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Schedule IV (SUPPLEMENTAL INFORMATION CONCERNING REINSURANCE) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] |  |  |
Direct Amount | $ 41,138 | $ 37,037 | $ 35,876
Ceded To Other Companies | 8,433 | 7,243 | 7,693
Assumed From Other Companies | 3,650 | 3,323 | 3,107
Net Amount | $ 36,355 | $ 33,117 | $ 31,290
Percentage of Amount Assumed to Net | 10.00% | 10.00% | 10.00%
Property and Casualty [Member] |  |  |
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] |  |  |
Direct Amount | $ 35,767 | $ 31,546 | $ 30,339
Ceded To Other Companies | 7,982 | 6,782 | 7,236
Assumed From Other Companies | 3,441 | 3,044 | 2,797
Net Amount | $ 31,226 | $ 27,808 | $ 25,900
Percentage of Amount Assumed to Net | 11.00% | 11.00% | 11.00%
Accident and Health [Member] |  |  |
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] |  |  |
Direct Amount | $ 4,062 | $ 4,249 | $ 4,546
Ceded To Other Companies | 362 | 368 | 376
Assumed From Other Companies | 109 | 111 | 119
Net Amount | $ 3,809 | $ 3,992 | $ 4,289
Percentage of Amount Assumed to Net | 3.00% | 3.00% | 3.00%
Life [Member] |  |  |
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] |  |  |
Direct Amount | $ 1,309 | $ 1,242 | $ 991
Ceded To Other Companies | 89 | 93 | 81
Assumed From Other Companies | 100 | 168 | 191
Net Amount | $ 1,320 | $ 1,317 | $ 1,101
Percentage of Amount Assumed to Net | 8.00% | 13.00% | 17.00%

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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 http://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 http://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 http://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 http://asc.fasb.org/extlink&oid=120401096&loc=d3e574992-122915 + Details
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