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Revenue Recognition - Capitalized Contract Costs (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Sep. 30, 2024
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Capitalized Contract Cost [Line Items] |  |
Total | $ 576 | $ 556
Other current assets |  |
Capitalized Contract Cost [Line Items] |  |
Total | 327 | 265
Other noncurrent assets |  |
Capitalized Contract Cost [Line Items] |  |
Total | $ 249 | $ 291

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- Definition Amount, before accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 340 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479483/340-40-50-3 + Details
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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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 340 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479483/340-40-50-3 + Details
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