Income Taxes (Tables)
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12 Months Ended |
Jun. 30, 2026 |
| Income Tax Disclosure [Abstract] |
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| Schedule of Income Tax From Continuing Operations Provision for Income Tax Components Disclosure |
Earnings before income taxes shown below are based on the geographic location to which such earnings are attributable. | | | | | | | | | | | | | | | | | | | | | | Years ended June 30, | | 2026 | | 2025 | | 2024 | | | | | | | | | Earnings before income taxes: | | | | | | | | United States | | $ | 5,198.7 | | | $ | 4,825.6 | | | $ | 4,408.0 | | | Foreign | | 531.6 | | | 484.5 | | | 464.3 | | | | $ | 5,730.3 | | | $ | 5,310.1 | | | $ | 4,872.3 | |
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| Schedule of Components of Provision (Benefit) for Income Taxes |
The provision (benefit) for income taxes consists of the following components: | | | | | | | | | | | | | | | | | | | | | | Years ended June 30, | | 2026 | | 2025 | | 2024 | | | | | | | | | Current: | | | | | | | | Federal | | $ | 785.4 | | | $ | 880.5 | | | $ | 847.4 | | | Foreign | | 217.2 | | | 136.0 | | | 132.8 | | | State | | 157.9 | | | 176.9 | | | 177.5 | | | Total current | | 1,160.5 | | | 1,193.4 | | | 1,157.7 | | | | | | | | | | Deferred: | | | | | | | | Federal | | 160.1 | | | 0.7 | | | (18.7) | | | Foreign | | (14.2) | | | 19.4 | | | (6.6) | | | State | | 10.4 | | | 16.9 | | | (12.1) | | | Total deferred | | 156.3 | | | 37.0 | | | (37.4) | | | Total provision for income taxes | | $ | 1,316.8 | | | $ | 1,230.4 | | | $ | 1,120.3 | |
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| Schedule of Effective Income Tax Rate Reconciliation |
A reconciliation between the Company's effective tax rate and the U.S. federal statutory rate is as follows: | | | | | | | | | | | | | | | | Years ended June 30, | | 2026 | | % | | | | | | | U.S. Federal Statutory Tax Rate | | 1,203.4 | | | 21.0 | | | | | | | | Increase/(decrease) in provision from: | | | | | | State and local income taxes, net of federal income tax effect (a) | | 151.0 | | | 2.6 | | | Foreign tax effects | | 82.8 | | | 1.5 | | | | | | | | Effect of cross-border tax laws | | (50.7) | | | (0.9) | | | Tax credits | | (43.5) | | | (0.7) | | | | | | | | Nontaxable or nondeductible items | | 2.0 | | | — | | | Changes in unrecognized tax benefits | | (12.7) | | | (0.2) | | | Other | | (15.5) | | | (0.3) | | | | $ | 1,316.8 | | | 23.0 | |
(a) State taxes in California, New York, New Jersey, and Illinois, made up the majority (greater than 50 percent) of the tax effect in this category.
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| Schedule of Reconciliation Between Federal Statutory Tax and Effective Tax Rate |
Differences between the U.S. statutory federal rate and the Company's effective income tax rate for periods prior to the adoption of ASU 2023-09 are as follows: | | | | | | | | | | | | | | | | | | | | | | | | | | | | Years ended June 30, | | 2025 | | % | | 2024 | | % | | | | | | | | | | | Provision for taxes at U.S. statutory rate | | $ | 1,115.1 | | | 21.0 | | | $ | 1,023.2 | | | 21.0 | | | | | | | | | | | | Increase/(decrease) in provision from: | | | | | | | | | | | | | | | | | | | State taxes, net of federal tax benefit | | 128.0 | | | 2.4 | | | 120.6 | | | 2.5 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Foreign rate differential | | 39.0 | | | 0.7 | | | 41.0 | | | 0.9 | | | Excess tax benefit - Stock-based compensation | | (24.3) | | | (0.4) | | | (17.1) | | | (0.4) | | | Other | | (27.4) | | | (0.5) | | | (47.4) | | | (1.0) | | | | $ | 1,230.4 | | | 23.2 | | | $ | 1,120.3 | | | 23.0 | |
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| Summary of Deferred Tax Assets and Liabilities |
The significant components of deferred income tax assets and liabilities and their balance sheet classifications are as follows: | | | | | | | | | | | | | | | | Years ended June 30, | | 2026 | | 2025 | | | | | | | Deferred tax assets: | | | | | | Accrued expenses not currently deductible | | $ | 294.9 | | | $ | 256.7 | | | Stock-based compensation expense | | 59.8 | | | 56.0 | | | Foreign tax credits | | 9.6 | | | 8.8 | | | | | | | | Fixed and intangible assets | | 80.7 | | | 216.8 | | | Net operating losses | | 57.4 | | | 59.3 | | | Disallowed business interest expense carryforward | | — | | | 30.9 | | | Unrealized investment losses, net | | 106.1 | | | 98.4 | | | | | | | | Other | | 32.2 | | | 28.5 | | | | 640.7 | | | 755.4 | | | Less: valuation allowances | | (24.1) | | | (23.8) | | | Deferred tax assets, net | | $ | 616.6 | | | $ | 731.6 | | | | | | | | Deferred tax liabilities: | | | | | | Deferred contract costs | | $ | 664.9 | | | $ | 654.0 | | | | | | | | Prepaid expenses | | 122.3 | | | 103.1 | | | Prepaid retirement benefits | | 76.6 | | | 53.1 | | | | | | | | Tax on unrepatriated earnings | | 10.4 | | | 12.0 | | | Other | | 17.3 | | | 16.9 | | | Deferred tax liabilities | | 891.5 | | | 839.1 | | | Net deferred tax (liabilities)/assets | | $ | (274.9) | | | $ | (107.5) | |
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| Schedule of Income Taxes Paid (Refunded) |
| | | | | | | | | | Years ended June 30, | | 2026 | | | | | U.S. Federal | | $ | 672.5 | | | U.S. State | | 167.9 | | | Foreign | | 166.3 | | | Total income taxes paid | | $ | 1,006.7 | |
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| Summary of Reconciliation of the Beginning and Ending Amounts of Unrecognized Tax Benefits |
A reconciliation of the beginning and ending amounts of unrecognized tax benefits is as follows: | | | | | | | | | | | | | | | | | | | | | | | 2026 | | 2025 | | 2024 | | | | | | | | | Unrecognized tax benefits at beginning of the year | | $ | 163.0 | | | $ | 126.9 | | | $ | 116.9 | | | Additions for tax positions | | 28.2 | | | 29.5 | | | 17.2 | | | | | | | | | | Additions for tax positions of prior periods | | 33.6 | | | 26.7 | | | 17.8 | | | Reductions for tax positions of prior periods | | (47.6) | | | (1.8) | | | (12.8) | | | Settlement with tax authorities | | (18.1) | | | (0.1) | | | (9.0) | | | Expiration of the statute of limitations | | (5.1) | | | (17.5) | | | (2.9) | | | Impact of foreign exchange rate fluctuations | | (1.5) | | | (0.7) | | | (0.3) | | | Unrecognized tax benefit at end of year | | $ | 152.5 | | | $ | 163.0 | | | $ | 126.9 | |
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| Summary of Income Tax Examinations |
Examinations in progress in which the Company has significant business operations are as follows: | | | | | | | | | | | | | Taxing Jurisdiction | | Fiscal Years under Examination | | | U.S. (IRS) | | 2025 - 2026 | | | Arizona | | 2016 - 2020 | | | | | | | Massachusetts | | 2016 - 2023 | | | Michigan | | 2020 - 2023 | | | New Jersey | | 2020 - 2022 | | | New York City | | 2022 - 2024 | | | New York State | | 2022 - 2024 | | | | | | | | | | | | | | | India | | 2014 - 2023 | | | | | |
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