Long-Term Investments (Schedule Of Net Investment In Leveraged Leases) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Schedule of Investments [Line Items]
Provision for Loan and Lease Losses	$ 9	$ 26	$ 58
Assets Held for Sale	$ 2,060	0
Maximum U.S. Corporate Income Tax Rate	21.00%
Lease Receivables (net of Non-Recourse Debt)	$ 274	299
Estimated Residual Value of Leased Assets	0	55
Total Investment in Rental Receivables	274	354
Unearned and Deferred Income	(87)	(104)
Gross Investment in Leases	187	250
Deferred Tax Liabilities	(42)	(64)
Net Investments in Leases	$ 145	$ 186