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The company operations threshold, as defined in the agreement, reached to determine the number of PSUs to convert into common shares.

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Shares remained available under the purchase plan

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Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

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Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan.

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Number of shares authorized for issuance under share-based payment arrangement.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of shares issued during the period as a result of an employee stock purchase plan.

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Amount of stock repurchase plan authorized.

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Amount remaining of a stock repurchase plan authorized.

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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. 29, 2020	Feb. 28, 2019	Feb. 28, 2018
Preferred Stock
Stock and Stock-Based Incentive Plans
Preferred shares authorized (in shares)	20,000,000		20,000,000
Preferred Stock, par value (in dollars per share)	$ 20		$ 20
Preferred stock shares outstanding (in shares)	0		0
Share Repurchase Program
Stock and Stock-Based Incentive Plans
Share repurchase, authorized amount	$ 2,000,000,000		$ 2,000,000,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 1,552,300,000		$ 1,552,300,000	$ 2,113,900,000	$ 1,016,800,000
Stock Compensation Plan
Stock and Stock-Based Incentive Plans
Common stock, shares authorized (in shares)	59,350,000		59,350,000
Common shares reserved for future grants	7,972,743		7,972,743
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		1,557,000	1,609,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 66.85		$ 66.85	$ 58.00
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		477,000	509,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 84.05		$ 84.05	$ 74.36
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	128,487		128,487
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 68.32		$ 68.32
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	38,730		38,730
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 80.19		$ 80.19
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	4,517		4,517
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 88.54		$ 88.54
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)			2,628,021
Common stock, shares authorized (in shares)	8,000,000		8,000,000
Associate contribution limit	10.00%		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			174,325	185,856	177,433
Stock Issued During Period, Value, Employee Stock Purchase Plan			$ 85.64	$ 67.66	$ 65.11