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Basis of Presentation - Additional Information (Detail 2) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Mar. 31, 2025
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Increase (decrease) in unbilled accounts receivable |  |  | $ (5.0) |  |
Capitalized costs, net, related to software developed for resale | $ 816.4 |  | 816.4 |  | $ 780.3
Capitalized cost related to software development for resale | 22.6 | $ 19.0 | 46.1 | $ 37.8 |
Amortization expense of capitalized software development costs | 4.9 | 15.1 | 19.8 | 29.4 |
Capitalized Computer Software, Accumulated Amortization | 534.0 |  | 534.0 |  | 515.8
Gross capitalized implementation costs incurred in cloud computing arrangements | 105.6 |  | 105.6 |  | 88.7
Accumulated amortization related to capitalized implementation costs incurred in cloud computing arrangements | 23.6 |  | 23.6 |  | $ 18.4
Amortization of capitalized implementation costs incurred in cloud computing arrangements | $ 2.6 | $ 1.7 | $ 5.1 | $ 3.2 |
Maximum [Member] |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Estimated useful life, years | 12 years |  | 12 years |  |
Computer Software, Intangible Asset [Member] | Maximum [Member] |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Estimated useful life, years | 5 years |  | 5 years |  |
Funded Research and Development from Customer Contracts [Member] |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Percentage of revenue | 10.00% | 12.00% | 10.00% | 12.00% |
U.S. Government as an Individual Customer [Member] |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Percentage of revenue | 17.00% | 18.00% | 16.00% | 17.00% |

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