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v3.25.3

Income Taxes (Tables) | 12 Months Ended
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Sep. 30, 2025
Income Tax Disclosure [Abstract] |
Schedule of Income Tax Expense | Income tax expense was comprised of:
| Fiscal Year Ended
| September 30, 2025 |  | September 30, 2024 |  | September 30, 2023
| (in millions)
Current: |  |  |  |  |
Federal | $ | 88.9 |  |  | $ | 15.1 |  |  | $ | 67.7 |
State | 26.4 |  |  | (78.6) |  |  | 71.9 |
Foreign | 56.1 |  |  | 63.5 |  |  | 52.8 |
Total current income tax expense | 171.4 |  |  | — |  |  | 192.4 |
Deferred: |  |  |  |  |
Federal | 7.7 |  |  | 45.2 |  |  | (71.8) |
State | (6.5) |  |  | 68.1 |  |  | (84.3) |
Foreign | 31.4 |  |  | 39.6 |  |  | 19.8 |
Total deferred income tax expense (benefit) | 32.6 |  |  | 152.9 |  |  | (136.3) |
Total income tax expense | $ | 204.0 |  |  | $ | 152.9 |  |  | $ | 56.1 |
Schedule of Difference Between Federal Statutory Rate and the Effective Tax Rate | The major elements contributing to the difference between the U.S. federal statutory rate of 21% for fiscal years ended September 30, 2025, 2024 and 2023 and the effective tax rate are as follows:
| Fiscal Year Ended |
| September 30, 2025 |  | September 30, 2024 |  | September 30, 2023 |
| Amount |  | % |  | Amount |  | % |  | Amount |  | % |
| (in millions) |
Tax at federal statutory rate | $ | 192.3 |  |  | 21.0 | % |  | $ | 150.8 |  |  | 21.0 | % |  | $ | 44.8 |  |  | 21.0 | % |
State income tax, net of federal benefit | 16.1 |  |  | 1.8 |  |  | (8.5) |  |  | (1.2) |  |  | (7.1) |  |  | (3.3) |  |
Change in uncertain tax positions | 46.7 |  |  | 5.1 |  |  | 18.6 |  |  | 2.6 |  |  | 9.4 |  |  | 4.4 |  |
Foreign residual income | 41.9 |  |  | 4.6 |  |  | 43.8 |  |  | 6.1 |  |  | 59.4 |  |  | 27.8 |  |
Nondeductible costs | 16.6 |  |  | 1.8 |  |  | 20.6 |  |  | 2.9 |  |  | 10.7 |  |  | 5.0 |  |
Tax rate changes | 2.3 |  |  | 0.3 |  |  | 1.2 |  |  | 0.2 |  |  | (3.2) |  |  | (1.5) |  |
Audit settlement | 1.4 |  |  | 0.1 |  |  | 0.5 |  |  | 0.1 |  |  | 1.9 |  |  | 0.9 |  |
Income tax credits and incentives | (59.5) |  |  | (6.5) |  |  | (63.5) |  |  | (8.8) |  |  | (68.2) |  |  | (31.9) |  |
Legal entity restructuring | (20.1) |  |  | (2.2) |  |  | — |  |  | — |  |  | — |  |  | — |  |
Exclusion of tax on non-controlling interests | (15.6) |  |  | (1.7) |  |  | (12.5) |  |  | (1.7) |  |  | (9.4) |  |  | (4.4) |  |
Valuation allowance | (11.8) |  |  | (1.3) |  |  | (12.6) |  |  | (1.8) |  |  | 16.6 |  |  | 7.8 |  |
Tax exempt income | (2.1) |  |  | (0.2) |  |  | (2.5) |  |  | (0.4) |  |  | (3.3) |  |  | (1.5) |  |
Foreign tax rate differential | (1.1) |  |  | (0.1) |  |  | (2.8) |  |  | (0.4) |  |  | 0.2 |  |  | 0.1 |  |
Return to provision | (0.5) |  |  | (0.1) |  |  | (3.7) |  |  | (0.5) |  |  | (0.5) |  |  | (0.2) |  |
ACAP investment sale | — |  |  | — |  |  | 20.2 |  |  | 2.8 |  |  | — |  |  | — |  |
Other items, net | (2.6) |  |  | (0.3) |  |  | 3.3 |  |  | 0.4 |  |  | 4.8 |  |  | 2.1 |  |
Total income tax expense | $ | 204.0 |  |  | 22.3 | % |  | $ | 152.9 |  |  | 21.3 | % |  | $ | 56.1 |  |  | 26.3 | % |
Schedule of Deferred Tax Assets (liabilities) | The deferred tax assets (liabilities) are as follows:
| Fiscal Year Ended
| September 30, 2025 |  | September 30, 2024
| (in millions)
Deferred tax assets: |  |  |
Compensation and benefit accruals not currently deductible | $ | 81.8 |  |  | $ | 85.4 |
Net operating loss carryforwards | 99.2 |  |  | 107.5 |
Self-insurance reserves | 66.6 |  |  | 38.3 |
Research and experimentation and other tax credits | 34.3 |  |  | 67.1 |
Pension liability | 23.5 |  |  | 34.9 |
Accrued liabilities | 263.3 |  |  | 265.7 |
Capital loss carryforward | 13.0 |  |  | 49.5 |
Partnership investment | 15.5 |  |  | 22.3 |
Other | 12.2 |  |  | 8.2 |
Total deferred tax assets | 609.4 |  |  | 678.9 |
Deferred tax liabilities: |  |  |
Unearned revenue | (31.0) |  |  | (4.1) |
Depreciation and amortization | (58.9) |  |  | (83.7) |
Acquired intangible assets | (39.6) |  |  | — |
Investment in subsidiaries | (9.8) |  |  | (9.9) |
Right of use assets | (82.4) |  |  | (85.2) |
Contingent consideration | — |  |  | (30.5) |
Other | (3.3) |  |  | (5.4) |
Total deferred tax liabilities | (225.0) |  |  | (218.8) |
Valuation allowance | (157.1) |  |  | (160.9) |
Net deferred tax assets | $ | 227.3 |  |  | $ | 299.2 |
Schedule of Reconciliation of Unrecognized Tax Benefits | A reconciliation of the beginning and ending amount of gross unrecognized tax benefits is as follows:
| Fiscal Year Ended
| September 30, 2025 |  | September 30, 2024
| (in millions)
Balance at the beginning of the year | $ | 81.3 |  |  | $ | 62.1 |
Gross increase in current period’s tax positions | 9.2 |  |  | 34.5 |
Gross increase in prior years’ tax positions | 47.0 |  |  | 13.9 |
Gross decrease in prior years’ tax positions | (6.4) |  |  | (20.1) |
Decrease due to settlement with tax authorities | — |  |  | (7.4) |
Decrease due to lapse of statute of limitations | (1.3) |  |  | (2.2) |
Gross change due to foreign exchange fluctuations | (0.2) |  |  | 0.5 |
Balance at the end of the year | $ | 129.6 |  |  | $ | 81.3 |

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