Cash, Cash Equivalents and Investments - Components of Cash, Cash Equivalents and Investments (Details) - USD ($) $ in Millions		12 Months Ended
		Feb. 28, 2025		Feb. 29, 2024		Feb. 28, 2023
Cash and Cash Equivalents [Line Items]
Cost Basis		$ 415.4		$ 302.1
Unrealized Gains		6.1		6.1
Unrealized Losses		11.2		10.0
Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment, Annual Amount		(2.4)
Fair Value		410.3		298.2
Cash and cash equivalents (note 4)		266.7		175.1		$ 295.7
Short-term Investments		71.1		62.0
Long-term investments		58.9		35.7
Restricted Cash and Cash Equivalents		13.6		25.4		$ 26.6
Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount		1.2
Bank balances
Cash and Cash Equivalents [Line Items]
Cost Basis		223.7		96.2
Unrealized Gains		0.0		0.0
Unrealized Losses		0.0		0.0
Fair Value		223.7		96.2
Cash and cash equivalents (note 4)		223.7		96.2
Short-term Investments		0.0		0.0
Long-term investments		0.0		0.0
Restricted Cash and Cash Equivalents		0.0		0.0
Other investments
Cash and Cash Equivalents [Line Items]
Cost Basis		23.3	[1]	29.6	[2]
Unrealized Gains		4.9		6.1
Unrealized Losses		0.0		0.0
Fair Value		28.2		35.7
Cash and cash equivalents (note 4)		0.0		0.0
Short-term Investments		0.0		0.0
Long-term investments		28.2		35.7
Restricted Cash and Cash Equivalents		0.0		0.0
Bank Balances and Other Investments [Domain]
Cash and Cash Equivalents [Line Items]
Cost Basis		247.0		125.8
Unrealized Gains		4.9		6.1
Unrealized Losses		0.0		0.0
Fair Value		251.9		131.9
Cash and cash equivalents (note 4)		223.7		96.2
Short-term Investments		0.0		0.0
Long-term investments		28.2		35.7
Restricted Cash and Cash Equivalents		0.0		0.0
Level 1: | Equity securities
Cash and Cash Equivalents [Line Items]
Cost Basis		10.0		10.0
Equity Securities, FV-NI, Unrealized Gain		0.0		0.0
Equity Securities, FV-NI, Unrealized Loss		(10.0)		(10.0)
Fair Value		0.0		0.0
Cash and cash equivalents (note 4)		0.0		0.0
Short-term Investments		0.0		0.0
Long-term investments		0.0		0.0
Restricted Cash and Cash Equivalents		0.0		0.0
Level 2:
Cash and Cash Equivalents [Line Items]
Cost Basis		127.7		166.3
Debt Securities, Available-for-sale, Unrealized Gain		0.0		0.0
Debt Securities, Available-for-sale, Unrealized Loss		0.0		0.0
Fair Value		127.7		166.3
Cash and cash equivalents (note 4)		43.0		78.9
Short-term Investments		71.1		62.0
Long-term investments		0.0		0.0
Restricted Cash and Cash Equivalents		13.6		25.4
Level 2: | Term deposits, and certificates of deposits
Cash and Cash Equivalents [Line Items]
Cost Basis		39.3		21.5
Debt Securities, Available-for-sale, Unrealized Gain		0.0		0.0
Debt Securities, Available-for-sale, Unrealized Loss		0.0		0.0
Fair Value		39.3		21.5
Cash and cash equivalents (note 4)		0.0		0.0
Short-term Investments		30.1		0.0
Long-term investments		0.0		0.0
Restricted Cash and Cash Equivalents		9.2		21.5
Level 2: | Bearer deposit notes
Cash and Cash Equivalents [Line Items]
Cost Basis		10.3		53.1
Debt Securities, Available-for-sale, Unrealized Gain		0.0		0.0
Debt Securities, Available-for-sale, Unrealized Loss		0.0		0.0
Fair Value		10.3		53.1
Cash and cash equivalents (note 4)		7.3		28.4
Short-term Investments		3.0		24.7
Long-term investments		0.0		0.0
Restricted Cash and Cash Equivalents		0.0		0.0
Level 2: | Commercial paper
Cash and Cash Equivalents [Line Items]
Cost Basis		55.5		46.8
Debt Securities, Available-for-sale, Unrealized Gain		0.0		0.0
Debt Securities, Available-for-sale, Unrealized Loss		0.0		0.0
Fair Value		55.5		46.8
Cash and cash equivalents (note 4)		27.8		14.7
Short-term Investments		27.7		32.1
Long-term investments		0.0		0.0
Restricted Cash and Cash Equivalents		0.0		0.0
Level 2: | Non-U.S. promissory notes
Cash and Cash Equivalents [Line Items]
Cost Basis		9.8		35.4
Debt Securities, Available-for-sale, Unrealized Gain		0.0		0.0
Debt Securities, Available-for-sale, Unrealized Loss		0.0		0.0
Fair Value		9.8		35.4
Cash and cash equivalents (note 4)		7.9		30.2
Short-term Investments		1.9		5.2
Long-term investments		0.0		0.0
Restricted Cash and Cash Equivalents		0.0		0.0
Level 2: | Non-U.S. government sponsored enterprise notes
Cash and Cash Equivalents [Line Items]
Cost Basis		9.3
Debt Securities, Available-for-sale, Unrealized Gain		0.0
Debt Securities, Available-for-sale, Unrealized Loss		0.0
Fair Value		9.3
Cash and cash equivalents (note 4)		0.0
Short-term Investments		4.9
Long-term investments		0.0
Restricted Cash and Cash Equivalents		4.4
Level 2: | U.S. treasury bills
Cash and Cash Equivalents [Line Items]
Cost Basis				9.5
Unrealized Gains				0.0
Unrealized Losses				0.0
Fair Value				9.5
Cash and cash equivalents (note 4)				5.6
Short-term Investments				0.0
Long-term investments				0.0
Restricted Cash and Cash Equivalents				$ 3.9
Level 2: | Corporate notes/bonds
Cash and Cash Equivalents [Line Items]
Cost Basis		3.5
Debt Securities, Available-for-sale, Unrealized Gain		0.0
Debt Securities, Available-for-sale, Unrealized Loss		0.0
Fair Value		3.5
Cash and cash equivalents (note 4)		0.0
Short-term Investments		3.5
Long-term investments		0.0
Restricted Cash and Cash Equivalents		0.0
Level 3: | Other investments
Cash and Cash Equivalents [Line Items]
Cost Basis	[1]	30.7
Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment, Annual Amount		(1.2)
Fair Value		30.7
Cash and cash equivalents (note 4)		0.0
Short-term Investments		0.0
Long-term investments		30.7
Restricted Cash and Cash Equivalents		0.0
Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount		$ 1.2

[1] Cost basis for other investments includes the effect of returns of capital and impairment.

[2] Cost basis for other investments includes the effect of returns of capital and impairment.