Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Investments:
Fixed maturity securities available for sale, at fair value (amortized cost - $8,739.7 in 2017 and $8,870.8 in 2016)	$ 9,491.2	$ 9,572.1
Equity securities available for sale, at fair value (cost - $367.9 in 2017 and $381.8 in 2016)	415.9	421.4
Commercial mortgage loans on real estate, at amortized cost	603.3	624.0
Policy loans	37.9	38.5
Short-term investments	229.3	227.7
Other investments	676.0	595.3
Total investments	11,453.6	11,479.0
Cash and cash equivalents	874.5	1,032.0
Premiums and accounts receivable, net	1,244.0	1,218.0
Reinsurance recoverables	8,868.8	9,083.2
Accrued investment income	111.4	110.1
Deferred acquisition costs	3,290.0	3,267.4
Property and equipment, at cost less accumulated depreciation	348.8	343.6
Tax receivable	10.2	20.5
Goodwill	894.5	830.9
Value of business acquired	30.1	32.1
Other intangible assets, net	330.0	240.3
Other assets	361.5	359.7
Assets held in separate accounts	1,750.3	1,692.3
Total assets	29,567.7	29,709.1
Liabilities
Future policy benefits and expenses	10,163.9	10,112.9
Unearned premiums	6,601.6	6,626.5
Claims and benefits payable	3,075.4	3,301.2
Commissions payable	391.7	386.2
Reinsurance balances payable	142.5	95.3
Funds held under reinsurance	128.7	111.7
Deferred gains on disposal of businesses	194.1	232.2
Accounts payable and other liabilities	1,893.4	1,985.7
Debt	1,067.3	1,067.0
Liabilities related to separate accounts	1,750.3	1,692.3
Total liabilities	25,408.9	25,611.0
Commitments and contingencies
Stockholders’ equity
Common stock, par value $0.01 per share, 800,000,000 shares authorized, 55,029,813 and 55,941,480 shares outstanding at March 31, 2017 and December 31, 2016, respectively	1.5	1.5
Additional paid-in capital	3,173.5	3,175.9
Retained earnings	5,410.8	5,296.7
Accumulated other comprehensive income	148.3	94.6
Treasury stock, at cost; 95,124,719 and 94,041,583 shares at March 31, 2017 and December 31, 2016, respectively	(4,575.3)	(4,470.6)
Total stockholders’ equity	4,158.8	4,098.1
Total liabilities and stockholders’ equity	$ 29,567.7	$ 29,709.1