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Investments (Schedule Of Investments In Partially-Owned Insurance Companies) (Details) - USD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Investment [Line Items] |  |  |
Document Period End Date | Dec. 31, 2021 |  |
Carrying Value | $ 3,130 | $ 2,813 |
Goodwill | 15,213 | 15,400 | $ 15,296
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity | 1,429 | 1,385 |
Huatai Group [Member] | CHINA |  |  |
Investment [Line Items] |  |  |
Carrying Value | $ 2,698 | $ 2,461 |
Ownership Percentage | 47.00% | 47.00% |
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity | $ 1,355 | $ 1,313 |
Huatai Life Insurance Co. [Member] | CHINA |  |  |
Investment [Line Items] |  |  |
Carrying Value | $ 253 | $ 201 |
Ownership Percentage | 20.00% | 20.00% |
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity | $ 71 | $ 69 |
Freisenbruch-Meyer | Bermuda |  |  |
Investment [Line Items] |  |  |
Carrying Value | $ 10 | $ 10 |
Ownership Percentage | 40.00% | 40.00% |
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity | $ 3 | $ 3 |
Chubb Arabia Cooperative Insurance Company [Member] | Saudi Arabia |  |  |
Investment [Line Items] |  |  |
Carrying Value | $ 23 | $ 23 |
Ownership Percentage | 30.00% | 30.00% |
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity | $ 0 | $ 0 |
Russian Reinsurance Company | Russia |  |  |
Investment [Line Items] |  |  |
Carrying Value | $ 4 | $ 4 |
Ownership Percentage | 23.00% | 23.00% |
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity | $ 0 | $ 0 |
ABR Reinsurance Capital Holdings Ltd. [Member] | Bermuda |  |  |
Investment [Line Items] |  |  |
Carrying Value | $ 142 | $ 114 |
Ownership Percentage | 17.10% | 16.00% |
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity | $ 0 | $ 0 |
Direct Ownership [Member] | Huatai Group [Member] | CHINA |  |  |
Investment [Line Items] |  |  |
Ownership Percentage | 47.30% |  |
Direct Ownership [Member] | Huatai Life Insurance Co. [Member] | CHINA |  |  |
Investment [Line Items] |  |  |
Ownership Percentage | 20.00% |  |
Indirect Ownership [Member] | Huatai Life Insurance Co. [Member] | CHINA |  |  |
Investment [Line Items] |  |  |
Ownership Percentage | 37.70% |  |
Total Direct and Indirect [Member] | Huatai Life Insurance Co. [Member] | CHINA |  |  |
Investment [Line Items] |  |  |
Ownership Percentage | 57.70% |  |

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- Definition For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD. + References No definition available. + Details
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