Annual report [Section 13 and 15(d), not S-K Item 405]

Stock-Based Employee Compensation - Narrative (Details)

v3.25.1
Stock-Based Employee Compensation - Narrative (Details)
$ in Millions
12 Months Ended 23 Months Ended
Feb. 28, 2025
USD ($)
stock_based_compensation_plan
shares
Feb. 29, 2024
shares
Feb. 28, 2023
shares
Feb. 28, 2025
USD ($)
stock_based_compensation_plan
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of stock-based employee compensation plans | stock_based_compensation_plan 2     2
Total unrecognized compensation cost related to nonvested stock-based compensation arrangements | $ $ 57.6     $ 57.6
Expected weighted average period to recognize nonvested stock-based compensation cost 1 year 7 months 6 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     108,000,000
Aggregate intrinsic value, Options outstanding | $ $ 12.6     $ 12.6
Aggregate intrinsic value, Options exercisable | $ $ 12.6     $ 12.6
Weighted average remaining contractual life, Options outstanding 5 years 6 months      
Weighted average remaining contractual life, Options exercisable 4 years 10 months 24 days      
Long-Term Stock Incentive Plan | Stock options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period       3 years
Expiration period       10 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       3 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%     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%     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     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 67,405 59,408 57,284