Customer Financing (Schedule Of Customer Financing) (Details) - USD ($) $ in Millions	Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
Customer Financing [Abstract]
Sales-type and Direct Financing Leases, Lease Receivable	$ 1,002
Investment in sales-type/finance leases			$ 1,029
Notes	452		443
Total financing receivables	1,454		1,472
Operating lease equipment, at cost, less accumulated depreciation of $231 and $235	816		834
Gross customer financing	2,270		2,306
Less allowance for losses on receivables	(5)	$ (5)	(8)
Total	2,265		2,298
Operating lease equipment- Accumulated depreciation	$ 231		$ 235