Pension Plan - Company's Pension Plan Asset Allocation, by Asset Category (Detail)	Feb. 29, 2020	Feb. 28, 2019
Defined Benefit Plan Disclosure [Line Items]
Pension plan asset allocation by asset category	100.00%	100.00%
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan asset allocation by asset category	47.00%	46.00%
Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan asset allocation by asset category	44.00%	48.00%
Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan asset allocation by asset category	9.00%	6.00%