Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Net Income	$ 69.8	$ 74.4	$ 166.8	$ 144.6
Other Comprehensive Income Before Income Taxes
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	(0.6)	(0.8)	(1.1)	(1.7)
(Loss) Gain on Cash Flow Hedges	(1.7)	(3.6)	0.4	(3.6)
Change in Discount Rate on Future Life Policyholder Benefits	5.1	108.8	(13.0)	249.9
Other Comprehensive Income (Loss), before Tax, Total	4.9	22.2	58.9	54.7
Other Comprehensive Income Tax Expense	1.1	4.5	11.9	11.2
Other Comprehensive Income, Net of Taxes	3.8	17.7	47.0	43.5
Total Comprehensive Income	73.6	92.1	213.8	188.1
Less: Net Loss attributable to Noncontrolling Interest	(2.8)	(1.0)	(5.5)	(2.1)
Less: Other Comprehensive Income attributable to Noncontrolling Interest	0.2	0.0	0.2	0.0
Less: Total Comprehensive Loss attributable to Noncontrolling Interest	(2.6)	(1.0)	(5.3)	(2.1)
Comprehensive Income attributable to Kemper Corporation	76.2	93.1	219.1	190.2
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:	2.1	(79.2)	71.3	(188.2)
Credit Losses Recognized in Condensed Consolidated Statements of Income
Other Comprehensive Income Before Income Taxes
Changes in Unrealized Gains (Losses) on Investment Securities with:	$ 0.0	$ (3.0)	$ 1.3	$ (1.7)