GOODWILL AND INTANGIBLE ASSETS (Changes in Carrying Amount of Goodwill by Reportable Segment) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020
Goodwill [Line Items]
Goodwill, Beginning balance		$ 3,172.1	$ 3,167.0
Goodwill of acquired businesses	[1]	524.6	5.1
Goodwill, Ending balance		3,696.7	3,172.1
Aggregates [Member]
Goodwill [Line Items]
Goodwill, Beginning balance		3,080.5	3,075.4
Goodwill of acquired businesses	[1]	236.1	5.1
Goodwill, Ending balance		3,316.6	3,080.5
Asphalt [Member]
Goodwill [Line Items]
Goodwill, Beginning balance		91.6	91.6
Goodwill of acquired businesses	[1]	0.0	0.0
Goodwill, Ending balance		91.6	91.6
Concrete [Member]
Goodwill [Line Items]
Goodwill, Beginning balance		0.0	0.0
Goodwill of acquired businesses	[1]	288.5	0.0
Goodwill, Ending balance		288.5	0.0
Calcium [Member]
Goodwill [Line Items]
Goodwill, Beginning balance		0.0	0.0
Goodwill of acquired businesses	[1]	0.0	0.0
Goodwill, Ending balance		$ 0.0	$ 0.0

[1] See Note 19 for a summary of recent acquisitions.