Cover Page - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2022	Feb. 07, 2023	Jun. 30, 2022
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Current Fiscal Year End Date	--12-31
Document Period End Date	Dec. 31, 2022
Document Transition Report	false
Entity File Number	001-18298
Entity Registrant Name	Kemper Corporation
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	95-4255452
Entity Address, Address Line One	200 E. Randolph Street
Entity Address, Address Line Two	Suite 3300
Entity Address, City or Town	Chicago
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	60601
City Area Code	312
Local Phone Number	661-4600
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 3.0
Entity Common Stock, Shares Outstanding (in shares)		63,959,923
Documents Incorporated by Reference	Portions of the Proxy Statement for the 2023 Annual Meeting of Shareholders are incorporated by reference into Part III.
Entity Central Index Key	0000860748
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Amendment Flag	false
Common Stock
Cover [Abstract]
Title of 12(b) Security	Common Stock, $0.10 par value per share
Trading Symbol	KMPR
Security Exchange Name	NYSE
Entity Listings [Line Items]
Trading Symbol	KMPR
Title of 12(b) Security	Common Stock, $0.10 par value per share
Security Exchange Name	NYSE
5.875% Fixed-Rate Reset Junior Subordinated Debentures due 2062
Cover [Abstract]
Title of 12(b) Security	5.875% Fixed-Rate Reset Junior Subordinated Debentures due 2062
Trading Symbol	KMPB
Security Exchange Name	NYSE
Entity Listings [Line Items]
Trading Symbol	KMPB
Title of 12(b) Security	5.875% Fixed-Rate Reset Junior Subordinated Debentures due 2062
Security Exchange Name	NYSE