Annual report pursuant to Section 13 and 15(d)

Stock-Based Employee Compensation - Narrative (Details)

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Stock-Based Employee Compensation - Narrative (Details)
$ in Millions
1 Months Ended 11 Months Ended 12 Months Ended
Mar. 31, 2023
Feb. 29, 2024
USD ($)
stock_based_compensation_plan
shares
Feb. 29, 2024
USD ($)
stock_based_compensation_plan
shares
Feb. 28, 2023
shares
Feb. 28, 2022
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 | $   $ 69.9 $ 69.9    
Expected weighted average period to recognize nonvested stock-based compensation cost     1 year 9 months 18 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 | $   $ 118.1 $ 118.1    
Aggregate intrinsic value, Options exercisable | $   $ 94.2 $ 94.2    
Weighted average remaining contractual life, Options outstanding     6 years    
Weighted average remaining contractual life, Options exercisable     5 years 2 months 12 days    
Long-Term Stock Incentive Plan | Stock options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period 4 years 3 years      
Expiration period   10 years      
Long-Term Stock Incentive Plan | Restricted stock | Minimum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period 1 year 1 year      
Long-Term Stock Incentive Plan | Restricted stock | Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period 4 years 3 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 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 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     59,408 57,284 57,738