Represents the number of active share-based compensation plans of the entity.

No definition available.

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- Definition

Number Of Expired Share Based Compensation Plans

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- Definition

Share-Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options, Grant Date Fair Value

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Share Based Compensation Arrangement By Share Based Payment Award, Equity Instruments Other Than Options, Target Achievement, Percentage

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No definition available.

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- Definition

Share-Based Compensation Arrangement By Share-Based Payment Award, Performance Period For Determining Award

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- Definition

Share-Based Compensation Arrangement by Share-Based Payment Award, Performance Stock Target Percentage

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No definition available.

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- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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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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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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- Definition

Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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- Definition

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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- Definition

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

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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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- Definition

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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- Definition

Gross number of share options (or share units) granted during the period.

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Number of shares issued under share-based payment arrangement.

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

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Purchase price of common stock expressed as a percentage of its fair value.

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Share-Based Compensation Plans - Narrative (Details) $ / shares in Units, $ in Millions		12 Months Ended
	Aug. 22, 2018 shares	Feb. 28, 2026 USD ($) plan $ / shares shares	Feb. 28, 2025 USD ($) $ / shares shares	Feb. 29, 2024 USD ($) $ / shares shares	Feb. 28, 2023 shares	Feb. 28, 2022 shares	Feb. 28, 2021 shares	Feb. 29, 2020 shares	Feb. 28, 2019 shares	Feb. 28, 2018 shares	Feb. 28, 2017 shares
Share-based compensation plans
Number of expired share based compensation plans \| plan		2
Number of active share-based compensation plans \| plan		2
New grants of options (in shares)		0	0	0	0	0	0	0	0	0	0
Exercises (in shares) \| $		$ 0.0	$ 0.2	$ 0.3
Target percentage for performance stock awards		0.00%	0.00%	0.00%
Target achievement as a percentage		83.00%	81.00%	0.00%
Unrecognized compensation expense \| $		$ 15.0
Weighted average period of recognition (in years)		1 year 9 months 18 days
The 2025 Plan
Share-based compensation plans
Shares available for issuance (in shares)		1,102,944
Employee Stock
Share-based compensation plans
Shares purchased for 2018 ESPP (in shares)		94,685
Maximum withholding percentage of employee wages or salaries for the purchase of shares of common stock	15.00%
Purchase price for shares acquired under the plan as a percentage of the share's fair market value	85.00%
Restricted Stock \| Directors \| The 2018 Plan and The 2025 Plan
Share-based compensation plans
Shares issued under plan (in shares)		29,080
Aggregate grant date fair value of shares issued (in dollars per share) \| $		$ 0.8	$ 0.8	$ 0.8
Grant date fair value (in dollars per share) \| $ / shares		$ 26.97
Restricted Stock Awards and Restricted Stock Units \| The 2018 Plan
Share-based compensation plans
Grant date fair value (in dollars per share) \| $ / shares		$ 43.64	$ 99.20	$ 109.97
Fair value of awards vested \| $		$ 5.5	$ 8.8	$ 6.2
Restricted Stock Awards and Restricted Stock Units \| 2008 Stock Incentive Plan
Share-based compensation plans
Grant date fair value (in dollars per share) \| $ / shares		$ 43.64
Vested (in shares)		(148,000)
Performance Stock Awards
Share-based compensation plans
Performance period for PSU awards		3 years
Target percentage for performance stock awards		100.00%
Performance Stock Awards \| Cliff Vest
Share-based compensation plans
Award vesting period		3 years
Performance Stock Awards \| The 2018 Plan
Share-based compensation plans
Fair value of awards vested \| $		$ 0.0	$ 0.0	$ 7.5
Market Condition Awards
Share-based compensation plans
Grant date fair value (in dollars per share) \| $ / shares		$ 26.47	$ 91.19	$ 80.49
Performance period for PSU awards		3 years
Target achievement as a percentage		100.00%
Market Condition Awards \| Cliff Vest
Share-based compensation plans
Award vesting period		3 years
Market Condition Awards \| 2008 Stock Incentive Plan
Share-based compensation plans
Vested (in shares)		0	0
Minimum \| Restricted Stock Awards and Restricted Stock Units
Share-based compensation plans
Award vesting period		2 years
Minimum \| Performance Stock Awards
Share-based compensation plans
Target percentage for performance stock awards		0.00%
Minimum \| Market Condition Awards
Share-based compensation plans
Target achievement as a percentage		0.00%
Maximum \| Employee Stock
Share-based compensation plans
Shares purchased for 2018 ESPP (in shares)	750,000
Maximum \| Restricted Stock Awards and Restricted Stock Units
Share-based compensation plans
Award vesting period		4 years
Maximum \| Performance Stock Awards
Share-based compensation plans
Target percentage for performance stock awards		200.00%
Maximum \| Market Condition Awards
Share-based compensation plans
Target achievement as a percentage		200.00%