Income Taxes (Details) - USD ($)	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Income Tax Contingency [Line Items]
Income tax expense (benefit) attributable to Kemper Corporation	$ 23,500,000	$ 16,800,000
Effective income tax rate reconciliation, percent	19.10%	19.10%
Unrecognized Tax Benefits	$ 0		$ 0
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	0	$ 0
Proceeds from income tax refund, federal	0	10,400,000
State and Local Jurisdiction
Income Tax Contingency [Line Items]
Proceeds from Income Tax Refunds	0	0
Foreign Tax Jurisdiction
Income Tax Contingency [Line Items]
Proceeds from Income Tax Refunds	$ 0	$ 0