Finance Receivables, Net (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Receivables [Abstract]
Gross receivables	$ 4,683	$ 5,009
Unearned income	(577)	(624)
Subtotal	4,106	4,385
Residual values	0	0
Allowance for doubtful accounts	(118)	(131)	$ (154)
Finance Receivables, Net	3,988	4,254
Less: Billed portion of finance receivables, net	97	110
Less: Current portion of finance receivables not billed, net	1,315	1,425
Finance Receivables Due After One Year, Net	2,576	2,719
Billed Contracts Receivable	102
Finance receivables contractual maturity, current	1,717
Finance receivables contractual maturity, in two years	1,295
Finance receivables contractual maturities, in three years	922
Finance receivables contractual maturities, in four years	530
Finance receivables contractual maturities, in five years	201
Finance receivables contractual maturities, thereafter	18
Total contractual maturities	$ 4,683	$ 5,009

Amounts due for billed services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the Company and, at a minimum, one other party. An example would be amounts billed to customers under contracts or programs but not paid as of the balance sheet date.

Name:	us-gaap_BilledContractReceivables
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 13.A.4(a).Q1 Response)
-URI http://asc.fasb.org/extlink&oid=27012821&loc=d3e214044-122780

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 13
-Section A