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Significant Restructuring Costs Changes in Restructuring Reserve - 2016 Restructuring Plan (Tables) | 6 Months Ended
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Mar. 31, 2018
2016 Restructuring Plan [Member] |
Restructuring Cost and Reserve [Line Items] |
Schedule of Restructuring Reserve by Type of Cost [Table Text Block] | The following table summarizes the changes in the Company’s 2016 Plan reserve, included within other current liabilities in the consolidated statements of financial position (in millions):
| Employee Severance and Termination Benefits |  | Long-Lived Asset Impairments |  | Other |  | Currency Translation |  | Total
Original reserve | $ | 368 |  |  | $ | 190 |  |  | $ | 62 |  |  | $ | — |  |  | $ | 620 |
Acquired Tyco restructuring reserves | 78 |  |  | — |  |  | — |  |  | — |  |  | 78 |
Utilized—cash | (32 | ) |  | — |  |  | — |  |  | — |  |  | (32 | )
Utilized—noncash | — |  |  | (190 | ) |  | (32 | ) |  | 1 |  |  | (221 | )
Balance at September 30, 2016 | $ | 414 |  |  | $ | — |  |  | $ | 30 |  |  | $ | 1 |  |  | $ | 445 |
Adient spin-off impact | (194 | ) |  | — |  |  | (22 | ) |  | — |  |  | (216 | )
Utilized—cash | (86 | ) |  | — |  |  | (2 | ) |  | — |  |  | (88 | )
Utilized—noncash | — |  |  | — |  |  | — |  |  | 1 |  |  | 1 |
Adjustment to restructuring reserves | (25 | ) |  | — |  |  | — |  |  | — |  |  | (25 | )
Transfer to liabilities held for sale | (3 | ) |  | — |  |  | — |  |  | — |  |  | (3 | )
Adjustment to acquired Tyco restructuring reserves | (22 | ) |  | — |  |  | — |  |  | — |  |  | (22 | )
Balance at September 30, 2017 | $ | 84 |  |  | $ | — |  |  | $ | 6 |  |  | $ | 2 |  |  | $ | 92 |
Utilized—cash | (14 | ) |  | — |  |  | (2 | ) |  | — |  |  | (16 | )
Balance at March 31, 2018 | $ | 70 |  |  | $ | — |  |  | $ | 4 |  |  | $ | 2 |  |  | $ | 76 |

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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. + Details
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- Definition Tabular disclosure of an entity's restructuring reserve that occurred during the period associated with the exit from or disposal of business activities or restructurings for each major type of cost. This element may also include a description of any reversal and other adjustment made during the period to the amount of an accrued liability for restructuring activities. This element may be used to encapsulate the roll forward presentations of an entity's restructuring reserve by type of cost and in total, and explanation of changes that occurred in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)(2)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 + Details
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