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Financial Information by Segment - Schedule of Income (Loss) from Continuing Operations before Taxes for Unallocated and Other (Parenthetical) (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2016 | Mar. 31, 2015 | Mar. 31, 2016 | Mar. 31, 2015
Segment Reporting Information [Line Items] |  |  |  |
Restructuring reserve, period expense | $ (5) | $ 5 | $ 43 | $ 12
Employee benefit plan settlement charge |  |  |  | 18
Certain Item [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Restructuring reserve, period expense | (5) | 5 | 43 | 12
Charges for environmental expense | 1 |  | 3 |
Acquisition and integration related charges |  | $ 1 |  | 2
Employee benefit plan settlement charge |  |  |  | $ 18
Certain Item [Member] | Devaluation of Argentine Peso [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net foreign currency exchange rate, re measurement loss | $ 3 |  | $ 11 |

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- Definition Business combination acquisition and integration related costs. + References No definition available. + Details
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- Definition Foreign currency exchange rate, remeasurement income (loss) on foreign currency denominated debt. + References No definition available. + Details
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- Definition Restructuring charges benefit. + References No definition available. + Details
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- Definition Amount of net gain (loss) recognized in net periodic benefit cost as a result of an irrevocable action that relieves the employer (or the plan) of primary responsibility for a benefit obligation and eliminates significant risks related to the obligation and the assets used to effect the settlement. Examples of transactions that constitute a settlement include, but are not limited to, lump-sum cash payments to plan participants in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contracts to cover vested benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 15 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7577095&loc=d3e8001-114927 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(7) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition The charge against earnings in the period for known or estimated future costs arising from requirements to perform environmental remediation activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13296-110859 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
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