XML 68 R56.htm IDEA: XBRL DOCUMENT v3.25.3

Liability for Future Policyholder Benefits - Changes in Deferred Profit Liability (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Deferred Profit Liability [Roll Forward]
Balance, beginning of period	$ 412.1	$ 337.8
Profits deferred	118.4	121.1
Interest accrual	14.9	12.5
Amortization	(86.6)	(82.0)
Effect of actual variances from expected experience and other changes	1.6	1.2
Balance, end of period	$ 460.4	$ 390.6

X

- Definition

Deferred Profit Liability

+ References

No definition available.

+ Details

Name:	kmpr_DeferredProfitLiabilityRollForward
Namespace Prefix:	kmpr_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Liability For Future Policy Benefit, Before Reinsurance, Deferred Profit Liability

+ References

No definition available.

+ Details

Name:	kmpr_LiabilityForFuturePolicyBenefitBeforeReinsuranceDeferredProfitLiability
Namespace Prefix:	kmpr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Liability For Future Policy Benefit, Before Reinsurance, Deferred Profit Liability, Amortization

+ References

No definition available.

+ Details

Name:	kmpr_LiabilityForFuturePolicyBenefitBeforeReinsuranceDeferredProfitLiabilityAmortization
Namespace Prefix:	kmpr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Liability For Future Policy Benefit, Before Reinsurance, Deferred Profit Liability, Effect of Actual Variance From Expected Experience and Change in Assumptions

+ References

No definition available.

+ Details

Name:	kmpr_LiabilityForFuturePolicyBenefitBeforeReinsuranceDeferredProfitLiabilityEffectOfActualVarianceFromExpectedExperienceAndChangeInAssumptions
Namespace Prefix:	kmpr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Liability For Future Policy Benefit, Before Reinsurance, Deferred Profit Liability, Interest Accrued

+ References

No definition available.

+ Details

Name:	kmpr_LiabilityForFuturePolicyBenefitBeforeReinsuranceDeferredProfitLiabilityInterestAccrued
Namespace Prefix:	kmpr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Liability For Future Policy Benefit, Before Reinsurance, Deferred Profit Liability, Profits Deferred

+ References

No definition available.

+ Details

Name:	kmpr_LiabilityForFuturePolicyBenefitBeforeReinsuranceDeferredProfitLiabilityProfitsDeferred
Namespace Prefix:	kmpr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration