Assurant (AIZ) 10-Q 4 Nov 21 2021 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Sep. 30, 2021	Oct. 29, 2021
Entity Listings [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2021
Document Transition Report	false
Entity Registrant Name	Assurant, Inc.
Entity Incorporation, State or Country Code	DE
Entity File Number	001-31978
Entity Tax Identification Number	39-1126612
Entity Address, Address Line One	55 Broadway
Entity Address, Address Line Two	Suite 2901
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10006
City Area Code	212
Local Phone Number	859-7000
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		56,976,709
Entity Central Index Key	0001267238
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Amendment Flag	false
Common Stock
Entity Listings [Line Items]
Title of 12(b) Security	Common Stock, $0.01 Par Value
Trading Symbol	AIZ
Security Exchange Name	NYSE
5.25% Subordinated Notes due 2061
Entity Listings [Line Items]
Title of 12(b) Security	5.25% Subordinated Notes due 2061
Trading Symbol	AIZN
Security Exchange Name	NYSE

Consolidated Balance Sheets (un

Consolidated Balance Sheets (unaudited) - USD ($) $ in Millions		Sep. 30, 2021	Dec. 31, 2020
Investments:
Fixed maturity securities available for sale, at fair value (net of allowances for credit losses of $0.0 and $1.2 at September 30, 2021 and December 31, 2020, respectively; amortized cost - $7,271.3 and $6,245.8 at September 30, 2021 and December 31, 2020, respectively)		$ 7,650.3	$ 6,815.5
Equity securities at fair value		422.3	290.2
Commercial mortgage loans on real estate, at amortized cost (net of allowances for credit losses of $0.9 and $1.6 at September 30, 2021 and December 31, 2020, respectively)		227.3	138.3
Short-term investments		217.5	292
Other investments (net of allowances for credit losses of $0.0 at September 30, 2021 and $1.4 at December 31, 2020, respectively)		679.2	686.8
Total investments		9,196.6	8,222.8
Cash and cash equivalents		2,027.9	2,207.6
Premiums and accounts receivable (net of allowances for credit losses of $10.6 and $13.3 at September 30, 2021 and December 31, 2020, respectively)		1,702.4	1,548.9
Reinsurance recoverables (net of allowances for credit losses of $22.8 and $24.6 at September 30, 2021 and December 31, 2020, respectively)		7,135.4	6,605.4
Accrued investment income		63.6	67
Deferred acquisition costs		8,548.2	7,388
Property and equipment, net		529	446.1
Goodwill		2,579.9	2,589.3
Value of business acquired		698.6	1,152.2
Other intangible assets, net		638.4	696.2
Other assets (net of allowances for credit losses of $4.1 and $1.8 at September 30, 2021 and December 31, 2020, respectively)		493.3	496.2
Assets held in separate accounts		11.5	11.5
Assets held for sale (Note 4)		0	13,218.7
Total assets		33,624.8	44,649.9
Liabilities
Future policy benefits and expenses		1,334.1	1,358.5
Unearned premiums		18,457.2	17,293.1
Claims and benefits payable		1,897.4	1,610.3
Commissions payable		664.6	699.1
Reinsurance balances payable		389.3	359.3
Funds held under reinsurance		350	358.6
Accounts payable and other liabilities		2,574.4	2,640.5
Debt		2,201.9	2,252.9
Liabilities related to separate accounts		11.5	11.5
Liabilities held for sale (Note 4)		0	12,111.3
Total liabilities		27,880.4	38,695.1
Commitments and contingencies (Note 16)
Stockholders’ equity
6.50% Series D mandatory convertible preferred stock, par value $1.00 per share, 0 shares and 2,875,000 shares authorized, issued and outstanding at June 30, 2021 and December 31, 2020, respectively	[1]	0	2.9
Common stock, par value $0.01 per share, 800,000,000 shares authorized, 59,850,255 and 62,967,808 shares issued and 57,554,166 and 57,967,808 shares outstanding at September 30, 2021 and December 31, 2020, respectively		0.7	0.6
Additional paid-in capital		1,731.3	1,956.8
Retained earnings		4,219.3	3,548.7
Accumulated other comprehensive (loss) income		(84.1)	709.8
Treasury stock, at cost; 2,296,089 and 5,000,000 shares at September 30, 2021 and December 31, 2020, respectively		(122.8)	(267.4)
Total Assurant, Inc. stockholders’ equity		5,744.4	5,951.4
Non-controlling interests		0	3.4
Total equity		5,744.4	5,954.8
Total liabilities and equity		$ 33,624.8	$ 44,649.9
[1]	Each outstanding share of mandatory convertible preferred stock converted to common stock in March 2021. Refer to Note 13 for further information.

Consolidated Balance Sheets (_2

Consolidated Balance Sheets (unaudited) (Parenthetical) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Fixed maturity securities available for sale, amortized cost	$ 7,271.3
Commercial mortgage loans on real estate, allowances for expected credit losses	0.9	$ 1.6
Other investments, allowances for credit losses	0	1.4
Premiums and accounts receivable, allowances for expected credit losses	10.6	13.3
Reinsurance recoverables, allowances for expected credit losses	22.8	24.6
Other assets, allowances for credit losses	$ 4.1	$ 1.8
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	800,000,000	800,000,000
Common stock, shares, issued (in shares)	59,850,255	62,967,808
Common stock, shares outstanding (in shares)	57,554,166	57,967,808
Treasury stock, at cost (in shares)	2,296,089	5,000,000
Fixed maturity securities
Fixed maturity securities available for sale, allowances for credit losses	$ 0	$ 1.2
Fixed maturity securities available for sale, amortized cost	$ 7,271.3	$ 6,245.8
Series D Preferred Stock
Share interest rate	6.50%	6.50%
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, shares authorized (in shares)	0	2,875,000
Preferred stock, shares issued (in shares)	0	2,875,000
Preferred stock, shares outstanding (in shares)	0	2,875,000

Consolidated Statements of Oper

Consolidated Statements of Operations (unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues
Net earned premiums	$ 2,140.1	$ 2,086.8	$ 6,396.3	$ 6,173.6
Fees and other income	309.6	209.4	858	829.4
Net investment income	76	63.3	235.2	212.3
Net realized gains (losses) on investments (including $—, $(1.3), $0.2 and $(14.0) of impairment-related gains (losses) for the three and nine months ended September 30, 2021 and 2020, respectively)	112.1	17.2	123.2	(37.9)
Total revenues	2,637.8	2,376.7	7,612.7	7,177.4
Benefits, losses and expenses
Policyholder benefits	614.2	638.5	1,681.2	1,697.3
Amortization of deferred acquisition costs and value of business acquired	965.6	927.3	2,903.7	2,689.6
Underwriting, general and administrative expenses	818.3	672.9	2,301.2	2,290.9
Interest expense	27.5	25.5	84.7	77.7
Loss on extinguishment of debt (Note 10)	20.7	0	20.7	0
Total benefits, losses and expenses	2,446.3	2,264.2	6,991.5	6,755.5
Income from continuing operations before income tax expense	191.5	112.5	621.2	421.9
Income tax expense	37.9	24.5	134.4	20.6
Net income from continuing operations	153.6	88	486.8	401.3
Net income (loss) from discontinued operations (Note 4)	728.8	(118.5)	762	(97.6)
Net income (loss)	882.4	(30.5)	1,248.8	303.7
Less: Net loss (income) attributable to non-controlling interests	0	0.3	0	(1.1)
Net income (loss) attributable to stockholders	882.4	(30.2)	1,248.8	302.6
Less: Preferred stock dividends	0	(4.7)	(4.7)	(14)
Net income (loss) attributable to common stockholders, basic	882.4	(34.9)	1,244.1	288.6
Net income (loss) attributable to common stockholders, diluted	$ 882.4	$ (34.9)	$ 1,244.1	$ 288.6
Basic
Net income from continuing operations (in dollars per share)	$ 2.60	$ 1.39	$ 8.07	$ 6.39
Net income (loss) from discontinued operations (in dollars per share)	12.32	(1.97)	12.74	(1.61)
Net income (loss) attributable to common stockholders (in dollars per share)	14.92	(0.58)	20.81	4.78
Diluted
Net income from continuing operations (in dollars per share)	2.58	1.38	8	6.32
Net income (loss) from discontinued operations (in dollars per share)	12.25	(1.96)	12.52	(1.54)
Net income (loss) attributable to common stockholders (in dollars per share)	$ 14.83	$ (0.58)	$ 20.52	$ 4.78
Share Data
Weighted average common shares outstanding used in basic per common share calculations (in shares)	59,126,313	60,190,103	59,769,690	60,384,817
Plus: Dilutive securities (in shares)	353,151	235,619	1,085,631	2,956,041
Weighted average common shares outstanding used in diluted per common share calculations (in shares)	59,479,464	60,425,722	60,855,321	63,340,858

Consolidated Statements of Op_2

Consolidated Statements of Operations (unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Impairment gain (losses)	$ 0	$ (1.3)	$ 0.2	$ (14)

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (unaudited) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)		$ 882.4	$ (30.5)	$ 1,248.8	$ 303.7
Other comprehensive income (loss):
Change in unrealized gains (losses) on investments, net of taxes of $184.4, $(13.0), $220.8 and $(54.1) for the three and nine months ended September 30, 2021 and 2020, respectively (1)	[1]	(663.1)	56.8	(786.2)	188.2
Change in unrealized gains on derivative transactions, net of taxes of $0.2, $0.2, $0.6 and $0.5 for each of the three and nine months ended September 30, 2021 and 2020, respectively		(0.6)	(0.6)	(1.8)	(1.8)
Change in foreign currency translation, net of taxes of $1.1, $(1.5), $1.3 and $4.2 for the three and nine months ended September 30, 2021 and 2020, respectively (1)	[1]	(23.7)	35.3	(2.9)	15.2
Change in pension and postretirement unrecognized net periodic benefit cost, net of taxes of $0.2, $0.5, $0.6 and $(12.6) for the three and six months ended June 30, 2021 and 2020, respectively	[2]	(0.7)	(2.2)	(3)	45.1
Total other comprehensive income (loss)		(688.1)	89.3	(793.9)	246.7
Total comprehensive income		194.3	58.8	454.9	550.4
Less: Comprehensive income (loss) attributable to non-controlling interests		0	0.3	0	(1.1)
Total comprehensive income attributable to stockholders		$ 194.3	$ 59.1	$ 454.9	$ 549.3
[1]	Three and nine months ended September 30, 2021 include $0.3 million of foreign currency translation adjustments and $605.7 million of net unrealized gains on investments, for a total of $606.0 million, that were recognized through income from discontinued operations upon the sale of the disposed Global Preneed business. Refer to Note 4 for further information.
[2]	Change in nine months ended September 30, 2020 includes the prior service credit resulting from the February 2020 amendment of the Retirement Health Benefits plan. Refer to Note 15 for further information.

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Change in unrealized gains on securities, tax	$ 184.4	$ (13)	$ 220.8	$ (54.1)
Change in unrealized gains on derivative transactions, tax	0.2	0.2	0.6	0.5
Change in foreign currency transaction, tax	1.1	(1.5)	1.3	4.2
Change in pension and postretirement unrecognized net periodic benefit cost, tax	0.2	$ 0.6	0.9	$ (12)
Discontinued Operations, Held-for-sale | Global Preneed
Gain on disposition of business, recognized from AOCI, net of tax	606		606
Foreign currency translation adjustment | Discontinued Operations, Held-for-sale | Global Preneed
Gain on disposition of business, recognized from AOCI, net of tax	0.3		0.3
Net unrealized gains on securities | Discontinued Operations, Held-for-sale | Global Preneed
Gain on disposition of business, recognized from AOCI, net of tax	$ 605.7		$ 605.7

Consolidated Statements of Chan

Consolidated Statements of Changes in Equity (unaudited) - USD ($) $ in Millions	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Non-controlling Interests	Cumulative Effect, Period of Adoption, Adjustment	[1]	Cumulative Effect, Period of Adoption, AdjustmentRetained Earnings	[1]
Beginning balance at Dec. 31, 2019	$ 5,682.1	$ 2.9	$ 1.6	$ 4,537.7	$ 5,966.4	$ 411.5	$ (5,267.3)	$ 29.3	$ (20.4)		$ (20.4)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]	Accounting Standards Update 2016-13 [Member]
Stock plan issuances	$ 8.6			8.6
Stock plan compensation expense	41.9			41.9
Common stock dividends	(115.1)				(115.1)
Acquisition of common stock	(172.5)			(19.3)			(153.2)
Net income	303.7				302.6			1.1
Preferred stock dividends	(14)				(14)
Change in equity of non-controlling interests	(18.7)				6.5			(25.2)
Acquisition of non-controlling interests	(2.3)			(0.7)				(1.6)
Other comprehensive income (loss)	246.7					246.7
Ending balance at Sep. 30, 2020	5,940	2.9	1.6	4,568.2	6,126	658.2	(5,420.5)	3.6
Beginning balance at Jun. 30, 2020	5,984.5	2.9	1.6	4,550.4	6,194.4	568.9	(5,350.4)	16.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock plan issuances	4.7			4.7
Stock plan compensation expense	15.5			15.5
Common stock dividends	(37.5)				(37.5)
Acquisition of common stock	(71.8)			(1.7)			(70.1)
Net income	(30.5)				(30.2)			(0.3)
Preferred stock dividends	(4.7)				(4.7)
Change in equity of non-controlling interests	(7.2)				4			(11.2)
Acquisition of non-controlling interests	(2.3)			(0.7)				(1.6)
Other comprehensive income (loss)	89.3					89.3
Ending balance at Sep. 30, 2020	5,940	2.9	1.6	4,568.2	6,126	658.2	(5,420.5)	3.6
Beginning balance at Dec. 31, 2020	5,954.8	2.9	0.6	1,956.8	3,548.7	709.8	(267.4)	3.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock plan issuances	11.8			11.8
Stock plan compensation expense	48.6			48.6
Common stock dividends	(118.5)				(118.5)
Acquisition of common stock	(581.6)			(127.2)	(454.4)
Net income	1,248.8				1,248.8
Preferred stock conversion		(2.9)	0.1	(141.8)			144.6
Preferred stock dividends	(4.7)				(4.7)
Change in equity of non-controlling interests	(4)				(0.6)			(3.4)
Acquisition of non-controlling interests	(16.9)			(16.9)
Other comprehensive income (loss)	(793.9)					(793.9)
Ending balance at Sep. 30, 2021	5,744.4	0	0.7	1,731.3	4,219.3	(84.1)	(122.8)	0
Beginning balance at Jun. 30, 2021	5,908.4	0	0.7	1,786.2	3,640.3	604	(122.8)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock plan issuances	6.4			6.4
Stock plan compensation expense	18.2			18.2
Common stock dividends	(38.5)				(38.5)
Acquisition of common stock	(327.5)			(62.6)	(264.9)
Net income	882.4				882.4
Acquisition of non-controlling interests	(16.9)			(16.9)
Other comprehensive income (loss)	(688.1)					(688.1)
Ending balance at Sep. 30, 2021	$ 5,744.4	$ 0	$ 0.7	$ 1,731.3	$ 4,219.3	$ (84.1)	$ (122.8)	$ 0
[1]	Amount relates to the adoption of the accounting standard for accounting for expected credit losses for assets held at amortized cost, which established allowances for such expected credit losses as of January 1, 2020.

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Equity (unaudited) (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Stockholders' Equity [Abstract]
Common stock dividends (usd per share)	$ 0.66	$ 0.63	$ 1.98	$ 1.89
Preferred stock dividends (usd per share)		$ 1.63	$ 1.63	$ 4.88

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020
Statement of Cash Flows [Abstract]
Net income attributable to stockholders		$ 1,248.8	$ 302.6
Noncash revenues, expenses, gains and losses included in net income from operations:
Income from discontinued operations (1)	[1]	(762)	97.6
Deferred tax expense		122.3	179.5
Depreciation and amortization		126	104.2
Net realized (gains) losses on investments, including impairment losses		(123.2)	37.9
Stock based compensation expense		48.6	41.9
Loss on extinguishment of debt		20.7	0
Ike related charges, net of derivative gains	[2]	0	1.7
Changes in operating assets and liabilities:
Change in insurance policy reserves and expenses		1,427.8	608.2
Change in premiums and accounts receivable		(131.6)	107.3
Change in commissions payable		(77.4)	14
Change in reinsurance recoverable		(517.7)	(151.7)
Change in reinsurance balance payable		31.2	79.5
Change in funds withheld under reinsurance		(8.6)	42.6
Change in deferred acquisition costs and value of business acquired		(712.1)	(343.8)
Change in taxes payable (receivable) (3)	[3]	(122.7)	(25.7)
Change in other assets and other liabilities		(177.2)	(381.4)
Other		(17.1)	(6.5)
Net cash provided by operating activities - discontinued operations		151.2	193.7
Net cash provided by operating activities		527	901.6
Sales of:
Fixed maturity securities available for sale		668.9	390
Equity securities		10.6	17.5
Other invested assets	[4]	124.4	87.4
Subsidiary, net of cash transferred	[1]	1,319.6	0
Ike foreign currency hedge	[2]	0	22
Maturities, calls, prepayments, and scheduled redemption of:
Fixed maturity securities available for sale		730.4	561.5
Commercial mortgage loans on real estate		11	12.6
Purchases of:
Fixed maturity securities available for sale		(2,316.9)	(1,115.3)
Equity securities		(34.9)	(23.6)
Commercial mortgage loans on real estate		(95.7)	0
Other invested assets	[4]	(58.9)	(75.7)
Property and equipment and other		(131.3)	(81.1)
Subsidiaries, net of cash transferred	[5]	(16.6)	(166.1)
Net cash outflow related to sale of interests in Iké and termination of put/call obligations		0	(73.3)
Consolidated investment entities
Purchases of investments	[6]	0	(353.1)
Sale of investments	[6]	0	550.2
Change in short-term investments		(30.2)	160.4
Other		1.5	0.2
Net cash used in investing activities - discontinued operations		(145.2)	(188.8)
Net cash provided by (used in) investing activities		36.7	(275.2)
Financing activities
Issuance of debt, net of issuance costs		347.2	0
Repayments of Debt		(419.8)	0
Repayment of debt for consolidated investment entities	[6]	0	(1.2)
Borrowings under unsecured revolving credit facility		0	200
Payments on secured revolving credit facility		0	(200)
Acquisition of common stock		(544.3)	(154.5)
Common stock dividends paid		(118.5)	(115.1)
Preferred stock dividends paid		(4.7)	(14)
Employee stock purchases and withholdings		(17.3)	(12)
Net cash provided by (used in) financing activities - discontinued operations		0	0
Net cash used in financing activities		(757.4)	(296.8)
Effect of exchange rate changes on cash and cash equivalents - continuing operations		(7.2)	6.5
Effect of exchange rate changes on cash and cash equivalents - discontinued operations		0.2	(0.2)
Effect of exchange rate changes on cash and cash equivalents		(7)	6.3
Change in cash and cash equivalents		(200.7)	335.9
Cash and cash equivalents at beginning of period		2,228.6	1,867.1
Cash and cash equivalents at end of period		2,027.9	2,203
Less: Cash and cash equivalents of discontinued operations at end of period		0	13.7
Cash and cash equivalents of continuing operations at end of period		$ 2,027.9	$ 2,189.3
[1]	Relates to the disposition of the Global Preneed business, net of $27.3 million of cash transferred. For additional information, refer to Note 4.
[2]	Relates to the disposition of Iké Grupo, Iké Asistencia and certain of their affiliates (collectively, “Iké”).
[3]	The nine months ended September 30, 2020 includes receipt of the $204.9 million federal tax refund, which includes interest, related to the ability to carryback net operating losses to prior periods under the Coronavirus Aid, Relief, and Economic Security Act (“CARES Act”).
[4]	In connection with the sale of the Company’s minority interests in Iké in May 2020, the Company provided financing to Iké Grupo in an aggregate principal amount of $34.0 million (the “Iké Loan”), which was reflected in purchases of other invested assets in the nine months ended September 30, 2020. In April 2021, the Iké Loan was prepaid in full, which was reflected in sales of other invested assets in the nine months ended September 30, 2021.
[5]	The nine months ended September 30, 2020 consists of $175.4 million in cash consideration for the acquisition of American Financial & Automotive Services, Inc., net of $39.6 million of cash acquired, and $30.3 million in total cash consideration for three business acquisitions within the Global Lifestyle business.
[6]	Relates to cash flows from the Company’s variable interest entities.

Consolidated Statements of Ca_2

Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Business Acquisition [Line Items]
Proceeds from federal tax refunds, CAREs Act		$ 204.9
Disposal group, not discontinued operations | Ike Loan
Business Acquisition [Line Items]
Loans to Iké Grupo		34
Discontinued Operations, Held-for-sale | Global Preneed
Business Acquisition [Line Items]
Business disposition, cash transferred	$ 27.3
AFAS
Business Acquisition [Line Items]
Cash consideration for acquisition		175.4
Cash acquired from acquisition		39.6
Strategic Acquisition In Global Lifestyle Business
Business Acquisition [Line Items]
Cash consideration for acquisition		$ 30.3

Nature of Operations

Nature of Operations	9 Months Ended
	Sep. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations	Nature of Operations Assurant, Inc. (the “Company”) is a global provider of lifestyle and housing solutions that support, protect and connect major consumer purchases. The Company partners with leading brands to develop innovative products and services and to deliver enhanced customer experience. The Company operates in North America, Latin America, Europe and Asia Pacific through two operating segments: Global Lifestyle and Global Housing. Through its Global Lifestyle segment, the Company provides mobile device solutions and extended service products and related services for consumer electronics and appliances (referred to as “Connected Living”); vehicle protection and related services (referred to as “Global Automotive”); and credit and other insurance products (referred to as “Global Financial Services and Other”). Through its Global Housing segment, the Company provides lender-placed homeowners insurance, lender-placed manufactured housing insurance and lender-placed flood insurance (referred to as “Lender-placed Insurance”); renters insurance and related products (referred to as “Multifamily Housing”); and voluntary manufactured housing insurance, voluntary homeowners insurance and other specialty products (referred to as “Specialty and Other”). The businesses previously reported as the Global Preneed segment, through which the Company provided pre-funded funeral insurance, final need insurance and related services, as well as certain businesses previously disposed of through reinsurance, were sold in August 2021. Refer to Note 4 for additional information on the sale.The Company’s common stock is traded on the New York Stock Exchange under the symbol “AIZ”.

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited interim Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information. Accordingly, these statements do not include all of the information and notes required by GAAP for complete financial statements. The interim financial data as of September 30, 2021 and for the three and nine months ended September 30, 2021 and 2020 is unaudited. In the opinion of management, the interim data includes all adjustments necessary for a fair statement of the results for the interim periods. The unaudited interim Consolidated Financial Statements include the accounts of the Company and all of its wholly owned subsidiaries. All inter-company transactions and balances are eliminated in consolidation. Certain prior period amounts have been reclassified to conform to the current year presentation, including the impacts of businesses held for sale and discontinued operations as further summarized in Note 4.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	9 Months Ended
	Sep. 30, 2021
Accounting Standards Update and Change in Accounting Principle [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements Adopted Simplifying the Accounting for Income Taxes : In December 2019, the Financial Accounting Standards Board (“FASB”) issued new guidance to simplify the accounting for income taxes by removing certain exceptions to the general principles and also simplify areas such as franchise taxes, step-up in tax basis goodwill, separate entity financial statements and interim recognition of enactment of tax laws or rate changes. The standard was adopted by the Company beginning on January 1, 2021 with no material impact on its financial position or results of operations. Not Yet Adopted Targeted improvements to the accounting for long-duration contracts : In August 2018, the FASB issued guidance that provides targeted improvements to the accounting for long-duration contracts. The guidance includes the following primary changes: assumptions supporting benefit reserves will no longer be locked-in but must be updated at least annually with the impact of changes to the liability reflected in earnings (except for discount rates); the discount rate assumptions will be based on the upper-medium grade (low credit risk) fixed-income instrument yield instead of the earnings rate of invested assets; the discount rate must be evaluated at each reporting date and the impact of changes to the liability estimate as a result of updating the discount rate assumption is required to be recognized in other comprehensive income; the provision for adverse deviation is eliminated; and premium deficiency testing is eliminated. Other noteworthy changes include the following: differing models for amortizing deferred acquisition costs will become uniform for all long-duration contracts based on a constant rate over the expected term of the related in-force contracts; all market risk benefits associated with deposit contracts must be reported at fair value with changes reflected in income except for changes related to credit risk which will be recognized in other comprehensive income; and disclosures will be expanded to include disaggregated roll forwards of the liability for future policy benefits, policyholder account balances, market risk benefits, separate account liabilities, and deferred acquisition costs, as well as information about significant inputs, judgments, assumptions and methods used in measurement. The guidance is effective for fiscal years beginning after December 15, 2022, and interim periods within those fiscal years. Early adoption is permitted. Generally, the amendments are applied retrospectively as of the beginning of the earliest period presented with two transition options available for changing the assumptions. The Company is evaluating the requirements of this guidance and the potential impact on the Company’s financial position and results of operations. Facilitation of the Effects of Reference Rate Reform on Financial Reporting: In March 2020, the FASB issued guidance which provides optional expedients and exceptions for applying GAAP to contract modifications and hedging relationships, subject to meeting certain criteria, that reference LIBOR or another reference rate expected to be discontinued. The relief is applicable only to legacy contracts if the amendments made to the agreements are solely for reference rate reform activities. The provisions must be applied consistently for all relevant transactions other than derivatives, which may be applied at a hedging relationship level. The guidance is effective upon issuance. The guidance on contract modifications is applied prospectively from any date beginning March 12, 2020. Unlike other topics, the provisions of this update are only available until December 31, 2022, when the reference rate replacement activity is expected to have been completed. The adoption of this standard is expected to have no material impact on the Company’s financial position and results of operations. Improvements to Convertible Instruments and Contracts in an Entity’s Own Equity : In August 2020, the FASB issued guidance that simplifies accounting for convertible instruments by removing major separation models required under current GAAP. Consequently, more convertible debt instruments will be reported as a single liability instrument and more convertible preferred stock as a single equity instrument with no separate accounting for embedded conversion features. The guidance removes certain settlement conditions that are required for equity contracts to qualify for the derivative scope exception, which will permit more contracts in an entity’s own equity to qualify for it. The guidance also simplifies the diluted earnings per common share (“EPS”) calculation in the areas of convertible instruments and instruments that qualify for the derivatives scope exception for contracts in an entity’s own equity to address accounting for the guidance changes to the classification, recognition and measurement. The guidance is effective for fiscal years beginning after December 15, 2021, and interim periods within those fiscal years. Early adoption is permitted, but no earlier than fiscal years beginning after December 15, 2020, including interim periods within those fiscal years. The adoption of this standard is expected to have no material impact on the Company’s financial position and results of operations. Recognition and Measurement of Revenue Contracts with Customers Acquired in a Business Combination : In October 2021, the FASB issued guidance to improve comparability after a business combination is reported in the acquirer’s financial statements by providing consistent recognition and measurement guidance for revenue contracts with customers acquired in a business combination and revenue contracts with customers not acquired in a business combination. Generally, the acquirer will recognize the acquired contract assets and contract liabilities at the same amounts recorded by the acquiree. Historically, such amounts were recognized by the acquirer at fair value in the acquisition accounting. Under the amended guidance, the acquirer should account for the related revenue contracts as if it had originated the contracts. The amendments provide certain practical expedients for acquirers when recognizing and measuring acquired contract assets and contract liabilities from revenue contracts in a business combination. The guidance is effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. The amendments should be applied prospectively to business combinations occurring on or after the effective date of the amendments. Early adoption of the amendment is permitted, including adoption in an interim period. An entity that early adopts in an interim period should apply the amendments (1) retrospectively to all business combinations for which the acquisition date occurs on or after the beginning of the fiscal year that includes the interim period of early application and (2) prospectively

Business Held for Sale and Disc

Business Held for Sale and Discontinued Operations	9 Months Ended
	Sep. 30, 2021
Discontinued Operations and Disposal Groups [Abstract]
Business Held for Sale and Discontinued Operations	Business Held for Sale and Discontinued Operations On August 2, 2021, the Company completed its sale of the legal entities which comprise the businesses previously reported as the Global Preneed segment and certain businesses previously disposed of through reinsurance, which were previously reported in the Corporate and Other segment (collectively, the “disposed Global Preneed business”), to subsidiaries of CUNA Mutual Group (“CUNA”) for an aggregate purchase price at closing of $1.35 billion in cash. The aggregate purchase price was comprised of a base purchase price of $1.25 billion, adjusted for (i) the amount of Leakage (as defined in the Equity Purchase Agreement, dated as of March 8, 2021, by and among the Company, Interfinancial Inc., CMFG Life Insurance Company and TruStage Global Holdings, ULC (the “Equity Purchase Agreement”)) paid by the disposed Global Preneed business after December 31, 2020 and at or prior to the closing of the transaction, (ii) the amount of any Transaction Related Expenses (as defined in the Equity Purchase Agreement) paid by the disposed Global Preneed business after the closing of the transaction (iii) the difference between the book value of certain assets in the disposed Global Preneed business’s investment portfolio as of December 31, 2020 and the value of cash paid in substitution for the fair market value of such assets by the Company and (iv) the accrual of interest on the base purchase price, as adjusted pursuant to clauses (i) to (iii), at a rate of 6% per annum during the period beginning on January 1, 2021 and ending on the date immediately prior to the date of the closing of the transaction. The purchase price is subject to a post-closing true-up mechanism as set forth in the Equity Purchase Agreement, which is expected to be determined within approximately 120 days from the date of the closing of the transaction. The net proceeds, which is comprised of the aggregate purchase price less $37.7 million of costs to sell, were $1.31 billion. The net after-tax gain on the sale for the nine months ended September 30, 2021 was $723.2 million, including $606.0 million of net after-tax gains recognized from accumulated other comprehensive income. The Company reports a business as held for sale when management has received approval to sell the business and is committed to a formal plan, the business is available for immediate sale, the business is being actively marketed, the sale is anticipated to occur during the ensuing year and certain other specified criteria are met. A business classified as held for sale is recorded at the lower of its carrying amount or estimated fair value less costs to sell, which is required to be remeasured each reporting period. If the carrying amount of the business exceeds its estimated fair value, which is based on the estimated sales price of the transaction, less costs to sell, a loss is recognized. Depreciation is not recorded on assets of a business classified as held for sale. The Company reports the results of operations of a business as discontinued operations if (i) the business is classified as held for sale; (ii) the business represents a strategic shift that will have a major impact on the Company’s operations and financial results; (iii) the operations and cash flows of the business have been or will be eliminated from the ongoing operations of the Company as a result of the disposal transaction; and (iv) the Company will not have any significant continuing involvement in the operations of the business after the disposal transaction. The results of discontinued operations are reported in net income from discontinued operations in the consolidated statements of operations for all periods presented, commencing in the period in which the business is either disposed of or is classified as held for sale, including any gain or loss recognized on closing or adjustment of the carrying amount to fair value less costs to sell. Assets and liabilities related to a business classified as held for sale which also meets the criteria for discontinued operations are segregated in the consolidated balance sheets for the current and prior periods presented. Prior to the sale, the Company determined that the disposed Global Preneed business met the criteria to be classified as held for sale and that the sale represented a strategic shift that will have a major impact on the Company’s operations and financial results. Accordingly, the results of operations of the disposed Global Preneed business are presented as net income from discontinued operations in the consolidated statements of operations and segregated in the consolidated statement of cash flows for all periods presented, and the assets and liabilities for the disposed Global Preneed business have been classified as held for sale and segregated for all periods presented in the consolidated balance sheets. The following table presents the major classes of assets and liabilities as of August 2, 2021, the date of the sale, and the major classes of asset and liabilities held for sale included in the consolidated balance sheet as of December 31, 2020. August 2, 2021 December 31, 2020 Assets Investments: Fixed maturity securities available for sale, at fair value $ 6,761.0 $ 6,633.5 Equity securities at fair value 112.6 113.9 Commercial mortgage loans on real estate, at amortized cost 599.0 616.0 Short-term investments 58.7 41.2 Other investments 14.8 52.0 Total investments 7,546.1 7,456.6 Cash and cash equivalents 27.3 21.0 Premiums and accounts receivable 4.2 7.5 Reinsurance recoverables 3,235.4 3,234.5 Accrued investment income 66.8 62.7 Deferred acquisition costs (1) 334.0 185.5 Property and equipment, net 49.3 47.2 Value of business acquired 3.9 4.3 Other assets 20.8 22.6 Assets held in separate accounts 2,322.1 2,176.8 Total assets held for sale $ 13,609.9 $ 13,218.7 Liabilities Future policy benefits and expenses $ 8,921.8 $ 8,703.5 Unearned premiums (1) 36.6 14.9 Claims and benefits payable 1,024.2 1,049.2 Commissions payable 10.6 9.4 Reinsurance balances payable 4.1 3.1 Accounts payable and other liabilities 127.2 154.4 Liabilities related to separate accounts 2,322.1 2,176.8 Total liabilities held for sale $ 12,446.6 $ 12,111.3 (1) Deferred acquisition costs and unearned premiums include the impact of changes in unrealized gains (losses) on the amortization. The following table summarizes the components of net income (loss) from discontinued operations included in the consolidated statements of operations: Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Revenues Net earned premiums $ 6.1 $ 16.0 $ 42.6 $ 49.4 Fees and other income 13.6 38.6 91.0 113.6 Net investment income 23.7 71.8 168.4 216.0 Net realized gains (losses) on investments 0.5 (0.6) 4.2 (16.7) Gain on disposal of businesses (1) 926.4 — 920.1 — Total revenues 970.3 125.8 1,226.3 362.3 Benefits, losses and expenses Policyholder benefits 24.6 71.1 172.7 211.6 Amortization of deferred acquisition costs and value of business acquired 7.1 18.9 46.2 56.1 Underwriting, general and administrative expenses 5.7 14.6 39.0 46.8 Goodwill impairment (2) — 137.8 — 137.8 Total benefits, losses and expenses 37.4 242.4 257.9 452.3 Income (loss) from discontinued operations before income taxes 932.9 (116.6) 968.4 (90.0) Provision for income taxes (3) 204.1 1.9 206.4 7.6 Net income (loss) from discontinued operations $ 728.8 $ (118.5) $ 762.0 $ (97.6) (1) Includes $774.2 million of pre-tax AOCI, primarily net unrealized gains on investments, that was recognized in earnings upon sale. (2) During the third quarter of 2020, the Company identified impairment indicators impacting the fair value of the Global Preneed reportable segment in connection with exploring strategic alternatives for the Global Preneed business. Such impairment indicators, including the evaluation of the long-term economic performance of the segment in light of further expected declines in interest rates, triggered the requirement for an interim goodwill impairment analysis in the third quarter of 2020. The fair value, which was determined using a discounted cash flow method, was lower than the carrying value, resulting in the impairment charge of the entire goodwill of $137.8 million. (3) Includes $168.2 million of tax on the AOCI that was recognized in earnings upon sale, as noted above.

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2021
Segment Reporting [Abstract]
Segment Information	Segment Information As of September 30, 2021, the Company had three reportable segments which are defined based on the manner in which the Company’s chief operating decision maker, the Chief Executive Officer (“CEO”), reviews the business to assess performance and allocate resources, and which align to the nature of the products and services offered: • Global Lifestyle; • Global Housing; and • Corporate and Other: includes activities of the holding company, financing and interest expenses, net realized gains (losses) on investments (which includes unrealized gains (losses) on equity securities and changes in fair value of direct investments in collateralized loan obligations), interest income earned from short-term investments held, income (expenses) primarily related to the Company’s frozen benefit plans, amounts related to businesses previously disposed of through reinsurance and the run-off of the Assurant Health business. Corporate and Other also includes goodwill impairments, the foreign currency gains (losses) from remeasurement of monetary assets and liabilities, changes in the fair value of derivative instruments and other expenses related to merger and acquisition activities, as well as other highly variable or unusual items other than reportable catastrophes (reportable catastrophe losses, net of reinsurance and client profit sharing adjustments, and including reinstatement and other premiums). The following tables summarize selected financial information by segment: Three Months Ended September 30, 2021 Global Lifestyle Global Housing Corporate Consolidated Revenues Net earned premiums $ 1,688.5 $ 451.6 $ — $ 2,140.1 Fees and other income 274.5 35.1 — 309.6 Net investment income 48.5 20.2 7.3 76.0 Net realized gains on investments — — 112.1 112.1 Total revenues 2,011.5 506.9 119.4 2,637.8 Benefits, losses and expenses Policyholder benefits 335.1 279.1 — 614.2 Amortization of deferred acquisition costs and value of business acquired 910.0 55.6 — 965.6 Underwriting, general and administrative expenses 614.6 169.5 34.2 818.3 Interest expense — — 27.5 27.5 Loss on extinguishment of debt — — 20.7 20.7 Total benefits, losses and expenses 1,859.7 504.2 82.4 2,446.3 Segment income from continuing operations before provision (benefit) for income tax 151.8 2.7 37.0 191.5 Provision (benefit) for income taxes 27.8 (0.5) 10.6 37.9 Segment net income from continuing operations $ 124.0 $ 3.2 $ 26.4 153.6 Net income from discontinued operations 728.8 Net income 882.4 Less: Net income attributable to non-controlling interests — Net income attributable to stockholders 882.4 Less: Preferred stock dividends — Net income attributable to common stockholders $ 882.4 As of September 30, 2021 Segment assets: $ 25,425.3 $ 4,285.2 $ 3,914.3 $ 33,624.8 Three Months Ended September 30, 2020 Global Lifestyle Global Housing Corporate Consolidated Revenues Net earned premiums $ 1,633.2 $ 453.6 $ — $ 2,086.8 Fees and other income 171.8 37.7 (0.1) 209.4 Net investment income 44.6 16.5 2.2 63.3 Net realized gains on investments — — 17.2 17.2 Total revenues 1,849.6 507.8 19.3 2,376.7 Benefits, losses and expenses Policyholder benefits 365.4 272.8 0.3 638.5 Amortization of deferred acquisition costs and value of business acquired 870.5 56.8 — 927.3 Underwriting, general and administrative expenses 480.8 162.2 29.9 672.9 Interest expense — — 25.5 25.5 Total benefits, losses and expenses 1,716.7 491.8 55.7 2,264.2 Segment income (loss) from continuing operations before provision (benefit) for income taxes 132.9 16.0 (36.4) 112.5 Provision (benefit) for income taxes 26.3 2.9 (4.7) 24.5 Segment net income (loss) from continuing operations $ 106.6 $ 13.1 $ (31.7) 88.0 Net loss from discontinued operations (118.5) Net loss (30.5) Less: Net loss attributable to non-controlling interest 0.3 Net loss attributable to stockholders (30.2) Less: Preferred stock dividends (4.7) Net loss attributable to common stockholders $ (34.9) Nine Months Ended September 30, 2021 Global Lifestyle Global Housing Corporate Consolidated Revenues Net earned premiums $ 5,014.6 $ 1,381.7 $ — $ 6,396.3 Fees and other income 748.5 109.1 0.4 858.0 Net investment income 148.7 63.3 23.2 235.2 Net realized gains on investments — — 123.2 123.2 Total revenues 5,911.8 1,554.1 146.8 7,612.7 Benefits, losses and expenses Policyholder benefits 1,007.3 673.9 — 1,681.2 Amortization of deferred acquisition costs and value of business acquired 2,731.8 171.9 — 2,903.7 Underwriting, general and administrative expenses 1,690.0 501.3 109.9 2,301.2 Interest expense — — 84.7 84.7 Loss on extinguishment of debt — — 20.7 20.7 Total benefits, losses and expenses 5,429.1 1,347.1 215.3 6,991.5 Segment income (loss) from continuing operations before provision (benefit) for income tax 482.7 207.0 (68.5) 621.2 Provision (benefit) for income taxes 105.8 42.7 (14.1) 134.4 Segment net income (loss) from continuing operations $ 376.9 $ 164.3 $ (54.4) 486.8 Net income from discontinued operations 762.0 Net income 1,248.8 Less: Net income attributable to non-controlling interests — Net income attributable to stockholders 1,248.8 Less: Preferred stock dividends (4.7) Net income attributable to common stockholders $ 1,244.1 Nine Months Ended September 30, 2020 Global Lifestyle Global Housing Corporate Consolidated Revenues Net earned premiums $ 4,799.0 $ 1,374.6 $ — $ 6,173.6 Fees and other income 721.6 106.0 1.8 829.4 Net investment income 143.5 54.9 13.9 212.3 Net realized losses on investments — — (37.9) (37.9) Total revenues 5,664.1 1,535.5 (22.2) 7,177.4 Benefits, losses and expenses Policyholder benefits 1,044.7 651.9 0.7 1,697.3 Amortization of deferred acquisition costs and value of business acquired 2,519.7 169.9 — 2,689.6 Underwriting, general and administrative expenses 1,649.4 496.6 144.9 2,290.9 Interest expense — — 77.7 77.7 Total benefits, losses and expenses 5,213.8 1,318.4 223.3 6,755.5 Segment income (loss) from continuing operations before provision (benefit) for income tax 450.3 217.1 (245.5) 421.9 Provision (benefit) for income taxes 101.0 44.4 (124.8) 20.6 Segment net income (loss) from continuing operations $ 349.3 $ 172.7 $ (120.7) 401.3 Net loss from discontinued operations (97.6) Net income 303.7 Less: Net income attributable to non-controlling interest (1.1) Net income attributable to stockholders 302.6 Less: Preferred stock dividends (14.0) Net income attributable to common stockholders $ 288.6

Contract Revenues

Contract Revenues	9 Months Ended
	Sep. 30, 2021
Revenue from Contract with Customer [Abstract]
Contract Revenues	Contract Revenues The Company partners with clients to provide consumers with a diverse range of protection products and services. The Company’s revenues from protection products are accounted for as insurance contracts and are recognized over the term of the insurance protection provided. Revenues from service contracts and sales of products are recognized as the contractual performance obligations are satisfied or the products are delivered. Revenue is measured as the amount of consideration the Company expects to be entitled to in exchange for performing the services or transferring products. If payments are received before the related revenue is recognized, the amount is recorded as unearned revenue or advance payment liabilities, until the performance obligations are satisfied or the products are transferred. The disaggregated revenues from service contracts included in fees and other income on the consolidated statements of operations are $264.0 million and $124.6 million for Global Lifestyle and $22.4 million and $25.3 million for Global Housing for the three months ended September 30, 2021 and 2020, respectively. The disaggregated revenues from service contracts included in fees and other income on the consolidated statement of operations are $730.1 million and $579.3 million for Global Lifestyle and $71.8 million and $71.1 million for Global Housing for the nine months ended September 30, 2021 and 2020, respectively. Global Lifestyle In the Company’s Global Lifestyle segment, revenues from service contracts and sales of products are primarily from the Company’s Connected Living business. Through partnerships with mobile carriers, the Company provides administrative services related to its mobile device protection products, including program design and marketing strategy, risk management, data analytics, customer support and claims handling, supply chain and service delivery, repair and logistics, and device disposition. Administrative fees are generally billed monthly based on the volume of services provided during the billing period (for example, based on the number of mobile subscribers) with payment due within a short-term period. Each service or bundle of services, depending on the contract, is an individual performance obligation with a standalone selling price. The Company recognizes revenue as it invoices, which corresponds to the value transferred to the customer. The Company also repairs, refurbishes and then sells mobile and other electronic devices, on behalf of its clients, for a bundled per unit fee. The entire processing of the device is considered one performance obligation with a standalone selling price and thus, the per unit fee is recognized when the products are sold. Payments are generally due prior to shipment or within a short-term period. Global Housing In the Company’s Global Housing segment, revenues from service contracts and sales of products are primarily from the Company’s Lender-placed Insurance business. Under the Company’s Lender-placed Insurance business, the Company provides loan and claim payment tracking services for lenders. The Company generally invoices its customers weekly or monthly based on the volume of services provided during the billing period with payment due within a short-term period. Each service is an individual performance obligation with a standalone selling price. The Company recognizes revenue as it invoices, which corresponds to the value transferred to the customer. Contract Balances The receivables and unearned revenue under these contracts were $248.9 million and $148.9 million, respectively, as of September 30, 2021, and $257.9 million and $89.8 million, respectively, as of December 31, 2020. These balances are included in premiums and accounts receivable and accounts payable and other liabilities, respectively, in the consolidated balance sheets. Revenue from service contracts and sales of products recognized during the three months ended September 30, 2021 and 2020 that was included in unearned revenue as of December 31, 2020 and 2019 was $12.5 million and $10.3 million, respectively. Revenue from service contracts and sales of products recognized during the nine months ended September 30, 2021 and 2020 that was included in unearned revenue as of December 31, 2020 and 2019 was $47.6 million and $37.5 million, respectively.

Investments

Investments	9 Months Ended
	Sep. 30, 2021
Investments [Abstract]
Investments	Investments The following tables show the cost or amortized cost, allowance for credit losses, gross unrealized gains and losses, and fair value of the Company’s fixed maturity securities as of the dates indicated: September 30, 2021 Cost or Allowance for Credit Losses Gross Gross Fair Value Fixed maturity securities: U.S. government and government agencies and authorities $ 88.3 $ — $ 2.6 $ (0.2) $ 90.7 States, municipalities and political subdivisions 138.3 — 7.6 (0.6) 145.3 Foreign governments 418.3 — 7.9 (2.3) 423.9 Asset-backed 541.3 — 14.6 (0.9) 555.0 Commercial mortgage-backed 468.2 — 13.7 (2.0) 479.9 Residential mortgage-backed 620.7 — 32.8 (0.8) 652.7 U.S. corporate 3,706.9 — 271.0 (12.5) 3,965.4 Foreign corporate 1,289.3 — 55.2 (7.1) 1,337.4 Total fixed maturity securities $ 7,271.3 $ — $ 405.4 $ (26.4) $ 7,650.3 December 31, 2020 Cost or Allowance for Credit Losses Gross Gross Fair Value Fixed maturity securities: U.S. government and government agencies and authorities $ 90.4 $ — $ 3.7 $ — $ 94.1 States, municipalities and political subdivisions 164.4 — 11.0 (0.1) 175.3 Foreign governments 442.4 — 27.4 (0.1) 469.7 Asset-backed 251.9 — 9.4 (0.8) 260.5 Commercial mortgage-backed 266.3 — 16.5 (1.4) 281.4 Residential mortgage-backed 685.8 — 49.0 (0.2) 734.6 U.S. corporate 3,315.6 (1.2) 380.6 (4.4) 3,690.6 Foreign corporate 1,029.0 — 80.6 (0.3) 1,109.3 Total fixed maturity securities $ 6,245.8 $ (1.2) $ 578.2 $ (7.3) $ 6,815.5 The Company’s state, municipality and political subdivision holdings are highly diversified across the U.S., with no individual state, municipality or political subdivision exposure (including both general obligation and revenue securities) exceeding 0.3% and 0.4% of the overall investment portfolio as of September 30, 2021 and December 31, 2020. As of September 30, 2021 and December 31, 2020, the securities included general obligation and revenue bonds issued by states, cities, counties, school districts and similar issuers, including $20.3 million and $39.6 million, respectively, of advance refunded or escrowed-to-maturity bonds (collectively referred to as “pre-refunded revenue bonds”), which are bonds for which an irrevocable trust has been established to fund the remaining payments of principal and interest. As of September 30, 2021 and December 31, 2020, revenue bonds accounted for 53% and 60% of the holdings, respectively. Excluding pre-refunded revenue bonds, the activities supporting the income streams of the Company’s revenue bonds are across a broad range of sectors, primarily water, airport and marina, specifically pledged tax revenues, leases, colleges and universities, and other miscellaneous sources such as bond banks, finance authorities and appropriations. The Company’s investments in foreign government fixed maturity securities are held mainly in countries and currencies where the Company has policyholder liabilities, to facilitate matching of assets to the related liabilities. As of September 30, 2021, approximately 26%, 25% and 14% of the foreign government securities were held in Brazil, Canadian government/ provincials and Mexico, respectively. As of December 31, 2020, approximately 26%, 24% and 16% of the foreign government securities were held in Brazil, Canadian government/provincials and Mexico, respectively. No other country represented more than 9% and 8% of the Company’s foreign government securities as of September 30, 2021 and December 31, 2020, respectively. The Company had European investment exposure in its corporate fixed maturity securities of $735.7 million with a net unrealized gain of $25.9 million as of September 30, 2021 and $589.5 million with a net unrealized gain of $41.8 million as of December 31, 2020. Approximately 37% and 29% of the corporate fixed maturity European exposure was held in the financial industry as of September 30, 2021 and December 31, 2020, respectively. The Company’s largest European country exposure (the United Kingdom) represented approximately 5% and 6% of the fair value of the Company’s corporate fixed maturity securities as of September 30, 2021 and December 31, 2020, respectively. The Company’s international investments are managed as part of the overall portfolio with the same approach to risk management and focus on diversification. The Company had exposure to the energy sector in its corporate fixed maturity securities of $352.8 million with a net unrealized gain of $22.5 million as of September 30, 2021 and $319.4 million with a net unrealized gain of $23.0 million as of December 31, 2020. Approximately 85% and 81% of the energy exposure is rated as investment grade as of September 30, 2021 and December 31, 2020, respectively. The cost or amortized cost and fair value of fixed maturity securities as of September 30, 2021 by contractual maturity are shown below. Actual maturities may differ from contractual maturities because issuers of the securities may have the right to call or prepay obligations with or without call or prepayment penalties. Cost or Fair Value Due in one year or less $ 366.7 $ 371.4 Due after one year through five years 2,423.0 2,533.9 Due after five years through ten years 1,877.8 1,998.1 Due after ten years 973.6 1,059.3 Total 5,641.1 5,962.7 Asset-backed 541.3 555.0 Commercial mortgage-backed 468.2 479.9 Residential mortgage-backed 620.7 652.7 Total $ 7,271.3 $ 7,650.3 The following table sets forth the net realized gains (losses), including impairment, recognized in the consolidated statements of operations for the periods indicated: Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Net realized gains (losses) related to sales and other: Fixed maturity securities $ 16.1 $ 0.6 $ 19.3 $ 6.4 Equity securities (1) (2) 95.1 12.6 100.6 (6.6) Commercial mortgage loans on real estate 0.5 (0.6) 0.7 (0.7) Other investments 0.4 5.9 2.4 9.3 Consolidated investment entities (3) — — — (32.3) Total net realized gains (losses) related to sales and other 112.1 18.5 123.0 (23.9) Net realized gains (losses) related to impairments: Fixed maturity securities (4) — (1.3) 1.2 (2.6) Other investments (1) — — (1.0) (11.4) Total net realized gains (losses) related to impairments — (1.3) 0.2 (14.0) Total net realized gains (losses) $ 112.1 $ 17.2 $ 123.2 $ (37.9) (1) Gross gains of $23.0 million and $25.1 million were realized on equity investments accounted for under the measurement alternative for the three and nine months ended September 30, 2021. Gross gains of $2.2 million were realized on equity investments accounted for under the measurement alternative for the nine months ended September 30, 2020. There were no gross gains realized on equity investments accounted for under the measurement alternative for the three months ended September 30, 2020. The carrying value of equity investments accounted for under the measurement alternative was $112.0 million and $96.5 million as of September 30, 2021 and 2020, respectively. For the nine months ended September 30, 2021 and 2020, there were impairments of $1.0 million and $11.4 million, respectively. There were no impairments for the three months ended September 30, 2021 and 2020. As of September 30, 2021 and 2020, the cumulative carry value fair value increases were $46.0 million and $26.8 million and the cumulative impairment losses were $19.6 million and $12.8 million, respectively. These investments are included within other investments on the consolidated balance sheets. (2) Three and nine months ended September 30, 2021 included $74.6 million of unrealized gains from three equity positions that went public in Third Quarter 2021. The total fair value of these equity securities as of September 30, 2021 was $107.1 million and reported on the Equity Securities line on the consolidated balance sheet. Prior to going public these equity positions were reported within the Other Investments line on the consolidated balance sheet and the fair value as of December 31, 2020 was $31.6 million. (3) Consists of net realized losses from the change in fair value of the Company’s direct investment in collateralized loan obligations (“CLOs”). (4) The Company recorded a $1.2 million allowance for credit losses on fixed maturity securities available for sale for the year ended December 31, 2020. Specific securities, for which the reserve was established, were sold during the three month period ended June 30, 2021 resulting in the elimination of the $1.2 million allowance for credit losses. The following table sets forth the portion of unrealized gains (losses) related to equity securities for the periods indicated: Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Net gains (losses) recognized on equity securities $ 95.1 $ 12.6 $ 100.6 $ (6.6) Less: Net realized gains related to sales of equity securities 1.1 (0.1) 2.1 0.9 Total net unrealized gains (losses) on equity securities held $ 94.0 $ 12.7 $ 98.5 $ (7.5) The investment category and duration of the Company’s gross unrealized losses on fixed maturity securities as of September 30, 2021 and December 31, 2020 were as follows: September 30, 2021 Less than 12 months 12 Months or More Total Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized Fixed maturity securities: U.S. government and government agencies and authorities $ 17.8 $ (0.2) $ — $ — $ 17.8 $ (0.2) States, municipalities and political subdivisions 38.5 (0.6) — — 38.5 (0.6) Foreign governments 107.1 (2.3) — — 107.1 (2.3) Asset-backed 228.9 (0.8) 8.1 (0.1) 237.0 (0.9) Commercial mortgage-backed 156.0 (1.5) 1.8 (0.5) 157.8 (2.0) Residential mortgage-backed 66.1 (0.7) 9.5 (0.1) 75.6 (0.8) U.S. corporate 704.3 (11.3) 14.5 (1.2) 718.8 (12.5) Foreign corporate 414.6 (7.0) 1.7 (0.1) 416.3 (7.1) Total fixed maturity securities $ 1,733.3 $ (24.4) $ 35.6 $ (2.0) $ 1,768.9 $ (26.4) December 31, 2020 Less than 12 months 12 Months or More Total Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized Fixed maturity securities: States, municipalities and political subdivisions $ 6.1 $ (0.1) $ — $ — $ 6.1 $ (0.1) Foreign governments 28.3 (0.1) — — 28.3 (0.1) Asset-backed 54.5 (0.2) 37.4 (0.6) 91.9 (0.8) Commercial mortgage-backed 28.2 (0.7) 3.3 (0.7) 31.5 (1.4) Residential mortgage-backed 23.9 (0.1) 1.5 (0.1) 25.4 (0.2) U.S. corporate 71.9 (2.9) 13.8 (1.5) 85.7 (4.4) Foreign corporate 30.1 (0.3) — — 30.1 (0.3) Total fixed maturity securities $ 243.0 $ (4.4) $ 56.0 $ (2.9) $ 299.0 $ (7.3) Total gross unrealized losses represented approximately 1% and 2% of the aggregate fair value of the related securities as of September 30, 2021 and December 31, 2020. Approximately 92% and 60% of these gross unrealized losses had been in a continuous loss position for less than twelve months as of September 30, 2021 and December 31, 2020, respectively. The total gross unrealized losses are comprised of 909 and 180 individual securities as of September 30, 2021 and December 31, 2020, respectively. In accordance with its policy, the Company concluded that for these securities, the gross unrealized losses as of September 30, 2021 and December 31, 2020 were related to non-credit factors and therefore, did not recognize credit-related losses during the three and nine months ended September 30, 2021. Additionally, the Company currently does not intend to and is not required to sell these investments prior to an anticipated recovery in value. The Company has entered into commercial mortgage loans, collateralized by the underlying real estate, on properties located throughout the U.S. As of September 30, 2021, approximately 43% of the outstanding principal balance of commercial mortgage loans was concentrated in the states of California, Texas and Oregon. Although the Company has a diversified loan portfolio, an economic downturn could have an adverse impact on the ability of its debtors to repay their loans. The outstanding balance of commercial mortgage loans range in size from $0.1 million to $9.7 million as of September 30, 2021 and from $0.1 million to $9.9 million as of December 31, 2020. Credit quality indicators for commercial mortgage loans are loan-to-value and debt-service coverage ratios. The loan-to-value ratio compares the principal amount of the loan to the fair value of the underlying property collateralizing the loan, and is commonly expressed as a percentage. The debt-service coverage ratio compares a property’s net operating income to its debt-service payments and is commonly expressed as a ratio. The loan-to-value and debt-service coverage ratios are generally updated annually in the fourth quarter. The following table presents the amortized cost basis of commercial mortgage loans, excluding the allowance for credit losses, by origination year for certain key credit quality indicators at September 30, 2021 and December 31, 2020. September 30, 2021 Origination Year 2021 2020 2019 2018 2017 Prior Total % of Total Loan to value 70% and less $ 40.6 $ 2.9 $ — $ — $ 4.0 $ 109.3 $ 156.8 68.7 % 71% to 80% 54.9 2.7 — 4.7 — — 62.3 27.3 % 81% to 95% — — — — — 3.2 3.2 1.4 % Greater than 95% — — — — 5.9 — 5.9 2.6 % Total $ 95.5 $ 5.6 $ — $ 4.7 $ 9.9 $ 112.5 $ 228.2 100.0 % September 30, 2021 Origination Year 2021 2020 2019 2018 2017 Prior Total % of Total Debt-service coverage ratios (2): Greater than 2.0 $ 42.2 $ 5.6 $ — $ — $ 4.0 $ 77.3 $ 129.1 56.5 % 1.5 to 2.0 19.9 — — 4.7 — 17.1 41.7 18.3 % 1.0 to 1.5 33.4 — — — — 13.8 47.2 20.7 % Less than 1.0 — — — — 5.9 4.3 10.2 4.5 % Total $ 95.5 $ 5.6 $ — $ 4.7 $ 9.9 $ 112.5 $ 228.2 100.0 % December 31, 2020 Origination Year 2020 2019 2018 2017 2016 Prior Total % of Total Loan to value 70% and less $ 2.9 $ — $ — $ 4.1 $ 29.0 $ 87.1 $ 123.1 88.0 % 71% to 80% 2.6 — 4.8 — — — 7.4 5.3 % 81% to 95% — — — — — 2.2 2.2 1.6 % Greater than 95% — — — 6.0 — 1.2 7.2 5.1 % Total $ 5.5 $ — $ 4.8 $ 10.1 $ 29.0 $ 90.5 $ 139.9 100.0 % December 31, 2020 Origination Year 2020 2019 2018 2017 2016 Prior Total % of Total Debt-service coverage ratios (2): Greater than 2.0 $ 5.5 $ — $ — $ 4.1 $ 26.4 $ 53.3 $ 89.3 63.9 % 1.5 to 2.0 — — 4.8 — 2.6 17.5 24.9 17.8 % 1.0 to 1.5 — — — — — 15.0 15.0 10.7 % Less than 1.0 — — — 6.0 — 4.7 10.7 7.6 % Total $ 5.5 $ — $ 4.8 $ 10.1 $ 29.0 $ 90.5 $ 139.9 100.0 % (1) Loan-to-value ratio derived from current loan balance divided by the fair value of the property. The fair value of the underlying commercial properties is updated at least annually.

Fair Value Disclosures

Fair Value Disclosures	9 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Fair Value Disclosures	Fair Value Disclosures Fair Values, Inputs and Valuation Techniques for Financial Assets and Liabilities Disclosures The fair value measurements and disclosures guidance defines fair value and establishes a framework for measuring fair value. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The Company has categorized its recurring fair value basis financial assets and liabilities into a three-level fair value hierarchy based on the priority of the inputs to the valuation technique. The fair value hierarchy gives the highest priority to quoted prices in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). The inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, the level in the fair value hierarchy within which the fair value measurement in its entirety falls has been determined based on the lowest level input that is significant to the fair value measurement in its entirety. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and takes into account factors specific to the asset or liability. The levels of the fair value hierarchy are described below: • Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company can access. • Level 2 inputs utilize other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the asset or liability. Level 2 inputs include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active and inputs other than quoted prices that are observable in the marketplace for the asset or liability. The observable inputs are used in valuation models to calculate the fair value for the asset or liability. • Level 3 inputs are unobservable but are significant to the fair value measurement for the asset or liability, and include situations where there is little, if any, market activity for the asset or liability. These inputs reflect management’s own assumptions about the assumptions a market participant would use in pricing the asset or liability. The Company reviews fair value hierarchy classifications on a quarterly basis. Changes in the observability of valuation inputs may result in a reclassification of levels for certain securities within the fair value hierarchy. The following tables present the Company’s fair value hierarchy for assets and liabilities measured at fair value on a recurring basis as of September 30, 2021 and December 31, 2020. The amounts presented below for short-term investments, other investments, cash equivalents, other assets, assets held in and liabilities related to separate accounts and other liabilities differ from the amounts presented in the consolidated balance sheets because only certain investments or certain assets and liabilities within these line items are measured at estimated fair value. Other investments are comprised of investments in the Assurant Investment Plan (“AIP”), the American Security Insurance Company Investment Plan, the Assurant Deferred Compensation Plan, a modified coinsurance arrangement and other derivatives. Other liabilities are comprised of investments in the AIP, contingent considerations related to business combinations and other derivatives. The fair value amount and the majority of the associated levels presented for other investments and assets and liabilities held in separate accounts are received directly from third parties. September 30, 2021 Total Level 1 Level 2 Level 3 Financial Assets Fixed maturity securities: U.S. government and government agencies and authorities $ 90.7 $ — $ 90.7 $ — States, municipalities and political subdivisions 145.3 — 145.3 — Foreign governments 423.9 — 423.9 — Asset-backed 555.0 — 555.0 — Commercial mortgage-backed 479.9 — 472.8 7.1 Residential mortgage-backed 652.7 — 652.7 — U.S. corporate 3,965.4 — 3,954.4 11.0 Foreign corporate 1,337.4 — 1,332.6 4.8 Equity securities: Mutual funds 37.7 37.7 — — Common stocks 123.5 14.2 0.7 108.6 (6) Non-redeemable preferred stocks 261.1 — 261.1 — Short-term investments 178.7 160.9 (2) 17.8 — Other investments 225.9 69.2 (1) 156.6 (3) 0.1 Cash equivalents 1,302.8 1,210.9 (2) 91.9 (3) — Other assets 0.3 — 0.3 (4) — Assets held in separate accounts 11.4 7.3 (1) 4.1 (3) — Total financial assets $ 9,791.7 $ 1,500.2 $ 8,159.9 $ 131.6 Financial Liabilities Other liabilities $ 72.0 $ 69.2 (1) $ — $ 2.8 (5) Liabilities related to separate accounts 11.4 7.3 (1) 4.1 (3) — Total financial liabilities $ 83.4 $ 76.5 $ 4.1 $ 2.8 December 31, 2020 Total Level 1 Level 2 Level 3 Financial Assets Fixed maturity securities: U.S. government and government agencies and authorities $ 94.1 $ — $ 94.1 $ — States, municipalities and political subdivisions 175.3 — 175.3 — Foreign governments 469.7 0.5 468.8 0.4 Asset-backed 260.5 — 260.5 — Commercial mortgage-backed 281.4 — 272.7 8.7 Residential mortgage-backed 734.6 — 734.6 — U.S. corporate 3,690.6 — 3,678.6 12.0 Foreign corporate 1,109.3 — 1,105.4 3.9 Equity securities: Mutual funds 42.3 42.3 — — Common stocks 15.2 13.3 0.7 1.2 Non-redeemable preferred stocks 232.7 — 231.6 1.1 Short-term investments 253.5 202.0 (2) 51.5 — Other investments 241.3 72.9 (1) 168.3 (3) 0.1 Cash equivalents 1,558.6 1,536.6 (2) 22.0 (3) — Assets held in separate accounts 11.4 6.7 (1) 4.7 (3) — Total financial assets $ 9,170.5 $ 1,874.3 $ 7,268.8 $ 27.4 Financial Liabilities Other liabilities $ 76.1 $ 72.9 (1) $ 0.5 (4) $ 2.7 (5) Liabilities related to separate accounts 11.4 6.7 (1) 4.7 (3) — Total financial liabilities $ 87.5 $ 79.6 $ 5.2 $ 2.7 (1) Primarily includes mutual funds and related obligations. (2) Primarily includes money market funds. (3) Primarily includes fixed maturity securities and related obligations. (4) Primarily includes derivatives. (5) Includes contingent consideration liabilities and other derivatives. (6) In third quarter 2021, the Company received $107.1 million of common stock through special purpose acquisition company mergers. See Note 7 for additional information. These equity securities are subject to lock up agreements and therefore an illiquidity discount was applied to the exchange traded price, which includes significant unobservable inputs. The following tables disclose the carrying value, fair value and hierarchy level of the financial instruments that are not recognized or are not carried at fair value in the consolidated balance sheets as of the dates indicated: September 30, 2021 Fair Value Carrying Total Level 1 Level 2 Level 3 Financial Assets Commercial mortgage loans on real estate $ 227.3 $ 239.6 $ — $ — $ 239.6 Other investments 20.4 20.4 14.0 — 6.4 Other assets 22.2 22.2 — — 22.2 Total financial assets $ 269.9 $ 282.2 $ 14.0 $ — $ 268.2 Financial Liabilities Policy reserves under investment products (Individual and group annuities, subject to discretionary withdrawal) (1) $ 68.3 $ 80.0 $ — $ — $ 80.0 Funds withheld under reinsurance 350.0 350.0 350.0 — — Debt 2,201.9 2,489.9 — 2,489.9 — Total financial liabilities $ 2,620.2 $ 2,919.9 $ 350.0 $ 2,489.9 $ 80.0 December 31, 2020 Fair Value Carrying Total Level 1 Level 2 Level 3 Financial Assets Commercial mortgage loans on real estate $ 138.3 $ 198.3 $ — $ — $ 198.3 Other investments 52.1 52.1 14.4 — 37.7 Other assets 23.3 23.3 — — 23.3 Total financial assets $ 213.7 $ 273.7 $ 14.4 $ — $ 259.3 Financial Liabilities Policy reserves under investment products (Individual and group annuities, subject to discretionary withdrawal) (1) $ 70.6 $ 85.4 $ — $ — $ 85.4 Funds withheld under reinsurance 358.6 358.6 358.6 — — Debt 2,252.9 2,540.0 — 2,540.0 — Total financial liabilities $ 2,682.1 $ 2,984.0 $ 358.6 $ 2,540.0 $ 85.4

Reserves

Reserves	9 Months Ended
	Sep. 30, 2021
Insurance Loss Reserves [Abstract]
Reserves	Reserves Reserve Roll Forward The following table provides a roll forward of the Company’s beginning and ending claims and benefits payable balances. Claims and benefits payable is the liability for unpaid loss and loss adjustment expenses and is comprised of case and incurred but not reported (“IBNR”) reserves. Since unpaid loss and loss adjustment expenses are estimates, the Company’s actual losses incurred may be more or less than the Company’s previously developed estimates, which is referred to as either unfavorable or favorable development, respectively. The best estimate of ultimate loss and loss adjustment expense is generally selected from a blend of methods that are applied consistently each period. There have been no significant changes in the methodologies and assumptions utilized in estimating the liability for unpaid loss and loss adjustment expenses for any of the periods presented. For the Nine Months Ended September 30, 2021 2020 Claims and benefits payable, at beginning of period $ 1,610.3 $ 1,613.1 Less: Reinsurance ceded and other (849.4) (855.1) Net claims and benefits payable, at beginning of period 760.9 758.0 Incurred losses and loss adjustment expenses related to: Current year 1,706.9 1,739.5 Prior years (25.7) (42.7) Total incurred losses and loss adjustment expenses 1,681.2 1,696.8 Paid losses and loss adjustment expenses related to: Current year 1,152.0 1,187.5 Prior years 447.7 434.5 Total paid losses and loss adjustment expenses 1,599.7 1,622.0 Net claims and benefits payable, at end of period 842.4 832.8 Plus: Reinsurance ceded and other (1) 1,055.0 906.1 Claims and benefits payable, at end of period (1) $ 1,897.4 $ 1,738.9 (1) Includes reinsurance recoverables and claims and benefits payable of $221.6 million and $118.4 million as of September 30, 2021 and 2020, respectively, which was ceded to the U.S. government. The Company acts as an administrator for the U.S. government under the voluntary National Flood Insurance Program.

Debt

Debt	9 Months Ended
	Sep. 30, 2021
Debt Disclosure [Abstract]
Debt	Debt The following table shows the principal amount and carrying value of the Company’s outstanding debt, less unamortized discount and issuance costs as applicable, as of September 30, 2021 and December 31, 2020: September 30, 2021 December 31, 2020 Principal Amount Carrying Value Principal Amount Carrying Value Floating Rate Senior Notes due March 2021 (1) $ — $ — $ 50.0 $ 50.0 4.00% Senior Notes due March 2023 (2) — — 350.0 348.9 4.20% Senior Notes due September 2023 300.0 298.8 300.0 298.4 4.90% Senior Notes due March 2028 300.0 297.4 300.0 297.2 3.70% Senior Notes due February 2030 350.0 347.2 350.0 347.0 2.65% Senior Notes due January 2032 350.0 346.3 — — 6.75% Senior Notes due February 2034 275.0 272.4 275.0 272.3 7.00% Fixed-to-Floating Rate Subordinated Notes due March 2048 (3) 400.0 395.8 400.0 395.4 5.25% Subordinated Notes due January 2061 250.0 244.0 250.0 243.7 Total Debt $ 2,201.9 $ 2,252.9 (1) The outstanding aggregate principal amount was repaid in January 2021. Prior to repayment, these senior notes bore floating interest at a rate equal to three-month LIBOR plus 1.25% per annum. (2) The outstanding aggregate principal amount was redeemed in full in July 2021. (3) Bears a 7.00% annual interest rate to March 2028 and an annual interest rate equal to three-month LIBOR plus 4.135% thereafter. Debt Issuance 2032 Senior Notes: In June 2021, the Company issued senior notes due January 2032 with an aggregate principal amount of $350.0 million, which bear interest at a rate of 2.65% per year and were issued at a 0.158% discount to the public (the “2032 Senior Notes”). Interest is payable semi-annually in arrears on January 15 and July 15 of each year, beginning on January 15, 2022. Prior to October 15, 2031, the Company may redeem the 2032 Senior Notes at any time in whole or from time to time in part at a make-whole premium plus accrued and unpaid interest. On or after that date, the Company may redeem the 2032 Senior Notes at any time in whole or from time to time in part at a redemption price equal to 100% of the principal amount being redeemed plus accrued and unpaid interest. In July 2021, the Company used the net proceeds from the sale of the 2032 Senior Notes, together with cash on hand, to redeem all of the $350.0 million outstanding aggregate principal amount of its 4.00% senior notes due March 2023 and to pay accrued interest, related premiums, fees and expenses, including a loss on extinguishment of debt of $20.7 million which was recorded during the three months ended September 30, 2021. The interest rate payable on the 2032 Senior Notes will be subject to adjustment from time to time, if either Moody’s Investor Service, Inc. (“Moody’s”) or S&P Global Ratings, a division of S&P Global Inc. (“S&P”) downgrades the credit rating assigned to such series of senior notes to Ba1 or below or to BB+ or below, respectively, or subsequently upgrades the credit ratings once the senior notes are at or below such levels. The following table details the increase in interest rate over the issuance rate by rating, with the impact equal to the sum of the number of basis points next to such rating for a maximum increase of 200 basis points over the issuance rate: Rating Agencies Rating Levels Moody’s (1) S&P (1) Interest Rate Increase (2) 1 Ba1 BB+ 25 basis points 2 Ba2 BB 50 basis points 3 Ba3 BB- 75 basis points 4 B1 or below B+ or below 100 basis points (1) Including the equivalent ratings of any substitute rating agency. (2) Applies to each rating agency individually. Credit Facility The Company has a senior unsecured $450.0 million revolving credit agreement (the “Credit Facility”) with a syndicate of banks arranged by JPMorgan Chase Bank, N.A. and Wells Fargo Bank, National Association (the “Lenders”). The Credit Facility provides for revolving loans and the issuance of multi-bank, syndicated letters of credit and letters of credit from a sole issuing bank in an aggregate amount of $450.0 million, which may be increased up to $575.0 million. The Credit Facility is available until December 2022, provided the Company is in compliance with all covenants. The Credit Facility has a sub-limit for letters of credit issued thereunder of $50.0 million. The proceeds from these loans may be used for the Company’s commercial paper program or for general corporate purposes. As of September 30, 2021, no borrowings were outstanding under the Credit Facility, and $445.5 million was available under the Credit Facility due to $4.5 million of letters of credit outstanding. Interest Rate Derivatives In March 2018, the Company exercised a series of derivative transactions it had entered into in 2017 to hedge the interest rate risk related to expected borrowing to finance the acquisition of TWG Holdings Limited and its subsidiaries. The Company determined that the derivatives qualified for hedge accounting as effective cash flow hedges and recognized a deferred gain of $26.7 million upon settlement that was reported through other comprehensive income. The deferred gain is being recognized as a reduction in interest expense related to the 4.20% senior notes due 2023, the 4.90% senior notes due 2028 and the 7.00% fixed-to-floating rate subordinated notes due 2048, in each case on an effective yield basis. The amortization of the deferred gain for the three months ended September 30, 2021 and 2020 was $0.7 million, and the amortization of deferred gain for the nine months ended September 30, 2021 and 2020 was $2.2 million. The remaining deferred gain as of September 30, 2021 was $16.4 million.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	9 Months Ended
	Sep. 30, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income	Accumulated Other Comprehensive Income Certain amounts included in the consolidated statements of comprehensive income are net of reclassification adjustments. The following tables summarize those reclassification adjustments (net of taxes) for the periods indicated: Three Months Ended September 30, 2021 Foreign Net unrealized Net unrealized gains on derivative transactions Unamortized net losses on Pension Plans Accumulated Balance at June 30, 2021 $ (274.8) $ 974.5 $ 13.5 $ (109.2) $ 604.0 Change in accumulated other comprehensive income (loss) before reclassifications (23.4) (44.6) — 0.3 (67.7) Amounts reclassified from accumulated other comprehensive income (loss) (1) (0.3) (618.5) (0.6) (1.0) (620.4) Net current-period other comprehensive income (loss) (23.7) (663.1) (0.6) (0.7) (688.1) Balance at September 30, 2021 $ (298.5) $ 311.4 $ 12.9 $ (109.9) $ (84.1) Three Months Ended September 30, 2020 Foreign Net unrealized Net unrealized gains on derivative transactions Unamortized net losses on Pension Plans Accumulated Balance at June 30, 2020 $ (379.0) $ 1,003.4 $ 15.9 $ (71.4) $ 568.9 Change in accumulated other comprehensive income (loss) before reclassifications 35.3 55.3 — (0.5) 90.1 Amounts reclassified from accumulated other comprehensive income (loss) — 1.5 (0.6) (1.7) (0.8) Net current-period other comprehensive income (loss) 35.3 56.8 (0.6) (2.2) 89.3 Balance at September 30, 2020 $ (343.7) $ 1,060.2 $ 15.3 $ (73.6) $ 658.2 Nine Months Ended September 30, 2021 Foreign Net unrealized Net unrealized gains on derivative transactions Unamortized net losses on Pension Plans Accumulated Balance at December 31, 2020 $ (295.6) $ 1,097.6 $ 14.7 $ (106.9) $ 709.8 Change in accumulated other comprehensive income (loss) before reclassifications (2.6) (162.5) — 0.6 (164.5) Amounts reclassified from accumulated other comprehensive income (loss) (1) (0.3) (623.7) (1.8) (3.6) (629.4) Net current-period other comprehensive income (loss) (2.9) (786.2) (1.8) (3.0) (793.9) Balance at September 30, 2021 $ (298.5) $ 311.4 $ 12.9 $ (109.9) $ (84.1) Nine Months Ended September 30, 2020 Foreign Net unrealized Net unrealized gains on derivative transactions Unamortized net (losses) gains on Pension Plans (2) Accumulated Balance at December 31, 2019 $ (358.9) $ 872.0 $ 17.1 $ (118.7) $ 411.5 Change in accumulated other comprehensive income (loss) before reclassifications (23.2) 189.4 — 48.4 214.6 Amounts reclassified from accumulated other comprehensive income (loss) 38.4 (1.2) (1.8) (3.3) 32.1 Net current-period other 15.2 188.2 (1.8) 45.1 246.7 Balance at September 30, 2020 $ (343.7) $ 1,060.2 $ 15.3 $ (73.6) $ 658.2 (1) Three and nine months ended September 30, 2021 include $0.3 million of foreign currency translation adjustments and $605.7 million of net unrealized gains on investments, for a total of $606.0 million, that were recognized through income from discontinued operations upon the sale of the disposed Global Preneed business. Refer to Note 4 for additional information. (2) The Retirement Health Benefits plan was amended in February 2020, which resulted in a prior service credit recognized in other comprehensive income that will be recognized in income over the remaining period of the plan. Refer to Note 15 for additional information. The following tables summarize the reclassifications out of accumulated other comprehensive income (“AOCI”) for the periods indicated: Details about accumulated other comprehensive income components Amount reclassified from Affected line item in the Three Months Ended September 30, 2021 2020 Foreign currency translation adjustment $ (0.8) $ — (1) 0.5 — (1) $ (0.3) $ — Net of tax Net unrealized (gains) losses on investments $ (789.6) $ 1.8 Net realized gains (losses) on investments (1) 171.1 (0.3) Provision for income taxes (1) $ (618.5) $ 1.5 Net of tax Net unrealized gains on derivative transactions $ (0.7) $ (0.7) Interest expense 0.1 0.1 Provision for income taxes $ (0.6) $ (0.6) Net of tax Amortization of pension and postretirement unrecognized net periodic benefit cost: Amortization of net loss $ 1.8 $ 1.3 (2) Amortization of prior service credit (3.4) (3.4) (2) Settlement loss 0.3 — (2) (1.3) (2.1) 0.3 0.4 Provision for income taxes $ (1.0) $ (1.7) Net of tax Total reclassifications for the period $ (620.4) $ (0.8) Net of tax Details about accumulated other comprehensive income components Amount reclassified from Affected line item in the Nine Months Ended September 30, 2021 2020 Foreign currency translation adjustment $ (0.8) $ 38.4 Underwriting, general and administrative expenses (1) 0.5 — Provision for income taxes (1) $ (0.3) $ 38.4 Net of tax Net unrealized gains on investments $ (796.1) $ (1.6) Net realized gains (losses) on investments (1) 172.4 0.4 Provision for income taxes (1) $ (623.7) $ (1.2) Net of tax Net unrealized gains on derivative transactions $ (2.1) $ (2.1) Interest expense 0.3 0.3 Provision for income taxes $ (1.8) $ (1.8) Net of tax Amortization of pension and postretirement unrecognized net periodic benefit cost: Amortization of net loss $ 5.4 $ 3.8 (2) Amortization of prior service credit (10.2) (7.9) (2) Settlement loss 0.3 — (2) (4.5) (4.1) 0.9 0.8 Provision for income taxes $ (3.6) $ (3.3) Net of tax Total reclassifications for the period $ (629.4) $ 32.1 Net of tax (1) Three and nine months ended September 30, 2021 include $0.3 million after-tax ($0.8 million pre-tax) of foreign currency translation adjustments and $605.7 million after-tax ($773.4 million pre-tax) of net unrealized gains on investments, for a total of $606.0 million after-tax ($774.2 million pre-tax) that were recognized through income from discontinued operations upon the sale of the disposed Global Preneed business. Refer to Note 4 for additional information. (2) These AOCI components are included in the computation of net periodic pension cost. See Note 15 for additional information.

Stock Based Compensation

Stock Based Compensation	9 Months Ended
	Sep. 30, 2021
Share-based Payment Arrangement [Abstract]
Stock Based Compensation	Stock Based Compensation Under the Assurant, Inc. 2017 Long-Term Equity Incentive Plan (the “ALTEIP”), as amended in May 2021, the Company is authorized to issue up to 1,840,112 new shares of the Company’s common stock to employees, officers and non-employee directors. Under the ALTEIP, the Company may grant awards based on shares of its common stock, including stock options, stock appreciation rights, restricted stock (including performance shares), unrestricted stock, restricted stock units (“RSUs”), performance share units (“PSUs”) and dividend equivalents. All share-based grants are awarded under the ALTEIP. Restricted Stock Units The following table shows a summary of RSU activity during the three and nine months ended September 30, 2021 and 2020: Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 RSU compensation expense $ 8.8 $ 7.2 $ 23.5 $ 20.8 Income tax benefit (1.5) (1.4) (4.2) (3.8) RSU compensation expense, net of tax $ 7.3 $ 5.8 $ 19.3 $ 17.0 RSUs granted 18,590 32,844 216,983 294,794 Weighted average grant date fair value per unit $ 156.85 $ 101.81 $ 140.60 $ 92.20 Total fair value of vested RSUs $ 9.7 $ 4.8 $ 42.0 $ 29.2 As of September 30, 2021, there was $26.2 million of unrecognized compensation cost related to outstanding RSUs. That cost is expected to be recognized over a weighted-average period of 1.1 years. Performance Share Units The following table shows a summary of PSU activity during the three and nine months ended September 30, 2021 and 2020: Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 PSU compensation expense $ 8.9 $ 7.6 $ 23.7 $ 19.7 Income tax benefit (1.1) (0.8) (2.9) (2.1) PSU compensation expense, net of tax $ 7.8 $ 6.8 $ 20.8 $ 17.6 PSUs granted — — 208,040 302,274 Weighted average grant date fair value per unit $ — $ — $ 148.04 $ 87.36 Total fair value of vested PSUs $ 2.1 $ 0.3 $ 24.6 $ 24.7 As of September 30, 2021, there was $29.5 million of unrecognized compensation cost related to outstanding PSUs. That cost is expected to be recognized over a weighted-average period of 0.9 year.

Equity Transactions

Equity Transactions	9 Months Ended
	Sep. 30, 2021
Class of Stock Disclosures [Abstract]
Equity Transactions	Equity Transactions Stock Repurchase During the nine months ended September 30, 2021 and 2020, the Company repurchased 3,513,870 and 1,312,443 shares of the Company’s outstanding common stock at a cost of $554.7 million and $153.2 million, exclusive of commissions, respectively, leaving $1.13 billion aggregate cost at purchase remaining unused under the existing repurchase authorizations as of September 30, 2021. Shares repurchased during the nine months ended September 30, 2021 were retired upon acquisition. The timing and the amount of future repurchases will depend on market conditions, the Company’s financial condition, results of operations and liquidity and other factors. Mandatory Convertible Preferred Stock (“MCPS”) In March 2018, the Company issued 2,875,000 shares of the MCPS, with a par value of $1.00 per share, at a public offering price of $100.00 per share. Each outstanding share of MCPS converted in March 2021 into 0.9405 of common shares, or 2,703,911 common shares in total plus an immaterial amount of cash in lieu of fractional shares. The Company used a portion of its treasury stock for the common shares, using the average cost method to account for the reissuance of such shares.

Earnings Per Common Share

Earnings Per Common Share	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
Earnings Per Common Share	Earnings Per Common Share The following table presents net income, the weighted average common shares used in calculating basic EPS and those used in calculating diluted EPS for each period presented below. Diluted EPS reflects the incremental common shares from: (1) common shares issuable upon vesting of PSUs and the purchase of shares under the Employee Stock Purchase Plan (the “ESPP”) using the treasury stock method; and (2) common shares issuable upon the conversion of the MCPS using the if-converted method. Refer to Notes 12 and 13 for further information regarding potential common stock issuances. The outstanding RSUs have non-forfeitable rights to dividend equivalents and are therefore included in calculating basic and diluted EPS under the two-class method. Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Numerator Net income from continuing operations $ 153.6 $ 88.0 $ 486.8 $ 401.3 Less: Net loss (income) attributable to non-controlling interest — 0.3 — (1.1) Net income from continuing operations attributable to stockholders 153.6 88.3 486.8 400.2 Less: Preferred stock dividends — (4.7) (4.7) (14.0) Net income from continuing operations attributable to common stockholders 153.6 83.6 482.1 386.2 Less: Common stock dividends paid (38.5) (37.5) (118.5) (115.1) Undistributed earnings $ 115.1 $ 46.1 $ 363.6 $ 271.1 Net income from continuing operations attributable to common stockholders $ 153.6 $ 83.6 $ 482.1 $ 386.2 Add: Net income (loss) from discontinued operations 728.8 (118.5) 762.0 (97.6) Net income (loss) attributable to common stockholders $ 882.4 $ (34.9) $ 1,244.1 $ 288.6 Denominator Weighted average common shares outstanding used in basic per common share calculations 59,126,313 60,190,103 59,769,690 60,384,817 Incremental common shares from: PSUs 352,918 233,039 371,793 253,982 ESPP 233 2,580 — 2,146 MCPS — — 713,838 2,699,913 Weighted average common shares outstanding used in diluted per common share calculations 59,479,464 60,425,722 60,855,321 63,340,858 Earnings per common share - Basic Distributed earnings $ 0.65 $ 0.62 $ 1.98 $ 1.91 Undistributed earnings 1.95 0.77 6.09 4.48 Net income from continuing operations 2.60 1.39 8.07 6.39 Net income (loss) from discontinued operations 12.32 (1.97) 12.74 (1.61) Net income (loss) attributable to common stockholders $ 14.92 $ (0.58) $ 20.81 $ 4.78 Earnings per common share - Diluted Distributed earnings $ 0.65 $ 0.62 $ 1.95 $ 1.82 Undistributed earnings 1.93 0.76 6.05 4.50 Net income from continuing operations 2.58 1.38 8.00 6.32 Net income (loss) from discontinued operations 12.25 (1.96) 12.52 (1.54) Net income (loss) attributable to common stockholders $ 14.83 $ (0.58) $ 20.52 $ 4.78

Retirement and Other Employee B

Retirement and Other Employee Benefits	9 Months Ended
	Sep. 30, 2021
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
Retirement and Other Employee Benefits	Retirement and Other Employee BenefitsThe Company and its subsidiaries participate in a non-contributory, qualified defined benefit pension plan (“Assurant Pension Plan”) covering substantially all employees prior to closing to new hires on January 1, 2014. The Company also has various non-contributory, non-qualified supplemental plans covering certain employees, including the Assurant Executive Pension Plan and the Assurant Supplemental Executive Retirement Plan. The qualified and non-qualified plans are referred to as “Pension Benefits” unless otherwise noted. In addition, the Company provides certain life and health care benefits (“Retirement Health Benefits”) for retired employees and their dependents. The Pension Benefits and Retirement Health Benefits (together, the “Plans”) were frozen on March 1, 2016. In February 2020, the Company amended the Retirement Health Benefits to terminate effective December 31, 2024 (the “Termination Date”). Benefits will be paid up to the Termination Date. The Retirement Health Benefits obligations were re-measured using a discount rate of 1.55%, selected based on a cash flow analysis using a bond yield curve as of February 29, 2020, and the fair market value of the Retirement Health Benefits assets as of February 29, 2020. The remeasurement resulted in a reduction to the Retirement Health Benefits obligations of $65.6 million and a corresponding prior service credit in AOCI, which will be reclassified from AOCI as it is amortized in the net periodic benefit cost over the remaining period until the Termination Date. The following tables present the components of net periodic benefit cost for the Plans for the three and nine months ended September 30, 2021 and 2020: Qualified Pension Benefits Unfunded Non-qualified Retirement Health For the Three Months Ended September 30, For the Three Months Ended September 30, For the Three Months Ended September 30, 2021 2020 2021 2020 2021 2020 Interest cost $ 3.5 $ 5.1 $ 0.3 $ 0.5 $ 0.1 $ 0.1 Expected return on plan assets (6.8) (7.7) — — (0.4) (0.8) Amortization of prior service credit — — — — (3.4) (3.4) Amortization of net loss (gain) 1.2 0.7 0.8 0.6 (0.2) — Settlement loss — — 0.3 — — — Net periodic benefit cost $ (2.1) $ (1.9) $ 1.4 $ 1.1 $ (3.9) $ (4.1) Qualified Pension Benefits Unfunded Nonqualified Retirement Health For the Nine Months Ended September 30, For the Nine Months Ended September 30, For the Nine Months Ended September 30, 2021 2020 2021 2020 2021 2020 Interest cost $ 10.5 $ 15.3 $ 0.9 $ 1.5 $ 0.1 $ 0.6 Expected return on plan assets (20.6) (23.1) — — (1.2) (1.3) Amortization of prior service credit — — — — (10.2) (7.9) Amortization of net loss (gain) 3.6 2.1 2.4 1.7 (0.4) — Settlement loss — — 0.3 — — — Net periodic benefit cost $ (6.5) $ (5.7) $ 3.6 $ 3.2 $ (11.7) $ (8.6)

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Letters of Credit In the normal course of business, letters of credit are issued primarily to support reinsurance arrangements in which the Company is the reinsurer. These letters of credit are supported by commitments under which the Company is required to indemnify the financial institution issuing the letter of credit if the letter of credit is drawn. The Company had $7.2 million and $7.6 million of letters of credit outstanding as of September 30, 2021 and December 31, 2020, respectively. Legal and Regulatory Matters The Company is involved in a variety of litigation and legal and regulatory proceedings relating to its current and past business operations and, from time to time, it may become involved in other such actions. The Company continues to defend itself vigorously in these proceedings. The Company has participated and may participate in settlements on terms that the Company considers reasonable.

Basis of Presentation (Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited interim Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information. Accordingly, these statements do not include all of the information and notes required by GAAP for complete financial statements. The interim financial data as of September 30, 2021 and for the three and nine months ended September 30, 2021 and 2020 is unaudited. In the opinion of management, the interim data includes all adjustments necessary for a fair statement of the results for the interim periods. The unaudited interim Consolidated Financial Statements include the accounts of the Company and all of its wholly owned subsidiaries. All inter-company transactions and balances are eliminated in consolidation. Certain prior period amounts have been reclassified to conform to the current year presentation, including the impacts of businesses held for sale and discontinued operations as further summarized in Note 4.
Recent Accounting Pronouncements	Recent Accounting Pronouncements Adopted Simplifying the Accounting for Income Taxes : In December 2019, the Financial Accounting Standards Board (“FASB”) issued new guidance to simplify the accounting for income taxes by removing certain exceptions to the general principles and also simplify areas such as franchise taxes, step-up in tax basis goodwill, separate entity financial statements and interim recognition of enactment of tax laws or rate changes. The standard was adopted by the Company beginning on January 1, 2021 with no material impact on its financial position or results of operations. Not Yet Adopted Targeted improvements to the accounting for long-duration contracts : In August 2018, the FASB issued guidance that provides targeted improvements to the accounting for long-duration contracts. The guidance includes the following primary changes: assumptions supporting benefit reserves will no longer be locked-in but must be updated at least annually with the impact of changes to the liability reflected in earnings (except for discount rates); the discount rate assumptions will be based on the upper-medium grade (low credit risk) fixed-income instrument yield instead of the earnings rate of invested assets; the discount rate must be evaluated at each reporting date and the impact of changes to the liability estimate as a result of updating the discount rate assumption is required to be recognized in other comprehensive income; the provision for adverse deviation is eliminated; and premium deficiency testing is eliminated. Other noteworthy changes include the following: differing models for amortizing deferred acquisition costs will become uniform for all long-duration contracts based on a constant rate over the expected term of the related in-force contracts; all market risk benefits associated with deposit contracts must be reported at fair value with changes reflected in income except for changes related to credit risk which will be recognized in other comprehensive income; and disclosures will be expanded to include disaggregated roll forwards of the liability for future policy benefits, policyholder account balances, market risk benefits, separate account liabilities, and deferred acquisition costs, as well as information about significant inputs, judgments, assumptions and methods used in measurement. The guidance is effective for fiscal years beginning after December 15, 2022, and interim periods within those fiscal years. Early adoption is permitted. Generally, the amendments are applied retrospectively as of the beginning of the earliest period presented with two transition options available for changing the assumptions. The Company is evaluating the requirements of this guidance and the potential impact on the Company’s financial position and results of operations. Facilitation of the Effects of Reference Rate Reform on Financial Reporting: In March 2020, the FASB issued guidance which provides optional expedients and exceptions for applying GAAP to contract modifications and hedging relationships, subject to meeting certain criteria, that reference LIBOR or another reference rate expected to be discontinued. The relief is applicable only to legacy contracts if the amendments made to the agreements are solely for reference rate reform activities. The provisions must be applied consistently for all relevant transactions other than derivatives, which may be applied at a hedging relationship level. The guidance is effective upon issuance. The guidance on contract modifications is applied prospectively from any date beginning March 12, 2020. Unlike other topics, the provisions of this update are only available until December 31, 2022, when the reference rate replacement activity is expected to have been completed. The adoption of this standard is expected to have no material impact on the Company’s financial position and results of operations. Improvements to Convertible Instruments and Contracts in an Entity’s Own Equity : In August 2020, the FASB issued guidance that simplifies accounting for convertible instruments by removing major separation models required under current GAAP. Consequently, more convertible debt instruments will be reported as a single liability instrument and more convertible preferred stock as a single equity instrument with no separate accounting for embedded conversion features. The guidance removes certain settlement conditions that are required for equity contracts to qualify for the derivative scope exception, which will permit more contracts in an entity’s own equity to qualify for it. The guidance also simplifies the diluted earnings per common share (“EPS”) calculation in the areas of convertible instruments and instruments that qualify for the derivatives scope exception for contracts in an entity’s own equity to address accounting for the guidance changes to the classification, recognition and measurement. The guidance is effective for fiscal years beginning after December 15, 2021, and interim periods within those fiscal years. Early adoption is permitted, but no earlier than fiscal years beginning after December 15, 2020, including interim periods within those fiscal years. The adoption of this standard is expected to have no material impact on the Company’s financial position and results of operations. Recognition and Measurement of Revenue Contracts with Customers Acquired in a Business Combination : In October 2021, the FASB issued guidance to improve comparability after a business combination is reported in the acquirer’s financial statements by providing consistent recognition and measurement guidance for revenue contracts with customers acquired in a business combination and revenue contracts with customers not acquired in a business combination. Generally, the acquirer will recognize the acquired contract assets and contract liabilities at the same amounts recorded by the acquiree. Historically, such amounts were recognized by the acquirer at fair value in the acquisition accounting. Under the amended guidance, the acquirer should account for the related revenue contracts as if it had originated the contracts. The amendments provide certain practical expedients for acquirers when recognizing and measuring acquired contract assets and contract liabilities from revenue contracts in a business combination. The guidance is effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. The amendments should be applied prospectively to business combinations occurring on or after the effective date of the amendments. Early adoption of the amendment is permitted, including adoption in an interim period. An entity that early adopts in an interim period should apply the amendments (1) retrospectively to all business combinations for which the acquisition date occurs on or after the beginning of the fiscal year that includes the interim period of early application and (2) prospectively
Business Held for Sale and Discontinued Operations	The Company reports a business as held for sale when management has received approval to sell the business and is committed to a formal plan, the business is available for immediate sale, the business is being actively marketed, the sale is anticipated to occur during the ensuing year and certain other specified criteria are met. A business classified as held for sale is recorded at the lower of its carrying amount or estimated fair value less costs to sell, which is required to be remeasured each reporting period. If the carrying amount of the business exceeds its estimated fair value, which is based on the estimated sales price of the transaction, less costs to sell, a loss is recognized. Depreciation is not recorded on assets of a business classified as held for sale. The Company reports the results of operations of a business as discontinued operations if (i) the business is classified as held for sale; (ii) the business represents a strategic shift that will have a major impact on the Company’s operations and financial results; (iii) the operations and cash flows of the business have been or will be eliminated from the ongoing operations of the Company as a result of the disposal transaction; and (iv) the Company will not have any significant continuing involvement in the operations of the business after the disposal transaction. The results of discontinued operations are reported in net income from discontinued operations in the consolidated statements of operations for all periods presented, commencing in the period in which the business is either disposed of or is classified as held for sale, including any gain or loss recognized on closing or adjustment of the carrying amount to fair value less costs to sell. Assets and liabilities related to a business classified as held for sale which also meets the criteria for discontinued operations are segregated in the consolidated balance sheets for the current and prior periods presented.

Business Held for Sale and Di_2

Business Held for Sale and Discontinued Operations (Tables)	9 Months Ended
	Sep. 30, 2021
Discontinued Operations and Disposal Groups [Abstract]
Schedule of Discontinued Operations	The following table presents the major classes of assets and liabilities as of August 2, 2021, the date of the sale, and the major classes of asset and liabilities held for sale included in the consolidated balance sheet as of December 31, 2020. August 2, 2021 December 31, 2020 Assets Investments: Fixed maturity securities available for sale, at fair value $ 6,761.0 $ 6,633.5 Equity securities at fair value 112.6 113.9 Commercial mortgage loans on real estate, at amortized cost 599.0 616.0 Short-term investments 58.7 41.2 Other investments 14.8 52.0 Total investments 7,546.1 7,456.6 Cash and cash equivalents 27.3 21.0 Premiums and accounts receivable 4.2 7.5 Reinsurance recoverables 3,235.4 3,234.5 Accrued investment income 66.8 62.7 Deferred acquisition costs (1) 334.0 185.5 Property and equipment, net 49.3 47.2 Value of business acquired 3.9 4.3 Other assets 20.8 22.6 Assets held in separate accounts 2,322.1 2,176.8 Total assets held for sale $ 13,609.9 $ 13,218.7 Liabilities Future policy benefits and expenses $ 8,921.8 $ 8,703.5 Unearned premiums (1) 36.6 14.9 Claims and benefits payable 1,024.2 1,049.2 Commissions payable 10.6 9.4 Reinsurance balances payable 4.1 3.1 Accounts payable and other liabilities 127.2 154.4 Liabilities related to separate accounts 2,322.1 2,176.8 Total liabilities held for sale $ 12,446.6 $ 12,111.3 (1) Deferred acquisition costs and unearned premiums include the impact of changes in unrealized gains (losses) on the amortization. The following table summarizes the components of net income (loss) from discontinued operations included in the consolidated statements of operations: Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Revenues Net earned premiums $ 6.1 $ 16.0 $ 42.6 $ 49.4 Fees and other income 13.6 38.6 91.0 113.6 Net investment income 23.7 71.8 168.4 216.0 Net realized gains (losses) on investments 0.5 (0.6) 4.2 (16.7) Gain on disposal of businesses (1) 926.4 — 920.1 — Total revenues 970.3 125.8 1,226.3 362.3 Benefits, losses and expenses Policyholder benefits 24.6 71.1 172.7 211.6 Amortization of deferred acquisition costs and value of business acquired 7.1 18.9 46.2 56.1 Underwriting, general and administrative expenses 5.7 14.6 39.0 46.8 Goodwill impairment (2) — 137.8 — 137.8 Total benefits, losses and expenses 37.4 242.4 257.9 452.3 Income (loss) from discontinued operations before income taxes 932.9 (116.6) 968.4 (90.0) Provision for income taxes (3) 204.1 1.9 206.4 7.6 Net income (loss) from discontinued operations $ 728.8 $ (118.5) $ 762.0 $ (97.6) (1) Includes $774.2 million of pre-tax AOCI, primarily net unrealized gains on investments, that was recognized in earnings upon sale. (2) During the third quarter of 2020, the Company identified impairment indicators impacting the fair value of the Global Preneed reportable segment in connection with exploring strategic alternatives for the Global Preneed business. Such impairment indicators, including the evaluation of the long-term economic performance of the segment in light of further expected declines in interest rates, triggered the requirement for an interim goodwill impairment analysis in the third quarter of 2020. The fair value, which was determined using a discounted cash flow method, was lower than the carrying value, resulting in the impairment charge of the entire goodwill of $137.8 million. (3) Includes $168.2 million of tax on the AOCI that was recognized in earnings upon sale, as noted above.

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2021
Segment Reporting [Abstract]
Financial Information by Segment	The following tables summarize selected financial information by segment: Three Months Ended September 30, 2021 Global Lifestyle Global Housing Corporate Consolidated Revenues Net earned premiums $ 1,688.5 $ 451.6 $ — $ 2,140.1 Fees and other income 274.5 35.1 — 309.6 Net investment income 48.5 20.2 7.3 76.0 Net realized gains on investments — — 112.1 112.1 Total revenues 2,011.5 506.9 119.4 2,637.8 Benefits, losses and expenses Policyholder benefits 335.1 279.1 — 614.2 Amortization of deferred acquisition costs and value of business acquired 910.0 55.6 — 965.6 Underwriting, general and administrative expenses 614.6 169.5 34.2 818.3 Interest expense — — 27.5 27.5 Loss on extinguishment of debt — — 20.7 20.7 Total benefits, losses and expenses 1,859.7 504.2 82.4 2,446.3 Segment income from continuing operations before provision (benefit) for income tax 151.8 2.7 37.0 191.5 Provision (benefit) for income taxes 27.8 (0.5) 10.6 37.9 Segment net income from continuing operations $ 124.0 $ 3.2 $ 26.4 153.6 Net income from discontinued operations 728.8 Net income 882.4 Less: Net income attributable to non-controlling interests — Net income attributable to stockholders 882.4 Less: Preferred stock dividends — Net income attributable to common stockholders $ 882.4 As of September 30, 2021 Segment assets: $ 25,425.3 $ 4,285.2 $ 3,914.3 $ 33,624.8 Three Months Ended September 30, 2020 Global Lifestyle Global Housing Corporate Consolidated Revenues Net earned premiums $ 1,633.2 $ 453.6 $ — $ 2,086.8 Fees and other income 171.8 37.7 (0.1) 209.4 Net investment income 44.6 16.5 2.2 63.3 Net realized gains on investments — — 17.2 17.2 Total revenues 1,849.6 507.8 19.3 2,376.7 Benefits, losses and expenses Policyholder benefits 365.4 272.8 0.3 638.5 Amortization of deferred acquisition costs and value of business acquired 870.5 56.8 — 927.3 Underwriting, general and administrative expenses 480.8 162.2 29.9 672.9 Interest expense — — 25.5 25.5 Total benefits, losses and expenses 1,716.7 491.8 55.7 2,264.2 Segment income (loss) from continuing operations before provision (benefit) for income taxes 132.9 16.0 (36.4) 112.5 Provision (benefit) for income taxes 26.3 2.9 (4.7) 24.5 Segment net income (loss) from continuing operations $ 106.6 $ 13.1 $ (31.7) 88.0 Net loss from discontinued operations (118.5) Net loss (30.5) Less: Net loss attributable to non-controlling interest 0.3 Net loss attributable to stockholders (30.2) Less: Preferred stock dividends (4.7) Net loss attributable to common stockholders $ (34.9) Nine Months Ended September 30, 2021 Global Lifestyle Global Housing Corporate Consolidated Revenues Net earned premiums $ 5,014.6 $ 1,381.7 $ — $ 6,396.3 Fees and other income 748.5 109.1 0.4 858.0 Net investment income 148.7 63.3 23.2 235.2 Net realized gains on investments — — 123.2 123.2 Total revenues 5,911.8 1,554.1 146.8 7,612.7 Benefits, losses and expenses Policyholder benefits 1,007.3 673.9 — 1,681.2 Amortization of deferred acquisition costs and value of business acquired 2,731.8 171.9 — 2,903.7 Underwriting, general and administrative expenses 1,690.0 501.3 109.9 2,301.2 Interest expense — — 84.7 84.7 Loss on extinguishment of debt — — 20.7 20.7 Total benefits, losses and expenses 5,429.1 1,347.1 215.3 6,991.5 Segment income (loss) from continuing operations before provision (benefit) for income tax 482.7 207.0 (68.5) 621.2 Provision (benefit) for income taxes 105.8 42.7 (14.1) 134.4 Segment net income (loss) from continuing operations $ 376.9 $ 164.3 $ (54.4) 486.8 Net income from discontinued operations 762.0 Net income 1,248.8 Less: Net income attributable to non-controlling interests — Net income attributable to stockholders 1,248.8 Less: Preferred stock dividends (4.7) Net income attributable to common stockholders $ 1,244.1 Nine Months Ended September 30, 2020 Global Lifestyle Global Housing Corporate Consolidated Revenues Net earned premiums $ 4,799.0 $ 1,374.6 $ — $ 6,173.6 Fees and other income 721.6 106.0 1.8 829.4 Net investment income 143.5 54.9 13.9 212.3 Net realized losses on investments — — (37.9) (37.9) Total revenues 5,664.1 1,535.5 (22.2) 7,177.4 Benefits, losses and expenses Policyholder benefits 1,044.7 651.9 0.7 1,697.3 Amortization of deferred acquisition costs and value of business acquired 2,519.7 169.9 — 2,689.6 Underwriting, general and administrative expenses 1,649.4 496.6 144.9 2,290.9 Interest expense — — 77.7 77.7 Total benefits, losses and expenses 5,213.8 1,318.4 223.3 6,755.5 Segment income (loss) from continuing operations before provision (benefit) for income tax 450.3 217.1 (245.5) 421.9 Provision (benefit) for income taxes 101.0 44.4 (124.8) 20.6 Segment net income (loss) from continuing operations $ 349.3 $ 172.7 $ (120.7) 401.3 Net loss from discontinued operations (97.6) Net income 303.7 Less: Net income attributable to non-controlling interest (1.1) Net income attributable to stockholders 302.6 Less: Preferred stock dividends (14.0) Net income attributable to common stockholders $ 288.6

Investments (Tables)

Investments (Tables)	9 Months Ended
	Sep. 30, 2021
Investments [Abstract]
Amortized Cost, Gross Unrealized Gains and Losses, Fair Value and OTTI	The following tables show the cost or amortized cost, allowance for credit losses, gross unrealized gains and losses, and fair value of the Company’s fixed maturity securities as of the dates indicated: September 30, 2021 Cost or Allowance for Credit Losses Gross Gross Fair Value Fixed maturity securities: U.S. government and government agencies and authorities $ 88.3 $ — $ 2.6 $ (0.2) $ 90.7 States, municipalities and political subdivisions 138.3 — 7.6 (0.6) 145.3 Foreign governments 418.3 — 7.9 (2.3) 423.9 Asset-backed 541.3 — 14.6 (0.9) 555.0 Commercial mortgage-backed 468.2 — 13.7 (2.0) 479.9 Residential mortgage-backed 620.7 — 32.8 (0.8) 652.7 U.S. corporate 3,706.9 — 271.0 (12.5) 3,965.4 Foreign corporate 1,289.3 — 55.2 (7.1) 1,337.4 Total fixed maturity securities $ 7,271.3 $ — $ 405.4 $ (26.4) $ 7,650.3 December 31, 2020 Cost or Allowance for Credit Losses Gross Gross Fair Value Fixed maturity securities: U.S. government and government agencies and authorities $ 90.4 $ — $ 3.7 $ — $ 94.1 States, municipalities and political subdivisions 164.4 — 11.0 (0.1) 175.3 Foreign governments 442.4 — 27.4 (0.1) 469.7 Asset-backed 251.9 — 9.4 (0.8) 260.5 Commercial mortgage-backed 266.3 — 16.5 (1.4) 281.4 Residential mortgage-backed 685.8 — 49.0 (0.2) 734.6 U.S. corporate 3,315.6 (1.2) 380.6 (4.4) 3,690.6 Foreign corporate 1,029.0 — 80.6 (0.3) 1,109.3 Total fixed maturity securities $ 6,245.8 $ (1.2) $ 578.2 $ (7.3) $ 6,815.5
Amortized Cost and Fair Value of Fixed Maturity Securities by Contractual Maturity	The cost or amortized cost and fair value of fixed maturity securities as of September 30, 2021 by contractual maturity are shown below. Actual maturities may differ from contractual maturities because issuers of the securities may have the right to call or prepay obligations with or without call or prepayment penalties. Cost or Fair Value Due in one year or less $ 366.7 $ 371.4 Due after one year through five years 2,423.0 2,533.9 Due after five years through ten years 1,877.8 1,998.1 Due after ten years 973.6 1,059.3 Total 5,641.1 5,962.7 Asset-backed 541.3 555.0 Commercial mortgage-backed 468.2 479.9 Residential mortgage-backed 620.7 652.7 Total $ 7,271.3 $ 7,650.3
Net Realized Gains (Losses), Including Other-Than-Temporary Impairments	The following table sets forth the net realized gains (losses), including impairment, recognized in the consolidated statements of operations for the periods indicated: Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Net realized gains (losses) related to sales and other: Fixed maturity securities $ 16.1 $ 0.6 $ 19.3 $ 6.4 Equity securities (1) (2) 95.1 12.6 100.6 (6.6) Commercial mortgage loans on real estate 0.5 (0.6) 0.7 (0.7) Other investments 0.4 5.9 2.4 9.3 Consolidated investment entities (3) — — — (32.3) Total net realized gains (losses) related to sales and other 112.1 18.5 123.0 (23.9) Net realized gains (losses) related to impairments: Fixed maturity securities (4) — (1.3) 1.2 (2.6) Other investments (1) — — (1.0) (11.4) Total net realized gains (losses) related to impairments — (1.3) 0.2 (14.0) Total net realized gains (losses) $ 112.1 $ 17.2 $ 123.2 $ (37.9) (1) Gross gains of $23.0 million and $25.1 million were realized on equity investments accounted for under the measurement alternative for the three and nine months ended September 30, 2021. Gross gains of $2.2 million were realized on equity investments accounted for under the measurement alternative for the nine months ended September 30, 2020. There were no gross gains realized on equity investments accounted for under the measurement alternative for the three months ended September 30, 2020. The carrying value of equity investments accounted for under the measurement alternative was $112.0 million and $96.5 million as of September 30, 2021 and 2020, respectively. For the nine months ended September 30, 2021 and 2020, there were impairments of $1.0 million and $11.4 million, respectively. There were no impairments for the three months ended September 30, 2021 and 2020. As of September 30, 2021 and 2020, the cumulative carry value fair value increases were $46.0 million and $26.8 million and the cumulative impairment losses were $19.6 million and $12.8 million, respectively. These investments are included within other investments on the consolidated balance sheets. (2) Three and nine months ended September 30, 2021 included $74.6 million of unrealized gains from three equity positions that went public in Third Quarter 2021. The total fair value of these equity securities as of September 30, 2021 was $107.1 million and reported on the Equity Securities line on the consolidated balance sheet. Prior to going public these equity positions were reported within the Other Investments line on the consolidated balance sheet and the fair value as of December 31, 2020 was $31.6 million. (3) Consists of net realized losses from the change in fair value of the Company’s direct investment in collateralized loan obligations (“CLOs”). (4) The Company recorded a $1.2 million allowance for credit losses on fixed maturity securities available for sale for the year ended December 31, 2020. Specific securities, for which the reserve was established, were sold during the three month period ended June 30, 2021 resulting in the elimination of the $1.2 million allowance for credit losses.
Unrealized Gains on Equity Securities	The following table sets forth the portion of unrealized gains (losses) related to equity securities for the periods indicated: Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Net gains (losses) recognized on equity securities $ 95.1 $ 12.6 $ 100.6 $ (6.6) Less: Net realized gains related to sales of equity securities 1.1 (0.1) 2.1 0.9 Total net unrealized gains (losses) on equity securities held $ 94.0 $ 12.7 $ 98.5 $ (7.5)
Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value	The investment category and duration of the Company’s gross unrealized losses on fixed maturity securities as of September 30, 2021 and December 31, 2020 were as follows: September 30, 2021 Less than 12 months 12 Months or More Total Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized Fixed maturity securities: U.S. government and government agencies and authorities $ 17.8 $ (0.2) $ — $ — $ 17.8 $ (0.2) States, municipalities and political subdivisions 38.5 (0.6) — — 38.5 (0.6) Foreign governments 107.1 (2.3) — — 107.1 (2.3) Asset-backed 228.9 (0.8) 8.1 (0.1) 237.0 (0.9) Commercial mortgage-backed 156.0 (1.5) 1.8 (0.5) 157.8 (2.0) Residential mortgage-backed 66.1 (0.7) 9.5 (0.1) 75.6 (0.8) U.S. corporate 704.3 (11.3) 14.5 (1.2) 718.8 (12.5) Foreign corporate 414.6 (7.0) 1.7 (0.1) 416.3 (7.1) Total fixed maturity securities $ 1,733.3 $ (24.4) $ 35.6 $ (2.0) $ 1,768.9 $ (26.4) December 31, 2020 Less than 12 months 12 Months or More Total Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized Fixed maturity securities: States, municipalities and political subdivisions $ 6.1 $ (0.1) $ — $ — $ 6.1 $ (0.1) Foreign governments 28.3 (0.1) — — 28.3 (0.1) Asset-backed 54.5 (0.2) 37.4 (0.6) 91.9 (0.8) Commercial mortgage-backed 28.2 (0.7) 3.3 (0.7) 31.5 (1.4) Residential mortgage-backed 23.9 (0.1) 1.5 (0.1) 25.4 (0.2) U.S. corporate 71.9 (2.9) 13.8 (1.5) 85.7 (4.4) Foreign corporate 30.1 (0.3) — — 30.1 (0.3) Total fixed maturity securities $ 243.0 $ (4.4) $ 56.0 $ (2.9) $ 299.0 $ (7.3)
Credit Quality Indicators	The following table presents the amortized cost basis of commercial mortgage loans, excluding the allowance for credit losses, by origination year for certain key credit quality indicators at September 30, 2021 and December 31, 2020. September 30, 2021 Origination Year 2021 2020 2019 2018 2017 Prior Total % of Total Loan to value 70% and less $ 40.6 $ 2.9 $ — $ — $ 4.0 $ 109.3 $ 156.8 68.7 % 71% to 80% 54.9 2.7 — 4.7 — — 62.3 27.3 % 81% to 95% — — — — — 3.2 3.2 1.4 % Greater than 95% — — — — 5.9 — 5.9 2.6 % Total $ 95.5 $ 5.6 $ — $ 4.7 $ 9.9 $ 112.5 $ 228.2 100.0 % September 30, 2021 Origination Year 2021 2020 2019 2018 2017 Prior Total % of Total Debt-service coverage ratios (2): Greater than 2.0 $ 42.2 $ 5.6 $ — $ — $ 4.0 $ 77.3 $ 129.1 56.5 % 1.5 to 2.0 19.9 — — 4.7 — 17.1 41.7 18.3 % 1.0 to 1.5 33.4 — — — — 13.8 47.2 20.7 % Less than 1.0 — — — — 5.9 4.3 10.2 4.5 % Total $ 95.5 $ 5.6 $ — $ 4.7 $ 9.9 $ 112.5 $ 228.2 100.0 % December 31, 2020 Origination Year 2020 2019 2018 2017 2016 Prior Total % of Total Loan to value 70% and less $ 2.9 $ — $ — $ 4.1 $ 29.0 $ 87.1 $ 123.1 88.0 % 71% to 80% 2.6 — 4.8 — — — 7.4 5.3 % 81% to 95% — — — — — 2.2 2.2 1.6 % Greater than 95% — — — 6.0 — 1.2 7.2 5.1 % Total $ 5.5 $ — $ 4.8 $ 10.1 $ 29.0 $ 90.5 $ 139.9 100.0 % December 31, 2020 Origination Year 2020 2019 2018 2017 2016 Prior Total % of Total Debt-service coverage ratios (2): Greater than 2.0 $ 5.5 $ — $ — $ 4.1 $ 26.4 $ 53.3 $ 89.3 63.9 % 1.5 to 2.0 — — 4.8 — 2.6 17.5 24.9 17.8 % 1.0 to 1.5 — — — — — 15.0 15.0 10.7 % Less than 1.0 — — — 6.0 — 4.7 10.7 7.6 % Total $ 5.5 $ — $ 4.8 $ 10.1 $ 29.0 $ 90.5 $ 139.9 100.0 % (1) Loan-to-value ratio derived from current loan balance divided by the fair value of the property. The fair value of the underlying commercial properties is updated at least annually.

Fair Value Disclosures (Tables)

Fair Value Disclosures (Tables)	9 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Fair Value Hierarchy for Assets and Liabilities	The following tables present the Company’s fair value hierarchy for assets and liabilities measured at fair value on a recurring basis as of September 30, 2021 and December 31, 2020. The amounts presented below for short-term investments, other investments, cash equivalents, other assets, assets held in and liabilities related to separate accounts and other liabilities differ from the amounts presented in the consolidated balance sheets because only certain investments or certain assets and liabilities within these line items are measured at estimated fair value. Other investments are comprised of investments in the Assurant Investment Plan (“AIP”), the American Security Insurance Company Investment Plan, the Assurant Deferred Compensation Plan, a modified coinsurance arrangement and other derivatives. Other liabilities are comprised of investments in the AIP, contingent considerations related to business combinations and other derivatives. The fair value amount and the majority of the associated levels presented for other investments and assets and liabilities held in separate accounts are received directly from third parties. September 30, 2021 Total Level 1 Level 2 Level 3 Financial Assets Fixed maturity securities: U.S. government and government agencies and authorities $ 90.7 $ — $ 90.7 $ — States, municipalities and political subdivisions 145.3 — 145.3 — Foreign governments 423.9 — 423.9 — Asset-backed 555.0 — 555.0 — Commercial mortgage-backed 479.9 — 472.8 7.1 Residential mortgage-backed 652.7 — 652.7 — U.S. corporate 3,965.4 — 3,954.4 11.0 Foreign corporate 1,337.4 — 1,332.6 4.8 Equity securities: Mutual funds 37.7 37.7 — — Common stocks 123.5 14.2 0.7 108.6 (6) Non-redeemable preferred stocks 261.1 — 261.1 — Short-term investments 178.7 160.9 (2) 17.8 — Other investments 225.9 69.2 (1) 156.6 (3) 0.1 Cash equivalents 1,302.8 1,210.9 (2) 91.9 (3) — Other assets 0.3 — 0.3 (4) — Assets held in separate accounts 11.4 7.3 (1) 4.1 (3) — Total financial assets $ 9,791.7 $ 1,500.2 $ 8,159.9 $ 131.6 Financial Liabilities Other liabilities $ 72.0 $ 69.2 (1) $ — $ 2.8 (5) Liabilities related to separate accounts 11.4 7.3 (1) 4.1 (3) — Total financial liabilities $ 83.4 $ 76.5 $ 4.1 $ 2.8 December 31, 2020 Total Level 1 Level 2 Level 3 Financial Assets Fixed maturity securities: U.S. government and government agencies and authorities $ 94.1 $ — $ 94.1 $ — States, municipalities and political subdivisions 175.3 — 175.3 — Foreign governments 469.7 0.5 468.8 0.4 Asset-backed 260.5 — 260.5 — Commercial mortgage-backed 281.4 — 272.7 8.7 Residential mortgage-backed 734.6 — 734.6 — U.S. corporate 3,690.6 — 3,678.6 12.0 Foreign corporate 1,109.3 — 1,105.4 3.9 Equity securities: Mutual funds 42.3 42.3 — — Common stocks 15.2 13.3 0.7 1.2 Non-redeemable preferred stocks 232.7 — 231.6 1.1 Short-term investments 253.5 202.0 (2) 51.5 — Other investments 241.3 72.9 (1) 168.3 (3) 0.1 Cash equivalents 1,558.6 1,536.6 (2) 22.0 (3) — Assets held in separate accounts 11.4 6.7 (1) 4.7 (3) — Total financial assets $ 9,170.5 $ 1,874.3 $ 7,268.8 $ 27.4 Financial Liabilities Other liabilities $ 76.1 $ 72.9 (1) $ 0.5 (4) $ 2.7 (5) Liabilities related to separate accounts 11.4 6.7 (1) 4.7 (3) — Total financial liabilities $ 87.5 $ 79.6 $ 5.2 $ 2.7 (1) Primarily includes mutual funds and related obligations. (2) Primarily includes money market funds. (3) Primarily includes fixed maturity securities and related obligations. (4) Primarily includes derivatives. (5) Includes contingent consideration liabilities and other derivatives. (6) In third quarter 2021, the Company received $107.1 million of common stock through special purpose acquisition company mergers. See Note 7 for additional information. These equity securities are subject to lock up agreements and therefore an illiquidity discount was applied to the exchange traded price, which includes significant unobservable inputs.
Carrying Value and Fair Value of the Financial Instruments that are Not recognized or are Not Carried at Fair Value	The following tables disclose the carrying value, fair value and hierarchy level of the financial instruments that are not recognized or are not carried at fair value in the consolidated balance sheets as of the dates indicated: September 30, 2021 Fair Value Carrying Total Level 1 Level 2 Level 3 Financial Assets Commercial mortgage loans on real estate $ 227.3 $ 239.6 $ — $ — $ 239.6 Other investments 20.4 20.4 14.0 — 6.4 Other assets 22.2 22.2 — — 22.2 Total financial assets $ 269.9 $ 282.2 $ 14.0 $ — $ 268.2 Financial Liabilities Policy reserves under investment products (Individual and group annuities, subject to discretionary withdrawal) (1) $ 68.3 $ 80.0 $ — $ — $ 80.0 Funds withheld under reinsurance 350.0 350.0 350.0 — — Debt 2,201.9 2,489.9 — 2,489.9 — Total financial liabilities $ 2,620.2 $ 2,919.9 $ 350.0 $ 2,489.9 $ 80.0 December 31, 2020 Fair Value Carrying Total Level 1 Level 2 Level 3 Financial Assets Commercial mortgage loans on real estate $ 138.3 $ 198.3 $ — $ — $ 198.3 Other investments 52.1 52.1 14.4 — 37.7 Other assets 23.3 23.3 — — 23.3 Total financial assets $ 213.7 $ 273.7 $ 14.4 $ — $ 259.3 Financial Liabilities Policy reserves under investment products (Individual and group annuities, subject to discretionary withdrawal) (1) $ 70.6 $ 85.4 $ — $ — $ 85.4 Funds withheld under reinsurance 358.6 358.6 358.6 — — Debt 2,252.9 2,540.0 — 2,540.0 — Total financial liabilities $ 2,682.1 $ 2,984.0 $ 358.6 $ 2,540.0 $ 85.4

Reserves (Tables)

Reserves (Tables)	9 Months Ended
	Sep. 30, 2021
Insurance Loss Reserves [Abstract]
Roll Forward of Claims and Benefits Payable	The following table provides a roll forward of the Company’s beginning and ending claims and benefits payable balances. Claims and benefits payable is the liability for unpaid loss and loss adjustment expenses and is comprised of case and incurred but not reported (“IBNR”) reserves. Since unpaid loss and loss adjustment expenses are estimates, the Company’s actual losses incurred may be more or less than the Company’s previously developed estimates, which is referred to as either unfavorable or favorable development, respectively. The best estimate of ultimate loss and loss adjustment expense is generally selected from a blend of methods that are applied consistently each period. There have been no significant changes in the methodologies and assumptions utilized in estimating the liability for unpaid loss and loss adjustment expenses for any of the periods presented. For the Nine Months Ended September 30, 2021 2020 Claims and benefits payable, at beginning of period $ 1,610.3 $ 1,613.1 Less: Reinsurance ceded and other (849.4) (855.1) Net claims and benefits payable, at beginning of period 760.9 758.0 Incurred losses and loss adjustment expenses related to: Current year 1,706.9 1,739.5 Prior years (25.7) (42.7) Total incurred losses and loss adjustment expenses 1,681.2 1,696.8 Paid losses and loss adjustment expenses related to: Current year 1,152.0 1,187.5 Prior years 447.7 434.5 Total paid losses and loss adjustment expenses 1,599.7 1,622.0 Net claims and benefits payable, at end of period 842.4 832.8 Plus: Reinsurance ceded and other (1) 1,055.0 906.1 Claims and benefits payable, at end of period (1) $ 1,897.4 $ 1,738.9

Debt (Tables)

Debt (Tables)	9 Months Ended
	Sep. 30, 2021
Debt Disclosure [Abstract]
Schedule of Debt	The following table shows the principal amount and carrying value of the Company’s outstanding debt, less unamortized discount and issuance costs as applicable, as of September 30, 2021 and December 31, 2020: September 30, 2021 December 31, 2020 Principal Amount Carrying Value Principal Amount Carrying Value Floating Rate Senior Notes due March 2021 (1) $ — $ — $ 50.0 $ 50.0 4.00% Senior Notes due March 2023 (2) — — 350.0 348.9 4.20% Senior Notes due September 2023 300.0 298.8 300.0 298.4 4.90% Senior Notes due March 2028 300.0 297.4 300.0 297.2 3.70% Senior Notes due February 2030 350.0 347.2 350.0 347.0 2.65% Senior Notes due January 2032 350.0 346.3 — — 6.75% Senior Notes due February 2034 275.0 272.4 275.0 272.3 7.00% Fixed-to-Floating Rate Subordinated Notes due March 2048 (3) 400.0 395.8 400.0 395.4 5.25% Subordinated Notes due January 2061 250.0 244.0 250.0 243.7 Total Debt $ 2,201.9 $ 2,252.9 (1) The outstanding aggregate principal amount was repaid in January 2021. Prior to repayment, these senior notes bore floating interest at a rate equal to three-month LIBOR plus 1.25% per annum. (2) The outstanding aggregate principal amount was redeemed in full in July 2021.
Schedule of Rating Agencies Interest Rate Adjustment	The following table details the increase in interest rate over the issuance rate by rating, with the impact equal to the sum of the number of basis points next to such rating for a maximum increase of 200 basis points over the issuance rate: Rating Agencies Rating Levels Moody’s (1) S&P (1) Interest Rate Increase (2) 1 Ba1 BB+ 25 basis points 2 Ba2 BB 50 basis points 3 Ba3 BB- 75 basis points 4 B1 or below B+ or below 100 basis points (1) Including the equivalent ratings of any substitute rating agency. (2) Applies to each rating agency individually.

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Tables)	9 Months Ended
	Sep. 30, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Components of Accumulated Other Comprehensive Income, Net of Tax	The following tables summarize those reclassification adjustments (net of taxes) for the periods indicated: Three Months Ended September 30, 2021 Foreign Net unrealized Net unrealized gains on derivative transactions Unamortized net losses on Pension Plans Accumulated Balance at June 30, 2021 $ (274.8) $ 974.5 $ 13.5 $ (109.2) $ 604.0 Change in accumulated other comprehensive income (loss) before reclassifications (23.4) (44.6) — 0.3 (67.7) Amounts reclassified from accumulated other comprehensive income (loss) (1) (0.3) (618.5) (0.6) (1.0) (620.4) Net current-period other comprehensive income (loss) (23.7) (663.1) (0.6) (0.7) (688.1) Balance at September 30, 2021 $ (298.5) $ 311.4 $ 12.9 $ (109.9) $ (84.1) Three Months Ended September 30, 2020 Foreign Net unrealized Net unrealized gains on derivative transactions Unamortized net losses on Pension Plans Accumulated Balance at June 30, 2020 $ (379.0) $ 1,003.4 $ 15.9 $ (71.4) $ 568.9 Change in accumulated other comprehensive income (loss) before reclassifications 35.3 55.3 — (0.5) 90.1 Amounts reclassified from accumulated other comprehensive income (loss) — 1.5 (0.6) (1.7) (0.8) Net current-period other comprehensive income (loss) 35.3 56.8 (0.6) (2.2) 89.3 Balance at September 30, 2020 $ (343.7) $ 1,060.2 $ 15.3 $ (73.6) $ 658.2 Nine Months Ended September 30, 2021 Foreign Net unrealized Net unrealized gains on derivative transactions Unamortized net losses on Pension Plans Accumulated Balance at December 31, 2020 $ (295.6) $ 1,097.6 $ 14.7 $ (106.9) $ 709.8 Change in accumulated other comprehensive income (loss) before reclassifications (2.6) (162.5) — 0.6 (164.5) Amounts reclassified from accumulated other comprehensive income (loss) (1) (0.3) (623.7) (1.8) (3.6) (629.4) Net current-period other comprehensive income (loss) (2.9) (786.2) (1.8) (3.0) (793.9) Balance at September 30, 2021 $ (298.5) $ 311.4 $ 12.9 $ (109.9) $ (84.1) Nine Months Ended September 30, 2020 Foreign Net unrealized Net unrealized gains on derivative transactions Unamortized net (losses) gains on Pension Plans (2) Accumulated Balance at December 31, 2019 $ (358.9) $ 872.0 $ 17.1 $ (118.7) $ 411.5 Change in accumulated other comprehensive income (loss) before reclassifications (23.2) 189.4 — 48.4 214.6 Amounts reclassified from accumulated other comprehensive income (loss) 38.4 (1.2) (1.8) (3.3) 32.1 Net current-period other 15.2 188.2 (1.8) 45.1 246.7 Balance at September 30, 2020 $ (343.7) $ 1,060.2 $ 15.3 $ (73.6) $ 658.2 (1) Three and nine months ended September 30, 2021 include $0.3 million of foreign currency translation adjustments and $605.7 million of net unrealized gains on investments, for a total of $606.0 million, that were recognized through income from discontinued operations upon the sale of the disposed Global Preneed business. Refer to Note 4 for additional information. (2) The Retirement Health Benefits plan was amended in February 2020, which resulted in a prior service credit recognized in other comprehensive income that will be recognized in income over the remaining period of the plan. Refer to Note 15 for additional information.
Reclassification out of Accumulated Other Comprehensive Income	The following tables summarize the reclassifications out of accumulated other comprehensive income (“AOCI”) for the periods indicated: Details about accumulated other comprehensive income components Amount reclassified from Affected line item in the Three Months Ended September 30, 2021 2020 Foreign currency translation adjustment $ (0.8) $ — (1) 0.5 — (1) $ (0.3) $ — Net of tax Net unrealized (gains) losses on investments $ (789.6) $ 1.8 Net realized gains (losses) on investments (1) 171.1 (0.3) Provision for income taxes (1) $ (618.5) $ 1.5 Net of tax Net unrealized gains on derivative transactions $ (0.7) $ (0.7) Interest expense 0.1 0.1 Provision for income taxes $ (0.6) $ (0.6) Net of tax Amortization of pension and postretirement unrecognized net periodic benefit cost: Amortization of net loss $ 1.8 $ 1.3 (2) Amortization of prior service credit (3.4) (3.4) (2) Settlement loss 0.3 — (2) (1.3) (2.1) 0.3 0.4 Provision for income taxes $ (1.0) $ (1.7) Net of tax Total reclassifications for the period $ (620.4) $ (0.8) Net of tax Details about accumulated other comprehensive income components Amount reclassified from Affected line item in the Nine Months Ended September 30, 2021 2020 Foreign currency translation adjustment $ (0.8) $ 38.4 Underwriting, general and administrative expenses (1) 0.5 — Provision for income taxes (1) $ (0.3) $ 38.4 Net of tax Net unrealized gains on investments $ (796.1) $ (1.6) Net realized gains (losses) on investments (1) 172.4 0.4 Provision for income taxes (1) $ (623.7) $ (1.2) Net of tax Net unrealized gains on derivative transactions $ (2.1) $ (2.1) Interest expense 0.3 0.3 Provision for income taxes $ (1.8) $ (1.8) Net of tax Amortization of pension and postretirement unrecognized net periodic benefit cost: Amortization of net loss $ 5.4 $ 3.8 (2) Amortization of prior service credit (10.2) (7.9) (2) Settlement loss 0.3 — (2) (4.5) (4.1) 0.9 0.8 Provision for income taxes $ (3.6) $ (3.3) Net of tax Total reclassifications for the period $ (629.4) $ 32.1 Net of tax (1) Three and nine months ended September 30, 2021 include $0.3 million after-tax ($0.8 million pre-tax) of foreign currency translation adjustments and $605.7 million after-tax ($773.4 million pre-tax) of net unrealized gains on investments, for a total of $606.0 million after-tax ($774.2 million pre-tax) that were recognized through income from discontinued operations upon the sale of the disposed Global Preneed business. Refer to Note 4 for additional information. (2) These AOCI components are included in the computation of net periodic pension cost. See Note 15 for additional information.

Stock Based Compensation (Table

Stock Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2021
Share-based Payment Arrangement [Abstract]
Summary of Stock Based Compensation Activity	The following table shows a summary of RSU activity during the three and nine months ended September 30, 2021 and 2020: Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 RSU compensation expense $ 8.8 $ 7.2 $ 23.5 $ 20.8 Income tax benefit (1.5) (1.4) (4.2) (3.8) RSU compensation expense, net of tax $ 7.3 $ 5.8 $ 19.3 $ 17.0 RSUs granted 18,590 32,844 216,983 294,794 Weighted average grant date fair value per unit $ 156.85 $ 101.81 $ 140.60 $ 92.20 Total fair value of vested RSUs $ 9.7 $ 4.8 $ 42.0 $ 29.2 The following table shows a summary of PSU activity during the three and nine months ended September 30, 2021 and 2020: Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 PSU compensation expense $ 8.9 $ 7.6 $ 23.7 $ 19.7 Income tax benefit (1.1) (0.8) (2.9) (2.1) PSU compensation expense, net of tax $ 7.8 $ 6.8 $ 20.8 $ 17.6 PSUs granted — — 208,040 302,274 Weighted average grant date fair value per unit $ — $ — $ 148.04 $ 87.36 Total fair value of vested PSUs $ 2.1 $ 0.3 $ 24.6 $ 24.7

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
Net Income, Weighted Average Common Shares Used in Calculating Basic Earnings Per Common Share and Diluted EPS	The following table presents net income, the weighted average common shares used in calculating basic EPS and those used in calculating diluted EPS for each period presented below. Diluted EPS reflects the incremental common shares from: (1) common shares issuable upon vesting of PSUs and the purchase of shares under the Employee Stock Purchase Plan (the “ESPP”) using the treasury stock method; and (2) common shares issuable upon the conversion of the MCPS using the if-converted method. Refer to Notes 12 and 13 for further information regarding potential common stock issuances. The outstanding RSUs have non-forfeitable rights to dividend equivalents and are therefore included in calculating basic and diluted EPS under the two-class method. Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Numerator Net income from continuing operations $ 153.6 $ 88.0 $ 486.8 $ 401.3 Less: Net loss (income) attributable to non-controlling interest — 0.3 — (1.1) Net income from continuing operations attributable to stockholders 153.6 88.3 486.8 400.2 Less: Preferred stock dividends — (4.7) (4.7) (14.0) Net income from continuing operations attributable to common stockholders 153.6 83.6 482.1 386.2 Less: Common stock dividends paid (38.5) (37.5) (118.5) (115.1) Undistributed earnings $ 115.1 $ 46.1 $ 363.6 $ 271.1 Net income from continuing operations attributable to common stockholders $ 153.6 $ 83.6 $ 482.1 $ 386.2 Add: Net income (loss) from discontinued operations 728.8 (118.5) 762.0 (97.6) Net income (loss) attributable to common stockholders $ 882.4 $ (34.9) $ 1,244.1 $ 288.6 Denominator Weighted average common shares outstanding used in basic per common share calculations 59,126,313 60,190,103 59,769,690 60,384,817 Incremental common shares from: PSUs 352,918 233,039 371,793 253,982 ESPP 233 2,580 — 2,146 MCPS — — 713,838 2,699,913 Weighted average common shares outstanding used in diluted per common share calculations 59,479,464 60,425,722 60,855,321 63,340,858 Earnings per common share - Basic Distributed earnings $ 0.65 $ 0.62 $ 1.98 $ 1.91 Undistributed earnings 1.95 0.77 6.09 4.48 Net income from continuing operations 2.60 1.39 8.07 6.39 Net income (loss) from discontinued operations 12.32 (1.97) 12.74 (1.61) Net income (loss) attributable to common stockholders $ 14.92 $ (0.58) $ 20.81 $ 4.78 Earnings per common share - Diluted Distributed earnings $ 0.65 $ 0.62 $ 1.95 $ 1.82 Undistributed earnings 1.93 0.76 6.05 4.50 Net income from continuing operations 2.58 1.38 8.00 6.32 Net income (loss) from discontinued operations 12.25 (1.96) 12.52 (1.54) Net income (loss) attributable to common stockholders $ 14.83 $ (0.58) $ 20.52 $ 4.78

Retirement and Other Employee_2

Retirement and Other Employee Benefits (Tables)	9 Months Ended
	Sep. 30, 2021
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
Components of Net Periodic Benefit Cost	The following tables present the components of net periodic benefit cost for the Plans for the three and nine months ended September 30, 2021 and 2020: Qualified Pension Benefits Unfunded Non-qualified Retirement Health For the Three Months Ended September 30, For the Three Months Ended September 30, For the Three Months Ended September 30, 2021 2020 2021 2020 2021 2020 Interest cost $ 3.5 $ 5.1 $ 0.3 $ 0.5 $ 0.1 $ 0.1 Expected return on plan assets (6.8) (7.7) — — (0.4) (0.8) Amortization of prior service credit — — — — (3.4) (3.4) Amortization of net loss (gain) 1.2 0.7 0.8 0.6 (0.2) — Settlement loss — — 0.3 — — — Net periodic benefit cost $ (2.1) $ (1.9) $ 1.4 $ 1.1 $ (3.9) $ (4.1) Qualified Pension Benefits Unfunded Nonqualified Retirement Health For the Nine Months Ended September 30, For the Nine Months Ended September 30, For the Nine Months Ended September 30, 2021 2020 2021 2020 2021 2020 Interest cost $ 10.5 $ 15.3 $ 0.9 $ 1.5 $ 0.1 $ 0.6 Expected return on plan assets (20.6) (23.1) — — (1.2) (1.3) Amortization of prior service credit — — — — (10.2) (7.9) Amortization of net loss (gain) 3.6 2.1 2.4 1.7 (0.4) — Settlement loss — — 0.3 — — — Net periodic benefit cost $ (6.5) $ (5.7) $ 3.6 $ 3.2 $ (11.7) $ (8.6)

Nature of Operations (Details)

Nature of Operations (Details)	9 Months Ended
	Sep. 30, 2021segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of operating segments	2

Business Held for Sale and Di_3

Business Held for Sale and Discontinued Operations - Narrative (Details) - Global Preneed - Discontinued Operations, Held-for-sale $ in Millions	Aug. 02, 2021USD ($)	Sep. 30, 2021USD ($)	Aug. 01, 2021	Sep. 30, 2021USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale of discontinued operation, aggregated sale price	$ 1,350
Sale of discontinued operation, base sale price	$ 1,250
Accrued interest rate on base purchase price			0.06
Post closing purchase price adjustment period	120 days
Transaction costs	$ 37.7
Cash consideration	$ 1,310
Net gain on the sale				$ 723.2
Gain on disposition of business, recognized from AOCI, net of tax		$ 606		$ 606

Business Held for Sale and Di_4

Business Held for Sale and Discontinued Operations - Schedule of Balance Sheet (Details) - USD ($) $ in Millions	Sep. 30, 2021	Aug. 02, 2021	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2019
Investments:
Fixed maturity securities, fair value	$ 7,650.3		$ 6,815.5
Equity securities at fair value	422.3		290.2
Commercial mortgage loans on real estate, at amortized cost	227.3		138.3
Short-term investments	217.5		292
Other investments	679.2		686.8
Total investments	9,196.6		8,222.8
Cash and cash equivalents	2,027.9		2,207.6	$ 2,189.3
Premiums and accounts receivable	1,702.4		1,548.9
Reinsurance recoverables	7,135.4		6,605.4
Accrued investment income	63.6		67
Deferred acquisition costs	8,548.2		7,388
Property and equipment, net	529		446.1
Value of business acquired	698.6		1,152.2
Other assets	493.3		496.2
Assets held in separate accounts	11.5		11.5
Total assets held for sale	33,624.8		44,649.9
Liabilities
Future policy benefits and expenses	1,334.1		1,358.5
Unearned premiums	18,457.2		17,293.1
Claims and benefits payable	1,897.4		1,610.3	$ 1,738.9	$ 1,613.1
Commissions payable	664.6		699.1
Reinsurance balances payable	389.3		359.3
Accounts payable and other liabilities	2,574.4		2,640.5
Liabilities related to separate accounts	11.5		11.5
Total liabilities held for sale	$ 27,880.4		38,695.1
Global Preneed | Discontinued Operations, Held-for-sale
Investments:
Fixed maturity securities, fair value		$ 6,761	6,633.5
Equity securities at fair value		112.6	113.9
Commercial mortgage loans on real estate, at amortized cost		599	616
Short-term investments		58.7	41.2
Other investments		14.8	52
Total investments		7,546.1	7,456.6
Cash and cash equivalents		27.3	21
Premiums and accounts receivable		4.2	7.5
Reinsurance recoverables		3,235.4	3,234.5
Accrued investment income		66.8	62.7
Deferred acquisition costs		334	185.5
Property and equipment, net		49.3	47.2
Value of business acquired		3.9	4.3
Other assets		20.8	22.6
Assets held in separate accounts		2,322.1	2,176.8
Total assets held for sale		13,609.9	13,218.7
Liabilities
Future policy benefits and expenses		8,921.8	8,703.5
Unearned premiums		36.6	14.9
Claims and benefits payable		1,024.2	1,049.2
Commissions payable		10.6	9.4
Reinsurance balances payable		4.1	3.1
Accounts payable and other liabilities		127.2	154.4
Liabilities related to separate accounts		2,322.1	2,176.8
Total liabilities held for sale		$ 12,446.6	$ 12,111.3

Business Held for Sale and Di_5

Business Held for Sale and Discontinued Operations - Schedule of Income (Loss) from Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues
Net earned premiums	$ 2,140.1	$ 2,086.8	$ 6,396.3	$ 6,173.6
Fees and other income	309.6	209.4	858	829.4
Net investment income	76	63.3	235.2	212.3
Net realized gains (losses) on investments	112.1	17.2	123.2	(37.9)
Total revenues	2,637.8	2,376.7	7,612.7	7,177.4
Benefits, losses and expenses
Policyholder benefits	614.2	638.5	1,681.2	1,697.3
Amortization of deferred acquisition costs and value of business acquired	965.6	927.3	2,903.7	2,689.6
Underwriting, general and administrative expenses	818.3	672.9	2,301.2	2,290.9
Total benefits, losses and expenses	2,446.3	2,264.2	6,991.5	6,755.5
Net income (loss) from discontinued operations (Note 4)	728.8	(118.5)	762	(97.6)
Global Preneed | Discontinued Operations, Held-for-sale
Revenues
Net earned premiums	6.1	16	42.6	49.4
Fees and other income	13.6	38.6	91	113.6
Net investment income	23.7	71.8	168.4	216
Net realized gains (losses) on investments	0.5	(0.6)	4.2	(16.7)
Gain on disposal of businesses	926.4	0	920.1	0
Total revenues	970.3	125.8	1,226.3	362.3
Benefits, losses and expenses
Policyholder benefits	24.6	71.1	172.7	211.6
Amortization of deferred acquisition costs and value of business acquired	7.1	18.9	46.2	56.1
Underwriting, general and administrative expenses	5.7	14.6	39	46.8
Goodwill impairment	0	137.8	0	137.8
Total benefits, losses and expenses	37.4	242.4	257.9	452.3
Income (loss) from discontinued operations before income taxes	932.9	(116.6)	968.4	(90)
Provision for income taxes	204.1	1.9	206.4	7.6
Net income (loss) from discontinued operations (Note 4)	728.8	$ (118.5)	762	$ (97.6)
Pre-tax AOCI recognized in earning upon sale	774.2		774.2
Reclassification from AOCI, tax	$ 168.2		$ 168.2

Segment Information - Financial

Segment Information - Financial Information by Segment (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021USD ($)	Sep. 30, 2020USD ($)	Sep. 30, 2021USD ($)segment	Sep. 30, 2020USD ($)	Dec. 31, 2020USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment			3
Revenues
Net earned premiums	$ 2,140.1	$ 2,086.8	$ 6,396.3	$ 6,173.6
Fees and other income	309.6	209.4	858	829.4
Net investment income	76	63.3	235.2	212.3
Net realized gains (losses) on investments	112.1	17.2	123.2	(37.9)
Total revenues	2,637.8	2,376.7	7,612.7	7,177.4
Benefits, losses and expenses
Policyholder benefits	614.2	638.5	1,681.2	1,697.3
Amortization of deferred acquisition costs and value of business acquired	965.6	927.3	2,903.7	2,689.6
Underwriting, general and administrative expenses	818.3	672.9	2,301.2	2,290.9
Interest expense	27.5	25.5	84.7	77.7
Loss on extinguishment of debt (Note 10)	20.7	0	20.7	0
Total benefits, losses and expenses	2,446.3	2,264.2	6,991.5	6,755.5
Segment income (loss) from continuing operations before provision (benefit) for income taxes	191.5	112.5	621.2	421.9
Provision (benefit) for income taxes	37.9	24.5	134.4	20.6
Net income from continuing operations	153.6	88	486.8	401.3
Net income (loss) from discontinued operations	728.8	(118.5)	762	(97.6)
Net income (loss)	882.4	(30.5)	1,248.8	303.7
Less: Net loss (income) attributable to non-controlling interests	0	0.3	0	(1.1)
Net income (loss) attributable to stockholders	882.4	(30.2)	1,248.8	302.6
Less: Preferred stock dividends	0	(4.7)	(4.7)	(14)
Net income (loss) attributable to common stockholders	882.4	(34.9)	1,244.1	288.6
Net income (loss) attributable to common stockholders	882.4	(34.9)	1,244.1	288.6
Segment assets	33,624.8		33,624.8		$ 44,649.9
Global Lifestyle
Revenues
Net earned premiums	1,688.5	1,633.2	5,014.6	4,799
Fees and other income	274.5	171.8	748.5	721.6
Net investment income	48.5	44.6	148.7	143.5
Net realized gains (losses) on investments	0	0	0	0
Total revenues	2,011.5	1,849.6	5,911.8	5,664.1
Benefits, losses and expenses
Policyholder benefits	335.1	365.4	1,007.3	1,044.7
Amortization of deferred acquisition costs and value of business acquired	910	870.5	2,731.8	2,519.7
Underwriting, general and administrative expenses	614.6	480.8	1,690	1,649.4
Interest expense	0	0	0	0
Loss on extinguishment of debt (Note 10)	0		0
Total benefits, losses and expenses	1,859.7	1,716.7	5,429.1	5,213.8
Segment income (loss) from continuing operations before provision (benefit) for income taxes	151.8	132.9	482.7	450.3
Provision (benefit) for income taxes	27.8	26.3	105.8	101
Net income from continuing operations	124	106.6	376.9	349.3
Segment assets	25,425.3		25,425.3
Global Housing
Revenues
Net earned premiums	451.6	453.6	1,381.7	1,374.6
Fees and other income	35.1	37.7	109.1	106
Net investment income	20.2	16.5	63.3	54.9
Net realized gains (losses) on investments	0	0	0	0
Total revenues	506.9	507.8	1,554.1	1,535.5
Benefits, losses and expenses
Policyholder benefits	279.1	272.8	673.9	651.9
Amortization of deferred acquisition costs and value of business acquired	55.6	56.8	171.9	169.9
Underwriting, general and administrative expenses	169.5	162.2	501.3	496.6
Interest expense	0	0	0	0
Loss on extinguishment of debt (Note 10)	0		0
Total benefits, losses and expenses	504.2	491.8	1,347.1	1,318.4
Segment income (loss) from continuing operations before provision (benefit) for income taxes	2.7	16	207	217.1
Provision (benefit) for income taxes	(0.5)	2.9	42.7	44.4
Net income from continuing operations	3.2	13.1	164.3	172.7
Segment assets	4,285.2		4,285.2
Corporate and Other
Revenues
Net earned premiums	0	0	0	0
Fees and other income	0	(0.1)	0.4	1.8
Net investment income	7.3	2.2	23.2	13.9
Net realized gains (losses) on investments	112.1	17.2	123.2	(37.9)
Total revenues	119.4	19.3	146.8	(22.2)
Benefits, losses and expenses
Policyholder benefits	0	0.3	0	0.7
Amortization of deferred acquisition costs and value of business acquired	0	0	0	0
Underwriting, general and administrative expenses	34.2	29.9	109.9	144.9
Interest expense	27.5	25.5	84.7	77.7
Loss on extinguishment of debt (Note 10)	20.7		20.7
Total benefits, losses and expenses	82.4	55.7	215.3	223.3
Segment income (loss) from continuing operations before provision (benefit) for income taxes	37	(36.4)	(68.5)	(245.5)
Provision (benefit) for income taxes	10.6	(4.7)	(14.1)	(124.8)
Net income from continuing operations	26.4	$ (31.7)	(54.4)	$ (120.7)
Segment assets	$ 3,914.3		$ 3,914.3

Contract Revenues - Narrative (

Contract Revenues - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Global Lifestyle
Disaggregation of Revenue [Line Items]
Disaggregated fee revenues	$ 264	$ 124.6	$ 730.1	$ 579.3
Global Housing
Disaggregation of Revenue [Line Items]
Disaggregated fee revenues	22.4	25.3	71.8	71.1
Service contracts and sales
Disaggregation of Revenue [Line Items]
Receivables from contracts with customers	248.9		248.9		$ 257.9
Unearned revenue from contracts with customers	148.9		148.9		89.8
Contract with customer, liability, unearned revenue	12.5	$ 10.3	47.6	$ 37.5
Deferred upfront commissions and other costs	$ 6.6		$ 6.6		$ 13.8

Investments - Amortized Cost, G

Investments - Amortized Cost, Gross Unrealized Gains and Losses, Fair Value and OTTI (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities available for sale, amortized cost	$ 7,271.3
Fixed maturity securities, fair value	7,650.3	$ 6,815.5
Fixed maturity securities
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities available for sale, amortized cost	7,271.3	6,245.8
Fixed maturity securities available for sale, allowances for credit losses	0	(1.2)
Fixed maturity securities, gross unrealized gains	405.4	578.2
Fixed maturity securities, gross unrealized losses	(26.4)	(7.3)
Fixed maturity securities, fair value	7,650.3	6,815.5
Fixed maturity securities | U.S. government and government agencies and authorities
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities available for sale, amortized cost	88.3	90.4
Fixed maturity securities available for sale, allowances for credit losses	0	0
Fixed maturity securities, gross unrealized gains	2.6	3.7
Fixed maturity securities, gross unrealized losses	(0.2)	0
Fixed maturity securities, fair value	90.7	94.1
Fixed maturity securities | States, municipalities and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities available for sale, amortized cost	138.3	164.4
Fixed maturity securities available for sale, allowances for credit losses	0	0
Fixed maturity securities, gross unrealized gains	7.6	11
Fixed maturity securities, gross unrealized losses	(0.6)	(0.1)
Fixed maturity securities, fair value	145.3	175.3
Fixed maturity securities | Foreign governments
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities available for sale, amortized cost	418.3	442.4
Fixed maturity securities available for sale, allowances for credit losses	0	0
Fixed maturity securities, gross unrealized gains	7.9	27.4
Fixed maturity securities, gross unrealized losses	(2.3)	(0.1)
Fixed maturity securities, fair value	423.9	469.7
Fixed maturity securities | Asset-backed
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities available for sale, amortized cost	541.3	251.9
Fixed maturity securities available for sale, allowances for credit losses	0	0
Fixed maturity securities, gross unrealized gains	14.6	9.4
Fixed maturity securities, gross unrealized losses	(0.9)	(0.8)
Fixed maturity securities, fair value	555	260.5
Fixed maturity securities | Commercial mortgage-backed
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities available for sale, amortized cost	468.2	266.3
Fixed maturity securities available for sale, allowances for credit losses	0	0
Fixed maturity securities, gross unrealized gains	13.7	16.5
Fixed maturity securities, gross unrealized losses	(2)	(1.4)
Fixed maturity securities, fair value	479.9	281.4
Fixed maturity securities | Residential mortgage-backed
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities available for sale, amortized cost	620.7	685.8
Fixed maturity securities available for sale, allowances for credit losses	0	0
Fixed maturity securities, gross unrealized gains	32.8	49
Fixed maturity securities, gross unrealized losses	(0.8)	(0.2)
Fixed maturity securities, fair value	652.7	734.6
Fixed maturity securities | U.S. corporate
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities available for sale, amortized cost	3,706.9	3,315.6
Fixed maturity securities available for sale, allowances for credit losses	0	(1.2)
Fixed maturity securities, gross unrealized gains	271	380.6
Fixed maturity securities, gross unrealized losses	(12.5)	(4.4)
Fixed maturity securities, fair value	3,965.4	3,690.6
Fixed maturity securities | Foreign corporate
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities available for sale, amortized cost	1,289.3	1,029
Fixed maturity securities available for sale, allowances for credit losses	0	0
Fixed maturity securities, gross unrealized gains	55.2	80.6
Fixed maturity securities, gross unrealized losses	(7.1)	(0.3)
Fixed maturity securities, fair value	$ 1,337.4	$ 1,109.3

Investments - Narrative (Detail

Investments - Narrative (Details) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2021USD ($)investmentstate	Dec. 31, 2020USD ($)stateinvestment
Investment [Line Items]
Investment in securities	$ 7,650.3	$ 6,815.5
Percentage of securities representing gross unrealized losses	1.00%	2.00%
Percentage of gross unrealized losses in a continuous loss position less than twelve months	92.00%	60.00%
Individual securities comprising total gross unrealized losses | investment	909	180
Percentage of residential mortgage-backed holdings exposure to sub-prime mortgage collateral	43.00%
Minimum
Investment [Line Items]
Total	$ 0.1	$ 0.1
Maximum
Investment [Line Items]
Total	$ 9.7	$ 9.9
States, municipalities and political subdivisions
Investment [Line Items]
Number of individual states exceeding overall investment portfolio exposure | state	0	0
Maximum individual state exposure	0.30%	0.40%
Advance refunded or escrowed-to-maturity securities	$ 20.3	$ 39.6
Percentage of revenue securities	53.00%	60.00%
Europe | Corporate Fixed Maturity and Equity Securities
Investment [Line Items]
Investment in securities	$ 735.7	$ 589.5
Unrealized gain (loss) on investments	$ 25.9	$ 41.8
Geographic Concentration Risk | Investments | Brazil | Foreign Government Fixed Maturity Securities
Investment [Line Items]
Percentage of investments held	26.00%	26.00%
Geographic Concentration Risk | Investments | Canada | Foreign Government Fixed Maturity Securities
Investment [Line Items]
Percentage of investments held	25.00%	24.00%
Geographic Concentration Risk | Investments | Mexico | Foreign Government Fixed Maturity Securities
Investment [Line Items]
Percentage of investments held	14.00%	16.00%
Geographic Concentration Risk | Investments | United Kingdom | Corporate Fixed Maturity and Equity Securities
Investment [Line Items]
Percentage of investments held	5.00%	6.00%
Geographic Concentration Risk | Investments | Other Countries | Foreign Government Fixed Maturity Securities
Investment [Line Items]
Percentage of investments held	9.00%	8.00%
Financial Services Sector | Investment Sector Concentration Risk | Investments | Europe | Corporate Fixed Maturity and Equity Securities
Investment [Line Items]
Percentage of investments held	37.00%	29.00%
Fixed maturity securities
Investment [Line Items]
Investment in securities	$ 7,650.3	$ 6,815.5
Fixed maturity securities, gross unrealized losses	26.4	7.3
Fixed maturity securities, gross unrealized gains	405.4	578.2
Fixed maturity securities | States, municipalities and political subdivisions
Investment [Line Items]
Investment in securities	145.3	175.3
Fixed maturity securities, gross unrealized losses	0.6	0.1
Fixed maturity securities, gross unrealized gains	7.6	11
Fixed maturity securities | Energy Sector | Corporate debt securities
Investment [Line Items]
Investment in securities	352.8	319.4
Fixed maturity securities, gross unrealized losses	$ 22.5
Fixed maturity securities, gross unrealized gains		$ 23
Internal Investment Grade | Fixed maturity securities | Energy Sector | Corporate debt securities
Investment [Line Items]
Percentage of energy exposure	0.85	0.81

Investments - Amortized Cost an

Investments - Amortized Cost and Fair Value of Fixed Maturity Securities by Contractual Maturity (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Cost or Amortized Cost
Due in one year or less, cost or amortized cost	$ 366.7
Due after one year through five years, cost or amortized cost	2,423
Due after five years through ten years, cost or amortized cost	1,877.8
Due after ten years, cost or amortized cost	973.6
Total, cost or amortized cost	5,641.1
Fixed maturity securities, cost or amortized cost	7,271.3
Fair Value
Due in one year or less, fair value	371.4
Due after one year through five years, fair value	2,533.9
Due after five years through ten years, fair value	1,998.1
Due after ten years, fair value	1,059.3
Total, fair value	5,962.7
Fixed maturity securities, fair value	7,650.3	$ 6,815.5
Commercial mortgage-backed
Cost or Amortized Cost
Cost or amortized cost	468.2
Fair Value
Fair value	479.9
Residential mortgage-backed
Cost or Amortized Cost
Cost or amortized cost	620.7
Fair Value
Fair value	652.7
Asset-backed
Cost or Amortized Cost
Cost or amortized cost	541.3
Fair Value
Fair value	$ 555

Investments - Net Realized Gain

Investments - Net Realized Gains (Losses), Including Impairment, Recognized in the Consolidated Statements of Operations (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Net realized gains (losses) related to sales and other:
Net realized gains (losses) on investments	$ 112.1		$ 18.5	$ 123	$ (23.9)
Net realized gains (losses) related to impairments:
Net realized losses related to impairments	0		(1.3)	0.2	(14)
Other investments	0		0	(1)	(11.4)
Total net realized gains (losses)	112.1		17.2	123.2	(37.9)
Gains on equity investment holdings accounted for under alternative measurement	23		0	25.1	2.2
Equity securities, carry value adjustment upwards	46		26.8	46	26.8
Cumulative impairment of equity investment	19.6		12.8	19.6	12.8
Equity securities at fair value	422.3			422.3		$ 290.2
Three Equity Positions that Went Public
Net realized gains (losses) related to impairments:
Equity securities, unrealized gain	74.6			74.6
Equity securities at fair value	107.1			107.1
Fixed maturity securities
Net realized gains (losses) related to sales and other:
Net realized gains (losses) on investments	16.1		0.6	19.3	6.4
Net realized gains (losses) related to impairments:
Net realized losses related to impairments	0		(1.3)	1.2	(2.6)
Fixed maturity securities available for sale, allowances for credit losses	0			0		1.2
Elimination of allowance for credit losses		$ 1.2
Equity securities
Net realized gains (losses) related to sales and other:
Net realized gains (losses) on investments	95.1		12.6	100.6	(6.6)
Net realized gains (losses) related to impairments:
Equity investment holdings accounted for under the measurement alternative	112		96.5	112	96.5
Commercial mortgage loans on real estate
Net realized gains (losses) related to sales and other:
Net realized gains (losses) on investments	0.5		(0.6)	0.7	(0.7)
Other investments
Net realized gains (losses) related to sales and other:
Net realized gains (losses) on investments	0.4		5.9	2.4	9.3
Net realized gains (losses) related to impairments:
Other investments	0		0	(1)	(11.4)
Other investments | Three Equity Positions that Went Public
Net realized gains (losses) related to impairments:
Equity securities at fair value						$ 31.6
Consolidated investment entities
Net realized gains (losses) related to sales and other:
Net realized gains (losses) on investments	$ 0		$ 0	$ 0	$ (32.3)

Investments - Unrealized Gains

Investments - Unrealized Gains on Equity Securities (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Investments, Debt and Equity Securities [Abstract]
Net gains (losses) recognized on equity securities	$ 95.1	$ 12.6	$ 100.6	$ (6.6)
Less: Net realized gains related to sales of equity securities	1.1	(0.1)	2.1	0.9
Total net unrealized gains (losses) on equity securities held	$ 94	$ 12.7	$ 98.5	$ (7.5)

Investments - Investment Catego

Investments - Investment Category and Duration of Gross Unrealized Losses on Fixed Maturity Securities and Equity Securities (Details) - Fixed maturity securities - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities, less than 12 months, fair value	$ 1,733.3	$ 243
Fixed maturity securities, less than 12 months, unrealized losses	(24.4)	(4.4)
Fixed maturity securities, 12 months or more, fair value	35.6	56
Fixed maturity securities, 12 months or more, unrealized losses	(2)	(2.9)
Fixed maturity securities, total, fair value	1,768.9	299
Fixed maturity securities, unrealized losses	(26.4)	(7.3)
U.S. government and government agencies and authorities
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities, less than 12 months, fair value	17.8
Fixed maturity securities, less than 12 months, unrealized losses	(0.2)
Fixed maturity securities, 12 months or more, fair value	0
Fixed maturity securities, 12 months or more, unrealized losses	0
Fixed maturity securities, total, fair value	17.8
Fixed maturity securities, unrealized losses	(0.2)
States, municipalities and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities, less than 12 months, fair value	38.5	6.1
Fixed maturity securities, less than 12 months, unrealized losses	(0.6)	(0.1)
Fixed maturity securities, 12 months or more, fair value	0	0
Fixed maturity securities, 12 months or more, unrealized losses	0	0
Fixed maturity securities, total, fair value	38.5	6.1
Fixed maturity securities, unrealized losses	(0.6)	(0.1)
Foreign governments
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities, less than 12 months, fair value	107.1	28.3
Fixed maturity securities, less than 12 months, unrealized losses	(2.3)	(0.1)
Fixed maturity securities, 12 months or more, fair value	0	0
Fixed maturity securities, 12 months or more, unrealized losses	0	0
Fixed maturity securities, total, fair value	107.1	28.3
Fixed maturity securities, unrealized losses	(2.3)	(0.1)
Asset-backed
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities, less than 12 months, fair value	228.9	54.5
Fixed maturity securities, less than 12 months, unrealized losses	(0.8)	(0.2)
Fixed maturity securities, 12 months or more, fair value	8.1	37.4
Fixed maturity securities, 12 months or more, unrealized losses	(0.1)	(0.6)
Fixed maturity securities, total, fair value	237	91.9
Fixed maturity securities, unrealized losses	(0.9)	(0.8)
Commercial mortgage-backed
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities, less than 12 months, fair value	156	28.2
Fixed maturity securities, less than 12 months, unrealized losses	(1.5)	(0.7)
Fixed maturity securities, 12 months or more, fair value	1.8	3.3
Fixed maturity securities, 12 months or more, unrealized losses	(0.5)	(0.7)
Fixed maturity securities, total, fair value	157.8	31.5
Fixed maturity securities, unrealized losses	(2)	(1.4)
Residential mortgage-backed
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities, less than 12 months, fair value	66.1	23.9
Fixed maturity securities, less than 12 months, unrealized losses	(0.7)	(0.1)
Fixed maturity securities, 12 months or more, fair value	9.5	1.5
Fixed maturity securities, 12 months or more, unrealized losses	(0.1)	(0.1)
Fixed maturity securities, total, fair value	75.6	25.4
Fixed maturity securities, unrealized losses	(0.8)	(0.2)
U.S. corporate
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities, less than 12 months, fair value	704.3	71.9
Fixed maturity securities, less than 12 months, unrealized losses	(11.3)	(2.9)
Fixed maturity securities, 12 months or more, fair value	14.5	13.8
Fixed maturity securities, 12 months or more, unrealized losses	(1.2)	(1.5)
Fixed maturity securities, total, fair value	718.8	85.7
Fixed maturity securities, unrealized losses	(12.5)	(4.4)
Foreign corporate
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities, less than 12 months, fair value	414.6	30.1
Fixed maturity securities, less than 12 months, unrealized losses	(7)	(0.3)
Fixed maturity securities, 12 months or more, fair value	1.7	0
Fixed maturity securities, 12 months or more, unrealized losses	(0.1)	0
Fixed maturity securities, total, fair value	416.3	30.1
Fixed maturity securities, unrealized losses	$ (7.1)	$ (0.3)

Investments - Credit Quality In

Investments - Credit Quality Indicators (Details) - Commercial Portfolio Segment $ in Millions	Sep. 30, 2021USD ($)	Dec. 31, 2020USD ($)
Greater than 2.0
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated current year	$ 42.2	$ 5.5
Financing receivable, originated year one	5.6	0
Financing receivable, originated year two	0	0
Financing receivable, originated year three	0	4.1
Financing receivable, originated year four	4	26.4
Prior	77.3	53.3
Financing receivable, before allowance for credit loss	$ 129.1	$ 89.3
Percentage of financing receivable, before allowance for credit loss	0.565	0.639
1.5 to 2.0
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated current year	$ 19.9	$ 0
Financing receivable, originated year one	0	0
Financing receivable, originated year two	0	4.8
Financing receivable, originated year three	4.7	0
Financing receivable, originated year four	0	2.6
Prior	17.1	17.5
Financing receivable, before allowance for credit loss	$ 41.7	$ 24.9
Percentage of financing receivable, before allowance for credit loss	0.183	0.178
1.0 to 1.5
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated current year	$ 33.4	$ 0
Financing receivable, originated year one	0	0
Financing receivable, originated year two	0	0
Financing receivable, originated year three	0	0
Financing receivable, originated year four	0	0
Prior	13.8	15
Financing receivable, before allowance for credit loss	$ 47.2	$ 15
Percentage of financing receivable, before allowance for credit loss	0.207	0.107
Less than 1.0
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated current year	$ 0	$ 0
Financing receivable, originated year one	0	0
Financing receivable, originated year two	0	0
Financing receivable, originated year three	0	6
Financing receivable, originated year four	5.9	0
Prior	4.3	4.7
Financing receivable, before allowance for credit loss	$ 10.2	$ 10.7
Percentage of financing receivable, before allowance for credit loss	0.045	0.076
Total
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated current year	$ 95.5	$ 5.5
Financing receivable, originated year one	5.6	0
Financing receivable, originated year two	0	4.8
Financing receivable, originated year three	4.7	10.1
Financing receivable, originated year four	9.9	29
Prior	112.5	90.5
Financing receivable, before allowance for credit loss	$ 228.2	$ 139.9
Percentage of financing receivable, before allowance for credit loss	1	1
70% and less
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated current year	$ 40.6	$ 2.9
Financing receivable, originated year one	2.9	0
Financing receivable, originated year two	0	0
Financing receivable, originated year three	0	4.1
Financing receivable, originated year four	4	29
Prior	109.3	87.1
Financing receivable, before allowance for credit loss	$ 156.8	$ 123.1
Percentage of financing receivable, before allowance for credit loss	0.687	0.880
71% to 80%
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated current year	$ 54.9	$ 2.6
Financing receivable, originated year one	2.7	0
Financing receivable, originated year two	0	4.8
Financing receivable, originated year three	4.7	0
Financing receivable, originated year four	0	0
Prior	0	0
Financing receivable, before allowance for credit loss	$ 62.3	$ 7.4
Percentage of financing receivable, before allowance for credit loss	0.273	0.053
81% to 95%
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated current year	$ 0	$ 0
Financing receivable, originated year one	0	0
Financing receivable, originated year two	0	0
Financing receivable, originated year three	0	0
Financing receivable, originated year four	0	0
Prior	3.2	2.2
Financing receivable, before allowance for credit loss	$ 3.2	$ 2.2
Percentage of financing receivable, before allowance for credit loss	0.014	0.016
Greater than 95%
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated current year	$ 0	$ 0
Financing receivable, originated year one	0	0
Financing receivable, originated year two	0	0
Financing receivable, originated year three	0	6
Financing receivable, originated year four	5.9	0
Prior	0	1.2
Financing receivable, before allowance for credit loss	$ 5.9	$ 7.2
Percentage of financing receivable, before allowance for credit loss	0.026	0.051
Total
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated current year	$ 95.5	$ 5.5
Financing receivable, originated year one	5.6	0
Financing receivable, originated year two	0	4.8
Financing receivable, originated year three	4.7	10.1
Financing receivable, originated year four	9.9	29
Prior	112.5	90.5
Financing receivable, before allowance for credit loss	$ 228.2	$ 139.9
Percentage of financing receivable, before allowance for credit loss	1	1

Fair Value Disclosures - Fair V

Fair Value Disclosures - Fair Value for Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Three Equity Positions that Went Public
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Acquired common stock in a merger	$ 107.1
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	9,791.7	$ 9,170.5
Other liabilities	72	76.1
Liabilities related to separate accounts	11.4	11.4
Total financial liabilities	83.4	87.5
Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	1,500.2	1,874.3
Other liabilities	69.2	72.9
Liabilities related to separate accounts	7.3	6.7
Total financial liabilities	76.5	79.6
Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	8,159.9	7,268.8
Other liabilities	0	0.5
Liabilities related to separate accounts	4.1	4.7
Total financial liabilities	4.1	5.2
Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	131.6	27.4
Other liabilities	2.8	2.7
Liabilities related to separate accounts	0	0
Total financial liabilities	2.8	2.7
Fair Value, Measurements, Recurring | U.S. government and government agencies and authorities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	90.7	94.1
Fair Value, Measurements, Recurring | U.S. government and government agencies and authorities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	0	0
Fair Value, Measurements, Recurring | U.S. government and government agencies and authorities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	90.7	94.1
Fair Value, Measurements, Recurring | U.S. government and government agencies and authorities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	0	0
Fair Value, Measurements, Recurring | States, municipalities and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	145.3	175.3
Fair Value, Measurements, Recurring | States, municipalities and political subdivisions | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	0	0
Fair Value, Measurements, Recurring | States, municipalities and political subdivisions | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	145.3	175.3
Fair Value, Measurements, Recurring | States, municipalities and political subdivisions | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	0	0
Fair Value, Measurements, Recurring | Foreign governments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	423.9	469.7
Fair Value, Measurements, Recurring | Foreign governments | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	0	0.5
Fair Value, Measurements, Recurring | Foreign governments | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	423.9	468.8
Fair Value, Measurements, Recurring | Foreign governments | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	0	0.4
Fair Value, Measurements, Recurring | Asset-backed
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	555	260.5
Fair Value, Measurements, Recurring | Asset-backed | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	0	0
Fair Value, Measurements, Recurring | Asset-backed | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	555	260.5
Fair Value, Measurements, Recurring | Asset-backed | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	0	0
Fair Value, Measurements, Recurring | Commercial mortgage-backed
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	479.9	281.4
Fair Value, Measurements, Recurring | Commercial mortgage-backed | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	0	0
Fair Value, Measurements, Recurring | Commercial mortgage-backed | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	472.8	272.7
Fair Value, Measurements, Recurring | Commercial mortgage-backed | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	7.1	8.7
Fair Value, Measurements, Recurring | Residential mortgage-backed
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	652.7	734.6
Fair Value, Measurements, Recurring | Residential mortgage-backed | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	0	0
Fair Value, Measurements, Recurring | Residential mortgage-backed | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	652.7	734.6
Fair Value, Measurements, Recurring | Residential mortgage-backed | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	0	0
Fair Value, Measurements, Recurring | U.S. corporate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	3,965.4	3,690.6
Fair Value, Measurements, Recurring | U.S. corporate | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	0	0
Fair Value, Measurements, Recurring | U.S. corporate | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	3,954.4	3,678.6
Fair Value, Measurements, Recurring | U.S. corporate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	11	12
Fair Value, Measurements, Recurring | Foreign corporate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	1,337.4	1,109.3
Fair Value, Measurements, Recurring | Foreign corporate | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	0	0
Fair Value, Measurements, Recurring | Foreign corporate | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	1,332.6	1,105.4
Fair Value, Measurements, Recurring | Foreign corporate | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	4.8	3.9
Fair Value, Measurements, Recurring | Mutual funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	37.7	42.3
Fair Value, Measurements, Recurring | Mutual funds | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	37.7	42.3
Fair Value, Measurements, Recurring | Mutual funds | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	0	0
Fair Value, Measurements, Recurring | Mutual funds | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	0	0
Fair Value, Measurements, Recurring | Common Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	123.5	15.2
Fair Value, Measurements, Recurring | Common Stock | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	14.2	13.3
Fair Value, Measurements, Recurring | Common Stock | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	0.7	0.7
Fair Value, Measurements, Recurring | Common Stock | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	108.6	1.2
Fair Value, Measurements, Recurring | Non-redeemable preferred stocks
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	261.1	232.7
Fair Value, Measurements, Recurring | Non-redeemable preferred stocks | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	0	0
Fair Value, Measurements, Recurring | Non-redeemable preferred stocks | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	261.1	231.6
Fair Value, Measurements, Recurring | Non-redeemable preferred stocks | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	0	1.1
Fair Value, Measurements, Recurring | Short-term investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	178.7	253.5
Fair Value, Measurements, Recurring | Short-term investments | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	160.9	202
Fair Value, Measurements, Recurring | Short-term investments | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	17.8	51.5
Fair Value, Measurements, Recurring | Short-term investments | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	0	0
Fair Value, Measurements, Recurring | Other investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	225.9	241.3
Fair Value, Measurements, Recurring | Other investments | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	69.2	72.9
Fair Value, Measurements, Recurring | Other investments | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	156.6	168.3
Fair Value, Measurements, Recurring | Other investments | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	0.1	0.1
Fair Value, Measurements, Recurring | Cash equivalents
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	1,302.8	1,558.6
Fair Value, Measurements, Recurring | Cash equivalents | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	1,210.9	1,536.6
Fair Value, Measurements, Recurring | Cash equivalents | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	91.9	22
Fair Value, Measurements, Recurring | Cash equivalents | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	0	0
Fair Value, Measurements, Recurring | Other assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	0.3
Fair Value, Measurements, Recurring | Other assets | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	0
Fair Value, Measurements, Recurring | Other assets | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	0.3
Fair Value, Measurements, Recurring | Other assets | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	0
Fair Value, Measurements, Recurring | Assets held in separate accounts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	11.4	11.4
Fair Value, Measurements, Recurring | Assets held in separate accounts | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	7.3	6.7
Fair Value, Measurements, Recurring | Assets held in separate accounts | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	4.1	4.7
Fair Value, Measurements, Recurring | Assets held in separate accounts | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets	$ 0	$ 0

Fair Value Disclosures - Carryi

Fair Value Disclosures - Carrying Value and Fair Value of the Financial Instruments that are Not Recognized or are Not Carried at Fair Value (Details) - Recurring - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total financial assets	$ 9,791.7	$ 9,170.5
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total financial assets	1,500.2	1,874.3
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total financial assets	8,159.9	7,268.8
Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total financial assets	131.6	27.4
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Commercial mortgage loans on real estate	227.3	138.3
Other investments	20.4	52.1
Other assets	22.2	23.3
Total financial assets	269.9	213.7
Policy reserves under investment products (Individual and group annuities, subject to discretionary withdrawal)	68.3	70.6
Funds withheld under reinsurance	350	358.6
Debt	2,201.9	2,252.9
Total financial liabilities	2,620.2	2,682.1
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Commercial mortgage loans on real estate	239.6	198.3
Other investments	20.4	52.1
Other assets	22.2	23.3
Total financial assets	282.2	273.7
Policy reserves under investment products (Individual and group annuities, subject to discretionary withdrawal)	80	85.4
Funds withheld under reinsurance	350	358.6
Debt	2,489.9	2,540
Total financial liabilities	2,919.9	2,984
Fair Value | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Commercial mortgage loans on real estate	0	0
Other investments	14	14.4
Other assets	0	0
Total financial assets	14	14.4
Policy reserves under investment products (Individual and group annuities, subject to discretionary withdrawal)	0	0
Funds withheld under reinsurance	350	358.6
Debt	0	0
Total financial liabilities	350	358.6
Fair Value | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Commercial mortgage loans on real estate	0	0
Other investments	0	0
Other assets	0	0
Total financial assets	0	0
Policy reserves under investment products (Individual and group annuities, subject to discretionary withdrawal)	0	0
Funds withheld under reinsurance	0	0
Debt	2,489.9	2,540
Total financial liabilities	2,489.9	2,540
Fair Value | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Commercial mortgage loans on real estate	239.6	198.3
Other investments	6.4	37.7
Other assets	22.2	23.3
Total financial assets	268.2	259.3
Policy reserves under investment products (Individual and group annuities, subject to discretionary withdrawal)	80	85.4
Funds withheld under reinsurance	0	0
Debt	0	0
Total financial liabilities	$ 80	$ 85.4

Reserves - Roll Forward of Clai

Reserves - Roll Forward of Claims and Benefits Payable (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Liability for Claims and Claims Adjustment Expense [Line Items]
Claims and benefits payable	$ 1,897.4	$ 1,738.9
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Claims and benefits payable, at beginning of period	1,610.3	1,613.1
Less: Reinsurance ceded and other	(849.4)	(855.1)
Net claims and benefits payable, at beginning of period	760.9	758
Incurred losses and loss adjustment expenses related to:
Current year	1,706.9	1,739.5
Prior years	(25.7)	(42.7)
Total incurred losses and loss adjustment expenses	1,681.2	1,696.8
Paid losses and loss adjustment expenses related to:
Current year	1,152	1,187.5
Prior years	447.7	434.5
Total paid losses and loss adjustment expenses	1,599.7	1,622
Net claims and benefits payable, at end of period	842.4	832.8
Plus: Reinsurance ceded and other	1,055	906.1
Claims and benefits payable, at end of period	1,897.4	1,738.9
Ceded to U.S. Government | Not Rated
Paid losses and loss adjustment expenses related to:
Reinsurance recoverables	$ 221.6	$ 118.4

Reserves - Narrative (Details)

Reserves - Narrative (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Liability for Claims and Claims Adjustment Expense [Line Items]
Favorable (unfavorable) prior year development	$ 25.7	$ 42.7
Global Lifestyle
Liability for Claims and Claims Adjustment Expense [Line Items]
Favorable (unfavorable) prior year development	34.1	34
Global Housing
Liability for Claims and Claims Adjustment Expense [Line Items]
Favorable (unfavorable) prior year development	(15.2)	2.9
Corporate and Other
Liability for Claims and Claims Adjustment Expense [Line Items]
Favorable (unfavorable) prior year development	$ 6.8	$ 5.8

Debt - Schedule of Debt (Detail

Debt - Schedule of Debt (Details) - USD ($)	9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Carrying Value	$ 2,201,900,000		$ 2,252,900,000
Senior Notes | Floating Rate Senior Notes due March 2021
Debt Instrument [Line Items]
Principal Amount	0		50,000,000
Carrying Value	$ 0		50,000,000
Senior Notes | Floating Rate Senior Notes due March 2021 | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Interest rate, basis spread	1.25%
Senior Notes | 4.20% Senior Notes due September 2023
Debt Instrument [Line Items]
Principal Amount	$ 0		350,000,000
Carrying Value	$ 0		348,900,000
Interest rate	4.00%
Senior Notes | 4.20% Senior Notes due September 2023
Debt Instrument [Line Items]
Principal Amount	$ 300,000,000		300,000,000
Carrying Value	$ 298,800,000		298,400,000
Interest rate	4.20%
Senior Notes | 4.90% Senior Notes due March 2028
Debt Instrument [Line Items]
Principal Amount	$ 300,000,000		300,000,000
Carrying Value	$ 297,400,000		297,200,000
Interest rate	4.90%
Senior Notes | 3.70% Senior Notes due February 2030
Debt Instrument [Line Items]
Principal Amount	$ 350,000,000		350,000,000
Carrying Value	$ 347,200,000		347,000,000
Interest rate	3.70%
Senior Notes | 2.65% Senior Notes due January 2032
Debt Instrument [Line Items]
Principal Amount	$ 350,000,000	$ 350,000,000	0
Carrying Value	$ 346,300,000		0
Interest rate	2.65%	2.65%
Senior Notes | 6.75% Senior Notes due February 2034
Debt Instrument [Line Items]
Principal Amount	$ 275,000,000		275,000,000
Carrying Value	$ 272,400,000		272,300,000
Interest rate	6.75%
Senior Subordinated Notes | 7.00% Fixed-to-Floating Rate Subordinated Notes due March 2048
Debt Instrument [Line Items]
Principal Amount	$ 400,000,000		400,000,000
Carrying Value	$ 395,800,000		395,400,000
Interest rate	7.00%
Senior Subordinated Notes | 7.00% Fixed-to-Floating Rate Subordinated Notes due March 2048 | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Interest rate, basis spread	4.135%
Senior Subordinated Notes | 5.25% Subordinated Notes due January 2061
Debt Instrument [Line Items]
Principal Amount	$ 250,000,000		250,000,000
Carrying Value	$ 244,000,000		$ 243,700,000
Interest rate	5.25%

Debt - Narrative (Details)

Debt - Narrative (Details) - USD ($)	1 Months Ended			3 Months Ended		9 Months Ended
	Jul. 30, 2021	Jun. 30, 2021	Mar. 31, 2018	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Debt Instrument [Line Items]
Loss on extinguishment of debt				$ (20,700,000)	$ 0	$ (20,700,000)	$ 0
Borrowed from credit facility				2,201,900,000		2,201,900,000		$ 2,252,900,000
Amortization of gain on swaptions				700,000	$ 700,000	2,200,000	$ 2,200,000
Senior Notes | 2.65% Senior Notes due January 2032
Debt Instrument [Line Items]
Debt issuance amount		$ 350,000,000		$ 350,000,000		$ 350,000,000		0
Interest rate		2.65%		2.65%		2.65%
Debt instrument, discount rate		0.158%
Debt instrument, redemption price, percentage		100.00%
Borrowed from credit facility				$ 346,300,000		$ 346,300,000		0
Senior Notes | 4.20% Senior Notes due September 2023
Debt Instrument [Line Items]
Debt issuance amount				$ 0		$ 0		350,000,000
Interest rate				4.00%		4.00%
Extinguishment of debt, amount	$ 350,000,000
Loss on extinguishment of debt				$ (20,700,000)
Borrowed from credit facility				0		$ 0		348,900,000
Senior Notes | 4.20% Senior Notes due September 2023
Debt Instrument [Line Items]
Debt issuance amount				$ 300,000,000		$ 300,000,000		300,000,000
Interest rate				4.20%		4.20%
Borrowed from credit facility				$ 298,800,000		$ 298,800,000		298,400,000
Senior Notes | 4.90% Senior Notes due March 2028
Debt Instrument [Line Items]
Debt issuance amount				$ 300,000,000		$ 300,000,000		300,000,000
Interest rate				4.90%		4.90%
Borrowed from credit facility				$ 297,400,000		$ 297,400,000		$ 297,200,000
Letter of Credit
Debt Instrument [Line Items]
Line of credit				4,500,000		4,500,000
Revolving Credit Facility | Revolving Credit Facility 2017
Debt Instrument [Line Items]
Borrowed from credit facility				0		0
Revolving Credit Facility | JPMorgan Chase Bank NA And Bank of America NA | Revolving Credit Facility 2017
Debt Instrument [Line Items]
Credit facility borrowing capacity				450,000,000		450,000,000
Senior revolving credit facility				575,000,000		575,000,000
Sublimit for letters of credit issued				50,000,000		50,000,000
Line of credit facility, remaining borrowing capacity				$ 445,500,000		445,500,000
Derivative
Debt Instrument [Line Items]
Deferred gain from effective cash flow hedges			$ 26,700,000
Interest Rate Derivatives
Debt Instrument [Line Items]
Deferred gain from effective cash flow hedges						$ 16,400,000

Debt - Rating Agencies Interest

Debt - Rating Agencies Interest Rate (Details) - 2.65% Senior Notes due January 2032	1 Months Ended
	Jun. 30, 2021
Maximum
Financing Receivable, Credit Quality Indicator [Line Items]
Interest rate, basis spread	2.00%
Senior Notes | BB Plus
Financing Receivable, Credit Quality Indicator [Line Items]
Interest rate, basis spread	0.25%
Senior Notes | BB
Financing Receivable, Credit Quality Indicator [Line Items]
Interest rate, basis spread	0.50%
Senior Notes | BB-
Financing Receivable, Credit Quality Indicator [Line Items]
Interest rate, basis spread	0.75%
Senior Notes | B Plus Or Below
Financing Receivable, Credit Quality Indicator [Line Items]
Interest rate, basis spread	1.00%
Senior Notes | Ba1
Financing Receivable, Credit Quality Indicator [Line Items]
Interest rate, basis spread	0.25%
Senior Notes | Ba2
Financing Receivable, Credit Quality Indicator [Line Items]
Interest rate, basis spread	0.50%
Senior Notes | Ba3
Financing Receivable, Credit Quality Indicator [Line Items]
Interest rate, basis spread	0.75%
Senior Notes | B1 or below
Financing Receivable, Credit Quality Indicator [Line Items]
Interest rate, basis spread	1.00%

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income - Components of Accumulated Other Comprehensive Income, Net of Tax (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance			$ 5,951.4
Change in accumulated other comprehensive income (loss) before reclassifications	$ (67.7)	$ 90.1	(164.5)	$ 214.6
Amounts reclassified from accumulated other comprehensive income (loss)	(620.4)	(0.8)	(629.4)	32.1
Total other comprehensive income (loss)	(688.1)	89.3	(793.9)	246.7
Ending balance	5,744.4		5,744.4
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	604	568.9	709.8	411.5
Total other comprehensive income (loss)	(688.1)	89.3	(793.9)	246.7
Ending balance	(84.1)	658.2	(84.1)	658.2
Foreign currency translation adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(274.8)	(379)	(295.6)	(358.9)
Change in accumulated other comprehensive income (loss) before reclassifications	(23.4)	35.3	(2.6)	(23.2)
Amounts reclassified from accumulated other comprehensive income (loss)	(0.3)	0	(0.3)	38.4
Total other comprehensive income (loss)	(23.7)	35.3	(2.9)	15.2
Ending balance	(298.5)	(343.7)	(298.5)	(343.7)
Net unrealized gains on securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	974.5	1,003.4	1,097.6	872
Change in accumulated other comprehensive income (loss) before reclassifications	(44.6)	55.3	(162.5)	189.4
Amounts reclassified from accumulated other comprehensive income (loss)	(618.5)	1.5	(623.7)	(1.2)
Total other comprehensive income (loss)	(663.1)	56.8	(786.2)	188.2
Ending balance	311.4	1,060.2	311.4	1,060.2
Net unrealized gains on derivative transactions
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	13.5	15.9	14.7	17.1
Change in accumulated other comprehensive income (loss) before reclassifications	0	0	0	0
Amounts reclassified from accumulated other comprehensive income (loss)	(0.6)	(0.6)	(1.8)	(1.8)
Total other comprehensive income (loss)	(0.6)	(0.6)	(1.8)	(1.8)
Ending balance	12.9	15.3	12.9	15.3
Unamortized net losses on Pension Plans
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(109.2)	(71.4)	(106.9)	(118.7)
Change in accumulated other comprehensive income (loss) before reclassifications	0.3	(0.5)	0.6	48.4
Amounts reclassified from accumulated other comprehensive income (loss)	(1)	(1.7)	(3.6)	(3.3)
Total other comprehensive income (loss)	(0.7)	(2.2)	(3)	45.1
Ending balance	$ (109.9)	$ (73.6)	$ (109.9)	$ (73.6)

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income - Narrative (Details) - Discontinued Operations, Held-for-sale - Global Preneed - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Gain on disposition of business, recognized from AOCI, net of tax	$ 606	$ 606
Pre-tax AOCI recognized in earning upon sale	774.2	774.2
Foreign currency translation adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Gain on disposition of business, recognized from AOCI, net of tax	0.3	0.3
Pre-tax AOCI recognized in earning upon sale	0.8	0.8
Net unrealized gains on securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Gain on disposition of business, recognized from AOCI, net of tax	605.7	605.7
Pre-tax AOCI recognized in earning upon sale	$ 773.4	$ 773.4

Accumulated Other Comprehensi_5

Accumulated Other Comprehensive Income - Reclassification out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Underwriting, general and administrative expenses	$ 818.3	$ 672.9	$ 2,301.2	$ 2,290.9
Net realized gains (losses) on investments	(112.1)	(17.2)	(123.2)	37.9
Provision for income taxes	37.9	24.5	134.4	20.6
Net of tax	(882.4)	30.5	(1,248.8)	(303.7)
Interest expense	27.5	25.5	84.7	77.7
Total reclassifications for the period, net of tax	(620.4)	(0.8)	(629.4)	32.1
Foreign currency translation adjustment
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications for the period, net of tax	(0.3)	0	(0.3)	38.4
Net unrealized (gains) losses on investments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications for the period, net of tax	(618.5)	1.5	(623.7)	(1.2)
Net unrealized gains on derivative transactions
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications for the period, net of tax	(0.6)	(0.6)	(1.8)	(1.8)
Unamortized net losses on Pension Plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications for the period, net of tax	(1)	(1.7)	(3.6)	(3.3)
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications for the period, net of tax	(620.4)	(0.8)	(629.4)	32.1
Reclassification out of Accumulated Other Comprehensive Income | Foreign currency translation adjustment
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Underwriting, general and administrative expenses	(0.8)	0	(0.8)	38.4
Provision for income taxes	0.5	0	0.5	0
Net of tax	(0.3)	0	(0.3)	38.4
Reclassification out of Accumulated Other Comprehensive Income | Net unrealized (gains) losses on investments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net realized gains (losses) on investments	(789.6)	1.8	(796.1)	(1.6)
Provision for income taxes	171.1	(0.3)	172.4	0.4
Net of tax	(618.5)	1.5	(623.7)	(1.2)
Reclassification out of Accumulated Other Comprehensive Income | Net unrealized gains on derivative transactions
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Provision for income taxes	0.1	0.1	0.3	0.3
Net of tax	(0.6)	(0.6)	(1.8)	(1.8)
Interest expense	(0.7)	(0.7)	(2.1)	(2.1)
Reclassification out of Accumulated Other Comprehensive Income | Unamortized net losses on Pension Plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	(1.3)	(2.1)	(4.5)	(4.1)
Provision for income taxes	0.3	0.4	0.9	0.8
Total reclassifications for the period, net of tax	(1)	(1.7)	(3.6)	(3.3)
Reclassification out of Accumulated Other Comprehensive Income | Amortization of net loss
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	1.8	1.3	5.4	3.8
Reclassification out of Accumulated Other Comprehensive Income | Amortization of prior service credit
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	(3.4)	(3.4)	(10.2)	(7.9)
Reclassification out of Accumulated Other Comprehensive Income | Settlement loss
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	$ 0.3	$ 0	$ 0.3	$ 0

Stock Based Compensation - Long

Stock Based Compensation - Long-Term Equity Incentive Plans (Details)	May 31, 2021shares
Long-Term Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Company's common stock authorized to employees (in shares) (up to)	1,840,112

Stock Based Compensation - Rest

Stock Based Compensation - Restricted Stock Units (Details) - Long-Term Equity Incentive Plan - Restricted Stock Units - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 8.8	$ 7.2	$ 23.5	$ 20.8
Income tax benefit	(1.5)	(1.4)	(4.2)	(3.8)
Compensation expense, net of tax	$ 7.3	$ 5.8	$ 19.3	$ 17
RSUs granted (in shares)	18,590	32,844	216,983	294,794
Weighted average grant date fair value per unit (in dollars per share)	$ 156.85	$ 101.81	$ 140.60	$ 92.20
Total fair value of vested RSUs	$ 9.7	$ 4.8	$ 42	$ 29.2
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized [Abstract]
Unrecognized compensation cost	$ 26.2		$ 26.2
Unrecognized compensation cost expected to be recognized over a weighted-average period (in years)			1 year 1 month 6 days

Stock Based Compensation - Perf

Stock Based Compensation - Performance Stock Units (Details) - Long-Term Equity Incentive Plan - Performance Share Units - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 8.9	$ 7.6	$ 23.7	$ 19.7
Income tax benefit	(1.1)	(0.8)	(2.9)	(2.1)
Compensation expense, net of tax	$ 7.8	$ 6.8	$ 20.8	$ 17.6
PSUs granted (in shares)	0	0	208,040	302,274
Weighted average grant date fair value per unit (in dollars per share)	$ 0	$ 0	$ 148.04	$ 87.36
Total fair value of vested PSUs	$ 2.1	$ 0.3	$ 24.6	$ 24.7
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized [Abstract]
Unrecognized compensation cost	$ 29.5		$ 29.5
Unrecognized compensation cost expected to be recognized over a weighted-average period (in years)			10 months 24 days

Equity Transactions - Narrative

Equity Transactions - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended	9 Months Ended		12 Months Ended
	Mar. 31, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Mar. 31, 2018
Class of Stock [Line Items]
Stock repurchased in period (in shares)			3,513,870	1,312,443
Stock repurchased in period			$ 554.7	$ 153.2
Amount remaining under total repurchase authorization			1,130
Preferred stock dividends		$ 4.7	$ 4.7	14
MCPS
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)			0		2,875,000	2,875,000
Preferred stock, par value (in dollars per share)			$ 1		$ 1	$ 1
Public offering price (in dollars per share)						$ 100
Stock conversion ratio (in shares)	0.9405
Number of shares converted (in shares)	2,703,911
Share interest rate			6.50%		6.50%
Liquidation price (in dollars per share)			$ 100
Preferred stock dividends		$ 4.7	$ 4.7	$ 14

Earnings Per Common Share - Net

Earnings Per Common Share - Net Income, Weighted Average Common Shares Used in Calculating Basic Earnings Per Common Share and Diluted EPS (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Numerator
Net income from continuing operations	$ 153.6	$ 88	$ 486.8	$ 401.3
Less: Net loss (income) attributable to non-controlling interest	0	0.3	0	(1.1)
Net income from continuing operations attributable to stockholders	153.6	88.3	486.8	400.2
Less: Preferred stock dividends	0	(4.7)	(4.7)	(14)
Net income from continuing operations attributable to common stockholders	153.6	83.6	482.1	386.2
Net income from continuing operations attributable to common stockholders	153.6	83.6	482.1	386.2
Less: Common stock dividends paid	(38.5)	(37.5)	(118.5)	(115.1)
Undistributed earnings	115.1	46.1	363.6	271.1
Undistributed earnings	115.1	46.1	363.6	271.1
Add: Net income (loss) from discontinued operations	728.8	(118.5)	762	(97.6)
Net income (loss) attributable to common stockholders, basic	882.4	(34.9)	1,244.1	288.6
Net income (loss) attributable to common stockholders, diluted	$ 882.4	$ (34.9)	$ 1,244.1	$ 288.6
Denominator
Weighted average common shares outstanding used in basic per common share calculations (in shares)	59,126,313	60,190,103	59,769,690	60,384,817
Incremental common shares from:
Weighted average common shares outstanding used in diluted per common share calculations (in shares)	59,479,464	60,425,722	60,855,321	63,340,858
Basic
Distributed earnings (in dollars per share)	$ 0.65	$ 0.62	$ 1.98	$ 1.91
Undistributed earnings (in dollars per share)	1.95	0.77	6.09	4.48
Net income from continuing operations (in dollars per share)	2.60	1.39	8.07	6.39
Net income (loss) from discontinued operations (in dollars per share)	12.32	(1.97)	12.74	(1.61)
Net income (loss) attributable to common stockholders (in dollars per share)	14.92	(0.58)	20.81	4.78
Diluted
Distributed earnings (in dollars per share)	0.65	0.62	1.95	1.82
Undistributed earning (in dollars per share)	1.93	0.76	6.05	4.50
Net income from continuing operations (in dollars per share)	2.58	1.38	8	6.32
Net income (loss) from discontinued operations (in dollars per share)	12.25	(1.96)	12.52	(1.54)
Net income (loss) attributable to common stockholders (in dollars per share)	$ 14.83	$ (0.58)	$ 20.52	$ 4.78
PSUs
Incremental common shares from:
Incremental common shares (in shares)	352,918	233,039	371,793	253,982
ESPP
Incremental common shares from:
Incremental common shares (in shares)	233	2,580	0	2,146
MCPS
Incremental common shares from:
Mandatory convertible preferred stock (in shares)	0	0	713,838	2,699,913

Earnings Per Common Share - Nar

Earnings Per Common Share - Narrative (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
PSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Outstanding anti-dilutive shares excluded from computation of diluted EPS (in shares)	3,289	0	1,650	0
MCPS
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Outstanding anti-dilutive shares excluded from computation of diluted EPS (in shares)		2,699,913

Retirement and Other Employee_3

Retirement and Other Employee Benefits - Narrative (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020	Feb. 29, 2020
Defined Benefit Plan Disclosure [Line Items]
Qualified pension benefits plan funded status	$ 56,600,000	$ 43,200,000
Funded status percentage	107.00%	105.00%
Cash contribution to qualified pension benefits plan	$ 0
Cash expected contribution to plan over remainder of fiscal year	$ 0
Retirement Health Benefits
Defined Benefit Plan Disclosure [Line Items]
Discount rate (as a percentage)			1.55%
Reduction in obligations		$ 65,600,000

Retirement and Other Employee_4

Retirement and Other Employee Benefits - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Pension Plan | Qualified Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 3.5	$ 5.1	$ 10.5	$ 15.3
Expected return on plan assets	(6.8)	(7.7)	(20.6)	(23.1)
Amortization of prior service credit	0	0	0	0
Amortization of net loss (gain)	1.2	0.7	3.6	2.1
Settlement loss	0	0	0	0
Net periodic benefit cost	(2.1)	(1.9)	(6.5)	(5.7)
Pension Plan | Unfunded Nonqualified  Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Interest cost	0.3	0.5	0.9	1.5
Expected return on plan assets	0	0	0	0
Amortization of prior service credit	0	0	0	0
Amortization of net loss (gain)	0.8	0.6	2.4	1.7
Settlement loss	0.3	0	0.3	0
Net periodic benefit cost	1.4	1.1	3.6	3.2
Retirement Health Benefits
Defined Benefit Plan Disclosure [Line Items]
Interest cost	0.1	0.1	0.1	0.6
Expected return on plan assets	(0.4)	(0.8)	(1.2)	(1.3)
Amortization of prior service credit	(3.4)	(3.4)	(10.2)	(7.9)
Amortization of net loss (gain)	(0.2)	0	(0.4)	0
Settlement loss	0	0	0	0
Net periodic benefit cost	$ (3.9)	$ (4.1)	$ (11.7)	$ (8.6)

Commitments and Contingencies -

Commitments and Contingencies - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Letters of credit outstanding	$ 7.2	$ 7.6