GOODWILL (Changes in Carrying Amount of Goodwill by Reportable Segment) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2022 USD ($)
Goodwill [Line Items]
Goodwill, Beginning balance	$ 3,696.7
Goodwill of acquired businesses	12.5
Goodwill, Ending balance	3,709.2
Aggregates [Member]
Goodwill [Line Items]
Goodwill, Beginning balance	3,316.6
Goodwill of acquired businesses
Goodwill, Ending balance	3,316.6
Asphalt [Member]
Goodwill [Line Items]
Goodwill, Beginning balance	91.6
Goodwill of acquired businesses
Goodwill, Ending balance	91.6
Concrete [Member]
Goodwill [Line Items]
Goodwill, Beginning balance	288.5
Goodwill of acquired businesses	12.5
Goodwill, Ending balance	301.0
Calcium [Member]
Goodwill [Line Items]
Goodwill, Beginning balance
Goodwill of acquired businesses
Goodwill, Ending balance