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Reinsurance (Reinsurance Amounts Recorded on Consolidated Statements of Income (Loss)) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Reinsurance [Abstract] |  |  |
Direct insurance premiums and fee income | $ 13,607 | $ 13,415 | $ 13,304
Reinsurance assumed | 98 | 94 | 95
Reinsurance ceded | (2,015) | (1,853) | (1,656)
Total insurance premiums and fee income | 11,690 | 11,656 | 11,743
Direct insurance benefits | 10,345 | 10,592 | 10,630
Reinsurance recoveries | (1,866) | (2,089) | (1,953)
Benefits | 8,479 | 8,503 | $ 8,677
Direct market risk benefit (gain) loss | (3,517) | (4,011) |
Reinsurance ceded | 271 | 258 |
Total market risk benefit (gain) loss | (3,246) | (3,753) |
Direct Policyholder Liability Remeasurement Benefit (Gain) Loss | 3,294 | (162) |
Reinsurance ceded | (528) | (21) |
Total policyholder liability remeasurement benefit (gain) loss | $ 2,766 | $ (183) |

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- Definition Amount of written 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 (b)(2) -URI https://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547 + 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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- Definition Amount of gain (loss) from (increase) decrease in fair value of contract or contract feature in long-duration contract issued by insurance entity that both protects contract holder from other-than-nominal capital market risk and exposes insurance entity to other-than-nominal capital market risk. Excludes change attributable to instrument-specific credit risk. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 45 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=124509262&loc=SL117780254-158436 + Details
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