Account Receivables, Net of Allowance for Credit Losses - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses	$ 71.3	$ 60.2
Accounts receivable, net of allowance for credit losses	391.3	347.8
Significant Payment Processors [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net of allowance for credit losses	$ 0.0	$ 0.0
Concentration risk, percentage	10.00%	10.00%
Significant Partner [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net of allowance for credit losses	$ 111.7	$ 100.9
Concentration risk, percentage	29.00%	29.00%
Significant Customer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net of allowance for credit losses	$ 0.0	$ 0.0
Concentration risk, percentage	10.00%	10.00%
Significant Broker [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net of allowance for credit losses	$ 55.3	$ 64.6
Concentration risk, percentage	14.00%	19.00%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 20
-Name Accounting Standards Codification
-Section 40
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481628/310-20-40-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-2

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Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-2

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Amount of allowance for credit loss on accounts receivable, classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(4))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-4

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Concentration Risk Threshold Percentage.

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