PROPERTY, PLANT & EQUIPMENT (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Capitalized software costs	$ 14.7	$ 2.1
Capitalized software costs during the year	2.7	$ 1.1	$ 1.5
U.S. Concrete, Inc. [Member]
Property, Plant and Equipment [Line Items]
Capitalized software costs	$ 13.2