Consolidated Statements of Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022		Dec. 31, 2021	[1]
Revenues:
Earned Premiums (Changes in Deferred Profit Liability: 2023 - $84.2, 2022 - $60.2 and 2021 -$80.7)	$ 4,529.4	$ 5,213.4	[1]	$ 5,179.2
Net Investment Income	419.7	422.6	[1]	427.3
Change in Value of Alternative Energy Partnership Investments	2.9	(19.9)	[1]	(61.2)
Other Income	7.2	9.2	[1]	4.8
Income (Loss) from Change in Fair Value of Equity and Convertible Securities	4.7	(79.9)	[1]	114.6
Net Realized Investment (Losses) Gains	(18.6)	4.3	[1]	64.8
Impairment Losses	(1.1)	(25.8)	[1]	(11.0)
Total Revenues	4,944.2	5,523.9	[1]	5,718.5
Expenses:
Policyholders’ Benefits and Incurred Losses and Loss Adjustment Expenses (Changes in Liability for Future Policyholder Benefits: 2023 - $33.5, 2022 - $12.0 and 2021 - $30.2)	3,820.0	4,432.6	[1]	4,519.6
Insurance Expenses	1,052.4	1,201.0	[1]	1,228.8
Loss from Early Extinguishment of Debt	0.0	3.7	[2]	0.0
Interest and Other Expenses	369.3	257.6	[1]	219.4
Goodwill impairment	49.6	0.0	[2]	0.0
Total Expenses	5,291.3	5,894.9	[1]	5,967.8
Loss before Income Taxes	(347.1)	(371.0)	[1]	(249.3)
Income Tax Benefit	74.8	84.4	[1]	125.6
Net Loss	(272.3)	(286.6)	[1]	(123.7)
Less: Net Loss attributable to Noncontrolling Interest	(0.2)	0.0	[1]	0.0
Net Loss attributable to Kemper Corporation	$ (272.1)	$ (286.6)	[1]	$ (123.7)
Net Loss attributable to Kemper Corporation Per Unrestricted Share:
Basic (in dollars per share)	$ (4.25)	$ (4.50)	[1]	$ (1.92)
Diluted (in dollars per share)	$ (4.25)	$ (4.50)	[1]	$ (1.92)

[1] As of January 1, 2023, the Company adopted ASU 2018-12 using the modified retrospective method applied as of the transition date of January 1, 2021. Prior period amounts in the financial statements have been recast to reflect application of the new guidance. See Note 2 to the Consolidated Financial Statements for additional information.

[2] As of January 1, 2023, the Company adopted ASU 2018-12 using the modified retrospective method applied as of the transition date of January 1, 2021. Prior period amounts in the financial statements have been recast to reflect application of the new guidance. See Note 2 to the Consolidated Financial Statements for additional information.