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Stock And Stock-Based Incentive Plans (Narrative) (Details) - USD ($) | 2 Months Ended | 10 Months Ended | 12 Months Ended
--- | --- | --- | ---
Feb. 29, 2020 | Dec. 31, 2019 | Feb. 28, 2021 | Feb. 29, 2020 | Feb. 28, 2019
Preferred Stock |  |  |  |  |
Stock and Stock-Based Incentive Plans |  |  |  |  |
Preferred shares authorized (in shares) |  |  | 20,000,000 |  |
Preferred Stock, par value (in dollars per share) |  |  | $ 20 |  |
Preferred stock shares outstanding (in shares) |  |  | 0 |  |
Share Repurchase Program |  |  |  |  |
Stock and Stock-Based Incentive Plans |  |  |  |  |
Share repurchase, authorized amount |  |  | $ 2,000,000,000 |  |
Stock Repurchase Program, Remaining Authorized Repurchase Amount | $ 1,552,300,000 |  | $ 1,336,100,000 | $ 1,552,300,000 | $ 2,113,900,000
Stock Compensation Plan |  |  |  |  |
Stock and Stock-Based Incentive Plans |  |  |  |  |
Common stock, shares authorized (in shares) |  |  | 60,850,000 |  |
Common shares reserved for future grants |  |  | 7,734,437 |  |
Stock Option |  |  |  |  |
Stock and Stock-Based Incentive Plans |  |  |  |  |
Vesting period, in years |  |  | 4 years |  |
Years until expiration |  |  | 7 years |  |
Cash-Settled Restricted Stock Units |  |  |  |  |
Stock and Stock-Based Incentive Plans |  |  |  |  |
Vesting period, in years |  |  | 3 years |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number | 1,557,000 |  | 1,606,000 | 1,557,000 |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value | $ 66.85 |  | $ 70.88 | $ 66.85 |
Cash-Settled Restricted Stock Units | Minimum |  |  |  |  |
Stock and Stock-Based Incentive Plans |  |  |  |  |
Cash payment per RSU, percentage |  |  | 75.00% |  |
Cash-Settled Restricted Stock Units | Maximum |  |  |  |  |
Stock and Stock-Based Incentive Plans |  |  |  |  |
Cash payment per RSU, percentage |  |  | 200.00% |  |
Stock-Settled Market Stock Units |  |  |  |  |
Stock and Stock-Based Incentive Plans |  |  |  |  |
Vesting period, in years |  |  | 3 years |  |
Conversion ratio, number of final trading days in vesting period |  |  | 40 days |  |
Share-based Compensation Arrangement by Share-based Payment Award, Conversion Ratio Quotient |  |  | 2 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number | 477,000 |  | 520,000 | 477,000 |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value | $ 84.05 |  | $ 90.53 | $ 84.05 |
Stock-Settled Market Stock Units | Minimum |  |  |  |  |
Stock and Stock-Based Incentive Plans |  |  |  |  |
Stock units converted to common stock |  |  | 0 |  |
Stock-Settled Market Stock Units | Maximum |  |  |  |  |
Stock and Stock-Based Incentive Plans |  |  |  |  |
Stock units converted to common stock |  |  | 2 |  |
Performance Shares |  |  |  |  |
Stock and Stock-Based Incentive Plans |  |  |  |  |
Vesting period, in years |  |  | 3 years |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number |  |  | 21,053 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value |  |  | $ 78.61 |  |
Performance Shares | Fiscal 2018 grants |  |  |  |  |
Stock and Stock-Based Incentive Plans |  |  |  |  |
PSU conversion threshold |  |  | 119.00% |  |
Performance Shares | Fiscal 2020 grants - Year 1 |  |  |  |  |
Stock and Stock-Based Incentive Plans |  |  |  |  |
PSU conversion threshold |  |  | 117.00% |  |
Performance Shares | Fiscal 2020 Grants - Performance Target Not Set |  |  |  |  |
Stock and Stock-Based Incentive Plans |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number |  |  | 42,099 |  |
Performance Shares | Minimum |  |  |  |  |
Stock and Stock-Based Incentive Plans |  |  |  |  |
Stock units converted to common stock |  |  | 0 |  |
PSU conversion threshold |  |  | 25.00% |  |
Performance Shares | Maximum |  |  |  |  |
Stock and Stock-Based Incentive Plans |  |  |  |  |
Stock units converted to common stock |  |  | 2 |  |
PSU conversion threshold |  |  | 200.00% |  |
Deferred Stock Units |  |  |  |  |
Stock and Stock-Based Incentive Plans |  |  |  |  |
Vesting period, in years |  |  | 1 year |  |
Stock units converted to common stock |  |  | 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 Awards |  |  |  |  |
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 Awards | Minimum |  |  |  |  |
Stock and Stock-Based Incentive Plans |  |  |  |  |
Vesting period, in years |  |  | 1 year |  |
Restricted Stock Awards | Maximum |  |  |  |  |
Stock and Stock-Based Incentive Plans |  |  |  |  |
Vesting period, in years |  |  | 3 years |  |
Employee Stock Purchase Plan |  |  |  |  |
Stock and Stock-Based Incentive Plans |  |  |  |  |
Shares remained available under the purchase plan (in shares) |  |  | 2,425,936 |  |
Common stock, shares authorized (in shares) |  |  | 8,000,000 |  |
Associate contribution limit |  |  | 10.00% |  |
Associate contribution limit, value | $ 10,000 | $ 7,500 |  |  |
Company match |  |  | $ 0.15 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Shares Purchased for Award |  |  | 202,085 | 174,325 | 185,856
Stock Issued During Period, Value, Employee Stock Purchase Plan |  |  | $ 87.41 | $ 85.64 | $ 67.66

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