Finance Receivables, Net - Finance Receivables and Maturities (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, after Allowance for Credit Loss [Abstract]
Gross receivables	$ 3,568	$ 3,691
Unearned income	(380)	(393)
Subtotal	3,188	3,298
Residual values	0	0
Allowance for doubtful accounts	(118)	(133)	$ (89)
Finance Receivables, Net	3,070	3,165
Less: Billed portion of finance receivables, net	94	99
Less: Current portion of finance receivables not billed, net	1,042	1,082
Finance receivables due after one year, net	1,934	1,984
12 Months	1,357	1,426
24 Months	972	1,006
36 Months	668	697
48 Months	396	395
60 Months	157	152
Thereafter	18	15
Total	$ 3,568	$ 3,691

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.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.3(c))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 912
-SubTopic 310
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=123371682&loc=d3e55302-109406