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Derivative Instruments and Hedging Activities - Location and Amount of Gains and Losses on Derivative Instruments and Related Hedge Items (Detail) - USD ($) $ in Millions | 3 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Derivative Instruments Not Designated as Hedging Instruments [Abstract] |  |
Gain (Loss) Recognized in Income, Derivative not Recognized as Hedge | $ (8) | $ 6
Foreign Currency Exchange Derivatives | Cost of Sales |  |
Derivative Instruments Not Designated as Hedging Instruments [Abstract] |  |
Gain (Loss) Recognized in Income, Derivative not Recognized as Hedge | (4) | 2
Foreign Currency Exchange Derivatives | Net Financing Charges |  |
Derivative Instruments Not Designated as Hedging Instruments [Abstract] |  |
Gain (Loss) Recognized in Income, Derivative not Recognized as Hedge | (21) | 3
Foreign Currency Exchange Derivatives | Discontinued Operations |  |
Derivative Instruments Not Designated as Hedging Instruments [Abstract] |  |
Gain (Loss) Recognized in Income, Derivative not Recognized as Hedge | 26 | 3
Equity swap | Selling, General And Administrative |  |
Derivative Instruments Not Designated as Hedging Instruments [Abstract] |  |
Gain (Loss) Recognized in Income, Derivative not Recognized as Hedge | (9) | (2)
Net Investment Hedging [Member] |  |
Cash Flow Hedges Derivative Instruments at Fair Value, Net [Abstract] |  |
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net | 34 | (36)
Cash Flow Hedging |  |
Cash Flow Hedges Derivative Instruments at Fair Value, Net [Abstract] |  |
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net | (6) | 9
Amount of Gain (Loss) Reclassified from AOCI into Income | (6) | 7
Cash Flow Hedging | Foreign Currency Exchange Derivatives |  |
Cash Flow Hedges Derivative Instruments at Fair Value, Net [Abstract] |  |
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net | 0 | 6
Cash Flow Hedging | Foreign Currency Exchange Derivatives | Cost of Sales |  |
Cash Flow Hedges Derivative Instruments at Fair Value, Net [Abstract] |  |
Amount of Gain (Loss) Reclassified from AOCI into Income | 0 | 2
Cash Flow Hedging | Foreign Currency Exchange Derivatives | Discontinued Operations |  |
Cash Flow Hedges Derivative Instruments at Fair Value, Net [Abstract] |  |
Amount of Gain (Loss) Reclassified from AOCI into Income | 1 | 0
Cash Flow Hedging | Commodity Derivatives |  |
Cash Flow Hedges Derivative Instruments at Fair Value, Net [Abstract] |  |
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net | (6) | 3
Cash Flow Hedging | Commodity Derivatives | Cost of Sales |  |
Cash Flow Hedges Derivative Instruments at Fair Value, Net [Abstract] |  |
Amount of Gain (Loss) Reclassified from AOCI into Income | (2) | 2
Cash Flow Hedging | Commodity Derivatives | Discontinued Operations |  |
Cash Flow Hedges Derivative Instruments at Fair Value, Net [Abstract] |  |
Amount of Gain (Loss) Reclassified from AOCI into Income | $ (5) | $ 3

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- Definition Cash Flow Hedge [Abstract] + References No definition available. + Details
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- Definition The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4D -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624177-113959 + Details
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- Definition The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 + Details
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- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 + Details
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