Description of Business, Basis of Presentation, and Significant Accounting Policies (Summary of Accounts Receivable, Net of Allowance for Credit Losses) (Details) - USD ($) $ in Millions |
Aug. 31, 2026 |
May 31, 2026 |
|---|---|---|
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Total accounts receivable, gross | $ 1,658.7 | $ 1,548.0 |
| Less: Allowance for credit losses | 42.8 | 40.4 |
| Accounts receivable, net of allowance for credit losses | 1,615.9 | 1,507.6 |
| Trade Receivables [Member] | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Total accounts receivable, gross | 289.6 | 238.5 |
| Purchased Receivables [Member] | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Total accounts receivable, gross | $ 1,369.1 | $ 1,309.5 |