XML 94 R70.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Property and Casualty Insurance Reserves Short-duration Insurance Contracts, Claims Development (Details) $ in Millions | Dec. 31, 2016 USD ($) claim | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($) | Dec. 31, 2012 USD ($)
--- | --- | --- | --- | --- | ---
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net | $ 807.5 |  |  |  |
Preferred Personal Automobile Liability Insurance [Member] |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net, Not Separately Presented | 10.9 |  |  |  |
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net | 219.3 |  |  |  |
Preferred Personal Automobile Physical Damage Insurance [Member] |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net, Not Separately Presented | (0.1) |  |  |  |
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net | 0.8 |  |  |  |
Non-standard Personal Automobile Physical Damage Insurance [Member] |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net, Not Separately Presented | 0.0 |  |  |  |
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net | 9.3 |  |  |  |
Non-standard Personal Automobile Liability Insurance [Member] |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net, Not Separately Presented | 1.5 |  |  |  |
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net | 371.7 |  |  |  |
Homeowners [Member] |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net, Not Separately Presented | 3.5 |  |  |  |
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net | 81.7 |  |  |  |
Short-duration Insurance Contracts, Accident Year 2012 [Member] | Preferred Personal Automobile Liability Insurance [Member] |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 282.1 | $ 282.2 | $ 284.4 | $ 290.9 | $ 305.0
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ (0.8) |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | claim | 56,772 |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 272.9 | 264.3 | 245.5 | 207.6 | 117.8
Short-duration Insurance Contracts, Accident Year 2012 [Member] | Preferred Personal Automobile Physical Damage Insurance [Member] |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 164.3 | 164.2 | 164.1 | 163.9 | 163.9
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 0.1 |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | claim | 89,703 |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 164.3 | 164.2 | 164.2 | 164.4 | 160.5
Short-duration Insurance Contracts, Accident Year 2012 [Member] | Non-standard Personal Automobile Physical Damage Insurance [Member] |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 98.2 | 98.3 | 98.4 | 98.1 | 96.4
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 0.0 |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | claim | 35,840 |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 98.2 | 98.2 | 98.2 | 98.3 | 91.2
Short-duration Insurance Contracts, Accident Year 2012 [Member] | Non-standard Personal Automobile Liability Insurance [Member] |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 244.0 | 243.0 | 242.0 | 242.1 | 243.0
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ (0.2) |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | claim | 63,019 |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 242.6 | 238.9 | 228.9 | 202.6 | 112.8
Short-duration Insurance Contracts, Accident Year 2012 [Member] | Homeowners [Member] |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 226.7 | 227.5 | 231.0 | 235.9 | 250.2
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 0.1 |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | claim | 27,833 |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 225.8 | 225.2 | 222.3 | 216.0 | $ 165.9
Short-duration Insurance Contracts, Accident Year 2013 [Member] | Preferred Personal Automobile Liability Insurance [Member] |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 251.6 | 250.1 | 251.1 | 265.4 |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 0.0 |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | claim | 51,126 |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 234.1 | 216.3 | 182.2 | 107.2 |
Short-duration Insurance Contracts, Accident Year 2013 [Member] | Preferred Personal Automobile Physical Damage Insurance [Member] |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 138.4 | 138.5 | 138.5 | 139.7 |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 0.1 |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | claim | 78,779 |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 138.5 | 138.6 | 138.9 | 137.0 |
Short-duration Insurance Contracts, Accident Year 2013 [Member] | Non-standard Personal Automobile Physical Damage Insurance [Member] |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 99.8 | 100.0 | 100.3 | 100.1 |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ (0.1) |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | claim | 36,179 |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 99.7 | 99.9 | 100.2 | 93.4 |
Short-duration Insurance Contracts, Accident Year 2013 [Member] | Non-standard Personal Automobile Liability Insurance [Member] |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 249.5 | 248.3 | 247.1 | 250.5 |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ (0.5) |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | claim | 67,058 |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 244.2 | 233.8 | 208.2 | 117.8 |
Short-duration Insurance Contracts, Accident Year 2013 [Member] | Homeowners [Member] |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 167.5 | 169.4 | 172.8 | 180.8 |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ (0.1) |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | claim | 21,976 |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 164.7 | 162.5 | 156.5 | $ 122.4 |
Short-duration Insurance Contracts, Accident Year 2014 [Member] | Preferred Personal Automobile Liability Insurance [Member] |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 200.2 | 198.3 | 202.1 |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ (0.9) |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | claim | 39,865 |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 168.8 | 143.3 | 85.8 |  |
Short-duration Insurance Contracts, Accident Year 2014 [Member] | Preferred Personal Automobile Physical Damage Insurance [Member] |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 121.4 | 121.6 | 122.0 |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 0.1 |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | claim | 67,205 |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 121.5 | 121.8 | 121.0 |  |
Short-duration Insurance Contracts, Accident Year 2014 [Member] | Non-standard Personal Automobile Physical Damage Insurance [Member] |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 104.3 | 104.7 | 105.8 |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ (0.7) |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | claim | 38,042 |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 105.1 | 105.9 | 97.1 |  |
Short-duration Insurance Contracts, Accident Year 2014 [Member] | Non-standard Personal Automobile Liability Insurance [Member] |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 267.1 | 262.9 | 255.0 |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ (5.4) |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | claim | 76,846 |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 245.5 | 210.8 | 117.4 |  |
Short-duration Insurance Contracts, Accident Year 2014 [Member] | Homeowners [Member] |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 205.0 | 208.5 | 211.1 |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ (0.1) |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | claim | 22,432 |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 200.1 | 194.4 | $ 149.2 |  |
Short-duration Insurance Contracts, Accident Year 2015 [Member] | Preferred Personal Automobile Liability Insurance [Member] |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 171.8 | 168.3 |  |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ (6.3) |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | claim | 32,484 |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 122.4 | 73.1 |  |  |
Short-duration Insurance Contracts, Accident Year 2015 [Member] | Preferred Personal Automobile Physical Damage Insurance [Member] |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 100.7 | 101.2 |  |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 0.4 |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | claim | 53,419 |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 101.0 | 100.1 |  |  |
Short-duration Insurance Contracts, Accident Year 2015 [Member] | Non-standard Personal Automobile Physical Damage Insurance [Member] |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 143.3 | 143.2 |  |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ (1.6) |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | claim | 42,863 |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 143.8 | 130.0 |  |  |
Short-duration Insurance Contracts, Accident Year 2015 [Member] | Non-standard Personal Automobile Liability Insurance [Member] |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 379.8 | 379.4 |  |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ (10.4) |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | claim | 91,832 |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 304.7 | 167.7 |  |  |
Short-duration Insurance Contracts, Accident Year 2015 [Member] | Homeowners [Member] |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 164.9 | 178.9 |  |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ (1.8) |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | claim | 17,432 |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 154.4 | $ 116.9 |  |  |
Short-duration Insurance Contracts, Accident Year 2016 [Member] | Preferred Personal Automobile Liability Insurance [Member] |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 162.1 |  |  |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ (26.9) |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | claim | 30,278 |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 61.2 |  |  |  |
Short-duration Insurance Contracts, Accident Year 2016 [Member] | Preferred Personal Automobile Physical Damage Insurance [Member] |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 106.6 |  |  |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 4.2 |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | claim | 49,267 |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 105.2 |  |  |  |
Short-duration Insurance Contracts, Accident Year 2016 [Member] | Non-standard Personal Automobile Physical Damage Insurance [Member] |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 177.9 |  |  |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ (4.0) |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | claim | 52,039 |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 167.4 |  |  |  |
Short-duration Insurance Contracts, Accident Year 2016 [Member] | Non-standard Personal Automobile Liability Insurance [Member] |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 435.7 |  |  |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ (72.2) |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | claim | 108,062 |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 168.9 |  |  |  |
Short-duration Insurance Contracts, Accident Year 2016 [Member] | Homeowners [Member] |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 200.3 |  |  |  |
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 9.7 |  |  |  |
Short-duration Insurance Contracts, Number of Reported Claims | claim | 16,769 |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 141.2 |  |  |  |
Short-Duration Insurance Contracts, Accident Years 2012 through 2016 [Member] | Preferred Personal Automobile Liability Insurance [Member] |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 1,067.8 |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | 859.4 |  |  |  |
Short-Duration Insurance Contracts, Accident Years 2012 through 2016 [Member] | Preferred Personal Automobile Physical Damage Insurance [Member] |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 631.4 |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | 630.5 |  |  |  |
Short-Duration Insurance Contracts, Accident Years 2012 through 2016 [Member] | Non-standard Personal Automobile Physical Damage Insurance [Member] |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 623.5 |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | 614.2 |  |  |  |
Short-Duration Insurance Contracts, Accident Years 2012 through 2016 [Member] | Non-standard Personal Automobile Liability Insurance [Member] |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 1,576.1 |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | 1,205.9 |  |  |  |
Short-Duration Insurance Contracts, Accident Years 2012 through 2016 [Member] | Homeowners [Member] |  |  |  |  |
Claims Development [Line Items] |  |  |  |  |
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 964.4 |  |  |  |
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 886.2 |  |  |  |

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ClaimsDevelopmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, after reinsurance, of paid claims and allocated claim adjustment expense used in claims development for short-duration insurance contracts. Excludes unallocated claim adjustment expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 4B -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=65670685&loc=SL65671311-158438 + Details
Name: | us-gaap_ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Undiscounted amount, after reinsurance, of incurred-but-not-reported (IBNR) liabilities plus expected development on reported claims, for claims and allocated claim adjustment expense for short-duration insurance contracts. Excludes unallocated claim adjustment expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 4D -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=65670685&loc=SL65671317-158438 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 4E -URI http://asc.fasb.org/extlink&oid=65670685&loc=SL65671321-158438 + Details
Name: | us-gaap_ShortdurationInsuranceContractsIncurredButNotReportedIbnrClaimsLiabilityNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Undiscounted amount, after reinsurance, of incurred claims and allocated claim adjustment expense used in claims development for short-duration insurance contracts. Excludes unallocated claim adjustment expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 4B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=65670685&loc=SL65671311-158438 + Details
Name: | us-gaap_ShortdurationInsuranceContractsIncurredClaimsAndAllocatedClaimAdjustmentExpenseNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Undiscounted amount, after reinsurance, of the liability for unpaid claims and allocated claim adjustment expense for short-duration insurance contracts. Excludes unallocated claim adjustment expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=65670685&loc=SL65671311-158438 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=65670685&loc=SL65671315-158438 + Details
Name: | us-gaap_ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndAllocatedClaimAdjustmentExpenseNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Undiscounted amount, after reinsurance, of the liability for unpaid claims and allocated claim adjustment expense for short-duration insurance contracts for accident years not separately presented in claim development information. Excludes unallocated claim adjustment expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=65670685&loc=SL65671311-158438 + Details
Name: | us-gaap_ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndAllocatedClaimAdjustmentExpenseNetNotSeparatelyPresented
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Number of reported claims for short-duration insurance contracts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 4D -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=65670685&loc=SL65671317-158438 + Details
Name: | us-gaap_ShortdurationInsuranceContractsNumberOfReportedClaims
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_ProductOrServiceAxis=kmpr_PreferredPersonalAutomobileLiabilityInsuranceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ProductOrServiceAxis=kmpr_PreferredPersonalAutomobilePhysicalDamageInsuranceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ProductOrServiceAxis=kmpr_NonstandardPersonalAutomobilePhysicalDamageInsuranceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ProductOrServiceAxis=kmpr_NonstandardPersonalAutomobileLiabilityInsuranceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ProductOrServiceAxis=kmpr_HomeownersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShortdurationInsuranceContractsAccidentYearAxis=us-gaap_ShortdurationInsuranceContractsAccidentYear2012Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShortdurationInsuranceContractsAccidentYearAxis=us-gaap_ShortdurationInsuranceContractsAccidentYear2013Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShortdurationInsuranceContractsAccidentYearAxis=us-gaap_ShortdurationInsuranceContractsAccidentYear2014Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShortdurationInsuranceContractsAccidentYearAxis=us-gaap_ShortdurationInsuranceContractsAccidentYear2015Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShortdurationInsuranceContractsAccidentYearAxis=us-gaap_ShortdurationInsuranceContractsAccidentYear2016Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShortdurationInsuranceContractsAccidentYearAxis=kmpr_ShortDurationInsuranceContractsAccidentYears2012through2016Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |