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Stock and Stock-Based Incentive Plans Stock and Stock-Based Incentive Plans (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
May 31, 2021
Feb. 28, 2021
May 31, 2020
Share Repurchase Program      
Stock and Stock-Based Incentive Plans      
Stock Repurchase Program, Authorized Amount $ 2,000.0    
Available for repurchase, as of end of period $ 1,211.5   $ 1,511.6
Equity Option [Member]      
Stock and Stock-Based Incentive Plans      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 4 years    
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period 7 years    
Cash-settled restricted stock units (RSUs)      
Stock and Stock-Based Incentive Plans      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 3 years    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 1,239,000 1,606,000  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value $ 93.01 $ 70.88  
Cash-settled restricted stock units (RSUs) | Minimum      
Stock and Stock-Based Incentive Plans      
Cash payment per cash settled restricted stock unit 75.00%    
Cash-settled restricted stock units (RSUs) | Maximum      
Stock and Stock-Based Incentive Plans      
Cash payment per cash settled restricted stock unit 200.00%    
Stock-settled market stock units (MSUs)      
Stock and Stock-Based Incentive Plans      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 3 years    
Share-based Compensation Arrangement by Share-based Payment Award, Conversion Ratio Quotient 2    
Market Stock Units Converted To Common Stock Conversion Ratio Number Of Final Trading Days In Vesting Period 40 days    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 406,000 520,000  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value $ 112.12 $ 90.53  
Stock-settled market stock units (MSUs) | Minimum      
Stock and Stock-Based Incentive Plans      
Stock units converted to common stock for each unit granted 0    
Stock-settled market stock units (MSUs) | Maximum      
Stock and Stock-Based Incentive Plans      
Stock units converted to common stock for each unit granted 2    
Performance Shares [Member]      
Stock and Stock-Based Incentive Plans      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 3 years    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 75,845    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value $ 118.72    
Performance Shares [Member] | Minimum      
Stock and Stock-Based Incentive Plans      
PSU conversion threshold 25.00%    
Stock units converted to common stock for each unit granted 0    
Performance Shares [Member] | Maximum      
Stock and Stock-Based Incentive Plans      
PSU conversion threshold 200.00%    
Stock units converted to common stock for each unit granted 2    
Deferred Stock Units [Member]      
Stock and Stock-Based Incentive Plans      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 1 year    
Stock units converted to common stock for each unit granted 1    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 56,921    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value $ 82.23    
Restricted Stock [Member]      
Stock and Stock-Based Incentive Plans      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 5,591    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value $ 89.41    
Restricted Stock [Member] | Minimum      
Stock and Stock-Based Incentive Plans      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 1 year    
Restricted Stock [Member] | Maximum      
Stock and Stock-Based Incentive Plans      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 3 years    
Fiscal 2020 Grants - Year 1 [Member] | Performance Shares [Member]      
Stock and Stock-Based Incentive Plans      
PSU conversion threshold 117.00%    
Fiscal 2020 Grants - Year 2 | Performance Shares [Member]      
Stock and Stock-Based Incentive Plans      
PSU conversion threshold 100.00%    
PSU Grants - Performance Target Not Set [Member] | Performance Shares [Member]      
Stock and Stock-Based Incentive Plans      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 25,397