and Preference Stock																26.8	26.8
Quarterly dividend
Common Stock, Dividends, Per Share, Declared		$ 0.10
Common Stock, Dividends, Per Share, Cash Paid			$ 0.10	$ 0.10		$ 0.10	$ 0.10		$ 0.10	$ 0.10		$ 0.10
Payments of Ordinary Dividends, Common Stock			$ 58.5	$ 58.5		$ 58.5	$ 58.5		$ 58.5	$ 58.5		$ 58.6
Annual variable dividend
Common Stock, Dividends, Per Share, Cash Paid												$ 4.50		$ 1.50
Payments of Ordinary Dividends, Common Stock												$ 2,635.9		$ 876.5
Series B Preferred Stock
Preferred Stock, Dividends, Per Share, Cash Paid	$ 26.875				$ 26.875			$ 26.875			$ 26.875
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	$ 13.4				$ 13.4			$ 13.4			$ 13.4
Common equities | Quarterly dividend
Dividends Payable	$ 58.5							$ 58.5					$ 58.5		$ 58.5	$ 58.5	$ 58.5

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Other Comprehensive Income (Loss) - Components of Other Comprehensive Income (Loss) Including Reclassification Adjustments by Income Statement (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Accumulated Other Comprehensive Income (Loss), before Tax [Roll Forward]
AOCI before Tax, Attributable to Parent, beginning balance	$ (2,795.5)	$ 619.6	$ 52.3	$ 1,187.4
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax	(1,223.3)	(117.9)	(4,321.7)	(494.6)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax	(0.9)	(0.3)	(1.1)	(0.9)
OCI, before Reclassifications, before Tax, Attributable to Parent	(1,224.2)	(118.2)	(4,322.8)	(495.5)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax	(58.4)	46.4	(309.0)	237.5
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	(0.2)	(0.2)	(0.4)	(0.8)
Total reclassification adjustment for amounts realized in net income, pre tax	(58.6)	46.2	(309.4)	236.7
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	(1,165.6)	(164.4)	(4,013.4)	(732.2)
AOCI before Tax, Attributable to Parent, ending balance	(3,961.1)	455.2	(3,961.1)	455.2
Accumulated Other Comprehensive Income (Loss), Tax [Roll Forward]
AOCI Tax, Attributable to Parent, beginning balance	586.5	(136.4)	(11.6)	(255.7)
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, Tax	256.9	24.8	907.6	103.9
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax, Portion Attributable to Parent	(0.2)	(0.1)	(0.2)	(0.2)
OCI, Debt Securities, Available-for-Sale, Gain (Loss), before Adjustment, Tax	257.1	24.9	907.8	104.1
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	12.3	(9.7)	64.9	(49.9)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax	(0.1)	(0.1)	(0.1)	(0.2)
Total reclassification adjustment for amounts realized in net income, Total tax (provision) benefit	12.4	(9.6)	65.0	(49.7)
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	244.7	34.5	842.8	153.8
AOCI Tax, Attributable to Parent, ending balance	831.2	(101.9)	831.2	(101.9)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
After tax total accumulated other comprehensive income, beginning balance	(2,209.0)	483.2	40.7	931.7
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax	(966.4)	(93.1)	(3,414.1)	(390.7)
Foreign currency translation adjustment	(0.7)	(0.2)	(0.9)	(0.7)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(967.1)	(93.3)	(3,415.0)	(391.4)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	(46.1)	36.7	(244.1)	187.6
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax	(0.1)	(0.1)	(0.3)	(0.6)
Total reclassification adjustment for amounts realized in net income, after tax	(46.2)	36.6	(244.4)	187.0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(920.9)	(129.9)	(3,170.6)	(578.4)
After tax total accumulated other comprehensive income, ending balance	(3,129.9)	353.3	(3,129.9)	353.3
Total net unrealized gains (losses) on securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
After tax total accumulated other comprehensive income, beginning balance	(2,193.5)	498.8	56.2	947.3
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax	(966.4)	(93.1)	(3,414.1)	(390.7)
Foreign currency translation adjustment	0.0	0.0	0.0	0.0
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(966.4)	(93.1)	(3,414.1)	(390.7)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	(46.1)	36.7	(244.1)	187.6
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax	0.0	0.0	0.0	0.0
Total reclassification adjustment for amounts realized in net income, after tax	(46.1)	36.7	(244.1)	187.6
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(920.3)	(129.8)	(3,170.0)	(578.3)
After tax total accumulated other comprehensive income, ending balance	(3,113.8)	369.0	(3,113.8)	369.0
Net unrealized gains (losses) on forecasted transactions
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
After tax total accumulated other comprehensive income, beginning balance	(14.7)	(15.1)	(14.9)	(15.6)
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax	0.0	0.0	0.0	0.0
Foreign currency translation adjustment	0.0	0.0	0.0	0.0
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	0.0	0.0	0.0	0.0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	0.0	0.0	0.0	0.0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax	(0.1)	(0.1)	(0.3)	(0.6)
Total reclassification adjustment for amounts realized in net income, after tax	(0.1)	(0.1)	(0.3)	(0.6)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	0.1	0.1	0.3	0.6
After tax total accumulated other comprehensive income, ending balance	(14.6)	(15.0)	(14.6)	(15.0)
Accumulated Foreign Currency Adjustment Attributable to Parent
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
After tax total accumulated other comprehensive income, beginning balance	(0.8)	(0.5)	(0.6)	0.0
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax	0.0	0.0	0.0	0.0
Foreign currency translation adjustment	(0.7)	(0.2)	(0.9)	(0.7)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(0.7)	(0.2)	(0.9)	(0.7)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	0.0	0.0	0.0	0.0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax	0.0	0.0	0.0	0.0
Total reclassification adjustment for amounts realized in net income, after tax	0.0	0.0	0.0	0.0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(0.7)	(0.2)	(0.9)	(0.7)
After tax total accumulated other comprehensive income, ending balance	$ (1.5)	$ (0.7)	$ (1.5)	$ (0.7)

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Other Comprehensive Income (Loss) - Components of Other Comprehensive Income (Loss) Including Reclassification Adjustments by Income Statement, Additional Information (Detail) $ in Millions	Sep. 30, 2022 USD ($)
Statement of Comprehensive Income [Abstract]
Net unrealized losses on forecasted transactions, expected to reclassify into income within the next 12 months	$ 0.5

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Goodwill and Intangible Assets - Net Carrying Amount of Other Intangible Assets (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Schedule of Other Intangible Assets [Line Items]
Indefinite lived intangible assets	$ 12.4	$ 12.4	$ 12.4
Total	91.8	117.3	131.9
Accumulated amortization	153.1	383.8	369.2
Licensing Agreements
Schedule of Other Intangible Assets [Line Items]
Accumulated amortization	0.6	0.6	0.6
Finite-Lived Intangible Assets
Schedule of Other Intangible Assets [Line Items]
Intangible assets subject to amortization	79.4	104.9	119.5
Accumulated amortization	$ 152.5	$ 383.2	$ 368.6

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Goodwill and Intangible Assets - Finite-lived Intangible Assets (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization	$ 153.1	$ 383.8	$ 369.2
Policies in force
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	0.0	256.2	256.2
Accumulated Amortization	0.0	247.1	237.9
Net Carrying Amount	0.0	9.1	18.3
Agency relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	159.2	159.2	159.2
Accumulated Amortization	85.3	76.8	73.9
Net Carrying Amount	73.9	82.4	85.3
Software rights
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	69.1	69.1	69.1
Accumulated Amortization	64.8	58.3	56.2
Net Carrying Amount	4.3	10.8	12.9
Trade name
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3.6	3.6	3.6
Accumulated Amortization	2.4	1.0	0.6
Net Carrying Amount	1.2	2.6	3.0
Finite-Lived Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	231.9	488.1	488.1
Accumulated Amortization	152.5	383.2	368.6
Net Carrying Amount	$ 79.4	$ 104.9	$ 119.5

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Goodwill and Intangible Assets - Goodwill (Details) - USD ($)	3 Months Ended					9 Months Ended
	Sep. 30, 2022		Jun. 30, 2022	Sep. 30, 2021		Sep. 30, 2022		Sep. 30, 2021		Mar. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment	$ 0	[1]	$ 224,800,000	$ 0	[1]	$ 224,800,000	[1]	$ 0	[1]
Goodwill, Impaired, Accumulated Impairment Loss	224,800,000					224,800,000				$ 0
Goodwill	227,900,000			452,700,000		227,900,000		452,700,000			$ 452,700,000
Amortization of intangible assets	$ 5,400,000			14,600,000		$ 25,500,000		43,100,000
Property
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment			$ 224,800,000
Personal Lines | Agency
Finite-Lived Intangible Assets [Line Items]
Goodwill Attributable to Reporting Unit, Percent	98.00%					98.00%
Policies in force
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 0			$ 256,200,000		$ 0		$ 256,200,000			$ 256,200,000
Policies in force | Fully Amortized
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount										$ 256,200,000

[1] See Note 12 – Goodwill and Intangible Assets for further discussion.