CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenues
Premiums and contract charges earned	$ 225.8	$ 225.4	$ 453.4	$ 461.7
Net investment income	109.2	80.4	204.7	162.7
Net investment gains (losses)	4.9	3.2	(4.1)	(15.3)
Other income	7.2	5.9	15.1	13.1
Total revenues	347.1	314.9	669.1	622.2
Benefits, losses and expenses
Benefits, claims and settlement expenses	147.1	143.0	281.4	281.7
Interest credited	51.2	50.7	101.8	102.2
Operating expenses	60.5	55.7	118.5	116.4
DAC unlocking and amortization expense	23.5	20.4	47.6	50.4
Intangible asset amortization expense	3.2	3.7	6.5	7.4
Interest expense	3.5	4.0	7.0	8.2
Total benefits, losses and expenses	289.0	277.5	562.8	566.3
Income before income taxes	58.1	37.4	106.3	55.9
Income tax expense	11.4	6.9	20.3	6.9
Net income	$ 46.7	$ 30.5	$ 86.0	$ 49.0
Net income per share
Basic (in usd per share)	$ 1.11	$ 0.73	$ 2.05	$ 1.17
Diluted (in usd per share)	$ 1.11	$ 0.73	$ 2.04	$ 1.17
Weighted average number of shares and equivalent shares
Basic (in shares)	42.0	41.9	42.0	41.9
Diluted (in shares)	42.1	42.0	42.1	42.0
Net income	$ 46.7	$ 30.5	$ 86.0	$ 49.0
Other comprehensive income (loss), net of tax:
Change in net unrealized investment gains (losses) on fixed maturity securities	88.6	142.5	(34.1)	48.7
Change in net funded status of benefit plans	0.0	0.0	0.0	0.0
Other comprehensive income (loss)	88.6	142.5	(34.1)	48.7
Comprehensive income (loss)	$ 135.3	$ 173.0	$ 51.9	$ 97.7