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v3.21.2

Premiums Receivable - Rollforward of Premiums Receivable and Agents' Balances (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Premium Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Premium Receivable, Allowance for Credit Loss | $ (144) | $ (139) | $ (152) | $ (145)
Premium Receivable, Credit Loss Expense (Reversal) | 2 | 51 | 7 | 81
Premium Receivable, Allowance for Credit Loss, Writeoff | (15) | (8) | (30) | (23)
Premium Receivable, Allowance for Credit Loss, Recovery | 3 | 1 | 5 | 3
Premium Receivable, Allowance for Credit Loss | (134) | (183) | (134) | (183)
Premiums Receivable, Due in One Year or Less, Excluding Receivables for Loss within a Deductible and Retrospectively-Rated Policy Premiums [Member] |  |  |  |
Premium Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Premium Receivable, Allowance for Credit Loss | (108) | (98) | (117) | (85)
Premium Receivable, Credit Loss Expense (Reversal) | 1 | 48 | 5 | 76
Premium Receivable, Allowance for Credit Loss, Writeoff | (15) | (8) | (30) | (23)
Premium Receivable, Allowance for Credit Loss, Recovery | 3 | 1 | 5 | 3
Premium Receivable, Allowance for Credit Loss | (97) | (139) | (97) | (139)
Premiums Receivable, Loss Within a Deductible and Retrospectively-Rated Policy Premiums [Member] |  |  |  |
Premium Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Premium Receivable, Allowance for Credit Loss | (36) | (41) | (35) | (60)
Premium Receivable, Credit Loss Expense (Reversal) | 1 | 3 | 2 | 5
Premium Receivable, Allowance for Credit Loss, Writeoff | 0 | 0 | 0 | 0
Premium Receivable, Allowance for Credit Loss, Recovery | 0 | 0 | 0 | 0
Premium Receivable, Allowance for Credit Loss | $ (37) | $ (44) | $ (37) | (44)
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] | Premiums Receivable [Member] |  |  |  |
Premium Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Premium Receivable, Allowance for Credit Loss |  |  |  | 23
Cumulative Effect, Period of Adoption, Adjustment [Member] | Premiums Receivable, Due in One Year or Less, Excluding Receivables for Loss within a Deductible and Retrospectively-Rated Policy Premiums [Member] | Accounting Standards Update 2016-13 [Member] | Premiums Receivable [Member] |  |  |  |
Premium Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Premium Receivable, Allowance for Credit Loss |  |  |  | 2
Cumulative Effect, Period of Adoption, Adjustment [Member] | Premiums Receivable, Loss Within a Deductible and Retrospectively-Rated Policy Premiums [Member] | Accounting Standards Update 2016-13 [Member] | Premiums Receivable [Member] |  |  |  |
Premium Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Premium Receivable, Allowance for Credit Loss |  |  |  | 21
Cumulative Effect, Period of Adoption, Adjusted Balance [Member] |  |  |  |
Premium Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Premium Receivable, Allowance for Credit Loss |  |  |  | (122)
Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Premiums Receivable, Due in One Year or Less, Excluding Receivables for Loss within a Deductible and Retrospectively-Rated Policy Premiums [Member] |  |  |  |
Premium Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Premium Receivable, Allowance for Credit Loss |  |  |  | (83)
Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Premiums Receivable, Loss Within a Deductible and Retrospectively-Rated Policy Premiums [Member] |  |  |  |
Premium Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Premium Receivable, Allowance for Credit Loss |  |  |  | $ (39)

X
- Definition Amount of expense (reversal of expense) for expected credit loss on premium receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 + 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://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(5)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5074-111524 + Details
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- Definition Amount of increase in allowance for credit loss on premium receivable from recovery. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of writeoff of premium receivable, charged against allowance for credit loss. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 + Details
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