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Receivables from Policyholders - Allowance for Expected Credit Losses (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Premium Receivable, Allowance for Credit Loss [Roll Forward] |  |
Balance at Beginning of Year | $ 13.9 | $ 13.1
Provision for Expected Credit Losses | 39.6 | 41.6
Write-offs of Uncollectible Receivables from Policyholders | (50.6) | (40.8)
Balance at End of Year | 2.9 | 13.9
Receivable Balance at End of Year | 986.1 | 960.2
Receivable Balance | 977.9 | 959.5
Variable Interest Entity, Primary Beneficiary |  |
Premium Receivable, Allowance for Credit Loss [Roll Forward] |  |
Balance at Beginning of Year | 0.0 |
Balance at End of Year | 0.0 | 0.0
Receivable Balance | 8.2 | 0.7
Operating Segments |  |
Premium Receivable, Allowance for Credit Loss [Roll Forward] |  |
Balance at Beginning of Year | 12.9 | 12.3
Provision for Expected Credit Losses | 39.2 | 39.8
Write-offs of Uncollectible Receivables from Policyholders | (49.5) | (39.2)
Balance at End of Year | 2.6 | 12.9
Receivable Balance at End of Year | 973.9 | 886.7
Non-Core Operations |  |
Premium Receivable, Allowance for Credit Loss [Roll Forward] |  |
Balance at Beginning of Year | 1.0 | 0.8
Provision for Expected Credit Losses | 0.4 | 1.8
Write-offs of Uncollectible Receivables from Policyholders | (1.1) | (1.6)
Balance at End of Year | 0.3 | 1.0
Receivable Balance at End of Year | 12.2 | 73.5
Specialty | Operating Segments |  |
Premium Receivable, Allowance for Credit Loss [Roll Forward] |  |
Balance at Beginning of Year | 12.9 | 12.3
Provision for Expected Credit Losses | 38.9 | 39.3
Write-offs of Uncollectible Receivables from Policyholders | (49.2) | (38.7)
Balance at End of Year | 2.6 | 12.9
Receivable Balance at End of Year | 962.8 | 875.4
Life | Operating Segments |  |
Premium Receivable, Allowance for Credit Loss [Roll Forward] |  |
Balance at Beginning of Year | 0.0 | 0.0
Provision for Expected Credit Losses | 0.3 | 0.5
Write-offs of Uncollectible Receivables from Policyholders | (0.3) | (0.5)
Balance at End of Year | 0.0 | 0.0
Receivable Balance at End of Year | $ 11.1 | $ 11.3

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- Definition Amount of expense (reversal of expense) for expected credit loss on premium receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 + Details
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- Definition The carrying value as of the balance sheet date of the estimated valuation allowance to reduce gross premiums receivable to net realizable value. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-11B Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-4 Reference 3: 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)(5)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 + Details
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