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Reinsurance (Reinsurance Amounts Recorded on Consolidated Statements of Income (Loss)) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Reinsurance [Abstract] |  |  |
Direct insurance premiums and fee income | $ 13,498 | $ 12,041 | $ 10,269
Reinsurance assumed | 91 | 89 | 91
Reinsurance ceded | (1,579) | (1,543) | (1,485)
Total insurance premiums and fee income | 12,010 | 10,587 | 8,875
Direct insurance benefits | 9,574 | 8,592 | 6,770
Reinsurance recoveries netted against benefits | (1,694) | (1,806) | (1,610)
Benefits | $ 7,880 | $ 6,786 | $ 5,160

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- Definition Amount, before premiums ceded to other entities and premiums assumed by the entity, of premiums written. + 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)(1) -URI http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547 + Details
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- Definition Amount, before effect of policies assumed or ceded, of expense related to provision for policy benefits and costs incurred. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.5) -URI http://asc.fasb.org/extlink&oid=116637232&loc=SL114874131-224263 + Details
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