Deferred Policy Acquisition Costs (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Beginning balance	$ 656.7	$ 630.0
Capitalizations	142.8	159.6
Amortization Expense	(128.9)	(138.4)
Ending balance	670.6	651.2
Experience adjustments	(0.4)	(0.9)
Variable Interest Entity, Primary Beneficiary
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Beginning balance	1.3	1.1
Ending balance	1.0	1.5
Operating Segments
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Beginning balance	655.9	625.9
Capitalizations	141.7	157.9
Amortization Expense	(128.4)	(136.0)
Ending balance	669.2	647.8
Operating Segments \| Specialty
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Beginning balance	158.8	162.8
Capitalizations	125.6	143.0
Amortization Expense	(121.6)	(128.9)
Ending balance	162.8	176.9
Operating Segments \| Life
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Beginning balance	497.1	463.1
Capitalizations	16.1	14.9
Amortization Expense	(6.8)	(7.1)
Ending balance	506.4	470.9
Corporate and Other
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Beginning balance	0.8	4.1
Capitalizations	1.1	1.7
Amortization Expense	(0.5)	(2.4)
Ending balance	$ 1.4	$ 3.4

KEMPER Corp 10-Q