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Property and Equipment | 12 Months Ended
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Sep. 30, 2025
Property, Plant and Equipment [Abstract] |
Property and Equipment | Property and Equipment Property and equipment, at cost, consists of the following:
| Fiscal Year Ended |  | Useful Lives (years)
| September 30, 2025 |  | September 30, 2024 |
| (in millions) |  |  |  |
Building and land | $ | 10.5 |  |  | $ | 10.1 |  |  | 10 | - | 45
Leasehold improvements | 275.0 |  |  | 299.3 |  |  | 1 | - | 20
Computer systems and equipment | 770.4 |  |  | 659.6 |  |  | 3 | - | 12
Furniture and fixtures | 85.7 |  |  | 92.2 |  |  | 3 | - | 10
Total | 1,141.6 |  |  | 1,061.2 |  |  |  |  |
Accumulated depreciation and amortization | (725.4) |  |  | (706.8) |  |  |  |  |
Property and equipment, net | $ | 416.2 |  |  | $ | 354.4 |  |  |  |  |
Depreciation expense for the fiscal years ended September 30, 2025, 2024 and 2023 was $166.3 million, $152.3 million, and $152.3 million, respectively. Depreciation is calculated using primarily the straight-line method over the estimated useful lives of the assets, or in the case of leasehold improvements and capitalized leases, the lesser of the remaining term of the lease or its estimated useful life.

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- Definition The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 360 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/360/tableOfContent Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 6 -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477798/958-360-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477798/958-360-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 7 -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477798/958-360-50-7 + Details
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