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The Company and a Summary of Its Significant Accounting Policies - Additional Information (Detail 7) - USD ($) $ in Millions | 12 Months Ended
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Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2022
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |
Capitalized contract cost amortization and reduction of carrying value associated with contract termination | $ 40.4 | $ 48.2 | $ 56.5
Advertising costs | 26.4 | 22.8 | $ 23.1
Prepaid Expenses and Other Current Assets [Member] |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |
Deferred customer contract costs | 20.2 | 19.8 |
Other Noncurrent Assets [Member] |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |
Deferred customer contract costs | 58.0 | 61.7 |
Deferred Customer Contract Acquisition Cost [Member] |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |
Deferred customer contract costs | 23.1 | 31.5 |
Deferred Customer Contract Fulfillment Cost [Member] |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |
Deferred customer contract costs | $ 55.1 | $ 50.0 |

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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 720 -SubTopic 35 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483406/720-35-50-1 + Details
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- Definition Amount, before accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 340 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479483/340-40-50-3 + Details
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