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v3.23.1

REINSURANCE - Effect of Reinsurance on Premiums and Benefits and Claims (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Dec. 31, 2022
Effects of Reinsurance [Line Items] |  |  |
Direct premium income | $ 3,738 | $ 4,115 |
Ceded premiums | (104) | (117) |
Net earned premiums | 3,688 | 4,079 |
Direct benefits and claims, excluding reserve remeasurement | 2,256 | 2,334 |
Reserve remeasurement (gains) losses | (53) | (34) | $ (215)
Direct benefits and claims | 2,203 | 2,300 |
Benefits and claims, net | 2,150 | 2,483 |
Intercompany eliminations |  |  |
Effects of Reinsurance [Line Items] |  |  |
Ceded benefits and claims | 14 | 5 |
Assumed benefits and claims from other companies | 10 | (5) |
All other |  |  |
Effects of Reinsurance [Line Items] |  |  |
Ceded premiums | (25) | (19) |
Assumed premiums earned | 23 | 40 |
Ceded benefits and claims | (18) | (5) |
Assumed benefits and claims from other companies | 36 | 239 |
Aflac Japan |  |  |
Effects of Reinsurance [Line Items] |  |  |
Net earned premiums | 2,170 | 2,625 |
Aflac Japan | Closed Block |  |  |
Effects of Reinsurance [Line Items] |  |  |
Ceded premiums | (82) | (98) |
Assumed premiums earned | 34 | 41 |
Ceded benefits and claims | (100) | (88) |
Assumed benefits and claims from other companies | $ 5 | $ 37 |

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- Definition Amount of earned premiums assumed from other entities. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 605 -Section 50 -Paragraph 1 -Subparagraph (c)(2) -URI https://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(1)) -URI https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 605 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI https://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 235 -Section S99 -Paragraph 2 -Subparagraph (SX 210.12-17(Column D)) -URI https://asc.fasb.org/extlink&oid=120401096&loc=d3e574992-122915 + Details
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- Definition Amount of remeasurement gain (loss) on liability for future policy benefit from application of revised benefit ratio as of contract issue. Includes, but is not limited to, remeasurement gain (loss) for annuitization insurance benefit, death and other insurance benefits, and traditional and limited-payment contracts. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 45 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=124509262&loc=SL117780257-158436 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=124509262&loc=d3e14722-158436 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124509262&loc=d3e14714-158436 + Details
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