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v3.25.1

Short-Duration Insurance Contracts - Schedule of Reinsurance Reserve Balances (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] |  |
Beginning gross reserves | $ 569.2 |
Incurred claims and claim expenses: |  |
Total claims and claim expenses incurred | 16.3 | $ 17.4
Claims and claim expense payments for claims occurring during: |  |
Ending gross reserves | 577.1 |
Property & Casualty |  |
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] |  |
Beginning gross reserves | 420.6 | 416.8
Less: reinsurance recoverables | 100.8 | 104.0
Net reserves, beginning of period | 319.8 | 312.8
Incurred claims and claim expenses: |  |
Claims occurring in the current period | 123.7 | 124.7
Increase (decrease) in estimated reserves for claims occurring in prior periods | (5.3) | 0.0
Total claims and claim expenses incurred | 118.4 | 124.7
Claims and claim expense payments for claims occurring during: |  |
Current period | 50.0 | 44.6
Prior periods | 69.8 | 78.3
Total claims and claim expense payments | 119.8 | 122.9
Net reserves, end of period | 318.4 | 314.6
Plus: reinsurance recoverables | 98.3 | 103.6
Ending gross reserves | 416.7 | 418.2
Group Benefits |  |
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] |  |
Beginning gross reserves | 104.9 | 116.6
Less: reinsurance recoverables | 25.2 | 27.7
Net reserves, beginning of period | 79.7 | 88.9
Incurred claims and claim expenses: |  |
Claims occurring in the current period | 18.3 | 20.2
Increase (decrease) in estimated reserves for claims occurring in prior periods | 0.4 | (6.1)
Total claims and claim expenses incurred | 18.7 | 14.1
Claims and claim expense payments for claims occurring during: |  |
Current period | 3.8 | 3.9
Prior periods | 11.6 | 12.4
Total claims and claim expense payments | 15.4 | 16.3
Net reserves, end of period | 83.1 | 86.7
Plus: reinsurance recoverables | 25.9 | 27.6
Ending gross reserves | $ 109.0 | $ 114.3

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- Definition The amount needed to reflect the estimated ultimate cost of settling claims relating to insured events that have occurred on or before the balance sheet date, whether or not reported to the insurer at that date. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480046/944-40-55-7 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 9E -Publisher FASB -URI https://asc.fasb.org/1943274/2147480046/944-40-55-9E Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (cc) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-3 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(13)(a)(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
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- Definition Amount, after effects of reinsurance, of payments to settle claims incurred in the current period and related claims settlement costs. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480046/944-40-55-7 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-3 + Details
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- Definition Liability as of the balance sheet date for amounts representing estimated cost of settling unpaid claims under the terms of the underlying insurance policies, less estimated reinsurance recoveries on such claims. This includes an estimate for claims which have been incurred but not reported. Claim adjustment expenses represent the costs estimated to be incurred in the settlement of unpaid claims. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(13)(a)(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (cc) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-3 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-3 + Details
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