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v3.21.1

Reinsurance and indemnification - Claims expense, life contract benefits and interest credited to contractholder funds (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020
Reductions to costs and expenses due to reinsurance ceded amounts |  |  |
Unearned premiums | $ 18,177 |  | $ 15,946
Property and casualty insurance claims and claims expense |  |  |
Reductions to costs and expenses due to reinsurance ceded amounts |  |  |
Ceded losses incurred | (1,593) | $ (131) |
Accident and health insurance policy benefits |  |  |
Reductions to costs and expenses due to reinsurance ceded amounts |  |  |
Ceded losses incurred | (29) | (6) |
Michigan Catastrophic Claim Association | Property and casualty insurance claims and claims expense |  |  |
Reductions to costs and expenses due to reinsurance ceded amounts |  |  |
Ceded losses incurred | 386 | $ 47 |
Nationwide Reinsurance Program |  |  |
Reductions to costs and expenses due to reinsurance ceded amounts |  |  |
Unearned premiums | 75 |  |
Nationwide Reinsurance Program | Property and casualty insurance claims and claims expense |  |  |
Reductions to costs and expenses due to reinsurance ceded amounts |  |  |
Ceded losses incurred | $ 955 |  |

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- Definition Carrying amount of premiums written on insurance contracts that have not been earned as of the balance sheet date. + 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(a)(13)(a)(2)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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