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GOODWILL (Tables)
9 Months Ended
Sep. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Changes in Carrying Amount of Goodwill by Reportable Segment
Changes in the carrying amount of goodwill by reportable segment from December 31, 2023 to September 30, 2024 are shown below:
in millionsAggregatesAsphaltConcreteTotal
Goodwill at December 31, 2023$3,330.2 $91.6 $109.9 $3,531.7 
Goodwill of acquired businesses 1
4.9 0.0 0.0 4.9 
Goodwill impairment
0.0 0.0 (86.6)(86.6)
Goodwill at September 30, 2024 $3,335.1 $91.6 $23.3 $3,450.0 
1See Note 16 for acquisitions.