Customer Financing (Schedule Of Customer Financing) (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Customer Financing [Abstract]
Investment in sales-type/finance leases	$ 1,265	$ 1,364
Notes	934	1,022
Total financing receivables	2,199	2,386
Operating lease equipment, at cost, less accumulated depreciation of $286 and $305	808	691
Gross customer financing	3,007	3,077
Less allowance for losses on receivables	(10)	(12)
Total	2,997	3,065
Operating lease equipment- Accumulated depreciation	$ 286	$ 305

Customer Financing [Abstract]

No definition available.

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- Definition

The total current and non-current portion of notes receivable, investment in sales-type/finance leases, operating lease equipment, less accumulated depreciation, less allowance for losses on receivables.

+ References

No definition available.

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- Definition

The aggregate sum of financing receivables from investments in sales-type/finance leases, notes and operating lease equipment, at cost less accumulated depreciation, before the allowance for losses on the receivables.

+ References

No definition available.

+ Details

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- Definition

Includes outstanding notes receivable and the net amount due as of the balance sheet date on direct financing and sales-type leases. Represents an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date.

+ References

No definition available.

+ Details

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- Definition

A valuation allowance for financing receivables that are expected to be uncollectible.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

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- Definition

The net amount due as of the balance sheet date consisting of: (a) minimum lease payments due on direct financing and sales-type leases, (b) unguaranteed residual value, and (c) any unamortized initial direct costs on direct financing leases; less: (i) executory costs, (ii) unearned income, and (iii) the accumulated allowance for uncollectible minimum lease payments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 30
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=84165051&loc=d3e45377-112738

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- Definition

Amount representing an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date. Such amount may include accrued interest receivable in accordance with the terms of the note. The note also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. Excludes amounts related to receivables held-for-sale.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.10(3))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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- Definition

The amount of accumulated depreciation, by major property class, recorded on property subject to or available for lease as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=84164653&loc=d3e41551-112718

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=77907726&loc=d3e41460-112716

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- Definition

The amount of property, by major property class, net of accumulated depreciation, subject to or available for lease as of the balance sheet date.

+ References

+ Details

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