Income Taxes - Reconcilliation of Effective Income Tax Rate (Details)	12 Months Ended
Feb. 29, 2020	Feb. 28, 2019	Feb. 28, 2018
Income Tax Disclosure [Abstract]
Statutory federal income tax rate	21.00%	21.00%	32.70%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Meals and Entertainment, Percent	0.10%	0.50%	1.60%
State income taxes, net of federal income tax benefit	0.00%	0.40%	0.40%
Benefit of Section 199 of the Code, manufacturing deduction	0.00%	0.00%	(2.20%)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent	0.00%	(0.70%)	0.00%
Effective Income Tax Rate Reconciliation,Other Reconciling Items, Percent	0.00%	0.50%	(0.50%)
Other	(0.20%)	0.00%	0.20%
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	2.00%	(4.10%)	(7.70%)
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent	1.40%	1.10%	(0.40%)
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent	0.00%	0.00%	(78.90%)
Effective Income Tax Rate Reconciliation, Tax Contingency, Percent	1.40%	0.00%	0.00%
Effective Income Tax Rate Reconciliation, Tax Contingency, Domestic, Percent	0.00%	0.00%	8.60%
Effective income tax rate	25.70%	18.70%	(46.20%)

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile.

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Percentage of the difference, between reported income tax expense (benefit) and the expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, that is attributable to tax exempt income, equity in earnings (loss) of an unconsolidated subsidiary, minority interest income (expense), tax holiday, disposition of a business, disposition of an asset, repatriation of foreign earnings, repatriation of foreign earnings jobs creation act of 2004, change in enacted tax rate, prior year income taxes, change in deferred tax asset valuation allowance, and other adjustments.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to income tax contingencies. Includes, but not limited to, domestic tax contingency, foreign tax contingency, state and local tax contingency, and other contingencies.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax credits. Including, but not limited to, research credit, foreign tax credit, investment tax credit, and other tax credits.

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