Pension Plan - Company's Pension Plan Asset Allocation, by Asset Category (Detail)	Feb. 28, 2023	Feb. 28, 2022
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	52.00%	57.00%
Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan asset allocation by asset category	44.00%	40.00%
Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan asset allocation by asset category	4.00%	3.00%