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Condensed Financial Information (Parent Company) (Investment in Subsidiaries - Narrative) (Details) - USD ($) $ in Billions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Metropolitan Property And Casualty Insurance Company [Member] |  |
Condensed Financial Statements, Captions [Line Items] |  |
Sales of businesses | $ 3.9 | $ 3.9

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- Definition The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-12 + Details
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