Income Taxes (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Income Tax Contingency [Line Items]
Income tax expense (benefit) attributable to Kemper Corporation	$ 18,400,000	$ 17,700,000	$ 41,900,000	$ 34,500,000
Effective income tax rate reconciliation, percent	20.20%	19.00%	19.60%	19.00%
Unrecognized Tax Benefits	$ 0		$ 0		$ 0
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	$ 0	$ 0	0	$ 0
Income Tax Paid, Federal, after Refund Received			20,500,000	5,600,000
Income Tax Paid, State and Local, after Refund Received			1,700,000	500,000
Foreign Tax Jurisdiction
Income Tax Contingency [Line Items]
Proceeds from Income Tax Refunds			$ 0	$ 0