v3.26.1
Share-Based Employee Compensation - Summary of Number and Weighted Average Exercise Prices (Detail) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Share Based Compensation Stock Options Activity [Line Items]        
Aggregate Intrinsic Value, Awards exercised $ 175.8 $ 148.4 $ 177.7  
Share-Based Payment Arrangement [Member]        
Share Based Compensation Stock Options Activity [Line Items]        
Number of share awards. Beginning Balance 40,767,978 53,590,058 65,648,858  
Number of share awards, Awards granted 11,477,541 7,547,396 11,460,714  
Number of share awards, Awards exercised (13,436,927) (17,194,598) (19,895,709)  
Number of share awards, Awards forfeited (2,152,587) (3,174,878) (3,623,805)  
Number of share awards, Ending Balance 36,656,005 40,767,978 53,590,058 65,648,858
Number of share awards, Exercisable 19,069,428      
Weighted average exercise price, Beginning Balance $ 0.1 $ 0.11 $ 0.11  
Weighted average exercise price, Awards granted 0 0 0  
Weighted average exercise price, Awards exercised 0.03 0.1 0.07  
Weighted average exercise price, Awards forfeited 0 0 0.01  
Weighted average exercise price, Ending Balance 0.1 $ 0.1 $ 0.11 $ 0.11
Weighted average exercise price, Exercisable $ 0.19      
Average Remaining Contractual Term 6 years 4 months 24 days 6 years 4 months 24 days 6 years 9 months 18 days 7 years 1 month 6 days
Average Remaining Contractual Term, Exercisable 4 years 3 months 18 days      
Aggregate Intrinsic Value, Beginning Balance $ 504.0 $ 624.3 $ 433.4  
Aggregate Intrinsic Value, Awards granted 137.3 0.0 0.0  
Aggregate Intrinsic Value, Awards exercised 175.8 148.4 177.7  
Aggregate Intrinsic Value, Awards forfeited 27.8 27.6 33.6  
Aggregate Intrinsic Value, Ending Balance 434.8 $ 504.0 $ 624.3 $ 433.4
Aggregate Intrinsic Value, Exercisable $ 224.4