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.