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Goodwill And Other Intangibles (Schedule Of Gross Carrying Amount And Accumulated Amortization Of Identifiable Intangible Assets By Major Class) (Details) - USD ($) $ in Millions | 12 Months Ended
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Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2019
Intangibles Other Than Goodwill [Line Items] |  |  |
Gross carrying amount | $ 5,911 | $ 5,106 |
Less: Accumulated amortization | 3,034 | 2,638 |
Net carrying amount | 2,877 | 2,468 |
Amortization of intangible assets | 470 | 369 | $ 359
Future amortization expense, 2022 | 408 |  |
Future amortization expense, 2023 | 379 |  |
Future amortization expense, 2024 | 347 |  |
Future amortization expense, 2025 | 306 |  |
Future amortization expense, 2026 | 274 |  |
Customer Relationships [Member] |  |  |
Intangibles Other Than Goodwill [Line Items] |  |  |
Gross carrying amount | 2,391 | 2,059 |
Less: Accumulated amortization | 896 | 731 |
Net carrying amount | 1,495 | 1,328 |
Intellectual Property [Member] |  |  |
Intangibles Other Than Goodwill [Line Items] |  |  |
Gross carrying amount | 2,062 | 1,628 |
Less: Accumulated amortization | 923 | 773 |
Net carrying amount | 1,139 | 855 |
Capitalized Software [Member] |  |  |
Intangibles Other Than Goodwill [Line Items] |  |  |
Gross carrying amount | 1,458 | 1,419 |
Less: Accumulated amortization | 1,215 | 1,134 |
Net carrying amount | $ 243 | $ 285 |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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