Customer Financing (Schedule Of Customer Financing) (Details) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Customer Financing [Abstract]
Investment in sales-type/finance leases	$ 1,576	$ 1,620
Notes	293	256
Total financing receivables	1,869	1,876
Operating lease equipment, at cost, less accumulated depreciation of $328 and $338	1,383	1,710
Gross customer financing	3,252	3,586
Less allowance for losses on receivables	(14)	(16)
Total	3,238	3,570
Operating lease equipment- Accumulated depreciation	$ 328	$ 338