REVENUES FROM CONTRACTS WITH CUSTOMERS (Details) - USD ($) $ in Millions	9 Months Ended
Oct. 31, 2022	Jan. 31, 2022
REVENUES FROM CONTRACTS WITH CUSTOMERS
Retained amounts by project owners	$ 49.4	$ 40.4
Revenue recognized	$ 109.9
Amounts of unpriced change orders included in transaction prices	13.2	7.5

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130549-203045

Name:	us-gaap_ContractWithCustomerLiabilityRevenueRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration