Income Taxes (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
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| Income Tax Disclosure [Abstract] | ||||
| Unrecognized tax benefits | $ 718.7 | $ 718.7 | ||
| Unrecognized tax benefits, net of federal benefit | 655.7 | 655.7 | ||
| Tax benefits that would reduce income tax expense and effective tax rate | 618.7 | 618.7 | ||
| Unrecognized tax benefits - interest and penalties | $ 81.2 | 81.2 | ||
| Unrecognized tax benefits increase | $ 78.2 | |||
| Effective tax rate (as a percent) | 22.10% | 23.00% | 21.60% | 22.30% |
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- Definition Unrecognized Tax Benefits, Net Of Federal Benefit No definition available.
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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition Amount of unrecognized tax benefits. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of increase (decrease) in unrecognized tax benefits attributable to uncertain tax positions taken in tax returns. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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