Pension Plan - Company's Pension Plan Asset Allocation, by Asset Category (Detail)	Feb. 28, 2021	Feb. 29, 2020
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	57.00%	47.00%
Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan asset allocation by asset category	40.00%	44.00%
Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan asset allocation by asset category	3.00%	9.00%