Annual report pursuant to Section 13 and 15(d)

Stock-Based Employee Compensation - Narrative (Details)

v3.22.1
Stock-Based Employee Compensation - Narrative (Details)
$ in Millions
12 Months Ended
Feb. 28, 2022
USD ($)
stock_based_compensation_plan
shares
Feb. 28, 2021
shares
Feb. 29, 2020
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of stock-based employee compensation plans | stock_based_compensation_plan 2    
Total unrecognized compensation cost related to nonvested stock-based compensation arrangements | $ $ 64.3    
Expected weighted average period to recognize nonvested stock-based compensation cost 2 years 2 months 12 days    
Long-Term Stock Incentive Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Aggregate number of shares authorized (in shares) | shares 108,000,000    
Aggregate intrinsic value, Options outstanding | $ $ 123.1    
Aggregate intrinsic value, Options exercisable | $ $ 79.8    
Weighted average remaining contractual life, Options outstanding 6 years 8 months 12 days    
Weighted average remaining contractual life, Options exercisable 5 years 1 month 6 days    
Long-Term Stock Incentive Plan | Stock options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 4 years    
Expiration period 10 years    
Long-Term Stock Incentive Plan | Restricted Stock Awards | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 1 year    
Long-Term Stock Incentive Plan | Restricted Stock Awards | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 4 years    
Long-Term Stock Incentive Plan | Restricted Stock Units | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 1 year    
Long-Term Stock Incentive Plan | Restricted Stock Units | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 4 years    
Long-Term Stock Incentive Plan | Performance Share Units | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 1 year    
Target percentage of units to be awarded based on performance 0.00%    
Long-Term Stock Incentive Plan | Performance Share Units | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 3 years    
Target percentage of units to be awarded based on performance 200.00%    
1989 Employee Stock Purchase Plan | Employee stock purchase plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Aggregate number of shares authorized (in shares) | shares 9,000,000    
Purchase price as a percent of the fair market value, lower of the fair market value on the first or last day of the purchase period 85.00%    
Shares purchased under employee stock purchase plan (in shares) | shares 57,738 67,801 69,324