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Impairment of Long-Lived Assets (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2016
Impairment of Long Lived Assets [Line Items] |  |  |
Asset Impairment Charges | $ 42 | $ 78 | $ 221
2018 Restructuring Plan [Member] |  |  |
Impairment of Long Lived Assets [Line Items] |  |  |
Asset Impairment Charges | 42 |  |
2018 Restructuring Plan [Member] | Global Products |  |  |
Impairment of Long Lived Assets [Line Items] |  |  |
Asset Impairment Charges | 31 |  |
2018 Restructuring Plan [Member] | Power Solutions |  |  |
Impairment of Long Lived Assets [Line Items] |  |  |
Asset Impairment Charges | 6 |  |
2018 Restructuring Plan [Member] | Corporate |  |  |
Impairment of Long Lived Assets [Line Items] |  |  |
Asset Impairment Charges | $ 5 |  |
2017 Restructuring Plan [Member] |  |  |
Impairment of Long Lived Assets [Line Items] |  |  |
Asset Impairment Charges |  | 77 |
2017 Restructuring Plan [Member] | Building Solutions Asia Pacific |  |  |
Impairment of Long Lived Assets [Line Items] |  |  |
Asset Impairment Charges |  | 1 |
2017 Restructuring Plan [Member] | Building Solutions North America |  |  |
Impairment of Long Lived Assets [Line Items] |  |  |
Asset Impairment Charges |  | 30 |
2017 Restructuring Plan [Member] | Global Products |  |  |
Impairment of Long Lived Assets [Line Items] |  |  |
Asset Impairment Charges |  | 20 |
2017 Restructuring Plan [Member] | Power Solutions |  |  |
Impairment of Long Lived Assets [Line Items] |  |  |
Asset Impairment Charges |  | 7 |
2017 Restructuring Plan [Member] | Corporate |  |  |
Impairment of Long Lived Assets [Line Items] |  |  |
Asset Impairment Charges |  | $ 19 |
2016 Restructuring Plan [Member] |  |  |
Impairment of Long Lived Assets [Line Items] |  |  |
Asset Impairment Charges |  |  | 103
2016 Restructuring Plan [Member] | Building Solutions Asia Pacific |  |  |
Impairment of Long Lived Assets [Line Items] |  |  |
Asset Impairment Charges |  |  | 4
2016 Restructuring Plan [Member] | Building Solutions EMEA/LA |  |  |
Impairment of Long Lived Assets [Line Items] |  |  |
Asset Impairment Charges |  |  | 3
2016 Restructuring Plan [Member] | Global Products |  |  |
Impairment of Long Lived Assets [Line Items] |  |  |
Asset Impairment Charges |  |  | 8
2016 Restructuring Plan [Member] | Power Solutions |  |  |
Impairment of Long Lived Assets [Line Items] |  |  |
Asset Impairment Charges |  |  | 64
2016 Restructuring Plan [Member] | Corporate |  |  |
Impairment of Long Lived Assets [Line Items] |  |  |
Asset Impairment Charges |  |  | 24
2016 Restructuring Plan [Member] | Discontinued Operations | Adient |  |  |
Impairment of Long Lived Assets [Line Items] |  |  |
Asset Impairment Charges |  |  | $ 87

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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2420-110228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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