GOODWILL (Changes in Carrying Amount of Goodwill by Reportable Segment) (Details) - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Goodwill [Line Items]
Goodwill		$ 3,531.7	$ 3,689.6	$ 3,704.5
Goodwill of acquired businesses	[1]	(0.1)
Goodwill	[2]	3,689.5
Aggregates [Member]
Goodwill [Line Items]
Goodwill			3,330.3
Goodwill of acquired businesses	[1]	(0.1)
Goodwill	[2]	3,330.2
Asphalt [Member]
Goodwill [Line Items]
Goodwill			91.6
Goodwill of acquired businesses	[1]	0.0
Goodwill	[2]	91.6
Concrete [Member]
Goodwill [Line Items]
Goodwill			267.7
Goodwill of acquired businesses	[1]	0.0
Goodwill	[2]	267.7
Calcium [Member]
Goodwill [Line Items]
Goodwill			$ 0.0
Goodwill of acquired businesses	[1]	0.0
Goodwill	[2]	$ 0.0

[1] See Note 16 for acquisitions. The current year includes a purchase price allocation adjustment from a prior year acquisition.

[2] The Concrete segment balance at September 30, 2023 includes goodwill classified as held for sale as detailed in Note 16.