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Cash, Cash Equivalents and Investments - Contractual Maturities of Available-for-Sale Investments (Details) - USD ($) $ in Millions	Nov. 30, 2025	Feb. 28, 2025
Cost Basis
Due in one year or less	$ 178.4	$ 127.7
No fixed maturity	0.0	10.0
Total	178.4	137.7
Fair Value
Due in one year or less	178.4	127.7
No fixed maturity	0.0	0.0
Total	$ 178.4	$ 127.7

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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