Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Net Income	$ 97.0	$ 70.2
Other Comprehensive Income Before Income Taxes
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	(0.5)	(0.9)
Gain on Cash Flow Hedges	2.1	0.0
Change in Discount Rate on Future Life Policyholder Benefits	(18.1)	141.1
Other Comprehensive Income (Loss), before Tax, Total	54.0	32.5
Other Comprehensive Income Tax Expense	10.8	6.7
Other Comprehensive Income, Net of Taxes	43.2	25.8
Total Comprehensive Income	140.2	96.0
Less: Net Loss attributable to Noncontrolling Interest	(2.7)	(1.1)
Less: Other Comprehensive Income attributable to Noncontrolling Interest	0.0	0.0
Less: Total Comprehensive Loss attributable to Noncontrolling Interest	(2.7)	(1.1)
Total Comprehensive Income	142.9	97.1
No Credit Losses Recognized in Condensed Consolidated Statements of Income
Other Comprehensive Income Before Income Taxes
Changes in Unrealized Gains (Losses) on Investment Securities with:	69.2	(109.0)
Credit Losses Recognized in Condensed Consolidated Statements of Income
Other Comprehensive Income Before Income Taxes
Changes in Unrealized Gains (Losses) on Investment Securities with:	$ 1.3	$ 1.3