Inventories - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
Feb. 28, 2023	Feb. 28, 2022	Feb. 28, 2021
Inventory Disclosure [Abstract]
Excess of current costs at FIFO over LIFO stated values	$ 6.7	$ 5.9
Amount of valuation reserve for excess and obsolete inventory	1.6	1.5
Decrease in cost of sales	$ 0.3	$ 0.9	$ 0.1

The excess of replacement or current cost over the stated LIFO (last in first out) inventory value when the LIFO inventory method is utilized.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(6)(c))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Name:	us-gaap_ExcessOfReplacementOrCurrentCostsOverStatedLIFOValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant