CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenues
Net premiums and contract charges earned	$ 280.9	$ 260.7	$ 556.1	$ 516.6
Net investment income	108.4	108.5	213.8	208.9
Net investment gains (losses)	(5.9)	(17.4)	(3.7)	(21.3)
Other income	4.7	4.6	7.9	6.1
Total revenues	388.1	356.4	774.1	710.3
Benefits, losses and expenses
Benefits, claims and settlement expenses	207.3	205.2	383.6	388.4
Interest credited	53.8	50.7	106.7	99.4
Operating expenses	83.0	80.1	167.5	159.9
DAC amortization expense	27.0	25.4	54.0	49.1
Intangible asset amortization expense	3.7	3.7	7.3	7.4
Interest expense	8.7	6.9	17.4	13.6
Total benefits, losses and expenses	383.5	372.0	736.5	717.8
Income before income taxes	4.6	(15.6)	37.6	(7.5)
Income tax expense	0.8	(2.8)	7.3	(1.3)
Net income (loss)	$ 3.8	$ (12.8)	$ 30.3	$ (6.2)
Net income per share
Basic (in usd per share)	$ 0.09	$ (0.31)	$ 0.74	$ (0.15)
Diluted (in usd per share)	$ 0.09	$ (0.31)	$ 0.73	$ (0.15)
Weighted average number of shares and equivalent shares
Basic (in shares)	41.4	41.3	41.3	41.3
Diluted (in shares)	41.6	41.4	41.5	41.4
Statements of Comprehensive Income (Loss)
Net income (loss)	$ 3.8	$ (12.8)	$ 30.3	$ (6.2)
Other comprehensive income (loss), net of tax:
Change in net unrealized investment losses on fixed maturity securities	(22.4)	(37.3)	(42.1)	55.9
Change in net reserve remeasurements attributable to discount rates	32.0	25.1	73.4	(16.1)
Change in net funded status of benefit plans	0.0	0.0	0.0	0.0
Other comprehensive income	9.6	(12.2)	31.3	39.8
Comprehensive income (loss)	$ 13.4	$ (25.0)	$ 61.6	$ 33.6