Consolidated Balance Sheets - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020
Investments:
Fixed maturity securities available for sale, at fair value (net of allowances for credit losses of zero and $1.2 at December 31, 2021 and 2020, respectively; amortized cost – $6,903.9 and $6,245.8 at December 31, 2021 and 2020, respectively)		$ 7,215.3	$ 6,815.5
Equity securities at fair value		445.7	290.2
Commercial mortgage loans on real estate, at amortized cost (net of allowances for credit losses of $1.1 and $1.6 at December 31, 2021 and 2020, respectively)		256.5	138.3
Short-term investments		247.8	292.0
Other investments (net of allowances for credit losses of zero and $1.4 at December 31, 2021 and 2020, respectively)		506.3	686.8
Total investments		8,671.6	8,222.8
Cash and cash equivalents		2,040.8	2,207.6
Premiums and accounts receivable (net of allowances for credit losses of $9.4 and $13.3 at December 31, 2021 and 2020, respectively)		1,942.5	1,548.9
Reinsurance recoverables (net of allowances for credit losses of $5.0 and $24.6 at December 31, 2021 and 2020, respectively)		6,178.9	6,605.4
Accrued investment income		62.1	67.0
Deferred acquisition costs		8,811.0	7,388.0
Property and equipment, net		561.4	446.1
Goodwill		2,571.6	2,589.3
Value of business acquired		583.4	1,152.2
Other intangible assets, net		719.2	696.2
Other assets (net of allowances for credit losses of $2.5 and $1.8 at December 31, 2021 and 2020, respectively)		680.2	496.2
Assets held in separate accounts		11.9	11.5
Assets held for sale (Note 4)		1,076.9	13,218.7
Total assets		33,911.5	44,649.9
Liabilities
Future policy benefits and expenses		413.2	1,358.5
Unearned premiums		18,623.7	17,293.1
Claims and benefits payable		1,595.9	1,610.3
Commissions payable		692.7	699.1
Reinsurance balances payable		420.4	359.3
Funds held under reinsurance		364.2	358.6
Accounts payable and other liabilities		3,032.5	2,640.5
Debt		2,202.5	2,252.9
Liabilities related to separate accounts		11.9	11.5
Liabilities held for sale (Note 4)		1,064.8	12,111.3
Total liabilities		28,421.8	38,695.1
Commitments and contingencies (Note 27)
Stockholders’ equity
6.50% Series D mandatory convertible preferred stock, par value $1.00 per share, zero and 2,875,000 shares authorized, issued and outstanding at December 31, 2021 and 2020, respectively (1)	[1]	0.0	2.9
Common stock, par value $0.01 per share, 800,000,000 shares authorized, 58,050,202 and 62,967,808 shares issued and 55,754,113 and 57,967,808 shares outstanding at December 31, 2021 and 2020, respectively		0.7	0.6
Additional paid-in capital		1,695.0	1,956.8
Retained earnings		4,066.8	3,548.7
Accumulated other comprehensive (loss) income		(150.0)	709.8
Treasury stock, at cost; 2,296,089 and 5,000,000 shares at December 31, 2021 and 2020, respectively		(122.8)	(267.4)
Total Assurant, Inc. stockholders’ equity		5,489.7	5,951.4
Non-controlling interest		0.0	3.4
Total equity		5,489.7	5,954.8
Total liabilities and equity		$ 33,911.5	$ 44,649.9

[1] Each outstanding share of mandatory convertible preferred stock converted to common stock in March 2021. Refer to Note 20 for further information.