XML 156 R139.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Subsequent Events (Details) - Infinity [Member] - USD ($) $ / shares in Units, $ in Billions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Jul. 02, 2018
Subsequent Event [Line Items] |  |
Premiums Written, Net | $ 1.4 |
Kemper's 2-12-18 Closing Price per share [Member] |  |
Subsequent Event [Line Items] |  |
Share Price |  | $ 74.53
Total Merger Value |  | $ 1.5

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- Definition Total Merger Value + References No definition available. + Details
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Namespace Prefix: | kmpr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount, after premiums ceded to other entities and premiums assumed by the entity, of premiums written. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 605 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 605 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Price of a single share of a number of saleable stocks of a company. + References No definition available. + Details
Name: | us-gaap_SharePrice
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | kmpr_ExchangeRatioCalculationAxis=kmpr_Kempers21218ClosingPricepershareMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |