v3.26.3
Cash, Cash Equivalents and Investments - Components of Cash, Cash Equivalents and Investments (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Aug. 31, 2026
Aug. 31, 2025
Aug. 31, 2026
Aug. 31, 2025
Feb. 28, 2026
Cash, Cash Equivalents and Investments [Line Items]          
Cost Basis $ 440.5   $ 440.5   $ 426.9
Unrealized Gains     6.7   6.7
Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount 0.0 $ 0.0 0.0 $ 0.0  
Unrealized Losses     (0.1)   (1.2)
Fair Value 447.1   447.1   432.4
Cash and cash equivalents (note 2) 266.2   266.2   274.7
Short-term Investments 111.3   111.3   85.2
Long-term investments (note 2) 55.5   55.5   58.3
Restricted Cash Equivalents 14.1   14.1   14.2
Bank balances          
Cash, Cash Equivalents and Investments [Line Items]          
Cost Basis 111.8   111.8   168.6
Unrealized Gains     0.0   0.0
Unrealized Losses     0.0   0.0
Fair Value 111.8   111.8   168.6
Cash and cash equivalents (note 2) 111.8   111.8   168.6
Short-term Investments 0.0   0.0   0.0
Long-term investments (note 2) 0.0   0.0   0.0
Restricted Cash Equivalents 0.0   0.0   0.0
Bank Balances and Other Investments [Domain]          
Cash, Cash Equivalents and Investments [Line Items]          
Cost Basis 160.6   160.6   220.1
Unrealized Gains     6.7   2.4
Unrealized Losses     0.0   (1.2)
Fair Value 167.3   167.3   221.3
Cash and cash equivalents (note 2) 111.8   111.8   168.6
Short-term Investments 0.0   0.0   0.0
Long-term investments (note 2) 55.5   55.5   52.7
Restricted Cash Equivalents 0.0   0.0   0.0
Equity securities          
Cash, Cash Equivalents and Investments [Line Items]          
Cost Basis 48.8 [1]   48.8 [1]   51.5 [2]
Unrealized Gains     6.7   2.4
Unrealized Losses     0.0   (1.2)
Fair Value 55.5   55.5   52.7
Cash and cash equivalents (note 2) 0.0   0.0   0.0
Short-term Investments 0.0   0.0   0.0
Long-term investments (note 2) 55.5   55.5   52.7
Restricted Cash Equivalents 0.0   0.0   0.0
Level 2:          
Cash, Cash Equivalents and Investments [Line Items]          
Cost Basis 279.9   279.9   205.5
Debt Securities, Available-for-Sale, Unrealized Gain     0.0   0.0
Debt Securities, Available-for-Sale, Unrealized Loss     (0.1)   0.0
Fair Value 279.8   279.8   205.5
Cash and cash equivalents (note 2) 154.4   154.4   106.1
Short-term Investments 111.3   111.3   85.2
Long-term investments (note 2) 0.0   0.0   0.0
Restricted Cash Equivalents 14.1   14.1   14.2
Level 2: | Term deposits, and certificates of deposits          
Cash, Cash Equivalents and Investments [Line Items]          
Cost Basis 59.6   59.6   49.7
Debt Securities, Available-for-Sale, Unrealized Gain     0.0   0.0
Debt Securities, Available-for-Sale, Unrealized Loss     0.0   0.0
Fair Value 59.6   59.6   49.7
Cash and cash equivalents (note 2) 30.1   30.1   20.1
Short-term Investments 20.0   20.0   20.0
Long-term investments (note 2) 0.0   0.0   0.0
Restricted Cash Equivalents 9.5   9.5   9.6
Level 2: | Bearer deposit notes          
Cash, Cash Equivalents and Investments [Line Items]          
Cost Basis 18.4   18.4   24.9
Debt Securities, Available-for-Sale, Unrealized Gain     0.0   0.0
Debt Securities, Available-for-Sale, Unrealized Loss     0.0   0.0
Fair Value 18.4   18.4   24.9
Cash and cash equivalents (note 2) 18.4   18.4   11.0
Short-term Investments 0.0   0.0   13.9
Long-term investments (note 2) 0.0   0.0   0.0
Restricted Cash Equivalents 0.0   0.0   0.0
Level 2: | Commercial paper          
Cash, Cash Equivalents and Investments [Line Items]          
Cost Basis 147.1   147.1   93.2
Debt Securities, Available-for-Sale, Unrealized Gain     0.0   0.0
Debt Securities, Available-for-Sale, Unrealized Loss     (0.1)   0.0
Fair Value 147.0   147.0   93.2
Cash and cash equivalents (note 2) 72.4   72.4   37.3
Short-term Investments 70.0   70.0   51.3
Long-term investments (note 2) 0.0   0.0   0.0
Restricted Cash Equivalents 4.6   4.6   4.6
Level 2: | Non-U.S. promissory notes          
Cash, Cash Equivalents and Investments [Line Items]          
Cost Basis 44.1   44.1   24.4
Debt Securities, Available-for-Sale, Unrealized Gain     0.0   0.0
Debt Securities, Available-for-Sale, Unrealized Loss     0.0   0.0
Fair Value 44.1   44.1   24.4
Cash and cash equivalents (note 2) 33.5   33.5   24.4
Short-term Investments 10.6   10.6   0.0
Long-term investments (note 2) 0.0   0.0   0.0
Restricted Cash Equivalents 0.0   0.0   0.0
Level 2: | Non-U.S. treasury bills          
Cash, Cash Equivalents and Investments [Line Items]          
Cost Basis 10.7   10.7   13.3
Debt Securities, Available-for-Sale, Unrealized Gain     0.0   0.0
Debt Securities, Available-for-Sale, Unrealized Loss     0.0   0.0
Fair Value 10.7   10.7   13.3
Cash and cash equivalents (note 2) 0.0   0.0   13.3
Short-term Investments 10.7   10.7   0.0
Long-term investments (note 2) 0.0   0.0   0.0
Restricted Cash Equivalents $ 0.0   $ 0.0   0.0
Level 3: | Equity securities          
Cash, Cash Equivalents and Investments [Line Items]          
Cost Basis         1.3
Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount         4.3
Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment, Annual Amount         0.0
Fair Value         5.6
Cash and cash equivalents (note 2)         0.0
Short-term Investments         0.0
Long-term investments (note 2)         5.6
Restricted Cash Equivalents         $ 0.0
[1] Cost basis for investments in privately-held companies includes the effect of returns of capital and impairment.
[2] Cost basis for investments in privately-held companies includes the effect of returns of capital and impairment.