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Debt Instrument, Interest Deferrals, Period

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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Amount of increase in the fair value of derivatives recognized in the income statement.

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Indicates line item in statement of income or comprehensive income that includes gain from derivative.

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Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects.

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The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

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Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Schedule 2 - Parent Company Financial Statements - Narrative (Details)			12 Months Ended
	Feb. 11, 2025	Mar. 10, 2022 USD ($) deferral_period	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Jan. 15, 2025 USD ($)	Jul. 01, 2022 USD ($)	Feb. 15, 2022 USD ($)	Sep. 22, 2020
Condensed Financial Statements, Captions [Line Items]
Guarantor obligations			$ 40,000,000
Long-term Debt			943,500,000	$ 1,391,600,000
Gain on derivative			$ 5,900,000
Derivative, Gain, Statement of Income or Comprehensive Income [Extensible Enumeration]			Gain (Loss) on Cash Flow Hedges
Amortization			$ 600,000
Net gain on derivative instrument			$ 500,000
Senior Notes, 4.35 Percent Due February 15, 2025 \| Senior Notes
Condensed Financial Statements, Captions [Line Items]
Stated interest rate, percentage			4.35%
Long-term debt, gross					$ 450,000,000.0
Redemption price, percentage	100.00%
Senior Notes, 2.400 Percent Due September 30, 2030 \| Senior Notes
Condensed Financial Statements, Captions [Line Items]
Stated interest rate, percentage								2.40%
Long-term debt, gross			$ 400,000,000.0
Proceeds from debt, net of issuance costs			395,800,000
Debt instrument, effective interest rate								2.52%
Long-term Debt			397,900,000	397,500,000
Senior Notes, 3.800 Percent Due February 23, 2032
Condensed Financial Statements, Captions [Line Items]
Long-term Debt							$ 395,100,000
Senior Notes, 3.800 Percent Due February 23, 2032 \| Senior Notes
Condensed Financial Statements, Captions [Line Items]
Stated interest rate, percentage							3.80%
Long-term debt, gross			400,000,000
Debt instrument, effective interest rate								3.95%
Long-term Debt			396,900,000	396,500,000
5.875% Fixed-Rate Reset Junior Subordinated Debentures due 2062
Condensed Financial Statements, Captions [Line Items]
Long-term Debt		$ 144,700,000
5.875% Fixed-Rate Reset Junior Subordinated Debentures due 2062 \| Senior Notes
Condensed Financial Statements, Captions [Line Items]
Long-term debt, gross			150,000,000
5.875% Fixed-Rate Reset Junior Subordinated Debentures due 2062 \| Junior Debt
Condensed Financial Statements, Captions [Line Items]
Stated interest rate, percentage		5.875%
Long-term Debt			148,700,000	147,700,000
Debt instrument, basis spread on variable rate		4.14%
Interest deferrals, number of deferral periods \| deferral_period		1
Interest deferrals, period (up to)		5 years
Subsidiary of Common Parent \| Non-cash Dividends
Condensed Financial Statements, Captions [Line Items]
Related party transaction, amounts of transaction			14,800,000	0
Parent Company \| Non-cash Capital Contributions
Condensed Financial Statements, Captions [Line Items]
Related party transaction, amounts of transaction			$ 77,400,000	$ 0
Kemper Bermuda Ltd
Condensed Financial Statements, Captions [Line Items]
Guarantor obligations						$ 300,000,000