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REVENUES FROM CONTRACT WITH CUSTOMERS - Variable Consideration (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Oct. 31, 2018 | Oct. 31, 2018 | Jan. 31, 2018
REVENUES FROM CONTRACT WITH CUSTOMERS |  |  |
Amounts of unpriced change orders included in transaction prices | $ 10.6 | $ 10.6 | $ 9.3
Impact on revenues, changes in estimates of the costs-to-complete active contracts | $ 16.7 | $ 29.7 |

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- Definition Amount of increase (decrease) in revenue recognized for cumulative catch-up adjustment from change in measure of progress which (increases) decreases obligation to transfer good or service to customer for which consideration from customer has been received or is due. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130551-203045 + Details
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