Long-Term Investments (Schedule Of Net Investment In Leveraged Leases) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Schedule of Investments [Line Items]
Assets Held for Sale	$ 0	$ 20
Maximum U.S. Corporate Income Tax Rate	21.00%
Energy Holdings [Member]
Schedule of Investments [Line Items]
Lease Receivables (net of Non-Recourse Debt)	$ 223	249
Leveraged Leases, Net Investment in Leveraged Leases Disclosure, Residual Value of Leased Assets	0	0
Total Investment in Rental Receivables	223	249
Leveraged Leases, Net Investment in Leveraged Leases Disclosure, Deferred Income	62	74
Gross Investment in Leases	161	175
Leveraged Leases, Net Investment in Leveraged Leases Disclosure, Deferred Taxes Arising from Leveraged Leases	36	39
Net Investments in Leases	125	136
Lease Receivables (net of Non-Recourse Debt)	223	249
Estimated Residual Value of Leased Assets	0	0
Total Investment in Rental Receivables	223	249
Unearned and Deferred Income	(62)	(74)
Gross Investment in Leases	161	175
Deferred Tax Liabilities	(36)	(39)
Net Investments in Leases	$ 125	$ 136