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Income Taxes - Additional Information (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Aug. 26, 2024 | Jun. 30, 2026 | Mar. 31, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025 | Sep. 30, 2025
Income Tax Disclosure [Line Items] |  |  |  |  |  |  |
Provision (benefit) for income taxes |  | $ 33,660 |  | $ 52,348 | $ 226,193 | $ 105,875 |
Unrecognized tax benefits |  | 50,900 |  |  | 50,900 |  | $ 157,700
Income taxes payable |  | 130,500 |  |  | 130,500 |  | 179,100
Accrued income taxes |  | 85,200 |  |  | 85,200 |  | 28,700
Income tax provision upon recognition of unrecognized tax benefit |  | 50,900 |  |  | 50,900 |  |
Unrecognized tax benefits, increase in valuation allowance upon recognition |  | 6,000 |  |  | 6,000 |  |
Potential decrease in unrecognized tax benefits |  | 1,000 |  |  | 1,000 |  |
Solar energy equity investment |  |  |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |  |  |
Provision (benefit) for income taxes |  | 7,200 |  |  |  |  |
Investment program proportional amortization method elected income tax credits |  | 78,800 |  |  |  |  |
Partial offset of investment amortization |  | 71,600 |  |  |  |  |
Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherLiabilitiesNoncurrent |  |  |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |  |  |
Accrued income taxes |  | 45,300 |  |  | 45,300 |  | $ 150,400
IRS [Member] |  |  |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |  |  |
Provision (benefit) for income taxes |  |  |  |  | (7,100) |  |
Foreign Tax Jurisdiction [Member] |  |  |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |  |  |
Provision (benefit) for income taxes |  |  |  |  |  | $ (10,400) |
Varian Medical Systems, Inc. v. Commissioner tax court ruling |  |  |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |  |  |
Provision (benefit) for income taxes |  | $ 14,400 |  |  |  |  |
Varian Medical Systems, Inc. v. Commissioner tax court ruling | Foreign Tax Jurisdiction [Member] |  |  |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |  |  |
Additional foreign tax credits | $ 14,400 |  |  |  |  |  |
Kepware and ThingWorx |  |  |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |  |  |
Provision (benefit) for income taxes |  |  | $ 102,400 |  | $ 95,600 |  |

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