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Intangible Assets (Tables) | 12 Months Ended
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Sep. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Finite and Indefinite-Lived Intangible Assets | The gross and net carrying values of intangible assets as of the balance sheet dates, by major intangible asset class are as follows (in millions):
| September 30, 2022 |  | September 30, 2021 |
| Gross Amount |  | Accumulated Amortization |  | Net Amount |  | Gross Amount |  | Accumulated Amortization |  | Net Amount |
Intangible assets subject to amortization: |  |  |  |  |  |  |  |  |  |  |  |
Trade/domain names | $ | 3.7 |  |  | $ | (1.6) |  |  | $ | 2.1 |  |  | $ | 3.7 |  |  | $ | (0.9) |  |  | $ | 2.8 |  |
Software programs/platforms | 28.3 |  |  | (19.4) |  |  | 8.9 |  |  | 31.4 |  |  | (13.3) |  |  | 18.1 |  |
Customer base | 29.5 |  |  | (18.0) |  |  | 11.5 |  |  | 37.7 |  |  | (21.7) |  |  | 16.0 |  |
Total intangible assets subject to amortization | 61.5 |  |  | (39.0) |  |  | 22.5 |  |  | 72.8 |  |  | (35.9) |  |  | 36.9 |  |
Intangible assets not subject to amortization |  |  |  |  |  |  |  |  |  |  |  |
Website domains | 1.8 |  |  | — |  |  | 1.8 |  |  | 2.1 |  |  | — |  |  | 2.1 |  |
Business licenses | 3.7 |  |  | — |  |  | 3.7 |  |  | 3.7 |  |  | — |  |  | 3.7 |  |
Total intangible assets not subject to amortization | 5.5 |  |  | — |  |  | 5.5 |  |  | 5.8 |  |  | — |  |  | 5.8 |  |
Total intangible assets | $ | 67.0 |  |  | $ | (39.0) |  |  | $ | 28.0 |  |  | $ | 78.6 |  |  | $ | (35.9) |  |  | $ | 42.7 |  |
Schedule of Expected Amortization Expense | As of September 30, 2022, estimated future amortization expense was as follows:
(in millions) |
Fiscal 2023 | $ | 12.6 |
Fiscal 2024 | 5.0 |
Fiscal 2025 | 1.9 |
Fiscal 2026 | 1.2 |
Fiscal 2027 and thereafter | 1.8 |
| $ | 22.5 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life or exist in perpetuity, by either major class or business segment. + References No definition available. + Details
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- References No definition available. + Details
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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + 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) -URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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