v3.26.1
Nature of Operations and Summary of Significant Accounting Policies - Change in Accounting Principle (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Loss Contingencies [Line Items]      
Cost of revenues $ 3,309.4 $ 3,056.8 $ 2,920.5
Gross Profit 2,626.5 2,402.8 2,218.2
Operating Income (Loss) 1,101.8 866.6 836.1
Income Tax Expense (Benefit) 262.2 184.7 149.5
Income from continuing operations, net of income tax 785.1 616.1 380.1
Net Income (Loss) Attributable to Parent $ 782.3 $ 614.6 $ 378.2
Earnings Per Share, Basic $ 7.97 $ 6.24 $ 3.83
Earnings Per Share, Diluted $ 7.93 $ 6.20 $ 3.81
Comprehensive Income (Loss), Net of Tax, Attributable to Parent $ 961.5 $ 651.0 $ 370.3
Inventory, Net 631.8 581.3  
Retained earnings 3,015.9 2,475.3  
Increase (Decrease) in Inventories (24.0) 73.1 (37.5)
Accruals and other, net 47.8 38.9 40.0
Deferred income taxes (16.9) (76.5) (131.4)
Product      
Loss Contingencies [Line Items]      
Cost of revenues $ 1,625.5 $ 1,514.3 $ 1,516.1