Condensed Consolidated Statements of Income - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Income Statement [Abstract]
Earned Premiums	[1]	$ 1,130.8	$ 1,033.7	$ 2,218.7	$ 2,065.6
Net Investment Income		95.9	93.0	197.1	193.4
Other Income		3.1	3.0	5.7	5.2
Change in Fair Value of Equity and Convertible Securities		(0.5)	(1.2)	(0.4)	2.2
Net Realized Investment (Losses) Gains		(0.1)	1.5	0.8	8.1
Impairment Losses		(3.6)	(0.1)	(3.3)	(1.6)
Total Revenues		1,225.6	1,129.9	2,418.6	2,272.9
Expenses:
Policyholders’ Benefits and Incurred Losses and Loss Adjustment Expenses	[2]	829.1	744.4	1,596.4	1,500.4
Insurance and Other Expenses		300.0	279.7	594.5	566.1
Interest Expense		9.0	13.9	20.4	27.9
Total Expenses		1,138.1	1,038.0	2,211.3	2,094.4
Income before Income Taxes		87.5	91.9	207.3	178.5
Income Tax Expense		(17.7)	(17.5)	(40.5)	(33.9)
Net Income		69.8	74.4	166.8	144.6
Less: Net Loss attributable to Noncontrolling Interest		(2.8)	(1.0)	(5.5)	(2.1)
Net Income attributable to Kemper Corporation		$ 72.6	$ 75.4	$ 172.3	$ 146.7
Net Income attributable to Kemper Corporation per Unrestricted Share:
Basic (in dollars per share)		$ 1.13	$ 1.17	$ 2.69	$ 2.28
Diluted (in dollars per share)		$ 1.12	$ 1.16	$ 2.66	$ 2.26

[1] 1 Includes a remeasurement loss related to the deferred profit liability within the Life insurance business of $0.9 million for the three months ended June 30, 2025 and 2024, and a remeasurement loss of $0.7 million for the six months ended June 30, 2025 and 2024.

[2] 2 Includes a remeasurement gain related to the liability for future policyholder benefits within the Life insurance business of $0.2 million and $1.7 million for the three months ended June 30, 2025 and 2024, respectively, and a remeasurement gain of $1.5 million for the six months ended June 30, 2024. There was no remeasurement gain or loss for the six months ended June 30, 2025.