v3.26.1
Share-Based Compensation - Equity Incentive Plans, RSU and PSU Activity (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]      
Share price (in dollars per share) $ 64.61    
Restricted Stock Units      
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Nonvested shares at beginning of period (in shares) 9,578,437 8,214,196 8,663,602
Granted (in shares) 5,036,212 4,921,190 2,535,772
Forfeited (in shares) (1,075,449) (1,191,134) (474,397)
Vested (in shares) (2,382,678) (2,365,815) (2,510,781)
Nonvested shares at end of period (in shares) 11,156,522 9,578,437 8,214,196
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]      
Nonvested shares at beginning of period (in dollars per share) $ 70.28 $ 67.22 $ 58.72
Granted (in dollars per share) 56.23 70.74 77.28
Forfeited (in dollars per share) 66.14 71.27 64.37
Vested (in dollars per share) 67.78 60.12 48.56
Nonvested shares at end of period (in dollars per share) $ 64.87 $ 70.28 $ 67.22
RSU Vested aggregate intrinsic value $ 156.9 $ 176.2 $ 201.4
Total intrinsic value of awards outstanding 720.8    
Unvested share-based payment awards $ 394.2    
Weighted average remaining expense recognition period (in years) 1 year 11 months 26 days    
Market-based Performance Shares | Minimum      
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]      
Shares expected to received at vesting, percent 0.00%    
Measurement period 2 years    
Market-based Performance Shares | Maximum      
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]      
Shares expected to received at vesting, percent 200.00%    
Measurement period 3 years    
Performance Shares      
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Nonvested shares at beginning of period (in shares) 318,264 501,734 380,870
Granted (in shares) 289,499 183,304 123,747
Forfeited (in shares) (77,372) (207,481) (2,883)
Vested (in shares) (74,989) (159,293) 0
Nonvested shares at end of period (in shares) 455,402 318,264 501,734
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]      
Nonvested shares at beginning of period (in dollars per share) $ 71.45 $ 71.33 $ 69.51
Granted (in dollars per share) 61.79 71.92 77.61
Forfeited (in dollars per share) 67.22 72.21 100.20
Vested (in dollars per share) 80.18 70.71 0
Nonvested shares at end of period (in dollars per share) $ 64.34 $ 71.45 $ 71.33
Total intrinsic value of awards outstanding $ 29.4    
Unvested share-based payment awards $ 32.0    
Weighted average remaining expense recognition period (in years) 2 years 7 months 20 days    
Performance Shares | Minimum      
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]      
Shares expected to received at vesting, percent 0.00%    
Measurement period 2 years    
Performance Shares | Maximum      
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]      
Shares expected to received at vesting, percent 200.00%    
Measurement period 3 years