GOODWILL - Changes in Carrying Amount of Goodwill by Reportable Segment (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 3,531.7	$ 3,689.6
Goodwill, ending balance	3,531.7	3,531.7
Aggregates
Goodwill [Roll Forward]
Goodwill, beginning balance	3,330.2
Goodwill, ending balance	3,330.2	3,330.2
Asphalt
Goodwill [Roll Forward]
Goodwill, beginning balance	91.6
Goodwill, ending balance	91.6	91.6
Concrete
Goodwill [Roll Forward]
Goodwill, beginning balance	109.9
Goodwill, ending balance	$ 109.9	$ 109.9