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Investments (Schedule Of Other Investments) (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Other Investment Not Readily Marketable [Line Items] |  |  |
Other Investments |  | $ 13,696 | $ 11,169
Alternative Investment |  | 12,355 | 10,108
Estimate of Fair Value Measurement [Member] |  |  |
Other Investment Not Readily Marketable [Line Items] |  |  |
Other Investments |  | 13,696 | 11,169
Alternative Investment |  | 12,355 | 10,108
Partially-owned Investment Companies | Equity Method Investments [Member] | Estimate of Fair Value Measurement [Member] |  |  |
Other Investment Not Readily Marketable [Line Items] |  |  |
Other Investments |  | 10,527 | 9,210
Limited Partner [Member] | Cost-method Investments [Member] | Estimate of Fair Value Measurement [Member] |  |  |
Other Investment Not Readily Marketable [Line Items] |  |  |
Other Investments |  | 1,455 | 631
Investment Funds [Member] | Cost-method Investments [Member] | Estimate of Fair Value Measurement [Member] |  |  |
Other Investment Not Readily Marketable [Line Items] |  |  |
Other Investments |  | 373 | 267
Life [Member] | Other Accounting Method [Member] | Estimate of Fair Value Measurement [Member] |  |  |
Other Investment Not Readily Marketable [Line Items] |  |  |
Other Investments |  | 399 | 481
Policy Loans [Member] | Other Accounting Method [Member] | Estimate of Fair Value Measurement [Member] |  |  |
Other Investment Not Readily Marketable [Line Items] |  |  |
Other Investments |  | 343 | 243
Non-qualified separate account assets [Member] | Other Accounting Method [Member] | Estimate of Fair Value Measurement [Member] |  |  |
Other Investment Not Readily Marketable [Line Items] |  |  |
Other Investments | [1] | 223 | 278
Other [Member] | Other Accounting Method [Member] | Estimate of Fair Value Measurement [Member] |  |  |
Other Investment Not Readily Marketable [Line Items] |  |  |
Other Investments |  | $ 376 | $ 59
[1] | Non-qualified separate account assets are comprised of mutual funds, supported by assets that do not qualify for separate account reporting under GAAP.

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- Definition Fair value of investment other than investment in equity security, investment in debt security and equity method investment. Includes, but is not limited to, investment in certain entities that calculate net asset value per share. Example includes, but is not limited to, investment in hedge fund, venture capital fund, private equity fund, and real estate partnership or fund. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 6A -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126976982&loc=SL6742756-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 35 -Paragraph 54B -URI https://asc.fasb.org/extlink&oid=126972413&loc=SL7495116-110257 + Details
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