REVENUES (Revenues by Geographic Market) (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	$ 1,540.7	$ 1,068.3
Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	1,650.7	1,125.5
Intersegment Sales [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	(110.0)	(57.2)
U.S. Concrete, Inc. [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		353.7
East [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	334.9	315.8
Gulf Coast [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	686.4	579.8
West [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	275.7	229.9
Aggregates [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	1,011.2	837.7
Aggregates [Member] | Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1],[2]	1,121.2	894.9
Aggregates [Member] | Intersegment Sales [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	(110.0)	(57.2)
Aggregates [Member] | U.S. Concrete, Inc. [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		84.2
Aggregates [Member] | East [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	255.5	243.3
Aggregates [Member] | Gulf Coast [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	629.4	518.9
Aggregates [Member] | West [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	152.1	132.7
Asphalt [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	167.1	147.2
Asphalt [Member] | Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1],[3]	167.1	147.2
Asphalt [Member] | Intersegment Sales [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	0.0	0.0
Asphalt [Member] | U.S. Concrete, Inc. [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		0.0
Asphalt [Member] | East [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	21.3	17.4
Asphalt [Member] | Gulf Coast [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	36.5	41.4
Asphalt [Member] | West [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	109.3	88.4
Concrete [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	360.5	81.3
Concrete [Member] | Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	360.5	81.3
Concrete [Member] | Intersegment Sales [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	0.0	0.0
Concrete [Member] | U.S. Concrete, Inc. [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		269.5
Concrete [Member] | East [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	58.1	55.1
Concrete [Member] | Gulf Coast [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	18.6	17.4
Concrete [Member] | West [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	14.3	8.8
Calcium [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	1.9	2.1
Calcium [Member] | Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	1.9	2.1
Calcium [Member] | Intersegment Sales [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	0.0	0.0
Calcium [Member] | U.S. Concrete, Inc. [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		0.0
Calcium [Member] | East [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	0.0	0.0
Calcium [Member] | Gulf Coast [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	1.9	2.1
Calcium [Member] | West [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	$ 0.0	$ 0.0

[1] ¹ The geographic markets are defined by states/countries as follows: East market — Arkansas, Delaware, Illinois, Kentucky, Maryland, North Carolina, Pennsylvania, Tennessee, Virginia and Washington D.C. Gulf Coast market — Alabama, Florida, Georgia, Louisiana, Mississippi, Oklahoma, Quintana Roo (Mexico), South Carolina and Texas West market — Arizona, California and New Mexico U.S. Concrete — British Columbia (Canada), California, Hawaii, New Jersey, New York, Oklahoma, Pennsylvania, Texas, the U.S. Virgin Islands and Washington D.C.

[2] Includes product sales (crushed stone, sand and gravel, sand, and other aggregates), as well as freight & delivery costs that we pass along to our customers, and service revenues (see Note 4) related to aggregates.

[3] Includes product sales, as well as service revenues (see Note 4) from our asphalt construction paving business.