Unaudited Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014	Dec. 31, 2013
ASSETS
Fixed maturity securities-available-for-sale (amortized cost of $7,699.6 and $7,390.0)	$ 7,953.2	$ 7,773.7
Commercial mortgage loans, net	5,547.3	5,321.1
Real estate, net	25.4	37.0
Other invested assets	306.6	301.6
Total investments	13,832.5	13,433.4
Cash and cash equivalents	330.3	251.1	$ 379.3
Premiums and other receivables	141.9	118.4
Accrued investment income	110.4	108.0
Amounts recoverable from reinsurers	995.0	994.2
Deferred acquisition costs, value of business acquired and other intangible assets, net	387.7	381.0	371.3
Goodwill	36.0	36.0
Property and equipment, net	85.2	79.3
Other assets	166.0	129.4
Separate account assets	6,797.2	7,179.8
Total assets	22,882.2	22,710.6
Liabilities:
Future policy benefits and claims	5,820.4	5,832.3
Other policyholder funds	6,905.5	6,537.8
Deferred tax liabilities, net	16.7	60.0
Short-term debt	1.2	1.1
Long-term debt	504.8	503.9
Other liabilities	564.4	440.1
Separate account liabilities	6,797.2	7,179.8
Total liabilities	$ 20,610.2	$ 20,555.0
Commitments and contingencies (See Note 10)
Shareholders' equity:
Preferred stock, 100,000,000 shares authorized; none issued	$ 0.0	$ 0.0
Common stock, no par, 300,000,000 shares authorized; 42,342,304 and 42,077,825 shares issued and outstanding at September 30, 2015 and December 31, 2014, respectively	23.3	5.3	68.0
Accumulated other comprehensive income	36.7	114.3	134.7
Retained earnings	2,212.0	2,036.0	1,942.9
Total shareholders' equity	2,272.0	2,155.6	$ 2,145.6
Total liabilities and shareholders' equity	$ 22,882.2	$ 22,710.6