Customer Financing (Schedule Of Customer Financing) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
Customer Financing [Abstract]
Investment in sales-type/finance leases	$ 919
Net Investment in Direct Financing and Sales Type Leases	919		$ 1,029
Notes	420		443
Total financing receivables	1,339		1,472
Operating lease equipment, at cost, less accumulated depreciation of $209 and $235	715		834
Operating lease equipment, accumulated depreciation	209		235
Gross customer financing	2,054		2,306
Less allowance for losses on receivables	(17)	$ (5)	(8)
Total	$ 2,037		$ 2,298