GOODWILL (Changes in Carrying Amount of Goodwill by Reportable Segment) (Details) $ in Millions	6 Months Ended
	Jun. 30, 2023 USD ($)
Goodwill [Line Items]
Goodwill, Beginning balance	$ 3,689.6
Goodwill of acquired businesses	(0.1)
Goodwill, Ending balance	3,689.5
Aggregates [Member]
Goodwill [Line Items]
Goodwill, Beginning balance	3,330.3
Goodwill of acquired businesses	(0.1)
Goodwill, Ending balance	3,330.2
Asphalt [Member]
Goodwill [Line Items]
Goodwill, Beginning balance	91.6
Goodwill of acquired businesses	0.0
Goodwill, Ending balance	91.6
Concrete [Member]
Goodwill [Line Items]
Goodwill, Beginning balance	267.7
Goodwill of acquired businesses	0.0
Goodwill, Ending balance	267.7
Calcium [Member]
Goodwill [Line Items]
Goodwill, Beginning balance	0.0
Goodwill of acquired businesses	0.0
Goodwill, Ending balance	$ 0.0