Customer Financing (Schedule Of Customer Financing) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Customer Financing [Abstract]
Sales-type and Direct Financing Leases, Lease Receivable	$ 1,029
Investment in sales-type/finance leases	1,029	$ 1,125
Notes	443	730
Total financing receivables	1,472	1,855
Operating lease equipment, at cost, less accumulated depreciation of $235 and $203	834	782
Operating lease incentive		250
Gross customer financing	2,306	2,887
Less allowance for losses on receivables	(8)	(9)	$ (12)	$ (10)
Total	2,298	2,878
Operating lease equipment, accumulated depreciation	$ 235	$ 203