v3.26.1
Share-Based Compensation - Equity Incentive Plans, Stock Compensation Expense (Details) - USD ($)
$ in Millions
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Pre-tax effect of share-based compensation $ 255.4 $ 180.4 $ 177.5
Income tax benefit 53.1 37.9 37.5
Net income effect of share-based compensation 202.3 142.5 140.0
Capitalized share-based compensation expense 22.0 17.4 19.0
Share-based compensation expense previously capitalized 34.9 21.8 25.6
Amortization expense charged to cost of sales      
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Pre-tax effect of share-based compensation 34.9 21.8 25.6
Research and development      
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Pre-tax effect of share-based compensation 140.0 104.6 94.3
Selling, general and administrative      
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Pre-tax effect of share-based compensation $ 80.5 $ 54.0 $ 57.6