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Financial Instruments (Schedule Of Derivative Instruments) (Details) lb in Millions, $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2019 USD ($) lb | Mar. 31, 2018 USD ($) | Mar. 31, 2019 USD ($) lb | Mar. 31, 2018 USD ($)
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gain (loss) reclassified to earnings | $ 30 | $ (6) | $ 40 | $ (1)
Gain (loss) to other comprehensive income | 32 | (1) | 13 | 0
Commodity Contract [Member] | Cash Flow Hedging [Member] | Other Comprehensive Income (Loss) [Member] |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gain (loss) to other comprehensive income | 10 | (9) | 3 | 4
Commodity Contract [Member] | Cash Flow Hedging [Member] | Cost of Sales [Member] |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gain (loss) reclassified to earnings | (3) | 6 | (6) | 11
Foreign Exchange Contract [Member] |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Notional amount of foreign currency hedge positions | 2,300 |  | 2,300 |
Foreign Exchange Contract [Member] | Other deductions, net [Member] |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gain (loss) reclassified to earnings | 29 | (12) | 40 | (12)
Foreign Exchange Contract [Member] | Cash Flow Hedging [Member] | Other Comprehensive Income (Loss) [Member] |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gain (loss) to other comprehensive income | 22 | 8 | 10 | (4)
Foreign Exchange Contract [Member] | Cash Flow Hedging [Member] | Sales, Cost of Sales [Member] |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gain (loss) reclassified to earnings | 4 | $ 0 | 6 | $ 0
All Commodity Hedges [Member] |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Amount of commodities hedged | $ 118 |  | $ 118 |
Copper and Aluminum [Member] |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Weight in pounds of copper and aluminum commodity hedges | lb | 45 |  | 45 |

X
- Definition Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Amount of hedged item in hedging relationship. Excludes hedged asset or liability. + References No definition available. + Details
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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959 + Details
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