| **Financial Instruments and Commodity Contracts - Income Statement Location (Details) (USD $)In Millions, unless otherwise specified** | 3 Months Ended | 9 Months Ended |
|----------------------------------------------------------------------------------------------------------------------------------------|----------------|----------------|
||
| **Derivative Instruments, Gain (Loss) [Line Items]**                                                                                   |           |           |   |   |
| Derivative Instruments, Gain (Loss) Recognized in Income, Net                                                                          | $ 2            | $ (6)          | $ 4 | $ (6) |
| Cross currency swaps | Other Income Expense Net [Member]                                                                               |           |           |   |   |
| **Derivative Instruments, Gain (Loss) [Line Items]**                                                                                   |           |           |   |   |
| Derivative Instruments, Gain (Loss) Recognized in Income, Net                                                                          | 1              | (1)            | 1 | (1) |
| Interest Rate Cap [Member] | Interest Expense [Member]                                                                                 |           |           |   |   |
| **Derivative Instruments, Gain (Loss) [Line Items]**                                                                                   |           |           |   |   |
| Derivative Instruments, Gain (Loss) Recognized in Income, Net                                                                          | 1              | 0              | 2 | 0 |
| Foreign currency contracts | Other Income Expense Net [Member]                                                                         |           |           |   |   |
| **Derivative Instruments, Gain (Loss) [Line Items]**                                                                                   |           |           |   |   |
| Derivative Instruments, Gain (Loss) Recognized in Income, Net                                                                          | 1              | (4)            | 2 | (6) |
| Forward Contracts [Member] | Commodity Contract [Member] | Cost of Sales [Member]                                                      |           |           |   |   |
| **Derivative Instruments, Gain (Loss) [Line Items]**                                                                                   |           |           |   |   |
| Derivative Instruments, Gain (Loss) Recognized in Income, Net                                                                          | $ 1            | $ 1            | $ 1 | $ (1) |

| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5618551-113959Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a),(c),(d),(e) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959
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| X                                                                                                                                                                          |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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