Goodwill and Other Intangible Assets - Schedule of Other Intangible Assets (Details) - USD ($) $ in Thousands |
Jun. 30, 2026 |
Sep. 30, 2025 |
|---|---|---|
| Finite-lived | ||
| Accumulated Amortization | $ (2,235,955) | $ (2,950,907) |
| Intangible Assets | ||
| Gross Carrying Amount | 8,166,678 | 6,725,088 |
| Net Carrying Amount | 5,930,723 | 3,774,181 |
| Trade Names | ||
| Indefinite-lived intangibles | ||
| Indefinite-lived trade names | $ 17,000 | 17,000 |
| Customer relationships | ||
| Finite-lived | ||
| Weighted Average Remaining Useful Life | 12 years | |
| Gross Carrying Amount | $ 3,994,307 | 5,250,912 |
| Accumulated Amortization | (1,375,141) | (1,860,484) |
| Net Carrying Amount | $ 2,619,166 | 3,390,428 |
| Other intangible assets | ||
| Finite-lived | ||
| Weighted Average Remaining Useful Life | 18 years | |
| Gross Carrying Amount | $ 4,155,371 | 1,457,176 |
| Accumulated Amortization | (860,814) | (1,090,423) |
| Net Carrying Amount | $ 3,294,557 | $ 366,753 |
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- Definition Useful life of finite-lived intangible asset, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of accumulated amortization of finite-lived intangible asset. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount, before accumulated amortization, of finite-lived intangible asset. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount, after accumulated amortization, of finite-lived intangible asset. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- References No definition available.
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- Definition Amount of indefinite-lived intangible asset. Excludes goodwill. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- References No definition available.
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- Definition Amount, before accumulated amortization, of finite- and indefinite-lived intangible assets and capitalized cost for software to be sold, leased, or marketed. Excludes goodwill. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, after accumulated amortization, of finite- and indefinite-lived intangible assets and capitalized cost for software to be sold, leased, or marketed. Excludes goodwill. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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