| **Revenue - Performance Obligations (Details) - USD ($) $ in Millions**                                   | 3 Months Ended | 9 Months Ended |
|-----------------------------------------------------------------------------------------------------------|----------------|----------------|
||
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-02-01 |           |           |   |   |
| **Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]**               |           |           |   |   |
| Expected revenue                                                                                          | $ 23           |           | $ 23 |   |
| Expected revenue, period                                                                                  | 9 months       |           | 9 months |   |
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-11-01 |           |           |   |   |
| **Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]**               |           |           |   |   |
| Expected revenue                                                                                          | $ 82           |           | $ 82 |   |
| Expected revenue, period                                                                                  | 1 year         |           | 1 year |   |
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-11-01 |           |           |   |   |
| **Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]**               |           |           |   |   |
| Expected revenue                                                                                          | $ 68           |           | $ 68 |   |
| Expected revenue, period                                                                                  | 1 year         |           | 1 year |   |
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-11-01 |           |           |   |   |
| **Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]**               |           |           |   |   |
| Expected revenue                                                                                          | $ 47           |           | $ 47 |   |
| Expected revenue, period                                                                                  | 1 year         |           | 1 year |   |
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-11-01 |           |           |   |   |
| **Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]**               |           |           |   |   |
| Expected revenue                                                                                          | $ 26           |           | $ 26 |   |
| Expected revenue, period                                                                                  | 1 year         |           | 1 year |   |
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-11-01 |           |           |   |   |
| **Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]**               |           |           |   |   |
| Expected revenue                                                                                          | $ 27           |           | $ 27 |   |
| Expected revenue, period                                                                                  | 1 year         |           | 1 year |   |
| Extended Warranty Programs [Member]                                                                       |           |           |   |   |
| **Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]**               |           |           |   |   |
| Revenue from Contract with Customer, Including Assessed Tax                                               | $ 27           | $ 24           | $ 85 | $ 80 |

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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.
+ References
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of transaction price allocated to performance obligation that has not been recognized as revenue.
+ References
Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130556-203045
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| - Definition
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
+ References
No definition available.
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| - Definition
Period in which remaining performance obligation is expected to be recognized as revenue, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.
+ References
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