Account Receivables, Net of Allowance for Credit Losses - Summary of Account Receivables, Net of Allowance for Credit Losses (Detail) - USD ($) $ in Millions |
Mar. 31, 2026 |
Mar. 31, 2025 |
|---|---|---|
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Account Receivables, net of Allowance for Credit Losses | $ 391.3 | $ 347.8 |
| Receivables from payment processors [Member] | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Account Receivables, net of Allowance for Credit Losses | 73.9 | 50.6 |
| Receivables from partners [Member] | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Account Receivables, net of Allowance for Credit Losses | 107.6 | 99.5 |
| Receivables from customers [Member] | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Account Receivables, net of Allowance for Credit Losses | 146.1 | 127.5 |
| Receivables from brokers [Member] | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Account Receivables, net of Allowance for Credit Losses | $ 63.7 | $ 70.2 |